Win32 updates (Karl Schultz)

1 files changed, 2971 insertions, 2955 deletions

diff --git a/src/mesa/drivers/windows/wmesa.c b/src/mesa/drivers/windows/wmesa.c
index 43f99f30f4..7eb13cab09 100644
--- a/src/mesa/drivers/windows/wmesa.c
+++ b/src/mesa/drivers/windows/wmesa.c
@@ -1,2955 +1,2971 @@
-/* $Id: wmesa.c,v 1.17 2001/05/21 14:46:33 brianp Exp $ */
-
-/*
- * Windows (Win32) device driver for Mesa 3.4
- *
- * Original author:
- *
- *  Copyright (C) 1996-  Li Wei
- *  Address      :       Institute of Artificial Intelligence
- *               :           & Robotics
- *               :       Xi'an Jiaotong University
- *  Email        :       liwei@aiar.xjtu.edu.cn
- *  Web page :       http://sun.aiar.xjtu.edu.cn
- *
- *  This file and its associations are partially borrowed from the
- *  Windows NT driver for Mesa 1.8 , written by Mark Leaming
- *  (mark@rsinc.com).
- */
-
-
-#define WMESA_STEREO_C
-
-#include <windows.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <GL/wmesa.h>
-#include "mesa_extend.h"
-#include "colors.h"
-#include "macros.h"
-#include "context.h"
-#include "dd.h"
-#include "xform.h"
-#include "vb.h"
-#include "matrix.h"
-#include "depth.h"
-#include "wmesadef.h"
-
-#pragma warning ( disable : 4100 4133 4761 )
-
-#ifdef PROFILE
-//  #include "profile.h"
-#endif
-
-#ifdef DITHER
-#include <wing.h>
-#endif
-
-#ifdef __CYGWIN32__
-#include "macros.h"
-#include <string.h>
-#define CopyMemory memcpy
-#endif
-
-#if !defined(NO_STEREO)
-
-#include "gl\glu.h"
-#include "stereo.h"
-
-#endif
-#if !defined(NO_PARALLEL)
-//  #include "parallel.h"
-#endif
-
-struct DISPLAY_OPTIONS displayOptions;
-
-GLenum stereoCompile = GL_FALSE ;
-GLenum stereoShowing  = GL_FALSE ;
-GLenum stereoBuffer = GL_FALSE;
-#if !defined(NO_STEREO)
-GLint displayList = MAXIMUM_DISPLAY_LIST ;
-#endif
-GLint stereo_flag = 0 ;
-
-/* end of added code*/
-
-static PWMC Current = NULL;
-WMesaContext WC = NULL;
-
-#ifdef NDEBUG
-#define assert(ignore)  ((void) 0)
-#else
-void Mesa_Assert(void *Cond,void *File,unsigned Line)
-{
-    char Msg[512];
-    sprintf(Msg,"%s %s %d",Cond,File,Line);
-    MessageBox(NULL,Msg,"Assertion failed.",MB_OK);
-    exit(1);
-}
-#define assert(e)   if (!e) Mesa_Assert(#e,__FILE__,__LINE__);
-#endif
-
-//#define DD_GETDC (Current->hDC )
-#define DD_GETDC ((Current->db_flag) ? Current->dib.hDC : Current->hDC )
-//#define DD_GETDC ((Current->db_flag) ? Current->hDCPrimary : Current->hDCBack )
-#define DD_RELEASEDC
-
-//#define BEGINGDICALL  if(Current->rgb_flag)wmFlushBits(Current);
-#define BEGINGDICALL
-//#define ENDGDICALL        if(Current->rgb_flag)wmGetBits(Current);
-#define ENDGDICALL
-
-//#define FLIP(Y)  (Current->dither_flag? Y : Current->height-(Y)-1)
-//#define FLIP(Y)  (Current->height-(Y)-1)
-//#define FLIP(Y) Y
-/*
- * XXX Why only flip Y coord if single buffered???
- */
-#define FLIP(Y)  (Current->db_flag? Y: Current->height-(Y)-1)
-#define STARTPROFILE
-#define ENDPROFILE(PARA)
-
-#define DITHER_RGB_TO_8BIT_SETUP            \
-GLubyte pixelDithered;
-
-#define DITHER_RGB_TO_8BIT(red, green, blue, pixel, scanline)               \
-{                                                                           \
-    char unsigned redtemp, greentemp, bluetemp, paletteindex;               \
-    redtemp = aDividedBy51[red]                                             \
-    + (aModulo51[red] > aHalftone8x8[(pixel%8)*8                        \
-    + scanline%8]);                                                 \
-    greentemp = aDividedBy51[(char unsigned)green]                          \
-    + (aModulo51[green] > aHalftone8x8[                             \
-    (pixel%8)*8 + scanline%8]);                                     \
-    bluetemp = aDividedBy51[(char unsigned)blue]                            \
-    + (aModulo51[blue] > aHalftone8x8[                              \
-    (pixel%8)*8 +scanline%8]);                                      \
-    paletteindex = redtemp + aTimes6[greentemp] + aTimes36[bluetemp];       \
-    pixelDithered = aWinGHalftoneTranslation[paletteindex];                 \
-}
-
-
-#ifdef DDRAW
-static BOOL DDInit( WMesaContext wc, HWND hwnd);
-static void DDFree( WMesaContext wc);
-static HRESULT DDRestoreAll( WMesaContext wc );
-static void DDDeleteOffScreen(WMesaContext wc);
-static BOOL DDCreateOffScreen(WMesaContext wc);
-#endif
-
-static void FlushToFile(PWMC pwc, PSTR  szFile);
-
-BOOL wmCreateBackingStore(PWMC pwc, long lxSize, long lySize);
-BOOL wmDeleteBackingStore(PWMC pwc);
-void wmCreatePalette( PWMC pwdc );
-BOOL wmSetDibColors(PWMC pwc);
-void wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b);
-
-void wmCreateDIBSection(
-                        HDC  hDC,
-                        PWMC pwc,   // handle of device context
-                        CONST BITMAPINFO *pbmi, // address of structure containing bitmap size, format, and color data
-                        UINT iUsage // color data type indicator: RGB values or palette indices
-                        );
-
-
-void WMesaViewport( GLcontext *ctx,
-                    GLint x, GLint y, GLsizei width, GLsizei height );
-
-
-static triangle_func choose_triangle_function( GLcontext *ctx );
-
-
-static void wmSetPixelFormat( PWMC wc, HDC hDC)
-{
-    if(wc->rgb_flag)
-        wc->cColorBits = GetDeviceCaps(hDC, BITSPIXEL);
-    else
-        wc->cColorBits = 8;
-    switch(wc->cColorBits){
-    case 8:
-        if(wc->dither_flag != GL_TRUE)
-            wc->pixelformat = PF_INDEX8;
-        else
-            wc->pixelformat = PF_DITHER8;
-        break;
-    case 16:
-        wc->pixelformat = PF_5R6G5B;
-        break;
-    case 32:
-        wc->pixelformat = PF_8R8G8B;
-        break;
-    default:
-        wc->pixelformat = PF_BADFORMAT;
-    }
-}
-
-//
-// This function sets the color table of a DIB section
-// to match that of the destination DC
-//
-BOOL /*WINAPI*/ wmSetDibColors(PWMC pwc)
-{
-    RGBQUAD         *pColTab, *pRGB;
-    PALETTEENTRY    *pPal, *pPE;
-    int             i, nColors;
-    BOOL            bRet=TRUE;
-    DWORD           dwErr=0;
-
-    /* Build a color table in the DIB that maps to the
-    selected palette in the DC.
-    */
-    nColors = 1 << pwc->cColorBits;
-    pPal = (PALETTEENTRY *)malloc( nColors * sizeof(PALETTEENTRY));
-    memset( pPal, 0, nColors * sizeof(PALETTEENTRY) );
-    GetPaletteEntries( pwc->hGLPalette, 0, nColors, pPal );
-    pColTab = (RGBQUAD *)malloc( nColors * sizeof(RGBQUAD));
-    for (i = 0, pRGB = pColTab, pPE = pPal; i < nColors; i++, pRGB++, pPE++) {
-        pRGB->rgbRed = pPE->peRed;
-        pRGB->rgbGreen = pPE->peGreen;
-        pRGB->rgbBlue = pPE->peBlue;
-    }
-    if(pwc->db_flag)
-        bRet = SetDIBColorTable(pwc->dib.hDC, 0, nColors, pColTab );
-
-    if(!bRet)
-        dwErr = GetLastError();
-
-    free( pColTab );
-    free( pPal );
-
-    return(bRet);
-}
-
-
-//
-// Free up the dib section that was created
-//
-BOOL wmDeleteBackingStore(PWMC pwc)
-{
-    SelectObject(pwc->dib.hDC, pwc->hOldBitmap);
-    DeleteDC(pwc->dib.hDC);
-    DeleteObject(pwc->hbmDIB);
-    UnmapViewOfFile(pwc->dib.base);
-    CloseHandle(pwc->dib.hFileMap);
-    return TRUE;
-}
-
-
-//
-// This function creates the DIB section that is used for combined
-// GL and GDI calls
-//
-BOOL /*WINAPI*/ wmCreateBackingStore(PWMC pwc, long lxSize, long lySize)
-{
-    HDC hdc = pwc->hDC;
-    LPBITMAPINFO pbmi = &(pwc->bmi);
-    int     iUsage;
-
-    pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
-    pbmi->bmiHeader.biWidth = lxSize;
-    pbmi->bmiHeader.biHeight= -lySize;
-    pbmi->bmiHeader.biPlanes = 1;
-    if(pwc->rgb_flag)
-        pbmi->bmiHeader.biBitCount = GetDeviceCaps(pwc->hDC, BITSPIXEL);
-    else
-        pbmi->bmiHeader.biBitCount = 8;
-    pbmi->bmiHeader.biCompression = BI_RGB;
-    pbmi->bmiHeader.biSizeImage = 0;
-    pbmi->bmiHeader.biXPelsPerMeter = 0;
-    pbmi->bmiHeader.biYPelsPerMeter = 0;
-    pbmi->bmiHeader.biClrUsed = 0;
-    pbmi->bmiHeader.biClrImportant = 0;
-
-    iUsage = (pbmi->bmiHeader.biBitCount <= 8) ? DIB_PAL_COLORS : DIB_RGB_COLORS;
-
-    pwc->cColorBits = pbmi->bmiHeader.biBitCount;
-    pwc->ScanWidth = pwc->pitch = lxSize;
-
-    wmCreateDIBSection(hdc, pwc, pbmi, iUsage);
-
-    if ((iUsage == DIB_PAL_COLORS) && !(pwc->hGLPalette)) {
-        wmCreatePalette( pwc );
-        wmSetDibColors( pwc );
-    }
-    wmSetPixelFormat(pwc, pwc->hDC);
-    return(TRUE);
-
-}
-
-
-//
-// This function copies one scan line in a DIB section to another
-//
-BOOL WINAPI wmSetDIBits(PWMC pwc, UINT uiScanWidth, UINT uiNumScans, UINT nBypp, UINT uiNewWidth, LPBYTE pBits)
-{
-    UINT uiScans = 0;
-    LPBYTE  pDest = pwc->pbPixels;
-    DWORD   dwNextScan = uiScanWidth;
-    DWORD   dwNewScan = uiNewWidth;
-    DWORD   dwScanWidth = (uiScanWidth * nBypp);
-
-    //
-    // We need to round up to the nearest DWORD
-    // and multiply by the number of bytes per
-    // pixel
-    //
-    dwNextScan = (((dwNextScan * nBypp)+ 3) & ~3);
-    dwNewScan = (((dwNewScan * nBypp)+ 3) & ~3);
-
-    for(uiScans = 0; uiScans < uiNumScans; uiScans++){
-        CopyMemory(pDest, pBits, dwScanWidth);
-        pBits += dwNextScan;
-        pDest += dwNewScan;
-    }
-
-    return(TRUE);
-
-}
-
-
-BOOL wmFlush(PWMC pwc);
-
-/*
-* Useful macros:
-Modified from file osmesa.c
-*/
-
-
-#define PIXELADDR(X,Y)  ((GLubyte *)Current->pbPixels + (Current->height-Y-1)* Current->ScanWidth + (X)*nBypp)
-#define PIXELADDR1( X, Y )  \
-((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X))
-#define PIXELADDR2( X, Y )  \
-((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*2)
-#define PIXELADDR4( X, Y )  \
-((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*4)
-
-
-BYTE DITHER_RGB_2_8BIT( int r, int g, int b, int x, int y);
-
-/* Finish all pending operations and synchronize. */
-static void finish(GLcontext* ctx)
-{
-    /* No op */
-}
-
-
-//
-// We cache all gl draw routines until a flush is made
-//
-static void flush(GLcontext* ctx)
-{
-    STARTPROFILE
-        if((Current->rgb_flag /*&& !(Current->dib.fFlushed)*/&&!(Current->db_flag))
-            ||(!Current->rgb_flag))
-        {
-            wmFlush(Current);
-        }
-        ENDPROFILE(flush)
-
-}
-
-
-
-/*
-* Set the color index used to clear the color buffer.
-*/
-static void clear_index(GLcontext* ctx, GLuint index)
-{
-    STARTPROFILE
-        Current->clearpixel = index;
-    ENDPROFILE(clear_index)
-}
-
-
-
-/*
-* Set the color used to clear the color buffer.
-*/
-static void clear_color( GLcontext* ctx, const GLchan color[4] )
-{
-    STARTPROFILE
-        Current->clearpixel = RGB(color[0], color[1], color[2]);
-    ENDPROFILE(clear_color)
-}
-
-
-
-/*
-* Clear the specified region of the color buffer using the clear color
-* or index as specified by one of the two functions above.
-*/
-//static void clear(GLcontext* ctx,
-//                  GLboolean all,GLint x, GLint y, GLint width, GLint height )
-// TODO: I modified this function to match the prototype in
-//       dd.h. (swansma@geocities.com)
-
-static GLbitfield clear(GLcontext* ctx, GLbitfield mask,
-                  GLboolean all, GLint x, GLint y, GLint width, GLint height)
-{
-    DWORD   dwColor;
-    WORD    wColor;
-    BYTE    bColor;
-    LPDWORD lpdw = (LPDWORD)Current->pbPixels;
-    LPWORD  lpw = (LPWORD)Current->pbPixels;
-    LPBYTE  lpb = Current->pbPixels;
-    int     lines;
-
-    STARTPROFILE
-
-        if (all){
-            x=y=0;
-            width=Current->width;
-            height=Current->height;
-        }
-        if(Current->db_flag==GL_TRUE){
-            UINT    nBypp = Current->cColorBits / 8;
-            int     i = 0;
-            int     iSize = 0;
-
-            if(nBypp ==1 ){
-                /* Need rectification */
-                iSize = Current->width/4;
-                bColor  = BGR8(GetRValue(Current->clearpixel),
-                    GetGValue(Current->clearpixel),
-                    GetBValue(Current->clearpixel));
-                wColor  = MAKEWORD(bColor,bColor);
-                dwColor = MAKELONG(wColor, wColor);
-            }
-            if(nBypp == 2){
-                iSize = Current->width / 2;
-                wColor = BGR16(GetRValue(Current->clearpixel),
-                    GetGValue(Current->clearpixel),
-                    GetBValue(Current->clearpixel));
-                dwColor = MAKELONG(wColor, wColor);
-            }
-            else if(nBypp == 4){
-                iSize = Current->width;
-                dwColor = BGR32(GetRValue(Current->clearpixel),
-                    GetGValue(Current->clearpixel),
-                    GetBValue(Current->clearpixel));
-            }
-
-            while(i < iSize){
-                *lpdw = dwColor;
-                lpdw++;
-                i++;
-            }
-
-            //
-            // This is the 24bit case
-            //
-            if (nBypp == 3) {
-                iSize = Current->width *3/4;
-                dwColor = BGR24(GetRValue(Current->clearpixel),
-                    GetGValue(Current->clearpixel),
-                    GetBValue(Current->clearpixel));
-                while(i < iSize){
-                    *lpdw = dwColor;
-                    lpb += nBypp;
-                    lpdw = (LPDWORD)lpb;
-                    i++;
-                }
-            }
-
-            i = 0;
-            if (stereo_flag)
-               lines = height /2;
-            else
-               lines = height;
-            do {
-                memcpy(lpb, Current->pbPixels, iSize*4);
-                lpb += Current->ScanWidth;
-                i++;
-            }
-            while (i<lines-1);
-        }
-        else { // For single buffer
-            HDC DC=DD_GETDC;
-            HPEN Pen=CreatePen(PS_SOLID,1,Current->clearpixel);
-            HBRUSH Brush=CreateSolidBrush(Current->clearpixel);
-            HPEN Old_Pen=SelectObject(DC,Pen);
-            HBRUSH Old_Brush=SelectObject(DC,Brush);
-            Rectangle(DC,x,y,x+width,y+height);
-            SelectObject(DC,Old_Pen);
-            SelectObject(DC,Old_Brush);
-            DeleteObject(Pen);
-            DeleteObject(Brush);
-            DD_RELEASEDC;
-        }
-
-
-
-        ENDPROFILE(clear)
-
-		return mask;	// TODO: I doubt this is correct. dd.h doesn't explain what this should
-		                //       be...
-}
-
-
-
-static void enable( GLcontext* ctx, GLenum pname, GLboolean enable )
-{
-   if (!Current)
-      return;
-
-   if (pname == GL_DITHER) {
-      if(enable == GL_FALSE){
-         Current->dither_flag = GL_FALSE;
-         if(Current->cColorBits == 8)
-            Current->pixelformat = PF_INDEX8;
-      }
-      else{
-         if (Current->rgb_flag && Current->cColorBits == 8){
-            Current->pixelformat = PF_DITHER8;
-            Current->dither_flag = GL_TRUE;
-         }
-         else
-            Current->dither_flag = GL_FALSE;
-      }
-   }
-}
-
-
-
-static GLboolean set_draw_buffer( GLcontext* ctx, GLenum mode )
-{
-   STARTPROFILE
-   /* TODO: this could be better */
-   if (mode==GL_FRONT_LEFT || mode==GL_BACK_LEFT) {
-      return GL_TRUE;
-   }
-   else {
-      return GL_FALSE;
-   }
-   ENDPROFILE(set_draw_buffer)
-}
-
-
-static void set_read_buffer(GLcontext *ctx, GLframebuffer *colorBuffer,
-                            GLenum buffer )
-{
-   /* XXX todo */
-   return;
-}
-
-
-
-/* Return characteristics of the output buffer. */
-static void buffer_size( GLcontext* ctx, GLuint *width, GLuint *height )
-{
-   int New_Size;
-   RECT CR;
-
-   STARTPROFILE
-   GetClientRect(Current->Window,&CR);
-
-   *width=CR.right;
-   *height=CR.bottom;
-
-   New_Size=((*width)!=Current->width) || ((*height)!=Current->height);
-
-   if (New_Size){
-      Current->width=*width;
-      Current->height=*height;
-      Current->ScanWidth=Current->width;
-      if ((Current->ScanWidth%sizeof(long))!=0)
-         Current->ScanWidth+=(sizeof(long)-(Current->ScanWidth%sizeof(long)));
-
-      if (Current->db_flag){
-#ifdef DDRAW
-         DDDeleteOffScreen(Current);
-         DDCreateOffScreen(Current);
-#else
-         if (Current->rgb_flag==GL_TRUE && Current->dither_flag!=GL_TRUE){
-            wmDeleteBackingStore(Current);
-            wmCreateBackingStore(Current, Current->width, Current->height);
-         }
-#endif
-      }
-
-      //  Resize OsmesaBuffer if in Parallel mode
-#if !defined(NO_PARALLEL)
-      if(parallelFlag)
-         PRSizeRenderBuffer(Current->width, Current->height,Current->ScanWidth,
-                            Current->rgb_flag == GL_TRUE ? Current->pbPixels: Current->ScreenMem);
-#endif
-   }
-   ENDPROFILE(buffer_size)
-}
-
-
-
-/**********************************************************************/
-/*****           Accelerated point, line, polygon rendering       *****/
-/**********************************************************************/
-
-
-static void fast_rgb_points( GLcontext* ctx, GLuint first, GLuint last )
-{
-    GLuint i;
-    //  HDC DC=DD_GETDC;
-    PWMC    pwc = Current;
-
-    STARTPROFILE
-
-        if (0 /*Current->gl_ctx->VB->MonoColor*/) {
-            /* all drawn with current color */
-            for (i=first;i<=last;i++) {
-                if (!Current->gl_ctx->VB->ClipMask[i]) {
-                    int x, y;
-                    x =       (GLint) Current->gl_ctx->VB->Win.data[i][0];
-                    y = FLIP( (GLint) Current->gl_ctx->VB->Win.data[i][1] );
-                    wmSetPixel(pwc, y,x,GetRValue(Current->pixel),
-                        GetGValue(Current->pixel), GetBValue(Current->pixel));
-                }
-            }
-        }
-        else {
-            /* draw points of different colors */
-            for (i=first;i<=last;i++) {
-                if (!Current->gl_ctx->VB->ClipMask[i]) {
-                    int x, y;
-                    unsigned long pixel=RGB(Current->gl_ctx->VB->ColorPtr->data[i][0]*255.0,
-                        Current->gl_ctx->VB->ColorPtr->data[i][1]*255.0,
-                        Current->gl_ctx->VB->ColorPtr->data[i][2]*255.0);
-                    x =       (GLint) Current->gl_ctx->VB->Win.data[i][0];
-                    y = FLIP( (GLint) Current->gl_ctx->VB->Win.data[i][1] );
-                    wmSetPixel(pwc, y,x,Current->gl_ctx->VB->ColorPtr->data[i][0]*255.0,
-                        Current->gl_ctx->VB->ColorPtr->data[i][1]*255.0,
-                        Current->gl_ctx->VB->ColorPtr->data[i][2]*255.0);
-                }
-            }
-        }
-        //   DD_RELEASEDC;
-        ENDPROFILE(fast_rgb_points)
-}
-
-
-
-/* Return pointer to accerated points function */
-extern points_func choose_points_function( GLcontext* ctx )
-{
-    STARTPROFILE
-        if (ctx->Point.Size==1.0 && !ctx->Point.SmoothFlag && ctx->_RasterMask==0
-            && !ctx->Texture._ReallyEnabled  && ctx->Visual->RGBAflag) {
-            ENDPROFILE(choose_points_function)
-                return fast_rgb_points;
-        }
-        else {
-            ENDPROFILE(choose_points_function)
-                return NULL;
-        }
-}
-
-
-
-/* Draw a line using the color specified by Current->gl_ctx->VB->ColorPtr->data[pv] */
-static void fast_flat_rgb_line( GLcontext* ctx, GLuint v0, GLuint v1, GLuint pv )
-{
-    STARTPROFILE
-        int x0, y0, x1, y1;
-    unsigned long pixel;
-    HDC DC=DD_GETDC;
-    HPEN Pen;
-    HPEN Old_Pen;
-
-    if (0 /*Current->gl_ctx->VB->MonoColor*/) {
-        pixel = Current->pixel;  /* use current color */
-    }
-    else {
-        pixel = RGB(Current->gl_ctx->VB->ColorPtr->data[pv][0]*255.0, Current->gl_ctx->VB->ColorPtr->data[pv][1]*255.0, Current->gl_ctx->VB->ColorPtr->data[pv][2]*255.0);
-    }
-
-    x0 =       (int) Current->gl_ctx->VB->Win.data[v0][0];
-    y0 = FLIP( (int) Current->gl_ctx->VB->Win.data[v0][1] );
-    x1 =       (int) Current->gl_ctx->VB->Win.data[v1][0];
-    y1 = FLIP( (int) Current->gl_ctx->VB->Win.data[v1][1] );
-
-
-    BEGINGDICALL
-
-    Pen=CreatePen(PS_SOLID,1,pixel);
-    Old_Pen=SelectObject(DC,Pen);
-    MoveToEx(DC,x0,y0,NULL);
-    LineTo(DC,x1,y1);
-    SelectObject(DC,Old_Pen);
-    DeleteObject(Pen);
-    DD_RELEASEDC;
-
