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-rw-r--r--src/mesa/main/pixel.c774
1 files changed, 774 insertions, 0 deletions
diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c
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+++ b/src/mesa/main/pixel.c
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+/* $Id: pixel.c,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.1
+ *
+ * Copyright (C) 1999 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.
+ */
+
+
+
+
+
+/*
+ * glPixelStore, glPixelTransfer, glPixelMap, glPixelZoom, etc.
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "context.h"
+#include "macros.h"
+#include "pixel.h"
+#include "types.h"
+#ifdef XFree86Server
+#include "GL/xf86glx.h"
+#endif
+#endif
+
+
+
+/**********************************************************************/
+/***** glPixelZoom *****/
+/**********************************************************************/
+
+
+
+void gl_PixelZoom( GLcontext *ctx, GLfloat xfactor, GLfloat yfactor )
+{
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelZoom");
+
+ ctx->Pixel.ZoomX = xfactor;
+ ctx->Pixel.ZoomY = yfactor;
+}
+
+
+
+/**********************************************************************/
+/***** glPixelStore *****/
+/**********************************************************************/
+
+
+void gl_PixelStorei( GLcontext *ctx, GLenum pname, GLint param )
+{
+ /* NOTE: this call can't be compiled into the display list */
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelStore");
+
+
+ switch (pname) {
+ case GL_PACK_SWAP_BYTES:
+ ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_PACK_LSB_FIRST:
+ ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_PACK_ROW_LENGTH:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Pack.RowLength = param;
+ }
+ break;
+ case GL_PACK_IMAGE_HEIGHT:
+ if (param<0)
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ else
+ ctx->Pack.ImageHeight = param;
+ break;
+ case GL_PACK_SKIP_PIXELS:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Pack.SkipPixels = param;
+ }
+ break;
+ case GL_PACK_SKIP_ROWS:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Pack.SkipRows = param;
+ }
+ break;
+ case GL_PACK_ALIGNMENT:
+ if (param==1 || param==2 || param==4 || param==8) {
+ ctx->Pack.Alignment = param;
+ }
+ else {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ break;
+ case GL_UNPACK_SWAP_BYTES:
+ ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_UNPACK_LSB_FIRST:
+ ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_UNPACK_ROW_LENGTH:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Unpack.RowLength = param;
+ }
+ break;
+ case GL_UNPACK_IMAGE_HEIGHT:
+ if (param<0)
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ else
+ ctx->Unpack.ImageHeight = param;
+ break;
+ case GL_UNPACK_SKIP_PIXELS:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Unpack.SkipPixels = param;
+ }
+ break;
+ case GL_UNPACK_SKIP_ROWS:
+ if (param<0) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" );
+ }
+ else {
+ ctx->Unpack.SkipRows = param;
+ }
+ break;
+ case GL_UNPACK_ALIGNMENT:
+ if (param==1 || param==2 || param==4 || param==8) {
+ ctx->Unpack.Alignment = param;
+ }
+ else {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelStore" );
+ }
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glPixelStore" );
+ }
+}
+
+
+
+
+
+/**********************************************************************/
+/***** glPixelMap *****/
+/**********************************************************************/
+
+
+
+void gl_PixelMapfv( GLcontext *ctx,
+ GLenum map, GLint mapsize, const GLfloat *values )
+{
+ GLint i;
+
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelMapfv");
+
+
+ if (mapsize<0 || mapsize>MAX_PIXEL_MAP_TABLE) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
+ return;
+ }
+
+ if (map>=GL_PIXEL_MAP_S_TO_S && map<=GL_PIXEL_MAP_I_TO_A) {
+ /* test that mapsize is a power of two */
+ GLuint p;
+ GLboolean ok = GL_FALSE;
+ for (p=1; p<=MAX_PIXEL_MAP_TABLE; p=p<<1) {
+ if ( (p&mapsize) == p ) {
+ ok = GL_TRUE;
+ break;
+ }
+ }
+ if (!ok) {
+ gl_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
+ return;
+ }
+ }
+
+ switch (map) {
+ case GL_PIXEL_MAP_S_TO_S:
+ ctx->Pixel.MapStoSsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapStoS[i] = (GLint) values[i];
