The Tor Browser: gfx/skia/trunk/src/gpu/gl/GrGLProgramEffects.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLProgramEffects.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLProgramEffects.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLProgramEffects.h"
 #include "GrDrawEffect.h"
 #include "gl/GrGLEffect.h"
 #include "gl/GrGLShaderBuilder.h"
 #include "gl/GrGLVertexEffect.h"
 #include "gl/GrGpuGL.h"
 typedef GrGLProgramEffects::EffectKey EffectKey;
 typedef GrGLProgramEffects::TransformedCoords TransformedCoords;
 typedef GrGLProgramEffects::TransformedCoordsArray TransformedCoordsArray;
 typedef GrGLProgramEffects::TextureSampler TextureSampler;
 typedef GrGLProgramEffects::TextureSamplerArray TextureSamplerArray;
 /**
  * We specialize the vertex code for each of these matrix types.
  */
 enum MatrixType {
     kIdentity_MatrixType = 0,
     kTrans_MatrixType    = 1,
     kNoPersp_MatrixType  = 2,
     kGeneral_MatrixType  = 3,
 };
 /**
  * The key for an individual coord transform is made up of a matrix type and a bit that
  * indicates the source of the input coords.
  */
 enum {
     kMatrixTypeKeyBits   = 2,
     kMatrixTypeKeyMask   = (1 << kMatrixTypeKeyBits) - 1,
     kPositionCoords_Flag = (1 << kMatrixTypeKeyBits),
     kTransformKeyBits    = kMatrixTypeKeyBits + 1,
 };
 namespace {
 /**
  * Do we need to either map r,g,b->a or a->r. configComponentMask indicates which channels are
  * present in the texture's config. swizzleComponentMask indicates the channels present in the
  * shader swizzle.
  */
 inline bool swizzle_requires_alpha_remapping(const GrGLCaps& caps,
                                              uint32_t configComponentMask,
                                              uint32_t swizzleComponentMask) {
     if (caps.textureSwizzleSupport()) {
         // Any remapping is handled using texture swizzling not shader modifications.
         return false;
     }
     // check if the texture is alpha-only
     if (kA_GrColorComponentFlag == configComponentMask) {
         if (caps.textureRedSupport() && (kA_GrColorComponentFlag & swizzleComponentMask)) {
             // we must map the swizzle 'a's to 'r'.
             return true;
         }
         if (kRGB_GrColorComponentFlags & swizzleComponentMask) {
             // The 'r', 'g', and/or 'b's must be mapped to 'a' according to our semantics that
             // alpha-only textures smear alpha across all four channels when read.
             return true;
         }
     }
     return false;
 }
 /**
  * Retrieves the matrix type from transformKey for the transform at transformIdx.
  */
 MatrixType get_matrix_type(EffectKey transformKey, int transformIdx) {
     return static_cast<MatrixType>(
                (transformKey >> (kTransformKeyBits * transformIdx)) & kMatrixTypeKeyMask);
 }
 /**
  * Retrieves the source coords from transformKey for the transform at transformIdx. It may not be
  * the same coordinate set as the original GrCoordTransform if the position and local coords are
  * identical for this program.
  */
 GrCoordSet get_source_coords(EffectKey transformKey, int transformIdx) {
     return (transformKey >> (kTransformKeyBits * transformIdx)) & kPositionCoords_Flag ?
                kPosition_GrCoordSet :
                kLocal_GrCoordSet;
 }
 /**
  * Retrieves the final translation that a transform needs to apply to its source coords (and
  * verifies that a translation is all it needs).
  */
 void get_transform_translation(const GrDrawEffect& drawEffect,
                                int transformIdx,
                                GrGLfloat* tx,
                                GrGLfloat* ty) {
     const GrCoordTransform& coordTransform = (*drawEffect.effect())->coordTransform(transformIdx);
     SkASSERT(!coordTransform.reverseY());
     const SkMatrix& matrix = coordTransform.getMatrix();
     if (kLocal_GrCoordSet == coordTransform.sourceCoords() &&
         !drawEffect.programHasExplicitLocalCoords()) {
         const SkMatrix& coordChangeMatrix = drawEffect.getCoordChangeMatrix();
         SkASSERT(SkMatrix::kTranslate_Mask == (matrix.getType() | coordChangeMatrix.getType()));
         *tx = SkScalarToFloat(matrix[SkMatrix::kMTransX] + coordChangeMatrix[SkMatrix::kMTransX]);
         *ty = SkScalarToFloat(matrix[SkMatrix::kMTransY] + coordChangeMatrix[SkMatrix::kMTransY]);
     } else {
         SkASSERT(SkMatrix::kTranslate_Mask == matrix.getType());
         *tx = SkScalarToFloat(matrix[SkMatrix::kMTransX]);
         *ty = SkScalarToFloat(matrix[SkMatrix::kMTransY]);
     }
 }
 /**
  * Retrieves the final matrix that a transform needs to apply to its source coords.
