The Tor Browser: gfx/skia/trunk/src/gpu/gl/GrGLShaderBuilder.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGLShaderBuilder.cpp@129ffea94266 (annotated)

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

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "gl/GrGLShaderBuilder.h"
 #include "gl/GrGLProgram.h"
 #include "gl/GrGLUniformHandle.h"
 #include "GrCoordTransform.h"
 #include "GrDrawEffect.h"
 #include "GrGpuGL.h"
 #include "GrTexture.h"
 #include "SkRTConf.h"
 #include "SkTrace.h"
 #define GL_CALL(X) GR_GL_CALL(this->gpu()->glInterface(), X)
 #define GL_CALL_RET(R, X) GR_GL_CALL_RET(this->gpu()->glInterface(), R, X)
 // number of each input/output type in a single allocation block
 static const int kVarsPerBlock = 8;
 // except FS outputs where we expect 2 at most.
 static const int kMaxFSOutputs = 2;
 // ES2 FS only guarantees mediump and lowp support
 static const GrGLShaderVar::Precision kDefaultFragmentPrecision = GrGLShaderVar::kMedium_Precision;
 typedef GrGLUniformManager::UniformHandle UniformHandle;
 SK_CONF_DECLARE(bool, c_PrintShaders, "gpu.printShaders", false,
                 "Print the source code for all shaders generated.");
 ///////////////////////////////////////////////////////////////////////////////
 namespace {
 inline const char* color_attribute_name() { return "aColor"; }
 inline const char* coverage_attribute_name() { return "aCoverage"; }
 inline const char* declared_color_output_name() { return "fsColorOut"; }
 inline const char* dual_source_output_name() { return "dualSourceOut"; }
 inline const char* sample_function_name(GrSLType type, GrGLSLGeneration glslGen) {
     if (kVec2f_GrSLType == type) {
         return glslGen >= k130_GrGLSLGeneration ? "texture" : "texture2D";
     } else {
         SkASSERT(kVec3f_GrSLType == type);
         return glslGen >= k130_GrGLSLGeneration ? "textureProj" : "texture2DProj";
     }
 }
 void append_texture_lookup(SkString* out,
                            GrGpuGL* gpu,
                            const char* samplerName,
                            const char* coordName,
                            uint32_t configComponentMask,
                            const char* swizzle,
                            GrSLType varyingType = kVec2f_GrSLType) {
     SkASSERT(NULL != coordName);
     out->appendf("%s(%s, %s)",
                  sample_function_name(varyingType, gpu->glslGeneration()),
                  samplerName,
                  coordName);
     char mangledSwizzle[5];
     // The swizzling occurs using texture params instead of shader-mangling if ARB_texture_swizzle
     // is available.
     if (!gpu->glCaps().textureSwizzleSupport() &&
         (kA_GrColorComponentFlag == configComponentMask)) {
         char alphaChar = gpu->glCaps().textureRedSupport() ? 'r' : 'a';
         int i;
         for (i = 0; '\0' != swizzle[i]; ++i) {
             mangledSwizzle[i] = alphaChar;
         }
         mangledSwizzle[i] ='\0';
         swizzle = mangledSwizzle;
     }
     // For shader prettiness we omit the swizzle rather than appending ".rgba".
     if (memcmp(swizzle, "rgba", 4)) {
         out->appendf(".%s", swizzle);
     }
 }
 }
 static const char kDstCopyColorName[] = "_dstColor";
 ///////////////////////////////////////////////////////////////////////////////
 GrGLShaderBuilder::GrGLShaderBuilder(GrGpuGL* gpu,
                                      GrGLUniformManager& uniformManager,
                                      const GrGLProgramDesc& desc)
     : fGpu(gpu)
     , fUniformManager(uniformManager)
     , fFSFeaturesAddedMask(0)
     , fFSInputs(kVarsPerBlock)
     , fFSOutputs(kMaxFSOutputs)
     , fUniforms(kVarsPerBlock)
     , fSetupFragPosition(false)
     , fHasCustomColorOutput(false)
     , fHasSecondaryOutput(false)
     , fTopLeftFragPosRead(kTopLeftFragPosRead_FragPosKey == desc.getHeader().fFragPosKey) {
     const GrGLProgramDesc::KeyHeader& header = desc.getHeader();
     // Emit code to read the dst copy textue if necessary.
