chromium/third_party/skia/src/gpu/ganesh/GrXferProcessor.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/GrXferProcessor.h"

#include "include/core/SkBlendMode.h"
#include "include/core/SkString.h"
#include "include/gpu/ganesh/GrTypes.h"
#include "src/gpu/KeyBuilder.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrShaderCaps.h"
#include "src/gpu/ganesh/effects/GrCustomXfermode.h"
#include "src/gpu/ganesh/effects/GrPorterDuffXferProcessor.h"
#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h"

#include <cstdint>

enum class GrClampType;

GrXferProcessor::GrXferProcessor(ClassID classID)
        : … { … }

GrXferProcessor::GrXferProcessor(ClassID classID, bool willReadDstColor,
                                 GrProcessorAnalysisCoverage coverage)
        : … { … }

bool GrXferProcessor::hasSecondaryOutput() const { … }

void GrXferProcessor::addToKey(const GrShaderCaps& caps,
                               skgpu::KeyBuilder* b,
                               const GrSurfaceOrigin* originIfDstTexture,
                               bool usesInputAttachmentForDstRead) const { … }

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

GrXPFactory::AnalysisProperties GrXPFactory::GetAnalysisProperties(
        const GrXPFactory* factory,
        const GrProcessorAnalysisColor& color,
        const GrProcessorAnalysisCoverage& coverage,
        const GrCaps& caps,
        GrClampType clampType) { … }

sk_sp<const GrXferProcessor> GrXPFactory::MakeXferProcessor(const GrXPFactory* factory,
                                                            const GrProcessorAnalysisColor& color,
                                                            GrProcessorAnalysisCoverage coverage,
                                                            const GrCaps& caps,
                                                            GrClampType clampType) { … }

const GrXPFactory* GrXPFactory::FromBlendMode(SkBlendMode mode) { … }

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

ProgramImpl;

// This is only called for cases where we are doing LCD coverage and not using in shader blending.
// For these cases we assume the the src alpha is 1, thus we can just use the max for the alpha
// coverage since src alpha will always be greater than or equal to dst alpha.
static void adjust_for_lcd_coverage(GrGLSLXPFragmentBuilder* fragBuilder,
                                    const char* srcCoverage,
                                    const GrXferProcessor& proc) { … }

void ProgramImpl::emitCode(const EmitArgs& args) { … }

void ProgramImpl::emitWriteSwizzle(GrGLSLXPFragmentBuilder* x,
                                   const skgpu::Swizzle& swizzle,
                                   const char* outColor,
                                   const char* outColorSecondary) const { … }

void ProgramImpl::setData(const GrGLSLProgramDataManager& pdm, const GrXferProcessor& xp) { … }

void ProgramImpl::DefaultCoverageModulation(GrGLSLXPFragmentBuilder* fragBuilder,
                                            const char* srcCoverage,
                                            const char* dstColor,
                                            const char* outColor,
                                            const char* outColorSecondary,
                                            const GrXferProcessor& proc) { … }