/* * Mesa 3-D graphics library * Version: 6.5.2 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * \file xm_api.c * * All the XMesa* API functions. * * * NOTES: * * The window coordinate system origin (0,0) is in the lower-left corner * of the window. X11's window coordinate origin is in the upper-left * corner of the window. Therefore, most drawing functions in this * file have to flip Y coordinates. * * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile * in support for the MIT Shared Memory extension. If enabled, when you * use an Ximage for the back buffer in double buffered mode, the "swap" * operation will be faster. You must also link with -lXext. * * Byte swapping: If the Mesa host and the X display use a different * byte order then there's some trickiness to be aware of when using * XImages. The byte ordering used for the XImage is that of the X * display, not the Mesa host. * The color-to-pixel encoding for True/DirectColor must be done * according to the display's visual red_mask, green_mask, and blue_mask. * If XPutPixel is used to put a pixel into an XImage then XPutPixel will * do byte swapping if needed. If one wants to directly "poke" the pixel * into the XImage's buffer then the pixel must be byte swapped first. In * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format * and use XPutPixel everywhere except in the implementation of * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so * instead of using XPutPixel we "poke" our values after byte-swapping * the clear pixel value if needed. * */ #ifdef __CYGWIN__ #undef WIN32 #undef __WIN32__ #endif #include "glxheader.h" #include "GL/xmesa.h" #include "xmesaP.h" #include "context.h" #include "extensions.h" #include "framebuffer.h" #include "glthread.h" #include "imports.h" #include "macros.h" #include "renderbuffer.h" #include "swrast/swrast.h" #include "swrast_setup/swrast_setup.h" #include "vbo/vbo.h" #include "tnl/tnl.h" #include "tnl/t_context.h" #include "tnl/t_pipeline.h" #include "drivers/common/driverfuncs.h" /** * Global X driver lock */ _glthread_Mutex _xmesa_lock; /** * Lookup tables for HPCR pixel format: */ static short hpcr_rgbTbl[3][256] = { { 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 }, { 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 }, { 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 } }; /**********************************************************************/ /***** X Utility Functions *****/ /**********************************************************************/ /** * Return the host's byte order as LSBFirst or MSBFirst ala X. */ #ifndef XFree86Server static int host_byte_order( void ) { int i = 1; char *cptr = (char *) &i; return (*cptr==1) ? LSBFirst : MSBFirst; } #endif /** * Check if the X Shared Memory extension is available. * Return: 0 = not available * 1 = shared XImage support available * 2 = shared Pixmap support available also */ static int check_for_xshm( XMesaDisplay *display ) { #if defined(USE_XSHM) && !defined(XFree86Server) int major, minor, ignore; Bool pixmaps; if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { return (pixmaps==True) ? 2 : 1; } else { return 0; } } else { return 0; } #else /* No XSHM support */ return 0; #endif } /** * Apply gamma correction to an intensity value in [0..max]. Return the * new intensity value. */ static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) { if (gamma == 1.0) { return value; } else { double x = (double) value / (double) max; return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); } } /** * Return the true number of bits per pixel for XImages. * For example, if we request a 24-bit deep visual we may actually need/get * 32bpp XImages. This function returns the appropriate bpp. * Input: dpy - the X display * visinfo - desribes the visual to be used for XImages * Return: true number of bits per pixel for XImages */ static int bits_per_pixel( XMesaVisual xmv ) { #ifdef XFree86Server const int depth = xmv->nplanes; int i; assert(depth > 0); for (i = 0; i < screenInfo.numPixmapFormats; i++) { if (screenInfo.formats[i].depth == depth) return screenInfo.formats[i].bitsPerPixel; } return depth; /* should never get here, but this should be safe */ #else XMesaDisplay *dpy = xmv->display; XMesaVisualInfo visinfo = xmv->visinfo; XMesaImage *img; int bitsPerPixel; /* Create a temporary XImage */ img = XCreateImage( dpy, visinfo->visual, visinfo->depth, ZPixmap, 0, /*format, offset*/ (char*) MALLOC(8), /*data*/ 1, 1, /*width, height*/ 32, /*bitmap_pad*/ 0 /*bytes_per_line*/ ); assert(img); /* grab the bits/pixel value */ bitsPerPixel = img->bits_per_pixel; /* free the XImage */ _mesa_free( img->data ); img->data = NULL; XMesaDestroyImage( img ); return bitsPerPixel; #endif } /* * Determine if a given X window ID is valid (window exists). * Do this by calling XGetWindowAttributes() for the window and * checking if we catch an X error. * Input: dpy - the display * win - the window to check for existance * Return: GL_TRUE - window exists * GL_FALSE - window doesn't exist */ #ifndef XFree86Server static GLboolean WindowExistsFlag; static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) { (void) dpy; if (xerr->error_code == BadWindow) { WindowExistsFlag = GL_FALSE; } return 0; } static GLboolean window_exists( XMesaDisplay *dpy, Window win ) { XWindowAttributes wa; int (*old_handler)( XMesaDisplay*, XErrorEvent* ); WindowExistsFlag = GL_TRUE; old_handler = XSetErrorHandler(window_exists_err_handler); XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ XSetErrorHandler(old_handler); return WindowExistsFlag; } #endif /** * Return the size of the window (or pixmap) that corresponds to the * given XMesaBuffer. * \param width returns width in pixels * \param height returns height in pixels */ void xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, GLuint *width, GLuint *height) { #ifdef XFree86Server *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); #else Window root; Status stat; int xpos, ypos; unsigned int w, h, bw, depth; _glthread_LOCK_MUTEX(_xmesa_lock); XSync(b->xm_visual->display, 0); /* added for Chromium */ stat = XGetGeometry(dpy, b->frontxrb->pixmap, &root, &xpos, &ypos, &w, &h, &bw, &depth); _glthread_UNLOCK_MUTEX(_xmesa_lock); if (stat) { *width = w; *height = h; } else { /* probably querying a window that's recently been destroyed */ _mesa_warning(NULL, "XGetGeometry failed!