diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/descrip.mms | 9 | ||||
| -rw-r--r-- | src/mesa/swrast/s_texcombine.c | 1162 | ||||
| -rw-r--r-- | src/mesa/swrast/s_texcombine.h | 36 | ||||
| -rw-r--r-- | src/mesa/swrast/s_texfilter.c (renamed from src/mesa/swrast/s_texture.c) | 1664 | ||||
| -rw-r--r-- | src/mesa/swrast/s_texfilter.h (renamed from src/mesa/swrast/s_texture.h) | 11 |
5 files changed, 1451 insertions, 1431 deletions
diff --git a/src/mesa/swrast/descrip.mms b/src/mesa/swrast/descrip.mms index 7b356277099..9a89f86a69b 100644 --- a/src/mesa/swrast/descrip.mms +++ b/src/mesa/swrast/descrip.mms @@ -22,8 +22,8 @@ SOURCES = s_aaline.c s_aatriangle.c s_accum.c s_alpha.c \ s_bitmap.c s_blend.c s_buffers.c s_context.c s_copypix.c s_depth.c \ s_drawpix.c s_feedback.c s_fog.c s_imaging.c s_lines.c s_logic.c \ s_masking.c s_nvfragprog.c s_pixeltex.c s_points.c s_readpix.c \ - s_span.c s_stencil.c s_texstore.c s_texture.c s_triangle.c s_zoom.c \ - s_atifragshader.c + s_span.c s_stencil.c s_texstore.c s_texcombine.c s_texfilter.c \ + s_triangle.c s_zoom.c s_atifragshader.c OBJECTS = s_aaline.obj,s_aatriangle.obj,s_accum.obj,s_alpha.obj,\ s_bitmap.obj,s_blend.obj,\ @@ -31,7 +31,7 @@ OBJECTS = s_aaline.obj,s_aatriangle.obj,s_accum.obj,s_alpha.obj,\ s_copypix.obj,s_depth.obj,s_drawpix.obj,s_feedback.obj,s_fog.obj,\ s_imaging.obj,s_lines.obj,s_logic.obj,s_masking.obj,s_nvfragprog.obj,\ s_pixeltex.obj,s_points.obj,s_readpix.obj,s_span.obj,s_stencil.obj,\ - s_texstore.obj,s_texture.obj,s_triangle.obj,s_zoom.obj + s_texstore.obj,s_texcombine.obj,s_texfilter.obj,s_triangle.obj,s_zoom.obj ##### RULES ##### @@ -71,6 +71,7 @@ s_readpix.obj : s_readpix.c s_span.obj : s_span.c s_stencil.obj : s_stencil.c s_texstore.obj : s_texstore.c -s_texture.obj : s_texture.c +s_texcombine.obj : s_texcombine.c +s_texfilter.obj : s_texfilter.c s_triangle.obj : s_triangle.c s_zoom.obj : s_zoom.c diff --git a/src/mesa/swrast/s_texcombine.c b/src/mesa/swrast/s_texcombine.c new file mode 100644 index 00000000000..65eccad2e91 --- /dev/null +++ b/src/mesa/swrast/s_texcombine.c @@ -0,0 +1,1162 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 1999-2005 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. + */ + + +#include "glheader.h" +#include "context.h" +#include "colormac.h" +#include "imports.h" +#include "macros.h" +#include "pixel.h" + +#include "s_context.h" +#include "s_texcombine.h" + + +#define PROD(A,B) ( (GLuint)(A) * ((GLuint)(B)+1) ) +#define S_PROD(A,B) ( (GLint)(A) * ((GLint)(B)+1) ) + + +/** + * Do texture application for GL_ARB/EXT_texture_env_combine. + * This function also supports GL_{EXT,ARB}_texture_env_dot3 and + * GL_ATI_texture_env_combine3. Since "classic" texture environments are + * implemented using GL_ARB_texture_env_combine-like state, this same function + * is used for classic texture environment application as well. + * + * \param ctx rendering context + * \param textureUnit the texture unit to apply + * \param n number of fragments to process (span width) + * \param primary_rgba incoming fragment color array + * \param texelBuffer pointer to texel colors for all texture units + * + * \param rgba incoming colors, which get modified here + */ +static void +texture_combine( const GLcontext *ctx, GLuint unit, GLuint n, + CONST GLchan (*primary_rgba)[4], + CONST GLchan *texelBuffer, + GLchan (*rgba)[4] ) +{ + const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]); + const GLchan (*argRGB [3])[4]; + const GLchan (*argA [3])[4]; + const GLuint RGBshift = textureUnit->_CurrentCombine->ScaleShiftRGB; + const GLuint Ashift = textureUnit->_CurrentCombine->ScaleShiftA; +#if CHAN_TYPE == GL_FLOAT + const GLchan RGBmult = (GLfloat) (1 << RGBshift); + const GLchan Amult = (GLfloat) (1 << Ashift); + static const GLchan one[4] = { 1.0, 1.0, 1.0, 1.0 }; + static const GLchan zero[4] = { 0.0, 0.0, 0.0, 0.0 }; +#else + const GLint half = (CHAN_MAX + 1) / 2; + static const GLchan one[4] = { CHAN_MAX, CHAN_MAX, CHAN_MAX, CHAN_MAX }; + static const GLchan zero[4] = { 0, 0, 0, 0 }; +#endif + const GLuint numColorArgs = textureUnit->_CurrentCombine->_NumArgsRGB; + const GLuint numAlphaArgs = textureUnit->_CurrentCombine->_NumArgsA; + GLchan ccolor[3][MAX_WIDTH][4]; + GLuint i, j; + + ASSERT(ctx->Extensions.EXT_texture_env_combine || + ctx->Extensions.ARB_texture_env_combine); + ASSERT(SWRAST_CONTEXT(ctx)->_AnyTextureCombine); + + /* + printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n", + textureUnit->_CurrentCombine->ModeRGB, + textureUnit->_CurrentCombine->ModeA, + textureUnit->_CurrentCombine->SourceRGB[0], + textureUnit->_CurrentCombine->SourceA[0], + textureUnit->_CurrentCombine->SourceRGB[1], + textureUnit->_CurrentCombine->SourceA[1]); + */ + + /* + * Do operand setup for up to 3 operands. Loop over the terms. + */ + for (j = 0; j < numColorArgs; j++) { + const GLenum srcRGB = textureUnit->_CurrentCombine->SourceRGB[j]; + + + switch (srcRGB) { + case GL_TEXTURE: + argRGB[j] = (const GLchan (*)[4]) + (texelBuffer + unit * (n * 4 * sizeof(GLchan))); + break; + case GL_PRIMARY_COLOR: + argRGB[j] = primary_rgba; + break; + case GL_PREVIOUS: + argRGB[j] = (const GLchan (*)[4]) rgba; + break; + case GL_CONSTANT: + { + GLchan (*c)[4] = ccolor[j]; + GLchan red, green, blue, alpha; + UNCLAMPED_FLOAT_TO_CHAN(red, textureUnit->EnvColor[0]); + UNCLAMPED_FLOAT_TO_CHAN(green, textureUnit->EnvColor[1]); + UNCLAMPED_FLOAT_TO_CHAN(blue, textureUnit->EnvColor[2]); + UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); + for (i = 0; i < n; i++) { + c[i][RCOMP] = red; + c[i][GCOMP] = green; + c[i][BCOMP] = blue; + c[i][ACOMP] = alpha; + } + argRGB[j] = (const GLchan (*)[4]) ccolor[j]; + } + break; + /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. + */ + case GL_ZERO: + argRGB[j] = & zero; + break; + case GL_ONE: + argRGB[j] = & one; + break; + default: + /* ARB_texture_env_crossbar source */ + { + const GLuint srcUnit = srcRGB - GL_TEXTURE0; + ASSERT(srcUnit < ctx->Const.MaxTextureUnits); + if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) + return; + argRGB[j] = (const GLchan (*)[4]) + (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); + } + } + + if (textureUnit->_CurrentCombine->OperandRGB[j] != GL_SRC_COLOR) { + const GLchan (*src)[4] = argRGB[j]; + GLchan (*dst)[4] = ccolor[j]; + + /* point to new arg[j] storage */ + argRGB[j] = (const GLchan (*)[4]) ccolor[j]; + + if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_ONE_MINUS_SRC_COLOR) { + for (i = 0; i < n; i++) { + dst[i][RCOMP] = CHAN_MAX - src[i][RCOMP]; + dst[i][GCOMP] = CHAN_MAX - src[i][GCOMP]; + dst[i][BCOMP] = CHAN_MAX - src[i][BCOMP]; + } + } + else if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_SRC_ALPHA) { + for (i = 0; i < n; i++) { + dst[i][RCOMP] = src[i][ACOMP]; + dst[i][GCOMP] = src[i][ACOMP]; + dst[i][BCOMP] = src[i][ACOMP]; + } + } + else { + ASSERT(textureUnit->_CurrentCombine->OperandRGB[j] ==GL_ONE_MINUS_SRC_ALPHA); + for (i = 0; i < n; i++) { + dst[i][RCOMP] = CHAN_MAX - src[i][ACOMP]; + dst[i][GCOMP] = CHAN_MAX - src[i][ACOMP]; + dst[i][BCOMP] = CHAN_MAX - src[i][ACOMP]; + } + } + } + } + + /* + * Set up the argA[i] pointers + */ + for (j = 0; j < numAlphaArgs; j++) { + const GLenum srcA = textureUnit->_CurrentCombine->SourceA[j]; + + switch (srcA) { + case GL_TEXTURE: + argA[j] = (const GLchan (*)[4]) + (texelBuffer + unit * (n * 4 * sizeof(GLchan))); + break; + case GL_PRIMARY_COLOR: + argA[j] = primary_rgba; + break; + case GL_PREVIOUS: + argA[j] = (const GLchan (*)[4]) rgba; + break; + case GL_CONSTANT: + { + GLchan alpha, (*c)[4] = ccolor[j]; + UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); + for (i = 0; i < n; i++) + c[i][ACOMP] = alpha; + argA[j] = (const GLchan (*)[4]) ccolor[j]; + } + break; + /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. + */ + case GL_ZERO: + argA[j] = & zero; + break; + case GL_ONE: + argA[j] = & one; + break; + default: + /* ARB_texture_env_crossbar source */ + { + const GLuint srcUnit = srcA - GL_TEXTURE0; + ASSERT(srcUnit < ctx->Const.MaxTextureUnits); + if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) + return; + argA[j] = (const GLchan (*)[4]) + (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); + } + } + + if (textureUnit->_CurrentCombine->OperandA[j] == GL_ONE_MINUS_SRC_ALPHA) { + const GLchan (*src)[4] = argA[j]; + GLchan (*dst)[4] = ccolor[j]; + argA[j] = (const GLchan (*)[4]) ccolor[j]; + for (i = 0; i < n; i++) { + dst[i][ACOMP] = CHAN_MAX - src[i][ACOMP]; + } + } + } + + /* + * Do the texture combine. + */ + switch (textureUnit->_CurrentCombine->ModeRGB) { + case GL_REPLACE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + if (RGBshift) { + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = arg0[i][RCOMP] * RGBmult; + rgba[i][GCOMP] = arg0[i][GCOMP] * RGBmult; + rgba[i][BCOMP] = arg0[i][BCOMP] * RGBmult; +#else + GLuint r = (GLuint) arg0[i][RCOMP] << RGBshift; + GLuint g = (GLuint) arg0[i][GCOMP] << RGBshift; + GLuint b = (GLuint) arg0[i][BCOMP] << RGBshift; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); +#endif + } + } + else { + for (i = 0; i < n; i++) { + rgba[i][RCOMP] = arg0[i][RCOMP]; + rgba[i][GCOMP] = arg0[i][GCOMP]; + rgba[i][BCOMP] = arg0[i][BCOMP]; + } + } + } + break; + case GL_MODULATE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - RGBshift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * RGBmult; + rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * RGBmult; + rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * RGBmult; +#else + GLuint r = PROD(arg0[i][RCOMP], arg1[i][RCOMP]) >> shift; + GLuint g = PROD(arg0[i][GCOMP], arg1[i][GCOMP]) >> shift; + GLuint b = PROD(arg0[i][BCOMP], arg1[i][BCOMP]) >> shift; + rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); +#endif + } + } + break; + case GL_ADD: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * RGBmult; + rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * RGBmult; + rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * RGBmult; +#else + GLint r = ((GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP]) << RGBshift; + GLint g = ((GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP]) << RGBshift; + GLint b = ((GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP]) << RGBshift; + rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); +#endif + } + } + break; + case GL_ADD_SIGNED: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5) * RGBmult; + rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5) * RGBmult; + rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5) * RGBmult; +#else + GLint r = (GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP] -half; + GLint g = (GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP] -half; + GLint b = (GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP] -half; + r = (r < 0) ? 