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

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

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

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.
  */
 #ifndef GrGLProgramDesc_DEFINED
 #define GrGLProgramDesc_DEFINED
 #include "GrGLEffect.h"
 #include "GrDrawState.h"
 #include "GrGLShaderBuilder.h"
 class GrGpuGL;
 #ifdef SK_DEBUG
   // Optionally compile the experimental GS code. Set to SK_DEBUG so that debug build bots will
   // execute the code.
   #define GR_GL_EXPERIMENTAL_GS 1
 #else
   #define GR_GL_EXPERIMENTAL_GS 0
 #endif
 /** This class describes a program to generate. It also serves as a program cache key. Very little
     of this is GL-specific. There is the generation of GrGLEffect::EffectKeys and the dst-read part
     of the key set by GrGLShaderBuilder. If the interfaces that set those portions were abstracted
     to be API-neutral then so could this class. */
 class GrGLProgramDesc {
 public:
     GrGLProgramDesc() : fInitialized(false) {}
     GrGLProgramDesc(const GrGLProgramDesc& desc) { *this = desc; }
     // Returns this as a uint32_t array to be used as a key in the program cache.
     const uint32_t* asKey() const {
         SkASSERT(fInitialized);
         return reinterpret_cast<const uint32_t*>(fKey.get());
     }
     // Gets the number of bytes in asKey(). It will be a 4-byte aligned value. When comparing two
     // keys the size of either key can be used with memcmp() since the lengths themselves begin the
     // keys and thus the memcmp will exit early if the keys are of different lengths.
     uint32_t keyLength() const { return *this->atOffset<uint32_t, kLengthOffset>(); }
     // Gets the a checksum of the key. Can be used as a hash value for a fast lookup in a cache.
     uint32_t getChecksum() const { return *this->atOffset<uint32_t, kChecksumOffset>(); }
     // For unit testing.
     void setRandom(SkRandom*,
                    const GrGpuGL* gpu,
                    const GrRenderTarget* dummyDstRenderTarget,
                    const GrTexture* dummyDstCopyTexture,
                    const GrEffectStage* stages[],
                    int numColorStages,
                    int numCoverageStages,
                    int currAttribIndex);
     /**
      * Builds a program descriptor from a GrDrawState. Whether the primitive type is points, the
      * output of GrDrawState::getBlendOpts, and the caps of the GrGpuGL are also inputs. It also
      * outputs the color and coverage stages referenced by the generated descriptor. This may
      * not contain all stages from the draw state and coverage stages from the drawState may
      * be treated as color stages in the output.
      */
     static void Build(const GrDrawState&,
                       bool isPoints,
                       GrDrawState::BlendOptFlags,
                       GrBlendCoeff srcCoeff,
                       GrBlendCoeff dstCoeff,
                       const GrGpuGL* gpu,
                       const GrDeviceCoordTexture* dstCopy,
                       SkTArray<const GrEffectStage*, true>* outColorStages,
                       SkTArray<const GrEffectStage*, true>* outCoverageStages,
                       GrGLProgramDesc* outDesc);
     int numColorEffects() const {
         SkASSERT(fInitialized);
         return this->getHeader().fColorEffectCnt;
     }
     int numCoverageEffects() const {
         SkASSERT(fInitialized);
         return this->getHeader().fCoverageEffectCnt;
     }
     int numTotalEffects() const { return this->numColorEffects() + this->numCoverageEffects(); }
     GrGLProgramDesc& operator= (const GrGLProgramDesc& other);
     bool operator== (const GrGLProgramDesc& other) const {
         SkASSERT(fInitialized && other.fInitialized);
         // The length is masked as a hint to the compiler that the address will be 4 byte aligned.
         return 0 == memcmp(this->asKey(), other.asKey(), this->keyLength() & ~0x3);
     }
     bool operator!= (const GrGLProgramDesc& other) const {
         return !(*this == other);
     }
     static bool Less(const GrGLProgramDesc& a, const GrGLProgramDesc& b) {
         return memcmp(a.asKey(), b.asKey(), a.keyLength() & ~0x3) < 0;
     }
 private:
     // Specifies where the initial color comes from before the stages are applied.
     enum ColorInput {
         kSolidWhite_ColorInput,
         kTransBlack_ColorInput,
         kAttribute_ColorInput,
         kUniform_ColorInput,
         kColorInputCnt
     };
     enum CoverageOutput {
         // modulate color and coverage, write result as the color output.
         kModulate_CoverageOutput,
         // Writes color*coverage as the primary color output and also writes coverage as the