\n"); *width = *height = 1; } #endif } /**********************************************************************/ /***** Linked list of XMesaBuffers *****/ /**********************************************************************/ XMesaBuffer XMesaBufferList = NULL; /** * Allocate a new XMesaBuffer object which corresponds to the given drawable. * Note that XMesaBuffer is derived from GLframebuffer. * The new XMesaBuffer will not have any size (Width=Height=0). * * \param d the corresponding X drawable (window or pixmap) * \param type either WINDOW, PIXMAP or PBUFFER, describing d * \param vis the buffer's visual * \param cmap the window's colormap, if known. * \return new XMesaBuffer or NULL if any problem */ static XMesaBuffer create_xmesa_buffer(XMesaDrawable d, BufferType type, XMesaVisual vis, XMesaColormap cmap) { XMesaBuffer b; ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); if (!b) return NULL; b->display = vis->display; b->xm_visual = vis; b->type = type; b->cmap = cmap; _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); b->mesa_buffer.Delete = xmesa_delete_framebuffer; /* * Front renderbuffer */ b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); if (!b->frontxrb) { _mesa_free(b); return NULL; } b->frontxrb->Parent = b; b->frontxrb->drawable = d; b->frontxrb->pixmap = (XMesaPixmap) d; _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, &b->frontxrb->Base); /* * Back renderbuffer */ if (vis->mesa_visual.doubleBufferMode) { b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); if (!b->backxrb) { /* XXX free front xrb too */ _mesa_free(b); return NULL; } b->backxrb->Parent = b; /* determine back buffer implementation */ b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, &b->backxrb->Base); } /* * Software alpha planes */ if (vis->mesa_visual.alphaBits > 0 && vis->undithered_pf != PF_8A8B8G8R && vis->undithered_pf != PF_8A8R8G8B) { /* Visual has alpha, but pixel format doesn't support it. * We'll use an alpha renderbuffer wrapper. */ b->swAlpha = GL_TRUE; } else { b->swAlpha = GL_FALSE; } /* * Other renderbuffer (depth, stencil, etc) */ _mesa_add_soft_renderbuffers(&b->mesa_buffer, GL_FALSE, /* color */ vis->mesa_visual.haveDepthBuffer, vis->mesa_visual.haveStencilBuffer, vis->mesa_visual.haveAccumBuffer, b->swAlpha, vis->mesa_visual.numAuxBuffers > 0 ); /* insert buffer into linked list */ b->Next = XMesaBufferList; XMesaBufferList = b; return b; } /** * Find an XMesaBuffer by matching X display and colormap but NOT matching * the notThis buffer. */ XMesaBuffer xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) { XMesaBuffer b; for (b=XMesaBufferList; b; b=b->Next) { if (b->display==dpy && b->cmap==cmap && b!=notThis) { return b; } } return NULL; } /** * Remove buffer from linked list, delete if no longer referenced. */ static void xmesa_free_buffer(XMesaBuffer buffer) { XMesaBuffer prev = NULL, b; for (b = XMesaBufferList; b; b = b->Next) { if (b == buffer) { struct gl_framebuffer *fb = &buffer->mesa_buffer; /* unlink buffer from list */ if (prev) prev->Next = buffer->Next; else XMesaBufferList = buffer->Next; /* mark as delete pending */ fb->DeletePending = GL_TRUE; /* Since the X window for the XMesaBuffer is going away, we don't * want to dereference this pointer in the future. */ b->frontxrb->drawable = 0; /* Unreference. If count = zero we'll really delete the buffer */ _mesa_unreference_framebuffer(&fb); return; } /* continue search */ prev = b; } /* buffer not found in XMesaBufferList */ _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); } /** * Copy X color table stuff from one XMesaBuffer to another. */ static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) { MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); dst->num_alloced = src->num_alloced; MEMCPY(dst->alloced_colors, src->alloced_colors, sizeof(src->alloced_colors)); } /**********************************************************************/ /***** Misc Private Functions *****/ /**********************************************************************/ /** * A replacement for XAllocColor. This function should never * fail to allocate a color. When XAllocColor fails, we return * the nearest matching color. If we have to allocate many colors * this function isn't too efficient; the XQueryColors() could be * done just once. * Written by Michael Pichler, Brian Paul, Mark Kilgard * Input: dpy - X display * cmap - X colormap * cmapSize - size of colormap * In/Out: color - the XColor struct * Output: exact - 1=exact color match, 0=closest match * alloced - 1=XAlloc worked, 0=XAlloc failed */ static void noFaultXAllocColor( int client, XMesaDisplay *dpy, XMesaColormap cmap, int cmapSize, XMesaColor *color, int *exact, int *alloced ) { #ifdef XFree86Server Pixel *ppixIn; xrgb *ctable; #else /* we'll try to cache ctable for better remote display performance */ static Display *prevDisplay = NULL; static XMesaColormap prevCmap = 0; static int prevCmapSize = 0; static XMesaColor *ctable = NULL; #endif XMesaColor subColor; int i, bestmatch; double mindist; /* 3*2^16^2 exceeds long int precision. */ (void) client; /* First try just using XAllocColor. */ #ifdef XFree86Server if (AllocColor(cmap, &color->red, &color->green, &color->blue, &color->pixel, client) == Success) #else if (XAllocColor(dpy, cmap, color)) #endif { *exact = 1; *alloced = 1; return; } /* Alloc failed, search for closest match */ /* Retrieve color table entries. */ /* XXX alloca candidate. */ #ifdef XFree86Server ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); for (i = 0; i < cmapSize; i++) { ppixIn[i] = i; } QueryColors(cmap, cmapSize, ppixIn, ctable); #else if (prevDisplay != dpy || prevCmap != cmap || prevCmapSize != cmapSize || !ctable) { /* free previously cached color table */ if (ctable) _mesa_free(ctable); /* Get the color table from X */ ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); assert(ctable); for (i = 0; i < cmapSize; i++) { ctable[i].pixel = i; } XQueryColors(dpy, cmap, ctable, cmapSize); prevDisplay = dpy; prevCmap = cmap; prevCmapSize = cmapSize; } #endif /* Find best match. */ bestmatch = -1; mindist = 0.0; for (i = 0; i < cmapSize; i++) { double dr = 0.30 * ((double) color->red - (double) ctable[i].red); double dg = 0.59 * ((double) color->green - (double) ctable[i].green); double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); double dist = dr * dr + dg * dg + db * db; if (bestmatch < 0 || dist < mindist) { bestmatch = i; mindist = dist; } } /* Return result. */ subColor.red = ctable[bestmatch].red; subColor.green = ctable[bestmatch].green; subColor.blue = ctable[bestmatch].blue; /* Try to allocate the closest match color. This should only * fail if the cell is read/write. Otherwise, we're incrementing * the cell's reference count. */ #ifdef XFree86Server if (AllocColor(cmap, &subColor.red, &subColor.green, &subColor.blue, &subColor.pixel, client) == Success) { #else if (XAllocColor(dpy, cmap, &subColor)) { #endif *alloced = 1; } else { /* do this to work around a problem reported by Frank Ortega */ subColor.pixel = (unsigned long) bestmatch; subColor.red = ctable[bestmatch].red; subColor.green = ctable[bestmatch].green; subColor.blue = ctable[bestmatch].blue; subColor.flags = DoRed | DoGreen | DoBlue; *alloced = 0; } #ifdef XFree86Server _mesa_free(ppixIn); _mesa_free(ctable); #else /* don't free table, save it for next time */ #endif *color = subColor; *exact = 0; } /** * Do setup for PF_GRAYSCALE pixel format. * Note that buffer may be NULL. */ static GLboolean setup_grayscale(int client, XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { return GL_FALSE; } if (buffer) { XMesaBuffer prevBuffer; if (!cmap) { return GL_FALSE; } prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); if (prevBuffer && (buffer->xm_visual->mesa_visual.rgbMode == prevBuffer->xm_visual->mesa_visual.rgbMode)) { /* Copy colormap stuff from previous XMesaBuffer which uses same * X colormap. Do this to avoid time spent in noFaultXAllocColor. */ copy_colortable_info(buffer, prevBuffer); } else { /* Allocate 256 shades of gray */ int gray; int colorsfailed = 0; for (gray=0;gray<256;gray++) { GLint r = gamma_adjust( v->RedGamma, gray, 255 ); GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); int exact, alloced; XMesaColor xcol; xcol.red = (r << 8) | r; xcol.green = (g << 8) | g; xcol.blue = (b << 8) | b; noFaultXAllocColor( client, v->display, cmap, GET_COLORMAP_SIZE(v), &xcol, &exact, &alloced ); if (!exact) { colorsfailed++; } if (alloced) { assert(buffer->num_alloced<256); buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; buffer->num_alloced++; } /*OLD assert(gray < 576); buffer->color_table[gray*3+0] = xcol.pixel; buffer->color_table[gray*3+1] = xcol.pixel; buffer->color_table[gray*3+2] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; */ buffer->color_table[gray] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = gray; buffer->pixel_to_g[xcol.pixel] = gray; buffer->pixel_to_b[xcol.pixel] = gray; } if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { _mesa_warning(NULL, "Note: %d out of 256 needed colors do not match exactly.\n", colorsfailed ); } } } v->dithered_pf = PF_Grayscale; v->undithered_pf = PF_Grayscale; return GL_TRUE; } /** * Setup RGB rendering for a window with a PseudoColor, StaticColor, * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB * color. While this function was originally designed just for 8-bit * visuals, it has also proven to work from 4-bit up to 16-bit visuals. * Dithering code contributed by Bob Mercier. */ static GLboolean setup_dithered_color(int client, XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { return GL_FALSE; } if (buffer) { XMesaBuffer prevBuffer; if (!cmap) { return GL_FALSE; } prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); if (prevBuffer && (buffer->xm_visual->mesa_visual.rgbMode == prevBuffer->xm_visual->mesa_visual.rgbMode)) { /* Copy colormap stuff from previous, matching XMesaBuffer. * Do this to avoid time spent in noFaultXAllocColor. */ copy_colortable_info(buffer, prevBuffer); } else { /* Allocate X colors and initialize color_table[], red_table[], etc */ int r, g, b, i; int colorsfailed = 0; for (r = 0; r < DITH_R; r++) { for (g = 0; g < DITH_G; g++) { for (b = 0; b < DITH_B; b++) { XMesaColor xcol; int exact, alloced; xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); noFaultXAllocColor( client, v->display, cmap, GET_COLORMAP_SIZE(v), &xcol, &exact, &alloced ); if (!exact) { colorsfailed++; } if (alloced) { assert(buffer->num_alloced<256); buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; buffer->num_alloced++; } i = DITH_MIX( r, g, b ); assert(i < 576); buffer->color_table[i] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); } } } if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { _mesa_warning(NULL, "Note: %d out of %d needed colors do not match exactly.\n", colorsfailed, DITH_R * DITH_G * DITH_B ); } } } v->dithered_pf = PF_Dither; v->undithered_pf = PF_Lookup; return GL_TRUE; } /** * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. * Special dithering tables have to be initialized. */ static void setup_8bit_hpcr(XMesaVisual v) { /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined * on the root window AND the colormap obtainable by XGetRGBColormaps * for that atom must be set on the window. (see also tkInitWindow) * If that colormap is not set, the output will look stripy. */ /* Setup color tables with gamma correction */ int i; double g; g = 1.0 / v->RedGamma; for (i=0; i<256; i++) { GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); } g = 1.0 / v->GreenGamma; for (i=0; i<256; i++) { GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); } g = 1.0 / v->BlueGamma; for (i=0; i<256; i++) { GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); } v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ v->dithered_pf = PF_HPCR; /* which method should I use to clear */ /* GL_FALSE: keep the ordinary method */ /* GL_TRUE : clear with dither pattern */ v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; if (v->hpcr_clear_flag) { v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, DefaultRootWindow(v->display), 16, 2, 8); #ifndef XFree86Server v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 0, 0, 16, 2, AllPlanes, ZPixmap); #endif } } /** * Setup RGB rendering for a window with a True/DirectColor visual. */ static void setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { unsigned long rmask, gmask, bmask; (void) buffer; (void) cmap; /* Compute red multiplier (mask) and bit shift */ v->rshift = 0; rmask = GET_REDMASK(v); while ((rmask & 1)==0) { v->rshift++; rmask = rmask >> 1; } /* Compute green multiplier (mask) and bit shift */ v->gshift = 0; gmask = GET_GREENMASK(v); while ((gmask & 1)==0) { v->gshift++; gmask = gmask >> 1; } /* Compute blue multiplier (mask) and bit shift */ v->bshift = 0; bmask = GET_BLUEMASK(v); while ((bmask & 1)==0) { v->bshift++; bmask = bmask >> 1; } /* * Compute component-to-pixel lookup tables and dithering kernel */ { static GLubyte kernel[16] = { 0*16, 8*16, 2*16, 10*16, 12*16, 4*16, 14*16, 6*16, 3*16, 11*16, 1*16, 9*16, 15*16, 7*16, 13*16, 5*16, }; GLint rBits = _mesa_bitcount(rmask); GLint gBits = _mesa_bitcount(gmask); GLint bBits = _mesa_bitcount(bmask); GLint maxBits; GLuint i; /* convert pixel components in [0,_mask] to RGB values in [0,255] */ for (i=0; i<=rmask; i++) v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); for (i=0; i<=gmask; i++) v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); for (i=0; i<=bmask; i++) v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); /* convert RGB values from [0,255] to pixel components */ for (i=0;i<256;i++) { GLint r = gamma_adjust(v->RedGamma, i, 255); GLint g = gamma_adjust(v->GreenGamma, i, 255); GLint b = gamma_adjust(v->BlueGamma, i, 255); v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; } /* overflow protection */ for (i=256;i<512;i++) { v->RtoPixel[i] = v->RtoPixel[255]; v->GtoPixel[i] = v->GtoPixel[255]; v->BtoPixel[i] = v->BtoPixel[255]; } /* setup dithering kernel */ maxBits = rBits; if (gBits > maxBits) maxBits = gBits; if (bBits > maxBits) maxBits = bBits; for (i=0;i<16;i++) { v->Kernel[i] = kernel[i] >> maxBits; } v->undithered_pf = PF_Truecolor; v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; } /* * Now check for TrueColor visuals which we can optimize. */ if ( GET_REDMASK(v) ==0x0000ff && GET_GREENMASK(v)==0x00ff00 && GET_BLUEMASK(v) ==0xff0000 && CHECK_BYTE_ORDER(v) && v->BitsPerPixel==32 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { /* common 32 bpp config used on SGI, Sun */ v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ } else if (GET_REDMASK(v) == 0xff0000 && GET_GREENMASK(v)== 0x00ff00 && GET_BLUEMASK(v) == 0x0000ff && CHECK_BYTE_ORDER(v) && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ if (v->BitsPerPixel==32) { /* if 32 bpp, and visual indicates 8 bpp alpha channel */ if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ else v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ } else if (v->BitsPerPixel == 24) { v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ } } else if (GET_REDMASK(v) ==0xf800 && GET_GREENMASK(v)==0x07e0 && GET_BLUEMASK(v) ==0x001f && CHECK_BYTE_ORDER(v) && v->BitsPerPixel==16 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { /* 5-6-5 RGB */ v->undithered_pf = PF_5R6G5B; v->dithered_pf = PF_Dither_5R6G5B; } else if (GET_REDMASK(v) ==0xe0 && GET_GREENMASK(v)==0x1c && GET_BLUEMASK(v) ==0x03 && CHECK_FOR_HPCR(v)) { /* 8-bit HP color recovery */ setup_8bit_hpcr( v ); } } /** * Setup RGB rendering for a window with a monochrome visual. */ static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) { (void) b; v->dithered_pf = v->undithered_pf = PF_1Bit; /* if black=1 then we must flip pixel values */ v->bitFlip = (GET_BLACK_PIXEL(v) != 0); } /** * When a context is bound for the first time, we can finally finish * initializing the context's visual and buffer information. * \param v the XMesaVisual to initialize * \param b the XMesaBuffer to initialize (may be NULL) * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode * \param window the window/pixmap we're rendering into * \param cmap the colormap associated with the window/pixmap * \return GL_TRUE=success, GL_FALSE=failure */ static GLboolean initialize_visual_and_buffer(int client, XMesaVisual v, XMesaBuffer b, GLboolean rgb_flag, XMesaDrawable window, XMesaColormap cmap) { ASSERT(!b || b->xm_visual == v); /* Save true bits/pixel */ v->BitsPerPixel = bits_per_pixel(v); assert(v->BitsPerPixel > 0); if (rgb_flag == GL_FALSE) { /* COLOR-INDEXED WINDOW: * Even if the visual is TrueColor or DirectColor we treat it as * being color indexed. This is weird but might be useful to someone. */ v->dithered_pf = v->undithered_pf = PF_Index; v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); } else { /* RGB WINDOW: * We support RGB rendering into almost any kind of visual. */ const int xclass = v->mesa_visual.visualType; if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { setup_truecolor( v, b, cmap ); } else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { setup_monochrome( v, b ); } else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { if (!setup_grayscale( client, v, b, cmap )) { return GL_FALSE; } } else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { if (!setup_dithered_color( client, v, b, cmap )) { return GL_FALSE; } } else { _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); return GL_FALSE; } v->mesa_visual.indexBits = 0; if (_mesa_getenv("MESA_NO_DITHER")) { v->dithered_pf = v->undithered_pf; } } /* * If MESA_INFO env var is set print out some debugging info * which can help Brian figure out what's going on when a user * reports bugs. */ if (_mesa_getenv("MESA_INFO")) { _mesa_printf("X/Mesa visual = %p\n", (void *) v); _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); } if (b && window) { /* Do window-specific initializations */ /* these should have been set in create_xmesa_buffer */ ASSERT(b->frontxrb->drawable == window); ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); /* Setup for single/double buffering */ if (v->mesa_visual.doubleBufferMode) { /* Double buffered */ b->shm = check_for_xshm( v->display ); } /* X11 graphics contexts */ #ifdef XFree86Server b->gc = CreateScratchGC(v->display, window->depth); #else b->gc = XCreateGC( v->display, window, 0, NULL ); #endif XMesaSetFunction( v->display, b->gc, GXcopy ); /* cleargc - for glClear() */ #ifdef XFree86Server b->cleargc = CreateScratchGC(v->display, window->depth); #else b->cleargc = XCreateGC( v->display, window, 0, NULL ); #endif XMesaSetFunction( v->display, b->cleargc, GXcopy ); /* * Don't generate Graphics Expose/NoExpose events in swapbuffers(). * Patch contributed by Michael Pichler May 15, 1995. */ #ifdef XFree86Server b->swapgc = CreateScratchGC(v->display, window->depth); { CARD32 v[1]; v[0] = FALSE; dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); } #else { XGCValues gcvalues; gcvalues.graphics_exposures = False; b->swapgc = XCreateGC(v->display, window, GCGraphicsExposures, &gcvalues); } #endif XMesaSetFunction( v->display, b->swapgc, GXcopy ); /* * Set fill style and tile pixmap once for all for HPCR stuff * (instead of doing it each time in clear_color_HPCR_pixmap()) * Initialize whole stuff * Patch contributed by Jacques Leroy March 8, 1998. */ if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { int i; for (i = 0; i < 16; i++) { XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); } XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); XMesaSetFillStyle( v->display, b->cleargc, FillTiled); XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); } /* Initialize the row buffer XImage for use in write_color_span() */ #ifdef XFree86Server b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, (char *)MALLOC(MAX_WIDTH*4)); #else b->rowimage = XCreateImage( v->display, v->visinfo->visual, v->visinfo->depth, ZPixmap, 0, /*format, offset*/ (char*) MALLOC(MAX_WIDTH*4), /*data*/ MAX_WIDTH, 1, /*width, height*/ 32, /*bitmap_pad*/ 0 /*bytes_per_line*/ ); #endif if (!b->rowimage) return GL_FALSE; } return GL_TRUE; } /* * Convert an RGBA color to a pixel value. */ unsigned long xmesa_color_to_pixel(GLcontext *ctx, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLuint pixelFormat) { XMesaContext xmesa = XMESA_CONTEXT(ctx); switch (pixelFormat) { case PF_Index: return 0; case PF_Truecolor: { unsigned long p; PACK_TRUECOLOR( p, r, g, b ); return p; } case PF_8A8B8G8R: return PACK_8A8B8G8R( r, g, b, a ); case PF_8A8R8G8B: return PACK_8A8R8G8B( r, g, b, a ); case PF_8R8G8B: /* fall through */ case PF_8R8G8B24: return PACK_8R8G8B( r, g, b ); case PF_5R6G5B: return PACK_5R6G5B( r, g, b ); case PF_Dither: { DITHER_SETUP; return DITHER( 1, 0, r, g, b ); } case PF_1Bit: /* 382 = (3*255)/2 */ return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; case PF_HPCR: return