-    ENDGDICALL
-
-    ENDPROFILE(fast_flat_rgb_line)
-}
-
-
-
-/* Return pointer to accerated line function */
-static line_func choose_line_function( GLcontext* ctx )
-{
-    STARTPROFILE
-    if (ctx->Line.Width==1.0 && !ctx->Line.SmoothFlag && !ctx->Line.StippleFlag
-        && ctx->Light.ShadeModel==GL_FLAT && ctx->_RasterMask==0
-        && !ctx->Texture._ReallyEnabled && Current->rgb_flag) {
-       ENDPROFILE(choose_line_function)
-       return fast_flat_rgb_line;
-    }
-    else {
-       ENDPROFILE(choose_line_function)
-       return NULL;
-    }
-}
-
-
-/**********************************************************************/
-/*****                 Span-based pixel drawing                   *****/
-/**********************************************************************/
-
-
-/* Write a horizontal span of 32-bit color-index pixels with a boolean mask. */
-static void write_ci32_span( const GLcontext* ctx,
-                             GLuint n, GLint x, GLint y,
-                             const GLuint index[],
-                             const GLubyte mask[] )
-{
-    STARTPROFILE
-    GLuint i;
-    PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;
-    assert(Current->rgb_flag==GL_FALSE);
-    for (i=0; i<n; i++)
-        if (mask[i])
-            Mem[i]=index[i];
-    ENDPROFILE(write_ci32_span)
-}
-
-
-/* Write a horizontal span of 8-bit color-index pixels with a boolean mask. */
-static void write_ci8_span( const GLcontext* ctx,
-                            GLuint n, GLint x, GLint y,
-                            const GLubyte index[],
-                            const GLubyte mask[] )
-{
-    STARTPROFILE
-    GLuint i;
-    PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;
-    assert(Current->rgb_flag==GL_FALSE);
-    for (i=0; i<n; i++)
-        if (mask[i])
-            Mem[i]=index[i];
-    ENDPROFILE(write_ci8_span)
-}
-
-
-
-/*
-* Write a horizontal span of pixels with a boolean mask.  The current
-* color index is used for all pixels.
-*/
-static void write_mono_ci_span(const GLcontext* ctx,
-                               GLuint n,GLint x,GLint y,
-                               GLuint colorIndex, const GLubyte mask[])
-{
-   STARTPROFILE
-   GLuint i;
-   BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;
-   assert(Current->rgb_flag==GL_FALSE);
-   for (i=0; i<n; i++)
-      if (mask[i])
-         Mem[i]=colorIndex;
-   ENDPROFILE(write_mono_ci_span)
-}
-
-/*
- * To improve the performance of this routine, frob the data into an actual
- * scanline and call bitblt on the complete scan line instead of SetPixel.
- */
-
-/* Write a horizontal span of RGBA color pixels with a boolean mask. */
-static void write_rgba_span( const GLcontext* ctx, GLuint n, GLint x, GLint y,
-                             const GLubyte rgba[][4], const GLubyte mask[] )
-{
-    STARTPROFILE
-    PWMC    pwc = Current;
-
-    if (pwc->rgb_flag==GL_TRUE)
-    {
-        GLuint i;
-        HDC DC=DD_GETDC;
-        y=FLIP(y);
-        if (mask) {
-            for (i=0; i<n; i++)
-                if (mask[i])
-                    wmSetPixel(pwc, y, x + i, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
-        }
-        else {
-            for (i=0; i<n; i++)
-                wmSetPixel(pwc, y, x + i, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] );
-        }
-        DD_RELEASEDC;
-    }
-    else
-    {
-        GLuint i;
-        BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x;
-        y = FLIP(y);
-        if (mask) {
-            for (i=0; i<n; i++)
-                if (mask[i])
-                    Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));
-        }
-        else {
-            for (i=0; i<n; i++)
-                Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));
-        }
-    }
-    ENDPROFILE(write_rgba_span)
-
-}
-
-/* Write a horizontal span of RGB color pixels with a boolean mask. */
-static void write_rgb_span( const GLcontext* ctx,
-                            GLuint n, GLint x, GLint y,
-                            const GLubyte rgb[][3], const GLubyte mask[] )
-{
-    STARTPROFILE
-    PWMC    pwc = Current;
-
-    if (pwc->rgb_flag==GL_TRUE)
-    {
-        GLuint i;
-        HDC DC=DD_GETDC;
-        y=FLIP(y);
-        if (mask) {
-            for (i=0; i<n; i++)
-                if (mask[i])
-                    wmSetPixel(pwc, y, x + i, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]);
-        }
-        else {
-            for (i=0; i<n; i++)
-                wmSetPixel(pwc, y, x + i, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] );
-        }
-        DD_RELEASEDC;
-    }
-    else
-    {
-        GLuint i;
-        BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x;
-        y = FLIP(y);
-        if (mask) {
-            for (i=0; i<n; i++)
-                if (mask[i])
-                    Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]));
-        }
-        else {
-            for (i=0; i<n; i++)
-                Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]));
-        }
-    }
-    ENDPROFILE(write_rgb_span)
-
-}
-
-/*
-* Write a horizontal span of pixels with a boolean mask.  The current color
-* is used for all pixels.
-*/
-static void write_mono_rgba_span( const GLcontext* ctx,
-                                  GLuint n, GLint x, GLint y,
-                                  const GLchan color[4], const GLubyte mask[])
-{
-    ULONG pixel =  RGB( color[RCOMP], color[GCOMP], color[BCOMP] );
-    STARTPROFILE
-    GLuint i;
-    HDC DC=DD_GETDC;
-    PWMC pwc = Current;
-    assert(Current->rgb_flag==GL_TRUE);
-    y=FLIP(y);
-    if(Current->rgb_flag==GL_TRUE){
-        for (i=0; i<n; i++)
-            if (mask[i])
-                // Trying
-                wmSetPixel(pwc,y,x+i,color[RCOMP], color[GCOMP], color[BCOMP]);
-    }
-    else {
-        for (i=0; i<n; i++)
-            if (mask[i])
-                SetPixel(DC, y, x+i, pixel);
-    }
-    DD_RELEASEDC;
-    ENDPROFILE(write_mono_rgba_span)
-}
-
-
-
-/**********************************************************************/
-/*****                   Array-based pixel drawing                *****/
-/**********************************************************************/
-
-
-/* Write an array of 32-bit index pixels with a boolean mask. */
-static void write_ci32_pixels( const GLcontext* ctx,
-                               GLuint n, const GLint x[], const GLint y[],
-                               const GLuint index[], const GLubyte mask[] )
-{
-   STARTPROFILE
-   GLuint i;
-   assert(Current->rgb_flag==GL_FALSE);
-   for (i=0; i<n; i++) {
-      if (mask[i]) {
-         BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i];
-         *Mem = index[i];
-      }
-   }
-   ENDPROFILE(write_ci32_pixels)
-}
-
-
-
-/*
-* Write an array of pixels with a boolean mask.  The current color
-* index is used for all pixels.
-*/
-static void write_mono_ci_pixels( const GLcontext* ctx,
-                                  GLuint n,
-                                  const GLint x[], const GLint y[],
-                                  GLuint colorIndex, const GLubyte mask[] )
-{
-   STARTPROFILE
-   GLuint i;
-   assert(Current->rgb_flag==GL_FALSE);
-   for (i=0; i<n; i++) {
-      if (mask[i]) {
-         BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i];
-         *Mem = colorIndex;
-      }
-   }
-   ENDPROFILE(write_mono_ci_pixels)
-}
-
-
-
-/* Write an array of RGBA pixels with a boolean mask. */
-static void write_rgba_pixels( const GLcontext* ctx,
-                               GLuint n, const GLint x[], const GLint y[],
-                               const GLubyte rgba[][4], const GLubyte mask[] )
-{
-    STARTPROFILE
-        GLuint i;
-    PWMC    pwc = Current;
-    HDC DC=DD_GETDC;
-    assert(Current->rgb_flag==GL_TRUE);
-    for (i=0; i<n; i++)
-       if (mask[i])
-          wmSetPixel(pwc, FLIP(y[i]), x[i],
-                     rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
-    DD_RELEASEDC;
-    ENDPROFILE(write_rgba_pixels)
-}
-
-
-
-/*
-* Write an array of pixels with a boolean mask.  The current color
-* is used for all pixels.
-*/
-static void write_mono_rgba_pixels( const GLcontext* ctx,
-                                    GLuint n,
-                                    const GLint x[], const GLint y[],
-                                    const GLchan color[4],
-                                    const GLubyte mask[] )
-{
-    STARTPROFILE
-    GLuint i;
-    PWMC    pwc = Current;
-    HDC DC=DD_GETDC;
-    assert(Current->rgb_flag==GL_TRUE);
-    for (i=0; i<n; i++)
-        if (mask[i])
-            wmSetPixel(pwc, FLIP(y[i]),x[i],color[RCOMP],
-                       color[GCOMP], color[BCOMP]);
-    DD_RELEASEDC;
-    ENDPROFILE(write_mono_rgba_pixels)
-}
-
-
-
-/**********************************************************************/
-/*****            Read spans/arrays of pixels                     *****/
-/**********************************************************************/
-
-
-/* Read a horizontal span of color-index pixels. */
-static void read_ci32_span( const GLcontext* ctx, GLuint n, GLint x, GLint y,
-                            GLuint index[])
-{
-   STARTPROFILE
-   GLuint i;
-   BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;
-   assert(Current->rgb_flag==GL_FALSE);
-   for (i=0; i<n; i++)
-      index[i]=Mem[i];
-   ENDPROFILE(read_ci32_span)
-}
-
-
-
-
-/* Read an array of color index pixels. */
-static void read_ci32_pixels( const GLcontext* ctx,
-                              GLuint n, const GLint x[], const GLint y[],
-                              GLuint indx[], const GLubyte mask[] )
-{
-   STARTPROFILE
-   GLuint i;
-   assert(Current->rgb_flag==GL_FALSE);
-   for (i=0; i<n; i++) {
-      if (mask[i]) {
-         indx[i]=*(Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i]);
-      }
-   }
-   ENDPROFILE(read_ci32_pixels)
-}
-
-
-
-/* Read a horizontal span of color pixels. */
-static void read_rgba_span( const GLcontext* ctx,
-                            GLuint n, GLint x, GLint y,
-                            GLubyte rgba[][4] )
-{
-   STARTPROFILE
-   UINT i;
-   COLORREF Color;
-   HDC DC=DD_GETDC;
-   assert(Current->rgb_flag==GL_TRUE);
-   /*   y=FLIP(y);*/
-   y = Current->height - y - 1;
-   for (i=0; i<n; i++) {
-      Color=GetPixel(DC,x+i,y);
-      rgba[i][RCOMP] = GetRValue(Color);
-      rgba[i][GCOMP] = GetGValue(Color);
-      rgba[i][BCOMP] = GetBValue(Color);
-      rgba[i][ACOMP] = 255;
-   }
-   DD_RELEASEDC;
-// Brian P. Has mentioned to comment this out.
-//   memset(alpha,0,n*sizeof(GLubyte));
-   ENDPROFILE(read_rgba_span)
-}
-
-
-/* Read an array of color pixels. */
-static void read_rgba_pixels( const GLcontext* ctx,
-                              GLuint n, const GLint x[], const GLint y[],
-                              GLubyte rgba[][4], const GLubyte mask[] )
-{
-   STARTPROFILE
-   GLuint i;
-   COLORREF Color;
-   HDC DC=DD_GETDC;
-   assert(Current->rgb_flag==GL_TRUE);
-   for (i=0; i<n; i++) {
-      if (mask[i]) {
-         GLint y2 = Current->height - y[i] - 1;
-         Color=GetPixel(DC,x[i],y2);
-         rgba[i][RCOMP] = GetRValue(Color);
-         rgba[i][GCOMP] = GetGValue(Color);
-         rgba[i][BCOMP] = GetBValue(Color);
-         rgba[i][ACOMP] = 255;
-      }
-   }
-   DD_RELEASEDC;
-// Brian P. has mentioned to comment this out.
-//   memset(alpha,0,n*sizeof(GLint));
-   ENDPROFILE(read_rgba_pixels)
-}
-
-
-
-/**********************************************************************/
-/**********************************************************************/
-
-
-static const GLubyte *get_string(GLcontext *ctx, GLenum name)
-{
-   if (name == GL_RENDERER) {
-      return (GLubyte *) "Mesa Windows";
-   }
-   else {
-      return NULL;
-   }
-}
-
-
-
-void setup_DD_pointers( GLcontext* ctx )
-{
-    ctx->Driver.GetString = get_string;
-    ctx->Driver.UpdateState = setup_DD_pointers;
-    ctx->Driver.GetBufferSize = buffer_size;
-    ctx->Driver.Finish = finish;
-    ctx->Driver.Flush = flush;
-
-    ctx->Driver.ClearIndex = clear_index;
-    ctx->Driver.ClearColor = clear_color;
-    ctx->Driver.Clear = clear;
-
-    ctx->Driver.Enable = enable;
-
-    ctx->Driver.SetDrawBuffer = set_draw_buffer;
-    ctx->Driver.SetReadBuffer = set_read_buffer;
-    ctx->Driver.GetBufferSize = buffer_size;
-
-    ctx->Driver.PointsFunc = choose_points_function(ctx);
-    ctx->Driver.LineFunc = choose_line_function(ctx);
-    ctx->Driver.TriangleFunc = choose_triangle_function( ctx );
-
-    /* Pixel/span writing functions: */
-	ctx->Driver.WriteRGBASpan        = write_rgba_span;
-    ctx->Driver.WriteRGBSpan         = write_rgb_span;
-    ctx->Driver.WriteMonoRGBASpan    = write_mono_rgba_span;
-    ctx->Driver.WriteRGBAPixels      = write_rgba_pixels;
-    ctx->Driver.WriteMonoRGBAPixels  = write_mono_rgba_pixels;
-    ctx->Driver.WriteCI32Span        = write_ci32_span;
-    ctx->Driver.WriteCI8Span         = write_ci8_span;
-    ctx->Driver.WriteMonoCISpan      = write_mono_ci_span;
-    ctx->Driver.WriteCI32Pixels      = write_ci32_pixels;
-    ctx->Driver.WriteMonoCIPixels    = write_mono_ci_pixels;
-
-    ctx->Driver.ReadCI32Span        = read_ci32_span;
-    ctx->Driver.ReadRGBASpan        = read_rgba_span;
-    ctx->Driver.ReadCI32Pixels      = read_ci32_pixels;
-    ctx->Driver.ReadRGBAPixels      = read_rgba_pixels;
-}
-
-
-/**********************************************************************/
-/*****                  WMesa API Functions                       *****/
-/**********************************************************************/
-
-
-
-#define PAL_SIZE 256
-static void GetPalette(HPALETTE Pal,RGBQUAD *aRGB)
-{
-    STARTPROFILE
-        int i;
-    HDC hdc;
-    struct
-    {
-        WORD Version;
-        WORD NumberOfEntries;
-        PALETTEENTRY aEntries[PAL_SIZE];
-    } Palette =
-    {
-        0x300,
-            PAL_SIZE
-    };
-    hdc=GetDC(NULL);
-    if (Pal!=NULL)
-        GetPaletteEntries(Pal,0,PAL_SIZE,Palette.aEntries);
-    else
-        GetSystemPaletteEntries(hdc,0,PAL_SIZE,Palette.aEntries);
-    if (GetSystemPaletteUse(hdc) == SYSPAL_NOSTATIC)
-    {
-        for(i = 0; i <PAL_SIZE; i++)
-            Palette.aEntries[i].peFlags = PC_RESERVED;
-        Palette.aEntries[255].peRed = 255;
-        Palette.aEntries[255].peGreen = 255;
-        Palette.aEntries[255].peBlue = 255;
-        Palette.aEntries[255].peFlags = 0;
-        Palette.aEntries[0].peRed = 0;
-        Palette.aEntries[0].peGreen = 0;
-        Palette.aEntries[0].peBlue = 0;
-        Palette.aEntries[0].peFlags = 0;
-    }
-    else
-    {
-        int nStaticColors;
-        int nUsableColors;
-        nStaticColors = GetDeviceCaps(hdc, NUMCOLORS)/2;
-        for (i=0; i<nStaticColors; i++)
-            Palette.aEntries[i].peFlags = 0;
-        nUsableColors = PAL_SIZE-nStaticColors;
-        for (; i<nUsableColors; i++)
-            Palette.aEntries[i].peFlags = PC_RESERVED;
-        for (; i<PAL_SIZE-nStaticColors; i++)
-            Palette.aEntries[i].peFlags = PC_RESERVED;
-        for (i=PAL_SIZE-nStaticColors; i<PAL_SIZE; i++)
-            Palette.aEntries[i].peFlags = 0;
-    }
-    ReleaseDC(NULL,hdc);
-    for (i=0; i<PAL_SIZE; i++)
-    {
-        aRGB[i].rgbRed=Palette.aEntries[i].peRed;
-        aRGB[i].rgbGreen=Palette.aEntries[i].peGreen;
-        aRGB[i].rgbBlue=Palette.aEntries[i].peBlue;
-        aRGB[i].rgbReserved=Palette.aEntries[i].peFlags;
-    }
-    ENDPROFILE(GetPalette)
-}
-
-
-WMesaContext WMesaCreateContext( HWND hWnd, HPALETTE* Pal,
-                                GLboolean rgb_flag,
-                                GLboolean db_flag )
-{
-    RECT CR;
-    WMesaContext c;
-    GLboolean true_color_flag;
-    c = (struct wmesa_context * ) calloc(1,sizeof(struct wmesa_context));
-    if (!c)
-        return NULL;
-
-    c->Window=hWnd;
-    c->hDC = GetDC(hWnd);
-    true_color_flag = GetDeviceCaps(c->hDC, BITSPIXEL) > 8;
-#ifdef DDRAW
-    if(true_color_flag) c->rgb_flag = rgb_flag = GL_TRUE;
-#endif
-
-
-#ifdef DITHER
-    if ((true_color_flag==GL_FALSE) && (rgb_flag == GL_TRUE)){
-        c->dither_flag = GL_TRUE;
-        c->hPalHalfTone = WinGCreateHalftonePalette();
-    }
-    else
-        c->dither_flag = GL_FALSE;
-#else
-    c->dither_flag = GL_FALSE;
-#endif
-
-
-    if (rgb_flag==GL_FALSE)
-    {
-        c->rgb_flag = GL_FALSE;
-        //    c->pixel = 1;
-        c->db_flag = db_flag =GL_TRUE; // WinG requires double buffering
-        printf("Single buffer is not supported in color index mode, setting to double buffer.\n");
-    }
-    else
-    {
-        c->rgb_flag = GL_TRUE;
-        //    c->pixel = 0;
-    }
-    GetClientRect(c->Window,&CR);
-    c->width=CR.right;
-    c->height=CR.bottom;
-    if (db_flag)
-    {
-        c->db_flag = 1;
-        /* Double buffered */
-#ifndef DDRAW
-        //  if (c->rgb_flag==GL_TRUE && c->dither_flag != GL_TRUE )
-        {
-            wmCreateBackingStore(c, c->width, c->height);
-
-        }
-#endif
-    }
-    else
-    {
-        /* Single Buffered */
-        if (c->rgb_flag)
-            c->db_flag = 0;
-    }
-#ifdef DDRAW
-    if (DDInit(c,hWnd) == GL_FALSE) {
-        free( (void *) c );
-        exit(1);
-    }
-#endif
-
-
-    c->gl_visual = _mesa_create_visual(rgb_flag,
-                                       db_flag,    /* db_flag */
-                                       GL_FALSE,   /* stereo */
-                                       8,8,8,8,    /* r, g, b, a bits */
-                                       0,          /* index bits */
-                                       16,         /* depth_bits */
-                                       8,          /* stencil_bits */
-                                       16,16,16,16,/* accum_bits */
-                                       1);
-
-    if (!c->gl_visual) {
-        return NULL;
-    }
-
-    /* allocate a new Mesa context */
-    c->gl_ctx = _mesa_create_context( c->gl_visual, NULL, c, GL_TRUE);
-
-    if (!c->gl_ctx) {
-        _mesa_destroy_visual( c->gl_visual );
-        free(c);
-        return NULL;
-    }
-
-    _mesa_enable_sw_extensions(c->gl_ctx);
-
-    c->gl_buffer = _mesa_create_framebuffer( c->gl_visual,
-                                          c->gl_visual->DepthBits > 0,
-                                          c->gl_visual->StencilBits > 0,
-                                          c->gl_visual->AccumRedBits > 0,
-                                          c->gl_visual->AlphaBits > 0 );
-    if (!c->gl_buffer) {
-        _mesa_destroy_visual( c->gl_visual );
-        _mesa_destroy_context( c->gl_ctx );
-        free(c);
-        return NULL;
-    }
-
-	c->gl_ctx->Driver.UpdateState = setup_DD_pointers;
-
-    //  setup_DD_pointers(c->gl_ctx);
-
-    return c;
-}
-
-void WMesaDestroyContext( void )
-{
-    WMesaContext c = Current;
-    ReleaseDC(c->Window,c->hDC);
-    WC = c;
-    if(c->hPalHalfTone != NULL)
-        DeleteObject(c->hPalHalfTone);
-    _mesa_destroy_visual( c->gl_visual );
-    _mesa_destroy_framebuffer( c->gl_buffer );
-    _mesa_destroy_context( c->gl_ctx );
-
-    if (c->db_flag)
-#ifdef DDRAW
-        DDFree(c);
-#else
-    wmDeleteBackingStore(c);
-#endif
-    free( (void *) c );
-    //Following code is added to enable parallel render
-    // Parallel render only work in double buffer mode
-#if !defined(NO_PARALLEL)
-    if(parallelMachine)
-        PRDestroyRenderBuffer();
-#endif
-    // End modification
-}
-
-
-
-void /*APIENTRY*/ WMesaMakeCurrent( WMesaContext c )
-{
-    if(!c){
-        Current = c;
-        return;
-    }
-
-    //
-    // A little optimization
-    // If it already is current,
-    // don't set it again
-    //
-    if(Current == c)
-        return;
-
-    //gl_set_context( c->gl_ctx );
-    _mesa_make_current(c->gl_ctx, c->gl_buffer);
-    setup_DD_pointers(c->gl_ctx);
-    Current = c;
-    if (Current->gl_ctx->Viewport.Width==0) {
-        /* initialize viewport to window size */
-        _mesa_set_viewport( Current->gl_ctx,
-            0, 0, Current->width, Current->height );
-    }
-    if ((c->cColorBits <= 8 ) && (c->rgb_flag == GL_TRUE)){
