/*

 * 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