+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2008 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 pixel.c
- * Pixel transfer functions (glPixelZoom, glPixelMap, glPixelTransfer)
- */
-
-#include <precomp.h>
-
-#if FEATURE_pixel_transfer
-
-
-/**********************************************************************/
-/***** glPixelZoom *****/
-/**********************************************************************/
-
-static void GLAPIENTRY
-_mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor )
-{
- GET_CURRENT_CONTEXT(ctx);
-
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->Pixel.ZoomX == xfactor &&
- ctx->Pixel.ZoomY == yfactor)
- return;
-
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.ZoomX = xfactor;
- ctx->Pixel.ZoomY = yfactor;
-}
-
-
-
-/**********************************************************************/
-/***** glPixelMap *****/
-/**********************************************************************/
-
-/**
- * Return pointer to a pixelmap by name.
- */
-static struct gl_pixelmap *
-get_pixelmap(struct gl_context *ctx, GLenum map)
-{
- switch (map) {
- case GL_PIXEL_MAP_I_TO_I:
- return &ctx->PixelMaps.ItoI;
- case GL_PIXEL_MAP_S_TO_S:
- return &ctx->PixelMaps.StoS;
- case GL_PIXEL_MAP_I_TO_R:
- return &ctx->PixelMaps.ItoR;
- case GL_PIXEL_MAP_I_TO_G:
- return &ctx->PixelMaps.ItoG;
- case GL_PIXEL_MAP_I_TO_B:
- return &ctx->PixelMaps.ItoB;
- case GL_PIXEL_MAP_I_TO_A:
- return &ctx->PixelMaps.ItoA;
- case GL_PIXEL_MAP_R_TO_R:
- return &ctx->PixelMaps.RtoR;
- case GL_PIXEL_MAP_G_TO_G:
- return &ctx->PixelMaps.GtoG;
- case GL_PIXEL_MAP_B_TO_B:
- return &ctx->PixelMaps.BtoB;
- case GL_PIXEL_MAP_A_TO_A:
- return &ctx->PixelMaps.AtoA;
- default:
- return NULL;
- }
-}
-
-
-/**
- * Helper routine used by the other _mesa_PixelMap() functions.
- */
-static void
-store_pixelmap(struct gl_context *ctx, GLenum map, GLsizei mapsize,
- const GLfloat *values)
-{
- GLint i;
- struct gl_pixelmap *pm = get_pixelmap(ctx, map);
- if (!pm) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glPixelMap(map)");
- return;
- }
-
- switch (map) {
- case GL_PIXEL_MAP_S_TO_S:
- /* special case */
- ctx->PixelMaps.StoS.Size = mapsize;
- for (i = 0; i < mapsize; i++) {
- ctx->PixelMaps.StoS.Map[i] = (GLfloat)IROUND(values[i]);
- }
- break;
- case GL_PIXEL_MAP_I_TO_I:
- /* special case */
- ctx->PixelMaps.ItoI.Size = mapsize;
- for (i = 0; i < mapsize; i++) {
- ctx->PixelMaps.ItoI.Map[i] = values[i];
- }
- break;
- default:
- /* general case */
- pm->Size = mapsize;
- for (i = 0; i < mapsize; i++) {
- GLfloat val = CLAMP(values[i], 0.0F, 1.0F);
- pm->Map[i] = val;
- pm->Map8[i] = (GLint) (val * 255.0F);
- }
- }
-}
-
-
-static void GLAPIENTRY
-_mesa_PixelMapfv( GLenum map, GLsizei mapsize, const GLfloat *values )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- /* XXX someday, test against ctx->Const.MaxPixelMapTableSize */
- if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
- _mesa_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 */
- if (!_mesa_is_pow_two(mapsize)) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" );
- return;
- }
- }
-
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
-
- if (!values) {
- return;
- }
-
- store_pixelmap(ctx, map, mapsize, values);
-}
-
-
-static void GLAPIENTRY
-_mesa_PixelMapuiv(GLenum map, GLsizei mapsize, const GLuint *values )
-{
- GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(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 */
- if (!_mesa_is_pow_two(mapsize)) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
- return;
- }
- }
-
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
-
- if (!values) {
- return;
- }
-
- /* convert to floats */
- if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
- GLint i;
- for (i = 0; i < mapsize; i++) {
- fvalues[i] = (GLfloat) values[i];
- }
- }
- else {
- GLint i;
- for (i = 0; i < mapsize; i++) {
- fvalues[i] = UINT_TO_FLOAT( values[i] );
- }
- }
-
- store_pixelmap(ctx, map, mapsize, fvalues);
-}
-
-
-static void GLAPIENTRY
-_mesa_PixelMapusv(GLenum map, GLsizei mapsize, const GLushort *values )
-{
- GLfloat fvalues[MAX_PIXEL_MAP_TABLE];
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapusv(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 */
- if (!_mesa_is_pow_two(mapsize)) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" );
- return;
- }
- }
-
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
-
- if (!values) {
- return;
- }
-
- /* convert to floats */
- if (map == GL_PIXEL_MAP_I_TO_I || map == GL_PIXEL_MAP_S_TO_S) {
- GLint i;
- for (i = 0; i < mapsize; i++) {
- fvalues[i] = (GLfloat) values[i];
- }
- }
- else {
- GLint i;
- for (i = 0; i < mapsize; i++) {
- fvalues[i] = USHORT_TO_FLOAT( values[i] );
- }
- }
-
- store_pixelmap(ctx, map, mapsize, fvalues);
-}
-
-
-static void GLAPIENTRY
-_mesa_GetPixelMapfv( GLenum map, GLfloat *values )
-{
