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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkDebugCanvas.h" | 8 #include "SkDebugCanvas.h" |
9 #include "SkDevice.h" | 9 #include "SkDevice.h" |
10 #include "SkGraphics.h" | 10 #include "SkGraphics.h" |
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54 return false; | 54 return false; |
55 } | 55 } |
56 | 56 |
57 SaveLayer* saveLayer = (SaveLayer*) canvas->getDrawCommandAt(curCommand); | 57 SaveLayer* saveLayer = (SaveLayer*) canvas->getDrawCommandAt(curCommand); |
58 DrawBitmapRect* dbmr = (DrawBitmapRect*) canvas->getDrawCommandAt(curCommand
+1); | 58 DrawBitmapRect* dbmr = (DrawBitmapRect*) canvas->getDrawCommandAt(curCommand
+1); |
59 | 59 |
60 const SkPaint* saveLayerPaint = saveLayer->paint(); | 60 const SkPaint* saveLayerPaint = saveLayer->paint(); |
61 SkPaint* dbmrPaint = dbmr->paint(); | 61 SkPaint* dbmrPaint = dbmr->paint(); |
62 | 62 |
63 // For this optimization we only fold the saveLayer and drawBitmapRect | 63 // For this optimization we only fold the saveLayer and drawBitmapRect |
64 // together if the saveLayer's draw is simple (i.e., no fancy effects) and | 64 // together if the saveLayer's draw is simple (i.e., no fancy effects) |
65 // and the only difference in the colors is that the saveLayer's can have | 65 // and the only difference in the colors is their alpha value |
66 // an alpha while the drawBitmapRect's is opaque. | 66 SkColor layerColor = saveLayerPaint->getColor() | 0xFF000000; // force opaqu
e |
67 // TODO: it should be possible to fold them together even if they both | 67 SkColor dbmrColor = dbmrPaint->getColor() | 0xFF000000; // force opaqu
e |
68 // have different non-255 alphas but this is low priority since we have | 68 |
69 // never seen that case | |
70 // If either operation lacks a paint then the collapse is trivial | 69 // If either operation lacks a paint then the collapse is trivial |
71 SkColor layerColor = saveLayerPaint->getColor() | 0xFF000000; // force opaqu
e | |
72 | |
73 return NULL == saveLayerPaint || | 70 return NULL == saveLayerPaint || |
74 NULL == dbmrPaint || | 71 NULL == dbmrPaint || |
75 (is_simple(*saveLayerPaint) && dbmrPaint->getColor() == layerColor); | 72 (is_simple(*saveLayerPaint) && dbmrColor == layerColor); |
76 } | 73 } |
77 | 74 |
78 // Fold the saveLayer's alpha into the drawBitmapRect and remove the saveLayer | 75 // Fold the saveLayer's alpha into the drawBitmapRect and remove the saveLayer |
79 // and restore | 76 // and restore |
80 static void apply_0(SkDebugCanvas* canvas, int curCommand) { | 77 static void apply_0(SkDebugCanvas* canvas, int curCommand) { |
81 SaveLayer* saveLayer = (SaveLayer*) canvas->getDrawCommandAt(curCommand); | 78 SaveLayer* saveLayer = (SaveLayer*) canvas->getDrawCommandAt(curCommand); |
82 const SkPaint* saveLayerPaint = saveLayer->paint(); | 79 const SkPaint* saveLayerPaint = saveLayer->paint(); |
83 | 80 |
84 // if (NULL == saveLayerPaint) the dbmr's paint doesn't need to be changed | 81 // if (NULL == saveLayerPaint) the dbmr's paint doesn't need to be changed |
85 if (NULL != saveLayerPaint) { | 82 if (NULL != saveLayerPaint) { |
86 DrawBitmapRect* dbmr = (DrawBitmapRect*) canvas->getDrawCommandAt(curCom
