s_fragprog.c revision 8d475822e6e19fa79719c856a2db5b6a205db1b9
1865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/* 2865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Mesa 3-D graphics library 3827e72de7537e62cac9652f8b7344ff356de9bb1Brian * Version: 7.0.3 4865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * 5827e72de7537e62cac9652f8b7344ff356de9bb1Brian * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 6865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * 7865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Permission is hereby granted, free of charge, to any person obtaining a 8865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * copy of this software and associated documentation files (the "Software"), 9865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * to deal in the Software without restriction, including without limitation 10865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * and/or sell copies of the Software, and to permit persons to whom the 12865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Software is furnished to do so, subject to the following conditions: 13865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * 14865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * The above copyright notice and this permission notice shall be included 15865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * in all copies or substantial portions of the Software. 16865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * 17865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 24865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 25c223c6b663cd5db39ba19c2be74b88cc3b8f53f3Brian#include "main/glheader.h" 26c223c6b663cd5db39ba19c2be74b88cc3b8f53f3Brian#include "main/colormac.h" 27c223c6b663cd5db39ba19c2be74b88cc3b8f53f3Brian#include "main/context.h" 28c223c6b663cd5db39ba19c2be74b88cc3b8f53f3Brian#include "main/texstate.h" 29c223c6b663cd5db39ba19c2be74b88cc3b8f53f3Brian#include "shader/prog_instruction.h" 30865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 31c968d3d410a1897ecbb41d3557adaef69a4c627aBrian#include "s_fragprog.h" 32865f88afc0d59d886fb2ad50429e584ecf17fa81Brian#include "s_span.h" 33865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 34865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 35865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/** 3654c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul * Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel' 3754c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul * and return results in 'colorOut'. 3854c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul */ 3954c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paulstatic INLINE void 4054c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paulswizzle_texel(const GLchan texel[4], GLfloat colorOut[4], GLuint swizzle) 4154c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul{ 4254c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul if (swizzle == SWIZZLE_NOOP) { 4354c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[0] = CHAN_TO_FLOAT(texel[0]); 4454c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[1] = CHAN_TO_FLOAT(texel[1]); 4554c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[2] = CHAN_TO_FLOAT(texel[2]); 4654c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[3] = CHAN_TO_FLOAT(texel[3]); 4754c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul } 4854c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul else { 4954c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul GLfloat vector[6]; 5054c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_X] = CHAN_TO_FLOAT(texel[0]); 5154c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_Y] = CHAN_TO_FLOAT(texel[1]); 5254c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_Z] = CHAN_TO_FLOAT(texel[2]); 5354c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_W] = CHAN_TO_FLOAT(texel[3]); 5454c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_ZERO] = 0.0F; 5554c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul vector[SWIZZLE_ONE] = 1.0F; 5654c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[0] = vector[GET_SWZ(swizzle, 0)]; 5754c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[1] = vector[GET_SWZ(swizzle, 1)]; 5854c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[2] = vector[GET_SWZ(swizzle, 2)]; 5954c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul colorOut[3] = vector[GET_SWZ(swizzle, 3)]; 6054c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul } 6154c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul} 6254c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul 6354c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul 6454c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul/** 65ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul * Fetch a texel with given lod. 66ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul * Called via machine->FetchTexelLod() 67865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 68865f88afc0d59d886fb2ad50429e584ecf17fa81Brianstatic void 69ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paulfetch_texel_lod( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, 70ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul GLuint unit, GLfloat color[4] ) 71865f88afc0d59d886fb2ad50429e584ecf17fa81Brian{ 72827e72de7537e62cac9652f8b7344ff356de9bb1Brian