1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/core/SkComposeShader.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,58 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkComposeShader_DEFINED
1.14 +#define SkComposeShader_DEFINED
1.15 +
1.16 +#include "SkShader.h"
1.17 +
1.18 +class SkXfermode;
1.19 +
1.20 +///////////////////////////////////////////////////////////////////////////////////////////
1.21 +
1.22 +/** \class SkComposeShader
1.23 + This subclass of shader returns the coposition of two other shaders, combined by
1.24 + a xfermode.
1.25 +*/
1.26 +class SK_API SkComposeShader : public SkShader {
1.27 +public:
1.28 + /** Create a new compose shader, given shaders A, B, and a combining xfermode mode.
1.29 + When the xfermode is called, it will be given the result from shader A as its
1.30 + "dst", and the result of from shader B as its "src".
1.31 + mode->xfer32(sA_result, sB_result, ...)
1.32 + @param shaderA The colors from this shader are seen as the "dst" by the xfermode
1.33 + @param shaderB The colors from this shader are seen as the "src" by the xfermode
1.34 + @param mode The xfermode that combines the colors from the two shaders. If mode
1.35 + is null, then SRC_OVER is assumed.
1.36 + */
1.37 + SkComposeShader(SkShader* sA, SkShader* sB, SkXfermode* mode = NULL);
1.38 + virtual ~SkComposeShader();
1.39 +
1.40 + virtual bool setContext(const SkBitmap&, const SkPaint&,
1.41 + const SkMatrix&) SK_OVERRIDE;
1.42 + virtual void endContext() SK_OVERRIDE;
1.43 + virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE;
1.44 +
1.45 + SK_TO_STRING_OVERRIDE()
1.46 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader)
1.47 +
1.48 +protected:
1.49 + SkComposeShader(SkReadBuffer& );
1.50 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.51 +
1.52 +private:
1.53 +
1.54 + SkShader* fShaderA;
1.55 + SkShader* fShaderB;
1.56 + SkXfermode* fMode;
1.57 +
1.58 + typedef SkShader INHERITED;
1.59 +};
1.60 +
1.61 +#endif