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_I:
+ ctx->Pixel.MapItoIsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapItoI[i] = (GLint) values[i];
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_R:
+ ctx->Pixel.MapItoRsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ GLfloat val = CLAMP( values[i], 0.0, 1.0 );
+ ctx->Pixel.MapItoR[i] = val;
+ ctx->Pixel.MapItoR8[i] = (GLint) (val * 255.0F);
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_G:
+ ctx->Pixel.MapItoGsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ GLfloat val = CLAMP( values[i], 0.0, 1.0 );
+ ctx->Pixel.MapItoG[i] = val;
+ ctx->Pixel.MapItoG8[i] = (GLint) (val * 255.0F);
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_B:
+ ctx->Pixel.MapItoBsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ GLfloat val = CLAMP( values[i], 0.0, 1.0 );
+ ctx->Pixel.MapItoB[i] = val;
+ ctx->Pixel.MapItoB8[i] = (GLint) (val * 255.0F);
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_A:
+ ctx->Pixel.MapItoAsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ GLfloat val = CLAMP( values[i], 0.0, 1.0 );
+ ctx->Pixel.MapItoA[i] = val;
+ ctx->Pixel.MapItoA8[i] = (GLint) (val * 255.0F);
+ }
+ break;
+ case GL_PIXEL_MAP_R_TO_R:
+ ctx->Pixel.MapRtoRsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapRtoR[i] = CLAMP( values[i], 0.0, 1.0 );
+ }
+ break;
+ case GL_PIXEL_MAP_G_TO_G:
+ ctx->Pixel.MapGtoGsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapGtoG[i] = CLAMP( values[i], 0.0, 1.0 );
+ }
+ break;
+ case GL_PIXEL_MAP_B_TO_B:
+ ctx->Pixel.MapBtoBsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapBtoB[i] = CLAMP( values[i], 0.0, 1.0 );
+ }
+ break;
+ case GL_PIXEL_MAP_A_TO_A:
+ ctx->Pixel.MapAtoAsize = mapsize;
+ for (i=0;i<mapsize;i++) {
+ ctx->Pixel.MapAtoA[i] = CLAMP( values[i], 0.0, 1.0 );
+ }
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glPixelMapfv(map)" );
+ }
+}
+
+
+
+
+
+void gl_GetPixelMapfv( GLcontext *ctx, GLenum map, GLfloat *values )
+{
+ GLint i;
+
+ ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
+
+ switch (map) {
+ case GL_PIXEL_MAP_I_TO_I:
+ for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
+ values[i] = (GLfloat) ctx->Pixel.MapItoI[i];
+ }
+ break;
+ case GL_PIXEL_MAP_S_TO_S:
+ for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
+ values[i] = (GLfloat) ctx->Pixel.MapStoS[i];
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_R:
+ MEMCPY(values,ctx->Pixel.MapItoR,ctx->Pixel.MapItoRsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_I_TO_G:
+ MEMCPY(values,ctx->Pixel.MapItoG,ctx->Pixel.MapItoGsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_I_TO_B:
+ MEMCPY(values,ctx->Pixel.MapItoB,ctx->Pixel.MapItoBsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_I_TO_A:
+ MEMCPY(values,ctx->Pixel.MapItoA,ctx->Pixel.MapItoAsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_R_TO_R:
+ MEMCPY(values,ctx->Pixel.MapRtoR,ctx->Pixel.MapRtoRsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_G_TO_G:
+ MEMCPY(values,ctx->Pixel.MapGtoG,ctx->Pixel.MapGtoGsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_B_TO_B:
+ MEMCPY(values,ctx->Pixel.MapBtoB,ctx->Pixel.MapBtoBsize*sizeof(GLfloat));
+ break;
+ case GL_PIXEL_MAP_A_TO_A:
+ MEMCPY(values,ctx->Pixel.MapAtoA,ctx->Pixel.MapAtoAsize*sizeof(GLfloat));
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+ }
+}
+
+
+void gl_GetPixelMapuiv( GLcontext *ctx, GLenum map, GLuint *values )
+{
+ GLint i;
+
+ ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
+
+ switch (map) {
+ case GL_PIXEL_MAP_I_TO_I:
+ MEMCPY(values, ctx->Pixel.MapItoI, ctx->Pixel.MapItoIsize*sizeof(GLint));
+ break;
+ case GL_PIXEL_MAP_S_TO_S:
+ MEMCPY(values, ctx->Pixel.MapStoS, ctx->Pixel.MapStoSsize*sizeof(GLint));
+ break;
+ case GL_PIXEL_MAP_I_TO_R:
+ for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoR[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_G:
+ for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoG[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_B:
+ for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoB[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_A:
+ for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoA[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_R_TO_R:
+ for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapRtoR[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_G_TO_G:
+ for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapGtoG[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_B_TO_B:
+ for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapBtoB[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_A_TO_A:
+ for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
+ values[i] = FLOAT_TO_UINT( ctx->Pixel.MapAtoA[i] );
+ }
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+ }
+}
+
+
+void gl_GetPixelMapusv( GLcontext *ctx, GLenum map, GLushort *values )
+{
+ GLint i;
+
+ ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetPixelMapfv");
+
+ switch (map) {
+ case GL_PIXEL_MAP_I_TO_I:
+ for (i=0;i<ctx->Pixel.MapItoIsize;i++) {
+ values[i] = (GLushort) ctx->Pixel.MapItoI[i];
+ }
+ break;
+ case GL_PIXEL_MAP_S_TO_S:
+ for (i=0;i<ctx->Pixel.MapStoSsize;i++) {
+ values[i] = (GLushort) ctx->Pixel.MapStoS[i];
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_R:
+ for (i=0;i<ctx->Pixel.MapItoRsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoR[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_G:
+ for (i=0;i<ctx->Pixel.MapItoGsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoG[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_B:
+ for (i=0;i<ctx->Pixel.MapItoBsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoB[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_I_TO_A:
+ for (i=0;i<ctx->Pixel.MapItoAsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoA[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_R_TO_R:
+ for (i=0;i<ctx->Pixel.MapRtoRsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapRtoR[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_G_TO_G:
+ for (i=0;i<ctx->Pixel.MapGtoGsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapGtoG[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_B_TO_B:
+ for (i=0;i<ctx->Pixel.MapBtoBsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapBtoB[i] );
+ }
+ break;
+ case GL_PIXEL_MAP_A_TO_A:
+ for (i=0;i<ctx->Pixel.MapAtoAsize;i++) {
+ values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapAtoA[i] );
+ }
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" );
+ }
+}
+
+
+
+/**********************************************************************/
+/***** glPixelTransfer *****/
+/**********************************************************************/
+
+
+/*
+ * Implements glPixelTransfer[fi] whether called immediately or from a
+ * display list.
+ */
+void gl_PixelTransferf( GLcontext *ctx, GLenum pname, GLfloat param )
+{
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPixelTransfer");
+
+
+ switch (pname) {
+ case GL_MAP_COLOR:
+ ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_MAP_STENCIL:
+ ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
+ break;
+ case GL_INDEX_SHIFT:
+ ctx->Pixel.IndexShift = (GLint) param;
+ break;
+ case GL_INDEX_OFFSET:
+ ctx->Pixel.IndexOffset = (GLint) param;
+ break;
+ case GL_RED_SCALE:
+ ctx->Pixel.RedScale = param;
+ break;
+ case GL_RED_BIAS:
+ ctx->Pixel.RedBias = param;
+ break;
+ case GL_GREEN_SCALE:
+ ctx->Pixel.GreenScale = param;
+ break;
+ case GL_GREEN_BIAS:
+ ctx->Pixel.GreenBias = param;
+ break;
+ case GL_BLUE_SCALE:
+ ctx->Pixel.BlueScale = param;
+ break;
+ case GL_BLUE_BIAS:
+ ctx->Pixel.BlueBias = param;
+ break;
+ case GL_ALPHA_SCALE:
+ ctx->Pixel.AlphaScale = param;
+ break;
+ case GL_ALPHA_BIAS:
+ ctx->Pixel.AlphaBias = param;
+ break;
+ case GL_DEPTH_SCALE:
+ ctx->Pixel.DepthScale = param;
+ break;
+ case GL_DEPTH_BIAS:
+ ctx->Pixel.DepthBias = param;
+ break;
+ default:
+ gl_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
+ return;
+ }
+
+ if (ctx->Pixel.RedScale!=1.0F || ctx->Pixel.RedBias!=0.0F ||
+ ctx->Pixel.GreenScale!=1.0F || ctx->Pixel.GreenBias!=0.0F ||
+ ctx->Pixel.BlueScale!=1.0F || ctx->Pixel.BlueBias!=0.0F ||
+ ctx->Pixel.AlphaScale!=1.0F || ctx->Pixel.AlphaBias!=0.0F) {
+ ctx->Pixel.ScaleOrBiasRGBA = GL_TRUE;
+ }
+ else {
+ ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
+ }
+}
+
+
+
+
+/*
+ * Pixel processing functions
+ */
+
+
+/*
+ * Apply scale and bias factors to an array of RGBA pixels.