  */
 SkMatrix get_transform_matrix(const GrDrawEffect& drawEffect, int transformIdx) {
     const GrCoordTransform& coordTransform = (*drawEffect.effect())->coordTransform(transformIdx);
     SkMatrix combined;
     if (kLocal_GrCoordSet == coordTransform.sourceCoords() &&
         !drawEffect.programHasExplicitLocalCoords()) {
         combined.setConcat(coordTransform.getMatrix(), drawEffect.getCoordChangeMatrix());
     } else {
         combined = coordTransform.getMatrix();
     }
     if (coordTransform.reverseY()) {
         // combined.postScale(1,-1);
         // combined.postTranslate(0,1);
         combined.set(SkMatrix::kMSkewY,
             combined[SkMatrix::kMPersp0] - combined[SkMatrix::kMSkewY]);
         combined.set(SkMatrix::kMScaleY,
             combined[SkMatrix::kMPersp1] - combined[SkMatrix::kMScaleY]);
         combined.set(SkMatrix::kMTransY,
             combined[SkMatrix::kMPersp2] - combined[SkMatrix::kMTransY]);
     }
     return combined;
 }
 }
 ////////////////////////////////////////////////////////////////////////////////
 EffectKey GrGLProgramEffects::GenAttribKey(const GrDrawEffect& drawEffect) {
     EffectKey key = 0;
     int numAttributes = drawEffect.getVertexAttribIndexCount();
     SkASSERT(numAttributes <= 2);
     const int* attributeIndices = drawEffect.getVertexAttribIndices();
     for (int a = 0; a < numAttributes; ++a) {
         EffectKey value = attributeIndices[a] << 3 * a;
         SkASSERT(0 == (value & key)); // keys for each attribute ought not to overlap
         key |= value;
     }
     return key;
 }
 EffectKey GrGLProgramEffects::GenTransformKey(const GrDrawEffect& drawEffect) {
     EffectKey totalKey = 0;
     int numTransforms = (*drawEffect.effect())->numTransforms();
     for (int t = 0; t < numTransforms; ++t) {
         EffectKey key = 0;
         const GrCoordTransform& coordTransform = (*drawEffect.effect())->coordTransform(t);
         SkMatrix::TypeMask type0 = coordTransform.getMatrix().getType();
         SkMatrix::TypeMask type1;
         if (kLocal_GrCoordSet == coordTransform.sourceCoords()) {
             type1 = drawEffect.getCoordChangeMatrix().getType();
         } else {
             if (drawEffect.programHasExplicitLocalCoords()) {
                 // We only make the key indicate that device coords are referenced when the local coords
                 // are not actually determined by positions. Otherwise the local coords var and position
                 // var are identical.
