epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2006 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 4 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 9 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 10 | #ifndef SkComposeShader_DEFINED |
| 11 | #define SkComposeShader_DEFINED |
| 12 | |
| 13 | #include "SkShader.h" |
| 14 | |
| 15 | class SkXfermode; |
| 16 | |
| 17 | /////////////////////////////////////////////////////////////////////////////////////////// |
| 18 | |
| 19 | /** \class SkComposeShader |
| 20 | This subclass of shader returns the coposition of two other shaders, combined by |
| 21 | a xfermode. |
| 22 | */ |
ctguil@chromium.org | c7d9f9d | 2011-05-20 22:16:08 +0000 | [diff] [blame] | 23 | class SK_API SkComposeShader : public SkShader { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 24 | public: |
| 25 | /** Create a new compose shader, given shaders A, B, and a combining xfermode mode. |
| 26 | When the xfermode is called, it will be given the result from shader A as its |
| 27 | "dst", and the result of from shader B as its "src". |
| 28 | mode->xfer32(sA_result, sB_result, ...) |
| 29 | @param shaderA The colors from this shader are seen as the "dst" by the xfermode |
| 30 | @param shaderB The colors from this shader are seen as the "src" by the xfermode |
| 31 | @param mode The xfermode that combines the colors from the two shaders. If mode |
| 32 | is null, then SRC_OVER is assumed. |
| 33 | */ |
| 34 | SkComposeShader(SkShader* sA, SkShader* sB, SkXfermode* mode = NULL); |
| 35 | virtual ~SkComposeShader(); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame^] | 36 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 37 | // override |
| 38 | virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix); |
| 39 | virtual void shadeSpan(int x, int y, SkPMColor result[], int count); |
| 40 | virtual void beginSession(); |
| 41 | virtual void endSession(); |
| 42 | |
djsollen@google.com | ba28d03 | 2012-03-26 17:57:35 +0000 | [diff] [blame] | 43 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader) |
| 44 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 45 | protected: |
| 46 | SkComposeShader(SkFlattenableReadBuffer& ); |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 47 | virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 48 | |
| 49 | private: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 50 | |
| 51 | SkShader* fShaderA; |
| 52 | SkShader* fShaderB; |
| 53 | SkXfermode* fMode; |
| 54 | |
| 55 | typedef SkShader INHERITED; |
| 56 | }; |
| 57 | |
| 58 | #endif |