0 : r << RGBshift; + g = (g < 0) ? 0 : g << RGBshift; + b = (b < 0) ? 0 : b << RGBshift; + rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); +#endif + } + } + break; + case GL_INTERPOLATE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - RGBshift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] + + arg1[i][RCOMP] * (CHAN_MAXF - arg2[i][RCOMP])) * RGBmult; + rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] + + arg1[i][GCOMP] * (CHAN_MAXF - arg2[i][GCOMP])) * RGBmult; + rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] + + arg1[i][BCOMP] * (CHAN_MAXF - arg2[i][BCOMP])) * RGBmult; +#else + GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) + + PROD(arg1[i][RCOMP], CHAN_MAX - arg2[i][RCOMP])) + >> shift; + GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) + + PROD(arg1[i][GCOMP], CHAN_MAX - arg2[i][GCOMP])) + >> shift; + GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) + + PROD(arg1[i][BCOMP], CHAN_MAX - arg2[i][BCOMP])) + >> shift; + rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); +#endif + } + } + break; + case GL_SUBTRACT: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * RGBmult; + rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * RGBmult; + rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * RGBmult; +#else + GLint r = ((GLint) arg0[i][RCOMP] - (GLint) arg1[i][RCOMP]) << RGBshift; + GLint g = ((GLint) arg0[i][GCOMP] - (GLint) arg1[i][GCOMP]) << RGBshift; + GLint b = ((GLint) arg0[i][BCOMP] - (GLint) arg1[i][BCOMP]) << RGBshift; + rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); +#endif + } + } + break; + case GL_DOT3_RGB_EXT: + case GL_DOT3_RGBA_EXT: + { + /* Do not scale the result by 1 2 or 4 */ + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + + (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + + (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) + * 4.0F; + dot = CLAMP(dot, 0.0F, CHAN_MAXF); +#else + GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, + (GLint)arg1[i][RCOMP] - half) + + S_PROD((GLint)arg0[i][GCOMP] - half, + (GLint)arg1[i][GCOMP] - half) + + S_PROD((GLint)arg0[i][BCOMP] - half, + (GLint)arg1[i][BCOMP] - half)) >> 6; + dot = CLAMP(dot, 0, CHAN_MAX); +#endif + rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; + } + } + break; + case GL_DOT3_RGB: + case GL_DOT3_RGBA: + { + /* DO scale the result by 1 2 or 4 */ + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + + (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + + (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) + * 4.0F * RGBmult; + dot = CLAMP(dot, 0.0, CHAN_MAXF); +#else + GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, + (GLint)arg1[i][RCOMP] - half) + + S_PROD((GLint)arg0[i][GCOMP] - half, + (GLint)arg1[i][GCOMP] - half) + + S_PROD((GLint)arg0[i][BCOMP] - half, + (GLint)arg1[i][BCOMP] - half)) >> 6; + dot <<= RGBshift; + dot = CLAMP(dot, 0, CHAN_MAX); +#endif + rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; + } + } + break; + case GL_MODULATE_ADD_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - RGBshift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP]) * RGBmult; + rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP]) * RGBmult; + rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP]) * RGBmult; +#else + GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) + + ((GLuint) arg1[i][RCOMP] << CHAN_BITS)) >> shift; + GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) + + ((GLuint) arg1[i][GCOMP] << CHAN_BITS)) >> shift; + GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) + + ((GLuint) arg1[i][BCOMP] << CHAN_BITS)) >> shift; + rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); +#endif + } + } + break; + case GL_MODULATE_SIGNED_ADD_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - RGBshift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP] - 0.5) * RGBmult; + rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP] - 0.5) * RGBmult; + rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP] - 0.5) * RGBmult; +#else + GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) + + (((GLint) arg1[i][RCOMP] - half) << CHAN_BITS)) + >> shift; + GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) + + (((GLint) arg1[i][GCOMP] - half) << CHAN_BITS)) + >> shift; + GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) + + (((GLint) arg1[i][BCOMP] - half) << CHAN_BITS)) + >> shift; + rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); +#endif + } + } + break; + case GL_MODULATE_SUBTRACT_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - RGBshift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) - arg1[i][RCOMP]) * RGBmult; + rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) - arg1[i][GCOMP]) * RGBmult; + rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) - arg1[i][BCOMP]) * RGBmult; +#else + GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) + - ((GLint) arg1[i][RCOMP] << CHAN_BITS)) + >> shift; + GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) + - ((GLint) arg1[i][GCOMP] << CHAN_BITS)) + >> shift; + GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) + - ((GLint) arg1[i][BCOMP] << CHAN_BITS)) + >> shift; + rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); + rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); + rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); +#endif + } + } + break; + default: + _mesa_problem(ctx, "invalid combine mode"); + } + + switch (textureUnit->_CurrentCombine->ModeA) { + case GL_REPLACE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + if (Ashift) { + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + GLchan a = arg0[i][ACOMP] * Amult; +#else + GLuint a = (GLuint) arg0[i][ACOMP] << Ashift; +#endif + rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); + } + } + else { + for (i = 0; i < n; i++) { + rgba[i][ACOMP] = arg0[i][ACOMP]; + } + } + } + break; + case GL_MODULATE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - Ashift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * Amult; +#else + GLuint a = (PROD(arg0[i][ACOMP], arg1[i][ACOMP]) >> shift); + rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); +#endif + } + } + break; + case GL_ADD: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * Amult; +#else + GLint a = ((GLint) arg0[i][ACOMP] + arg1[i][ACOMP]) << Ashift; + rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); +#endif + } + } + break; + case GL_ADD_SIGNED: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * Amult; +#else + GLint a = (GLint) arg0[i][ACOMP] + (GLint) arg1[i][ACOMP] -half; + a = (a < 0) ? 0 : a << Ashift; + rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); +#endif + } + } + break; + case GL_INTERPOLATE: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - Ashift; +#endif + for (i=0; i<n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] + + arg1[i][ACOMP] * (CHAN_MAXF - arg2[i][ACOMP])) + * Amult; +#else + GLuint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP]) + + PROD(arg1[i][ACOMP], CHAN_MAX - arg2[i][ACOMP])) + >> shift; + rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); +#endif + } + } + break; + case GL_SUBTRACT: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * Amult; +#else + GLint a = ((GLint) arg0[i][ACOMP] - (GLint) arg1[i][ACOMP]) << Ashift; + rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); +#endif + } + } + break; + case GL_MODULATE_ADD_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - Ashift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP]) * Amult; +#else + GLint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP]) + + ((GLuint) arg1[i][ACOMP] << CHAN_BITS)) + >> shift; + rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); +#endif + } + } + break; + case GL_MODULATE_SIGNED_ADD_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - Ashift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP] - 0.5F) * Amult; +#else + GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) + + (((GLint) arg1[i][ACOMP] - half) << CHAN_BITS)) + >> shift; + rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); +#endif + } + } + break; + case GL_MODULATE_SUBTRACT_ATI: + { + const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; + const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; + const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; +#if CHAN_TYPE != GL_FLOAT + const GLint shift = CHAN_BITS - Ashift; +#endif + for (i = 0; i < n; i++) { +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - arg1[i][ACOMP]) * Amult; +#else + GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) + - ((GLint) arg1[i][ACOMP] << CHAN_BITS)) + >> shift; + rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); +#endif + } + } + break; + default: + _mesa_problem(ctx, "invalid combine mode"); + } + + /* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining. + * This is kind of a kludge. It would have been better if the spec + * were written such that the GL_COMBINE_ALPHA value could be set to + * GL_DOT3. + */ + if (textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT || + textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) { + for (i = 0; i < n; i++) { + rgba[i][ACOMP] = rgba[i][RCOMP]; + } + } +} +#undef PROD + + +/** + * Apply a conventional OpenGL texture env mode (REPLACE, ADD, BLEND, + * MODULATE, or DECAL) to an array of fragments. + * Input: textureUnit - pointer to texture unit to apply + * format - base internal texture format + * n - number of fragments + * primary_rgba - primary colors (may alias rgba for single texture) + * texels - array of texel colors + * InOut: rgba - incoming fragment colors modified by texel colors + * according to the texture environment mode. + */ +static void +texture_apply( const GLcontext *ctx, + const struct gl_texture_unit *texUnit, + GLuint n, + CONST GLchan primary_rgba[][4], CONST GLchan texel[][4], + GLchan rgba[][4] ) +{ + GLint baseLevel; + GLuint i; + GLint Rc, Gc, Bc, Ac; + GLenum format; + (void) primary_rgba; + + ASSERT(texUnit); + ASSERT(texUnit->_Current); + + baseLevel = texUnit->_Current->BaseLevel; + ASSERT(texUnit->_Current->Image[0][baseLevel]); + + format = texUnit->_Current->Image[0][baseLevel]->Format; + + if (format == GL_COLOR_INDEX || format == GL_YCBCR_MESA) { + format = GL_RGBA; /* a bit of a