     if (kNoDstRead_DstReadKey != header.fDstReadKey &&
         GrGLCaps::kNone_FBFetchType == fGpu->glCaps().fbFetchType()) {
         bool topDown = SkToBool(kTopLeftOrigin_DstReadKeyBit & header.fDstReadKey);
         const char* dstCopyTopLeftName;
         const char* dstCopyCoordScaleName;
         uint32_t configMask;
         if (SkToBool(kUseAlphaConfig_DstReadKeyBit & header.fDstReadKey)) {
             configMask = kA_GrColorComponentFlag;
         } else {
             configMask = kRGBA_GrColorComponentFlags;
         }
         fDstCopySamplerUniform = this->addUniform(kFragment_Visibility,
                                                   kSampler2D_GrSLType,
                                                   "DstCopySampler");
         fDstCopyTopLeftUniform = this->addUniform(kFragment_Visibility,
                                                   kVec2f_GrSLType,
                                                   "DstCopyUpperLeft",
                                                   &dstCopyTopLeftName);
         fDstCopyScaleUniform     = this->addUniform(kFragment_Visibility,
                                                     kVec2f_GrSLType,
                                                     "DstCopyCoordScale",
                                                     &dstCopyCoordScaleName);
         const char* fragPos = this->fragmentPosition();
         this->fsCodeAppend("\t// Read color from copy of the destination.\n");
         this->fsCodeAppendf("\tvec2 _dstTexCoord = (%s.xy - %s) * %s;\n",
                             fragPos, dstCopyTopLeftName, dstCopyCoordScaleName);
         if (!topDown) {
             this->fsCodeAppend("\t_dstTexCoord.y = 1.0 - _dstTexCoord.y;\n");
         }
         this->fsCodeAppendf("\tvec4 %s = ", kDstCopyColorName);
         append_texture_lookup(&fFSCode,
                               fGpu,
                               this->getUniformCStr(fDstCopySamplerUniform),
                               "_dstTexCoord",
                               configMask,
                               "rgba");
         this->fsCodeAppend(";\n\n");
     }
     if (GrGLProgramDesc::kUniform_ColorInput == header.fColorInput) {
         const char* name;
         fColorUniform = this->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                          kVec4f_GrSLType, "Color", &name);
         fInputColor = GrGLSLExpr4(name);
     } else if (GrGLProgramDesc::kSolidWhite_ColorInput == header.fColorInput) {
         fInputColor = GrGLSLExpr4(1);
     } else if (GrGLProgramDesc::kTransBlack_ColorInput == header.fColorInput) {
         fInputColor = GrGLSLExpr4(0);
     }
     if (GrGLProgramDesc::kUniform_ColorInput == header.fCoverageInput) {
         const char* name;
         fCoverageUniform = this->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                             kVec4f_GrSLType, "Coverage", &name);
         fInputCoverage = GrGLSLExpr4(name);
     } else if (GrGLProgramDesc::kSolidWhite_ColorInput == header.fCoverageInput) {
         fInputCoverage = GrGLSLExpr4(1);
     } else if (GrGLProgramDesc::kTransBlack_ColorInput == header.fCoverageInput) {
         fInputCoverage = GrGLSLExpr4(0);
     }
     if (k110_GrGLSLGeneration != fGpu->glslGeneration()) {
         fFSOutputs.push_back().set(kVec4f_GrSLType,
                                    GrGLShaderVar::kOut_TypeModifier,
                                    declared_color_output_name());
         fHasCustomColorOutput = true;
     }
 }
 bool GrGLShaderBuilder::enableFeature(GLSLFeature feature) {
     switch (feature) {
         case kStandardDerivatives_GLSLFeature:
             if (!fGpu->glCaps().shaderDerivativeSupport()) {
                 return false;
             }
             if (kGLES_GrGLStandard == fGpu->glStandard()) {
                 this->addFSFeature(1 << kStandardDerivatives_GLSLFeature,
                                    "GL_OES_standard_derivatives");
             }
             return true;
         default:
             GrCrash("Unexpected GLSLFeature requested.");
             return false;
     }
 }
 bool GrGLShaderBuilder::enablePrivateFeature(GLSLPrivateFeature feature) {
     switch (feature) {
         case kFragCoordConventions_GLSLPrivateFeature:
             if (!fGpu->glCaps().fragCoordConventionsSupport()) {
                 return false;
             }
             if (fGpu->glslGeneration() < k150_GrGLSLGeneration) {
                 this->addFSFeature(1 << kFragCoordConventions_GLSLPrivateFeature,
                                    "GL_ARB_fragment_coord_conventions");
             }
             return true;
         case kEXTShaderFramebufferFetch_GLSLPrivateFeature:
             if (GrGLCaps::kEXT_FBFetchType != fGpu->glCaps().fbFetchType()) {
                 return false;
             }
             this->addFSFeature(1 << kEXTShaderFramebufferFetch_GLSLPrivateFeature,
                                "GL_EXT_shader_framebuffer_fetch");
             return true;
         case kNVShaderFramebufferFetch_GLSLPrivateFeature:
             if (GrGLCaps::kNV_FBFetchType != fGpu->glCaps().fbFetchType()) {
                 return false;
             }
             this->addFSFeature(1 << kNVShaderFramebufferFetch_GLSLPrivateFeature,
                                "GL_NV_shader_framebuffer_fetch");
             return true;
         default:
             GrCrash("Unexpected GLSLPrivateFeature requested.");
             return false;
     }
 }
 void GrGLShaderBuilder::addFSFeature(uint32_t featureBit, const char* extensionName) {
     if (!(featureBit & fFSFeaturesAddedMask)) {
         fFSExtensions.appendf("#extension %s: require\n", extensionName);
         fFSFeaturesAddedMask |= featureBit;
     }
 }
 void GrGLShaderBuilder::nameVariable(SkString* out, char prefix, const char* name) {
     if ('\0' == prefix) {
         *out = name;
     } else {
         out->printf("%c%s", prefix, name);
     }
     if (fCodeStage.inStageCode()) {
         if (out->endsWith('_')) {
             // Names containing "__" are reserved.