const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; 73865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 74be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul if (texObj) { 75be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul SWcontext *swrast = SWRAST_CONTEXT(ctx); 76be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul GLchan rgba[4]; 77be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul 78c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); 79ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul 80be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul /* XXX use a float-valued TextureSample routine here!!! */ 81be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul swrast->TextureSample[unit](ctx, texObj, 1, 82be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul (const GLfloat (*)[4]) texcoord, 83be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul &lambda, &rgba); 8454c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul swizzle_texel(rgba, color, texObj->_Swizzle); 85be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul } 86be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul else { 8788f3656ea7ae57d22141225db0c5d90ceab420ddBrian Paul ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F); 88be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul } 89865f88afc0d59d886fb2ad50429e584ecf17fa81Brian} 90865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 91865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 92865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/** 93865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Fetch a texel with the given partial derivatives to compute a level 94865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * of detail in the mipmap. 95ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul * Called via machine->FetchTexelDeriv() 96865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 97865f88afc0d59d886fb2ad50429e584ecf17fa81Brianstatic void 98865f88afc0d59d886fb2ad50429e584ecf17fa81Brianfetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], 99865f88afc0d59d886fb2ad50429e584ecf17fa81Brian const GLfloat texdx[4], const GLfloat texdy[4], 100999b55663a09d9669a9d14c5aadfa84e6dcba288Brian GLfloat lodBias, GLuint unit, GLfloat color[4] ) 101865f88afc0d59d886fb2ad50429e584ecf17fa81Brian{ 102865f88afc0d59d886fb2ad50429e584ecf17fa81Brian SWcontext *swrast = SWRAST_CONTEXT(ctx); 103865f88afc0d59d886fb2ad50429e584ecf17fa81Brian const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; 104865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 105c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul if (texObj) { 106be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul const struct gl_texture_image *texImg = 107be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul texObj->Image[0][texObj->BaseLevel]; 108c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul const GLfloat texW = (GLfloat) texImg->WidthScale; 109c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul const GLfloat texH = (GLfloat) texImg->HeightScale; 110be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul GLfloat lambda; 111be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul GLchan rgba[4]; 112865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 113c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ 114c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul texdx[1], texdy[1], /* dt/dx, dt/dy */ 115c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul texdx[3], texdy[2], /* dq/dx, dq/dy */ 116c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul texW, texH, 117c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul texcoord[0], texcoord[1], texcoord[3], 118c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul 1.0F / texcoord[3]) + lodBias; 119c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul 120c71fa34728ef4eddd074aeb2bee49ae6a7acb3d1Brian Paul lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod); 121999b55663a09d9669a9d14c5aadfa84e6dcba288Brian 122be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul /* XXX use a float-valued TextureSample routine here!!! */ 123be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul swrast->TextureSample[unit](ctx, texObj, 1, 124be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul (const GLfloat (*)[4]) texcoord, 125be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul &lambda, &rgba); 12654c62ba5c36f3e2b279151f5df851d2ceee15319Brian Paul swizzle_texel(rgba, color, texObj->_Swizzle); 127be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul } 128be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul else { 12988f3656ea7ae57d22141225db0c5d90ceab420ddBrian Paul ASSIGN_4V(color, 0.0F, 0.0F, 0.0F, 1.0F); 130be1a76f88f4c3482e61e0a048a0b28b6b628f223Brian Paul } 131865f88afc0d59d886fb2ad50429e584ecf17fa81Brian} 132865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 133865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 134865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/** 135865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Initialize the virtual fragment program machine state prior to running 136865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * fragment program on a fragment. This involves initializing the input 137865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * registers, condition codes, etc. 138865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * \param machine the virtual machine state to init 139865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * \param program the fragment program we're about to run 140865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * \param span the span of pixels we'll operate on 141865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * \param col which element (column) of the span we'll operate on 142865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 143865f88afc0d59d886fb2ad50429e584ecf17fa81Brianstatic void 144f6803de7396edda2223adf7ff7445579dbe475c9Brianinit_machine(GLcontext *ctx, struct gl_program_machine *machine, 145f6803de7396edda2223adf7ff7445579dbe475c9Brian const struct gl_fragment_program *program, 146f6803de7396edda2223adf7ff7445579dbe475c9Brian const SWspan *span, GLuint col) 147865f88afc0d59d886fb2ad50429e584ecf17fa81Brian{ 148ced6f76404ff1a6713c85edff17551f82c33cc24Brian if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { 149865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* Clear temporary registers (undefined for ARB_f_p) */ 150865f88afc0d59d886fb2ad50429e584ecf17fa81Brian _mesa_bzero(machine->Temporaries, 1513ed1acd13c7876288a5d1ab6d288b1654f0c2e6dBrian MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); 152865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 153865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 154f3e507ef9f75dbfc58ccd07b5fe8cfca10d9a9e3Brian /* Setup pointer to input attributes */ 155f3e507ef9f75dbfc58ccd07b5fe8cfca10d9a9e3Brian machine->Attribs = span->array->attribs; 15610b5895597d5e069183cb647d17eb412effceb4fBrian 15760d136f63c5a5a18b12952ec8e8532cbce086a4dBrian machine->DerivX = (GLfloat (*)[4]) span->attrStepX; 15860d136f63c5a5a18b12952ec8e8532cbce086a4dBrian machine->DerivY = (GLfloat (*)[4]) span->attrStepY; 15960d136f63c5a5a18b12952ec8e8532cbce086a4dBrian machine->NumDeriv = FRAG_ATTRIB_MAX; 16060d136f63c5a5a18b12952ec8e8532cbce086a4dBrian 161ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul machine->Samplers = program->Base.SamplerUnits; 162ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul 163e48f0b09abe42aa3393a492af07e53b76ad0ff3cBrian /* if running a GLSL program (not ARB_fragment_program) */ 164af0ae93863b4c876e70efa4e7406f04a3409f135Brian if (ctx->Shader.CurrentProgram) { 165af0ae93863b4c876e70efa4e7406f04a3409f135Brian /* Store front/back facing value in register FOGC.Y */ 16602afd45d3b2eccff5d566cdeb32b3211803bd500Brian machine->Attribs[FRAG_ATTRIB_FOGC][col][1] = 1.0 - span->facing; 1673a428aca93fe2bab84ddfaf794a396133e802465Brian Paul /* Note FOGC.ZW is gl_PointCoord if drawing a sprite */ 168af0ae93863b4c876e70efa4e7406f04a3409f135Brian } 16910b5895597d5e069183cb647d17eb412effceb4fBrian 170f6803de7396edda2223adf7ff7445579dbe475c9Brian machine->CurElement = col; 171865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 172865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* init condition codes */ 173865f88afc0d59d886fb2ad50429e584ecf17fa81Brian machine->CondCodes[0] = COND_EQ; 174865f88afc0d59d886fb2ad50429e584ecf17fa81Brian machine->CondCodes[1] = COND_EQ; 175865f88afc0d59d886fb2ad50429e584ecf17fa81Brian machine->CondCodes[2] = COND_EQ; 176865f88afc0d59d886fb2ad50429e584ecf17fa81Brian machine->CondCodes[3] = COND_EQ; 177865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 178865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* init call stack */ 179865f88afc0d59d886fb2ad50429e584ecf17fa81Brian machine->StackDepth = 0; 180f6803de7396edda2223adf7ff7445579dbe475c9Brian 181ade508312c701ce89d3c2cd717994dbbabb4f207Brian Paul machine->FetchTexelLod = fetch_texel_lod; 182f6803de7396edda2223adf7ff7445579dbe475c9Brian machine->FetchTexelDeriv = fetch_texel_deriv; 183865f88afc0d59d886fb2ad50429e584ecf17fa81Brian} 184865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 185865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 186865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/** 187865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Run fragment program on the pixels in span from 'start' to 'end' - 1. 188865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 189865f88afc0d59d886fb2ad50429e584ecf17fa81Brianstatic void 190865f88afc0d59d886fb2ad50429e584ecf17fa81Brianrun_program(GLcontext *ctx, SWspan *span, GLuint start, GLuint end) 191865f88afc0d59d886fb2ad50429e584ecf17fa81Brian{ 1921c09bcfdda4083636a3ac27d804a34ef87875ce7Brian SWcontext *swrast = SWRAST_CONTEXT(ctx); 193865f88afc0d59d886fb2ad50429e584ecf17fa81Brian const struct gl_fragment_program *program = ctx->FragmentProgram._Current; 1941c09bcfdda4083636a3ac27d804a34ef87875ce7Brian const GLbitfield outputsWritten = program->Base.OutputsWritten; 1958b5fce6bcc88cd9dd321f0db95c1714e5e5e85a1Brian struct gl_program_machine *machine = &swrast->FragProgMachine; 196865f88afc0d59d886fb2ad50429e584ecf17fa81Brian GLuint i; 197865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 198865f88afc0d59d886fb2ad50429e584ecf17fa81Brian for (i = start; i < end; i++) { 199865f88afc0d59d886fb2ad50429e584ecf17fa81Brian if (span->array->mask[i]) { 2008b5fce6bcc88cd9dd321f0db95c1714e5e5e85a1Brian init_machine(ctx, machine, program, span, i); 201865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 2028b5fce6bcc88cd9dd321f0db95c1714e5e5e85a1Brian if (_mesa_execute_program(ctx, &program->Base, machine)) { 2031c09bcfdda4083636a3ac27d804a34ef87875ce7Brian 204865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* Store