SkShader.h

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/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef SkShader_DEFINED
#define SkShader_DEFINED
 
#include "include/core/SkColor.h"
#include "include/core/SkFlattenable.h"
#include "include/core/SkRefCnt.h"
#include "include/private/base/SkAPI.h"
 
class SkBlender;
class SkColorFilter;
class SkColorSpace;
class SkImage;
class SkMatrix;
enum class SkBlendMode;
enum class SkTileMode;
struct SkRect;
 
class SK_API SkShader : public SkFlattenable {
public:
    virtual bool isOpaque() const { return false; }
 
    SkImage* isAImage(SkMatrix* localMatrix, SkTileMode xy[2]) const;
 
    bool isAImage() const {
        return this->isAImage(nullptr, (SkTileMode*)nullptr) != nullptr;
    }
 
    //  Methods to create combinations or variants of shaders
 
    sk_sp<SkShader> makeWithLocalMatrix(const SkMatrix&) const;
 
    sk_sp<SkShader> makeWithColorFilter(sk_sp<SkColorFilter>) const;
 
    sk_sp<SkShader> makeWithWorkingColorSpace(sk_sp<SkColorSpace>) const;
 
private:
    SkShader() = default;
    friend class SkShaderBase;
 
    using INHERITED = SkFlattenable;
};
 
namespace SkShaders {
SK_API sk_sp<SkShader> Empty();
SK_API sk_sp<SkShader> Color(SkColor);
SK_API sk_sp<SkShader> Color(const SkColor4f&, sk_sp<SkColorSpace>);
SK_API sk_sp<SkShader> Blend(SkBlendMode mode, sk_sp<SkShader> dst, sk_sp<SkShader> src);
SK_API sk_sp<SkShader> Blend(sk_sp<SkBlender>, sk_sp<SkShader> dst, sk_sp<SkShader> src);
SK_API sk_sp<SkShader> CoordClamp(sk_sp<SkShader>, const SkRect& subset);
}
 
#endif