             out->append("x");
         }
         out->appendf("_Stage%d", fCodeStage.stageIndex());
     }
 }
 const char* GrGLShaderBuilder::dstColor() {
     if (fCodeStage.inStageCode()) {
         const GrEffectRef& effect = *fCodeStage.effectStage()->getEffect();
         if (!effect->willReadDstColor()) {
             GrDebugCrash("GrGLEffect asked for dst color but its generating GrEffect "
                          "did not request access.");
             return "";
         }
     }
     static const char kFBFetchColorName[] = "gl_LastFragData[0]";
     GrGLCaps::FBFetchType fetchType = fGpu->glCaps().fbFetchType();
     if (GrGLCaps::kEXT_FBFetchType == fetchType) {
         SkAssertResult(this->enablePrivateFeature(kEXTShaderFramebufferFetch_GLSLPrivateFeature));
         return kFBFetchColorName;
     } else if (GrGLCaps::kNV_FBFetchType == fetchType) {
         SkAssertResult(this->enablePrivateFeature(kNVShaderFramebufferFetch_GLSLPrivateFeature));
         return kFBFetchColorName;
     } else if (fDstCopySamplerUniform.isValid()) {
         return kDstCopyColorName;
     } else {
         return "";
     }
 }
 void GrGLShaderBuilder::appendTextureLookup(SkString* out,
                                             const GrGLShaderBuilder::TextureSampler& sampler,
                                             const char* coordName,
                                             GrSLType varyingType) const {
     append_texture_lookup(out,
                           fGpu,
                           this->getUniformCStr(sampler.samplerUniform()),
                           coordName,
                           sampler.configComponentMask(),
                           sampler.swizzle(),
                           varyingType);
 }
 void GrGLShaderBuilder::fsAppendTextureLookup(const GrGLShaderBuilder::TextureSampler& sampler,
                                               const char* coordName,
                                               GrSLType varyingType) {
     this->appendTextureLookup(&fFSCode, sampler, coordName, varyingType);
 }
 void GrGLShaderBuilder::fsAppendTextureLookupAndModulate(
                                             const char* modulation,
                                             const GrGLShaderBuilder::TextureSampler& sampler,
                                             const char* coordName,
                                             GrSLType varyingType) {
     SkString lookup;
     this->appendTextureLookup(&lookup, sampler, coordName, varyingType);
     fFSCode.append((GrGLSLExpr4(modulation) * GrGLSLExpr4(lookup)).c_str());
 }
 GrGLShaderBuilder::DstReadKey GrGLShaderBuilder::KeyForDstRead(const GrTexture* dstCopy,
                                                                const GrGLCaps& caps) {
     uint32_t key = kYesDstRead_DstReadKeyBit;
     if (GrGLCaps::kNone_FBFetchType != caps.fbFetchType()) {
         return key;
     }
     SkASSERT(NULL != dstCopy);
     if (!caps.textureSwizzleSupport() && GrPixelConfigIsAlphaOnly(dstCopy->config())) {
         // The fact that the config is alpha-only must be considered when generating code.
         key |= kUseAlphaConfig_DstReadKeyBit;
     }
     if (kTopLeft_GrSurfaceOrigin == dstCopy->origin()) {
         key |= kTopLeftOrigin_DstReadKeyBit;
     }
     SkASSERT(static_cast<DstReadKey>(key) == key);
     return static_cast<DstReadKey>(key);
 }
 GrGLShaderBuilder::FragPosKey GrGLShaderBuilder::KeyForFragmentPosition(const GrRenderTarget* dst,
                                                                         const GrGLCaps&) {
     if (kTopLeft_GrSurfaceOrigin == dst->origin()) {
         return kTopLeftFragPosRead_FragPosKey;
     } else {
         return kBottomLeftFragPosRead_FragPosKey;
     }
 }
 const GrGLenum* GrGLShaderBuilder::GetTexParamSwizzle(GrPixelConfig config, const GrGLCaps& caps) {
     if (caps.textureSwizzleSupport() && GrPixelConfigIsAlphaOnly(config)) {
         if (caps.textureRedSupport()) {
             static const GrGLenum gRedSmear[] = { GR_GL_RED, GR_GL_RED, GR_GL_RED, GR_GL_RED };
             return gRedSmear;
         } else {
             static const GrGLenum gAlphaSmear[] = { GR_GL_ALPHA, GR_GL_ALPHA,
                                                     GR_GL_ALPHA, GR_GL_ALPHA };
             return gAlphaSmear;
         }
     } else {
         static const GrGLenum gStraight[] = { GR_GL_RED, GR_GL_GREEN, GR_GL_BLUE, GR_GL_ALPHA };
         return gStraight;
     }
 }
 GrGLUniformManager::UniformHandle GrGLShaderBuilder::addUniformArray(uint32_t visibility,
                                                                      GrSLType type,
                                                                      const char* name,
                                                                      int count,
                                                                      const char** outName) {
     SkASSERT(name && strlen(name));
     SkDEBUGCODE(static const uint32_t kVisibilityMask = kVertex_Visibility | kFragment_Visibility);
     SkASSERT(0 == (~kVisibilityMask & visibility));
     SkASSERT(0 != visibility);
     BuilderUniform& uni = fUniforms.push_back();
     UniformHandle h = GrGLUniformManager::UniformHandle::CreateFromUniformIndex(fUniforms.count() - 1);
     SkDEBUGCODE(UniformHandle h2 =)
     fUniformManager.appendUniform(type, count);
     // We expect the uniform manager to initially have no uniforms and that all uniforms are added
     // by this function. Therefore, the handles should match.