                 key |= kPositionCoords_Flag;
             }
             type1 = SkMatrix::kIdentity_Mask;
         }
         int combinedTypes = type0 | type1;
         bool reverseY = coordTransform.reverseY();
         if (SkMatrix::kPerspective_Mask & combinedTypes) {
             key |= kGeneral_MatrixType;
         } else if (((SkMatrix::kAffine_Mask | SkMatrix::kScale_Mask) & combinedTypes) || reverseY) {
             key |= kNoPersp_MatrixType;
         } else if (SkMatrix::kTranslate_Mask & combinedTypes) {
             key |= kTrans_MatrixType;
         } else {
             key |= kIdentity_MatrixType;
         }
         key <<= kTransformKeyBits * t;
         SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
         totalKey |= key;
     }
     return totalKey;
 }
 EffectKey GrGLProgramEffects::GenTextureKey(const GrDrawEffect& drawEffect, const GrGLCaps& caps) {
     EffectKey key = 0;
     int numTextures = (*drawEffect.effect())->numTextures();
     for (int t = 0; t < numTextures; ++t) {
         const GrTextureAccess& access = (*drawEffect.effect())->textureAccess(t);
         uint32_t configComponentMask = GrPixelConfigComponentMask(access.getTexture()->config());
         if (swizzle_requires_alpha_remapping(caps, configComponentMask, access.swizzleMask())) {
             key |= 1 << t;
         }
     }
     return key;
 }
 GrGLProgramEffects::~GrGLProgramEffects() {
     int numEffects = fGLEffects.count();
     for (int e = 0; e < numEffects; ++e) {
         SkDELETE(fGLEffects[e]);
     }
 }
 void GrGLProgramEffects::emitSamplers(GrGLShaderBuilder* builder,
                                       const GrEffectRef& effect,
                                       TextureSamplerArray* outSamplers) {
     SkTArray<Sampler, true>& samplers = fSamplers.push_back();
     int numTextures = effect->numTextures();
     samplers.push_back_n(numTextures);
     SkString name;
     for (int t = 0; t < numTextures; ++t) {
         name.printf("Sampler%d", t);
         samplers[t].fUniform = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                                    kSampler2D_GrSLType,
                                                    name.c_str());
         SkNEW_APPEND_TO_TARRAY(outSamplers, TextureSampler,
                                (samplers[t].fUniform, effect->textureAccess(t)));
     }
 }
 void GrGLProgramEffects::initSamplers(const GrGLUniformManager& uniformManager, int* texUnitIdx) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         SkTArray<Sampler, true>& samplers = fSamplers[e];
         int numSamplers = samplers.count();
         for (int s = 0; s < numSamplers; ++s) {
             SkASSERT(samplers[s].fUniform.isValid());
             uniformManager.setSampler(samplers[s].fUniform, *texUnitIdx);
             samplers[s].fTextureUnit = (*texUnitIdx)++;
         }
     }
 }
 void GrGLProgramEffects::bindTextures(GrGpuGL* gpu, const GrEffectRef& effect, int effectIdx) {
     const SkTArray<Sampler, true>& samplers = fSamplers[effectIdx];
     int numSamplers = samplers.count();
     SkASSERT(numSamplers == effect->numTextures());
     for (int s = 0; s < numSamplers; ++s) {
         SkASSERT(samplers[s].fTextureUnit >= 0);
         const GrTextureAccess& textureAccess = effect->textureAccess(s);
         gpu->bindTexture(samplers[s].fTextureUnit,
                          textureAccess.getParams(),
                          static_cast<GrGLTexture*>(textureAccess.getTexture()));
     }
 }
 ////////////////////////////////////////////////////////////////////////////////
 void GrGLVertexProgramEffects::emitEffect(GrGLFullShaderBuilder* builder,
                                           const GrEffectStage& stage,
                                           EffectKey key,
                                           const char* outColor,
                                           const char* inColor,
                                           int stageIndex) {
     GrDrawEffect drawEffect(stage, fHasExplicitLocalCoords);
     const GrEffectRef& effect = *stage.getEffect();
     SkSTArray<2, TransformedCoords> coords(effect->numTransforms());
     SkSTArray<4, TextureSampler> samplers(effect->numTextures());
     this->emitAttributes(builder, stage);
     this->emitTransforms(builder, effect, key, &coords);
     this->emitSamplers(builder, effect, &samplers);
     GrGLEffect* glEffect = effect->getFactory().createGLInstance(drawEffect);
     fGLEffects.push_back(glEffect);
     // Enclose custom code in a block to avoid namespace conflicts
     SkString openBrace;
     openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());
     builder->vsCodeAppend(openBrace.c_str());
     builder->fsCodeAppend(openBrace.c_str());
     if (glEffect->isVertexEffect()) {
         GrGLVertexEffect* vertexEffect = static_cast<GrGLVertexEffect*>(glEffect);
         vertexEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
     } else {
         glEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
     }
     builder->vsCodeAppend("\t}\n");
     builder->fsCodeAppend("\t}\n");
 }
 void GrGLVertexProgramEffects::emitAttributes(GrGLFullShaderBuilder* builder,
                                               const GrEffectStage& stage) {
     int numAttributes = stage.getVertexAttribIndexCount();
     const int* attributeIndices = stage.getVertexAttribIndices();
     for (int a = 0; a < numAttributes; ++a) {
         // TODO: Make addAttribute mangle the name.
