chromium/third_party/skia/src/gpu/ganesh/effects/GrBlendFragmentProcessor.cpp

/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h"

#include "include/core/SkBlendMode.h"
#include "include/core/SkString.h"
#include "include/private/SkColorData.h"
#include "src/base/SkRandom.h"
#include "src/core/SkBlendModePriv.h"
#include "src/gpu/Blend.h"
#include "src/gpu/KeyBuilder.h"
#include "src/gpu/ganesh/GrFragmentProcessor.h"
#include "src/gpu/ganesh/GrProcessorUnitTest.h"
#include "src/gpu/ganesh/glsl/GrGLSLBlend.h"
#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h"

#include <string>

class GrGLSLProgramDataManager;
struct GrShaderCaps;

// Some of the CPU implementations of blend modes differ from the GPU enough that
// we can't use the CPU implementation to implement constantOutputForConstantInput.
static inline bool does_cpu_blend_impl_match_gpu(SkBlendMode mode) { … }

//////////////////////////////////////////////////////////////////////////////

class BlendFragmentProcessor : public GrFragmentProcessor { … };

/////////////////////////////////////////////////////////////////////


GR_DEFINE_FRAGMENT_PROCESSOR_TEST(…)

#if defined(GPU_TEST_UTILS)
std::unique_ptr<GrFragmentProcessor> BlendFragmentProcessor::TestCreate(GrProcessorTestData* d) {
    // Create one or two random fragment processors.
    std::unique_ptr<GrFragmentProcessor> src(GrProcessorUnitTest::MakeOptionalChildFP(d));
    std::unique_ptr<GrFragmentProcessor> dst(GrProcessorUnitTest::MakeChildFP(d));
    if (d->fRandom->nextBool()) {
        std::swap(src, dst);
    }
    bool shareLogic = d->fRandom->nextBool();

    SkBlendMode mode =
            static_cast<SkBlendMode>(d->fRandom->nextRangeU(0, (int)SkBlendMode::kLastMode));
    return std::unique_ptr<GrFragmentProcessor>(
            new BlendFragmentProcessor(std::move(src), std::move(dst), mode, shareLogic));
}
#endif

std::unique_ptr<GrFragmentProcessor> BlendFragmentProcessor::clone() const { … }

std::unique_ptr<GrFragmentProcessor::ProgramImpl> BlendFragmentProcessor::onMakeProgramImpl()
        const { … }

//////////////////////////////////////////////////////////////////////////////

std::unique_ptr<GrFragmentProcessor> GrBlendFragmentProcessor::Make(
        std::unique_ptr<GrFragmentProcessor> src,
        std::unique_ptr<GrFragmentProcessor> dst,
        SkBlendMode mode,
        bool shareBlendLogic) { … }