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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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() { return fFlags; }
virtual uint8_t getSpan16Alpha() const;
virtual bool setContext(const SkBitmap& device, const SkPaint& paint,
const SkMatrix& matrix);
virtual void shadeSpan(int x, int y, SkPMColor span[], int count);
virtual void shadeSpan16(int x, int y, uint16_t span[], int count);
virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count);
virtual BitmapType asABitmap(SkBitmap* outTexture,
SkMatrix* outMatrix,
TileMode xy[2],
SkScalar* twoPointRadialParams) const;
virtual GradientType asAGradient(GradientInfo* info) const;
protected:
SkColorShader(SkFlattenableReadBuffer& );
virtual void flatten(SkFlattenableWriteBuffer& );
virtual Factory getFactory() { return CreateProc; }
private:
static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
return SkNEW_ARGS(SkColorShader, (buffer));
}
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;
// deferred allocation, used for asABitmap()
mutable SkPixelRef* fAsABitmapPixelRef;
typedef SkShader INHERITED;
};
#endif
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