mand+1); | 83 DrawBitmapRect* dbmr = (DrawBitmapRect*) canvas->getDrawCommandAt(curCom
mand+1); |
87 SkPaint* dbmrPaint = dbmr->paint(); | 84 SkPaint* dbmrPaint = dbmr->paint(); |
88 | 85 |
89 if (NULL == dbmrPaint) { | 86 if (NULL == dbmrPaint) { |
90 // if the DBMR doesn't have a paint just use the saveLayer's | 87 // if the DBMR doesn't have a paint just use the saveLayer's |
91 dbmr->setPaint(*saveLayerPaint); | 88 dbmr->setPaint(*saveLayerPaint); |
92 } else if (NULL != saveLayerPaint) { | 89 } else if (NULL != saveLayerPaint) { |
93 SkColor newColor = SkColorSetA(dbmrPaint->getColor(), | 90 // Both paints are present so their alphas need to be combined |
94 SkColorGetA(saveLayerPaint->getColor(
))); | 91 SkColor color = saveLayerPaint->getColor(); |
| 92 int a0 = SkColorGetA(color); |
| 93 |
| 94 color = dbmrPaint->getColor(); |
| 95 int a1 = SkColorGetA(color); |
| 96 |
| 97 int newA = SkMulDiv255Round(a0, a1); |
| 98 SkASSERT(newA <= 0xFF); |
| 99 |
| 100 SkColor newColor = SkColorSetA(color, newA); |
95 dbmrPaint->setColor(newColor); | 101 dbmrPaint->setColor(newColor); |
96 } | 102 } |
97 } | 103 } |
98 | 104 |
99 canvas->deleteDrawCommandAt(curCommand+2); // restore | 105 canvas->deleteDrawCommandAt(curCommand+2); // restore |
100 canvas->deleteDrawCommandAt(curCommand); // saveLayer | 106 canvas->deleteDrawCommandAt(curCommand); // saveLayer |
101 } | 107 } |
102 | 108 |
103 // Check for: | 109 // Check for: |
104 // SAVE_LAYER | 110 // SAVE_LAYER |
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450 } | 456 } |
451 | 457 |
452 const SkPaint* saveLayerPaint1 = saveLayer1->paint(); | 458 const SkPaint* saveLayerPaint1 = saveLayer1->paint(); |
453 if (NULL != saveLayerPaint1) { | 459 if (NULL != saveLayerPaint1) { |
454 color = saveLayerPaint1->getColor(); | 460 color = saveLayerPaint1->getColor(); |
455 a1 = SkColorGetA(color); | 461 a1 = SkColorGetA(color); |
456 } else { | 462 } else { |
457 a1 = 0xFF; | 463 a1 = 0xFF; |
458 } | 464 } |
459 | 465 |
460 int newA = (a0 * a1) / 255; | 466 int newA = SkMulDiv255Round(a0, a1); |
461 SkASSERT(newA <= 0xFF); | 467 SkASSERT(newA <= 0xFF); |
462 | 468 |
463 SkPaint* dbmrPaint = dbmr->paint(); | 469 SkPaint* dbmrPaint = dbmr->paint(); |
464 | 470 |
465 if (NULL != dbmrPaint) { | 471 if (NULL != dbmrPaint) { |
466 SkColor newColor = SkColorSetA(dbmrPaint->getColor(), newA); | 472 SkColor newColor = SkColorSetA(dbmrPaint->getColor(), newA); |
467 dbmrPaint->setColor(newColor); | 473 dbmrPaint->setColor(newColor); |
468 } else { | 474 } else { |
469 SkColor newColor = SkColorSetA(color, newA); | 475 SkColor newColor = SkColorSetA(color, newA); |
470 | 476 |
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789 | 795 |
790 SkGraphics::Term(); | 796 SkGraphics::Term(); |
791 return 0; | 797 return 0; |
792 } | 798 } |
793 | 799 |
794 #if !defined SK_BUILD_FOR_IOS | 800 #if !defined SK_BUILD_FOR_IOS |
795 int main(int argc, char * const argv[]) { | 801 int main(int argc, char * const argv[]) { |
796 return tool_main(argc, (char**) argv); | 802 return tool_main(argc, (char**) argv); |
797 } | 803 } |
798 #endif | 804 #endif |
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