     SkASSERT(h2 == h);
     uni.fVariable.setType(type);
     uni.fVariable.setTypeModifier(GrGLShaderVar::kUniform_TypeModifier);
     this->nameVariable(uni.fVariable.accessName(), 'u', name);
     uni.fVariable.setArrayCount(count);
     uni.fVisibility = visibility;
     // If it is visible in both the VS and FS, the precision must match.
     // We declare a default FS precision, but not a default VS. So set the var
     // to use the default FS precision.
     if ((kVertex_Visibility | kFragment_Visibility) == visibility) {
         // the fragment and vertex precisions must match
         uni.fVariable.setPrecision(kDefaultFragmentPrecision);
     }
     if (NULL != outName) {
         *outName = uni.fVariable.c_str();
     }
     return h;
 }
 SkString GrGLShaderBuilder::ensureFSCoords2D(const TransformedCoordsArray& coords, int index) {
     if (kVec3f_GrSLType != coords[index].type()) {
         SkASSERT(kVec2f_GrSLType == coords[index].type());
         return coords[index].getName();
     }
     SkString coords2D("coords2D");
     if (0 != index) {
         coords2D.appendf("_%i", index);
     }
     this->fsCodeAppendf("\tvec2 %s = %s.xy / %s.z;",
                         coords2D.c_str(), coords[index].c_str(), coords[index].c_str());
     return coords2D;
 }
 const char* GrGLShaderBuilder::fragmentPosition() {
     if (fCodeStage.inStageCode()) {
         const GrEffectRef& effect = *fCodeStage.effectStage()->getEffect();
         if (!effect->willReadFragmentPosition()) {
             GrDebugCrash("GrGLEffect asked for frag position but its generating GrEffect "
                          "did not request access.");
             return "";
         }
     }
     // We only declare "gl_FragCoord" when we're in the case where we want to use layout qualifiers
     // to reverse y. Otherwise it isn't necessary and whether the "in" qualifier appears in the
     // declaration varies in earlier GLSL specs. So it is simpler to omit it.
     if (fTopLeftFragPosRead) {
         fSetupFragPosition = true;
         return "gl_FragCoord";
     } else if (fGpu->glCaps().fragCoordConventionsSupport()) {
         if (!fSetupFragPosition) {
             SkAssertResult(this->enablePrivateFeature(kFragCoordConventions_GLSLPrivateFeature));
             fFSInputs.push_back().set(kVec4f_GrSLType,
                                       GrGLShaderVar::kIn_TypeModifier,
                                       "gl_FragCoord",
                                       GrGLShaderVar::kDefault_Precision,
                                       GrGLShaderVar::kUpperLeft_Origin);
             fSetupFragPosition = true;
         }
         return "gl_FragCoord";
     } else {
         static const char* kCoordName = "fragCoordYDown";
         if (!fSetupFragPosition) {
             // temporarily change the stage index because we're inserting non-stage code.
             CodeStage::AutoStageRestore csar(&fCodeStage, NULL);
             SkASSERT(!fRTHeightUniform.isValid());
             const char* rtHeightName;
             fRTHeightUniform = this->addUniform(kFragment_Visibility,
                                                 kFloat_GrSLType,
                                                 "RTHeight",
                                                 &rtHeightName);
             this->fFSCode.prependf("\tvec4 %s = vec4(gl_FragCoord.x, %s - gl_FragCoord.y, gl_FragCoord.zw);\n",
                                    kCoordName, rtHeightName);
             fSetupFragPosition = true;
         }
         SkASSERT(fRTHeightUniform.isValid());
         return kCoordName;
     }
 }
 void GrGLShaderBuilder::fsEmitFunction(GrSLType returnType,
                                        const char* name,
                                        int argCnt,
                                        const GrGLShaderVar* args,
                                        const char* body,
                                        SkString* outName) {
     fFSFunctions.append(GrGLSLTypeString(returnType));
     this->nameVariable(outName, '\0', name);
     fFSFunctions.appendf(" %s", outName->c_str());
     fFSFunctions.append("(");
     for (int i = 0; i < argCnt; ++i) {
         args[i].appendDecl(this->ctxInfo(), &fFSFunctions);
         if (i < argCnt - 1) {
             fFSFunctions.append(", ");
         }
     }
     fFSFunctions.append(") {\n");
     fFSFunctions.append(body);
     fFSFunctions.append("}\n\n");
 }
 namespace {
 inline void append_default_precision_qualifier(GrGLShaderVar::Precision p,
                                                GrGLStandard standard,
                                                SkString* str) {
     // Desktop GLSL has added precision qualifiers but they don't do anything.