- GET_CURRENT_CONTEXT(ctx);
- GLint mapsize, i;
- const struct gl_pixelmap *pm;
-
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- pm = get_pixelmap(ctx, map);
- if (!pm) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapfv(map)");
- return;
- }
-
- mapsize = pm->Size;
-
- if (!values) {
- return;
- }
-
- if (map == GL_PIXEL_MAP_S_TO_S) {
- /* special case */
- for (i = 0; i < mapsize; i++) {
- values[i] = (GLfloat) ctx->PixelMaps.StoS.Map[i];
- }
- }
- else {
- memcpy(values, pm->Map, mapsize * sizeof(GLfloat));
- }
-}
-
-
-static void GLAPIENTRY
-_mesa_GetPixelMapuiv( GLenum map, GLuint *values )
-{
- GET_CURRENT_CONTEXT(ctx);
- GLint mapsize, i;
- const struct gl_pixelmap *pm;
-
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- pm = get_pixelmap(ctx, map);
- if (!pm) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapuiv(map)");
- return;
- }
-
- mapsize = pm->Size;
-
- if (!values) {
- return;
- }
-
- if (map == GL_PIXEL_MAP_S_TO_S) {
- /* special case */
- memcpy(values, ctx->PixelMaps.StoS.Map, mapsize * sizeof(GLint));
- }
- else {
- for (i = 0; i < mapsize; i++) {
- values[i] = FLOAT_TO_UINT( pm->Map[i] );
- }
- }
-}
-
-
-static void GLAPIENTRY
-_mesa_GetPixelMapusv( GLenum map, GLushort *values )
-{
- GET_CURRENT_CONTEXT(ctx);
- GLint mapsize, i;
- const struct gl_pixelmap *pm;
-
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- pm = get_pixelmap(ctx, map);
- if (!pm) {
- _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapusv(map)");
- return;
- }
-
- mapsize = pm->Size;
-
- if (!values) {
- return;
- }
-
- switch (map) {
- /* special cases */
- case GL_PIXEL_MAP_I_TO_I:
- for (i = 0; i < mapsize; i++) {
- values[i] = (GLushort) CLAMP(ctx->PixelMaps.ItoI.Map[i], 0.0, 65535.);
- }
- break;
- case GL_PIXEL_MAP_S_TO_S:
- for (i = 0; i < mapsize; i++) {
- values[i] = (GLushort) CLAMP(ctx->PixelMaps.StoS.Map[i], 0.0, 65535.);
- }
- break;
- default:
- for (i = 0; i < mapsize; i++) {
- CLAMPED_FLOAT_TO_USHORT(values[i], pm->Map[i] );
- }
- }
-}
-
-
-/**********************************************************************/
-/***** glPixelTransfer *****/
-/**********************************************************************/
-
-
-/*
- * Implements glPixelTransfer[fi] whether called immediately or from a
- * display list.
- */
-void GLAPIENTRY
-_mesa_PixelTransferf( GLenum pname, GLfloat param )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- switch (pname) {
- case GL_MAP_COLOR:
- if (ctx->Pixel.MapColorFlag == (param ? GL_TRUE : GL_FALSE))
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE;
- break;
- case GL_MAP_STENCIL:
- if (ctx->Pixel.MapStencilFlag == (param ? GL_TRUE : GL_FALSE))
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE;
- break;
- case GL_INDEX_SHIFT:
- if (ctx->Pixel.IndexShift == (GLint) param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.IndexShift = (GLint) param;
- break;
- case GL_INDEX_OFFSET:
- if (ctx->Pixel.IndexOffset == (GLint) param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.IndexOffset = (GLint) param;
- break;
- case GL_RED_SCALE:
- if (ctx->Pixel.RedScale == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.RedScale = param;
- break;
- case GL_RED_BIAS:
- if (ctx->Pixel.RedBias == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.RedBias = param;
- break;
- case GL_GREEN_SCALE:
- if (ctx->Pixel.GreenScale == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.GreenScale = param;
- break;
- case GL_GREEN_BIAS:
- if (ctx->Pixel.GreenBias == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.GreenBias = param;
- break;
- case GL_BLUE_SCALE:
- if (ctx->Pixel.BlueScale == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.BlueScale = param;
- break;
- case GL_BLUE_BIAS:
- if (ctx->Pixel.BlueBias == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.BlueBias = param;
- break;
- case GL_ALPHA_SCALE:
- if (ctx->Pixel.AlphaScale == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.AlphaScale = param;
- break;
- case GL_ALPHA_BIAS:
- if (ctx->Pixel.AlphaBias == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.AlphaBias = param;
- break;
- case GL_DEPTH_SCALE:
- if (ctx->Pixel.DepthScale == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.DepthScale = param;
- break;
- case GL_DEPTH_BIAS:
- if (ctx->Pixel.DepthBias == param)
- return;
- FLUSH_VERTICES(ctx, _NEW_PIXEL);
- ctx->Pixel.DepthBias = param;
- break;
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
- return;
- }
-}
-
-
-static void GLAPIENTRY
-_mesa_PixelTransferi( GLenum pname, GLint param )
-{
- _mesa_PixelTransferf( pname, (GLfloat) param );
-}
-
-
-
-/**********************************************************************/
-/***** State Management *****/
-/**********************************************************************/
-
-/*
- * Return a bitmask of IMAGE_*_BIT flags which to indicate which
- * pixel transfer operations are enabled.