-        WMesaPaletteChange(c->hPalHalfTone);
-    }
-}
-
-
-
-void /*APIENTRY*/ WMesaSwapBuffers( void )
-{
-    HDC DC = Current->hDC;
-    GET_CURRENT_CONTEXT(ctx);
-
-    /* If we're swapping the buffer associated with the current context
-     * we have to flush any pending rendering commands first.
-    */
-    if (Current && Current->gl_ctx == ctx)
-       _mesa_swapbuffers(ctx);
-
-    if (Current->db_flag)
-        wmFlush(Current);
-}
-
-
-
-void /*APIENTRY*/ WMesaPaletteChange(HPALETTE Pal)
-{
-    int vRet;
-    LPPALETTEENTRY pPal;
-    if (Current && (Current->rgb_flag==GL_FALSE || Current->dither_flag == GL_TRUE))
-    {
-        pPal = (PALETTEENTRY *)malloc( 256 * sizeof(PALETTEENTRY));
-        Current->hPal=Pal;
-        //  GetPaletteEntries( Pal, 0, 256, pPal );
-        GetPalette( Pal, pPal );
-#ifdef DDRAW
-        Current->lpDD->lpVtbl->CreatePalette(Current->lpDD,DDPCAPS_8BIT,
-            pPal, &(Current->lpDDPal), NULL);
-        if (Current->lpDDPal)
-            Current->lpDDSPrimary->lpVtbl->SetPalette(Current->lpDDSPrimary,Current->lpDDPal);
-#else
-        vRet = SetDIBColorTable(Current->dib.hDC,0,256,pPal);
-#endif
-        free( pPal );
-    }
-
-}
-
-
-
-
-static unsigned char threeto8[8] = {
-    0, 0111>>1, 0222>>1, 0333>>1, 0444>>1, 0555>>1, 0666>>1, 0377
-};
-
-static unsigned char twoto8[4] = {
-    0, 0x55, 0xaa, 0xff
-};
-
-static unsigned char oneto8[2] = {
-    0, 255
-};
-
-static unsigned char componentFromIndex(UCHAR i, UINT nbits, UINT shift)
-{
-    unsigned char val;
-
-    val = i >> shift;
-    switch (nbits) {
-
-    case 1:
-        val &= 0x1;
-        return oneto8[val];
-
-    case 2:
-        val &= 0x3;
-        return twoto8[val];
-
-    case 3:
-        val &= 0x7;
-        return threeto8[val];
-
-    default:
-        return 0;
-    }
-}
-
-void /*WINAPI*/ wmCreatePalette( PWMC pwdc )
-{
-    /* Create a compressed and re-expanded 3:3:2 palette */
-    int            i;
-    LOGPALETTE     *pPal;
-    BYTE           rb, rs, gb, gs, bb, bs;
-
-    pwdc->nColors = 0x100;
-
-    pPal = (PLOGPALETTE)malloc(sizeof(LOGPALETTE) + pwdc->nColors * sizeof(PALETTEENTRY));
-    memset( pPal, 0, sizeof(LOGPALETTE) + pwdc->nColors * sizeof(PALETTEENTRY) );
-
-    pPal->palVersion = 0x300;
-
-    rb = REDBITS;
-    rs = REDSHIFT;
-    gb = GREENBITS;
-    gs = GREENSHIFT;
-    bb = BLUEBITS;
-    bs = BLUESHIFT;
-
-    if (pwdc->db_flag) {
-
-        /* Need to make two palettes: one for the screen DC and one for the DIB. */
-        pPal->palNumEntries = pwdc->nColors;
-        for (i = 0; i < pwdc->nColors; i++) {
-            pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs );
-            pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs );
-            pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs );
-            pPal->palPalEntry[i].peFlags = 0;
-        }
-        pwdc->hGLPalette = CreatePalette( pPal );
-        pwdc->hPalette = CreatePalette( pPal );
-    }
-
-    else {
-        pPal->palNumEntries = pwdc->nColors;
-        for (i = 0; i < pwdc->nColors; i++) {
-            pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs );
-            pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs );
-            pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs );
-            pPal->palPalEntry[i].peFlags = 0;
-        }
-        pwdc->hGLPalette = CreatePalette( pPal );
-    }
-
-    free(pPal);
-
-}
-
-void /*WINAPI*/ wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b)
-{
-    if (Current->db_flag) {
-        LPBYTE  lpb = pwc->pbPixels;
-        LPDWORD lpdw;
-        LPWORD  lpw;
-        UINT    nBypp = pwc->cColorBits >> 3;
-        UINT    nOffset = iPixel % nBypp;
-
-        // Move the pixel buffer pointer to the scanline that we
-        // want to access
-
-        //      pwc->dib.fFlushed = FALSE;
-
-        lpb += pwc->ScanWidth * iScanLine;
-        // Now move to the desired pixel
-        lpb += iPixel * nBypp;
-        lpb = PIXELADDR(iPixel, iScanLine);
-        lpdw = (LPDWORD)lpb;
-        lpw = (LPWORD)lpb;
-
-        if(nBypp == 1){
-            if(pwc->dither_flag)
-                *lpb = DITHER_RGB_2_8BIT(r,g,b,iScanLine,iPixel);
-            else
-                *lpb = BGR8(r,g,b);
-        }
-        else if(nBypp == 2)
-            *lpw = BGR16(r,g,b);
-        else if (nBypp == 3){
-            *lpdw = BGR24(r,g,b);
-        }
-        else if (nBypp == 4)
-            *lpdw = BGR32(r,g,b);
-    }
-    else{
-        SetPixel(Current->hDC, iPixel, iScanLine, RGB(r,g,b));
-        DD_RELEASEDC;
-    }
-}
-
-void /*WINAPI*/ wmCreateDIBSection(
-                                   HDC   hDC,
-                                   PWMC pwc,    // handle of device context
-                                   CONST BITMAPINFO *pbmi,  // address of structure containing bitmap size, format, and color data
-                                   UINT iUsage  // color data type indicator: RGB values or palette indices
-                                   )
-{
-    DWORD   dwSize = 0;
-    DWORD   dwScanWidth;
-    UINT    nBypp = pwc->cColorBits / 8;
-    HDC     hic;
-
-    dwScanWidth = (((pwc->ScanWidth * nBypp)+ 3) & ~3);
-
-    pwc->ScanWidth =pwc->pitch = dwScanWidth;
-
-    if (stereo_flag)
-        pwc->ScanWidth = 2* pwc->pitch;
-
-    dwSize = sizeof(BITMAPINFO) + (dwScanWidth * pwc->height);
-
-    pwc->dib.hFileMap = CreateFileMapping((HANDLE)PAGE_FILE,
-        NULL,
-        PAGE_READWRITE | SEC_COMMIT,
-        0,
-        dwSize,
-        NULL);
-
-    if (!pwc->dib.hFileMap)
-        return;
-
-    pwc->dib.base = MapViewOfFile(pwc->dib.hFileMap,
-        FILE_MAP_ALL_ACCESS,
-        0,
-        0,
-        0);
-
-    if(!pwc->dib.base){
-        CloseHandle(pwc->dib.hFileMap);
-        return;
-    }
-
-    //  pwc->pbPixels = pwc->addrOffScreen = ((LPBYTE)pwc->dib.base) + sizeof(BITMAPINFO);
-
-    //  pwc->dib.hDC = CreateCompatibleDC(hDC);
-
-    CopyMemory(pwc->dib.base, pbmi, sizeof(BITMAPINFO));
-
-    hic = CreateIC("display", NULL, NULL, NULL);
-    pwc->dib.hDC = CreateCompatibleDC(hic);
-
-
-    /*  pwc->hbmDIB = CreateDIBitmap(hic,
-    &(pwc->bmi.bmiHeader),
-    CBM_INIT,
-    pwc->pbPixels,
-    &(pwc->bmi),
-    DIB_RGB_COLORS);
-    */
-    pwc->hbmDIB = CreateDIBSection(hic,
-        &(pwc->bmi),
-        (iUsage ? DIB_PAL_COLORS : DIB_RGB_COLORS),
-        &(pwc->pbPixels),
-        pwc->dib.hFileMap,
-        0);
-        /*
-        pwc->hbmDIB = CreateDIBSection(hic,
-        &(pwc->bmi),
-        DIB_RGB_COLORS,
-        &(pwc->pbPixels),
-        pwc->dib.hFileMap,
-        0);
-    */
-    pwc->ScreenMem = pwc->addrOffScreen = pwc->pbPixels;
-    pwc->hOldBitmap = SelectObject(pwc->dib.hDC, pwc->hbmDIB);
-
-    DeleteDC(hic);
-
-    return;
-
-}
-
-//
-// Blit memory DC to screen DC
-//
-BOOL /*WINAPI*/ wmFlush(PWMC pwc)
-{
-    BOOL    bRet = 0;
-    DWORD   dwErr = 0;
-#ifdef DDRAW
-    HRESULT             ddrval;
-#endif
-
-    // Now search through the torus frames and mark used colors
-    if(pwc->db_flag){
-#ifdef DDRAW
-        if (pwc->lpDDSOffScreen == NULL)
-            if(DDCreateOffScreen(pwc) == GL_FALSE)
-                return;
-
-            pwc->lpDDSOffScreen->lpVtbl->Unlock(pwc->lpDDSOffScreen, NULL);
-
-            while( 1 )
-            {
-                ddrval = pwc->lpDDSPrimary->lpVtbl->Blt( pwc->lpDDSPrimary,
-                    &(pwc->rectSurface), pwc->lpDDSOffScreen, &(pwc->rectOffScreen), 0, NULL );
-
-                if( ddrval == DD_OK )
-                {
-                    break;
-                }
-                if( ddrval == DDERR_SURFACELOST )
-                {
-                    if(!DDRestoreAll(pwc))
-                    {
-                        break;
-                    }
-                }
-                if( ddrval != DDERR_WASSTILLDRAWING )
-                {
-                    break;
-                }
-            }
-
-            while (pwc->lpDDSOffScreen->lpVtbl->Lock(pwc->lpDDSOffScreen,
-                NULL, &(pwc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)
-                ;
-
-            if(ddrval != DD_OK)
-                dwErr = GetLastError();
-#else
-            bRet = BitBlt(pwc->hDC, 0, 0, pwc->width, pwc->height,
-                pwc->dib.hDC, 0, 0, SRCCOPY);
-#endif
-    }
-
-    return(TRUE);
-
-}
-
-
-// The following code is added by Li Wei to enable stereo display
-
-#if !defined(NO_STEREO)
-
-void WMesaShowStereo(GLuint list)
-{
-
-    GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
-    GLfloat cm[16];
-    GLint matrix_mode;
-    // Must use double Buffer
-    if( ! Current-> db_flag )
-        return;
-
-
-    glGetIntegerv(GL_MATRIX_MODE,&matrix_mode);
-
-    //  glPushMatrix();  //****
-    WMesaViewport(Current->gl_ctx,0,Current->height/2,Current->width,Current->height/2);
-    //  Current->gl_ctx->NewState = 0;
-
-    //  glViewport(0,0,Current->width,Current->height/2);
-    if(matrix_mode!=GL_MODELVIEW)
-        glMatrixMode(GL_MODELVIEW);
-
-    glGetFloatv(GL_MODELVIEW_MATRIX,cm);
-    glLoadIdentity();
-    gluLookAt(viewDistance/2,0.0,0.0 ,
-        viewDistance/2,0.0,-1.0,
-        0.0,1.0,0.0 );
-    //  glTranslatef(viewDistance/2.0,0.,0.);
-    glMultMatrixf( cm );
-
-    Current->ScreenMem = Current->pbPixels = Current->addrOffScreen;
-    //glPushMatrix();
-    glCallList( list );
-    //glPopMatrix();
-
-    glGetFloatv(GL_MODELVIEW_MATRIX,cm);
-    glLoadIdentity();
-    gluLookAt(-viewDistance/2,0.0,0.0 ,
-        -viewDistance/2,0.0,-1.0,
-        0.0,1.0,0.0 );
-    //  glTranslatef(-viewDistance/2.0,0.,0.);
-    glMultMatrixf(cm);
-
-    Current->ScreenMem = Current->pbPixels = Current->addrOffScreen + Current->pitch;
-    glCallList(list);
-    if(matrix_mode!=GL_MODELVIEW)
-        glMatrixMode(matrix_mode);
-
-    //  glPopMatrix();
-    glFlush();
-
-    WMesaViewport(Current->gl_ctx,0,0,Current->width,Current->height);
-    //  Current->gl_ctx->NewState = 0;
-    WMesaSwapBuffers();
-
-}
-
-void toggleStereoMode()
-{
-    if(!Current->db_flag)
-        return;
-    if(!stereo_flag){
-        stereo_flag = 1;
-        if(stereoBuffer==GL_FALSE)
-#if !defined(NO_PARALLEL)
-            if(!parallelFlag)
-#endif
-            {
-                Current->ScanWidth = Current->pitch*2;
-            }
-    }
-    else {
-        stereo_flag = 0;
-#if !defined(NO_PARALLEL)
-        if(!parallelFlag)
-#endif
-            Current->ScanWidth = Current->pitch;
-        Current->pbPixels = Current->addrOffScreen;
-    }
-}
-
-/* if in stereo mode, the following function is called */
-void glShowStereo(GLuint list)
-{
-    WMesaShowStereo(list);
-}
-
-#endif // End if NO_STEREO not defined
-
-#if !defined(NO_PARALLEL)
-
-void toggleParallelMode(void)
-{
-    if(!parallelFlag){
-        parallelFlag = GL_TRUE;
-        if(parallelMachine==GL_FALSE){
-            PRCreateRenderBuffer( Current->rgb_flag? GL_RGBA :GL_COLOR_INDEX,
-                Current->cColorBits/8,
-                Current->width ,Current->height,
-                Current->ScanWidth,
-                Current->rgb_flag? Current->pbPixels: Current->ScreenMem);
-            parallelMachine = GL_TRUE;
-        }
-    }
-    else {
-        parallelFlag = GL_FALSE;
-        if(parallelMachine==GL_TRUE){
-            PRDestroyRenderBuffer();
-            parallelMachine=GL_FALSE;
-            ReadyForNextFrame = GL_TRUE;
-        }
-
-        /***********************************************
-        // Seems something wrong!!!!
-        ************************************************/
-
-        WMesaMakeCurrent(Current);
-#if !defined(NO_STEREO)
-        stereo_flag = GL_FALSE ;
-#endif
-    }
-}
-
-void PRShowRenderResult(void)
-{
-    int flag = 0;
-    if(!glImageRendered())
-        return;
-
-    if (parallelFlag)
-    {
-        WMesaSwapBuffers();
-    }
-
-}
-#endif //End if NO_PARALLEL not defined
-
-//end modification
-
-BYTE DITHER_RGB_2_8BIT( int red, int green, int blue, int pixel, int scanline)
-{
-    char unsigned redtemp, greentemp, bluetemp, paletteindex;
-
-    //*** now, look up each value in the halftone matrix
-    //*** using an 8x8 ordered dither.
-    redtemp = aDividedBy51[red]
-        + (aModulo51[red] > aHalftone8x8[(pixel%8)*8
-        + scanline%8]);
-    greentemp = aDividedBy51[(char unsigned)green]
-        + (aModulo51[green] > aHalftone8x8[
-        (pixel%8)*8 + scanline%8]);
-    bluetemp = aDividedBy51[(char unsigned)blue]
-        + (aModulo51[blue] > aHalftone8x8[
-        (pixel%8)*8 +scanline%8]);
-
-    //*** recombine the halftoned rgb values into a palette index
-    paletteindex =
-        redtemp + aTimes6[greentemp] + aTimes36[bluetemp];
-
-    //*** and translate through the wing halftone palette
-    //*** translation vector to give the correct value.
-    return aWinGHalftoneTranslation[paletteindex];
-}
-
-#ifdef DDRAW
-/*
-* restoreAll
-*
-* restore all lost objects
-*/
-HRESULT DDRestoreAll( WMesaContext wc )
-{
-    HRESULT     ddrval;
-
-    ddrval = wc->lpDDSPrimary->lpVtbl->Restore(wc->lpDDSPrimary);
-    if( ddrval == DD_OK )
-    {
-        ddrval = wc->lpDDSOffScreen->lpVtbl->Restore(wc->lpDDSOffScreen);
-    }
-    return ddrval;
-
-} /* restoreAll */
-
-
-  /*
-  * This function is called if the initialization function fails
-*/
-BOOL initFail( HWND hwnd, WMesaContext wc )
-{
-    DDFree(wc);
-    MessageBox( hwnd, "DirectDraw Init FAILED", "", MB_OK );
-    return FALSE;
-
-} /* initFail */
-
-
-static void DDDeleteOffScreen(WMesaContext wc)
-{
-    if( wc->lpDDSOffScreen != NULL )
-    {
-        wc->lpDDSOffScreen->lpVtbl->Unlock(wc->lpDDSOffScreen,NULL);
-        wc->lpDDSOffScreen->lpVtbl->Release(wc->lpDDSOffScreen);
-        wc->lpDDSOffScreen = NULL;
-    }
-
-}
-
-static void DDFreePrimarySurface(WMesaContext wc)
-{
-    if( wc->lpDDSPrimary != NULL )
-    {
-        if(wc->db_flag == GL_FALSE)
-            wc->lpDDSPrimary->lpVtbl->ReleaseDC(wc->lpDDSPrimary, wc->hDC);
-        wc->lpDDSPrimary->lpVtbl->Release(wc->lpDDSPrimary);
-        wc->lpDDSPrimary = NULL;
-    }
-}
-
-static BOOL DDCreatePrimarySurface(WMesaContext wc)
-{
-    HRESULT ddrval;
-    DDSCAPS             ddscaps;
-    wc->ddsd.dwSize = sizeof( wc->ddsd );
-    wc->ddsd.dwFlags = DDSD_CAPS;
-    wc->ddsd.ddsCaps.dwCaps =   DDSCAPS_PRIMARYSURFACE;
-
-    ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD,&(wc->ddsd), &(wc->lpDDSPrimary), NULL );
-    if( ddrval != DD_OK )
-    {
-        return initFail(wc->hwnd , wc);
-    }
-    if(wc->db_flag == GL_FALSE)
-        wc->lpDDSPrimary->lpVtbl->GetDC(wc->lpDDSPrimary, wc->hDC);
-    return TRUE;
-}
-
-static BOOL DDCreateOffScreen(WMesaContext wc)
-{
-    POINT   pt;
-    HRESULT     ddrval;
-    if(wc->lpDD == NULL)
-        return FALSE;
-    GetClientRect( wc->hwnd, &(wc->rectOffScreen) );
-    wc->ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
-    wc->ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
-    wc->ddsd.dwHeight = wc->rectOffScreen.bottom - wc->rectOffScreen.top;
-    wc->ddsd.dwWidth = wc->rectOffScreen.right - wc->rectOffScreen.left;
-
-    ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD, &(wc->ddsd), &(wc->lpDDSOffScreen), NULL );
-    if( ddrval != DD_OK )
-    {
-        return FALSE;
-    }
-
-    while (wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)
-        ;
-    //  while ((ddrval = wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), DDLOCK_SURFACEMEMORYPTR , NULL)) != DD_OK)
-    ;
-    if(wc->ddsd.lpSurface==NULL)
-        return initFail(wc->hwnd, wc);
-
-    wc->ScreenMem = wc->pbPixels = wc->addrOffScreen = (PBYTE)(wc->ddsd.lpSurface);
-    wc->ScanWidth = wc->pitch = wc->ddsd.lPitch;
-    if (stereo_flag)
-        wc->ScanWidth = wc->ddsd.lPitch*2;
-
-    GetClientRect( wc->hwnd, &(wc->rectSurface) );
-    pt.x = pt.y = 0;
-    ClientToScreen( wc->hwnd, &pt );
-    OffsetRect(&(wc->rectSurface), pt.x, pt.y);
-    wmSetPixelFormat(wc, wc->hDC);
-    return TRUE;
-}
-
-/*
-* doInit - do work required for every instance of the application:
-*                create the window, initialize data
-*/
-static BOOL DDInit( WMesaContext wc, HWND hwnd)
-{
-    HRESULT             ddrval;
-    DWORD dwFrequency;
-
-    LPDIRECTDRAW            lpDD;           // DirectDraw object
-    LPDIRECTDRAW2            lpDD2;
-
-
-    wc->fullScreen = displayOptions.fullScreen;
-    wc->gMode = displayOptions.mode;
-    wc->hwnd = hwnd;
-    stereo_flag = displayOptions.stereo;
-    if(wc->db_flag!= GL_TRUE)
-        stereo_flag = GL_FALSE;
-        /*
-        * create the main DirectDraw object
-    */
-    ddrval = DirectDrawCreate( NULL, &(wc->lpDD), NULL );
-    if( ddrval != DD_OK )
-    {
-        return initFail(hwnd,wc);
-    }
-
-    // Get exclusive mode if requested
-    if(wc->fullScreen)
-    {
-        ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN );
-    }
-    else
-    {
-        ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_NORMAL );
-    }
-    if( ddrval != DD_OK )
-    {
-        return initFail(hwnd , wc);
-    }
-
-
-    /*  ddrval = wc->lpDD->lpVtbl->QueryInterface(wc->lpDD, IID_IDirectDraw2,
-    (LPVOID *)((wc->lpDD2)));
-
-    */
-    if(ddrval != DD_OK)
-        return initFail(hwnd , wc);
-
-
-    //ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));
-    //  wc->lpDD2->lpVtbl->GetMonitorFrequency(wc->lpDD, &dwFrequency);
-    switch( wc->gMode )
-    {
-    case 1:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 640, 480, displayOptions.bpp); break;
-    case 2:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 800, 600, displayOptions.bpp); break;
-    case 3:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1024, 768, displayOptions.bpp); break;
-    case 4:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1152, 864, displayOptions.bpp); break;
-    case 5:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1280, 1024, displayOptions.bpp); break;
-    }
-
-    if( ddrval != DD_OK )
-    {
-        printf("Can't modify display mode, current mode used\n");
-        //        return initFail(hwnd , wc);
-    }
-    //ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));
-    switch(ddrval){
-    case DDERR_INVALIDOBJECT:
-        break;
-    case DDERR_INVALIDPARAMS:
-        break;
-    case DDERR_UNSUPPORTEDMODE:
-        ;
-    }
-
-    if(DDCreatePrimarySurface(wc) == GL_FALSE)
-        return initFail(hwnd, wc);
-
-    if(wc->db_flag)
-        return DDCreateOffScreen(wc);
-} /* DDInit */
-
-static void DDFree( WMesaContext wc)
-{
-    if( wc->lpDD != NULL )
-    {
-        DDFreePrimarySurface(wc);
-        DDDeleteOffScreen(wc);
-        wc->lpDD->lpVtbl->Release(wc->lpDD);
-        wc->lpDD = NULL;
-    }
-    // Clean up the screen on exit
-    RedrawWindow( NULL, NULL, NULL, RDW_INVALIDATE | RDW_ERASE |
-        RDW_ALLCHILDREN );
-
-}
-#endif
-
-void WMesaMove(void)
-{
-    WMesaContext wc = Current;
-    POINT   pt;
-    if (Current != NULL){
-        GetClientRect( wc->hwnd, &(wc->rectSurface) );
-        pt.x = pt.y = 0;
-        ClientToScreen( wc->hwnd, &pt );
-        OffsetRect(&(wc->rectSurface), pt.x, pt.y);
-    }
-}
-
-
-
-/*
-* Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
-* shortcut.
-*/
-#define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
-
-
-/**********************************************************************/
-/***                   Triangle rendering                            ***/
-/**********************************************************************/
-
-/*
- * XImage, smooth, depth-buffered, PF_8A8B8G8R triangle.
- */
-static void smooth_8A8B8G8R_z_triangle( GLcontext *ctx,
-                                       GLuint v0, GLuint v1, GLuint v2,
-                                       GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint i, len = RIGHT-LEFT;                      \
-    for (i=0;i<len;i++) {                       \
-    GLdepth z = FixedToDepth(ffz);                  \
-    if (z < zRow[i]) {                      \
-    pRow[i] = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg),    \
-    FixedToInt(ffb) );          \
