blob: 9fbd5e1e8e2a4883c677e02ca930ee66bf6f7ea1 [file] [log] [blame]
* Copyright 2007 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 SkColorShader_DEFINED
#define SkColorShader_DEFINED
#include "SkShader.h"
/** \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.
class SK_API SkColorShader : public SkShader {
/** Create a ColorShader that ignores the color in the paint, and uses the
specified color. Note: like all shaders, at draw time the paint's alpha
will be respected, and is applied to the specified color.
explicit SkColorShader(SkColor c);
bool isOpaque() const SK_OVERRIDE;
size_t contextSize() const SK_OVERRIDE {
return sizeof(ColorShaderContext);
class ColorShaderContext : public SkShader::Context {
ColorShaderContext(const SkColorShader& shader, const ContextRec&);
uint32_t getFlags() const SK_OVERRIDE;
uint8_t getSpan16Alpha() const SK_OVERRIDE;
void shadeSpan(int x, int y, SkPMColor span[], int count) SK_OVERRIDE;
void shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE;
void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) SK_OVERRIDE;
SkPMColor fPMColor;
uint32_t fFlags;
uint16_t fColor16;
typedef SkShader::Context INHERITED;
// we return false for this, use asAGradient
virtual BitmapType asABitmap(SkBitmap* outTexture,
SkMatrix* outMatrix,
TileMode xy[2]) const SK_OVERRIDE;
GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
virtual bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
const SkMatrix*, GrColor*,
GrFragmentProcessor**) const SK_OVERRIDE;
void flatten(SkWriteBuffer&) const SK_OVERRIDE;
Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
bool onAsLuminanceColor(SkColor* lum) const SK_OVERRIDE {
*lum = fColor;
return true;
SkColor fColor;
typedef SkShader INHERITED;