     if (kGLES_GrGLStandard == standard) {
         switch (p) {
             case GrGLShaderVar::kHigh_Precision:
                 str->append("precision highp float;\n");
                 break;
             case GrGLShaderVar::kMedium_Precision:
                 str->append("precision mediump float;\n");
                 break;
             case GrGLShaderVar::kLow_Precision:
                 str->append("precision lowp float;\n");
                 break;
             case GrGLShaderVar::kDefault_Precision:
                 GrCrash("Default precision now allowed.");
             default:
                 GrCrash("Unknown precision value.");
         }
     }
 }
 }
 void GrGLShaderBuilder::appendDecls(const VarArray& vars, SkString* out) const {
     for (int i = 0; i < vars.count(); ++i) {
         vars[i].appendDecl(this->ctxInfo(), out);
         out->append(";\n");
     }
 }
 void GrGLShaderBuilder::appendUniformDecls(ShaderVisibility visibility,
                                            SkString* out) const {
     for (int i = 0; i < fUniforms.count(); ++i) {
         if (fUniforms[i].fVisibility & visibility) {
             fUniforms[i].fVariable.appendDecl(this->ctxInfo(), out);
             out->append(";\n");
         }
     }
 }
 void GrGLShaderBuilder::createAndEmitEffects(GrGLProgramEffectsBuilder* programEffectsBuilder,
                                              const GrEffectStage* effectStages[],
                                              const EffectKey effectKeys[],
                                              int effectCnt,
                                              GrGLSLExpr4* fsInOutColor) {
     bool effectEmitted = false;
     GrGLSLExpr4 inColor = *fsInOutColor;
     GrGLSLExpr4 outColor;
     for (int e = 0; e < effectCnt; ++e) {
         SkASSERT(NULL != effectStages[e] && NULL != effectStages[e]->getEffect());
         const GrEffectStage& stage = *effectStages[e];
         CodeStage::AutoStageRestore csar(&fCodeStage, &stage);
         if (inColor.isZeros()) {
             SkString inColorName;
             // Effects have no way to communicate zeros, they treat an empty string as ones.
             this->nameVariable(&inColorName, '\0', "input");
             this->fsCodeAppendf("\tvec4 %s = %s;\n", inColorName.c_str(), inColor.c_str());
             inColor = inColorName;
         }
         // create var to hold stage result
         SkString outColorName;
         this->nameVariable(&outColorName, '\0', "output");
         this->fsCodeAppendf("\tvec4 %s;\n", outColorName.c_str());
         outColor = outColorName;
         programEffectsBuilder->emitEffect(stage,
                                           effectKeys[e],
                                           outColor.c_str(),
                                           inColor.isOnes() ? NULL : inColor.c_str(),
                                           fCodeStage.stageIndex());
         inColor = outColor;
         effectEmitted = true;
     }
     if (effectEmitted) {
         *fsInOutColor = outColor;
     }
 }
 const char* GrGLShaderBuilder::getColorOutputName() const {
     return fHasCustomColorOutput ? declared_color_output_name() : "gl_FragColor";
 }
 const char* GrGLShaderBuilder::enableSecondaryOutput() {
     if (!fHasSecondaryOutput) {
         fFSOutputs.push_back().set(kVec4f_GrSLType,
                                    GrGLShaderVar::kOut_TypeModifier,
                                    dual_source_output_name());
         fHasSecondaryOutput = true;
     }
     return dual_source_output_name();
 }
 bool GrGLShaderBuilder::finish(GrGLuint* outProgramId) {
     SK_TRACE_EVENT0("GrGLShaderBuilder::finish");
     GrGLuint programId = 0;
     GL_CALL_RET(programId, CreateProgram());
     if (!programId) {
         return false;
     }
     SkTDArray<GrGLuint> shadersToDelete;
     if (!this->compileAndAttachShaders(programId, &shadersToDelete)) {
         GL_CALL(DeleteProgram(programId));
         return false;
     }
     this->bindProgramLocations(programId);
     if (fUniformManager.isUsingBindUniform()) {
       fUniformManager.getUniformLocations(programId, fUniforms);
     }
     GL_CALL(LinkProgram(programId));
     // Calling GetProgramiv is expensive in Chromium. Assume success in release builds.
     bool checkLinked = !fGpu->ctxInfo().isChromium();
 #ifdef SK_DEBUG
     checkLinked = true;
 #endif
     if (checkLinked) {
         GrGLint linked = GR_GL_INIT_ZERO;
         GL_CALL(GetProgramiv(programId, GR_GL_LINK_STATUS, &linked));
         if (!linked) {
             GrGLint infoLen = GR_GL_INIT_ZERO;
             GL_CALL(GetProgramiv(programId, GR_GL_INFO_LOG_LENGTH, &infoLen));
             SkAutoMalloc log(sizeof(char)*(infoLen+1));  // outside if for debugger
             if (infoLen > 0) {
                 // retrieve length even though we don't need it to workaround
                 // bug in chrome cmd buffer param validation.
                 GrGLsizei length = GR_GL_INIT_ZERO;
                 GL_CALL(GetProgramInfoLog(programId,
                                           infoLen+1,
                                           &length,
                                           (char*)log.get()));
                 GrPrintf((char*)log.get());
             }
             SkDEBUGFAIL("Error linking program");
             GL_CALL(DeleteProgram(programId));
             return false;
         }
     }
     if (!fUniformManager.isUsingBindUniform()) {
       fUniformManager.getUniformLocations(programId, fUniforms);
     }
     for (int i = 0; i < shadersToDelete.count(); ++i) {
       GL_CALL(DeleteShader(shadersToDelete[i]));
     }
     *outProgramId = programId;
     return true;
 }
 // Compiles a GL shader and attaches it to a program. Returns the shader ID if
 // successful, or 0 if not.