         SkString attributeName("aAttr");
         attributeName.appendS32(attributeIndices[a]);
         builder->addEffectAttribute(attributeIndices[a],
                                     (*stage.getEffect())->vertexAttribType(a),
                                     attributeName);
     }
 }
 void GrGLVertexProgramEffects::emitTransforms(GrGLFullShaderBuilder* builder,
                                               const GrEffectRef& effect,
                                               EffectKey effectKey,
                                               TransformedCoordsArray* outCoords) {
     SkTArray<Transform, true>& transforms = fTransforms.push_back();
     EffectKey totalKey = GrBackendEffectFactory::GetTransformKey(effectKey);
     int numTransforms = effect->numTransforms();
     transforms.push_back_n(numTransforms);
     for (int t = 0; t < numTransforms; t++) {
         GrSLType varyingType = kVoid_GrSLType;
         const char* uniName;
         switch (get_matrix_type(totalKey, t)) {
             case kIdentity_MatrixType:
                 transforms[t].fType = kVoid_GrSLType;
                 uniName = NULL;
                 varyingType = kVec2f_GrSLType;
                 break;
             case kTrans_MatrixType:
                 transforms[t].fType = kVec2f_GrSLType;
                 uniName = "StageTranslate";
                 varyingType = kVec2f_GrSLType;
                 break;
             case kNoPersp_MatrixType:
                 transforms[t].fType = kMat33f_GrSLType;
                 uniName = "StageMatrix";
                 varyingType = kVec2f_GrSLType;
                 break;
             case kGeneral_MatrixType:
                 transforms[t].fType = kMat33f_GrSLType;
                 uniName = "StageMatrix";
                 varyingType = kVec3f_GrSLType;
                 break;
             default:
                 GrCrash("Unexpected key.");
         }
         SkString suffixedUniName;
         if (kVoid_GrSLType != transforms[t].fType) {
             if (0 != t) {
                 suffixedUniName.append(uniName);
                 suffixedUniName.appendf("_%i", t);
                 uniName = suffixedUniName.c_str();
             }
             transforms[t].fHandle = builder->addUniform(GrGLShaderBuilder::kVertex_Visibility,
                                                         transforms[t].fType,
                                                         uniName,
                                                         &uniName);
         }
         const char* varyingName = "MatrixCoord";
         SkString suffixedVaryingName;
         if (0 != t) {
             suffixedVaryingName.append(varyingName);
             suffixedVaryingName.appendf("_%i", t);
             varyingName = suffixedVaryingName.c_str();
         }
         const char* vsVaryingName;
         const char* fsVaryingName;
         builder->addVarying(varyingType, varyingName, &vsVaryingName, &fsVaryingName);
         const GrGLShaderVar& coords = kPosition_GrCoordSet == get_source_coords(totalKey, t) ?
                                           builder->positionAttribute() :
                                           builder->localCoordsAttribute();
         // varying = matrix * coords (logically)
         switch (transforms[t].fType) {
             case kVoid_GrSLType:
                 SkASSERT(kVec2f_GrSLType == varyingType);
                 builder->vsCodeAppendf("\t%s = %s;\n", vsVaryingName, coords.c_str());
                 break;
             case kVec2f_GrSLType:
                 SkASSERT(kVec2f_GrSLType == varyingType);
                 builder->vsCodeAppendf("\t%s = %s + %s;\n",
                                        vsVaryingName, uniName, coords.c_str());
                 break;
             case kMat33f_GrSLType: {
                 SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
                 if (kVec2f_GrSLType == varyingType) {
                     builder->vsCodeAppendf("\t%s = (%s * vec3(%s, 1)).xy;\n",
                                            vsVaryingName, uniName, coords.c_str());
                 } else {
                     builder->vsCodeAppendf("\t%s = %s * vec3(%s, 1);\n",
                                            vsVaryingName, uniName, coords.c_str());
                 }
                 break;
             }
             default:
                 GrCrash("Unexpected uniform type.");
         }
         SkNEW_APPEND_TO_TARRAY(outCoords, TransformedCoords,
                                (SkString(fsVaryingName), varyingType));
     }
 }
 void GrGLVertexProgramEffects::setData(GrGpuGL* gpu,
                                        const GrGLUniformManager& uniformManager,
                                        const GrEffectStage* effectStages[]) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fTransforms.count());
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         GrDrawEffect drawEffect(*effectStages[e], fHasExplicitLocalCoords);
