67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
/*
|
|
* Copyright (C) 2006 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 SkComposeShader_DEFINED
|
|
#define SkComposeShader_DEFINED
|
|
|
|
#include "SkShader.h"
|
|
|
|
class SkXfermode;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/** \class SkComposeShader
|
|
This subclass of shader returns the coposition of two other shaders, combined by
|
|
a xfermode.
|
|
*/
|
|
class SkComposeShader : public SkShader {
|
|
public:
|
|
/** Create a new compose shader, given shaders A, B, and a combining xfermode mode.
|
|
When the xfermode is called, it will be given the result from shader A as its
|
|
"dst", and the result of from shader B as its "src".
|
|
mode->xfer32(sA_result, sB_result, ...)
|
|
@param shaderA The colors from this shader are seen as the "dst" by the xfermode
|
|
@param shaderB The colors from this shader are seen as the "src" by the xfermode
|
|
@param mode The xfermode that combines the colors from the two shaders. If mode
|
|
is null, then SRC_OVER is assumed.
|
|
*/
|
|
SkComposeShader(SkShader* sA, SkShader* sB, SkXfermode* mode = NULL);
|
|
virtual ~SkComposeShader();
|
|
|
|
// override
|
|
virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix);
|
|
virtual void shadeSpan(int x, int y, SkPMColor result[], int count);
|
|
virtual void beginSession();
|
|
virtual void endSession();
|
|
|
|
protected:
|
|
SkComposeShader(SkFlattenableReadBuffer& );
|
|
virtual void flatten(SkFlattenableWriteBuffer& );
|
|
virtual Factory getFactory() { return CreateProc; }
|
|
|
|
private:
|
|
static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
|
|
return SkNEW_ARGS(SkComposeShader, (buffer)); }
|
|
|
|
SkShader* fShaderA;
|
|
SkShader* fShaderB;
|
|
SkXfermode* fMode;
|
|
|
|
typedef SkShader INHERITED;
|
|
};
|
|
|
|
#endif
|