chromium/third_party/skia/src/core/SkRasterPipeline.h

/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkRasterPipeline_DEFINED
#define SkRasterPipeline_DEFINED

#include "include/core/SkColor.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkMacros.h"
#include "include/private/base/SkSpan_impl.h"
#include "include/private/base/SkTArray.h"
#include "src/base/SkArenaAlloc.h"
#include "src/core/SkRasterPipelineOpContexts.h"

#include <cstddef>
#include <cstdint>
#include <functional>

class SkMatrix;
enum class SkRasterPipelineOp;
enum SkColorType : int;
struct SkImageInfo;
struct skcms_TransferFunction;

#if __has_cpp_attribute(clang::musttail) && !defined(__EMSCRIPTEN__) && !defined(SK_CPU_ARM32) && \
        !defined(SK_CPU_LOONGARCH)
    #define SK_HAS_MUSTTAIL …
#else
    #define SK_HAS_MUSTTAIL …
#endif

/**
 * SkRasterPipeline provides a cheap way to chain together a pixel processing pipeline.
 *
 * It's particularly designed for situations where the potential pipeline is extremely
 * combinatoric: {N dst formats} x {M source formats} x {K mask formats} x {C transfer modes} ...
 * No one wants to write specialized routines for all those combinations, and if we did, we'd
 * end up bloating our code size dramatically.  SkRasterPipeline stages can be chained together
 * at runtime, so we can scale this problem linearly rather than combinatorically.
 *
 * Each stage is represented by a function conforming to a common interface and by an
 * arbitrary context pointer.  The stage function arguments and calling convention are
 * designed to maximize the amount of data we can pass along the pipeline cheaply, and
 * vary depending on CPU feature detection.
 */

// Raster pipeline programs are stored as a contiguous array of SkRasterPipelineStages.
SK_BEGIN_REQUIRE_DENSE
struct SkRasterPipelineStage { … };
SK_END_REQUIRE_DENSE

class SkRasterPipeline { … };

template <size_t bytes>
class SkRasterPipeline_ : public SkRasterPipeline { … };


#endif//SkRasterPipeline_DEFINED