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

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

gfx/skia/trunk/src/gpu/gl/GrGLProgramDesc.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 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLProgramDesc.h"
 #include "GrBackendEffectFactory.h"
 #include "GrDrawEffect.h"
 #include "GrEffect.h"
 #include "GrGLShaderBuilder.h"
 #include "GrGpuGL.h"
 #include "SkChecksum.h"
 namespace {
 inline GrGLEffect::EffectKey get_key_and_update_stats(const GrEffectStage& stage,
                                                       const GrGLCaps& caps,
                                                       bool useExplicitLocalCoords,
                                                       bool* setTrueIfReadsDst,
                                                       bool* setTrueIfReadsPos,
                                                       bool* setTrueIfHasVertexCode) {
     const GrEffectRef& effect = *stage.getEffect();
     const GrBackendEffectFactory& factory = effect->getFactory();
     GrDrawEffect drawEffect(stage, useExplicitLocalCoords);
     if (effect->willReadDstColor()) {
         *setTrueIfReadsDst = true;
     }
     if (effect->willReadFragmentPosition()) {
         *setTrueIfReadsPos = true;
     }
     if (effect->hasVertexCode()) {
         *setTrueIfHasVertexCode = true;
     }
     return factory.glEffectKey(drawEffect, caps);
 }
 }
 void GrGLProgramDesc::Build(const GrDrawState& drawState,
                             bool isPoints,
                             GrDrawState::BlendOptFlags blendOpts,
                             GrBlendCoeff srcCoeff,
                             GrBlendCoeff dstCoeff,
                             const GrGpuGL* gpu,
                             const GrDeviceCoordTexture* dstCopy,
                             SkTArray<const GrEffectStage*, true>* colorStages,
                             SkTArray<const GrEffectStage*, true>* coverageStages,
                             GrGLProgramDesc* desc) {
     colorStages->reset();
     coverageStages->reset();
     // This should already have been caught
     SkASSERT(!(GrDrawState::kSkipDraw_BlendOptFlag & blendOpts));
     bool skipCoverage = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
     bool skipColor = SkToBool(blendOpts & (GrDrawState::kEmitTransBlack_BlendOptFlag |
                                            GrDrawState::kEmitCoverage_BlendOptFlag));
     int firstEffectiveColorStage = 0;
     bool inputColorIsUsed = true;
     if (!skipColor) {
         firstEffectiveColorStage = drawState.numColorStages();
         while (firstEffectiveColorStage > 0 && inputColorIsUsed) {
             --firstEffectiveColorStage;
             const GrEffect* effect = drawState.getColorStage(firstEffectiveColorStage).getEffect()->get();
             inputColorIsUsed = effect->willUseInputColor();
         }
     }
     int firstEffectiveCoverageStage = 0;
     bool inputCoverageIsUsed = true;
     if (!skipCoverage) {
         firstEffectiveCoverageStage = drawState.numCoverageStages();
         while (firstEffectiveCoverageStage > 0 && inputCoverageIsUsed) {
             --firstEffectiveCoverageStage;
             const GrEffect* effect = drawState.getCoverageStage(firstEffectiveCoverageStage).getEffect()->get();
             inputCoverageIsUsed = effect->willUseInputColor();
         }
     }
     // The descriptor is used as a cache key. Thus when a field of the
     // descriptor will not affect program generation (because of the attribute
     // bindings in use or other descriptor field settings) it should be set
     // to a canonical value to avoid duplicate programs with different keys.