         // secondary output. Only set if dual source blending is supported.
         kSecondaryCoverage_CoverageOutput,
         // Writes color*coverage as the primary color output and also writes coverage * (1 - colorA)
         // as the secondary output. Only set if dual source blending is supported.
         kSecondaryCoverageISA_CoverageOutput,
         // Writes color*coverage as the primary color output and also writes coverage *
         // (1 - colorRGB) as the secondary output. Only set if dual source blending is supported.
         kSecondaryCoverageISC_CoverageOutput,
         // Combines the coverage, dst, and color as coverage * color + (1 - coverage) * dst. This
         // can only be set if fDstReadKey is non-zero.
         kCombineWithDst_CoverageOutput,
         kCoverageOutputCnt
     };
     static bool CoverageOutputUsesSecondaryOutput(CoverageOutput co) {
         switch (co) {
             case kSecondaryCoverage_CoverageOutput: //  fallthru
             case kSecondaryCoverageISA_CoverageOutput:
             case kSecondaryCoverageISC_CoverageOutput:
                 return true;
             default:
                 return false;
         }
     }
     struct KeyHeader {
         GrGLShaderBuilder::DstReadKey fDstReadKey;      // set by GrGLShaderBuilder if there
                                                         // are effects that must read the dst.
                                                         // Otherwise, 0.
         GrGLShaderBuilder::FragPosKey fFragPosKey;      // set by GrGLShaderBuilder if there are
                                                         // effects that read the fragment position.
                                                         // Otherwise, 0.
         ColorInput                  fColorInput : 8;
         ColorInput                  fCoverageInput : 8;
         CoverageOutput              fCoverageOutput : 8;
         SkBool8                     fHasVertexCode;
         SkBool8                     fEmitsPointSize;
         // To enable experimental geometry shader code (not for use in
         // production)
 #if GR_GL_EXPERIMENTAL_GS
         SkBool8                     fExperimentalGS;
 #endif
         int8_t                      fPositionAttributeIndex;
         int8_t                      fLocalCoordAttributeIndex;
         int8_t                      fColorAttributeIndex;
         int8_t                      fCoverageAttributeIndex;
         int8_t                      fColorEffectCnt;
         int8_t                      fCoverageEffectCnt;
     };
     // The key is 1 uint32_t for the length, followed another for the checksum, the header, and then
     // the effect keys. Everything is fixed length except the effect key array.
     enum {
         kLengthOffset = 0,
         kChecksumOffset = kLengthOffset + sizeof(uint32_t),
         kHeaderOffset = kChecksumOffset + sizeof(uint32_t),
         kHeaderSize = SkAlign4(sizeof(KeyHeader)),
         kEffectKeyOffset = kHeaderOffset + kHeaderSize,
     };
     template<typename T, size_t OFFSET> T* atOffset() {
         return reinterpret_cast<T*>(reinterpret_cast<intptr_t>(fKey.get()) + OFFSET);
     }
     template<typename T, size_t OFFSET> const T* atOffset() const {
         return reinterpret_cast<const T*>(reinterpret_cast<intptr_t>(fKey.get()) + OFFSET);
     }
     typedef GrGLEffect::EffectKey EffectKey;
     uint32_t* checksum() { return this->atOffset<uint32_t, kChecksumOffset>(); }
     KeyHeader* header() { return this->atOffset<KeyHeader, kHeaderOffset>(); }
     EffectKey* effectKeys() { return this->atOffset<EffectKey, kEffectKeyOffset>(); }
     const KeyHeader& getHeader() const { return *this->atOffset<KeyHeader, kHeaderOffset>(); }
     const EffectKey* getEffectKeys() const { return this->atOffset<EffectKey, kEffectKeyOffset>(); }
     static size_t KeyLength(int effectCnt) {
         GR_STATIC_ASSERT(!(sizeof(EffectKey) & 0x3));
         return kEffectKeyOffset + effectCnt * sizeof(EffectKey);
     }
     enum {
         kMaxPreallocEffects = 16,
         kPreAllocSize = kEffectKeyOffset +  kMaxPreallocEffects * sizeof(EffectKey),
     };
     SkAutoSMalloc<kPreAllocSize> fKey;
     bool fInitialized;
     // GrGLProgram and GrGLShaderBuilder read the private fields to generate code. TODO: Move all
     // code generation to GrGLShaderBuilder (and maybe add getters rather than friending).
     friend class GrGLProgram;
     friend class GrGLShaderBuilder;
     friend class GrGLFullShaderBuilder;
     friend class GrGLFragmentOnlyShaderBuilder;
 };
 #endif

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

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