/*
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* Copyright 2007 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkColorShader_DEFINED
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#define SkColorShader_DEFINED
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#include "SkColorSpaceXformer.h"
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#include "SkShaderBase.h"
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/** \class SkColorShader
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A Shader that represents a single color. In general, this effect can be
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accomplished by just using the color field on the paint, but if an
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actual shader object is needed, this provides that feature.
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*/
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class SkColorShader : public SkShaderBase {
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public:
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/** Create a ColorShader that ignores the color in the paint, and uses the
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specified color. Note: like all shaders, at draw time the paint's alpha
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will be respected, and is applied to the specified color.
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*/
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explicit SkColorShader(SkColor c);
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bool isOpaque() const override;
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bool isConstant() const override { return true; }
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GradientType asAGradient(GradientInfo* info) const override;
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#if SK_SUPPORT_GPU
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std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
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#endif
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private:
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SK_FLATTENABLE_HOOKS(SkColorShader)
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void flatten(SkWriteBuffer&) const override;
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bool onAsLuminanceColor(SkColor* lum) const override {
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*lum = fColor;
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return true;
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}
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bool onAppendStages(const StageRec&) const override;
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sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override {
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return SkShader::MakeColorShader(xformer->apply(fColor));
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}
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SkColor fColor;
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};
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class SkColor4Shader : public SkShaderBase {
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public:
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SkColor4Shader(const SkColor4f&, sk_sp<SkColorSpace>);
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bool isOpaque() const override { return fColor.isOpaque(); }
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bool isConstant() const override { return true; }
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#if SK_SUPPORT_GPU
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std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
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#endif
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private:
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SK_FLATTENABLE_HOOKS(SkColor4Shader)
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void flatten(SkWriteBuffer&) const override;
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bool onAppendStages(const StageRec&) const override;
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sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
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sk_sp<SkColorSpace> fColorSpace;
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const SkColor4f fColor;
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};
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#endif
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