DITHER_HPCR(1, 1, r, g, b); case PF_Lookup: { LOOKUP_SETUP; return LOOKUP( r, g, b ); } case PF_Grayscale: return GRAY_RGB( r, g, b ); case PF_Dither_True: /* fall through */ case PF_Dither_5R6G5B: { unsigned long p; PACK_TRUEDITHER(p, 1, 0, r, g, b); return p; } default: _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); } return 0; } #define NUM_VISUAL_TYPES 6 /** * Convert an X visual type to a GLX visual type. * * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) * to be converted. * \return If \c visualType is a valid X visual type, a GLX visual type will * be returned. Otherwise \c GLX_NONE will be returned. * * \note * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the * DRI CVS tree. */ static GLint xmesa_convert_from_x_visual_type( int visualType ) { static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { GLX_STATIC_GRAY, GLX_GRAY_SCALE, GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, GLX_TRUE_COLOR, GLX_DIRECT_COLOR }; return ( (unsigned) visualType < NUM_VISUAL_TYPES ) ? glx_visual_types[ visualType ] : GLX_NONE; } /**********************************************************************/ /***** Public Functions *****/ /**********************************************************************/ /* * Create a new X/Mesa visual. * Input: display - X11 display * visinfo - an XVisualInfo pointer * rgb_flag - GL_TRUE = RGB mode, * GL_FALSE = color index mode * alpha_flag - alpha buffer requested? * db_flag - GL_TRUE = double-buffered, * GL_FALSE = single buffered * stereo_flag - stereo visual? * ximage_flag - GL_TRUE = use an XImage for back buffer, * GL_FALSE = use an off-screen pixmap for back buffer * depth_size - requested bits/depth values, or zero * stencil_size - requested bits/stencil values, or zero * accum_red_size - requested bits/red accum values, or zero * accum_green_size - requested bits/green accum values, or zero * accum_blue_size - requested bits/blue accum values, or zero * accum_alpha_size - requested bits/alpha accum values, or zero * num_samples - number of samples/pixel if multisampling, or zero * level - visual level, usually 0 * visualCaveat - ala the GLX extension, usually GLX_NONE * Return; a new XMesaVisual or 0 if error. */ PUBLIC XMesaVisual XMesaCreateVisual( XMesaDisplay *display, XMesaVisualInfo visinfo, GLboolean rgb_flag, GLboolean alpha_flag, GLboolean db_flag, GLboolean stereo_flag, GLboolean ximage_flag, GLint depth_size, GLint stencil_size, GLint accum_red_size, GLint accum_green_size, GLint accum_blue_size, GLint accum_alpha_size, GLint num_samples, GLint level, GLint visualCaveat ) { char *gamma; XMesaVisual v; GLint red_bits, green_bits, blue_bits, alpha_bits; #ifndef XFree86Server /* For debugging only */ if (_mesa_getenv("MESA_XSYNC")) { /* This makes debugging X easier. * In your debugger, set a breakpoint on _XError to stop when an * X protocol error is generated. */ XSynchronize( display, 1 ); } #endif v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); if (!v) { return NULL; } v->display = display; /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() * the struct but we may need some of the information contained in it * at a later time. */ #ifndef XFree86Server v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); if(!v->visinfo) { _mesa_free(v); return NULL; } MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); #endif /* check for MESA_GAMMA environment variable */ gamma = _mesa_getenv("MESA_GAMMA"); if (gamma) { v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); if (v->RedGamma<=0.0) v->RedGamma = 1.0; if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; } else { v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; } v->ximage_flag = ximage_flag; #ifdef XFree86Server /* We could calculate these values by ourselves. nplanes is either the sum * of the red, green, and blue bits or the number index bits. * ColormapEntries is either (1U << index_bits) or * (1U << max(redBits, greenBits, blueBits)). */ assert(visinfo->nplanes > 0); v->nplanes = visinfo->nplanes; v->ColormapEntries = visinfo->ColormapEntries; v->mesa_visual.redMask = visinfo->redMask; v->mesa_visual.greenMask = visinfo->greenMask; v->mesa_visual.blueMask = visinfo->blueMask; v->mesa_visual.visualID = visinfo->vid; v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ #else v->mesa_visual.redMask = visinfo->red_mask; v->mesa_visual.greenMask = visinfo->green_mask; v->mesa_visual.blueMask = visinfo->blue_mask; v->mesa_visual.visualID = visinfo->visualid; v->mesa_visual.screen = visinfo->screen; #endif #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); #else v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); #endif v->mesa_visual.visualRating = visualCaveat; if (alpha_flag) v->mesa_visual.alphaBits = 8; (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); { const int xclass = v->mesa_visual.visualType; if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { red_bits = _mesa_bitcount(GET_REDMASK(v)); green_bits = _mesa_bitcount(GET_GREENMASK(v)); blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); } else { /* this is an approximation */ int depth; depth = GET_VISUAL_DEPTH(v); red_bits = depth / 3; depth -= red_bits; green_bits = depth / 2; depth -= green_bits; blue_bits = depth; alpha_bits = 0; assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); } alpha_bits = v->mesa_visual.alphaBits; } _mesa_initialize_visual( &v->mesa_visual, rgb_flag, db_flag, stereo_flag, red_bits, green_bits, blue_bits, alpha_bits, v->mesa_visual.indexBits, depth_size, stencil_size, accum_red_size, accum_green_size, accum_blue_size, accum_alpha_size, 0 ); /* XXX minor hack */ v->mesa_visual.level = level; return v; } PUBLIC void XMesaDestroyVisual( XMesaVisual v ) { #ifndef XFree86Server _mesa_free(v->visinfo); #endif _mesa_free(v); } /** * Create a new XMesaContext. * \param v the XMesaVisual * \param share_list another XMesaContext with which to share display * lists or NULL if no sharing is wanted. * \return an XMesaContext or NULL if error. */ PUBLIC XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) { static GLboolean firstTime = GL_TRUE; XMesaContext c; GLcontext *mesaCtx; struct dd_function_table functions; TNLcontext *tnl; if (firstTime) { _glthread_INIT_MUTEX(_xmesa_lock); firstTime = GL_FALSE; } /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ c = (XMesaContext) CALLOC_STRUCT(xmesa_context); if (!c) return NULL; mesaCtx = &(c->mesa); /* initialize with default driver functions, then plug in XMesa funcs */ _mesa_init_driver_functions(&functions); xmesa_init_driver_functions(v, &functions); if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, share_list ? &(share_list->mesa) : (GLcontext *) NULL, &functions, (void *) c)) { _mesa_free(c); return NULL; } _mesa_enable_sw_extensions(mesaCtx); _mesa_enable_1_3_extensions(mesaCtx); _mesa_enable_1_4_extensions(mesaCtx); _mesa_enable_1_5_extensions(mesaCtx); _mesa_enable_2_0_extensions(mesaCtx); #if ENABLE_EXT_texure_compression_s3tc if (c->Mesa_DXTn) { _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); } _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); #endif #if ENABLE_EXT_timer_query _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); #endif #ifdef XFree86Server /* If we're running in the X server, do bounds checking to prevent * segfaults and server crashes! */ mesaCtx->Const.CheckArrayBounds = GL_TRUE; #endif /* finish up xmesa context initializations */ c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; c->xm_visual = v; c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ c->display = v->display; c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ /* Initialize the software rasterizer and helper modules. */ if (!