-    zRow[i] = z;                            \
-    }                                   \
-    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    ffz += fdzdx;                           \
-    }                                   \
-    }
-
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, smooth, depth-buffered, PF_8R8G8B triangle.
-*/
-static void smooth_8R8G8B_z_triangle( GLcontext *ctx,
-                                     GLuint v0, GLuint v1, GLuint v2,
-                                     GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint i, len = RIGHT-LEFT;                      \
-    for (i=0;i<len;i++) {                       \
-    GLdepth z = FixedToDepth(ffz);                  \
-    if (z < zRow[i]) {                      \
-    pRow[i] = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg),    \
-    FixedToInt(ffb) );          \
-    zRow[i] = z;                            \
-    }                                   \
-    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    ffz += fdzdx;                           \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-
-/*
-* XImage, smooth, depth-buffered, PF_5R6G5B triangle.
-*/
-static void smooth_5R6G5B_z_triangle( GLcontext *ctx,
-                                     GLuint v0, GLuint v1, GLuint v2,
-                                     GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
-#define PIXEL_TYPE GLushort
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint i, len = RIGHT-LEFT;                      \
-    for (i=0;i<len;i++) {                       \
-    GLdepth z = FixedToDepth(ffz);                  \
-    if (z < zRow[i]) {                      \
-    pRow[i] = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg),    \
-    FixedToInt(ffb) );          \
-    zRow[i] = z;                            \
-    }                                   \
-    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    ffz += fdzdx;                           \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-/*
-* XImage, flat, depth-buffered, PF_8A8B8G8R triangle.
-*/
-static void flat_8A8B8G8R_z_triangle( GLcontext *ctx, GLuint v0,
-                                     GLuint v1, GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_8B8G8R( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint i, len = RIGHT-LEFT;                      \
-    for (i=0;i<len;i++) {                       \
-    GLdepth z = FixedToDepth(ffz);                  \
-    if (z < zRow[i]) {                      \
-    pRow[i] = p;                            \
-    zRow[i] = z;                            \
-    }                                   \
-    ffz += fdzdx;                           \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, depth-buffered, PF_8R8G8B triangle.
-*/
-static void flat_8R8G8B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                   GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_8R8G8B( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )            \
-    {                           \
-    GLint i, len = RIGHT-LEFT;              \
-    for (i=0;i<len;i++) {               \
-    GLdepth z = FixedToDepth(ffz);          \
-    if (z < zRow[i]) {              \
-    pRow[i] = p;                    \
-    zRow[i] = z;                    \
-    }                           \
-    ffz += fdzdx;                   \
-    }                           \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, depth-buffered, PF_5R6G5B triangle.
-*/
-static void flat_5R6G5B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                   GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
-#define PIXEL_TYPE GLushort
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_5R6G5B( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )            \
-    {                           \
-    GLint i, len = RIGHT-LEFT;              \
-    for (i=0;i<len;i++) {               \
-    GLdepth z = FixedToDepth(ffz);          \
-    if (z < zRow[i]) {              \
-    pRow[i] = p;                    \
-    zRow[i] = z;                    \
-    }                           \
-    ffz += fdzdx;                   \
-    }                           \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, smooth, NON-depth-buffered, PF_8A8B8G8R triangle.
-*/
-static void smooth_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                     GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint xx;                               \
-    PIXEL_TYPE *pixel = pRow;                       \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \
-    *pixel = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg),     \
-                FixedToInt(ffb) );          \
-                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, smooth, NON-depth-buffered, PF_8R8G8B triangle.
-*/
-static void smooth_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                   GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint xx;                               \
-    PIXEL_TYPE *pixel = pRow;                       \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \
-    *pixel = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg),     \
-                FixedToInt(ffb) );          \
-                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, smooth, NON-depth-buffered, PF_5R6G5B triangle.
-*/
-static void smooth_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                   GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
-#define PIXEL_TYPE GLushort
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint xx;                               \
-    PIXEL_TYPE *pixel = pRow;                       \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \
-    *pixel = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg),     \
-                FixedToInt(ffb) );          \
-                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-
-/*
-* XImage, flat, NON-depth-buffered, PF_8A8B8G8R triangle.
-*/
-static void flat_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0,
-                                   GLuint v1, GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_8B8G8R( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )            \
-    {                           \
-    GLint xx;                       \
-    PIXEL_TYPE *pixel = pRow;               \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \
-    *pixel = p;                 \
-    }                           \
-    }
-
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, NON-depth-buffered, PF_8R8G8B triangle.
-*/
-static void flat_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                 GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)
-#define PIXEL_TYPE GLuint
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_8R8G8B( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )            \
-    {                           \
-    GLint xx;                       \
-    PIXEL_TYPE *pixel = pRow;               \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \
-    *pixel = p;                 \
-    }                           \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, NON-depth-buffered, PF_5R6G5B triangle.
-*/
-static void flat_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                 GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)
-#define PIXEL_TYPE GLushort
-    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE                  \
-    unsigned long p = PACK_5R6G5B( VB->ColorPtr->data[pv][0],    \
-    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );
-#define INNER_LOOP( LEFT, RIGHT, Y )            \
-    {                           \
-    GLint xx;                       \
-    PIXEL_TYPE *pixel = pRow;               \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \
-    *pixel = p;                 \
-    }                           \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, smooth, depth-buffered, 8-bit PF_LOOKUP triangle.
-*/
-
-static void smooth_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                 GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define INTERP_INDEX 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                                \
-    {                                                                   \
-    GLint i, len = RIGHT-LEFT;                                      \
-    for (i=0;i<len;i++) {                                           \
-    GLdepth z = FixedToDepth(ffz);                              \
-    if (z < zRow[i]) {                                          \
-    pRow[i] = FixedToInt(ffi);                                  \
-    zRow[i] = z;                                                \
-    }                                                               \
-    ffi += fdidx;                                                   \
-    ffz += fdzdx;                                                   \
-    }                                                               \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, depth-buffered, 8-bit PF_LOOKUP triangle.
-*/
-
-static void flat_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                               GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE			\
-   GLuint index = VB->IndexPtr->data[pv];	\
-   (*ctx->Driver.Index)( ctx, index );
-#define INNER_LOOP( LEFT, RIGHT, Y )	\
-   {					\
-      GLint i, len = RIGHT-LEFT;	\
-      for (i=0;i<len;i++) {		\
-         GLdepth z = FixedToDepth(ffz);	\
-         if (z < zRow[i]) {		\
-            pRow[i] = index;		\
-            zRow[i] = z;		\
-         }				\
-         ffz += fdzdx;			\
-      }					\
-   }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-
-/*
-* XImage, smooth, NON-depth-buffered, 8-bit PF_LOOKUP triangle.
-*/
-
-static void smooth_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                               GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define INTERP_INDEX 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                    \
-    {                                   \
-    GLint xx;                               \
-    PIXEL_TYPE *pixel = pRow;                       \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \
-    *pixel = FixedToInt(ffi);           \
-    ffi += fdidx;           \
-    }                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-/*
-* XImage, flat, NON-depth-buffered, 8-bit PF_LOOKUP triangle.
-*/
-static void flat_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                             GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define SETUP_CODE			\
-   GLuint index = VB->IndexPtr->data[pv];	\
-   (*ctx->Driver.Index)( ctx, index );
-#define INNER_LOOP( LEFT, RIGHT, Y )		\
-   {						\
-      GLint xx;					\
-      PIXEL_TYPE *pixel = pRow;			\
-      for (xx=LEFT;xx<RIGHT;xx++,pixel++) {	\
-         *pixel = index;			\
-      }						\
-   }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-/*
-* XImage, smooth, depth-buffered, 8-bit, PF_DITHER8 triangle.
-*/
-static void smooth_DITHER8_z_triangle( GLcontext *ctx,
-                                      GLuint v0, GLuint v1, GLuint v2,
-                                      GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-    DITHER_RGB_TO_8BIT_SETUP
-#define INTERP_Z 1
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                                    \
-    {                                                                       \
-    GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT;                 \
-    for (i=0;i<len;i++,xx++) {                                          \
-    GLdepth z = FixedToDepth(ffz);                                  \
-    if (z < zRow[i]) {                                              \
-    DITHER_RGB_TO_8BIT( FixedToInt(ffr), FixedToInt(ffg),           \
-    FixedToInt(ffb), xx, yy);               \
-    pRow[i] = pixelDithered;                                        \
-    zRow[i] = z;                                                    \
-    }                                                                   \
-    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;                     \
-    ffz += fdzdx;                                                       \
-    }                                                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-/*
-* XImage, flat, depth-buffered, 8-bit PF_DITHER triangle.
-*/
-static void flat_DITHER8_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                    GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-    DITHER_RGB_TO_8BIT_SETUP
-#define INTERP_Z 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-
-#define INNER_LOOP( LEFT, RIGHT, Y )                                    \
-    {                                                                       \
-    GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT;                 \
-    for (i=0;i<len;i++,xx++) {                                          \
-    GLdepth z = FixedToDepth(ffz);                                  \
-    if (z < zRow[i]) {                                              \
-    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],                           \
-             VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);               \
-             pRow[i] = pixelDithered;                                       \
-             zRow[i] = z;                                                   \
-    }                                                                   \
-    ffz += fdzdx;                                                       \
-    }                                                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-/*
-* XImage, smooth, NON-depth-buffered, 8-bit PF_DITHER triangle.
-*/
-static void smooth_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                    GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-    DITHER_RGB_TO_8BIT_SETUP
-#define INTERP_RGB 1
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-#define INNER_LOOP( LEFT, RIGHT, Y )                                    \
-    {                                                                       \
-    GLint xx, yy = FLIP(Y);                                             \
-    PIXEL_TYPE *pixel = pRow;                                           \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {                               \
-    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],   VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);\
-    *pixel = pixelDithered;                                         \
-    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;                     \
-    }                                                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-/*
-* XImage, flat, NON-depth-buffered, 8-bit PF_DITHER triangle.
-*/
-
-static void flat_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,
-                                  GLuint v2, GLuint pv )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-    DITHER_RGB_TO_8BIT_SETUP
-#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)
-#define PIXEL_TYPE GLubyte
-#define BYTES_PER_ROW (wmesa->ScanWidth)
-
-#define INNER_LOOP( LEFT, RIGHT, Y )                                    \
-    {                                                                       \
-    GLint xx, yy = FLIP(Y);                                             \
-    PIXEL_TYPE *pixel = pRow;                                           \
-    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {                               \
-    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],                               \
-             VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);               \
-             *pixel = pixelDithered;                                            \
-    }                                                                   \
-    }
-#ifdef __MINGW32__
-	#include "tritemp.h"
-#else
-
-	#ifdef WIN32
-		#include "..\tritemp.h"
-	#else
-		#include "tritemp.h"
-	#endif
-#endif
-}
-
-
-
-
-static triangle_func choose_triangle_function( GLcontext *ctx )
-{
-    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;
-    int depth = wmesa->cColorBits;
-
-    if (ctx->Polygon.SmoothFlag)     return NULL;
-    if (ctx->Texture._ReallyEnabled)  return NULL;
-    if (!wmesa->db_flag) return NULL;
-    /*if (wmesa->xm_buffer->buffer==XIMAGE)*/ {
-    if (   ctx->Light.ShadeModel==GL_SMOOTH
-        && ctx->_RasterMask==DEPTH_BIT
-        && ctx->Depth.Func==GL_LESS
-        && ctx->Depth.Mask==GL_TRUE
-        && ctx->Polygon.StippleFlag==GL_FALSE) {
-        switch (wmesa->pixelformat) {
-        case PF_8A8B8G8R:
-            return smooth_8A8B8G8R_z_triangle;
-        case PF_8R8G8B:
-            return smooth_8R8G8B_z_triangle;
-        case PF_5R6G5B:
-            return smooth_5R6G5B_z_triangle;
-        case PF_DITHER8:
-            return  smooth_DITHER8_z_triangle;
-        case PF_INDEX8:
-            return smooth_ci_z_triangle;
-        default:
-            return NULL;
-        }
-    }
-    if (   ctx->Light.ShadeModel==GL_FLAT
-        && ctx->_RasterMask==DEPTH_BIT
-        && ctx->Depth.Func==GL_LESS
-        && ctx->Depth.Mask==GL_TRUE
-        && ctx->Polygon.StippleFlag==GL_FALSE) {
-        switch (wmesa->pixelformat) {
-        case PF_8A8B8G8R:
-            return flat_8A8B8G8R_z_triangle;
-        case PF_8R8G8B:
-            return flat_8R8G8B_z_triangle;
-        case PF_5R6G5B:
-            return flat_5R6G5B_z_triangle;
-        case PF_DITHER8:
-            return flat_DITHER8_z_triangle;
-        case PF_INDEX8:
-            return flat_ci_z_triangle;
-        default:
-            return NULL;
-        }
-    }
-    if (   ctx->_RasterMask==0   /* no depth test */
-        && ctx->Light.ShadeModel==GL_SMOOTH
-        && ctx->Polygon.StippleFlag==GL_FALSE) {
-        switch (wmesa->pixelformat) {
-        case PF_8A8B8G8R:
-            return smooth_8A8B8G8R_triangle;
-        case PF_8R8G8B:
-            return smooth_8R8G8B_triangle;
-        case PF_5R6G5B:
-            return smooth_5R6G5B_triangle;
-        case PF_DITHER8:
-            return smooth_DITHER8_triangle;
-        case PF_INDEX8:
-            return smooth_ci_triangle;
-        default:
-            return NULL;
-        }
-    }
-
-    if (   ctx->_RasterMask==0   /* no depth test */
-        && ctx->Light.ShadeModel==GL_FLAT
-        && ctx->Polygon.StippleFlag==GL_FALSE) {
-        switch (wmesa->pixelformat) {
-        case PF_8A8B8G8R:
-            return flat_8A8B8G8R_triangle;
-        case PF_8R8G8B:
-            return flat_8R8G8B_triangle;
-        case PF_5R6G5B:
-            return flat_5R6G5B_triangle;
-        case PF_DITHER8:
-            return flat_DITHER8_triangle;
-        case PF_INDEX8:
-            return flat_ci_triangle;
-        default:
-            return NULL;
-        }
-    }
-
-    return NULL;
-    }
-}
-
-/*
-* Define a new viewport and reallocate auxillary buffers if the size of
-* the window (color buffer) has changed.
-*/
-void WMesaViewport( GLcontext *ctx,
-                   GLint x, GLint y, GLsizei width, GLsizei height )
-{
-    /* Save viewport */
-    ctx->Viewport.X = x;
-    ctx->Viewport.Width = width;
-    ctx->Viewport.Y = y;
-    ctx->Viewport.Height = height;
-
-    /* compute scale and bias values */
-/* Pre-Keith 3.1 changes
-    ctx->Viewport.Map.m[Sx] = (GLfloat) width / 2.0F;
-    ctx->Viewport.Map.m[Tx] = ctx->Viewport.Sx + x;
-    ctx->Viewport.Map.m[Sy] = (GLfloat) height / 2.0F;
-    ctx->Viewport.Map.m[Ty] = ctx->Viewport.Sy + y;
-*/
-	ctx->Viewport.WindowMap.m[MAT_SX] = (GLfloat) width / 2.0F;
-	ctx->Viewport.WindowMap.m[MAT_TX] = ctx->Viewport.WindowMap.m[MAT_SX] + x;
-	ctx->Viewport.WindowMap.m[MAT_SY] = (GLfloat) height / 2.0F;
-	ctx->Viewport.WindowMap.m[MAT_TY] = ctx->Viewport.WindowMap.m[MAT_SY] + y;
-}
+/* $Id: wmesa.c,v 1.18 2001/09/14 22:19:19 brianp Exp $ */

