SkRuntimeShader.h

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/*
 * Copyright 2023 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#ifndef SkRuntimeShader_DEFINED
#define SkRuntimeShader_DEFINED
 
#include "include/core/SkData.h"
#include "include/core/SkFlattenable.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSpan.h"
#include "include/effects/SkRuntimeEffect.h"
#include "include/private/base/SkDebug.h"
#include "src/core/SkRuntimeEffectPriv.h"
#include "src/shaders/SkShaderBase.h"
#include "src/sksl/tracing/SkSLDebugTracePriv.h"
 
#include <vector>
 
class SkColorSpace;
class SkReadBuffer;
class SkWriteBuffer;
struct SkIPoint;
struct SkStageRec;
 
using UniformsCallback = SkRuntimeEffectPriv::UniformsCallback;
 
class SkRuntimeShader : public SkShaderBase {
public:
    SkRuntimeShader(sk_sp<SkRuntimeEffect> effect,
                    sk_sp<SkSL::DebugTracePriv> debugTrace,
                    sk_sp<const SkData> uniforms,
                    SkSpan<const SkRuntimeEffect::ChildPtr> children);
 
    SkRuntimeShader(sk_sp<SkRuntimeEffect> effect,
                    sk_sp<SkSL::DebugTracePriv> debugTrace,
                    UniformsCallback uniformsCallback,
                    SkSpan<const SkRuntimeEffect::ChildPtr> children);
 
    SkRuntimeEffect::TracedShader makeTracedClone(const SkIPoint& coord);
 
    bool isOpaque() const override { return fEffect->alwaysOpaque(); }
 
    ShaderType type() const override { return ShaderType::kRuntime; }
 
    bool appendStages(const SkStageRec& rec, const SkShaders::MatrixRec& mRec) const override;
 
    void flatten(SkWriteBuffer& buffer) const override;
 
    SkRuntimeEffect* asRuntimeEffect() const override { return fEffect.get(); }
 
    sk_sp<SkRuntimeEffect> effect() const { return fEffect; }
    SkSpan<const SkRuntimeEffect::ChildPtr> children() const { return fChildren; }
 
    sk_sp<const SkData> uniformData(const SkColorSpace* dstCS) const;
 
    SK_FLATTENABLE_HOOKS(SkRuntimeShader)
 
private:
    enum Flags {
        kHasLegacyLocalMatrix_Flag = 1 << 1,
    };
 
    sk_sp<SkRuntimeEffect> fEffect;
    sk_sp<SkSL::DebugTracePriv> fDebugTrace;
    sk_sp<const SkData> fUniformData;
    UniformsCallback fUniformsCallback;
    std::vector<SkRuntimeEffect::ChildPtr> fChildren;
};
 
#endif