result color */ 2058d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul if (outputsWritten & (1 << FRAG_RESULT_COLOR)) { 2061c09bcfdda4083636a3ac27d804a34ef87875ce7Brian COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0][i], 2078d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul machine->Outputs[FRAG_RESULT_COLOR]); 2081c09bcfdda4083636a3ac27d804a34ef87875ce7Brian } 2091c09bcfdda4083636a3ac27d804a34ef87875ce7Brian else { 2101c09bcfdda4083636a3ac27d804a34ef87875ce7Brian /* Multiple drawbuffers / render targets 2111c09bcfdda4083636a3ac27d804a34ef87875ce7Brian * Note that colors beyond 0 and 1 will overwrite other 2121c09bcfdda4083636a3ac27d804a34ef87875ce7Brian * attributes, such as FOGC, TEX0, TEX1, etc. That's OK. 2131c09bcfdda4083636a3ac27d804a34ef87875ce7Brian */ 214ff73c783cc47361ff0dd819c82d067b4b85870ddBrian GLuint buf; 215ff73c783cc47361ff0dd819c82d067b4b85870ddBrian for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) { 216ff73c783cc47361ff0dd819c82d067b4b85870ddBrian if (outputsWritten & (1 << (FRAG_RESULT_DATA0 + buf))) { 217ff73c783cc47361ff0dd819c82d067b4b85870ddBrian COPY_4V(span->array->attribs[FRAG_ATTRIB_COL0 + buf][i], 218ff73c783cc47361ff0dd819c82d067b4b85870ddBrian machine->Outputs[FRAG_RESULT_DATA0 + buf]); 2191c09bcfdda4083636a3ac27d804a34ef87875ce7Brian } 2201c09bcfdda4083636a3ac27d804a34ef87875ce7Brian } 2211c09bcfdda4083636a3ac27d804a34ef87875ce7Brian } 222865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 223865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* Store result depth/z */ 2248d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul if (outputsWritten & (1 << FRAG_RESULT_DEPTH)) { 2258d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul const GLfloat depth = machine->Outputs[FRAG_RESULT_DEPTH][2]; 226865f88afc0d59d886fb2ad50429e584ecf17fa81Brian if (depth <= 0.0) 227865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->array->z[i] = 0; 228865f88afc0d59d886fb2ad50429e584ecf17fa81Brian else if (depth >= 1.0) 229865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->array->z[i] = ctx->DrawBuffer->_DepthMax; 230865f88afc0d59d886fb2ad50429e584ecf17fa81Brian else 231865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF); 232865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 233865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 234865f88afc0d59d886fb2ad50429e584ecf17fa81Brian else { 235865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* killed fragment */ 236865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->array->mask[i] = GL_FALSE; 237865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->writeAll = GL_FALSE; 238865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 239865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 240865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 241865f88afc0d59d886fb2ad50429e584ecf17fa81Brian} 242865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 243865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 244865f88afc0d59d886fb2ad50429e584ecf17fa81Brian/** 245865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * Execute the current fragment program for all the fragments 246865f88afc0d59d886fb2ad50429e584ecf17fa81Brian * in the given span. 247865f88afc0d59d886fb2ad50429e584ecf17fa81Brian */ 248865f88afc0d59d886fb2ad50429e584ecf17fa81Brianvoid 249865f88afc0d59d886fb2ad50429e584ecf17fa81Brian_swrast_exec_fragment_program( GLcontext *ctx, SWspan *span ) 250865f88afc0d59d886fb2ad50429e584ecf17fa81Brian{ 251865f88afc0d59d886fb2ad50429e584ecf17fa81Brian const struct gl_fragment_program *program = ctx->FragmentProgram._Current; 252865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 253865f88afc0d59d886fb2ad50429e584ecf17fa81Brian /* incoming colors should be floats */ 25417ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian if (program->Base.InputsRead & FRAG_BIT_COL0) { 25517ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian ASSERT(span->array->ChanType == GL_FLOAT); 25617ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian } 257865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 258865f88afc0d59d886fb2ad50429e584ecf17fa81Brian ctx->_CurrentProgram = GL_FRAGMENT_PROGRAM_ARB; /* or NV, doesn't matter */ 259865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 260865f88afc0d59d886fb2ad50429e584ecf17fa81Brian run_program(ctx, span, 0, span->end); 261865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 2628d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul if (program->Base.OutputsWritten & (1 << FRAG_RESULT_COLOR)) { 26317ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian span->interpMask &= ~SPAN_RGBA; 26417ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian span->arrayMask |= SPAN_RGBA; 26517ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian } 26617ad1d12ebf04ebf4b2b35c1c37d36bb4d2bb550Brian 2678d475822e6e19fa79719c856a2db5b6a205db1b9Brian Paul if (program->Base.OutputsWritten & (1 << FRAG_RESULT_DEPTH)) { 268865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->interpMask &= ~SPAN_Z; 269865f88afc0d59d886fb2ad50429e584ecf17fa81Brian span->arrayMask |= SPAN_Z; 270865f88afc0d59d886fb2ad50429e584ecf17fa81Brian } 271865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 272865f88afc0d59d886fb2ad50429e584ecf17fa81Brian ctx->_CurrentProgram = 0; 273865f88afc0d59d886fb2ad50429e584ecf17fa81Brian} 274865f88afc0d59d886fb2ad50429e584ecf17fa81Brian 275