+

+/*

+ * Windows (Win32) device driver for Mesa 3.4

+ *

+ * Original author:

+ *

+ *  Copyright (C) 1996-  Li Wei

+ *  Address      :       Institute of Artificial Intelligence

+ *               :           & Robotics

+ *               :       Xi'an Jiaotong University

+ *  Email        :       liwei@aiar.xjtu.edu.cn

+ *  Web page :       http://sun.aiar.xjtu.edu.cn

+ *

+ *  This file and its associations are partially borrowed from the

+ *  Windows NT driver for Mesa 1.8 , written by Mark Leaming

+ *  (mark@rsinc.com).

+ */

+

+

+#define WMESA_STEREO_C

+

+#include <windows.h>

+#include <stdio.h>

+#include <stdlib.h>

+#include <GL/wmesa.h>

+#include "mesa_extend.h"

+#include "colors.h"

+#include "macros.h"

+#include "context.h"

+#include "dd.h"

+//#include "xform.h"

+//#include "vb.h"

+#include "matrix.h"

+#include "depth.h"

+#include "wmesadef.h"

+

+#pragma warning ( disable : 4100 4133 4761 )

+

+#ifdef PROFILE

+//  #include "profile.h"

+#endif

+

+#ifdef DITHER

+#include <wing.h>

+#endif

+

+#ifdef __CYGWIN32__

+#include "macros.h"

+#include <string.h>

+#define CopyMemory memcpy

+#endif

+

+#if !defined(NO_STEREO)

+

+#include "gl\glu.h"

+#include "stereo.h"

+

+#endif

+#if !defined(NO_PARALLEL)

+  #include "parallel.h"

+#endif

+

+struct DISPLAY_OPTIONS displayOptions;

+

+GLenum stereoCompile = GL_FALSE ;

+GLenum stereoShowing  = GL_FALSE ;

+GLenum stereoBuffer = GL_FALSE;

+#if !defined(NO_STEREO)

+GLint displayList = MAXIMUM_DISPLAY_LIST ;

+#endif

+GLint stereo_flag = 0 ;

+

+/* end of added code*/

+

+static PWMC Current = NULL;

+WMesaContext WC = NULL;

+

+#ifdef NDEBUG

+#define assert(ignore)  ((void) 0)

+#else

+void Mesa_Assert(void *Cond,void *File,unsigned Line)

+{

+    char Msg[512];

+    sprintf(Msg,"%s %s %d",Cond,File,Line);

+    MessageBox(NULL,Msg,"Assertion failed.",MB_OK);

+    exit(1);

+}

+#define assert(e)   if (!e) Mesa_Assert(#e,__FILE__,__LINE__);

+#endif

+

+//#define DD_GETDC (Current->hDC )

+#define DD_GETDC ((Current->db_flag) ? Current->dib.hDC : Current->hDC )

+//#define DD_GETDC ((Current->db_flag) ? Current->hDCPrimary : Current->hDCBack )

+#define DD_RELEASEDC

+

+//#define BEGINGDICALL  if(Current->rgb_flag)wmFlushBits(Current);

+#define BEGINGDICALL

+//#define ENDGDICALL        if(Current->rgb_flag)wmGetBits(Current);

+#define ENDGDICALL

+

+//#define FLIP(Y)  (Current->dither_flag? Y : Current->height-(Y)-1)

+//#define FLIP(Y)  (Current->height-(Y)-1)

+//#define FLIP(Y) Y

+/*

+ * XXX Why only flip Y coord if single buffered???

+ */

+#define FLIP(Y)  (Current->db_flag? Y: Current->height-(Y)-1)

+#define STARTPROFILE

+#define ENDPROFILE(PARA)

+

+#define DITHER_RGB_TO_8BIT_SETUP            \

+GLubyte pixelDithered;

+

+#define DITHER_RGB_TO_8BIT(red, green, blue, pixel, scanline)               \

+{                                                                           \

+    char unsigned redtemp, greentemp, bluetemp, paletteindex;               \

+    redtemp = aDividedBy51[red]                                             \

+    + (aModulo51[red] > aHalftone8x8[(pixel%8)*8                        \

+    + scanline%8]);                                                 \

+    greentemp = aDividedBy51[(char unsigned)green]                          \

+    + (aModulo51[green] > aHalftone8x8[                             \

+    (pixel%8)*8 + scanline%8]);                                     \

+    bluetemp = aDividedBy51[(char unsigned)blue]                            \

+    + (aModulo51[blue] > aHalftone8x8[                              \

+    (pixel%8)*8 +scanline%8]);                                      \

+    paletteindex = redtemp + aTimes6[greentemp] + aTimes36[bluetemp];       \

+    pixelDithered = aWinGHalftoneTranslation[paletteindex];                 \

+}

+

+

+#ifdef DDRAW

+static BOOL DDInit( WMesaContext wc, HWND hwnd);

+static void DDFree( WMesaContext wc);

+static HRESULT DDRestoreAll( WMesaContext wc );

+static void DDDeleteOffScreen(WMesaContext wc);

+static BOOL DDCreateOffScreen(WMesaContext wc);

+#endif

+

+static void FlushToFile(PWMC pwc, PSTR  szFile);

+

+BOOL wmCreateBackingStore(PWMC pwc, long lxSize, long lySize);

+BOOL wmDeleteBackingStore(PWMC pwc);

+void wmCreatePalette( PWMC pwdc );

+BOOL wmSetDibColors(PWMC pwc);

+void wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b);

+

+void wmCreateDIBSection(

+                        HDC  hDC,

+                        PWMC pwc,   // handle of device context

+                        CONST BITMAPINFO *pbmi, // address of structure containing bitmap size, format, and color data

+                        UINT iUsage // color data type indicator: RGB values or palette indices

+                        );

+

+

+void WMesaViewport( GLcontext *ctx,

+                    GLint x, GLint y, GLsizei width, GLsizei height );

+

+

+//static triangle_func choose_triangle_function( GLcontext *ctx );

+

+

+static void wmSetPixelFormat( PWMC wc, HDC hDC)

+{

+    if(wc->rgb_flag)

+        wc->cColorBits = GetDeviceCaps(hDC, BITSPIXEL);

+    else

+        wc->cColorBits = 8;

+    switch(wc->cColorBits){

+    case 8:

+        if(wc->dither_flag != GL_TRUE)

+            wc->pixelformat = PF_INDEX8;

+        else

+            wc->pixelformat = PF_DITHER8;

+        break;

+    case 16:

+        wc->pixelformat = PF_5R6G5B;

+        break;

+    case 32:

+        wc->pixelformat = PF_8R8G8B;

+        break;

+    default:

+        wc->pixelformat = PF_BADFORMAT;

+    }

+}

+

+//

+// This function sets the color table of a DIB section

+// to match that of the destination DC

+//

+BOOL /*WINAPI*/ wmSetDibColors(PWMC pwc)

+{

+    RGBQUAD         *pColTab, *pRGB;

+    PALETTEENTRY    *pPal, *pPE;

+    int             i, nColors;

+    BOOL            bRet=TRUE;

+    DWORD           dwErr=0;

+

+    /* Build a color table in the DIB that maps to the

+    selected palette in the DC.

+    */

+    nColors = 1 << pwc->cColorBits;

+    pPal = (PALETTEENTRY *)malloc( nColors * sizeof(PALETTEENTRY));

+    memset( pPal, 0, nColors * sizeof(PALETTEENTRY) );

+    GetPaletteEntries( pwc->hGLPalette, 0, nColors, pPal );

+    pColTab = (RGBQUAD *)malloc( nColors * sizeof(RGBQUAD));

+    for (i = 0, pRGB = pColTab, pPE = pPal; i < nColors; i++, pRGB++, pPE++) {

+        pRGB->rgbRed = pPE->peRed;

+        pRGB->rgbGreen = pPE->peGreen;

+        pRGB->rgbBlue = pPE->peBlue;

+    }

+    if(pwc->db_flag)

+        bRet = SetDIBColorTable(pwc->dib.hDC, 0, nColors, pColTab );

+

+    if(!bRet)

+        dwErr = GetLastError();

+

+    free( pColTab );

+    free( pPal );

+

+    return(bRet);

+}

+

+

+//

+// Free up the dib section that was created

+//

+BOOL wmDeleteBackingStore(PWMC pwc)

+{

+    SelectObject(pwc->dib.hDC, pwc->hOldBitmap);

+    DeleteDC(pwc->dib.hDC);

+    DeleteObject(pwc->hbmDIB);

+    UnmapViewOfFile(pwc->dib.base);

+    CloseHandle(pwc->dib.hFileMap);

+    return TRUE;

+}

+

+

+//

+// This function creates the DIB section that is used for combined

+// GL and GDI calls

+//

+BOOL /*WINAPI*/ wmCreateBackingStore(PWMC pwc, long lxSize, long lySize)

+{

+    HDC hdc = pwc->hDC;

+    LPBITMAPINFO pbmi = &(pwc->bmi);

+    int     iUsage;

+

+    pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

+    pbmi->bmiHeader.biWidth = lxSize;

+    pbmi->bmiHeader.biHeight= -lySize;

+    pbmi->bmiHeader.biPlanes = 1;

+    if(pwc->rgb_flag)

+        pbmi->bmiHeader.biBitCount = GetDeviceCaps(pwc->hDC, BITSPIXEL);

+    else

+        pbmi->bmiHeader.biBitCount = 8;

+    pbmi->bmiHeader.biCompression = BI_RGB;

+    pbmi->bmiHeader.biSizeImage = 0;

+    pbmi->bmiHeader.biXPelsPerMeter = 0;

+    pbmi->bmiHeader.biYPelsPerMeter = 0;

+    pbmi->bmiHeader.biClrUsed = 0;

+    pbmi->bmiHeader.biClrImportant = 0;

+

+    iUsage = (pbmi->bmiHeader.biBitCount <= 8) ? DIB_PAL_COLORS : DIB_RGB_COLORS;

+

+    pwc->cColorBits = pbmi->bmiHeader.biBitCount;

+    pwc->ScanWidth = pwc->pitch = lxSize;

+

+    wmCreateDIBSection(hdc, pwc, pbmi, iUsage);

+

+    if ((iUsage == DIB_PAL_COLORS) && !(pwc->hGLPalette)) {

+        wmCreatePalette( pwc );

+        wmSetDibColors( pwc );

+    }

+    wmSetPixelFormat(pwc, pwc->hDC);

+    return(TRUE);

+

+}

+

+

+//

+// This function copies one scan line in a DIB section to another

+//

+BOOL WINAPI wmSetDIBits(PWMC pwc, UINT uiScanWidth, UINT uiNumScans, UINT nBypp, UINT uiNewWidth, LPBYTE pBits)

+{

+    UINT uiScans = 0;

+    LPBYTE  pDest = pwc->pbPixels;

+    DWORD   dwNextScan = uiScanWidth;

+    DWORD   dwNewScan = uiNewWidth;

+    DWORD   dwScanWidth = (uiScanWidth * nBypp);

+

+    //

+    // We need to round up to the nearest DWORD

+    // and multiply by the number of bytes per

+    // pixel

+    //

+    dwNextScan = (((dwNextScan * nBypp)+ 3) & ~3);

+    dwNewScan = (((dwNewScan * nBypp)+ 3) & ~3);

+

+    for(uiScans = 0; uiScans < uiNumScans; uiScans++){

+        CopyMemory(pDest, pBits, dwScanWidth);

+        pBits += dwNextScan;

+        pDest += dwNewScan;

+    }

+

+    return(TRUE);

+

+}

+

+

+BOOL wmFlush(PWMC pwc);

+

+/*

+* Useful macros:

+Modified from file osmesa.c

+*/

+

+

+#define PIXELADDR(X,Y)  ((GLubyte *)Current->pbPixels + (Current->height-Y-1)* Current->ScanWidth + (X)*nBypp)

+#define PIXELADDR1( X, Y )  \

+((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X))

+#define PIXELADDR2( X, Y )  \

+((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*2)

+#define PIXELADDR4( X, Y )  \

+((GLubyte *)wmesa->pbPixels + (wmesa->height-Y-1)* wmesa->ScanWidth + (X)*4)

+

+

+BYTE DITHER_RGB_2_8BIT( int r, int g, int b, int x, int y);

+

+/* Finish all pending operations and synchronize. */

+static void finish(GLcontext* ctx)

+{

+    /* No op */

+}

+

+

+//

+// We cache all gl draw routines until a flush is made

+//

+static void flush(GLcontext* ctx)

+{

+    STARTPROFILE

+        if((Current->rgb_flag /*&& !(Current->dib.fFlushed)*/&&!(Current->db_flag))

+            ||(!Current->rgb_flag))

+        {

+            wmFlush(Current);

+        }

+        ENDPROFILE(flush)

+

+}

+

+

+

+/*

+* Set the color index used to clear the color buffer.

+*/

+static void clear_index(GLcontext* ctx, GLuint index)

+{

+    STARTPROFILE

+        Current->clearpixel = index;

+    ENDPROFILE(clear_index)

+}

+

+

+

+/*

+* Set the color used to clear the color buffer.

+*/

+static void clear_color( GLcontext* ctx, const GLchan color[4] )

+{

+    STARTPROFILE

+        Current->clearpixel = RGB(color[0], color[1], color[2]);

+    ENDPROFILE(clear_color)

+}

+

+

+

+/*

+* Clear the specified region of the color buffer using the clear color

+* or index as specified by one of the two functions above.

+*/

+//static void clear(GLcontext* ctx,

+//                  GLboolean all,GLint x, GLint y, GLint width, GLint height )

+// TODO: I modified this function to match the prototype in

+//       dd.h. (swansma@geocities.com)

+

+static GLbitfield clear(GLcontext* ctx, GLbitfield mask,

+                  GLboolean all, GLint x, GLint y, GLint width, GLint height)

+{

+    DWORD   dwColor;

+    WORD    wColor;

+    BYTE    bColor;

+    LPDWORD lpdw = (LPDWORD)Current->pbPixels;

+    LPWORD  lpw = (LPWORD)Current->pbPixels;

+    LPBYTE  lpb = Current->pbPixels;

+    int     lines;

+

+    STARTPROFILE

+

+        if (all){

+            x=y=0;

+            width=Current->width;

+            height=Current->height;

+        }

+        if(Current->db_flag==GL_TRUE){

+            UINT    nBypp = Current->cColorBits / 8;

+            int     i = 0;

+            int     iSize = 0;

+

+            if(nBypp ==1 ){

+                /* Need rectification */

+                iSize = Current->width/4;

+                bColor  = BGR8(GetRValue(Current->clearpixel),

+                    GetGValue(Current->clearpixel),

+                    GetBValue(Current->clearpixel));

+                wColor  = MAKEWORD(bColor,bColor);

+                dwColor = MAKELONG(wColor, wColor);

+            }

+            if(nBypp == 2){

+                iSize = Current->width / 2;

+                wColor = BGR16(GetRValue(Current->clearpixel),

+                    GetGValue(Current->clearpixel),

+                    GetBValue(Current->clearpixel));

+                dwColor = MAKELONG(wColor, wColor);

+            }

+            else if(nBypp == 4){

+                iSize = Current->width;

+                dwColor = BGR32(GetRValue(Current->clearpixel),

+                    GetGValue(Current->clearpixel),

+                    GetBValue(Current->clearpixel));

+            }

+

+            while(i < iSize){

+                *lpdw = dwColor;

+                lpdw++;

+                i++;

+            }

+

+            //

+            // This is the 24bit case

+            //

+            if (nBypp == 3) {

+                iSize = Current->width *3/4;

+                dwColor = BGR24(GetRValue(Current->clearpixel),

+                    GetGValue(Current->clearpixel),

+                    GetBValue(Current->clearpixel));

+                while(i < iSize){

+                    *lpdw = dwColor;

+                    lpb += nBypp;

+                    lpdw = (LPDWORD)lpb;

+                    i++;

+                }

+            }

+

+            i = 0;

+            if (stereo_flag)

+               lines = height /2;

+            else

+               lines = height;

+            do {

+                memcpy(lpb, Current->pbPixels, iSize*4);

+                lpb += Current->ScanWidth;

+                i++;

+            }

+            while (i<lines-1);

+        }

+        else { // For single buffer

+            HDC DC=DD_GETDC;

+            HPEN Pen=CreatePen(PS_SOLID,1,Current->clearpixel);

+            HBRUSH Brush=CreateSolidBrush(Current->clearpixel);

+            HPEN Old_Pen=SelectObject(DC,Pen);

+            HBRUSH Old_Brush=SelectObject(DC,Brush);

+            Rectangle(DC,x,y,x+width,y+height);

+            SelectObject(DC,Old_Pen);

+            SelectObject(DC,Old_Brush);

+            DeleteObject(Pen);

+            DeleteObject(Brush);

+            DD_RELEASEDC;

+        }

+

+

+

+        ENDPROFILE(clear)

+

+		return mask;	// TODO: I doubt this is correct. dd.h doesn't explain what this should

+		                //       be...

+}

+

+

+

+static void enable( GLcontext* ctx, GLenum pname, GLboolean enable )

+{

+   if (!Current)

+      return;

+

+   if (pname == GL_DITHER) {

+      if(enable == GL_FALSE){

+         Current->dither_flag = GL_FALSE;

+         if(Current->cColorBits == 8)

+            Current->pixelformat = PF_INDEX8;

+      }

+      else{

+         if (Current->rgb_flag && Current->cColorBits == 8){

+            Current->pixelformat = PF_DITHER8;

+            Current->dither_flag = GL_TRUE;

+         }

+         else

+            Current->dither_flag = GL_FALSE;

+      }

+   }

+}

+

+

+

+static GLboolean set_draw_buffer( GLcontext* ctx, GLenum mode )

+{

+   STARTPROFILE

+   /* TODO: this could be better */

+   if (mode==GL_FRONT_LEFT || mode==GL_BACK_LEFT) {

+      return GL_TRUE;

+   }

+   else {

+      return GL_FALSE;

+   }

+   ENDPROFILE(set_draw_buffer)

+}

+

+

+static void set_read_buffer(GLcontext *ctx, GLframebuffer *colorBuffer,

+                            GLenum buffer )

+{

+   /* XXX todo */

+   return;

+}

+

+

+

+/* Return characteristics of the output buffer. */

+static void buffer_size( GLcontext* ctx, GLuint *width, GLuint *height )

+{

+   int New_Size;

+   RECT CR;

+

+   STARTPROFILE

+   GetClientRect(Current->Window,&CR);

+

+   *width=CR.right;

+   *height=CR.bottom;

+

+   New_Size=((*width)!=Current->width) || ((*height)!=Current->height);

+

+   if (New_Size){

+      Current->width=*width;

+      Current->height=*height;

+      Current->ScanWidth=Current->width;

+      if ((Current->ScanWidth%sizeof(long))!=0)

+         Current->ScanWidth+=(sizeof(long)-(Current->ScanWidth%sizeof(long)));

+

+      if (Current->db_flag){

+#ifdef DDRAW

+         DDDeleteOffScreen(Current);

+         DDCreateOffScreen(Current);

+#else

+         if (Current->rgb_flag==GL_TRUE && Current->dither_flag!=GL_TRUE){

+            wmDeleteBackingStore(Current);

+            wmCreateBackingStore(Current, Current->width, Current->height);

+         }

+#endif

+      }

+

+      //  Resize OsmesaBuffer if in Parallel mode

+#if !defined(NO_PARALLEL)

+      if(parallelFlag)

+         PRSizeRenderBuffer(Current->width, Current->height,Current->ScanWidth,

+                            Current->rgb_flag == GL_TRUE ? Current->pbPixels: Current->ScreenMem);

+#endif

+   }

+   ENDPROFILE(buffer_size)

+}

+

+

+

+/**********************************************************************/

+/*****           Accelerated point, line, polygon rendering       *****/

+/**********************************************************************/

+

+

+static void fast_rgb_points( GLcontext* ctx, GLuint first, GLuint last )

+{

+#if 0

+    GLuint i;

+    //  HDC DC=DD_GETDC;

+    PWMC    pwc = Current;

+

+    STARTPROFILE

+

+        if (0 /*Current->gl_ctx->VB->MonoColor*/) {

+            /* all drawn with current color */

+            for (i=first;i<=last;i++) {

+                if (!Current->gl_ctx->VB->ClipMask[i]) {

+                    int x, y;

+                    x =       (GLint) Current->gl_ctx->VB->Win.data[i][0];

+                    y = FLIP( (GLint) Current->gl_ctx->VB->Win.data[i][1] );

+                    wmSetPixel(pwc, y,x,GetRValue(Current->pixel),

+                        GetGValue(Current->pixel), GetBValue(Current->pixel));

+                }

+            }

+        }

+        else {

+            /* draw points of different colors */

+            for (i=first;i<=last;i++) {

+                if (!Current->gl_ctx->VB->ClipMask[i]) {

+                    int x, y;

+                    unsigned long pixel=RGB(Current->gl_ctx->VB->ColorPtr->data[i][0]*255.0,

+                        Current->gl_ctx->VB->ColorPtr->data[i][1]*255.0,

+                        Current->gl_ctx->VB->ColorPtr->data[i][2]*255.0);

+                    x =       (GLint) Current->gl_ctx->VB->Win.data[i][0];

+                    y = FLIP( (GLint) Current->gl_ctx->VB->Win.data[i][1] );

+                    wmSetPixel(pwc, y,x,Current->gl_ctx->VB->ColorPtr->data[i][0]*255.0,

+                        Current->gl_ctx->VB->ColorPtr->data[i][1]*255.0,

+                        Current->gl_ctx->VB->ColorPtr->data[i][2]*255.0);

+                }

+            }

+        }

+        //   DD_RELEASEDC;

+        ENDPROFILE(fast_rgb_points)

+#endif

+}

+

+

+

+/* Return pointer to accerated points function */

+extern /*points_func*/ choose_points_function( GLcontext* ctx )

+{

+#if 0

+    STARTPROFILE

+        if (ctx->Point.Size==1.0 && !ctx->Point.SmoothFlag && ctx->_RasterMask==0

+            && !ctx->Texture._ReallyEnabled  && ctx->Visual->RGBAflag) {

+            ENDPROFILE(choose_points_function)

+                return fast_rgb_points;

+        }

+        else {

+            ENDPROFILE(choose_points_function)

+                return NULL;

+        }

+#endif

+}

+

+

+

+/* Draw a line using the color specified by Current->gl_ctx->VB->ColorPtr->data[pv] */

+static void fast_flat_rgb_line( GLcontext* ctx, GLuint v0, GLuint v1, GLuint pv )

+{

+#if 0

+    STARTPROFILE

+        int x0, y0, x1, y1;

+    unsigned long pixel;

+    HDC DC=DD_GETDC;

+    HPEN Pen;

+    HPEN Old_Pen;

+

+    if (0 /*Current->gl_ctx->VB->MonoColor*/) {

+        pixel = Current->pixel;  /* use current color */

+    }

+    else {

+        pixel = RGB(Current->gl_ctx->VB->ColorPtr->data[pv][0]*255.0, Current->gl_ctx->VB->ColorPtr->data[pv][1]*255.0, Current->gl_ctx->VB->ColorPtr->data[pv][2]*255.0);

+    }

+

+    x0 =       (int) Current->gl_ctx->VB->Win.data[v0][0];

+    y0 = FLIP( (int) Current->gl_ctx->VB->Win.data[v0][1] );

+    x1 =       (int) Current->gl_ctx->VB->Win.data[v1][0];

+    y1 = FLIP( (int) Current->gl_ctx->VB->Win.data[v1][1] );

+

+

+    BEGINGDICALL

+

+    Pen=CreatePen(PS_SOLID,1,pixel);

+    Old_Pen=SelectObject(DC,Pen);

+    MoveToEx(DC,x0,y0,NULL);

+    LineTo(DC,x1,y1);

+    SelectObject(DC,Old_Pen);

+    DeleteObject(Pen);

+    DD_RELEASEDC;

+

+    ENDGDICALL

+

+    ENDPROFILE(fast_flat_rgb_line)

+#endif

+}

+

+

+

+/* Return pointer to accerated line function */

+static /*line_func*/ choose_line_function( GLcontext* ctx )

+{

+#if 0

+    STARTPROFILE

+    if (ctx->Line.Width==1.0 && !ctx->Line.SmoothFlag && !ctx->Line.StippleFlag

+        && ctx->Light.ShadeModel==GL_FLAT && ctx->_RasterMask==0

+        && !ctx->Texture._ReallyEnabled && Current->rgb_flag) {

+       ENDPROFILE(choose_line_function)

+       return fast_flat_rgb_line;

+    }

+    else {

+       ENDPROFILE(choose_line_function)

+       return NULL;

+    }

+#endif

+}

+

+

+/**********************************************************************/

+/*****                 Span-based pixel drawing                   *****/

+/**********************************************************************/

+

+

+/* Write a horizontal span of 32-bit color-index pixels with a boolean mask. */

+static void write_ci32_span( const GLcontext* ctx,

+                             GLuint n, GLint x, GLint y,

+                             const GLuint index[],

+                             const GLubyte mask[] )

+{

+    STARTPROFILE

+    GLuint i;

+    PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;

+    assert(Current->rgb_flag==GL_FALSE);

+    for (i=0; i<n; i++)

+        if (mask[i])

+            Mem[i]=index[i];

+    ENDPROFILE(write_ci32_span)

+}

+

+

+/* Write a horizontal span of 8-bit color-index pixels with a boolean mask. */

+static void write_ci8_span( const GLcontext* ctx,

+                            GLuint n, GLint x, GLint y,

+                            const GLubyte index[],

+                            const GLubyte mask[] )

+{

+    STARTPROFILE

+    GLuint i;

+    PBYTE Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;

+    assert(Current->rgb_flag==GL_FALSE);

+    for (i=0; i<n; i++)

+        if (mask[i])

+            Mem[i]=index[i];

+    ENDPROFILE(write_ci8_span)

+}

+

+

+

+/*

+* Write a horizontal span of pixels with a boolean mask.  The current

+* color index is used for all pixels.