     bool requiresColorAttrib = !skipColor && drawState.hasColorVertexAttribute();
     bool requiresCoverageAttrib = !skipCoverage && drawState.hasCoverageVertexAttribute();
     // we only need the local coords if we're actually going to generate effect code
     bool requiresLocalCoordAttrib = !(skipCoverage  && skipColor) &&
                                     drawState.hasLocalCoordAttribute();
     bool colorIsTransBlack = SkToBool(blendOpts & GrDrawState::kEmitTransBlack_BlendOptFlag);
     bool colorIsSolidWhite = (blendOpts & GrDrawState::kEmitCoverage_BlendOptFlag) ||
                              (!requiresColorAttrib && 0xffffffff == drawState.getColor()) ||
                              (!inputColorIsUsed);
     int numEffects = (skipColor ? 0 : (drawState.numColorStages() - firstEffectiveColorStage)) +
                      (skipCoverage ? 0 : (drawState.numCoverageStages() - firstEffectiveCoverageStage));
     size_t newKeyLength = KeyLength(numEffects);
     bool allocChanged;
     desc->fKey.reset(newKeyLength, SkAutoMalloc::kAlloc_OnShrink, &allocChanged);
     if (allocChanged || !desc->fInitialized) {
         // make sure any padding in the header is zero if we we haven't used this allocation before.
         memset(desc->header(), 0, kHeaderSize);
     }
     // write the key length
     *desc->atOffset<uint32_t, kLengthOffset>() = SkToU32(newKeyLength);
     KeyHeader* header = desc->header();
     EffectKey* effectKeys = desc->effectKeys();
     int currEffectKey = 0;
     bool readsDst = false;
     bool readFragPosition = false;
     bool hasVertexCode = false;
     if (!skipColor) {
         for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
             effectKeys[currEffectKey++] =
                 get_key_and_update_stats(drawState.getColorStage(s), gpu->glCaps(),
                                          requiresLocalCoordAttrib, &readsDst, &readFragPosition,
                                          &hasVertexCode);
         }
     }
     if (!skipCoverage) {
         for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
             effectKeys[currEffectKey++] =
                 get_key_and_update_stats(drawState.getCoverageStage(s), gpu->glCaps(),
                                          requiresLocalCoordAttrib, &readsDst, &readFragPosition,
                                          &hasVertexCode);
         }
     }
     header->fHasVertexCode = hasVertexCode || requiresLocalCoordAttrib;
     header->fEmitsPointSize = isPoints;
     // Currently the experimental GS will only work with triangle prims (and it doesn't do anything
     // other than pass through values from the VS to the FS anyway).
 #if GR_GL_EXPERIMENTAL_GS
 #if 0
     header->fExperimentalGS = gpu->caps().geometryShaderSupport();
 #else
     header->fExperimentalGS = false;
 #endif
 #endif
     bool defaultToUniformInputs = GR_GL_NO_CONSTANT_ATTRIBUTES || gpu->caps()->pathRenderingSupport();
     if (colorIsTransBlack) {
         header->fColorInput = kTransBlack_ColorInput;
     } else if (colorIsSolidWhite) {
         header->fColorInput = kSolidWhite_ColorInput;
     } else if (defaultToUniformInputs && !requiresColorAttrib) {
         header->fColorInput = kUniform_ColorInput;
     } else {
         header->fColorInput = kAttribute_ColorInput;
         header->fHasVertexCode = true;
     }
     bool covIsSolidWhite = !requiresCoverageAttrib && 0xffffffff == drawState.getCoverageColor();
     if (skipCoverage) {
         header->fCoverageInput = kTransBlack_ColorInput;
     } else if (covIsSolidWhite || !inputCoverageIsUsed) {
         header->fCoverageInput = kSolidWhite_ColorInput;
     } else if (defaultToUniformInputs && !requiresCoverageAttrib) {
         header->fCoverageInput = kUniform_ColorInput;
     } else {
         header->fCoverageInput = kAttribute_ColorInput;
         header->fHasVertexCode = true;
     }
     if (readsDst) {
         SkASSERT(NULL != dstCopy || gpu->caps()->dstReadInShaderSupport());
         const GrTexture* dstCopyTexture = NULL;
         if (NULL != dstCopy) {
             dstCopyTexture = dstCopy->texture();
         }
         header->fDstReadKey = GrGLShaderBuilder::KeyForDstRead(dstCopyTexture, gpu->glCaps());
         SkASSERT(0 != header->fDstReadKey);
     } else {
         header->fDstReadKey = 0;
     }
     if (readFragPosition) {
         header->fFragPosKey = GrGLShaderBuilder::KeyForFragmentPosition(drawState.getRenderTarget(),