_swrast_CreateContext( mesaCtx ) || !_vbo_CreateContext( mesaCtx ) || !_tnl_CreateContext( mesaCtx ) || !_swsetup_CreateContext( mesaCtx )) { _mesa_free_context_data(&c->mesa); _mesa_free(c); return NULL; } /* tnl setup */ tnl = TNL_CONTEXT(mesaCtx); tnl->Driver.RunPipeline = _tnl_run_pipeline; /* swrast setup */ xmesa_register_swrast_functions( mesaCtx ); _swsetup_Wakeup(mesaCtx); return c; } PUBLIC void XMesaDestroyContext( XMesaContext c ) { GLcontext *mesaCtx = &c->mesa; #ifdef FX XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); if (xmbuf && xmbuf->FXctx) fxMesaDestroyContext(xmbuf->FXctx); #endif _swsetup_DestroyContext( mesaCtx ); _swrast_DestroyContext( mesaCtx ); _tnl_DestroyContext( mesaCtx ); _vbo_DestroyContext( mesaCtx ); _mesa_free_context_data( mesaCtx ); _mesa_free( c ); } /** * Private function for creating an XMesaBuffer which corresponds to an * X window or pixmap. * \param v the window's XMesaVisual * \param w the window we're wrapping * \return new XMesaBuffer or NULL if error */ PUBLIC XMesaBuffer XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) { #ifndef XFree86Server XWindowAttributes attr; #endif int client = 0; XMesaBuffer b; XMesaColormap cmap; assert(v); assert(w); /* Check that window depth matches visual depth */ #ifdef XFree86Server client = CLIENT_ID(((XMesaDrawable)w)->id); if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); return NULL; } #else XGetWindowAttributes( v->display, w, &attr ); if (GET_VISUAL_DEPTH(v) != attr.depth) { _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", GET_VISUAL_DEPTH(v), attr.depth); return NULL; } #endif /* Find colormap */ #ifdef XFree86Server cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); #else if (attr.colormap) { cmap = attr.colormap; } else { _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); /* this is weird, a window w/out a colormap!? */ /* OK, let's just allocate a new one and hope for the best */ cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); } #endif b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); if (!b) return NULL; if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, (XMesaDrawable) w, cmap )) { xmesa_free_buffer(b); return NULL; } return b; } #ifdef FX void FXcreateContext(XMesaVisual v, XMesaWindow w, XMesaContext c, XMesaBuffer b) { char *fxEnvVar = _mesa_getenv("MESA_GLX_FX"); if (fxEnvVar) { if (fxEnvVar[0]!='d') { int attribs[100]; int numAttribs = 0; int hw; if (v->mesa_visual.depthBits > 0) { attribs[numAttribs++] = FXMESA_DEPTH_SIZE; attribs[numAttribs++] = v->mesa_visual.depthBits; } if (v->mesa_visual.doubleBufferMode) { attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; } if (v->mesa_visual.accumRedBits > 0) { attribs[numAttribs++] = FXMESA_ACCUM_SIZE; attribs[numAttribs++] = v->mesa_visual.accumRedBits; } if (v->mesa_visual.stencilBits > 0) { attribs[numAttribs++] = FXMESA_STENCIL_SIZE; attribs[numAttribs++] = v->mesa_visual.stencilBits; } if (v->mesa_visual.alphaBits > 0) { attribs[numAttribs++] = FXMESA_ALPHA_SIZE; attribs[numAttribs++] = v->mesa_visual.alphaBits; } if (1) { attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; attribs[numAttribs++] = (int) &(c->mesa); } attribs[numAttribs++] = FXMESA_NONE; /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ hw = fxMesaSelectCurrentBoard(0); /* if these fail, there's a new bug somewhere */ ASSERT(b->mesa_buffer.Width > 0); ASSERT(b->mesa_buffer.Height > 0); if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, b->mesa_buffer.Height, attribs); if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { b->FXwindowHack = GL_TRUE; FX_grSstControl(GR_CONTROL_DEACTIVATE); } else { b->FXwindowHack = GL_FALSE; } } } else { if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, GR_REFRESH_75Hz, attribs); else b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, b->mesa_buffer.Height, attribs); b->FXisHackUsable = GL_FALSE; b->FXwindowHack = GL_FALSE; } /* fprintf(stderr, "voodoo %d, wid %d height %d hack: usable %d active %d\n", hw, b->mesa_buffer.Width, b->mesa_buffer.Height, b->FXisHackUsable, b->FXwindowHack); */ } } else { _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); } } #endif /** * Create a new XMesaBuffer from an X pixmap. * * \param v the XMesaVisual * \param p the pixmap * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or * \c GLX_DIRECT_COLOR visual for the pixmap * \returns new XMesaBuffer or NULL if error */ PUBLIC XMesaBuffer XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) { int client = 0; XMesaBuffer b; assert(v); b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); if (!b) return NULL; #ifdef XFree86Server client = CLIENT_ID(((XMesaDrawable)p)->id); #endif if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, (XMesaDrawable) p, cmap)) { xmesa_free_buffer(b); return NULL; } return b; } XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, unsigned int width, unsigned int height) { #ifdef XFree86Server return 0; #else int client = 0; XMesaWindow root; XMesaDrawable drawable; /* X Pixmap Drawable */ XMesaBuffer b; /* allocate pixmap for front buffer */ root = RootWindow( v->display, v->visinfo->screen ); drawable = XCreatePixmap(v->display, root, width, height, v->visinfo->depth); if (!drawable) return NULL; b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); if (!b) return NULL; if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, drawable, cmap)) { xmesa_free_buffer(b); return NULL; } return b; #endif } /* * Deallocate an XMesaBuffer structure and all related info. */ PUBLIC void XMesaDestroyBuffer(XMesaBuffer b) { xmesa_free_buffer(b); } /** * Query the current window size and update the corresponding GLframebuffer * and all attached renderbuffers. * Called when: * 1. the first time a buffer is bound to a context. * 2. from glViewport to poll for window size changes * 3. from the XMesaResizeBuffers() API function. * Note: it's possible (and legal) for xmctx to be NULL. That can happen * when resizing