         fGLEffects[e]->setData(uniformManager, drawEffect);
         this->setTransformData(uniformManager, drawEffect, e);
         this->bindTextures(gpu, *drawEffect.effect(), e);
     }
 }
 void GrGLVertexProgramEffects::setTransformData(const GrGLUniformManager& uniformManager,
                                                 const GrDrawEffect& drawEffect,
                                                 int effectIdx) {
     SkTArray<Transform, true>& transforms = fTransforms[effectIdx];
     int numTransforms = transforms.count();
     SkASSERT(numTransforms == (*drawEffect.effect())->numTransforms());
     for (int t = 0; t < numTransforms; ++t) {
         SkASSERT(transforms[t].fHandle.isValid() != (kVoid_GrSLType == transforms[t].fType));
         switch (transforms[t].fType) {
             case kVoid_GrSLType:
                 SkASSERT(get_transform_matrix(drawEffect, t).isIdentity());
                 return;
             case kVec2f_GrSLType: {
                 GrGLfloat tx, ty;
                 get_transform_translation(drawEffect, t, &tx, &ty);
                 if (transforms[t].fCurrentValue.get(SkMatrix::kMTransX) != tx ||
                     transforms[t].fCurrentValue.get(SkMatrix::kMTransY) != ty) {
                     uniformManager.set2f(transforms[t].fHandle, tx, ty);
                     transforms[t].fCurrentValue.set(SkMatrix::kMTransX, tx);
                     transforms[t].fCurrentValue.set(SkMatrix::kMTransY, ty);
                 }
                 break;
             }
             case kMat33f_GrSLType: {
                 const SkMatrix& matrix = get_transform_matrix(drawEffect, t);
                 if (!transforms[t].fCurrentValue.cheapEqualTo(matrix)) {
                     uniformManager.setSkMatrix(transforms[t].fHandle, matrix);
                     transforms[t].fCurrentValue = matrix;
                 }
                 break;
             }
             default:
                 GrCrash("Unexpected uniform type.");
         }
     }
 }
 GrGLVertexProgramEffectsBuilder::GrGLVertexProgramEffectsBuilder(GrGLFullShaderBuilder* builder,
                                                                  int reserveCount)
     : fBuilder(builder)
     , fProgramEffects(SkNEW_ARGS(GrGLVertexProgramEffects,
                                  (reserveCount, fBuilder->hasExplicitLocalCoords()))) {
 }
 void GrGLVertexProgramEffectsBuilder::emitEffect(const GrEffectStage& stage,
                                                  GrGLProgramEffects::EffectKey key,
                                                  const char* outColor,
                                                  const char* inColor,
                                                  int stageIndex) {
     SkASSERT(NULL != fProgramEffects.get());
     fProgramEffects->emitEffect(fBuilder, stage, key, outColor, inColor, stageIndex);
 }
 ////////////////////////////////////////////////////////////////////////////////
 void GrGLTexGenProgramEffects::emitEffect(GrGLFragmentOnlyShaderBuilder* builder,
                                           const GrEffectStage& stage,
                                           EffectKey key,
                                           const char* outColor,
                                           const char* inColor,
                                           int stageIndex) {
     GrDrawEffect drawEffect(stage, false);
     const GrEffectRef& effect = *stage.getEffect();
     SkSTArray<2, TransformedCoords> coords(effect->numTransforms());
     SkSTArray<4, TextureSampler> samplers(effect->numTextures());
     SkASSERT(0 == stage.getVertexAttribIndexCount());
     this->setupTexGen(builder, effect, key, &coords);
     this->emitSamplers(builder, effect, &samplers);
     GrGLEffect* glEffect = effect->getFactory().createGLInstance(drawEffect);
     fGLEffects.push_back(glEffect);
     // Enclose custom code in a block to avoid namespace conflicts
     SkString openBrace;
     openBrace.printf("\t{ // Stage %d: %s\n", stageIndex, glEffect->name());
     builder->fsCodeAppend(openBrace.c_str());
     SkASSERT(!glEffect->isVertexEffect());
     glEffect->emitCode(builder, drawEffect, key, outColor, inColor, coords, samplers);
     builder->fsCodeAppend("\t}\n");
 }
 void GrGLTexGenProgramEffects::setupTexGen(GrGLFragmentOnlyShaderBuilder* builder,
                                            const GrEffectRef& effect,
                                            EffectKey effectKey,
                                            TransformedCoordsArray* outCoords) {
     int numTransforms = effect->numTransforms();
     EffectKey totalKey = GrBackendEffectFactory::GetTransformKey(effectKey);
     int texCoordIndex = builder->addTexCoordSets(numTransforms);
     SkNEW_APPEND_TO_TARRAY(&fTransforms, Transforms, (totalKey, texCoordIndex));
     SkString name;
     for (int t = 0; t < numTransforms; ++t) {
         GrSLType type = kGeneral_MatrixType == get_matrix_type(totalKey, t) ?
