chromium/third_party/skia/src/gpu/ganesh/GrFragmentProcessor.h

/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef GrFragmentProcessor_DEFINED
#define GrFragmentProcessor_DEFINED

#include "include/core/SkAlphaType.h"
#include "include/core/SkString.h"
#include "include/private/SkColorData.h"
#include "include/private/SkSLSampleUsage.h"
#include "include/private/base/SkAssert.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkMacros.h"
#include "include/private/base/SkTArray.h"
#include "include/private/base/SkTo.h"
#include "include/private/gpu/ganesh/GrTypesPriv.h"
#include "src/gpu/ganesh/GrProcessor.h"
#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h"

#include <cstdint>
#include <functional>
#include <memory>
#include <string_view>
#include <tuple>
#include <utility>

class GrGLSLFPFragmentBuilder;
class GrGLSLProgramDataManager;
struct GrShaderCaps;
class GrTextureEffect;
struct SkPoint;
struct SkRect;

namespace skgpu {
class KeyBuilder;
class Swizzle;
}

/**
 * Some fragment-processor creation methods have preconditions that might not be satisfied by the
 * calling code. Those methods can return a `GrFPResult` from their factory methods. If creation
 * succeeds, the new fragment processor is created and `success` is true. If a precondition is not
 * met, `success` is set to false and the input FP is returned unchanged.
 */
class GrFragmentProcessor;  // IWYU pragma: keep
GrFPResult;

/** Provides custom fragment shader code. Fragment processors receive an input position and
    produce an output color. They may contain uniforms and may have children fragment processors
    that are sampled.
 */
class GrFragmentProcessor : public GrProcessor { … };

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

class GrFragmentProcessor::ProgramImpl { … };

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

SK_MAKE_BITFIELD_OPS(GrFragmentProcessor::OptimizationFlags)

static inline GrFPResult GrFPFailure(std::unique_ptr<GrFragmentProcessor> fp) { … }
static inline GrFPResult GrFPSuccess(std::unique_ptr<GrFragmentProcessor> fp) { … }
// Equivalent to GrFPSuccess except it allows the returned fragment processor to be null.
static inline GrFPResult GrFPNullableSuccess(std::unique_ptr<GrFragmentProcessor> fp) { … }

#endif