a buffer when no rendering context is bound. */ void xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) { GLuint width, height; xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); if (drawBuffer->mesa_buffer.Width != width || drawBuffer->mesa_buffer.Height != height) { GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); } drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ } /* * Bind buffer b to context c and make c the current rendering context. */ GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) { return XMesaMakeCurrent2( c, b, b ); } /* * Bind buffer b to context c and make c the current rendering context. */ PUBLIC GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, XMesaBuffer readBuffer ) { if (c) { if (!drawBuffer || !readBuffer) return GL_FALSE; /* must specify buffers! */ #ifdef FX if (drawBuffer->FXctx) { fxMesaMakeCurrent(drawBuffer->FXctx); c->xm_buffer = drawBuffer; return GL_TRUE; } #endif if (&(c->mesa) == _mesa_get_current_context() && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer && c->mesa.ReadBuffer == &readBuffer->mesa_buffer && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { /* same context and buffer, do nothing */ return GL_TRUE; } c->xm_buffer = drawBuffer; /* Call this periodically to detect when the user has begun using * GL rendering from multiple threads. */ _glapi_check_multithread(); xmesa_check_and_update_buffer_size(c, drawBuffer); if (readBuffer != drawBuffer) xmesa_check_and_update_buffer_size(c, readBuffer); _mesa_make_current(&(c->mesa), &drawBuffer->mesa_buffer, &readBuffer->mesa_buffer); if (c->xm_visual->mesa_visual.rgbMode) { /* * Must recompute and set these pixel values because colormap * can be different for different windows. */ c->clearpixel = xmesa_color_to_pixel( &c->mesa, c->clearcolor[0], c->clearcolor[1], c->clearcolor[2], c->clearcolor[3], c->xm_visual->undithered_pf); XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); } /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ drawBuffer->wasCurrent = GL_TRUE; } else { /* Detach */ _mesa_make_current( NULL, NULL, NULL ); } return GL_TRUE; } /* * Unbind the context c from its buffer. */ GLboolean XMesaUnbindContext( XMesaContext c ) { /* A no-op for XFree86 integration purposes */ return GL_TRUE; } XMesaContext XMesaGetCurrentContext( void ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { XMesaContext xmesa = XMESA_CONTEXT(ctx); return xmesa; } else { return 0; } } XMesaBuffer XMesaGetCurrentBuffer( void ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); return xmbuf; } else { return 0; } } /* New in Mesa 3.1 */ XMesaBuffer XMesaGetCurrentReadBuffer( void ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { return XMESA_BUFFER(ctx->ReadBuffer); } else { return 0; } } #ifdef XFree86Server PUBLIC GLboolean XMesaForceCurrent(XMesaContext c) { if (c) { #ifdef XGLServer _glapi_set_dispatch(c->mesa.CurrentDispatch); #endif if (&(c->mesa) != _mesa_get_current_context()) { _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); } } else { _mesa_make_current(NULL, NULL, NULL); } return GL_TRUE; } PUBLIC GLboolean XMesaLoseCurrent(XMesaContext c) { (void) c; _mesa_make_current(NULL, NULL, NULL); return GL_TRUE; } PUBLIC GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) { _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); return GL_TRUE; } #endif /* XFree86Server */ /* * Switch 3Dfx support hack between window and full-screen mode. */ #ifdef FX GLboolean XMesaSetFXmode( GLint mode ) { const char *fx = _mesa_getenv("MESA_GLX_FX"); if (fx && fx[0] != 'd') { GET_CURRENT_CONTEXT(ctx); GrHwConfiguration hw; if (!FX_grSstQueryHardware(&hw)) { /*fprintf(stderr, "!grSstQueryHardware\n");*/ return GL_FALSE; } if (hw.num_sst < 1) { /*fprintf(stderr, "hw.num_sst < 1\n");*/ return GL_FALSE; } if (ctx) { /* [dBorca] Hack alert: * oh, this is sooo wrong: ctx above is * really an fxMesaContext, not an XMesaContext */ XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); if (mode == XMESA_FX_WINDOW) { if (xmbuf->FXisHackUsable) { FX_grSstControl(GR_CONTROL_DEACTIVATE); xmbuf->FXwindowHack = GL_TRUE; return GL_TRUE; } } else if (mode == XMESA_FX_FULLSCREEN) { FX_grSstControl(GR_CONTROL_ACTIVATE); xmbuf->FXwindowHack = GL_FALSE; return GL_TRUE; } else { /* Error: Bad mode value */ } } } /*fprintf(stderr, "fallthrough\n");*/ return GL_FALSE; } #else GLboolean XMesaSetFXmode( GLint mode ) { (void) mode; return GL_FALSE; } #endif #ifdef FX /* * Read image from VooDoo frame buffer into X/Mesa's back XImage. */ static void FXgetImage( XMesaBuffer b ) { GET_CURRENT_CONTEXT(ctx); static unsigned short pixbuf[MAX_WIDTH]; GLuint x, y; GLuint width, height; XMesaContext xmesa = XMESA_CONTEXT(ctx); #ifdef XFree86Server x = b->frontxrb->pixmap->x; y = b->frontxrb->pixmap->y; width = b->frontxrb->pixmap->width; height = b->frontxrb->pixmap->height; depth = b->frontxrb->pixmap->depth; #else xmesa_get_window_size(b->display, b, &width, &height); x = y = 0; #endif if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); if (b->mesa_buffer.Width & 1) b->mesa_buffer.Width--; /* prevent odd width */ } /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ if (b->xm_visual->undithered_pf==PF_5R6G5B) { /* Special case: 16bpp RGB */ grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ b->mesa_buffer.Width * sizeof(GLushort), /* stride */ b->backxrb->ximage->data); /* dest buffer */ } else if (b->xm_visual->dithered_pf==PF_Dither && GET_VISUAL_DEPTH(b->xm_visual)==8) { /* Special case: 8bpp RGB */ for (y=0;ymesa_buffer.Height;y++) { GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data + b->backxrb->ximage->bytes_per_line * y; XDITHER_SETUP(y); /* read row from 3Dfx frame buffer */ grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 0, b->FXctx->height-(b->mesa_buffer.Height-y), b->mesa_buffer.Width, 1, 0, pixbuf ); /* write to XImage back buffer */ for (x=0;xmesa_buffer.Width;x++) { GLubyte r = (pixbuf[x] & 0xf800) >> 8; GLubyte g = (pixbuf[x] & 0x07e0) >> 3; GLubyte b = (pixbuf[x] & 0x001f) << 3; *ptr++ = XDITHER( x, r, g, b); } } } else { /* General case: slow! */ for (y=0;ymesa_buffer.Height;y++) { /* read row from 3Dfx frame buffer */ grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 0, b->FXctx->height-(b->mesa_buffer.Height-y), b->mesa_buffer.Width, 1, 0, pixbuf ); /* write to XImage back buffer */ for (x=0;xmesa_buffer.Width;x++) { XMesaPutPixel(b->backxrb->ximage,x,y, xmesa_color_to_pixel(ctx, (pixbuf[x] & 0xf800) >> 8, (pixbuf[x] & 0x07e0) >> 3, (pixbuf[x] & 0x001f) << 3, 0xff, b->xm_visual->undithered_pf)); } } } /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ } #endif /* * Copy the back buffer to the front buffer. If there's no back buffer * this is a no-op. */ PUBLIC void XMesaSwapBuffers( XMesaBuffer b ) { GET_CURRENT_CONTEXT(ctx); if (!b->backxrb) { /* single