hack */ + } + else if (format == GL_DEPTH_COMPONENT) { + format = texUnit->_Current->DepthMode; + } + + switch (texUnit->EnvMode) { + case GL_REPLACE: + switch (format) { + case GL_ALPHA: + for (i=0;i<n;i++) { + /* Cv = Cf */ + /* Av = At */ + rgba[i][ACOMP] = texel[i][ACOMP]; + } + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) { + /* Cv = Lt */ + GLchan Lt = texel[i][RCOMP]; + rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt; + /* Av = Af */ + } + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + GLchan Lt = texel[i][RCOMP]; + /* Cv = Lt */ + rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt; + /* Av = At */ + rgba[i][ACOMP] = texel[i][ACOMP]; + } + break; + case GL_INTENSITY: + for (i=0;i<n;i++) { + /* Cv = It */ + GLchan It = texel[i][RCOMP]; + rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = It; + /* Av = It */ + rgba[i][ACOMP] = It; + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + /* Cv = Ct */ + rgba[i][RCOMP] = texel[i][RCOMP]; + rgba[i][GCOMP] = texel[i][GCOMP]; + rgba[i][BCOMP] = texel[i][BCOMP]; + /* Av = Af */ + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + /* Cv = Ct */ + rgba[i][RCOMP] = texel[i][RCOMP]; + rgba[i][GCOMP] = texel[i][GCOMP]; + rgba[i][BCOMP] = texel[i][BCOMP]; + /* Av = At */ + rgba[i][ACOMP] = texel[i][ACOMP]; + } + break; + default: + _mesa_problem(ctx, "Bad format (GL_REPLACE) in texture_apply"); + return; + } + break; + + case GL_MODULATE: + switch (format) { + case GL_ALPHA: + for (i=0;i<n;i++) { + /* Cv = Cf */ + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); + } + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) { + /* Cv = LtCf */ + GLchan Lt = texel[i][RCOMP]; + rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt ); + rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt ); + rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt ); + /* Av = Af */ + } + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + /* Cv = CfLt */ + GLchan Lt = texel[i][RCOMP]; + rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt ); + rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt ); + rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt ); + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); + } + break; + case GL_INTENSITY: + for (i=0;i<n;i++) { + /* Cv = CfIt */ + GLchan It = texel[i][RCOMP]; + rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], It ); + rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], It ); + rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], It ); + /* Av = AfIt */ + rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], It ); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + /* Cv = CfCt */ + rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] ); + rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] ); + rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] ); + /* Av = Af */ + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + /* Cv = CfCt */ + rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] ); + rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] ); + rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] ); + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); + } + break; + default: + _mesa_problem(ctx, "Bad format (GL_MODULATE) in texture_apply"); + return; + } + break; + + case GL_DECAL: + switch (format) { + case GL_ALPHA: + case GL_LUMINANCE: + case GL_LUMINANCE_ALPHA: + case GL_INTENSITY: + /* undefined */ + break; + case GL_RGB: + for (i=0;i<n;i++) { + /* Cv = Ct */ + rgba[i][RCOMP] = texel[i][RCOMP]; + rgba[i][GCOMP] = texel[i][GCOMP]; + rgba[i][BCOMP] = texel[i][BCOMP]; + /* Av = Af */ + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + /* Cv = Cf(1-At) + CtAt */ + GLint t = texel[i][ACOMP], s = CHAN_MAX - t; + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(texel[i][RCOMP],t); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(texel[i][GCOMP],t); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(texel[i][BCOMP],t); + /* Av = Af */ + } + break; + default: + _mesa_problem(ctx, "Bad format (GL_DECAL) in texture_apply"); + return; + } + break; + + case GL_BLEND: + Rc = (GLint) (texUnit->EnvColor[0] * CHAN_MAXF); + Gc = (GLint) (texUnit->EnvColor[1] * CHAN_MAXF); + Bc = (GLint) (texUnit->EnvColor[2] * CHAN_MAXF); + Ac = (GLint) (texUnit->EnvColor[3] * CHAN_MAXF); + switch (format) { + case GL_ALPHA: + for (i=0;i<n;i++) { + /* Cv = Cf */ + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); + } + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) { + /* Cv = Cf(1-Lt) + CcLt */ + GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt; + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt); + /* Av = Af */ + } + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + /* Cv = Cf(1-Lt) + CcLt */ + GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt; + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt); + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]); + } + break; + case GL_INTENSITY: + for (i=0;i<n;i++) { + /* Cv = Cf(1-It) + CcIt */ + GLchan It = texel[i][RCOMP], s = CHAN_MAX - It; + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, It); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, It); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, It); + /* Av = Af(1-It) + Ac*It */ + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], s) + CHAN_PRODUCT(Ac, It); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + /* Cv = Cf(1-Ct) + CcCt */ + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]); + /* Av = Af */ + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + /* Cv = Cf(1-Ct) + CcCt */ + rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]); + rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]); + rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]); + /* Av = AfAt */ + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]); + } + break; + default: + _mesa_problem(ctx, "Bad format (GL_BLEND) in texture_apply"); + return; + } + break; + + /* XXX don't clamp results if GLchan is float??? */ + + case GL_ADD: /* GL_EXT_texture_add_env */ + switch (format) { + case GL_ALPHA: + for (i=0;i<n;i++) { + /* Rv = Rf */ + /* Gv = Gf */ + /* Bv = Bf */ + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); + } + break; + case GL_LUMINANCE: + for (i=0;i<n;i++) { + GLuint Lt = texel[i][RCOMP]; + GLuint r = rgba[i][RCOMP] + Lt; + GLuint g = rgba[i][GCOMP] + Lt; + GLuint b = rgba[i][BCOMP] + Lt; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); + /* Av = Af */ + } + break; + case GL_LUMINANCE_ALPHA: + for (i=0;i<n;i++) { + GLuint Lt = texel[i][RCOMP]; + GLuint r = rgba[i][RCOMP] + Lt; + GLuint g = rgba[i][GCOMP] + Lt; + GLuint b = rgba[i][BCOMP] + Lt; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); + } + break; + case GL_INTENSITY: + for (i=0;i<n;i++) { + GLchan It = texel[i][RCOMP]; + GLuint r = rgba[i][RCOMP] + It; + GLuint g = rgba[i][GCOMP] + It; + GLuint b = rgba[i][BCOMP] + It; + GLuint a = rgba[i][ACOMP] + It; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); + rgba[i][ACOMP] = MIN2(a, CHAN_MAX); + } + break; + case GL_RGB: + for (i=0;i<n;i++) { + GLuint r = rgba[i][RCOMP] + texel[i][RCOMP]; + GLuint g = rgba[i][GCOMP] + texel[i][GCOMP]; + GLuint b = rgba[i][BCOMP] + texel[i][BCOMP]; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); + /* Av = Af */ + } + break; + case GL_RGBA: + for (i=0;i<n;i++) { + GLuint r = rgba[i][RCOMP] + texel[i][RCOMP]; + GLuint g = rgba[i][GCOMP] + texel[i][GCOMP]; + GLuint b = rgba[i][BCOMP] + texel[i][BCOMP]; + rgba[i][RCOMP] = MIN2(r, CHAN_MAX); + rgba[i][GCOMP] = MIN2(g, CHAN_MAX); + rgba[i][BCOMP] = MIN2(b, CHAN_MAX); + rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); + } + break; + default: + _mesa_problem(ctx, "Bad format (GL_ADD) in texture_apply"); + return; + } + break; + + default: + _mesa_problem(ctx, "Bad env mode in texture_apply"); + return; + } +} + + + +/** + * Apply texture mapping to a span of fragments. + */ +void +_swrast_texture_span( GLcontext *ctx, struct sw_span *span ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + GLchan primary_rgba[MAX_WIDTH][4]; + GLuint unit; + + ASSERT(span->end < MAX_WIDTH); + ASSERT(span->arrayMask & SPAN_TEXTURE); + + /* + * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR) + */ + if (swrast->_AnyTextureCombine) + MEMCPY(primary_rgba, span->array->rgba, 4 * span->end * sizeof(GLchan)); + + /* + * Must do all texture sampling before combining in order to + * accomodate GL_ARB_texture_env_crossbar. + */ + for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { + if (ctx->Texture.Unit[unit]._ReallyEnabled) { + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + const struct gl_texture_object *curObj = texUnit->_Current; + GLfloat *lambda = span->array->lambda[unit]; + GLchan (*texels)[4] = (GLchan (*)[4]) + (swrast->TexelBuffer + unit * (span->end * 4 * sizeof(GLchan))); + + /* adjust texture lod (lambda) */ + if (span->arrayMask & SPAN_LAMBDA) { + if (texUnit->LodBias + curObj->LodBias != 0.0F) { + /* apply LOD bias, but don't clamp yet */ + const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias, + -ctx->Const.MaxTextureLodBias, + ctx->Const.MaxTextureLodBias); + GLuint i; + for (i = 0; i < span->end; i++) { + lambda[i] += bias; + } + } + + if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) { + /* apply LOD clamping to lambda */ + const GLfloat min = curObj->MinLod; + const GLfloat max = curObj->MaxLod; + GLuint i; + for (i = 0; i < span->end; i++) { + GLfloat l = lambda[i]; + lambda[i] = CLAMP(l, min, max); + } + } + } + + /* Sample the texture (span->end fragments) */ + swrast->TextureSample[unit]( ctx, unit, texUnit->_Current, span->end, + (const GLfloat (*)[4]) span->array->texcoords[unit], + lambda, texels ); + + /* GL_SGI_texture_color_table */ + if (texUnit->ColorTableEnabled) { + _mesa_lookup_rgba_chan(&texUnit->ColorTable, span->end, texels); + } + } + } + + /* + * OK, now apply the texture (aka texture combine/blend). + * We modify the span->color.rgba values. + */ + for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { + if (ctx->Texture.Unit[unit]._ReallyEnabled) { + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + if (texUnit->_CurrentCombine != &texUnit->_EnvMode ) { + texture_combine( ctx, unit, span->end, + (CONST GLchan (*)[4]) primary_rgba, + swrast->TexelBuffer, + span->array->rgba ); + } + else { + /* conventional texture blend */ + const GLchan (*texels)[4] = (const GLchan (*)[4]) + (swrast->TexelBuffer + unit * + (span->end * 4 * sizeof(GLchan))); + texture_apply( ctx, texUnit, span->end, + (CONST