+*/

+static void write_mono_ci_span(const GLcontext* ctx,

+                               GLuint n,GLint x,GLint y,

+                               GLuint colorIndex, const GLubyte mask[])

+{

+   STARTPROFILE

+   GLuint i;

+   BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;

+   assert(Current->rgb_flag==GL_FALSE);

+   for (i=0; i<n; i++)

+      if (mask[i])

+         Mem[i]=colorIndex;

+   ENDPROFILE(write_mono_ci_span)

+}

+

+/*

+ * To improve the performance of this routine, frob the data into an actual

+ * scanline and call bitblt on the complete scan line instead of SetPixel.

+ */

+

+/* Write a horizontal span of RGBA color pixels with a boolean mask. */

+static void write_rgba_span( const GLcontext* ctx, GLuint n, GLint x, GLint y,

+                             const GLubyte rgba[][4], const GLubyte mask[] )

+{

+    STARTPROFILE

+    PWMC    pwc = Current;

+

+    if (pwc->rgb_flag==GL_TRUE)

+    {

+        GLuint i;

+        HDC DC=DD_GETDC;

+        y=FLIP(y);

+        if (mask) {

+            for (i=0; i<n; i++)

+                if (mask[i])

+                    wmSetPixel(pwc, y, x + i, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);

+        }

+        else {

+            for (i=0; i<n; i++)

+                wmSetPixel(pwc, y, x + i, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] );

+        }

+        DD_RELEASEDC;

+    }

+    else

+    {

+        GLuint i;

+        BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x;

+        y = FLIP(y);

+        if (mask) {

+            for (i=0; i<n; i++)

+                if (mask[i])

+                    Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));

+        }

+        else {

+            for (i=0; i<n; i++)

+                Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));

+        }

+    }

+    ENDPROFILE(write_rgba_span)

+

+}

+

+/* Write a horizontal span of RGB color pixels with a boolean mask. */

+static void write_rgb_span( const GLcontext* ctx,

+                            GLuint n, GLint x, GLint y,

+                            const GLubyte rgb[][3], const GLubyte mask[] )

+{

+    STARTPROFILE

+    PWMC    pwc = Current;

+

+    if (pwc->rgb_flag==GL_TRUE)

+    {

+        GLuint i;

+        HDC DC=DD_GETDC;

+        y=FLIP(y);

+        if (mask) {

+            for (i=0; i<n; i++)

+                if (mask[i])

+                    wmSetPixel(pwc, y, x + i, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]);

+        }

+        else {

+            for (i=0; i<n; i++)

+                wmSetPixel(pwc, y, x + i, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] );

+        }

+        DD_RELEASEDC;

+    }

+    else

+    {

+        GLuint i;

+        BYTE *Mem=Current->ScreenMem+y*Current->ScanWidth+x;

+        y = FLIP(y);

+        if (mask) {

+            for (i=0; i<n; i++)

+                if (mask[i])

+                    Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]));

+        }

+        else {

+            for (i=0; i<n; i++)

+                Mem[i] = GetNearestPaletteIndex(Current->hPal,RGB(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]));

+        }

+    }

+    ENDPROFILE(write_rgb_span)

+

+}

+

+/*

+* Write a horizontal span of pixels with a boolean mask.  The current color

+* is used for all pixels.

+*/

+static void write_mono_rgba_span( const GLcontext* ctx,

+                                  GLuint n, GLint x, GLint y,

+                                  const GLchan color[4], const GLubyte mask[])

+{

+    ULONG pixel =  RGB( color[RCOMP], color[GCOMP], color[BCOMP] );

+    STARTPROFILE

+    GLuint i;

+    HDC DC=DD_GETDC;

+    PWMC pwc = Current;

+    assert(Current->rgb_flag==GL_TRUE);

+    y=FLIP(y);

+    if(Current->rgb_flag==GL_TRUE){

+        for (i=0; i<n; i++)

+            if (mask[i])

+                // Trying

+                wmSetPixel(pwc,y,x+i,color[RCOMP], color[GCOMP], color[BCOMP]);

+    }

+    else {

+        for (i=0; i<n; i++)

+            if (mask[i])

+                SetPixel(DC, y, x+i, pixel);

+    }

+    DD_RELEASEDC;

+    ENDPROFILE(write_mono_rgba_span)

+}

+

+

+

+/**********************************************************************/

+/*****                   Array-based pixel drawing                *****/

+/**********************************************************************/

+

+

+/* Write an array of 32-bit index pixels with a boolean mask. */

+static void write_ci32_pixels( const GLcontext* ctx,

+                               GLuint n, const GLint x[], const GLint y[],

+                               const GLuint index[], const GLubyte mask[] )

+{

+   STARTPROFILE

+   GLuint i;

+   assert(Current->rgb_flag==GL_FALSE);

+   for (i=0; i<n; i++) {

+      if (mask[i]) {

+         BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i];

+         *Mem = index[i];

+      }

+   }

+   ENDPROFILE(write_ci32_pixels)

+}

+

+

+

+/*

+* Write an array of pixels with a boolean mask.  The current color

+* index is used for all pixels.

+*/

+static void write_mono_ci_pixels( const GLcontext* ctx,

+                                  GLuint n,

+                                  const GLint x[], const GLint y[],

+                                  GLuint colorIndex, const GLubyte mask[] )

+{

+   STARTPROFILE

+   GLuint i;

+   assert(Current->rgb_flag==GL_FALSE);

+   for (i=0; i<n; i++) {

+      if (mask[i]) {

+         BYTE *Mem=Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i];

+         *Mem = colorIndex;

+      }

+   }

+   ENDPROFILE(write_mono_ci_pixels)

+}

+

+

+

+/* Write an array of RGBA pixels with a boolean mask. */

+static void write_rgba_pixels( const GLcontext* ctx,

+                               GLuint n, const GLint x[], const GLint y[],

+                               const GLubyte rgba[][4], const GLubyte mask[] )

+{

+    STARTPROFILE

+        GLuint i;

+    PWMC    pwc = Current;

+    HDC DC=DD_GETDC;

+    assert(Current->rgb_flag==GL_TRUE);

+    for (i=0; i<n; i++)

+       if (mask[i])

+          wmSetPixel(pwc, FLIP(y[i]), x[i],

+                     rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);

+    DD_RELEASEDC;

+    ENDPROFILE(write_rgba_pixels)

+}

+

+

+

+/*

+* Write an array of pixels with a boolean mask.  The current color

+* is used for all pixels.

+*/

+static void write_mono_rgba_pixels( const GLcontext* ctx,

+                                    GLuint n,

+                                    const GLint x[], const GLint y[],

+                                    const GLchan color[4],

+                                    const GLubyte mask[] )

+{

+    STARTPROFILE

+    GLuint i;

+    PWMC    pwc = Current;

+    HDC DC=DD_GETDC;

+    assert(Current->rgb_flag==GL_TRUE);

+    for (i=0; i<n; i++)

+        if (mask[i])

+            wmSetPixel(pwc, FLIP(y[i]),x[i],color[RCOMP],

+                       color[GCOMP], color[BCOMP]);

+    DD_RELEASEDC;

+    ENDPROFILE(write_mono_rgba_pixels)

+}

+

+

+

+/**********************************************************************/

+/*****            Read spans/arrays of pixels                     *****/

+/**********************************************************************/

+

+

+/* Read a horizontal span of color-index pixels. */

+static void read_ci32_span( const GLcontext* ctx, GLuint n, GLint x, GLint y,

+                            GLuint index[])

+{

+   STARTPROFILE

+   GLuint i;

+   BYTE *Mem=Current->ScreenMem+FLIP(y)*Current->ScanWidth+x;

+   assert(Current->rgb_flag==GL_FALSE);

+   for (i=0; i<n; i++)

+      index[i]=Mem[i];

+   ENDPROFILE(read_ci32_span)

+}

+

+

+

+

+/* Read an array of color index pixels. */

+static void read_ci32_pixels( const GLcontext* ctx,

+                              GLuint n, const GLint x[], const GLint y[],

+                              GLuint indx[], const GLubyte mask[] )

+{

+   STARTPROFILE

+   GLuint i;

+   assert(Current->rgb_flag==GL_FALSE);

+   for (i=0; i<n; i++) {

+      if (mask[i]) {

+         indx[i]=*(Current->ScreenMem+FLIP(y[i])*Current->ScanWidth+x[i]);

+      }

+   }

+   ENDPROFILE(read_ci32_pixels)

+}

+

+

+

+/* Read a horizontal span of color pixels. */

+static void read_rgba_span( const GLcontext* ctx,

+                            GLuint n, GLint x, GLint y,

+                            GLubyte rgba[][4] )

+{

+   STARTPROFILE

+   UINT i;

+   COLORREF Color;

+   HDC DC=DD_GETDC;

+   assert(Current->rgb_flag==GL_TRUE);

+   /*   y=FLIP(y);*/

+   y = Current->height - y - 1;

+   for (i=0; i<n; i++) {

+      Color=GetPixel(DC,x+i,y);

+      rgba[i][RCOMP] = GetRValue(Color);

+      rgba[i][GCOMP] = GetGValue(Color);

+      rgba[i][BCOMP] = GetBValue(Color);

+      rgba[i][ACOMP] = 255;

+   }

+   DD_RELEASEDC;

+// Brian P. Has mentioned to comment this out.

+//   memset(alpha,0,n*sizeof(GLubyte));

+   ENDPROFILE(read_rgba_span)

+}

+

+

+/* Read an array of color pixels. */

+static void read_rgba_pixels( const GLcontext* ctx,

+                              GLuint n, const GLint x[], const GLint y[],

+                              GLubyte rgba[][4], const GLubyte mask[] )

+{

+   STARTPROFILE

+   GLuint i;

+   COLORREF Color;

+   HDC DC=DD_GETDC;

+   assert(Current->rgb_flag==GL_TRUE);

+   for (i=0; i<n; i++) {

+      if (mask[i]) {

+         GLint y2 = Current->height - y[i] - 1;

+         Color=GetPixel(DC,x[i],y2);

+         rgba[i][RCOMP] = GetRValue(Color);

+         rgba[i][GCOMP] = GetGValue(Color);

+         rgba[i][BCOMP] = GetBValue(Color);

+         rgba[i][ACOMP] = 255;

+      }

+   }

+   DD_RELEASEDC;

+// Brian P. has mentioned to comment this out.

+//   memset(alpha,0,n*sizeof(GLint));

+   ENDPROFILE(read_rgba_pixels)

+}

+

+

+

+/**********************************************************************/

+/**********************************************************************/

+

+

+static const GLubyte *get_string(GLcontext *ctx, GLenum name)

+{

+   if (name == GL_RENDERER) {

+      return (GLubyte *) "Mesa Windows";

+   }

+   else {

+      return NULL;

+   }

+}

+

+

+

+void setup_DD_pointers( GLcontext* ctx )

+{

+#if 0

+    ctx->Driver.GetString = get_string;

+    ctx->Driver.UpdateState = setup_DD_pointers;

+    ctx->Driver.GetBufferSize = buffer_size;

+    ctx->Driver.Finish = finish;

+    ctx->Driver.Flush = flush;

+

+    ctx->Driver.ClearIndex = clear_index;

+    ctx->Driver.ClearColor = clear_color;

+    ctx->Driver.Clear = clear;

+

+    ctx->Driver.Enable = enable;

+

+    ctx->Driver.SetDrawBuffer = set_draw_buffer;

+    ctx->Driver.SetReadBuffer = set_read_buffer;

+    ctx->Driver.GetBufferSize = buffer_size;

+

+    ctx->Driver.PointsFunc = choose_points_function(ctx);

+    ctx->Driver.LineFunc = choose_line_function(ctx);

+    ctx->Driver.TriangleFunc = choose_triangle_function( ctx );

+

+    /* Pixel/span writing functions: */

+	ctx->Driver.WriteRGBASpan        = write_rgba_span;

+    ctx->Driver.WriteRGBSpan         = write_rgb_span;

+    ctx->Driver.WriteMonoRGBASpan    = write_mono_rgba_span;

+    ctx->Driver.WriteRGBAPixels      = write_rgba_pixels;

+    ctx->Driver.WriteMonoRGBAPixels  = write_mono_rgba_pixels;

+    ctx->Driver.WriteCI32Span        = write_ci32_span;

+    ctx->Driver.WriteCI8Span         = write_ci8_span;

+    ctx->Driver.WriteMonoCISpan      = write_mono_ci_span;

+    ctx->Driver.WriteCI32Pixels      = write_ci32_pixels;

+    ctx->Driver.WriteMonoCIPixels    = write_mono_ci_pixels;

+

+    ctx->Driver.ReadCI32Span        = read_ci32_span;

+    ctx->Driver.ReadRGBASpan        = read_rgba_span;

+    ctx->Driver.ReadCI32Pixels      = read_ci32_pixels;

+    ctx->Driver.ReadRGBAPixels      = read_rgba_pixels;

+#endif

+}

+

+

+/**********************************************************************/

+/*****                  WMesa API Functions                       *****/

+/**********************************************************************/

+

+

+

+#define PAL_SIZE 256

+static void GetPalette(HPALETTE Pal,RGBQUAD *aRGB)

+{

+    STARTPROFILE

+        int i;

+    HDC hdc;

+    struct

+    {

+        WORD Version;

+        WORD NumberOfEntries;

+        PALETTEENTRY aEntries[PAL_SIZE];

+    } Palette =

+    {

+        0x300,

+            PAL_SIZE

+    };

+    hdc=GetDC(NULL);

+    if (Pal!=NULL)

+        GetPaletteEntries(Pal,0,PAL_SIZE,Palette.aEntries);

+    else

+        GetSystemPaletteEntries(hdc,0,PAL_SIZE,Palette.aEntries);

+    if (GetSystemPaletteUse(hdc) == SYSPAL_NOSTATIC)

+    {

+        for(i = 0; i <PAL_SIZE; i++)

+            Palette.aEntries[i].peFlags = PC_RESERVED;

+        Palette.aEntries[255].peRed = 255;

+        Palette.aEntries[255].peGreen = 255;

+        Palette.aEntries[255].peBlue = 255;

+        Palette.aEntries[255].peFlags = 0;

+        Palette.aEntries[0].peRed = 0;

+        Palette.aEntries[0].peGreen = 0;

+        Palette.aEntries[0].peBlue = 0;

+        Palette.aEntries[0].peFlags = 0;

+    }

+    else

+    {

+        int nStaticColors;

+        int nUsableColors;

+        nStaticColors = GetDeviceCaps(hdc, NUMCOLORS)/2;

+        for (i=0; i<nStaticColors; i++)

+            Palette.aEntries[i].peFlags = 0;

+        nUsableColors = PAL_SIZE-nStaticColors;

+        for (; i<nUsableColors; i++)

+            Palette.aEntries[i].peFlags = PC_RESERVED;

+        for (; i<PAL_SIZE-nStaticColors; i++)

+            Palette.aEntries[i].peFlags = PC_RESERVED;

+        for (i=PAL_SIZE-nStaticColors; i<PAL_SIZE; i++)

+            Palette.aEntries[i].peFlags = 0;

+    }

+    ReleaseDC(NULL,hdc);

+    for (i=0; i<PAL_SIZE; i++)

+    {

+        aRGB[i].rgbRed=Palette.aEntries[i].peRed;

+        aRGB[i].rgbGreen=Palette.aEntries[i].peGreen;

+        aRGB[i].rgbBlue=Palette.aEntries[i].peBlue;

+        aRGB[i].rgbReserved=Palette.aEntries[i].peFlags;

+    }

+    ENDPROFILE(GetPalette)

+}

+

+

+WMesaContext WMesaCreateContext( HWND hWnd, HPALETTE* Pal,

+                                GLboolean rgb_flag,

+                                GLboolean db_flag )

+{

+    RECT CR;

+    WMesaContext c;

+    GLboolean true_color_flag;

+    c = (struct wmesa_context * ) calloc(1,sizeof(struct wmesa_context));

+    if (!c)

+        return NULL;

+

+    c->Window=hWnd;

+    c->hDC = GetDC(hWnd);

+    true_color_flag = GetDeviceCaps(c->hDC, BITSPIXEL) > 8;

+#ifdef DDRAW

+    if(true_color_flag) c->rgb_flag = rgb_flag = GL_TRUE;

+#endif

+

+

+#ifdef DITHER

+    if ((true_color_flag==GL_FALSE) && (rgb_flag == GL_TRUE)){

+        c->dither_flag = GL_TRUE;

+        c->hPalHalfTone = WinGCreateHalftonePalette();

+    }

+    else

+        c->dither_flag = GL_FALSE;

+#else

+    c->dither_flag = GL_FALSE;

+#endif

+

+

+    if (rgb_flag==GL_FALSE)

+    {

+        c->rgb_flag = GL_FALSE;

+        //    c->pixel = 1;

+        c->db_flag = db_flag =GL_TRUE; // WinG requires double buffering

+        printf("Single buffer is not supported in color index mode, setting to double buffer.\n");

+    }

+    else

+    {

+        c->rgb_flag = GL_TRUE;

+        //    c->pixel = 0;

+    }

+    GetClientRect(c->Window,&CR);

+    c->width=CR.right;

+    c->height=CR.bottom;

+    if (db_flag)

+    {

+        c->db_flag = 1;

+        /* Double buffered */

+#ifndef DDRAW

+        //  if (c->rgb_flag==GL_TRUE && c->dither_flag != GL_TRUE )

+        {

+            wmCreateBackingStore(c, c->width, c->height);

+

+        }

+#endif

+    }

+    else

+    {

+        /* Single Buffered */

+        if (c->rgb_flag)

+            c->db_flag = 0;

+    }

+#ifdef DDRAW

+    if (DDInit(c,hWnd) == GL_FALSE) {

+        free( (void *) c );

+        exit(1);

+    }

+#endif

+

+

+    c->gl_visual = _mesa_create_visual(rgb_flag,

+                                       db_flag,    /* db_flag */

+                                       GL_FALSE,   /* stereo */

+                                       8,8,8,8,    /* r, g, b, a bits */

+                                       0,          /* index bits */

+                                       16,         /* depth_bits */

+                                       8,          /* stencil_bits */

+                                       16,16,16,16,/* accum_bits */

+                                       1);

+

+    if (!c->gl_visual) {

+        return NULL;

+    }

+

+    /* allocate a new Mesa context */

+    c->gl_ctx = _mesa_create_context( c->gl_visual, NULL, c, GL_TRUE);

+

+    if (!c->gl_ctx) {

+        _mesa_destroy_visual( c->gl_visual );

+        free(c);

+        return NULL;

+    }

+

+    _mesa_enable_sw_extensions(c->gl_ctx);

+#if 0

+    c->gl_buffer = _mesa_create_framebuffer( c->gl_visual,

+                                          c->gl_visual->DepthBits > 0,

+                                          c->gl_visual->StencilBits > 0,

+                                          c->gl_visual->AccumRedBits > 0,

+					  c->gl_visual->AlphaBits > 0 );

+#endif

+    c->gl_buffer = NULL; /* TEMP */

+    if (!c->gl_buffer) {

+        _mesa_destroy_visual( c->gl_visual );

+        _mesa_destroy_context( c->gl_ctx );

+        free(c);

+        return NULL;

+    }

+

+	c->gl_ctx->Driver.UpdateState = setup_DD_pointers;

+

+    //  setup_DD_pointers(c->gl_ctx);

+

+    return c;

+}

+

+void WMesaDestroyContext( void )

+{

+    WMesaContext c = Current;

+    ReleaseDC(c->Window,c->hDC);

+    WC = c;

+    if(c->hPalHalfTone != NULL)

+        DeleteObject(c->hPalHalfTone);

+    _mesa_destroy_visual( c->gl_visual );

+    _mesa_destroy_framebuffer( c->gl_buffer );

+    _mesa_destroy_context( c->gl_ctx );

+

+    if (c->db_flag)

+#ifdef DDRAW

+        DDFree(c);

+#else

+    wmDeleteBackingStore(c);

+#endif

+    free( (void *) c );

+    //Following code is added to enable parallel render

+    // Parallel render only work in double buffer mode

+#if !defined(NO_PARALLEL)

+    if(parallelMachine)

+        PRDestroyRenderBuffer();

+#endif

+    // End modification

+}

+

+

+

+void /*APIENTRY*/ WMesaMakeCurrent( WMesaContext c )

+{

+    if(!c){

+        Current = c;

+        return;

+    }

+

+    //

+    // A little optimization

+    // If it already is current,

+    // don't set it again

+    //

+    if(Current == c)

+        return;

+

+    //gl_set_context( c->gl_ctx );

+    _mesa_make_current(c->gl_ctx, c->gl_buffer);

+    setup_DD_pointers(c->gl_ctx);

+    Current = c;

+    if (Current->gl_ctx->Viewport.Width==0) {

+        /* initialize viewport to window size */

+        _mesa_set_viewport( Current->gl_ctx,

+            0, 0, Current->width, Current->height );

+    }

+    if ((c->cColorBits <= 8 ) && (c->rgb_flag == GL_TRUE)){

+        WMesaPaletteChange(c->hPalHalfTone);

+    }

+}

+

+

+

+void /*APIENTRY*/ WMesaSwapBuffers( void )

+{

+    HDC DC = Current->hDC;

+    GET_CURRENT_CONTEXT(ctx);

+

+    /* If we're swapping the buffer associated with the current context

+     * we have to flush any pending rendering commands first.