buffered */ return; } /* If we're swapping the buffer associated with the current context * we have to flush any pending rendering commands first. */ if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) _mesa_notifySwapBuffers(ctx); if (b->db_mode) { #ifdef FX if (b->FXctx) { fxMesaSwapBuffers(); if (b->FXwindowHack) FXgetImage(b); else return; } #endif if (b->backxrb->ximage) { /* Copy Ximage (back buf) from client memory to server window */ #if defined(USE_XSHM) && !defined(XFree86Server) if (b->shm) { /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, b->swapgc, b->backxrb->ximage, 0, 0, 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, False ); /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ } else #endif { /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, b->swapgc, b->backxrb->ximage, 0, 0, 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ } } else if (b->backxrb->pixmap) { /* Copy pixmap (back buf) to window (front buf) on server */ /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ XMesaCopyArea( b->xm_visual->display, b->backxrb->pixmap, /* source drawable */ b->frontxrb->drawable, /* dest. drawable */ b->swapgc, 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 0, 0 /* dest region */ ); /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ } if (b->swAlpha) _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); } #if !defined(XFree86Server) XSync( b->xm_visual->display, False ); #endif } /* * Copy sub-region of back buffer to front buffer */ void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) { 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 (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) _mesa_notifySwapBuffers(ctx); if (!b->backxrb) { /* single buffered */ return; } if (b->db_mode) { int yTop = b->mesa_buffer.Height - y - height; #ifdef FX if (b->FXctx) { fxMesaSwapBuffers(); if (b->FXwindowHack) FXgetImage(b); else return; } #endif if (b->backxrb->ximage) { /* Copy Ximage from host's memory to server's window */ #if defined(USE_XSHM) && !defined(XFree86Server) if (b->shm) { /* XXX assuming width and height aren't too large! */ XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, b->swapgc, b->backxrb->ximage, x, yTop, x, yTop, width, height, False ); /* wait for finished event??? */ } else #endif { /* XXX assuming width and height aren't too large! */ XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, b->swapgc, b->backxrb->ximage, x, yTop, x, yTop, width, height ); } } else { /* Copy pixmap to window on server */ XMesaCopyArea( b->xm_visual->display, b->backxrb->pixmap, /* source drawable */ b->frontxrb->drawable, /* dest. drawable */ b->swapgc, x, yTop, width, height, /* source region */ x, yTop /* dest region */ ); } } } /* * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function * is a way to get "under the hood" of X/Mesa so one can manipulate the * back buffer directly. * Output: pixmap - pointer to back buffer's Pixmap, or 0 * ximage - pointer to back buffer's XImage, or NULL * Return: GL_TRUE = context is double buffered * GL_FALSE = context is single buffered */ #ifndef XFree86Server GLboolean XMesaGetBackBuffer( XMesaBuffer b, XMesaPixmap *pixmap, XMesaImage **ximage ) { if (b->db_mode) { if (pixmap) *pixmap = b->backxrb->pixmap; if (ximage) *ximage = b->backxrb->ximage; return GL_TRUE; } else { *pixmap = 0; *ximage = NULL; return GL_FALSE; } } #endif /* XFree86Server */ /* * Return the depth buffer associated with an XMesaBuffer. * Input: b - the XMesa buffer handle * Output: width, height - size of buffer in pixels * bytesPerValue - bytes per depth value (2 or 4) * buffer - pointer to depth buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, GLint *bytesPerValue, void **buffer ) { struct gl_renderbuffer *rb = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; if (!rb || !rb->Data) { *width = 0; *height = 0; *bytesPerValue = 0; *buffer = 0; return GL_FALSE; } else { *width = b->mesa_buffer.Width; *height = b->mesa_buffer.Height; *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 ? sizeof(GLushort) : sizeof(GLuint); *buffer = rb->Data; return GL_TRUE; } } void XMesaFlush( XMesaContext c ) { if (c && c->xm_visual) { #ifdef XFree86Server /* NOT_NEEDED */ #else XSync( c->xm_visual->display, False ); #endif } } const char *XMesaGetString( XMesaContext c, int name ) { (void) c; if (name==XMESA_VERSION) { return "5.0"; } else if (name==XMESA_EXTENSIONS) { return ""; } else { return NULL; } } XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) { XMesaBuffer b; for (b=XMesaBufferList; b; b=b->Next) { if (b->frontxrb->drawable == d && b->display == dpy) { return b; } } return NULL; } /** * Free/destroy all XMesaBuffers associated with given display. */ void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) { XMesaBuffer b, next; for (b = XMesaBufferList; b; b = next) { next = b->Next; if (b->display == dpy) { xmesa_free_buffer(b); } } } /* * Look for XMesaBuffers whose X window has been destroyed. * Deallocate any such XMesaBuffers. */ void XMesaGarbageCollect( void ) { XMesaBuffer b, next; for (b=XMesaBufferList; b; b=next) { next = b->Next; if (b->display && b->frontxrb->drawable && b->type == WINDOW) { #ifdef XFree86Server /* NOT_NEEDED */ #else XSync(b->display, False); if (!window_exists( b->display, b->frontxrb->drawable )) { /* found a dead window, free the ancillary info */ XMesaDestroyBuffer( b ); } #endif } } } unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha ) { GLcontext *ctx = &xmesa->mesa; GLint r = (GLint) (red * 255.0F); GLint g = (GLint) (green * 255.0F); GLint b = (GLint) (blue * 255.0F); GLint a = (GLint) (alpha * 255.0F); switch (xmesa->pixelformat) { case PF_Index: return 0; case PF_Truecolor: { unsigned long p; PACK_TRUECOLOR( p, r, g, b ); return p; } case PF_8A8B8G8R: return PACK_8A8B8G8R( r, g, b, a ); case PF_8A8R8G8B: return PACK_8A8R8G8B( r, g, b, a ); case PF_8R8G8B: return PACK_8R8G8B( r, g, b ); case PF_5R6G5B: return PACK_5R6G5B( r, g, b ); case PF_Dither: { DITHER_SETUP; return DITHER( x, y, r, g, b ); } case PF_1Bit: /* 382 = (3*255)/2 */ return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; case PF_HPCR: return DITHER_HPCR(x, y, r, g, b); case PF_Lookup: { LOOKUP_SETUP; return LOOKUP( r, g, b ); } case PF_Grayscale: return GRAY_RGB( r, g, b ); case PF_Dither_5R6G5B: /* fall through */ case PF_Dither_True: { unsigned long p; PACK_TRUEDITHER(p, x, y, r, g, b); return p; } default: _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); } return 0; } /* * This is typically called when the window size changes and we need * to reallocate the buffer's back/depth/stencil/accum buffers. */ PUBLIC void XMesaResizeBuffers( XMesaBuffer b ) { GET_CURRENT_CONTEXT(ctx); XMesaContext xmctx = XMESA_CONTEXT(ctx); if (!xmctx) return; xmesa_check_and_update_buffer_size(xmctx, b); }