                             kVec3f_GrSLType :
                             kVec2f_GrSLType;
         name.printf("%s(gl_TexCoord[%i])", GrGLSLTypeString(type), texCoordIndex++);
         SkNEW_APPEND_TO_TARRAY(outCoords, TransformedCoords, (name, type));
     }
 }
 void GrGLTexGenProgramEffects::setData(GrGpuGL* gpu,
                                        const GrGLUniformManager& uniformManager,
                                        const GrEffectStage* effectStages[]) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fTransforms.count());
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         GrDrawEffect drawEffect(*effectStages[e], false);
         fGLEffects[e]->setData(uniformManager, drawEffect);
         this->setTexGenState(gpu, drawEffect, e);
         this->bindTextures(gpu, *drawEffect.effect(), e);
     }
 }
 void GrGLTexGenProgramEffects::setTexGenState(GrGpuGL* gpu,
                                               const GrDrawEffect& drawEffect,
                                               int effectIdx) {
     EffectKey totalKey = fTransforms[effectIdx].fTransformKey;
     int texCoordIndex = fTransforms[effectIdx].fTexCoordIndex;
     int numTransforms = (*drawEffect.effect())->numTransforms();
     for (int t = 0; t < numTransforms; ++t) {
         switch (get_matrix_type(totalKey, t)) {
             case kIdentity_MatrixType: {
                 SkASSERT(get_transform_matrix(drawEffect, t).isIdentity());
                 GrGLfloat identity[] = {1, 0, 0,
 , 1, 0};
                 gpu->enableTexGen(texCoordIndex++, GrGpuGL::kST_TexGenComponents, identity);
                 break;
             }
             case kTrans_MatrixType: {
                 GrGLfloat tx, ty;
                 get_transform_translation(drawEffect, t, &tx, &ty);
                 GrGLfloat translate[] = {1, 0, tx,
 , 1, ty};
                 gpu->enableTexGen(texCoordIndex++, GrGpuGL::kST_TexGenComponents, translate);
                 break;
             }
             case kNoPersp_MatrixType: {
                 const SkMatrix& transform = get_transform_matrix(drawEffect, t);
                 gpu->enableTexGen(texCoordIndex++, GrGpuGL::kST_TexGenComponents, transform);
                 break;
             }
             case kGeneral_MatrixType: {
                 const SkMatrix& transform = get_transform_matrix(drawEffect, t);
                 gpu->enableTexGen(texCoordIndex++, GrGpuGL::kSTR_TexGenComponents, transform);
                 break;
             }
             default:
                 GrCrash("Unexpected matrixs type.");
         }
     }
 }
 GrGLTexGenProgramEffectsBuilder::GrGLTexGenProgramEffectsBuilder(
         GrGLFragmentOnlyShaderBuilder* builder,
         int reserveCount)
     : fBuilder(builder)
     , fProgramEffects(SkNEW_ARGS(GrGLTexGenProgramEffects, (reserveCount))) {
 }
 void GrGLTexGenProgramEffectsBuilder::emitEffect(const GrEffectStage& stage,
                                                  GrGLProgramEffects::EffectKey key,
                                                  const char* outColor,
                                                  const char* inColor,
                                                  int stageIndex) {
     SkASSERT(NULL != fProgramEffects.get());
     fProgramEffects->emitEffect(fBuilder, stage, key, outColor, inColor, stageIndex);
 }

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/gl/GrGLProgramEffects.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLProgramEffects.cpp