54924243c1
The following changes were made by this CL: 1. Make flatten() a protected method as callers should use SkFlattenableWriteBuffer to flatten an object 2. Make flatten a const method (including subclasses) 3. Mark subclass implementation of flatten with SK_OVERRIDE 4. Ensure overridden flatten impls call their parent 5. Remove no-op implementations of flatten from subclasses Additionally, if necessary the unflattening constructor was also moved to the protected section of the subclasses header if it was not already there. git-svn-id: http://skia.googlecode.com/svn/trunk@3540 2bbb7eff-a529-9590-31e7-b0007b416f81
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkComposeShader_DEFINED
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#define SkComposeShader_DEFINED
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#include "SkShader.h"
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class SkXfermode;
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///////////////////////////////////////////////////////////////////////////////////////////
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/** \class SkComposeShader
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This subclass of shader returns the coposition of two other shaders, combined by
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a xfermode.
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*/
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class SK_API SkComposeShader : public SkShader {
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public:
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/** Create a new compose shader, given shaders A, B, and a combining xfermode mode.
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When the xfermode is called, it will be given the result from shader A as its
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"dst", and the result of from shader B as its "src".
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mode->xfer32(sA_result, sB_result, ...)
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@param shaderA The colors from this shader are seen as the "dst" by the xfermode
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@param shaderB The colors from this shader are seen as the "src" by the xfermode
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@param mode The xfermode that combines the colors from the two shaders. If mode
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is null, then SRC_OVER is assumed.
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*/
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SkComposeShader(SkShader* sA, SkShader* sB, SkXfermode* mode = NULL);
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virtual ~SkComposeShader();
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// override
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virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix);
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virtual void shadeSpan(int x, int y, SkPMColor result[], int count);
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virtual void beginSession();
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virtual void endSession();
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader)
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protected:
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SkComposeShader(SkFlattenableReadBuffer& );
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virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
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private:
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SkShader* fShaderA;
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SkShader* fShaderB;
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SkXfermode* fMode;
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typedef SkShader INHERITED;
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};
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#endif
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