| 0,0 → 1,692 |
|---|
| /* |
| * Mesa 3-D graphics library |
| * |
| * 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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 "glheader.h" |
| #include "bufferobj.h" |
| #include "colormac.h" |
| #include "context.h" |
| #include "macros.h" |
| #include "pixel.h" |
| #include "pbo.h" |
| #include "mtypes.h" |
| #include "main/dispatch.h" |
| |
| |
| /**********************************************************************/ |
| /***** glPixelZoom *****/ |
| /**********************************************************************/ |
| |
| void GLAPIENTRY |
| _mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor ) |
| { |
| GET_CURRENT_CONTEXT(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; |
| } |
| } |
| } |
| |
| |
| /** |
| * Convenience wrapper for _mesa_validate_pbo_access() for gl[Get]PixelMap(). |
| */ |
| static GLboolean |
| validate_pbo_access(struct gl_context *ctx, |
| struct gl_pixelstore_attrib *pack, GLsizei mapsize, |
| GLenum format, GLenum type, GLsizei clientMemSize, |
| const GLvoid *ptr) |
| { |
| GLboolean ok; |
| |
| /* Note, need to use DefaultPacking and Unpack's buffer object */ |
| _mesa_reference_buffer_object(ctx, |
| &ctx->DefaultPacking.BufferObj, |
| pack->BufferObj); |
| |
| ok = _mesa_validate_pbo_access(1, &ctx->DefaultPacking, mapsize, 1, 1, |
| format, type, clientMemSize, ptr); |
| |
| /* restore */ |
| _mesa_reference_buffer_object(ctx, |
| &ctx->DefaultPacking.BufferObj, |
| ctx->Shared->NullBufferObj); |
| |
| if (!ok) { |
| if (_mesa_is_bufferobj(pack->BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "gl[Get]PixelMap*v(out of bounds PBO access)"); |
| } else { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetnPixelMap*vARB(out of bounds access:" |
| " bufSize (%d) is too small)", clientMemSize); |
| } |
| } |
| return ok; |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_PixelMapfv( GLenum map, GLsizei mapsize, const GLfloat *values ) |
| { |
| GET_CURRENT_CONTEXT(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 (!validate_pbo_access(ctx, &ctx->Unpack, mapsize, GL_INTENSITY, |
| GL_FLOAT, INT_MAX, values)) { |
| return; |
| } |
| |
| values = (const GLfloat *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glPixelMapfv(PBO is mapped)"); |
| } |
| return; |
| } |
| |
| store_pixelmap(ctx, map, mapsize, values); |
| |
| _mesa_unmap_pbo_source(ctx, &ctx->Unpack); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_PixelMapuiv(GLenum map, GLsizei mapsize, const GLuint *values ) |
| { |
| GLfloat fvalues[MAX_PIXEL_MAP_TABLE]; |
| GET_CURRENT_CONTEXT(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 (!validate_pbo_access(ctx, &ctx->Unpack, mapsize, GL_INTENSITY, |
| GL_UNSIGNED_INT, INT_MAX, values)) { |
| return; |
| } |
| |
| values = (const GLuint *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glPixelMapuiv(PBO is mapped)"); |
| } |
| 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] ); |
| } |
| } |
| |
| _mesa_unmap_pbo_source(ctx, &ctx->Unpack); |
| |
| store_pixelmap(ctx, map, mapsize, fvalues); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_PixelMapusv(GLenum map, GLsizei mapsize, const GLushort *values ) |
| { |
| GLfloat fvalues[MAX_PIXEL_MAP_TABLE]; |
| GET_CURRENT_CONTEXT(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 (!validate_pbo_access(ctx, &ctx->Unpack, mapsize, GL_INTENSITY, |
| GL_UNSIGNED_SHORT, INT_MAX, values)) { |
| return; |
| } |
| |
| values = (const GLushort *) _mesa_map_pbo_source(ctx, &ctx->Unpack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glPixelMapusv(PBO is mapped)"); |
| } |
| 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] ); |
| } |
| } |
| |
| _mesa_unmap_pbo_source(ctx, &ctx->Unpack); |
| |