+    */

+    if (Current && Current->gl_ctx == ctx)

+       _mesa_swapbuffers(ctx);

+

+    if (Current->db_flag)

+        wmFlush(Current);

+}

+

+

+

+void /*APIENTRY*/ WMesaPaletteChange(HPALETTE Pal)

+{

+    int vRet;

+    LPPALETTEENTRY pPal;

+    if (Current && (Current->rgb_flag==GL_FALSE || Current->dither_flag == GL_TRUE))

+    {

+        pPal = (PALETTEENTRY *)malloc( 256 * sizeof(PALETTEENTRY));

+        Current->hPal=Pal;

+        //  GetPaletteEntries( Pal, 0, 256, pPal );

+        GetPalette( Pal, pPal );

+#ifdef DDRAW

+        Current->lpDD->lpVtbl->CreatePalette(Current->lpDD,DDPCAPS_8BIT,

+            pPal, &(Current->lpDDPal), NULL);

+        if (Current->lpDDPal)

+            Current->lpDDSPrimary->lpVtbl->SetPalette(Current->lpDDSPrimary,Current->lpDDPal);

+#else

+        vRet = SetDIBColorTable(Current->dib.hDC,0,256,pPal);

+#endif

+        free( pPal );

+    }

+

+}

+

+

+

+

+static unsigned char threeto8[8] = {

+    0, 0111>>1, 0222>>1, 0333>>1, 0444>>1, 0555>>1, 0666>>1, 0377

+};

+

+static unsigned char twoto8[4] = {

+    0, 0x55, 0xaa, 0xff

+};

+

+static unsigned char oneto8[2] = {

+    0, 255

+};

+

+static unsigned char componentFromIndex(UCHAR i, UINT nbits, UINT shift)

+{

+    unsigned char val;

+

+    val = i >> shift;

+    switch (nbits) {

+

+    case 1:

+        val &= 0x1;

+        return oneto8[val];

+

+    case 2:

+        val &= 0x3;

+        return twoto8[val];

+

+    case 3:

+        val &= 0x7;

+        return threeto8[val];

+

+    default:

+        return 0;

+    }

+}

+

+void /*WINAPI*/ wmCreatePalette( PWMC pwdc )

+{

+    /* Create a compressed and re-expanded 3:3:2 palette */

+    int            i;

+    LOGPALETTE     *pPal;

+    BYTE           rb, rs, gb, gs, bb, bs;

+

+    pwdc->nColors = 0x100;

+

+    pPal = (PLOGPALETTE)malloc(sizeof(LOGPALETTE) + pwdc->nColors * sizeof(PALETTEENTRY));

+    memset( pPal, 0, sizeof(LOGPALETTE) + pwdc->nColors * sizeof(PALETTEENTRY) );

+

+    pPal->palVersion = 0x300;

+

+    rb = REDBITS;

+    rs = REDSHIFT;

+    gb = GREENBITS;

+    gs = GREENSHIFT;

+    bb = BLUEBITS;

+    bs = BLUESHIFT;

+

+    if (pwdc->db_flag) {

+

+        /* Need to make two palettes: one for the screen DC and one for the DIB. */

+        pPal->palNumEntries = pwdc->nColors;

+        for (i = 0; i < pwdc->nColors; i++) {

+            pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs );

+            pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs );

+            pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs );

+            pPal->palPalEntry[i].peFlags = 0;

+        }

+        pwdc->hGLPalette = CreatePalette( pPal );

+        pwdc->hPalette = CreatePalette( pPal );

+    }

+

+    else {

+        pPal->palNumEntries = pwdc->nColors;

+        for (i = 0; i < pwdc->nColors; i++) {

+            pPal->palPalEntry[i].peRed = componentFromIndex( i, rb, rs );

+            pPal->palPalEntry[i].peGreen = componentFromIndex( i, gb, gs );

+            pPal->palPalEntry[i].peBlue = componentFromIndex( i, bb, bs );

+            pPal->palPalEntry[i].peFlags = 0;

+        }

+        pwdc->hGLPalette = CreatePalette( pPal );

+    }

+

+    free(pPal);

+

+}

+

+void /*WINAPI*/ wmSetPixel(PWMC pwc, int iScanLine, int iPixel, BYTE r, BYTE g, BYTE b)

+{

+    if (Current->db_flag) {

+        LPBYTE  lpb = pwc->pbPixels;

+        LPDWORD lpdw;

+        LPWORD  lpw;

+        UINT    nBypp = pwc->cColorBits >> 3;

+        UINT    nOffset = iPixel % nBypp;

+

+        // Move the pixel buffer pointer to the scanline that we

+        // want to access

+

+        //      pwc->dib.fFlushed = FALSE;

+

+        lpb += pwc->ScanWidth * iScanLine;

+        // Now move to the desired pixel

+        lpb += iPixel * nBypp;

+        lpb = PIXELADDR(iPixel, iScanLine);

+        lpdw = (LPDWORD)lpb;

+        lpw = (LPWORD)lpb;

+

+        if(nBypp == 1){

+            if(pwc->dither_flag)

+                *lpb = DITHER_RGB_2_8BIT(r,g,b,iScanLine,iPixel);

+            else

+                *lpb = BGR8(r,g,b);

+        }

+        else if(nBypp == 2)

+            *lpw = BGR16(r,g,b);

+        else if (nBypp == 3){

+            *lpdw = BGR24(r,g,b);

+        }

+        else if (nBypp == 4)

+            *lpdw = BGR32(r,g,b);

+    }

+    else{

+        SetPixel(Current->hDC, iPixel, iScanLine, RGB(r,g,b));

+        DD_RELEASEDC;

+    }

+}

+

+void /*WINAPI*/ wmCreateDIBSection(

+                                   HDC   hDC,

+                                   PWMC pwc,    // handle of device context

+                                   CONST BITMAPINFO *pbmi,  // address of structure containing bitmap size, format, and color data

+                                   UINT iUsage  // color data type indicator: RGB values or palette indices

+                                   )

+{

+    DWORD   dwSize = 0;

+    DWORD   dwScanWidth;

+    UINT    nBypp = pwc->cColorBits / 8;

+    HDC     hic;

+

+    dwScanWidth = (((pwc->ScanWidth * nBypp)+ 3) & ~3);

+

+    pwc->ScanWidth =pwc->pitch = dwScanWidth;

+

+    if (stereo_flag)

+        pwc->ScanWidth = 2* pwc->pitch;

+

+    dwSize = sizeof(BITMAPINFO) + (dwScanWidth * pwc->height);

+

+    pwc->dib.hFileMap = CreateFileMapping((HANDLE)PAGE_FILE,

+        NULL,

+        PAGE_READWRITE | SEC_COMMIT,

+        0,

+        dwSize,

+        NULL);

+

+    if (!pwc->dib.hFileMap)

+        return;

+

+    pwc->dib.base = MapViewOfFile(pwc->dib.hFileMap,

+        FILE_MAP_ALL_ACCESS,

+        0,

+        0,

+        0);

+

+    if(!pwc->dib.base){

+        CloseHandle(pwc->dib.hFileMap);

+        return;

+    }

+

+    //  pwc->pbPixels = pwc->addrOffScreen = ((LPBYTE)pwc->dib.base) + sizeof(BITMAPINFO);

+

+    //  pwc->dib.hDC = CreateCompatibleDC(hDC);

+

+    CopyMemory(pwc->dib.base, pbmi, sizeof(BITMAPINFO));

+

+    hic = CreateIC("display", NULL, NULL, NULL);

+    pwc->dib.hDC = CreateCompatibleDC(hic);

+

+

+    /*  pwc->hbmDIB = CreateDIBitmap(hic,

+    &(pwc->bmi.bmiHeader),

+    CBM_INIT,

+    pwc->pbPixels,

+    &(pwc->bmi),

+    DIB_RGB_COLORS);

+    */

+    pwc->hbmDIB = CreateDIBSection(hic,

+        &(pwc->bmi),

+        (iUsage ? DIB_PAL_COLORS : DIB_RGB_COLORS),

+        &(pwc->pbPixels),

+        pwc->dib.hFileMap,

+        0);

+        /*

+        pwc->hbmDIB = CreateDIBSection(hic,

+        &(pwc->bmi),

+        DIB_RGB_COLORS,

+        &(pwc->pbPixels),

+        pwc->dib.hFileMap,

+        0);

+    */

+    pwc->ScreenMem = pwc->addrOffScreen = pwc->pbPixels;

+    pwc->hOldBitmap = SelectObject(pwc->dib.hDC, pwc->hbmDIB);

+

+    DeleteDC(hic);

+

+    return;

+

+}

+

+//

+// Blit memory DC to screen DC

+//

+BOOL /*WINAPI*/ wmFlush(PWMC pwc)

+{

+    BOOL    bRet = 0;

+    DWORD   dwErr = 0;

+#ifdef DDRAW

+    HRESULT             ddrval;

+#endif

+

+    // Now search through the torus frames and mark used colors

+    if(pwc->db_flag){

+#ifdef DDRAW

+        if (pwc->lpDDSOffScreen == NULL)

+            if(DDCreateOffScreen(pwc) == GL_FALSE)

+                return;

+

+            pwc->lpDDSOffScreen->lpVtbl->Unlock(pwc->lpDDSOffScreen, NULL);

+

+            while( 1 )

+            {

+                ddrval = pwc->lpDDSPrimary->lpVtbl->Blt( pwc->lpDDSPrimary,

+                    &(pwc->rectSurface), pwc->lpDDSOffScreen, &(pwc->rectOffScreen), 0, NULL );

+

+                if( ddrval == DD_OK )

+                {

+                    break;

+                }

+                if( ddrval == DDERR_SURFACELOST )

+                {

+                    if(!DDRestoreAll(pwc))

+                    {

+                        break;

+                    }

+                }

+                if( ddrval != DDERR_WASSTILLDRAWING )

+                {

+                    break;

+                }

+            }

+

+            while (pwc->lpDDSOffScreen->lpVtbl->Lock(pwc->lpDDSOffScreen,

+                NULL, &(pwc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)

+                ;

+

+            if(ddrval != DD_OK)

+                dwErr = GetLastError();

+#else

+            bRet = BitBlt(pwc->hDC, 0, 0, pwc->width, pwc->height,

+                pwc->dib.hDC, 0, 0, SRCCOPY);

+#endif

+    }

+

+    return(TRUE);

+

+}

+

+

+// The following code is added by Li Wei to enable stereo display

+

+#if !defined(NO_STEREO)

+

+void WMesaShowStereo(GLuint list)

+{

+

+    GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;

+    GLfloat cm[16];

+    GLint matrix_mode;

+    // Must use double Buffer

+    if( ! Current-> db_flag )

+        return;

+

+

+    glGetIntegerv(GL_MATRIX_MODE,&matrix_mode);

+

+    //  glPushMatrix();  //****

+    WMesaViewport(Current->gl_ctx,0,Current->height/2,Current->width,Current->height/2);

+    //  Current->gl_ctx->NewState = 0;

+

+    //  glViewport(0,0,Current->width,Current->height/2);

+    if(matrix_mode!=GL_MODELVIEW)

+        glMatrixMode(GL_MODELVIEW);

+

+    glGetFloatv(GL_MODELVIEW_MATRIX,cm);

+    glLoadIdentity();

+    gluLookAt(viewDistance/2,0.0,0.0 ,

+        viewDistance/2,0.0,-1.0,

+        0.0,1.0,0.0 );

+    //  glTranslatef(viewDistance/2.0,0.,0.);

+    glMultMatrixf( cm );

+

+    Current->ScreenMem = Current->pbPixels = Current->addrOffScreen;

+    //glPushMatrix();

+    glCallList( list );

+    //glPopMatrix();

+

+    glGetFloatv(GL_MODELVIEW_MATRIX,cm);

+    glLoadIdentity();

+    gluLookAt(-viewDistance/2,0.0,0.0 ,

+        -viewDistance/2,0.0,-1.0,

+        0.0,1.0,0.0 );

+    //  glTranslatef(-viewDistance/2.0,0.,0.);

+    glMultMatrixf(cm);

+

+    Current->ScreenMem = Current->pbPixels = Current->addrOffScreen + Current->pitch;

+    glCallList(list);

+    if(matrix_mode!=GL_MODELVIEW)

+        glMatrixMode(matrix_mode);

+

+    //  glPopMatrix();

+    glFlush();

+

+    WMesaViewport(Current->gl_ctx,0,0,Current->width,Current->height);

+    //  Current->gl_ctx->NewState = 0;

+    WMesaSwapBuffers();

+

+}

+

+void toggleStereoMode()

+{

+    if(!Current->db_flag)

+        return;

+    if(!stereo_flag){

+        stereo_flag = 1;

+        if(stereoBuffer==GL_FALSE)

+#if !defined(NO_PARALLEL)

+            if(!parallelFlag)

+#endif

+            {

+                Current->ScanWidth = Current->pitch*2;

+            }

+    }

+    else {

+        stereo_flag = 0;

+#if !defined(NO_PARALLEL)

+        if(!parallelFlag)

+#endif

+            Current->ScanWidth = Current->pitch;

+        Current->pbPixels = Current->addrOffScreen;

+    }

+}

+

+/* if in stereo mode, the following function is called */

+void glShowStereo(GLuint list)

+{

+    WMesaShowStereo(list);

+}

+

+#endif // End if NO_STEREO not defined

+

+#if !defined(NO_PARALLEL)

+

+void toggleParallelMode(void)

+{

+    if(!parallelFlag){

+        parallelFlag = GL_TRUE;

+        if(parallelMachine==GL_FALSE){

+            PRCreateRenderBuffer( Current->rgb_flag? GL_RGBA :GL_COLOR_INDEX,

+                Current->cColorBits/8,

+                Current->width ,Current->height,

+                Current->ScanWidth,

+                Current->rgb_flag? Current->pbPixels: Current->ScreenMem);

+            parallelMachine = GL_TRUE;

+        }

+    }

+    else {

+        parallelFlag = GL_FALSE;

+        if(parallelMachine==GL_TRUE){

+            PRDestroyRenderBuffer();

+            parallelMachine=GL_FALSE;

+            ReadyForNextFrame = GL_TRUE;

+        }

+

+        /***********************************************

+        // Seems something wrong!!!!

+        ************************************************/

+

+        WMesaMakeCurrent(Current);

+#if !defined(NO_STEREO)

+        stereo_flag = GL_FALSE ;

+#endif

+    }

+}

+

+void PRShowRenderResult(void)

+{

+    int flag = 0;

+    if(!glImageRendered())

+        return;

+

+    if (parallelFlag)

+    {

+        WMesaSwapBuffers();

+    }

+

+}

+#endif //End if NO_PARALLEL not defined

+

+//end modification

+

+BYTE DITHER_RGB_2_8BIT( int red, int green, int blue, int pixel, int scanline)

+{

+    char unsigned redtemp, greentemp, bluetemp, paletteindex;

+

+    //*** now, look up each value in the halftone matrix

+    //*** using an 8x8 ordered dither.

+    redtemp = aDividedBy51[red]

+        + (aModulo51[red] > aHalftone8x8[(pixel%8)*8

+        + scanline%8]);

+    greentemp = aDividedBy51[(char unsigned)green]

+        + (aModulo51[green] > aHalftone8x8[

+        (pixel%8)*8 + scanline%8]);

+    bluetemp = aDividedBy51[(char unsigned)blue]

+        + (aModulo51[blue] > aHalftone8x8[

+        (pixel%8)*8 +scanline%8]);

+

+    //*** recombine the halftoned rgb values into a palette index

+    paletteindex =

+        redtemp + aTimes6[greentemp] + aTimes36[bluetemp];

+

+    //*** and translate through the wing halftone palette

+    //*** translation vector to give the correct value.

+    return aWinGHalftoneTranslation[paletteindex];

+}

+

+#ifdef DDRAW

+/*

+* restoreAll

+*

+* restore all lost objects

+*/

+HRESULT DDRestoreAll( WMesaContext wc )

+{

+    HRESULT     ddrval;

+

+    ddrval = wc->lpDDSPrimary->lpVtbl->Restore(wc->lpDDSPrimary);

+    if( ddrval == DD_OK )

+    {

+        ddrval = wc->lpDDSOffScreen->lpVtbl->Restore(wc->lpDDSOffScreen);

+    }

+    return ddrval;

+

+} /* restoreAll */

+

+

+  /*

+  * This function is called if the initialization function fails

+*/

+BOOL initFail( HWND hwnd, WMesaContext wc )

+{

+    DDFree(wc);

+    MessageBox( hwnd, "DirectDraw Init FAILED", "", MB_OK );

+    return FALSE;

+

+} /* initFail */

+

+

+static void DDDeleteOffScreen(WMesaContext wc)

+{

+    if( wc->lpDDSOffScreen != NULL )

+    {

+        wc->lpDDSOffScreen->lpVtbl->Unlock(wc->lpDDSOffScreen,NULL);

+        wc->lpDDSOffScreen->lpVtbl->Release(wc->lpDDSOffScreen);

+        wc->lpDDSOffScreen = NULL;

+    }

+

+}

+

+static void DDFreePrimarySurface(WMesaContext wc)

+{

+    if( wc->lpDDSPrimary != NULL )

+    {

+        if(wc->db_flag == GL_FALSE)

+            wc->lpDDSPrimary->lpVtbl->ReleaseDC(wc->lpDDSPrimary, wc->hDC);

+        wc->lpDDSPrimary->lpVtbl->Release(wc->lpDDSPrimary);

+        wc->lpDDSPrimary = NULL;

+    }

+}

+

+static BOOL DDCreatePrimarySurface(WMesaContext wc)

+{

+    HRESULT ddrval;

+    DDSCAPS             ddscaps;

+    wc->ddsd.dwSize = sizeof( wc->ddsd );

+    wc->ddsd.dwFlags = DDSD_CAPS;

+    wc->ddsd.ddsCaps.dwCaps =   DDSCAPS_PRIMARYSURFACE;

+

+    ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD,&(wc->ddsd), &(wc->lpDDSPrimary), NULL );

+    if( ddrval != DD_OK )

+    {

+        return initFail(wc->hwnd , wc);

+    }

+    if(wc->db_flag == GL_FALSE)

+        wc->lpDDSPrimary->lpVtbl->GetDC(wc->lpDDSPrimary, wc->hDC);

+    return TRUE;

+}

+

+static BOOL DDCreateOffScreen(WMesaContext wc)

+{

+    POINT   pt;

+    HRESULT     ddrval;

+    if(wc->lpDD == NULL)

+        return FALSE;

+    GetClientRect( wc->hwnd, &(wc->rectOffScreen) );

+    wc->ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;

+    wc->ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;

+    wc->ddsd.dwHeight = wc->rectOffScreen.bottom - wc->rectOffScreen.top;

+    wc->ddsd.dwWidth = wc->rectOffScreen.right - wc->rectOffScreen.left;

+

+    ddrval = wc->lpDD->lpVtbl->CreateSurface( wc->lpDD, &(wc->ddsd), &(wc->lpDDSOffScreen), NULL );

+    if( ddrval != DD_OK )

+    {

+        return FALSE;

+    }

+

+    while (wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), 0, NULL) == DDERR_WASSTILLDRAWING)

+        ;

+    //  while ((ddrval = wc->lpDDSOffScreen->lpVtbl->Lock(wc->lpDDSOffScreen,NULL, &(wc->ddsd), DDLOCK_SURFACEMEMORYPTR , NULL)) != DD_OK)

+    ;

+    if(wc->ddsd.lpSurface==NULL)

+        return initFail(wc->hwnd, wc);

+

+    wc->ScreenMem = wc->pbPixels = wc->addrOffScreen = (PBYTE)(wc->ddsd.lpSurface);