 static GrGLuint attach_shader(const GrGLContext& glCtx,
                               GrGLuint programId,
                               GrGLenum type,
                               const SkString& shaderSrc) {
     const GrGLInterface* gli = glCtx.interface();
     GrGLuint shaderId;
     GR_GL_CALL_RET(gli, shaderId, CreateShader(type));
     if (0 == shaderId) {
         return 0;
     }
     const GrGLchar* sourceStr = shaderSrc.c_str();
     GrGLint sourceLength = static_cast<GrGLint>(shaderSrc.size());
     GR_GL_CALL(gli, ShaderSource(shaderId, 1, &sourceStr, &sourceLength));
     GR_GL_CALL(gli, CompileShader(shaderId));
     // Calling GetShaderiv in Chromium is quite expensive. Assume success in release builds.
     bool checkCompiled = !glCtx.isChromium();
 #ifdef SK_DEBUG
     checkCompiled = true;
 #endif
     if (checkCompiled) {
         GrGLint compiled = GR_GL_INIT_ZERO;
         GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_COMPILE_STATUS, &compiled));
         if (!compiled) {
             GrGLint infoLen = GR_GL_INIT_ZERO;
             GR_GL_CALL(gli, GetShaderiv(shaderId, GR_GL_INFO_LOG_LENGTH, &infoLen));
             SkAutoMalloc log(sizeof(char)*(infoLen+1)); // outside if for debugger
             if (infoLen > 0) {
                 // retrieve length even though we don't need it to workaround bug in Chromium cmd
                 // buffer param validation.
                 GrGLsizei length = GR_GL_INIT_ZERO;
                 GR_GL_CALL(gli, GetShaderInfoLog(shaderId, infoLen+1,
                                                  &length, (char*)log.get()));
                 GrPrintf(shaderSrc.c_str());
                 GrPrintf("\n%s", log.get());
             }
             SkDEBUGFAIL("Shader compilation failed!");
             GR_GL_CALL(gli, DeleteShader(shaderId));
             return 0;
         }
     }
     if (c_PrintShaders) {
         GrPrintf(shaderSrc.c_str());
         GrPrintf("\n");
     }
     // Attach the shader, but defer deletion until after we have linked the program.
     // This works around a bug in the Android emulator's GLES2 wrapper which
     // will immediately delete the shader object and free its memory even though it's
     // attached to a program, which then causes glLinkProgram to fail.
     GR_GL_CALL(gli, AttachShader(programId, shaderId));
     return shaderId;
 }
 bool GrGLShaderBuilder::compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds) const {
     SkString fragShaderSrc(GrGetGLSLVersionDecl(this->ctxInfo()));
     fragShaderSrc.append(fFSExtensions);
     append_default_precision_qualifier(kDefaultFragmentPrecision,
                                        fGpu->glStandard(),
                                        &fragShaderSrc);
     this->appendUniformDecls(kFragment_Visibility, &fragShaderSrc);
     this->appendDecls(fFSInputs, &fragShaderSrc);
     // We shouldn't have declared outputs on 1.10
     SkASSERT(k110_GrGLSLGeneration != fGpu->glslGeneration() || fFSOutputs.empty());
     this->appendDecls(fFSOutputs, &fragShaderSrc);
     fragShaderSrc.append(fFSFunctions);
     fragShaderSrc.append("void main() {\n");
     fragShaderSrc.append(fFSCode);
     fragShaderSrc.append("}\n");
     GrGLuint fragShaderId = attach_shader(fGpu->glContext(), programId, GR_GL_FRAGMENT_SHADER, fragShaderSrc);
     if (!fragShaderId) {
         return false;
     }
     *shaderIds->append() = fragShaderId;
     return true;
 }
 void GrGLShaderBuilder::bindProgramLocations(GrGLuint programId) const {
     if (fHasCustomColorOutput) {
         GL_CALL(BindFragDataLocation(programId, 0, declared_color_output_name()));
     }
     if (fHasSecondaryOutput) {
         GL_CALL(BindFragDataLocationIndexed(programId, 0, 1, dual_source_output_name()));
     }
 }
 const GrGLContextInfo& GrGLShaderBuilder::ctxInfo() const {
     return fGpu->ctxInfo();
 }
 ////////////////////////////////////////////////////////////////////////////////
 GrGLFullShaderBuilder::GrGLFullShaderBuilder(GrGpuGL* gpu,
                                              GrGLUniformManager& uniformManager,
                                              const GrGLProgramDesc& desc)
     : INHERITED(gpu, uniformManager, desc)
     , fDesc(desc)
     , fVSAttrs(kVarsPerBlock)
     , fVSOutputs(kVarsPerBlock)
     , fGSInputs(kVarsPerBlock)
     , fGSOutputs(kVarsPerBlock) {
     const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
     fPositionVar = &fVSAttrs.push_back();
     fPositionVar->set(kVec2f_GrSLType, GrGLShaderVar::kAttribute_TypeModifier, "aPosition");
     if (-1 != header.fLocalCoordAttributeIndex) {
         fLocalCoordsVar = &fVSAttrs.push_back();
         fLocalCoordsVar->set(kVec2f_GrSLType,
                              GrGLShaderVar::kAttribute_TypeModifier,
                              "aLocalCoords");
     } else {
         fLocalCoordsVar = fPositionVar;
     }
     const char* viewMName;
     fViewMatrixUniform = this->addUniform(GrGLShaderBuilder::kVertex_Visibility,
                                           kMat33f_GrSLType, "ViewM", &viewMName);