| store_pixelmap(ctx, map, mapsize, fvalues); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetnPixelMapfvARB( GLenum map, GLsizei bufSize, GLfloat *values ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLint mapsize, i; |
| const struct gl_pixelmap *pm; |
| |
| pm = get_pixelmap(ctx, map); |
| if (!pm) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapfv(map)"); |
| return; |
| } |
| |
| mapsize = pm->Size; |
| |
| if (!validate_pbo_access(ctx, &ctx->Pack, mapsize, GL_INTENSITY, |
| GL_FLOAT, bufSize, values)) { |
| return; |
| } |
| |
| values = (GLfloat *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetPixelMapfv(PBO is mapped)"); |
| } |
| 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)); |
| } |
| |
| _mesa_unmap_pbo_dest(ctx, &ctx->Pack); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetPixelMapfv( GLenum map, GLfloat *values ) |
| { |
| _mesa_GetnPixelMapfvARB(map, INT_MAX, values); |
| } |
| |
| void GLAPIENTRY |
| _mesa_GetnPixelMapuivARB( GLenum map, GLsizei bufSize, GLuint *values ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLint mapsize, i; |
| const struct gl_pixelmap *pm; |
| |
| pm = get_pixelmap(ctx, map); |
| if (!pm) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapuiv(map)"); |
| return; |
| } |
| |
| mapsize = pm->Size; |
| |
| if (!validate_pbo_access(ctx, &ctx->Pack, mapsize, GL_INTENSITY, |
| GL_UNSIGNED_INT, bufSize, values)) { |
| return; |
| } |
| |
| values = (GLuint *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetPixelMapuiv(PBO is mapped)"); |
| } |
| 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] ); |
| } |
| } |
| |
| _mesa_unmap_pbo_dest(ctx, &ctx->Pack); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetPixelMapuiv( GLenum map, GLuint *values ) |
| { |
| _mesa_GetnPixelMapuivARB(map, INT_MAX, values); |
| } |
| |
| void GLAPIENTRY |
| _mesa_GetnPixelMapusvARB( GLenum map, GLsizei bufSize, GLushort *values ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| GLint mapsize, i; |
| const struct gl_pixelmap *pm; |
| |
| pm = get_pixelmap(ctx, map); |
| if (!pm) { |
| _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelMapusv(map)"); |
| return; |
| } |
| |
| mapsize = pm->Size; |
| |
| if (!validate_pbo_access(ctx, &ctx->Pack, mapsize, GL_INTENSITY, |
| GL_UNSIGNED_SHORT, bufSize, values)) { |
| return; |
| } |
| |
| values = (GLushort *) _mesa_map_pbo_dest(ctx, &ctx->Pack, values); |
| if (!values) { |
| if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { |
| _mesa_error(ctx, GL_INVALID_OPERATION, |
| "glGetPixelMapusv(PBO is mapped)"); |
| } |
| 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] ); |
| } |
| } |
| |
| _mesa_unmap_pbo_dest(ctx, &ctx->Pack); |
| } |
| |
| |
| void GLAPIENTRY |
| _mesa_GetPixelMapusv( GLenum map, GLushort *values ) |
| { |
| _mesa_GetnPixelMapusvARB(map, INT_MAX, values); |
| } |
| |
| |
| /**********************************************************************/ |
| /***** glPixelTransfer *****/ |
| /**********************************************************************/ |
| |
| |
| /* |
| * Implements glPixelTransfer[fi] whether called immediately or from a |
| * display list. |
| */ |
| void GLAPIENTRY |
| _mesa_PixelTransferf( GLenum pname, GLfloat param ) |
| { |
| GET_CURRENT_CONTEXT(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; |
| } |
| } |
| |
| |
| 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); |
| } |
| |
| |
| /**********************************************************************/ |
| /***** Initialization *****/ |
| /**********************************************************************/ |
| |
| static void |
| init_pixelmap(struct gl_pixelmap *map) |
| { |
| map->Size = 1; |
| map->Map[0] = 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; |
| } |