+ */
+void gl_scale_and_bias_color( const GLcontext *ctx, GLuint n,
+ GLfloat red[], GLfloat green[],
+ GLfloat blue[], GLfloat alpha[] )
+{
+ GLuint i;
+ for (i=0;i<n;i++) {
+ GLfloat r = red[i] * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
+ GLfloat g = green[i] * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
+ GLfloat b = blue[i] * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
+ GLfloat a = alpha[i] * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
+ red[i] = CLAMP( r, 0.0F, 1.0F );
+ green[i] = CLAMP( g, 0.0F, 1.0F );
+ blue[i] = CLAMP( b, 0.0F, 1.0F );
+ alpha[i] = CLAMP( a, 0.0F, 1.0F );
+ }
+}
+
+
+/*
+ * Apply scale and bias factors to an array of RGBA pixels.
+ */
+void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
+{
+ GLfloat rbias = ctx->Pixel.RedBias * 255.0F;
+ GLfloat gbias = ctx->Pixel.GreenBias * 255.0F;
+ GLfloat bbias = ctx->Pixel.BlueBias * 255.0F;
+ GLfloat abias = ctx->Pixel.AlphaBias * 255.0F;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ GLint r = (GLint) (rgba[i][RCOMP] * ctx->Pixel.RedScale + rbias);
+ GLint g = (GLint) (rgba[i][GCOMP] * ctx->Pixel.GreenScale + gbias);
+ GLint b = (GLint) (rgba[i][BCOMP] * ctx->Pixel.BlueScale + bbias);
+ GLint a = (GLint) (rgba[i][ACOMP] * ctx->Pixel.AlphaScale + abias);
+ rgba[i][RCOMP] = CLAMP( r, 0, 255 );
+ rgba[i][GCOMP] = CLAMP( g, 0, 255 );
+ rgba[i][BCOMP] = CLAMP( b, 0, 255 );
+ rgba[i][ACOMP] = CLAMP( a, 0, 255 );
+ }
+}
+
+
+/*
+ * Apply pixel mapping to an array of RGBA pixels.
+ */
+void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
+{
+ GLfloat rscale = (ctx->Pixel.MapRtoRsize - 1) / 255.0F;
+ GLfloat gscale = (ctx->Pixel.MapGtoGsize - 1) / 255.0F;
+ GLfloat bscale = (ctx->Pixel.MapBtoBsize - 1) / 255.0F;
+ GLfloat ascale = (ctx->Pixel.MapAtoAsize - 1) / 255.0F;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ GLint ir = (GLint) (rgba[i][RCOMP] * rscale);
+ GLint ig = (GLint) (rgba[i][GCOMP] * gscale);
+ GLint ib = (GLint) (rgba[i][BCOMP] * bscale);
+ GLint ia = (GLint) (rgba[i][ACOMP] * ascale);
+ rgba[i][RCOMP] = (GLint) (ctx->Pixel.MapRtoR[ir] * 255.0F);
+ rgba[i][GCOMP] = (GLint) (ctx->Pixel.MapGtoG[ig] * 255.0F);
+ rgba[i][BCOMP] = (GLint) (ctx->Pixel.MapBtoB[ib] * 255.0F);
+ rgba[i][ACOMP] = (GLint) (ctx->Pixel.MapAtoA[ia] * 255.0F);
+ }
+}
+
+
+/*
+ * Apply pixel mapping to an array of RGBA pixels.
+ */
+void gl_map_color( const GLcontext *ctx, GLuint n,
+ GLfloat red[], GLfloat green[],
+ GLfloat blue[], GLfloat alpha[] )
+{
+ GLfloat rscale = ctx->Pixel.MapRtoRsize-1;
+ GLfloat gscale = ctx->Pixel.MapGtoGsize-1;
+ GLfloat bscale = ctx->Pixel.MapBtoBsize-1;
+ GLfloat ascale = ctx->Pixel.MapAtoAsize-1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ red[i] = ctx->Pixel.MapRtoR[ (GLint) (red[i] * rscale) ];
+ green[i] = ctx->Pixel.MapGtoG[ (GLint) (green[i] * gscale) ];
+ blue[i] = ctx->Pixel.MapBtoB[ (GLint) (blue[i] * bscale) ];
+ alpha[i] = ctx->Pixel.MapAtoA[ (GLint) (alpha[i] * ascale) ];
+ }
+}
+
+
+
+/*
+ * Apply color index shift and offset to an array of pixels.
