The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/core/SkPaintPriv.cpp
gfx/skia/trunk/src/core/SkPaintPriv.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:47ae7f9de32e |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "SkPaintPriv.h" | |
| 9 | |
| 10 #include "SkBitmap.h" | |
| 11 #include "SkColorFilter.h" | |
| 12 #include "SkPaint.h" | |
| 13 #include "SkShader.h" | |
| 14 | |
| 15 bool isPaintOpaque(const SkPaint* paint, | |
| 16 const SkBitmap* bmpReplacesShader) { | |
| 17 // TODO: SkXfermode should have a virtual isOpaque method, which would | |
| 18 // make it possible to test modes that do not have a Coeff representation. | |
| 19 | |
| 20 if (!paint) { | |
| 21 return bmpReplacesShader ? bmpReplacesShader->isOpaque() : true; | |
| 22 } | |
| 23 | |
| 24 SkXfermode::Coeff srcCoeff, dstCoeff; | |
| 25 if (SkXfermode::AsCoeff(paint->getXfermode(), &srcCoeff, &dstCoeff)){ | |
| 26 if (SkXfermode::kDA_Coeff == srcCoeff || SkXfermode::kDC_Coeff == srcCoeff || | |
| 27 SkXfermode::kIDA_Coeff == srcCoeff || SkXfermode::kIDC_Coeff == srcCoeff) { | |
| 28 return false; | |
| 29 } | |
| 30 switch (dstCoeff) { | |
| 31 case SkXfermode::kZero_Coeff: | |
| 32 return true; | |
| 33 case SkXfermode::kISA_Coeff: | |
| 34 if (paint->getAlpha() != 255) { | |
| 35 break; | |
| 36 } | |
| 37 if (bmpReplacesShader) { | |
| 38 if (!bmpReplacesShader->isOpaque()) { | |
| 39 break; | |
| 40 } | |
| 41 } else if (paint->getShader() && !paint->getShader()->isOpaque()) { | |
| 42 break; | |
| 43 } | |
| 44 if (paint->getColorFilter() && | |
| 45 ((paint->getColorFilter()->getFlags() & | |
| 46 SkColorFilter::kAlphaUnchanged_Flag) == 0)) { | |
| 47 break; | |
| 48 } | |
| 49 return true; | |
| 50 case SkXfermode::kSA_Coeff: | |
| 51 if (paint->getAlpha() != 0) { | |
| 52 break; | |
| 53 } | |
| 54 if (paint->getColorFilter() && | |
| 55 ((paint->getColorFilter()->getFlags() & | |
| 56 SkColorFilter::kAlphaUnchanged_Flag) == 0)) { | |
| 57 break; | |
| 58 } | |
| 59 return true; | |
| 60 case SkXfermode::kSC_Coeff: | |
| 61 if (paint->getColor() != 0) { // all components must be 0 | |
| 62 break; | |
| 63 } | |
| 64 if (bmpReplacesShader || paint->getShader()) { | |
| 65 break; | |
| 66 } | |
| 67 if (paint->getColorFilter() && ( | |
| 68 (paint->getColorFilter()->getFlags() & | |
| 69 SkColorFilter::kAlphaUnchanged_Flag) == 0)) { | |
| 70 break; | |
| 71 } | |
| 72 return true; | |
| 73 default: | |
| 74 break; | |
| 75 } | |
| 76 } | |
| 77 return false; | |
| 78 } |