     this->vsCodeAppendf("\tvec3 pos3 = %s * vec3(%s, 1);\n"
                         "\tgl_Position = vec4(pos3.xy, 0, pos3.z);\n",
                         viewMName, fPositionVar->c_str());
     // we output point size in the GS if present
     if (header.fEmitsPointSize
 #if GR_GL_EXPERIMENTAL_GS
         && !header.fExperimentalGS
 #endif
         ) {
         this->vsCodeAppend("\tgl_PointSize = 1.0;\n");
     }
     if (GrGLProgramDesc::kAttribute_ColorInput == header.fColorInput) {
         this->addAttribute(kVec4f_GrSLType, color_attribute_name());
         const char *vsName, *fsName;
         this->addVarying(kVec4f_GrSLType, "Color", &vsName, &fsName);
         this->vsCodeAppendf("\t%s = %s;\n", vsName, color_attribute_name());
         this->setInputColor(fsName);
     }
     if (GrGLProgramDesc::kAttribute_ColorInput == header.fCoverageInput) {
         this->addAttribute(kVec4f_GrSLType, coverage_attribute_name());
         const char *vsName, *fsName;
         this->addVarying(kVec4f_GrSLType, "Coverage", &vsName, &fsName);
         this->vsCodeAppendf("\t%s = %s;\n", vsName, coverage_attribute_name());
         this->setInputCoverage(fsName);
     }
 }
 bool GrGLFullShaderBuilder::addAttribute(GrSLType type, const char* name) {
     for (int i = 0; i < fVSAttrs.count(); ++i) {
         const GrGLShaderVar& attr = fVSAttrs[i];
         // if attribute already added, don't add it again
         if (attr.getName().equals(name)) {
             SkASSERT(attr.getType() == type);
             return false;
         }
     }
     fVSAttrs.push_back().set(type,
                              GrGLShaderVar::kAttribute_TypeModifier,
                              name);
     return true;
 }
 bool GrGLFullShaderBuilder::addEffectAttribute(int attributeIndex,
                                                GrSLType type,
                                                const SkString& name) {
     if (!this->addAttribute(type, name.c_str())) {
         return false;
     }
     fEffectAttributes.push_back().set(attributeIndex, name);
     return true;
 }
 void GrGLFullShaderBuilder::addVarying(GrSLType type,
                                        const char* name,
                                        const char** vsOutName,
                                        const char** fsInName) {
     fVSOutputs.push_back();
     fVSOutputs.back().setType(type);
     fVSOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier);
     this->nameVariable(fVSOutputs.back().accessName(), 'v', name);
     if (vsOutName) {
         *vsOutName = fVSOutputs.back().getName().c_str();
     }
     // input to FS comes either from VS or GS
     const SkString* fsName;
 #if GR_GL_EXPERIMENTAL_GS
     if (fDesc.getHeader().fExperimentalGS) {
         // if we have a GS take each varying in as an array
         // and output as non-array.
         fGSInputs.push_back();
         fGSInputs.back().setType(type);
         fGSInputs.back().setTypeModifier(GrGLShaderVar::kVaryingIn_TypeModifier);
         fGSInputs.back().setUnsizedArray();
         *fGSInputs.back().accessName() = fVSOutputs.back().getName();
         fGSOutputs.push_back();
         fGSOutputs.back().setType(type);
         fGSOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier);
         this->nameVariable(fGSOutputs.back().accessName(), 'g', name);
         fsName = fGSOutputs.back().accessName();
     } else
 #endif
     {
         fsName = fVSOutputs.back().accessName();
     }
     this->fsInputAppend().set(type, GrGLShaderVar::kVaryingIn_TypeModifier, *fsName);
     if (fsInName) {
         *fsInName = fsName->c_str();
     }
 }
 const SkString* GrGLFullShaderBuilder::getEffectAttributeName(int attributeIndex) const {
     const AttributePair* attribEnd = fEffectAttributes.end();
     for (const AttributePair* attrib = fEffectAttributes.begin(); attrib != attribEnd; ++attrib) {
         if (attrib->fIndex == attributeIndex) {
             return &attrib->fName;
         }
     }
     return NULL;
 }
 GrGLProgramEffects* GrGLFullShaderBuilder::createAndEmitEffects(
         const GrEffectStage* effectStages[],
         const EffectKey effectKeys[],
         int effectCnt,
         GrGLSLExpr4* inOutFSColor) {
     GrGLVertexProgramEffectsBuilder programEffectsBuilder(this, effectCnt);
     this->INHERITED::createAndEmitEffects(&programEffectsBuilder,
                                           effectStages,
                                           effectKeys,
                                           effectCnt,
                                           inOutFSColor);
     return programEffectsBuilder.finish();
 }
 bool GrGLFullShaderBuilder::compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds) const {
     const GrGLContext& glCtx = this->gpu()->glContext();
     SkString vertShaderSrc(GrGetGLSLVersionDecl(this->ctxInfo()));
     this->appendUniformDecls(kVertex_Visibility, &vertShaderSrc);
     this->appendDecls(fVSAttrs, &vertShaderSrc);
     this->appendDecls(fVSOutputs, &vertShaderSrc);
     vertShaderSrc.append("void main() {\n");
