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/*
* 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 {
public:
/** Create a ColorShader that will inherit its color from the Paint
at draw time.
*/
SkColorShader();
/** 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.
*/
SkColorShader(SkColor c);
virtual ~SkColorShader();
virtual uint32_t getFlags() SK_OVERRIDE;
virtual uint8_t getSpan16Alpha() const SK_OVERRIDE;
virtual bool isOpaque() const SK_OVERRIDE;
virtual bool setContext(const SkBitmap& device, const SkPaint& paint,
const SkMatrix& matrix) SK_OVERRIDE;
virtual void shadeSpan(int x, int y, SkPMColor span[], int count) SK_OVERRIDE;
virtual void shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE;
virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) SK_OVERRIDE;
// we return false for this, use asAGradient
virtual BitmapType asABitmap(SkBitmap* outTexture,
SkMatrix* outMatrix,
TileMode xy[2],
SkScalar* twoPointRadialParams) const SK_OVERRIDE;
virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
protected:
SkColorShader(SkFlattenableReadBuffer&);
virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
virtual Factory getFactory() SK_OVERRIDE;
private:
static SkFlattenable* CreateProc(SkFlattenableReadBuffer&);
SkColor fColor; // ignored if fInheritColor is true
SkPMColor fPMColor; // cached after setContext()
uint32_t fFlags; // cached after setContext()
uint16_t fColor16; // cached after setContext()
SkBool8 fInheritColor;
typedef SkShader INHERITED;
};
#endif
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