- */
-static void
-update_image_transfer_state(struct gl_context *ctx)
-{
- GLuint mask = 0;
-
- 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)
- mask |= IMAGE_SCALE_BIAS_BIT;
-
- if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset)
- mask |= IMAGE_SHIFT_OFFSET_BIT;
-
- if (ctx->Pixel.MapColorFlag)
- mask |= IMAGE_MAP_COLOR_BIT;
-
- ctx->_ImageTransferState = mask;
-}
-
-
-/**
- * Update mesa pixel transfer derived state.
- */
-void _mesa_update_pixel( struct gl_context *ctx, GLuint new_state )
-{
- if (new_state & _NEW_PIXEL)
- update_image_transfer_state(ctx);
-}
-
-
-void
-_mesa_init_pixel_dispatch(struct _glapi_table *disp)
-{
- SET_GetPixelMapfv(disp, _mesa_GetPixelMapfv);
- SET_GetPixelMapuiv(disp, _mesa_GetPixelMapuiv);
- SET_GetPixelMapusv(disp, _mesa_GetPixelMapusv);
- SET_PixelMapfv(disp, _mesa_PixelMapfv);
- SET_PixelMapuiv(disp, _mesa_PixelMapuiv);
- SET_PixelMapusv(disp, _mesa_PixelMapusv);
- SET_PixelTransferf(disp, _mesa_PixelTransferf);
- SET_PixelTransferi(disp, _mesa_PixelTransferi);
- SET_PixelZoom(disp, _mesa_PixelZoom);
-}
-
-
-#endif /* FEATURE_pixel_transfer */
-
-
-/**********************************************************************/
-/***** Initialization *****/
-/**********************************************************************/
-
-static void
-init_pixelmap(struct gl_pixelmap *map)
-{
- map->Size = 1;
- map->Map[0] = 0.0;
- map->Map8[0] = 0;
-}
-
-
-/**
- * Initialize the context's PIXEL attribute group.
- */
-void
-_mesa_init_pixel( struct gl_context *ctx )
-{
- /* Pixel group */
- ctx->Pixel.RedBias = 0.0;
- ctx->Pixel.RedScale = 1.0;
- ctx->Pixel.GreenBias = 0.0;
- ctx->Pixel.GreenScale = 1.0;
- ctx->Pixel.BlueBias = 0.0;
- ctx->Pixel.BlueScale = 1.0;
- ctx->Pixel.AlphaBias = 0.0;
- ctx->Pixel.AlphaScale = 1.0;
- ctx->Pixel.DepthBias = 0.0;
- ctx->Pixel.DepthScale = 1.0;
- ctx->Pixel.IndexOffset = 0;
- ctx->Pixel.IndexShift = 0;
- ctx->Pixel.ZoomX = 1.0;
- ctx->Pixel.ZoomY = 1.0;
- ctx->Pixel.MapColorFlag = GL_FALSE;
- ctx->Pixel.MapStencilFlag = GL_FALSE;
- init_pixelmap(&ctx->PixelMaps.StoS);
- init_pixelmap(&ctx->PixelMaps.ItoI);
- init_pixelmap(&ctx->PixelMaps.ItoR);
- init_pixelmap(&ctx->PixelMaps.ItoG);
- init_pixelmap(&ctx->PixelMaps.ItoB);
- init_pixelmap(&ctx->PixelMaps.ItoA);
- init_pixelmap(&ctx->PixelMaps.RtoR);
- init_pixelmap(&ctx->PixelMaps.GtoG);
- init_pixelmap(&ctx->PixelMaps.BtoB);
- init_pixelmap(&ctx->PixelMaps.AtoA);
-
- if (ctx->Visual.doubleBufferMode) {
- ctx->Pixel.ReadBuffer = GL_BACK;
- }
- else {
- ctx->Pixel.ReadBuffer = GL_FRONT;
- }
-
- /* Miscellaneous */
- ctx->_ImageTransferState = 0;
-}
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