GLchan (*)[4]) primary_rgba, texels, + span->array->rgba ); + } + } + } +} diff --git a/src/mesa/swrast/s_texcombine.h b/src/mesa/swrast/s_texcombine.h new file mode 100644 index 00000000000..eca967c5404 --- /dev/null +++ b/src/mesa/swrast/s_texcombine.h @@ -0,0 +1,36 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 1999-2005 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. + */ + + +#ifndef S_TEXCOMBINE_H +#define S_TEXCOMBINE_H + + +#include "mtypes.h" +#include "swrast.h" + +extern void +_swrast_texture_span( GLcontext *ctx, struct sw_span *span ); + +#endif diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texfilter.c index 04a4996d9fc..7435690db03 100644 --- a/src/mesa/swrast/s_texture.c +++ b/src/mesa/swrast/s_texfilter.c @@ -26,14 +26,11 @@ #include "glheader.h" #include "context.h" #include "colormac.h" -#include "macros.h" #include "imports.h" -#include "pixel.h" #include "texformat.h" -#include "teximage.h" #include "s_context.h" -#include "s_texture.h" +#include "s_texfilter.h" /** @@ -122,6 +119,63 @@ ilerp_3d(GLint ia, GLint ib, GLint ic, } +/** + * Do linear interpolation of colors. + */ +static INLINE void +lerp_rgba(GLchan result[4], GLfloat t, const GLchan a[4], const GLchan b[4]) +{ +#if CHAN_TYPE == GL_FLOAT + result[0] = LERP(t, a[0], b[0]); + result[1] = LERP(t, a[1], b[1]); + result[2] = LERP(t, a[2], b[2]); + result[3] = LERP(t, a[3], b[3]); +#elif CHAN_TYPE == GL_UNSIGNED_SHORT + result[0] = (GLchan) (LERP(t, a[0], b[0]) + 0.5); + result[1] = (GLchan) (LERP(t, a[1], b[1]) + 0.5); + result[2] = (GLchan) (LERP(t, a[2], b[2]) + 0.5); + result[3] = (GLchan) (LERP(t, a[3], b[3]) + 0.5); +#else + /* fixed point interpolants in [0, ILERP_SCALE] */ + const GLint it = IROUND_POS(t * ILERP_SCALE); + ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); + result[0] = ILERP(it, a[0], b[0]); + result[1] = ILERP(it, a[1], b[1]); + result[2] = ILERP(it, a[2], b[2]); + result[3] = ILERP(it, a[3], b[3]); +#endif +} + + +/** + * Do bilinear interpolation of colors. + */ +static INLINE void +lerp_rgba_2d(GLchan result[4], GLfloat a, GLfloat b, + const GLchan t00[4], const GLchan t10[4], + const GLchan t01[4], const GLchan t11[4]) +{ +#if CHAN_TYPE == GL_FLOAT + result[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]); + result[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]); + result[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]); + result[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]); +#elif CHAN_TYPE == GL_UNSIGNED_SHORT + result[0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5); + result[1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5); + result[2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5); + result[3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5); +#else + const GLint ia = IROUND_POS(a * ILERP_SCALE); + const GLint ib = IROUND_POS(b * ILERP_SCALE); + ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); + result[0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]); + result[1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]); + result[2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]); + result[3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]); +#endif +} + /** * Compute the remainder of a divided by b, but be careful with @@ -149,7 +203,8 @@ repeat_remainder(GLint a, GLint b) */ #define COMPUTE_LINEAR_TEXEL_LOCATIONS(wrapMode, S, U, SIZE, I0, I1) \ { \ - if (wrapMode == GL_REPEAT) { \ + switch (wrapMode) { \ + case GL_REPEAT: \ U = S * SIZE - 0.5F; \ if (tObj->_IsPowerOfTwo) { \ I0 = IFLOOR(U) & (SIZE - 1); \ @@ -159,8 +214,8 @@ repeat_remainder(GLint a, GLint b) I0 = repeat_remainder(IFLOOR(U), SIZE); \ I1 = repeat_remainder(I0 + 1, SIZE); \ } \ - } \ - else if (wrapMode == GL_CLAMP_TO_EDGE) { \ + break; \ + case GL_CLAMP_TO_EDGE: \ if (S <= 0.0F) \ U = 0.0F; \ else if (S >= 1.0F) \ @@ -174,35 +229,39 @@ repeat_remainder(GLint a, GLint b) I0 = 0; \ if (I1 >= (GLint) SIZE) \ I1 = SIZE - 1; \ - } \ - else if (wrapMode == GL_CLAMP_TO_BORDER) { \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S <= min) \ - U = min * SIZE; \ - else if (S >= max) \ - U = max * SIZE; \ - else \ - U = S * SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - } \ - else if (wrapMode == GL_MIRRORED_REPEAT) { \ - const GLint flr = IFLOOR(S); \ - if (flr & 1) \ - U = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ - else \ - U = S - (GLfloat) flr; /* flr is even */ \ - U = (U * SIZE) - 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - if (I0 < 0) \ - I0 = 0; \ - if (I1 >= (GLint) SIZE) \ - I1 = SIZE - 1; \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_EXT) { \ + break; \ + case GL_CLAMP_TO_BORDER: \ + { \ + const GLfloat min = -1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + if (S <= min) \ + U = min * SIZE; \ + else if (S >= max) \ + U = max * SIZE; \ + else \ + U = S * SIZE; \ + U -= 0.5F; \ + I0 = IFLOOR(U); \ + I1 = I0 + 1; \ + } \ + break; \ + case GL_MIRRORED_REPEAT: \ + { \ + const GLint flr = IFLOOR(S); \ + if (flr & 1) \ + U = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ + else \ + U = S - (GLfloat) flr; /* flr is even */ \ + U = (U * SIZE) - 0.5F; \ + I0 = IFLOOR(U); \ + I1 = I0 + 1; \ + if (I0 < 0) \ + I0 = 0; \ + if (I1 >= (GLint) SIZE) \ + I1 = SIZE - 1; \ + } \ + break; \ + case GL_MIRROR_CLAMP_EXT: \ U = (GLfloat) fabs(S); \ if (U >= 1.0F) \ U = (GLfloat) SIZE; \ @@ -211,8 +270,8 @@ repeat_remainder(GLint a, GLint b) U -= 0.5F; \ I0 = IFLOOR(U); \ I1 = I0 + 1; \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_EDGE_EXT) { \ + break; \ + case GL_MIRROR_CLAMP_TO_EDGE_EXT: \ U = (GLfloat) fabs(S); \ if (U >= 1.0F) \ U = (GLfloat) SIZE; \ @@ -225,23 +284,24 @@ repeat_remainder(GLint a, GLint b) I0 = 0; \ if (I1 >= (GLint) SIZE) \ I1 = SIZE - 1; \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_BORDER_EXT) { \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - U = (GLfloat) fabs(S); \ - if (U <= min) \ - U = min * SIZE; \ - else if (U >= max) \ - U = max * SIZE; \ - else \ - U *= SIZE; \ - U -= 0.5F; \ - I0 = IFLOOR(U); \ - I1 = I0 + 1; \ - } \ - else { \ - ASSERT(wrapMode == GL_CLAMP); \ + break; \ + case GL_MIRROR_CLAMP_TO_BORDER_EXT: \ + { \ + const GLfloat min = -1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + U = (GLfloat) fabs(S); \ + if (U <= min) \ + U = min * SIZE; \ + else if (U >= max) \ + U = max * SIZE; \ + else \ + U *= SIZE; \ + U -= 0.5F; \ + I0 = IFLOOR(U); \ + I1 = I0 + 1; \ + } \ + break; \ + case GL_CLAMP: \ if (S <= 0.0F) \ U = 0.0F; \ else if (S >= 1.0F) \ @@ -251,6 +311,9 @@ repeat_remainder(GLint a, GLint b) U -= 0.5F; \ I0 = IFLOOR(U); \ I1 = I0 + 1; \ + break; \ + default: \ + _mesa_problem(ctx, "Bad wrap mode"); \ } \ } @@ -260,7 +323,8 @@ repeat_remainder(GLint a, GLint b) */ #define COMPUTE_NEAREST_TEXEL_LOCATION(wrapMode, S, SIZE, I) \ { \ - if (wrapMode == GL_REPEAT) { \ + switch (wrapMode) { \ + case GL_REPEAT: \ /* s limited to [0,1) */ \ /* i limited to [0,size-1] */ \ I = IFLOOR(S * SIZE); \ @@ -268,86 +332,97 @@ repeat_remainder(GLint a, GLint b) I &= (SIZE - 1); \ else \ I = repeat_remainder(I, SIZE); \ - } \ - else if (wrapMode == GL_CLAMP_TO_EDGE) { \ - /* s limited to [min,max] */ \ - /* i limited to [0, size-1] */ \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S < min) \ - I = 0; \ - else if (S > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(S * SIZE); \ - } \ - else if (wrapMode == GL_CLAMP_TO_BORDER) { \ - /* s limited to [min,max] */ \ - /* i limited to [-1, size] */ \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - if (S <= min) \ - I = -1; \ - else if (S >= max) \ - I = SIZE; \ - else \ - I = IFLOOR(S * SIZE); \ - } \ - else if (wrapMode == GL_MIRRORED_REPEAT) { \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - const GLint flr = IFLOOR(S); \ - GLfloat u; \ - if (flr & 1) \ - u = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ - else \ - u = S - (GLfloat) flr; /* flr is even */ \ - if (u < min) \ - I = 0; \ - else if (u > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_EXT) { \ - /* s limited to [0,1] */ \ - /* i limited to [0,size-1] */ \ - const GLfloat u = (GLfloat) fabs(S); \ - if (u <= 0.0F) \ - I = 0; \ - else if (u >= 1.0F) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_EDGE_EXT) { \ - /* s limited to [min,max] */ \ - /* i limited to [0, size-1] */ \ - const GLfloat min = 1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - const GLfloat u = (GLfloat) fabs(S); \ - if (u < min) \ - I = 0; \ - else if (u > max) \ - I = SIZE - 1; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else if (wrapMode == GL_MIRROR_CLAMP_TO_BORDER_EXT) { \ - /* s limited to [min,max] */ \ - /* i limited to [0, size-1] */ \ - const GLfloat min = -1.0F / (2.0F * SIZE); \ - const GLfloat max = 1.0F - min; \ - const GLfloat u = (GLfloat) fabs(S); \ - if (u < min) \ - I = -1; \ - else if (u > max) \ - I = SIZE; \ - else \ - I = IFLOOR(u * SIZE); \ - } \ - else { \ - ASSERT(wrapMode == GL_CLAMP); \ + break; \ + case GL_CLAMP_TO_EDGE: \ + { \ + /* s limited to [min,max] */ \ + /* i limited to [0, size-1] */ \ + const GLfloat min = 1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + if (S < min) \ + I = 0; \ + else if (S > max) \ + I = SIZE - 1; \ + else \ + I = IFLOOR(S * SIZE); \ + } \ + break; \ + case GL_CLAMP_TO_BORDER: \ + { \ + /* s limited to [min,max] */ \ + /* i limited to [-1, size] */ \ + const GLfloat min = -1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + if (S <= min) \ + I = -1; \ + else if (S >= max) \ + I = SIZE; \ + else \ + I = IFLOOR(S * SIZE); \ + } \ + break; \ + case GL_MIRRORED_REPEAT: \ + { \ + const GLfloat min = 1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + const GLint flr = IFLOOR(S); \ + GLfloat u; \ + if (flr & 1) \ + u = 1.0F - (S - (GLfloat) flr); /* flr is odd */ \ + else \ + u = S - (GLfloat) flr; /* flr is even */ \ + if (u < min) \ + I = 0; \ + else if (u > max) \ + I = SIZE - 1; \ + else \ + I = IFLOOR(u * SIZE); \ + } \ + break; \ + case GL_MIRROR_CLAMP_EXT: \ + { \ + /* s limited to [0,1] */ \ + /* i limited to [0,size-1] */ \ + const GLfloat u = (GLfloat) fabs(S); \ + if (u <= 0.0F) \ + I = 0; \ + else if (u >= 1.0F) \ + I = SIZE - 1; \ + else \ + I = IFLOOR(u * SIZE); \ + } \ + break; \ + case GL_MIRROR_CLAMP_TO_EDGE_EXT: \ + { \ + /* s limited to [min,max] */ \ + /* i limited to [0, size-1] */ \ + const GLfloat min = 1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + const GLfloat u = (GLfloat) fabs(S); \ + if (u < min) \ + I = 0; \ + else if (u > max) \ + I = SIZE - 