| OLD | NEW |
| 1 | 1 |
| 2 /* | 2 /* |
| 3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
| 4 * | 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
| 7 */ | 7 */ |
| 8 | 8 |
| 9 | 9 |
| 10 #ifndef SkXfermode_DEFINED | 10 #ifndef SkXfermode_DEFINED |
| 11 #define SkXfermode_DEFINED | 11 #define SkXfermode_DEFINED |
| 12 | 12 |
| 13 #include "SkFlattenable.h" | 13 #include "SkFlattenable.h" |
| 14 #include "SkColor.h" | 14 #include "SkColor.h" |
| 15 | 15 |
| 16 class GrFragmentProcessor; | 16 class GrFragmentProcessor; |
| 17 class GrProcessorDataManager; | |
| 18 class GrTexture; | 17 class GrTexture; |
| 19 class GrXPFactory; | 18 class GrXPFactory; |
| 20 class SkString; | 19 class SkString; |
| 21 | 20 |
| 22 /** \class SkXfermode | 21 /** \class SkXfermode |
| 23 * | 22 * |
| 24 * SkXfermode is the base class for objects that are called to implement custom | 23 * SkXfermode is the base class for objects that are called to implement custom |
| 25 * "transfer-modes" in the drawing pipeline. The static function Create(Modes) | 24 * "transfer-modes" in the drawing pipeline. The static function Create(Modes) |
| 26 * can be called to return an instance of any of the predefined subclasses as | 25 * can be called to return an instance of any of the predefined subclasses as |
| 27 * specified in the Modes enum. When an SkXfermode is assigned to an SkPaint, | 26 * specified in the Modes enum. When an SkXfermode is assigned to an SkPaint, |
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| 194 */ | 193 */ |
| 195 static bool IsOpaque(const SkXfermode* xfer, SrcColorOpacity opacityType); | 194 static bool IsOpaque(const SkXfermode* xfer, SrcColorOpacity opacityType); |
| 196 | 195 |
| 197 /** Used to do in-shader blending between two colors computed in the shader
via a | 196 /** Used to do in-shader blending between two colors computed in the shader
via a |
| 198 GrFragmentProcessor. The input to the returned FP is the src color. The
dst color is | 197 GrFragmentProcessor. The input to the returned FP is the src color. The
dst color is |
| 199 provided by the dst param which becomes a child FP of the returned FP. I
f the params are | 198 provided by the dst param which becomes a child FP of the returned FP. I
f the params are |
| 200 null then this is just a query of whether the SkXfermode could support t
his functionality. | 199 null then this is just a query of whether the SkXfermode could support t
his functionality. |
| 201 It is legal for the function to succeed but return a null output. This i
ndicates that | 200 It is legal for the function to succeed but return a null output. This i
ndicates that |
| 202 the output of the blend is simply the src color. | 201 the output of the blend is simply the src color. |
| 203 */ | 202 */ |
| 204 virtual bool asFragmentProcessor(const GrFragmentProcessor** output, GrProce
ssorDataManager*, | 203 virtual bool asFragmentProcessor(const GrFragmentProcessor** output, |
| 205 const GrFragmentProcessor* dst) const; | 204 const GrFragmentProcessor* dst) const; |
| 206 | 205 |
| 207 /** A subclass may implement this factory function to work with the GPU back
end. It is legal | 206 /** A subclass may implement this factory function to work with the GPU back
end. It is legal |
| 208 to call this with xpf NULL to simply test the return value. If xpf is no
n-NULL then the | 207 to call this with xpf NULL to simply test the return value. If xpf is no
n-NULL then the |
| 209 xfermode may optionally allocate a factory to return to the caller as *x
pf. The caller | 208 xfermode may optionally allocate a factory to return to the caller as *x
pf. The caller |
| 210 will install it and own a ref to it. Since the xfermode may or may not a
ssign *xpf, the | 209 will install it and own a ref to it. Since the xfermode may or may not a
ssign *xpf, the |
| 211 caller should set *xpf to NULL beforehand. XferProcessors cannot use a b
ackground texture. | 210 caller should set *xpf to NULL beforehand. XferProcessors cannot use a b
ackground texture. |
| 212 */ | 211 */ |
| 213 virtual bool asXPFactory(GrXPFactory** xpf) const; | 212 virtual bool asXPFactory(GrXPFactory** xpf) const; |
| 214 | 213 |
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| 236 | 235 |
| 237 private: | 236 private: |
| 238 enum { | 237 enum { |
| 239 kModeCount = kLastMode + 1 | 238 kModeCount = kLastMode + 1 |
| 240 }; | 239 }; |
| 241 | 240 |
| 242 typedef SkFlattenable INHERITED; | 241 typedef SkFlattenable INHERITED; |
| 243 }; | 242 }; |
| 244 | 243 |
| 245 #endif | 244 #endif |
| OLD | NEW |