| /* |
| * 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 SkColorShader_DEFINED |
| #define SkColorShader_DEFINED |
| |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFlattenable.h" |
| #include "src/shaders/SkShaderBase.h" |
| |
| class SkReadBuffer; |
| class SkWriteBuffer; |
| struct SkStageRec; |
| |
| /** \class SkColorShader |
| A Shader that represents a single color. In general, this effect can be accomplished by just |
| using the color field on the paint, but if an actual shader object is needed, this provides that |
| feature. Note: like all shaders, at draw time the paint's alpha will be respected, and is |
| applied to the specified color. |
| */ |
| class SkColorShader : public SkShaderBase { |
| public: |
| /** Create a ColorShader wrapping the given sRGB color. |
| */ |
| explicit SkColorShader(const SkColor4f& c) : fColor(c) {} |
| |
| bool isOpaque() const override { return fColor.isOpaque(); } |
| bool isConstant(SkColor4f* color = nullptr) const override { |
| if (color) { |
| *color = fColor; |
| } |
| return true; |
| } |
| |
| ShaderType type() const override { return ShaderType::kColor; } |
| |
| const SkColor4f& color() const { return fColor; } |
| |
| private: |
| friend void ::SkRegisterColorShaderFlattenable(); |
| SK_FLATTENABLE_HOOKS(SkColorShader) |
| |
| void flatten(SkWriteBuffer&) const override; |
| |
| bool onAsLuminanceColor(SkColor4f* lum) const override { |
| *lum = fColor; |
| return true; |
| } |
| |
| bool appendStages(const SkStageRec&, const SkShaders::MatrixRec&) const override; |
| |
| // The color is stored in extended sRGB, regardless of the original color space that was |
| // passed into SkShaders::Color(). |
| const SkColor4f fColor; |
| }; |
| |
| #endif |