                                                                       gpu->glCaps());
     } else {
         header->fFragPosKey = 0;
     }
     // Record attribute indices
     header->fPositionAttributeIndex = drawState.positionAttributeIndex();
     header->fLocalCoordAttributeIndex = drawState.localCoordAttributeIndex();
     // For constant color and coverage we need an attribute with an index beyond those already set
     int availableAttributeIndex = drawState.getVertexAttribCount();
     if (requiresColorAttrib) {
         header->fColorAttributeIndex = drawState.colorVertexAttributeIndex();
     } else if (GrGLProgramDesc::kAttribute_ColorInput == header->fColorInput) {
         SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
         header->fColorAttributeIndex = availableAttributeIndex;
         availableAttributeIndex++;
     } else {
         header->fColorAttributeIndex = -1;
     }
     if (requiresCoverageAttrib) {
         header->fCoverageAttributeIndex = drawState.coverageVertexAttributeIndex();
     } else if (GrGLProgramDesc::kAttribute_ColorInput == header->fCoverageInput) {
         SkASSERT(availableAttributeIndex < GrDrawState::kMaxVertexAttribCnt);
         header->fCoverageAttributeIndex = availableAttributeIndex;
     } else {
         header->fCoverageAttributeIndex = -1;
     }
     // Here we deal with whether/how we handle color and coverage separately.
     // Set this default and then possibly change our mind if there is coverage.
     header->fCoverageOutput = kModulate_CoverageOutput;
     // If we do have coverage determine whether it matters.
     bool separateCoverageFromColor = false;
     if (!drawState.isCoverageDrawing() && !skipCoverage &&
         (drawState.numCoverageStages() > 0 || requiresCoverageAttrib)) {
         if (gpu->caps()->dualSourceBlendingSupport() &&
             !(blendOpts & (GrDrawState::kEmitCoverage_BlendOptFlag |
                            GrDrawState::kCoverageAsAlpha_BlendOptFlag))) {
             if (kZero_GrBlendCoeff == dstCoeff) {
                 // write the coverage value to second color
                 header->fCoverageOutput =  kSecondaryCoverage_CoverageOutput;
                 separateCoverageFromColor = true;
             } else if (kSA_GrBlendCoeff == dstCoeff) {
                 // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
                 header->fCoverageOutput = kSecondaryCoverageISA_CoverageOutput;
                 separateCoverageFromColor = true;
             } else if (kSC_GrBlendCoeff == dstCoeff) {
                 // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
                 header->fCoverageOutput = kSecondaryCoverageISC_CoverageOutput;
                 separateCoverageFromColor = true;
             }
         } else if (readsDst &&
                    kOne_GrBlendCoeff == srcCoeff &&
                    kZero_GrBlendCoeff == dstCoeff) {
             header->fCoverageOutput = kCombineWithDst_CoverageOutput;
             separateCoverageFromColor = true;
         }
     }
     if (!skipColor) {
         for (int s = firstEffectiveColorStage; s < drawState.numColorStages(); ++s) {
             colorStages->push_back(&drawState.getColorStage(s));
         }
     }
     if (!skipCoverage) {
         SkTArray<const GrEffectStage*, true>* array;
         if (separateCoverageFromColor) {
             array = coverageStages;
         } else {
             array = colorStages;
         }
         for (int s = firstEffectiveCoverageStage; s < drawState.numCoverageStages(); ++s) {
             array->push_back(&drawState.getCoverageStage(s));
         }
     }
     header->fColorEffectCnt = colorStages->count();
     header->fCoverageEffectCnt = coverageStages->count();
     *desc->checksum() = 0;
     *desc->checksum() = SkChecksum::Compute(reinterpret_cast<uint32_t*>(desc->fKey.get()),
                                             newKeyLength);
     desc->fInitialized = true;
 }
 GrGLProgramDesc& GrGLProgramDesc::operator= (const GrGLProgramDesc& other) {
     fInitialized = other.fInitialized;
     if (fInitialized) {
         size_t keyLength = other.keyLength();
         fKey.reset(keyLength);
         memcpy(fKey.get(), other.fKey.get(), keyLength);
     }
     return *this;
 }

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

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