     vertShaderSrc.append(fVSCode);
     vertShaderSrc.append("}\n");
     GrGLuint vertShaderId = attach_shader(glCtx, programId, GR_GL_VERTEX_SHADER, vertShaderSrc);
     if (!vertShaderId) {
         return false;
     }
     *shaderIds->append() = vertShaderId;
 #if GR_GL_EXPERIMENTAL_GS
     if (fDesc.getHeader().fExperimentalGS) {
         SkASSERT(this->ctxInfo().glslGeneration() >= k150_GrGLSLGeneration);
         SkString geomShaderSrc(GrGetGLSLVersionDecl(this->ctxInfo()));
         geomShaderSrc.append("layout(triangles) in;\n"
                              "layout(triangle_strip, max_vertices = 6) out;\n");
         this->appendDecls(fGSInputs, &geomShaderSrc);
         this->appendDecls(fGSOutputs, &geomShaderSrc);
         geomShaderSrc.append("void main() {\n");
         geomShaderSrc.append("\tfor (int i = 0; i < 3; ++i) {\n"
                              "\t\tgl_Position = gl_in[i].gl_Position;\n");
         if (fDesc.getHeader().fEmitsPointSize) {
             geomShaderSrc.append("\t\tgl_PointSize = 1.0;\n");
         }
         SkASSERT(fGSInputs.count() == fGSOutputs.count());
         for (int i = 0; i < fGSInputs.count(); ++i) {
             geomShaderSrc.appendf("\t\t%s = %s[i];\n",
                                   fGSOutputs[i].getName().c_str(),
                                   fGSInputs[i].getName().c_str());
         }
         geomShaderSrc.append("\t\tEmitVertex();\n"
                              "\t}\n"
                              "\tEndPrimitive();\n");
         geomShaderSrc.append("}\n");
         GrGLuint geomShaderId = attach_shader(glCtx, programId, GR_GL_GEOMETRY_SHADER, geomShaderSrc);
         if (!geomShaderId) {
             return false;
         }
         *shaderIds->append() = geomShaderId;
     }
 #endif
     return this->INHERITED::compileAndAttachShaders(programId, shaderIds);
 }
 void GrGLFullShaderBuilder::bindProgramLocations(GrGLuint programId) const {
     this->INHERITED::bindProgramLocations(programId);
     const GrGLProgramDesc::KeyHeader& header = fDesc.getHeader();
     // Bind the attrib locations to same values for all shaders
     SkASSERT(-1 != header.fPositionAttributeIndex);
     GL_CALL(BindAttribLocation(programId,
                                header.fPositionAttributeIndex,
                                fPositionVar->c_str()));
     if (-1 != header.fLocalCoordAttributeIndex) {
         GL_CALL(BindAttribLocation(programId,
                                    header.fLocalCoordAttributeIndex,
                                    fLocalCoordsVar->c_str()));
     }
     if (-1 != header.fColorAttributeIndex) {
         GL_CALL(BindAttribLocation(programId,
                                    header.fColorAttributeIndex,
                                    color_attribute_name()));
     }
     if (-1 != header.fCoverageAttributeIndex) {
         GL_CALL(BindAttribLocation(programId,
                                    header.fCoverageAttributeIndex,
                                    coverage_attribute_name()));
     }
     const AttributePair* attribEnd = fEffectAttributes.end();
     for (const AttributePair* attrib = fEffectAttributes.begin(); attrib != attribEnd; ++attrib) {
          GL_CALL(BindAttribLocation(programId, attrib->fIndex, attrib->fName.c_str()));
     }
 }
 ////////////////////////////////////////////////////////////////////////////////
 GrGLFragmentOnlyShaderBuilder::GrGLFragmentOnlyShaderBuilder(GrGpuGL* gpu,
                                                              GrGLUniformManager& uniformManager,
                                                              const GrGLProgramDesc& desc)
     : INHERITED(gpu, uniformManager, desc)
     , fNumTexCoordSets(0) {
     SkASSERT(!desc.getHeader().fHasVertexCode);
     SkASSERT(gpu->glCaps().fixedFunctionSupport());
     SkASSERT(gpu->glCaps().pathRenderingSupport());
     SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fColorInput);
     SkASSERT(GrGLProgramDesc::kAttribute_ColorInput != desc.getHeader().fCoverageInput);
 }
 int GrGLFragmentOnlyShaderBuilder::addTexCoordSets(int count) {
     int firstFreeCoordSet = fNumTexCoordSets;
     fNumTexCoordSets += count;
     SkASSERT(gpu()->glCaps().maxFixedFunctionTextureCoords() >= fNumTexCoordSets);
     return firstFreeCoordSet;
 }
 GrGLProgramEffects* GrGLFragmentOnlyShaderBuilder::createAndEmitEffects(
         const GrEffectStage* effectStages[],
         const EffectKey effectKeys[],
         int effectCnt,
         GrGLSLExpr4* inOutFSColor) {
     GrGLTexGenProgramEffectsBuilder texGenEffectsBuilder(this, effectCnt);
     this->INHERITED::createAndEmitEffects(&texGenEffectsBuilder,
                                           effectStages,
                                           effectKeys,
                                           effectCnt,
                                           inOutFSColor);
     return texGenEffectsBuilder.finish();
 }

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/gl/GrGLShaderBuilder.cpp@129ffea94266 (annotated)

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