1; \ + else \ + I = IFLOOR(u * SIZE); \ + } \ + break; \ + case GL_MIRROR_CLAMP_TO_BORDER_EXT: \ + { \ + /* s limited to [min,max] */ \ + /* i limited to [0, size-1] */ \ + const GLfloat min = -1.0F / (2.0F * SIZE); \ + const GLfloat max = 1.0F - min; \ + const GLfloat u = (GLfloat) fabs(S); \ + if (u < min) \ + I = -1; \ + else if (u > max) \ + I = SIZE; \ + else \ + I = IFLOOR(u * SIZE); \ + } \ + break; \ + case GL_CLAMP: \ /* s limited to [0,1] */ \ /* i limited to [0,size-1] */ \ if (S <= 0.0F) \ @@ -356,6 +431,9 @@ repeat_remainder(GLint a, GLint b) I = SIZE - 1; \ else \ I = IFLOOR(S * SIZE); \ + break; \ + default: \ + _mesa_problem(ctx, "Bad wrap mode"); \ } \ } @@ -404,8 +482,8 @@ repeat_remainder(GLint a, GLint b) /* * Note, the FRAC macro has to work perfectly. Otherwise you'll sometimes - * see 1-pixel bands of improperly weighted linear-sampled texels. The - * tests/texwrap.c demo is a good test. + * see 1-pixel bands of improperly weighted linear-filtered textures. + * The tests/texwrap.c demo is a good test. * Also note, FRAC(x) doesn't truly return the fractional part of x for x < 0. * Instead, if x < 0 then FRAC(x) = 1 - true_frac(x). */ @@ -598,28 +676,7 @@ sample_1d_linear(GLcontext *ctx, img->FetchTexelc(img, i1, 0, 0, t1); } - /* do linear interpolation of texel colors */ -#if CHAN_TYPE == GL_FLOAT - rgba[0] = LERP(a, t0[0], t1[0]); - rgba[1] = LERP(a, t0[1], t1[1]); - rgba[2] = LERP(a, t0[2], t1[2]); - rgba[3] = LERP(a, t0[3], t1[3]); -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (LERP(a, t0[0], t1[0]) + 0.5); - rgba[1] = (GLchan) (LERP(a, t0[1], t1[1]) + 0.5); - rgba[2] = (GLchan) (LERP(a, t0[2], t1[2]) + 0.5); - rgba[3] = (GLchan) (LERP(a, t0[3], t1[3]) + 0.5); -#else - ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); - { - /* fixed point interpolants in [0, ILERP_SCALE] */ - const GLint ia = IROUND_POS(a * ILERP_SCALE); - rgba[0] = ILERP(ia, t0[0], t1[0]); - rgba[1] = ILERP(ia, t0[1], t1[1]); - rgba[2] = ILERP(ia, t0[2], t1[2]); - rgba[3] = ILERP(ia, t0[3], t1[3]); - } -#endif + lerp_rgba(rgba, a, t0, t1); } } @@ -656,17 +713,6 @@ sample_1d_linear_mipmap_nearest(GLcontext *ctx, } - -/* - * This is really just needed in order to prevent warnings with some compilers. - */ -#if CHAN_TYPE == GL_FLOAT -#define CHAN_CAST -#else -#define CHAN_CAST (GLchan) (GLint) -#endif - - static void sample_1d_nearest_mipmap_linear(GLcontext *ctx, const struct gl_texture_object *tObj, @@ -687,10 +733,7 @@ sample_1d_nearest_mipmap_linear(GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_1d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_1d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -717,10 +760,7 @@ sample_1d_linear_mipmap_linear(GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_1d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_1d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -912,10 +952,6 @@ sample_2d_linear(GLcontext *ctx, { const GLfloat a = FRAC(u); const GLfloat b = FRAC(v); -#if CHAN_TYPE == GL_UNSIGNED_BYTE - const GLint ia = IROUND_POS(a * ILERP_SCALE); - const GLint ib = IROUND_POS(b * ILERP_SCALE); -#endif GLchan t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */ /* fetch four texel colors */ @@ -944,30 +980,14 @@ sample_2d_linear(GLcontext *ctx, img->FetchTexelc(img, i1, j1, 0, t11); } - /* do bilinear interpolation of texel colors */ -#if CHAN_TYPE == GL_FLOAT - rgba[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]); - rgba[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]); - rgba[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]); - rgba[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]); -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5); - rgba[1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5); - rgba[2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5); - rgba[3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5); -#else - ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); - rgba[0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]); - rgba[1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]); - rgba[2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]); - rgba[3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]); -#endif + lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11); } } /* * As above, but we know WRAP_S == REPEAT and WRAP_T == REPEAT. + * We don't have to worry about the texture border. */ static INLINE void sample_2d_linear_repeat(GLcontext *ctx, @@ -995,10 +1015,6 @@ sample_2d_linear_repeat(GLcontext *ctx, { const GLfloat a = FRAC(u); const GLfloat b = FRAC(v); -#if CHAN_TYPE == GL_UNSIGNED_BYTE - const GLint ia = IROUND_POS(a * ILERP_SCALE); - const GLint ib = IROUND_POS(b * ILERP_SCALE); -#endif GLchan t00[4], t10[4], t01[4], t11[4]; /* sampled texel colors */ img->FetchTexelc(img, i0, j0, 0, t00); @@ -1006,24 +1022,7 @@ sample_2d_linear_repeat(GLcontext *ctx, img->FetchTexelc(img, i0, j1, 0, t01); img->FetchTexelc(img, i1, j1, 0, t11); - /* do bilinear interpolation of texel colors */ -#if CHAN_TYPE == GL_FLOAT - rgba[0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]); - rgba[1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]); - rgba[2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]); - rgba[3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]); -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5); - rgba[1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5); - rgba[2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5); - rgba[3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5); -#else - ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); - rgba[0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]); - rgba[1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]); - rgba[2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]); - rgba[3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]); -#endif + lerp_rgba_2d(rgba, a, b, t00, t10, t01, t11); } } @@ -1082,10 +1081,7 @@ sample_2d_nearest_mipmap_linear(GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_2d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_2d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -1113,10 +1109,7 @@ sample_2d_linear_mipmap_linear( GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_2d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_2d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -1145,10 +1138,7 @@ sample_2d_linear_mipmap_linear_repeat( GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_2d_linear_repeat(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -1181,8 +1171,7 @@ sample_linear_2d( GLcontext *ctx, GLuint texUnit, struct gl_texture_image *image = tObj->Image[0][tObj->BaseLevel]; (void) texUnit; (void) lambda; - if (tObj->WrapS == GL_REPEAT && tObj->WrapT == GL_REPEAT - && image->Border == 0) { + if (tObj->WrapS == GL_REPEAT && tObj->WrapT == GL_REPEAT) { for (i=0;i<n;i++) { sample_2d_linear_repeat(ctx, tObj, image, texcoords[i], rgba[i]); } @@ -1646,10 +1635,7 @@ sample_3d_nearest_mipmap_linear(GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_3d_nearest(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_3d_nearest(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -1675,10 +1661,7 @@ sample_3d_linear_mipmap_linear(GLcontext *ctx, const GLfloat f = FRAC(lambda[i]); sample_3d_linear(ctx, tObj, tObj->Image[0][level ], texcoord[i], t0); sample_3d_linear(ctx, tObj, tObj->Image[0][level+1], texcoord[i], t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -1796,7 +1779,7 @@ sample_lambda_3d( GLcontext *ctx, GLuint texUnit, /* Texture Cube Map Sampling Functions */ /**********************************************************************/ -/* +/** * Choose one of six sides of a texture cube map given the texture * coord (rx,ry,rz). Return pointer to corresponding array of texture * images. @@ -1805,7 +1788,7 @@ static const struct gl_texture_image ** choose_cube_face(const struct gl_texture_object *texObj, const GLfloat texcoord[4], GLfloat newCoord[4]) { -/* + /* major axis direction target sc tc ma ---------- ------------------------------- --- --- --- @@ -1815,23 +1798,23 @@ choose_cube_face(const struct gl_texture_object *texObj, -ry TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT +rx -rz ry +rz TEXTURE_CUBE_MAP_POSITIVE_Z_EXT +rx -ry rz -rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz -*/ + */ const GLfloat rx = texcoord[0]; const GLfloat ry = texcoord[1]; const GLfloat rz = texcoord[2]; - const struct gl_texture_image **imgArray; - const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz); + const GLfloat arx = FABSF(rx), ary = FABSF(ry), arz = FABSF(rz); + GLuint face; GLfloat sc, tc, ma; if (arx > ary && arx > arz) { if (rx >= 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_X]; + face = FACE_POS_X; sc = -rz; tc = -ry; ma = arx; } else { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_X]; + face = FACE_NEG_X; sc = rz; tc = -ry; ma = arx; @@ -1839,13 +1822,13 @@ choose_cube_face(const struct gl_texture_object *texObj, } else if (ary > arx && ary > arz) { if (ry >= 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_Y]; + face = FACE_POS_Y; sc = rx; tc = rz; ma = ary; } else { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_Y]; + face = FACE_NEG_Y; sc = rx; tc = -rz; ma = ary; @@ -1853,13 +1836,13 @@ choose_cube_face(const struct gl_texture_object *texObj, } else { if (rz > 0.0F) { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_POS_Z]; + face = FACE_POS_Z; sc = rx; tc = -ry; ma = arz; } else { - imgArray = (const struct gl_texture_image **) texObj->Image[FACE_NEG_Z]; + face = FACE_NEG_Z; sc = -rx; tc = -ry; ma = arz; @@ -1868,7 +1851,7 @@ choose_cube_face(const struct gl_texture_object *texObj, newCoord[0] = ( sc / ma + 1.0F ) * 0.5F; newCoord[1] = ( tc / ma + 1.0F ) * 0.5F; - return imgArray; + return (const struct gl_texture_image **) texObj->Image[face]; } @@ -1974,10 +1957,7 @@ sample_cube_nearest_mipmap_linear(GLcontext *ctx, GLuint texUnit, const GLfloat f = FRAC(lambda[i]); sample_2d_nearest(ctx, tObj, images[level ], newCoord, t0); sample_2d_nearest(ctx, tObj, images[level+1], newCoord, t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -2007,10 +1987,7 @@ sample_cube_linear_mipmap_linear(GLcontext *ctx, GLuint texUnit, const GLfloat f = FRAC(lambda[i]); sample_2d_linear(ctx, tObj, images[level ], newCoord, t0); sample_2d_linear(ctx, tObj, images[level+1], newCoord, t1); - rgba[i][RCOMP] = CHAN_CAST ((1.0F-f) * t0[RCOMP] + f * t1[RCOMP]); - rgba[i][GCOMP] = CHAN_CAST ((1.0F-f) * t0[GCOMP] + f * t1[GCOMP]); - rgba[i][BCOMP] = CHAN_CAST ((1.0F-f) * t0[BCOMP] + f * t1[BCOMP]); - rgba[i][ACOMP] = CHAN_CAST ((1.0F-f) * t0[ACOMP] + f * t1[ACOMP]); + lerp_rgba(rgba[i], f, t0, t1); } } } @@ -2177,9 +2154,6 @@ sample_linear_rect(GLcontext *ctx, GLuint texUnit, GLchan t00[4], t01[4], t10[4], t11[4]; GLfloat a, b; GLuint useBorderColor = 0; -#if CHAN_TYPE == GL_UNSIGNED_BYTE - GLint ia, ib; -#endif /* NOTE: we DO NOT use [0, 1] texture coordinates! */ if (tObj->WrapS == GL_CLAMP) { @@ -2256,29 +2230,8 @@ sample_linear_rect(GLcontext *ctx, GLuint texUnit, /* compute interpolants */ a = FRAC(fcol); b = FRAC(frow); -#if CHAN_TYPE == GL_UNSIGNED_BYTE - ia = IROUND_POS(a * ILERP_SCALE); - ib = IROUND_POS(b * ILERP_SCALE); -#endif - /* do bilinear interpolation of texel colors */ -#if CHAN_TYPE == GL_FLOAT - rgba[i][0] = lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]); - rgba[i][1] = lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]); - rgba[i][2] = lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]); - rgba[i][3] = lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]); -#elif CHAN_TYPE == GL_UNSIGNED_SHORT - rgba[i][0] = (GLchan) (lerp_2d(a, b, t00[0], t10[0], t01[0], t11[0]) + 0.5); - rgba[i][1] = (GLchan) (lerp_2d(a, b, t00[1], t10[1], t01[1], t11[1]) + 0.5); - rgba[i][2] = (GLchan) (lerp_2d(a, b, t00[2], t10[2], t01[2], t11[2]) + 0.5); - rgba[i][3] = (GLchan) (lerp_2d(a, b, t00[3], t10[3], t01[3], t11[3]) + 0.5); -#else - ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); - rgba[i][0] = ilerp_2d(ia, ib, t00[0], t10[0], t01[0], t11[0]); - rgba[i][1] = ilerp_2d(ia, ib, t00[1], t10[1], t01[1], t11[1]); - rgba[i][2] = ilerp_2d(ia, ib, t00[2], t10[2], t01[2], t11[2]); - rgba[i][3] = ilerp_2d(ia, ib, t00[3], t10[3], t01[3], t11[3]); -#endif + lerp_rgba_2d(rgba[i], a, b, t00, t10, t01, t11); } } @@ -2728,7 +2681,7 @@ null_sample_func( GLcontext *ctx, GLuint texUnit, /** - * Setup the texture sampling function for this texture object. + * Choose the texture sampling function for the given texture object. */ texture_sample_func _swrast_choose_texture_sample_func( GLcontext *ctx, @@ -2827,1132 +2780,3 @@ _swrast_choose_texture_sample_func( GLcontext *ctx, } } } - - -/* Fixed-point products */ -#define PROD(A,B) ( (GLuint)(A) * ((GLuint)(B)+1) ) -#define S_PROD(A,B) ( (GLint)(A) * ((GLint)(B)+1) ) - - -/** - * Do texture application for GL_ARB/EXT_texture_env_combine. - * This function also supports GL_{EXT,ARB}_texture_env_dot3 and - * GL_ATI_texture_env_combine3. Since "classic" texture environments are - * implemented using GL_ARB_texture_env_combine-like state, this same function - * is used for classic texture environment application as well. - * - * \param ctx rendering context - * \param textureUnit the texture unit to apply - * \param n number of fragments to process (span width) - * \param primary_rgba incoming fragment color array - * \param texelBuffer pointer to texel colors for all texture units - * - * \param rgba incoming colors, which get modified here - */ -static void -texture_combine( const GLcontext *ctx, GLuint unit, GLuint n, - CONST GLchan (*primary_rgba)[4], - CONST GLchan *texelBuffer, - GLchan (*rgba)[4] ) -{ - const struct gl_texture_unit *textureUnit = &(ctx->Texture.Unit[unit]); - const GLchan (*argRGB [3])[4]; - const GLchan (*argA [3])[4]; - const GLuint RGBshift = textureUnit->_CurrentCombine->ScaleShiftRGB; - const GLuint Ashift = textureUnit->_CurrentCombine->ScaleShiftA; -#if CHAN_TYPE == GL_FLOAT - const GLchan RGBmult = (GLfloat) (1 << RGBshift); - const GLchan Amult = (GLfloat) (1 << Ashift); - static const GLchan one[4] = { 1.0, 1.0, 1.0, 1.0 }; - static const GLchan zero[4] = { 0.0, 0.0, 0.0, 0.0 }; -#else - const GLint half = (CHAN_MAX + 1) / 2; - static const GLchan one[4] = { CHAN_MAX, CHAN_MAX, CHAN_MAX, CHAN_MAX }; - static const GLchan zero[4] = { 0, 0, 0, 0 }; -#endif - const GLuint numColorArgs = textureUnit->_CurrentCombine->_NumArgsRGB; - const GLuint numAlphaArgs = textureUnit->_CurrentCombine->_NumArgsA; - GLchan ccolor[3][MAX_WIDTH][4]; - GLuint i, j; - - ASSERT(ctx->Extensions.EXT_texture_env_combine || - ctx->Extensions.ARB_texture_env_combine); - ASSERT(SWRAST_CONTEXT(ctx)->_AnyTextureCombine); - - /* - printf("modeRGB 0x%x modeA 0x%x srcRGB1 0x%x srcA1 0x%x srcRGB2 0x%x srcA2 0x%x\n", - textureUnit->_CurrentCombine->ModeRGB, - textureUnit->_CurrentCombine->ModeA, - textureUnit->_CurrentCombine->SourceRGB[0], - textureUnit->_CurrentCombine->SourceA[0], - textureUnit->_CurrentCombine->SourceRGB[1], - textureUnit->_CurrentCombine->SourceA[1]); - */ - - /* - * Do operand setup for up to 3 operands. Loop over the terms. - */ - for (j = 0; j < numColorArgs; j++) { - const GLenum srcRGB = textureUnit->_CurrentCombine->SourceRGB[j]; - - - switch (srcRGB) { - case GL_TEXTURE: - argRGB[j] = (const GLchan (*)[4]) - (texelBuffer + unit * (n * 4 * sizeof(GLchan))); - break; - case GL_PRIMARY_COLOR: - argRGB[j] = primary_rgba; - break; - case GL_PREVIOUS: - argRGB[j] = (const GLchan (*)[4]) rgba; - break; - case GL_CONSTANT: - { - GLchan (*c)[4] = ccolor[j]; - GLchan red, green, blue, alpha; - UNCLAMPED_FLOAT_TO_CHAN(red, textureUnit->EnvColor[0]); - UNCLAMPED_FLOAT_TO_CHAN(green, textureUnit->EnvColor[1]); - UNCLAMPED_FLOAT_TO_CHAN(blue, textureUnit->EnvColor[2]); - UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); - for (i = 0; i < n; i++) { - c[i][RCOMP] = red; - c[i][GCOMP] = green; - c[i][BCOMP] = blue; - c[i][ACOMP] = alpha; - } - argRGB[j] = (const GLchan (*)[4]) ccolor[j]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - argRGB[j] = & zero; - break; - case GL_ONE: - argRGB[j] = & one; - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcRGB - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argRGB[j] = (const GLchan (*)[4]) - (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); - } - } - - if (textureUnit->_CurrentCombine->OperandRGB[j] != GL_SRC_COLOR) { - const GLchan (*src)[4] = argRGB[j]; - GLchan (*dst)[4] = ccolor[j]; - - /* point to new arg[j] storage */ - argRGB[j] = (const GLchan (*)[4]) ccolor[j]; - - if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_ONE_MINUS_SRC_COLOR) { - for (i = 0; i < n; i++) { - dst[i][RCOMP] = CHAN_MAX - src[i][RCOMP]; - dst[i][GCOMP] = CHAN_MAX - src[i][GCOMP]; - dst[i][BCOMP] = CHAN_MAX - src[i][BCOMP]; - } - } - else if (textureUnit->_CurrentCombine->OperandRGB[j] == GL_SRC_ALPHA) { - for (i = 0; i < n; i++) { - dst[i][RCOMP] = src[i][ACOMP]; - dst[i][GCOMP] = src[i][ACOMP]; - dst[i][BCOMP] = src[i][ACOMP]; - } - } - else { - ASSERT(textureUnit->_CurrentCombine->OperandRGB[j] ==GL_ONE_MINUS_SRC_ALPHA); - for (i = 0; i < n; i++) { - dst[i][RCOMP] = CHAN_MAX - src[i][ACOMP]; - dst[i][GCOMP] = CHAN_MAX - src[i][ACOMP]; - dst[i][BCOMP] = CHAN_MAX - src[i][ACOMP]; - } - } - } - } - - /* - * Set up the argA[i] pointers - */ - for (j = 0; j < numAlphaArgs; j++) { - const GLenum srcA = textureUnit->_CurrentCombine->SourceA[j]; - - switch (srcA) { - case GL_TEXTURE: - argA[j] = (const GLchan (*)[4]) - (texelBuffer + unit * (n * 4 * sizeof(GLchan))); - break; - case GL_PRIMARY_COLOR: - argA[j] = primary_rgba; - break; - case GL_PREVIOUS: - argA[j] = (const GLchan (*)[4]) rgba; - break; - case GL_CONSTANT: - { - GLchan alpha, (*c)[4] = ccolor[j]; - UNCLAMPED_FLOAT_TO_CHAN(alpha, textureUnit->EnvColor[3]); - for (i = 0; i < n; i++) - c[i][ACOMP] = alpha; - argA[j] = (const GLchan (*)[4]) ccolor[j]; - } - break; - /* GL_ATI_texture_env_combine3 allows GL_ZERO & GL_ONE as sources. - */ - case GL_ZERO: - argA[j] = & zero; - break; - case GL_ONE: - argA[j] = & one; - break; - default: - /* ARB_texture_env_crossbar source */ - { - const GLuint srcUnit = srcA - GL_TEXTURE0; - ASSERT(srcUnit < ctx->Const.MaxTextureUnits); - if (!ctx->Texture.Unit[srcUnit]._ReallyEnabled) - return; - argA[j] = (const GLchan (*)[4]) - (texelBuffer + srcUnit * (n * 4 * sizeof(GLchan))); - } - } - - if (textureUnit->_CurrentCombine->OperandA[j] == GL_ONE_MINUS_SRC_ALPHA) { - const GLchan (*src)[4] = argA[j]; - GLchan (*dst)[4] = ccolor[j]; - argA[j] = (const GLchan (*)[4]) ccolor[j]; - for (i = 0; i < n; i++) { - dst[i][ACOMP] = CHAN_MAX - src[i][ACOMP]; - } - } - } - - /* - * Do the texture combine. - */ - switch (textureUnit->_CurrentCombine->ModeRGB) { - case GL_REPLACE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - if (RGBshift) { - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = arg0[i][RCOMP] * RGBmult; - rgba[i][GCOMP] = arg0[i][GCOMP] * RGBmult; - rgba[i][BCOMP] = arg0[i][BCOMP] * RGBmult; -#else - GLuint r = (GLuint) arg0[i][RCOMP] << RGBshift; - GLuint g = (GLuint) arg0[i][GCOMP] << RGBshift; - GLuint b = (GLuint) arg0[i][BCOMP] << RGBshift; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); -#endif - } - } - else { - for (i = 0; i < n; i++) { - rgba[i][RCOMP] = arg0[i][RCOMP]; - rgba[i][GCOMP] = arg0[i][GCOMP]; - rgba[i][BCOMP] = arg0[i][BCOMP]; - } - } - } - break; - case GL_MODULATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = arg0[i][RCOMP] * arg1[i][RCOMP] * RGBmult; - rgba[i][GCOMP] = arg0[i][GCOMP] * arg1[i][GCOMP] * RGBmult; - rgba[i][BCOMP] = arg0[i][BCOMP] * arg1[i][BCOMP] * RGBmult; -#else - GLuint r = PROD(arg0[i][RCOMP], arg1[i][RCOMP]) >> shift; - GLuint g = PROD(arg0[i][GCOMP], arg1[i][GCOMP]) >> shift; - GLuint b = PROD(arg0[i][BCOMP], arg1[i][BCOMP]) >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_ADD: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP]) * RGBmult; -#else - GLint r = ((GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP]) << RGBshift; - GLint g = ((GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP]) << RGBshift; - GLint b = ((GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP]) << RGBshift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_ADD_SIGNED: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] + arg1[i][RCOMP] - 0.5) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] + arg1[i][GCOMP] - 0.5) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] + arg1[i][BCOMP] - 0.5) * RGBmult; -#else - GLint r = (GLint) arg0[i][RCOMP] + (GLint) arg1[i][RCOMP] -half; - GLint g = (GLint) arg0[i][GCOMP] + (GLint) arg1[i][GCOMP] -half; - GLint b = (GLint) arg0[i][BCOMP] + (GLint) arg1[i][BCOMP] -half; - r = (r < 0) ? 0 : r << RGBshift; - g = (g < 0) ? 0 : g << RGBshift; - b = (b < 0) ? 