+    wc->ScanWidth = wc->pitch = wc->ddsd.lPitch;

+    if (stereo_flag)

+        wc->ScanWidth = wc->ddsd.lPitch*2;

+

+    GetClientRect( wc->hwnd, &(wc->rectSurface) );

+    pt.x = pt.y = 0;

+    ClientToScreen( wc->hwnd, &pt );

+    OffsetRect(&(wc->rectSurface), pt.x, pt.y);

+    wmSetPixelFormat(wc, wc->hDC);

+    return TRUE;

+}

+

+/*

+* doInit - do work required for every instance of the application:

+*                create the window, initialize data

+*/

+static BOOL DDInit( WMesaContext wc, HWND hwnd)

+{

+    HRESULT             ddrval;

+    DWORD dwFrequency;

+

+    LPDIRECTDRAW            lpDD;           // DirectDraw object

+    LPDIRECTDRAW2            lpDD2;

+

+

+    wc->fullScreen = displayOptions.fullScreen;

+    wc->gMode = displayOptions.mode;

+    wc->hwnd = hwnd;

+    stereo_flag = displayOptions.stereo;

+    if(wc->db_flag!= GL_TRUE)

+        stereo_flag = GL_FALSE;

+        /*

+        * create the main DirectDraw object

+    */

+    ddrval = DirectDrawCreate( NULL, &(wc->lpDD), NULL );

+    if( ddrval != DD_OK )

+    {

+        return initFail(hwnd,wc);

+    }

+

+    // Get exclusive mode if requested

+    if(wc->fullScreen)

+    {

+        ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN );

+    }

+    else

+    {

+        ddrval = wc->lpDD->lpVtbl->SetCooperativeLevel( wc->lpDD, hwnd, DDSCL_NORMAL );

+    }

+    if( ddrval != DD_OK )

+    {

+        return initFail(hwnd , wc);

+    }

+

+

+    /*  ddrval = wc->lpDD->lpVtbl->QueryInterface(wc->lpDD, IID_IDirectDraw2,

+    (LPVOID *)((wc->lpDD2)));

+

+    */

+    if(ddrval != DD_OK)

+        return initFail(hwnd , wc);

+

+

+    //ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));

+    //  wc->lpDD2->lpVtbl->GetMonitorFrequency(wc->lpDD, &dwFrequency);

+    switch( wc->gMode )

+    {

+    case 1:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 640, 480, displayOptions.bpp); break;

+    case 2:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 800, 600, displayOptions.bpp); break;

+    case 3:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1024, 768, displayOptions.bpp); break;

+    case 4:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1152, 864, displayOptions.bpp); break;

+    case 5:  ddrval = wc->lpDD->lpVtbl->SetDisplayMode( wc->lpDD, 1280, 1024, displayOptions.bpp); break;

+    }

+

+    if( ddrval != DD_OK )

+    {

+        printf("Can't modify display mode, current mode used\n");

+        //        return initFail(hwnd , wc);

+    }

+    //ddrval = wc->lpDD->lpVtbl->GetDisplayMode( wc->lpDD, &(wc->ddsd));

+    switch(ddrval){

+    case DDERR_INVALIDOBJECT:

+        break;

+    case DDERR_INVALIDPARAMS:

+        break;

+    case DDERR_UNSUPPORTEDMODE:

+        ;

+    }

+

+    if(DDCreatePrimarySurface(wc) == GL_FALSE)

+        return initFail(hwnd, wc);

+

+    if(wc->db_flag)

+        return DDCreateOffScreen(wc);

+} /* DDInit */

+

+static void DDFree( WMesaContext wc)

+{

+    if( wc->lpDD != NULL )

+    {

+        DDFreePrimarySurface(wc);

+        DDDeleteOffScreen(wc);

+        wc->lpDD->lpVtbl->Release(wc->lpDD);

+        wc->lpDD = NULL;

+    }

+    // Clean up the screen on exit

+    RedrawWindow( NULL, NULL, NULL, RDW_INVALIDATE | RDW_ERASE |

+        RDW_ALLCHILDREN );

+

+}

+#endif

+

+void WMesaMove(void)

+{

+    WMesaContext wc = Current;

+    POINT   pt;

+    if (Current != NULL){

+        GetClientRect( wc->hwnd, &(wc->rectSurface) );

+        pt.x = pt.y = 0;

+        ClientToScreen( wc->hwnd, &pt );

+        OffsetRect(&(wc->rectSurface), pt.x, pt.y);

+    }

+}

+

+

+

+/*

+* Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable

+* shortcut.

+*/

+#define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )

+

+

+/**********************************************************************/

+/***                   Triangle rendering                            ***/

+/**********************************************************************/

+

+/*

+ * XImage, smooth, depth-buffered, PF_8A8B8G8R triangle.

+ */

+static void smooth_8A8B8G8R_z_triangle( GLcontext *ctx,

+                                       GLuint v0, GLuint v1, GLuint v2,

+                                       GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint i, len = RIGHT-LEFT;                      \

+    for (i=0;i<len;i++) {                       \

+    GLdepth z = FixedToDepth(ffz);                  \

+    if (z < zRow[i]) {                      \

+    pRow[i] = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg),    \

+    FixedToInt(ffb) );          \

+    zRow[i] = z;                            \

+    }                                   \

+    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    ffz += fdzdx;                           \

+    }                                   \

+    }

+

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, smooth, depth-buffered, PF_8R8G8B triangle.

+*/

+static void smooth_8R8G8B_z_triangle( GLcontext *ctx,

+                                     GLuint v0, GLuint v1, GLuint v2,

+                                     GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint i, len = RIGHT-LEFT;                      \

+    for (i=0;i<len;i++) {                       \

+    GLdepth z = FixedToDepth(ffz);                  \

+    if (z < zRow[i]) {                      \

+    pRow[i] = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg),    \

+    FixedToInt(ffb) );          \

+    zRow[i] = z;                            \

+    }                                   \

+    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    ffz += fdzdx;                           \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+

+/*

+* XImage, smooth, depth-buffered, PF_5R6G5B triangle.

+*/

+static void smooth_5R6G5B_z_triangle( GLcontext *ctx,

+                                     GLuint v0, GLuint v1, GLuint v2,

+                                     GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)

+#define PIXEL_TYPE GLushort

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint i, len = RIGHT-LEFT;                      \

+    for (i=0;i<len;i++) {                       \

+    GLdepth z = FixedToDepth(ffz);                  \

+    if (z < zRow[i]) {                      \

+    pRow[i] = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg),    \

+    FixedToInt(ffb) );          \

+    zRow[i] = z;                            \

+    }                                   \

+    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    ffz += fdzdx;                           \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+/*

+* XImage, flat, depth-buffered, PF_8A8B8G8R triangle.

+*/

+static void flat_8A8B8G8R_z_triangle( GLcontext *ctx, GLuint v0,

+                                     GLuint v1, GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_8B8G8R( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint i, len = RIGHT-LEFT;                      \

+    for (i=0;i<len;i++) {                       \

+    GLdepth z = FixedToDepth(ffz);                  \

+    if (z < zRow[i]) {                      \

+    pRow[i] = p;                            \

+    zRow[i] = z;                            \

+    }                                   \

+    ffz += fdzdx;                           \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, depth-buffered, PF_8R8G8B triangle.

+*/

+static void flat_8R8G8B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                   GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_8R8G8B( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )            \

+    {                           \

+    GLint i, len = RIGHT-LEFT;              \

+    for (i=0;i<len;i++) {               \

+    GLdepth z = FixedToDepth(ffz);          \

+    if (z < zRow[i]) {              \

+    pRow[i] = p;                    \

+    zRow[i] = z;                    \

+    }                           \

+    ffz += fdzdx;                   \

+    }                           \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, depth-buffered, PF_5R6G5B triangle.

+*/

+static void flat_5R6G5B_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                   GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)

+#define PIXEL_TYPE GLushort

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_5R6G5B( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )            \

+    {                           \

+    GLint i, len = RIGHT-LEFT;              \

+    for (i=0;i<len;i++) {               \

+    GLdepth z = FixedToDepth(ffz);          \

+    if (z < zRow[i]) {              \

+    pRow[i] = p;                    \

+    zRow[i] = z;                    \

+    }                           \

+    ffz += fdzdx;                   \

+    }                           \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, smooth, NON-depth-buffered, PF_8A8B8G8R triangle.

+*/

+static void smooth_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                     GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint xx;                               \

+    PIXEL_TYPE *pixel = pRow;                       \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \

+    *pixel = PACK_8B8G8R( FixedToInt(ffr), FixedToInt(ffg),     \

+                FixedToInt(ffb) );          \

+                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, smooth, NON-depth-buffered, PF_8R8G8B triangle.

+*/

+static void smooth_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                   GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint xx;                               \

+    PIXEL_TYPE *pixel = pRow;                       \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \

+    *pixel = PACK_8R8G8B( FixedToInt(ffr), FixedToInt(ffg),     \

+                FixedToInt(ffb) );          \

+                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, smooth, NON-depth-buffered, PF_5R6G5B triangle.

+*/

+static void smooth_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                   GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)

+#define PIXEL_TYPE GLushort

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint xx;                               \

+    PIXEL_TYPE *pixel = pRow;                       \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \

+    *pixel = PACK_5R6G5B( FixedToInt(ffr), FixedToInt(ffg),     \

+                FixedToInt(ffb) );          \

+                ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;         \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+

+/*

+* XImage, flat, NON-depth-buffered, PF_8A8B8G8R triangle.

+*/

+static void flat_8A8B8G8R_triangle( GLcontext *ctx, GLuint v0,

+                                   GLuint v1, GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_8B8G8R( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )            \

+    {                           \

+    GLint xx;                       \

+    PIXEL_TYPE *pixel = pRow;               \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \

+    *pixel = p;                 \

+    }                           \

+    }

+

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, NON-depth-buffered, PF_8R8G8B triangle.

+*/

+static void flat_8R8G8B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                 GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define PIXEL_ADDRESS(X,Y) PIXELADDR4(X,Y)

+#define PIXEL_TYPE GLuint

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_8R8G8B( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )            \

+    {                           \

+    GLint xx;                       \

+    PIXEL_TYPE *pixel = pRow;               \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \

+    *pixel = p;                 \

+    }                           \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, NON-depth-buffered, PF_5R6G5B triangle.

+*/

+static void flat_5R6G5B_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                 GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define PIXEL_ADDRESS(X,Y) PIXELADDR2(X,Y)

+#define PIXEL_TYPE GLushort

+    //#define BYTES_PER_ROW (wmesa->xm_buffer->backimage->bytes_per_line)

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE                  \

+    unsigned long p = PACK_5R6G5B( VB->ColorPtr->data[pv][0],    \

+    VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2] );

+#define INNER_LOOP( LEFT, RIGHT, Y )            \

+    {                           \

+    GLint xx;                       \

+    PIXEL_TYPE *pixel = pRow;               \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {       \

+    *pixel = p;                 \

+    }                           \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, smooth, depth-buffered, 8-bit PF_LOOKUP triangle.

+*/

+

+static void smooth_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                 GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define INTERP_INDEX 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                                \

+    {                                                                   \

+    GLint i, len = RIGHT-LEFT;                                      \

+    for (i=0;i<len;i++) {                                           \

+    GLdepth z = FixedToDepth(ffz);                              \

+    if (z < zRow[i]) {                                          \

+    pRow[i] = FixedToInt(ffi);                                  \

+    zRow[i] = z;                                                \

+    }                                                               \

+    ffi += fdidx;                                                   \

+    ffz += fdzdx;                                                   \

+    }                                                               \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, depth-buffered, 8-bit PF_LOOKUP triangle.

+*/

+

+static void flat_ci_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                               GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE			\

+   GLuint index = VB->IndexPtr->data[pv];	\

+   (*ctx->Driver.Index)( ctx, index );

+#define INNER_LOOP( LEFT, RIGHT, Y )	\

+   {					\

+      GLint i, len = RIGHT-LEFT;	\

+      for (i=0;i<len;i++) {		\

+         GLdepth z = FixedToDepth(ffz);	\

+         if (z < zRow[i]) {		\

+            pRow[i] = index;		\

+            zRow[i] = z;		\

+         }				\

+         ffz += fdzdx;			\

+      }					\

+   }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+

+/*

+* XImage, smooth, NON-depth-buffered, 8-bit PF_LOOKUP triangle.

+*/

+

+static void smooth_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                               GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define INTERP_INDEX 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                    \

+    {                                   \

+    GLint xx;                               \

+    PIXEL_TYPE *pixel = pRow;                       \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {               \

+    *pixel = FixedToInt(ffi);           \

+    ffi += fdidx;           \

+    }                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+/*

+* XImage, flat, NON-depth-buffered, 8-bit PF_LOOKUP triangle.

+*/

+static void flat_ci_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                             GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define SETUP_CODE			\

+   GLuint index = VB->IndexPtr->data[pv];	\

+   (*ctx->Driver.Index)( ctx, index );

+#define INNER_LOOP( LEFT, RIGHT, Y )		\

+   {						\

+      GLint xx;					\

+      PIXEL_TYPE *pixel = pRow;			\

+      for (xx=LEFT;xx<RIGHT;xx++,pixel++) {	\

+         *pixel = index;			\

+      }						\

+   }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+/*

+* XImage, smooth, depth-buffered, 8-bit, PF_DITHER8 triangle.

+*/

+static void smooth_DITHER8_z_triangle( GLcontext *ctx,

+                                      GLuint v0, GLuint v1, GLuint v2,

+                                      GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+    DITHER_RGB_TO_8BIT_SETUP

+#define INTERP_Z 1

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                                    \

+    {                                                                       \

+    GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT;                 \

+    for (i=0;i<len;i++,xx++) {                                          \

+    GLdepth z = FixedToDepth(ffz);                                  \

+    if (z < zRow[i]) {                                              \

+    DITHER_RGB_TO_8BIT( FixedToInt(ffr), FixedToInt(ffg),           \

+    FixedToInt(ffb), xx, yy);               \

+    pRow[i] = pixelDithered;                                        \

+    zRow[i] = z;                                                    \

+    }                                                                   \

+    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;                     \

+    ffz += fdzdx;                                                       \

+    }                                                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+/*

+* XImage, flat, depth-buffered, 8-bit PF_DITHER triangle.

+*/

+static void flat_DITHER8_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                    GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+    DITHER_RGB_TO_8BIT_SETUP

+#define INTERP_Z 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+

+#define INNER_LOOP( LEFT, RIGHT, Y )                                    \

+    {                                                                       \

+    GLint i, xx = LEFT, yy = FLIP(Y), len = RIGHT-LEFT;                 \

+    for (i=0;i<len;i++,xx++) {                                          \

+    GLdepth z = FixedToDepth(ffz);                                  \

+    if (z < zRow[i]) {                                              \

+    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],                           \

+             VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);               \

+             pRow[i] = pixelDithered;                                       \

+             zRow[i] = z;                                                   \

+    }                                                                   \

+    ffz += fdzdx;                                                       \

+    }                                                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+/*

+* XImage, smooth, NON-depth-buffered, 8-bit PF_DITHER triangle.

+*/

+static void smooth_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                    GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+    DITHER_RGB_TO_8BIT_SETUP

+#define INTERP_RGB 1

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+#define INNER_LOOP( LEFT, RIGHT, Y )                                    \

+    {                                                                       \

+    GLint xx, yy = FLIP(Y);                                             \

+    PIXEL_TYPE *pixel = pRow;                                           \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {                               \

+    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],   VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);\

+    *pixel = pixelDithered;                                         \

+    ffr += fdrdx;  ffg += fdgdx;  ffb += fdbdx;                     \

+    }                                                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+/*

+* XImage, flat, NON-depth-buffered, 8-bit PF_DITHER triangle.

+*/

+

+static void flat_DITHER8_triangle( GLcontext *ctx, GLuint v0, GLuint v1,

+                                  GLuint v2, GLuint pv )

+{

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+    DITHER_RGB_TO_8BIT_SETUP

+#define PIXEL_ADDRESS(X,Y) PIXELADDR1(X,Y)

+#define PIXEL_TYPE GLubyte

+#define BYTES_PER_ROW (wmesa->ScanWidth)

+

+#define INNER_LOOP( LEFT, RIGHT, Y )                                    \

+    {                                                                       \

+    GLint xx, yy = FLIP(Y);                                             \

+    PIXEL_TYPE *pixel = pRow;                                           \

+    for (xx=LEFT;xx<RIGHT;xx++,pixel++) {                               \

+    DITHER_RGB_TO_8BIT( VB->ColorPtr->data[pv][0],                               \

+             VB->ColorPtr->data[pv][1], VB->ColorPtr->data[pv][2], xx, yy);               \

+             *pixel = pixelDithered;                                            \

+    }                                                                   \

+    }

+#ifdef __MINGW32__

+	#include "tritemp.h"

+#else

+

+	#ifdef WIN32

+//		#include "..\tritemp.h"

+	#else

+		#include "tritemp.h"

+	#endif

+#endif

+}

+

+

+

+

+static /*triangle_func*/ choose_triangle_function( GLcontext *ctx )

+{

+#if 0

+    WMesaContext wmesa = (WMesaContext) ctx->DriverCtx;

+    int depth = wmesa->cColorBits;

+

+    if (ctx->Polygon.SmoothFlag)     return NULL;

+    if (ctx->Texture._ReallyEnabled)  return NULL;

+    if (!wmesa->db_flag) return NULL;

+    /*if (wmesa->xm_buffer->buffer==XIMAGE)*/ {

+    if (   ctx->Light.ShadeModel==GL_SMOOTH

+        && ctx->_RasterMask==DEPTH_BIT

+        && ctx->Depth.Func==GL_LESS

+        && ctx->Depth.Mask==GL_TRUE

+        && ctx->Polygon.StippleFlag==GL_FALSE) {

+        switch (wmesa->pixelformat) {

+        case PF_8A8B8G8R:

+            return smooth_8A8B8G8R_z_triangle;

+        case PF_8R8G8B:

+            return smooth_8R8G8B_z_triangle;

+        case PF_5R6G5B:

+            return smooth_5R6G5B_z_triangle;

+        case PF_DITHER8:

+            return  smooth_DITHER8_z_triangle;

+        case PF_INDEX8:

+            return smooth_ci_z_triangle;

+        default:

+            return NULL;

+        }

+    }

+    if (   ctx->Light.ShadeModel==GL_FLAT

+        && ctx->_RasterMask==DEPTH_BIT

+        && ctx->Depth.Func==GL_LESS

+        && ctx->Depth.Mask==GL_TRUE

+        && ctx->Polygon.StippleFlag==GL_FALSE) {

+        switch (wmesa->pixelformat) {

+        case PF_8A8B8G8R:

+            return flat_8A8B8G8R_z_triangle;

+        case PF_8R8G8B:

+            return flat_8R8G8B_z_triangle;

+        case PF_5R6G5B:

+            return flat_5R6G5B_z_triangle;

+        case PF_DITHER8:

+            return flat_DITHER8_z_triangle;

+        case PF_INDEX8:

+            return flat_ci_z_triangle;

+        default:

+            return NULL;

+        }

+    }

+    if (   ctx->_RasterMask==0   /* no depth test */

+        && ctx->Light.ShadeModel==GL_SMOOTH

+        && ctx->Polygon.StippleFlag==GL_FALSE) {

+        switch (wmesa->pixelformat) {

+        case PF_8A8B8G8R:

+            return smooth_8A8B8G8R_triangle;

+        case PF_8R8G8B:

+            return smooth_8R8G8B_triangle;

+        case PF_5R6G5B:

+            return smooth_5R6G5B_triangle;

+        case PF_DITHER8:

+            return smooth_DITHER8_triangle;

+        case PF_INDEX8:

+            return smooth_ci_triangle;

+        default:

+            return NULL;

+        }

+    }

+

+    if (   ctx->_RasterMask==0   /* no depth test */

+        && ctx->Light.ShadeModel==GL_FLAT

+        && ctx->Polygon.StippleFlag==GL_FALSE) {

+        switch (wmesa->pixelformat) {

+        case PF_8A8B8G8R:

+            return flat_8A8B8G8R_triangle;

+        case PF_8R8G8B:

+            return flat_8R8G8B_triangle;

+        case PF_5R6G5B:

+            return flat_5R6G5B_triangle;

+        case PF_DITHER8:

+            return flat_DITHER8_triangle;

+        case PF_INDEX8:

+            return flat_ci_triangle;

+        default:

+            return NULL;

+        }

+    }

+

+    return NULL;

+    }

+#endif

+}

+

+/*

+* Define a new viewport and reallocate auxillary buffers if the size of

+* the window (color buffer) has changed.

+*/

+void WMesaViewport( GLcontext *ctx,

+                   GLint x, GLint y, GLsizei width, GLsizei height )

+{

+#if 0

+    /* Save viewport */

+    ctx->Viewport.X = x;

+    ctx->Viewport.Width = width;

+    ctx->Viewport.Y = y;

+    ctx->Viewport.Height = height;

+

+    /* compute scale and bias values */

+/* Pre-Keith 3.1 changes

+    ctx->Viewport.Map.m[Sx] = (GLfloat) width / 2.0F;

+    ctx->Viewport.Map.m[Tx] = ctx->Viewport.Sx + x;

+    ctx->Viewport.Map.m[Sy] = (GLfloat) height / 2.0F;

+    ctx->Viewport.Map.m[Ty] = ctx->Viewport.Sy + y;

+*/

+	ctx->Viewport.WindowMap.m[MAT_SX] = (GLfloat) width / 2.0F;

+	ctx->Viewport.WindowMap.m[MAT_TX] = ctx->Viewport.WindowMap.m[MAT_SX] + x;

+	ctx->Viewport.WindowMap.m[MAT_SY] = (GLfloat) height / 2.0F;

+	ctx->Viewport.WindowMap.m[MAT_TY] = ctx->Viewport.WindowMap.m[MAT_SY] + y;

+#endif

+}