+ */
+void gl_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
+{
+ GLint shift = ctx->Pixel.IndexShift;
+ GLint offset = ctx->Pixel.IndexOffset;
+ GLuint i;
+ if (shift > 0) {
+ for (i=0;i<n;i++) {
+ indexes[i] = (indexes[i] << shift) + offset;
+ }
+ }
+ else if (shift < 0) {
+ shift = -shift;
+ for (i=0;i<n;i++) {
+ indexes[i] = (indexes[i] >> shift) + offset;
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ indexes[i] = indexes[i] + offset;
+ }
+ }
+}
+
+
+/*
+ * Apply color index mapping to color indexes.
+ */
+void gl_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
+{
+ GLuint mask = ctx->Pixel.MapItoIsize - 1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ index[i] = ctx->Pixel.MapItoI[ index[i] & mask ];
+ }
+}
+
+
+/*
+ * Map color indexes to rgb values.
+ */
+void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
+ GLubyte rgba[][4] )
+{
+ GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+ GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+ GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+ GLuint amask = ctx->Pixel.MapItoAsize - 1;
+ const GLubyte *rMap = ctx->Pixel.MapItoR8;
+ const GLubyte *gMap = ctx->Pixel.MapItoG8;
+ const GLubyte *bMap = ctx->Pixel.MapItoB8;
+ const GLubyte *aMap = ctx->Pixel.MapItoA8;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ rgba[i][RCOMP] = rMap[index[i] & rmask];
+ rgba[i][GCOMP] = gMap[index[i] & gmask];
+ rgba[i][BCOMP] = bMap[index[i] & bmask];
+ rgba[i][ACOMP] = aMap[index[i] & amask];
+ }
+}
+
+
+/*
+ * Map 8-bit color indexes to rgb values.
+ */
+void gl_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
+ GLubyte rgba[][4] )
+{
+ GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+ GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+ GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+ GLuint amask = ctx->Pixel.MapItoAsize - 1;
+ const GLubyte *rMap = ctx->Pixel.MapItoR8;
+ const GLubyte *gMap = ctx->Pixel.MapItoG8;
+ const GLubyte *bMap = ctx->Pixel.MapItoB8;
+ const GLubyte *aMap = ctx->Pixel.MapItoA8;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ rgba[i][RCOMP] = rMap[index[i] & rmask];
+ rgba[i][GCOMP] = gMap[index[i] & gmask];
+ rgba[i][BCOMP] = bMap[index[i] & bmask];
+ rgba[i][ACOMP] = aMap[index[i] & amask];
+ }
+}
+
+
+void gl_map_ci_to_color( const GLcontext *ctx, GLuint n, const GLuint index[],
+ GLfloat r[], GLfloat g[],
+ GLfloat b[], GLfloat a[] )
+{
+ GLuint rmask = ctx->Pixel.MapItoRsize - 1;
+ GLuint gmask = ctx->Pixel.MapItoGsize - 1;
+ GLuint bmask = ctx->Pixel.MapItoBsize - 1;
+ GLuint amask = ctx->Pixel.MapItoAsize - 1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ r[i] = ctx->Pixel.MapItoR[index[i] & rmask];
+ g[i] = ctx->Pixel.MapItoG[index[i] & gmask];
+ b[i] = ctx->Pixel.MapItoB[index[i] & bmask];
+ a[i] = ctx->Pixel.MapItoA[index[i] & amask];
+ }
+}
+
+
+
+void gl_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
+ GLstencil stencil[] )
+{
+ GLuint i;
+ GLint shift = ctx->Pixel.IndexShift;
+ GLint offset = ctx->Pixel.IndexOffset;
+ if (shift > 0) {
+ for (i=0;i<n;i++) {
+ stencil[i] = (stencil[i] << shift) + offset;
+ }
+ }
+ else if (shift < 0) {
+ shift = -shift;
+ for (i=0;i<n;i++) {
+ stencil[i] = (stencil[i] >> shift) + offset;
+ }
+ }
+ else {
+ for (i=0;i<n;i++) {
+ stencil[i] = stencil[i] + offset;
+ }
+ }
+
+}
+
+
+
+void gl_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
+{
+ GLuint mask = ctx->Pixel.MapStoSsize - 1;
+ GLuint i;
+ for (i=0;i<n;i++) {
+ stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ];
+ }
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-28 01:40:48 +0000