0 : b << RGBshift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_INTERPOLATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] * arg2[i][RCOMP] + - arg1[i][RCOMP] * (CHAN_MAXF - arg2[i][RCOMP])) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] * arg2[i][GCOMP] + - arg1[i][GCOMP] * (CHAN_MAXF - arg2[i][GCOMP])) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] * arg2[i][BCOMP] + - arg1[i][BCOMP] * (CHAN_MAXF - arg2[i][BCOMP])) * RGBmult; -#else - GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + PROD(arg1[i][RCOMP], CHAN_MAX - arg2[i][RCOMP])) - >> shift; - GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + PROD(arg1[i][GCOMP], CHAN_MAX - arg2[i][GCOMP])) - >> shift; - GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + PROD(arg1[i][BCOMP], CHAN_MAX - arg2[i][BCOMP])) - >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_SUBTRACT: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = (arg0[i][RCOMP] - arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = (arg0[i][GCOMP] - arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = (arg0[i][BCOMP] - arg1[i][BCOMP]) * RGBmult; -#else - GLint r = ((GLint) arg0[i][RCOMP] - (GLint) arg1[i][RCOMP]) << RGBshift; - GLint g = ((GLint) arg0[i][GCOMP] - (GLint) arg1[i][GCOMP]) << RGBshift; - GLint b = ((GLint) arg0[i][BCOMP] - (GLint) arg1[i][BCOMP]) << RGBshift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - case GL_DOT3_RGB_EXT: - case GL_DOT3_RGBA_EXT: - { - /* Do not scale the result by 1 2 or 4 */ - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + - (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + - (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) - * 4.0F; - dot = CLAMP(dot, 0.0F, CHAN_MAXF); -#else - GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, - (GLint)arg1[i][RCOMP] - half) + - S_PROD((GLint)arg0[i][GCOMP] - half, - (GLint)arg1[i][GCOMP] - half) + - S_PROD((GLint)arg0[i][BCOMP] - half, - (GLint)arg1[i][BCOMP] - half)) >> 6; - dot = CLAMP(dot, 0, CHAN_MAX); -#endif - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; - } - } - break; - case GL_DOT3_RGB: - case GL_DOT3_RGBA: - { - /* DO scale the result by 1 2 or 4 */ - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan dot = ((arg0[i][RCOMP]-0.5F) * (arg1[i][RCOMP]-0.5F) + - (arg0[i][GCOMP]-0.5F) * (arg1[i][GCOMP]-0.5F) + - (arg0[i][BCOMP]-0.5F) * (arg1[i][BCOMP]-0.5F)) - * 4.0F * RGBmult; - dot = CLAMP(dot, 0.0, CHAN_MAXF); -#else - GLint dot = (S_PROD((GLint)arg0[i][RCOMP] - half, - (GLint)arg1[i][RCOMP] - half) + - S_PROD((GLint)arg0[i][GCOMP] - half, - (GLint)arg1[i][GCOMP] - half) + - S_PROD((GLint)arg0[i][BCOMP] - half, - (GLint)arg1[i][BCOMP] - half)) >> 6; - dot <<= RGBshift; - dot = CLAMP(dot, 0, CHAN_MAX); -#endif - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = (GLchan) dot; - } - } - break; - case GL_MODULATE_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP]) * RGBmult; -#else - GLuint r = (PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + ((GLuint) arg1[i][RCOMP] << CHAN_BITS)) >> shift; - GLuint g = (PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + ((GLuint) arg1[i][GCOMP] << CHAN_BITS)) >> shift; - GLuint b = (PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + ((GLuint) arg1[i][BCOMP] << CHAN_BITS)) >> shift; - rgba[i][RCOMP] = (GLchan) MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) MIN2(b, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) + arg1[i][RCOMP] - 0.5) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) + arg1[i][GCOMP] - 0.5) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) + arg1[i][BCOMP] - 0.5) * RGBmult; -#else - GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - + (((GLint) arg1[i][RCOMP] - half) << CHAN_BITS)) - >> shift; - GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - + (((GLint) arg1[i][GCOMP] - half) << CHAN_BITS)) - >> shift; - GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - + (((GLint) arg1[i][BCOMP] - half) << CHAN_BITS)) - >> shift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SUBTRACT_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argRGB[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argRGB[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argRGB[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - RGBshift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][RCOMP] = ((arg0[i][RCOMP] * arg2[i][RCOMP]) - arg1[i][RCOMP]) * RGBmult; - rgba[i][GCOMP] = ((arg0[i][GCOMP] * arg2[i][GCOMP]) - arg1[i][GCOMP]) * RGBmult; - rgba[i][BCOMP] = ((arg0[i][BCOMP] * arg2[i][BCOMP]) - arg1[i][BCOMP]) * RGBmult; -#else - GLint r = (S_PROD(arg0[i][RCOMP], arg2[i][RCOMP]) - - ((GLint) arg1[i][RCOMP] << CHAN_BITS)) - >> shift; - GLint g = (S_PROD(arg0[i][GCOMP], arg2[i][GCOMP]) - - ((GLint) arg1[i][GCOMP] << CHAN_BITS)) - >> shift; - GLint b = (S_PROD(arg0[i][BCOMP], arg2[i][BCOMP]) - - ((GLint) arg1[i][BCOMP] << CHAN_BITS)) - >> shift; - rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); - rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); - rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); -#endif - } - } - break; - default: - _mesa_problem(ctx, "invalid combine mode"); - } - - switch (textureUnit->_CurrentCombine->ModeA) { - case GL_REPLACE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - if (Ashift) { - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - GLchan a = arg0[i][ACOMP] * Amult; -#else - GLuint a = (GLuint) arg0[i][ACOMP] << Ashift; -#endif - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); - } - } - else { - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = arg0[i][ACOMP]; - } - } - } - break; - case GL_MODULATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = arg0[i][ACOMP] * arg1[i][ACOMP] * Amult; -#else - GLuint a = (PROD(arg0[i][ACOMP], arg1[i][ACOMP]) >> shift); - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_ADD: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP]) * Amult; -#else - GLint a = ((GLint) arg0[i][ACOMP] + arg1[i][ACOMP]) << Ashift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_ADD_SIGNED: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] + arg1[i][ACOMP] - 0.5F) * Amult; -#else - GLint a = (GLint) arg0[i][ACOMP] + (GLint) arg1[i][ACOMP] -half; - a = (a < 0) ? 0 : a << Ashift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_INTERPOLATE: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i=0; i<n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] * arg2[i][ACOMP] + - arg1[i][ACOMP] * (CHAN_MAXF - arg2[i][ACOMP])) - * Amult; -#else - GLuint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - + PROD(arg1[i][ACOMP], CHAN_MAX - arg2[i][ACOMP])) - >> shift; - rgba[i][ACOMP] = (GLchan) MIN2(a, CHAN_MAX); -#endif - } - } - break; - case GL_SUBTRACT: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = (arg0[i][ACOMP] - arg1[i][ACOMP]) * Amult; -#else - GLint a = ((GLint) arg0[i][ACOMP] - (GLint) arg1[i][ACOMP]) << Ashift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP]) * Amult; -#else - GLint a = (PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - + ((GLuint) arg1[i][ACOMP] << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SIGNED_ADD_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) + arg1[i][ACOMP] - 0.5F) * Amult; -#else - GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - + (((GLint) arg1[i][ACOMP] - half) << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - case GL_MODULATE_SUBTRACT_ATI: - { - const GLchan (*arg0)[4] = (const GLchan (*)[4]) argA[0]; - const GLchan (*arg1)[4] = (const GLchan (*)[4]) argA[1]; - const GLchan (*arg2)[4] = (const GLchan (*)[4]) argA[2]; -#if CHAN_TYPE != GL_FLOAT - const GLint shift = CHAN_BITS - Ashift; -#endif - for (i = 0; i < n; i++) { -#if CHAN_TYPE == GL_FLOAT - rgba[i][ACOMP] = ((arg0[i][ACOMP] * arg2[i][ACOMP]) - arg1[i][ACOMP]) * Amult; -#else - GLint a = (S_PROD(arg0[i][ACOMP], arg2[i][ACOMP]) - - ((GLint) arg1[i][ACOMP] << CHAN_BITS)) - >> shift; - rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); -#endif - } - } - break; - default: - _mesa_problem(ctx, "invalid combine mode"); - } - - /* Fix the alpha component for GL_DOT3_RGBA_EXT/ARB combining. - * This is kind of a kludge. It would have been better if the spec - * were written such that the GL_COMBINE_ALPHA value could be set to - * GL_DOT3. - */ - if (textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT || - textureUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) { - for (i = 0; i < n; i++) { - rgba[i][ACOMP] = rgba[i][RCOMP]; - } - } -} -#undef PROD - - -/** - * Apply a conventional OpenGL texture env mode (REPLACE, ADD, BLEND, - * MODULATE, or DECAL) to an array of fragments. - * Input: textureUnit - pointer to texture unit to apply - * format - base internal texture format - * n - number of fragments - * primary_rgba - primary colors (may alias rgba for single texture) - * texels - array of texel colors - * InOut: rgba - incoming fragment colors modified by texel colors - * according to the texture environment mode. - */ -static void -texture_apply( const GLcontext *ctx, - const struct gl_texture_unit *texUnit, - GLuint n, - CONST GLchan primary_rgba[][4], CONST GLchan texel[][4], - GLchan rgba[][4] ) -{ - GLint baseLevel; - GLuint i; - GLint Rc, Gc, Bc, Ac; - GLenum format; - (void) primary_rgba; - - ASSERT(texUnit); - ASSERT(texUnit->_Current); - - baseLevel = texUnit->_Current->BaseLevel; - ASSERT(texUnit->_Current->Image[0][baseLevel]); - - format = texUnit->_Current->Image[0][baseLevel]->Format; - - if (format == GL_COLOR_INDEX || format == GL_YCBCR_MESA) { - format = GL_RGBA; /* a bit of a hack */ - } - else if (format == GL_DEPTH_COMPONENT) { - format = texUnit->_Current->DepthMode; - } - - switch (texUnit->EnvMode) { - case GL_REPLACE: - switch (format) { - case GL_ALPHA: - for (i=0;i<n;i++) { - /* Cv = Cf */ - /* Av = At */ - rgba[i][ACOMP] = texel[i][ACOMP]; - } - break; - case GL_LUMINANCE: - for (i=0;i<n;i++) { - /* Cv = Lt */ - GLchan Lt = texel[i][RCOMP]; - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt; - /* Av = Af */ - } - break; - case GL_LUMINANCE_ALPHA: - for (i=0;i<n;i++) { - GLchan Lt = texel[i][RCOMP]; - /* Cv = Lt */ - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = Lt; - /* Av = At */ - rgba[i][ACOMP] = texel[i][ACOMP]; - } - break; - case GL_INTENSITY: - for (i=0;i<n;i++) { - /* Cv = It */ - GLchan It = texel[i][RCOMP]; - rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = It; - /* Av = It */ - rgba[i][ACOMP] = It; - } - break; - case GL_RGB: - for (i=0;i<n;i++) { - /* Cv = Ct */ - rgba[i][RCOMP] = texel[i][RCOMP]; - rgba[i][GCOMP] = texel[i][GCOMP]; - rgba[i][BCOMP] = texel[i][BCOMP]; - /* Av = Af */ - } - break; - case GL_RGBA: - for (i=0;i<n;i++) { - /* Cv = Ct */ - rgba[i][RCOMP] = texel[i][RCOMP]; - rgba[i][GCOMP] = texel[i][GCOMP]; - rgba[i][BCOMP] = texel[i][BCOMP]; - /* Av = At */ - rgba[i][ACOMP] = texel[i][ACOMP]; - } - break; - default: - _mesa_problem(ctx, "Bad format (GL_REPLACE) in texture_apply"); - return; - } - break; - - case GL_MODULATE: - switch (format) { - case GL_ALPHA: - for (i=0;i<n;i++) { - /* Cv = Cf */ - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); - } - break; - case GL_LUMINANCE: - for (i=0;i<n;i++) { - /* Cv = LtCf */ - GLchan Lt = texel[i][RCOMP]; - rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt ); - rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt ); - rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt ); - /* Av = Af */ - } - break; - case GL_LUMINANCE_ALPHA: - for (i=0;i<n;i++) { - /* Cv = CfLt */ - GLchan Lt = texel[i][RCOMP]; - rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], Lt ); - rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], Lt ); - rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], Lt ); - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); - } - break; - case GL_INTENSITY: - for (i=0;i<n;i++) { - /* Cv = CfIt */ - GLchan It = texel[i][RCOMP]; - rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], It ); - rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], It ); - rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], It ); - /* Av = AfIt */ - rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], It ); - } - break; - case GL_RGB: - for (i=0;i<n;i++) { - /* Cv = CfCt */ - rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] ); - rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] ); - rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] ); - /* Av = Af */ - } - break; - case GL_RGBA: - for (i=0;i<n;i++) { - /* Cv = CfCt */ - rgba[i][RCOMP] = CHAN_PRODUCT( rgba[i][RCOMP], texel[i][RCOMP] ); - rgba[i][GCOMP] = CHAN_PRODUCT( rgba[i][GCOMP], texel[i][GCOMP] ); - rgba[i][BCOMP] = CHAN_PRODUCT( rgba[i][BCOMP], texel[i][BCOMP] ); - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT( rgba[i][ACOMP], texel[i][ACOMP] ); - } - break; - default: - _mesa_problem(ctx, "Bad format (GL_MODULATE) in texture_apply"); - return; - } - break; - - case GL_DECAL: - switch (format) { - case GL_ALPHA: - case GL_LUMINANCE: - case GL_LUMINANCE_ALPHA: - case GL_INTENSITY: - /* undefined */ - break; - case GL_RGB: - for (i=0;i<n;i++) { - /* Cv = Ct */ - rgba[i][RCOMP] = texel[i][RCOMP]; - rgba[i][GCOMP] = texel[i][GCOMP]; - rgba[i][BCOMP] = texel[i][BCOMP]; - /* Av = Af */ - } - break; - case GL_RGBA: - for (i=0;i<n;i++) { - /* Cv = Cf(1-At) + CtAt */ - GLint t = texel[i][ACOMP], s = CHAN_MAX - t; - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(texel[i][RCOMP],t); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(texel[i][GCOMP],t); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(texel[i][BCOMP],t); - /* Av = Af */ - } - break; - default: - _mesa_problem(ctx, "Bad format (GL_DECAL) in texture_apply"); - return; - } - break; - - case GL_BLEND: - Rc = (GLint) (texUnit->EnvColor[0] * CHAN_MAXF); - Gc = (GLint) (texUnit->EnvColor[1] * CHAN_MAXF); - Bc = (GLint) (texUnit->EnvColor[2] * CHAN_MAXF); - Ac = (GLint) (texUnit->EnvColor[3] * CHAN_MAXF); - switch (format) { - case GL_ALPHA: - for (i=0;i<n;i++) { - /* Cv = Cf */ - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); - } - break; - case GL_LUMINANCE: - for (i=0;i<n;i++) { - /* Cv = Cf(1-Lt) + CcLt */ - GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt; - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt); - /* Av = Af */ - } - break; - case GL_LUMINANCE_ALPHA: - for (i=0;i<n;i++) { - /* Cv = Cf(1-Lt) + CcLt */ - GLchan Lt = texel[i][RCOMP], s = CHAN_MAX - Lt; - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, Lt); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, Lt); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, Lt); - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]); - } - break; - case GL_INTENSITY: - for (i=0;i<n;i++) { - /* Cv = Cf(1-It) + CcIt */ - GLchan It = texel[i][RCOMP], s = CHAN_MAX - It; - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], s) + CHAN_PRODUCT(Rc, It); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], s) + CHAN_PRODUCT(Gc, It); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], s) + CHAN_PRODUCT(Bc, It); - /* Av = Af(1-It) + Ac*It */ - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], s) + CHAN_PRODUCT(Ac, It); - } - break; - case GL_RGB: - for (i=0;i<n;i++) { - /* Cv = Cf(1-Ct) + CcCt */ - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]); - /* Av = Af */ - } - break; - case GL_RGBA: - for (i=0;i<n;i++) { - /* Cv = Cf(1-Ct) + CcCt */ - rgba[i][RCOMP] = CHAN_PRODUCT(rgba[i][RCOMP], (CHAN_MAX-texel[i][RCOMP])) + CHAN_PRODUCT(Rc,texel[i][RCOMP]); - rgba[i][GCOMP] = CHAN_PRODUCT(rgba[i][GCOMP], (CHAN_MAX-texel[i][GCOMP])) + CHAN_PRODUCT(Gc,texel[i][GCOMP]); - rgba[i][BCOMP] = CHAN_PRODUCT(rgba[i][BCOMP], (CHAN_MAX-texel[i][BCOMP])) + CHAN_PRODUCT(Bc,texel[i][BCOMP]); - /* Av = AfAt */ - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP],texel[i][ACOMP]); - } - break; - default: - _mesa_problem(ctx, "Bad format (GL_BLEND) in texture_apply"); - return; - } - break; - - /* XXX don't clamp results if GLchan is float??? */ - - case GL_ADD: /* GL_EXT_texture_add_env */ - switch (format) { - case GL_ALPHA: - for (i=0;i<n;i++) { - /* Rv = Rf */ - /* Gv = Gf */ - /* Bv = Bf */ - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); - } - break; - case GL_LUMINANCE: - for (i=0;i<n;i++) { - GLuint Lt = texel[i][RCOMP]; - GLuint r = rgba[i][RCOMP] + Lt; - GLuint g = rgba[i][GCOMP] + Lt; - GLuint b = rgba[i][BCOMP] + Lt; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); - /* Av = Af */ - } - break; - case GL_LUMINANCE_ALPHA: - for (i=0;i<n;i++) { - GLuint Lt = texel[i][RCOMP]; - GLuint r = rgba[i][RCOMP] + Lt; - GLuint g = rgba[i][GCOMP] + Lt; - GLuint b = rgba[i][BCOMP] + Lt; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); - } - break; - case GL_INTENSITY: - for (i=0;i<n;i++) { - GLchan It = texel[i][RCOMP]; - GLuint r = rgba[i][RCOMP] + It; - GLuint g = rgba[i][GCOMP] + It; - GLuint b = rgba[i][BCOMP] + It; - GLuint a = rgba[i][ACOMP] + It; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); - rgba[i][ACOMP] = MIN2(a, CHAN_MAX); - } - break; - case GL_RGB: - for (i=0;i<n;i++) { - GLuint r = rgba[i][RCOMP] + texel[i][RCOMP]; - GLuint g = rgba[i][GCOMP] + texel[i][GCOMP]; - GLuint b = rgba[i][BCOMP] + texel[i][BCOMP]; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); - /* Av = Af */ - } - break; - case GL_RGBA: - for (i=0;i<n;i++) { - GLuint r = rgba[i][RCOMP] + texel[i][RCOMP]; - GLuint g = rgba[i][GCOMP] + texel[i][GCOMP]; - GLuint b = rgba[i][BCOMP] + texel[i][BCOMP]; - rgba[i][RCOMP] = MIN2(r, CHAN_MAX); - rgba[i][GCOMP] = MIN2(g, CHAN_MAX); - rgba[i][BCOMP] = MIN2(b, CHAN_MAX); - rgba[i][ACOMP] = CHAN_PRODUCT(rgba[i][ACOMP], texel[i][ACOMP]); - } - break; - default: - _mesa_problem(ctx, "Bad format (GL_ADD) in texture_apply"); - return; - } - break; - - default: - _mesa_problem(ctx, "Bad env mode in texture_apply"); - return; - } -} - - - -/** - * Apply texture mapping to a span of fragments. - */ -void -_swrast_texture_span( GLcontext *ctx, struct sw_span *span ) -{ - SWcontext *swrast = SWRAST_CONTEXT(ctx); - GLchan primary_rgba[MAX_WIDTH][4]; - GLuint unit; - - ASSERT(span->end < MAX_WIDTH); - ASSERT(span->arrayMask & SPAN_TEXTURE); - - /* - * Save copy of the incoming fragment colors (the GL_PRIMARY_COLOR) - */ - if (swrast->_AnyTextureCombine) - MEMCPY(primary_rgba, span->array->rgba, 4 * span->end * sizeof(GLchan)); - - /* - * Must do all texture sampling before combining in order to - * accomodate GL_ARB_texture_env_crossbar. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - if (ctx->Texture.Unit[unit]._ReallyEnabled) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - const struct gl_texture_object *curObj = texUnit->_Current; - GLfloat *lambda = span->array->lambda[unit]; - GLchan (*texels)[4] = (GLchan (*)[4]) - (swrast->TexelBuffer + unit * (span->end * 4 * sizeof(GLchan))); - - /* adjust texture lod (lambda) */ - if (span->arrayMask & SPAN_LAMBDA) { - if (texUnit->LodBias + curObj->LodBias != 0.0F) { - /* apply LOD bias, but don't clamp yet */ - const GLfloat bias = CLAMP(texUnit->LodBias + curObj->LodBias, - -ctx->Const.MaxTextureLodBias, - ctx->Const.MaxTextureLodBias); - GLuint i; - for (i = 0; i < span->end; i++) { - lambda[i] += bias; - } - } - - if (curObj->MinLod != -1000.0 || curObj->MaxLod != 1000.0) { - /* apply LOD clamping to lambda */ - const GLfloat min = curObj->MinLod; - const GLfloat max = curObj->MaxLod; - GLuint i; - for (i = 0; i < span->end; i++) { - GLfloat l = lambda[i]; - lambda[i] = CLAMP(l, min, max); - } - } - } - - /* Sample the texture (span->end fragments) */ - swrast->TextureSample[unit]( ctx, unit, texUnit->_Current, span->end, - (const GLfloat (*)[4]) span->array->texcoords[unit], - lambda, texels ); - - /* GL_SGI_texture_color_table */ - if (texUnit->ColorTableEnabled) { - _mesa_lookup_rgba_chan(&texUnit->ColorTable, span->end, texels); - } - } - } - - /* - * OK, now apply the texture (aka texture combine/blend). - * We modify the span->color.rgba values. - */ - for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) { - if (ctx->Texture.Unit[unit]._ReallyEnabled) { - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - if (texUnit->_CurrentCombine != &texUnit->_EnvMode ) { - texture_combine( ctx, unit, span->end, - (CONST GLchan (*)[4]) primary_rgba, - swrast->TexelBuffer, - span->array->rgba ); - } - else { - /* conventional texture blend */ - const GLchan (*texels)[4] = (const GLchan (*)[4]) - (swrast->TexelBuffer + unit * - (span->end * 4 * sizeof(GLchan))); - texture_apply( ctx, texUnit, span->end, - (CONST GLchan (*)[4]) primary_rgba, texels, - span->array->rgba ); - } - } - } -} diff --git a/src/mesa/swrast/s_texture.h b/src/mesa/swrast/s_texfilter.h index 698f363a1cd..e4445e79a09 100644 --- a/src/mesa/swrast/s_texture.h +++ b/src/mesa/swrast/s_texfilter.h @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.1 + * Version: 6.5 * - * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2005 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"), @@ -23,8 +23,8 @@ */ -#ifndef S_TEXTURE_H -#define S_TEXTURE_H +#ifndef S_TEXFILTER_H +#define S_TEXFILTER_H #include "mtypes.h" @@ -36,7 +36,4 @@ _swrast_choose_texture_sample_func( GLcontext *ctx, const struct gl_texture_object *tObj ); -extern void -_swrast_texture_span( GLcontext *ctx, struct sw_span *span ); - #endif |