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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/debug/trace_event.h" | 5 #include "base/debug/trace_event.h" |
6 #include "base/logging.h" | 6 #include "base/logging.h" |
7 #include "skia/ext/analysis_canvas.h" | 7 #include "skia/ext/analysis_canvas.h" |
8 #include "third_party/skia/include/core/SkDraw.h" | 8 #include "third_party/skia/include/core/SkDraw.h" |
9 #include "third_party/skia/include/core/SkRRect.h" | 9 #include "third_party/skia/include/core/SkRRect.h" |
10 #include "third_party/skia/include/core/SkShader.h" | 10 #include "third_party/skia/include/core/SkShader.h" |
11 #include "third_party/skia/src/core/SkRasterClip.h" | 11 #include "third_party/skia/src/core/SkRasterClip.h" |
12 #include "ui/gfx/rect_conversions.h" | 12 #include "ui/gfx/rect_conversions.h" |
13 | 13 |
14 namespace { | 14 namespace { |
15 | 15 |
16 const int kNoLayer = -1; | 16 const int kNoLayer = -1; |
17 | 17 |
| 18 bool ActsLikeClear(SkXfermode::Mode mode, unsigned src_alpha) { |
| 19 switch (mode) { |
| 20 case SkXfermode::kClear_Mode: |
| 21 return true; |
| 22 case SkXfermode::kSrc_Mode: |
| 23 case SkXfermode::kSrcIn_Mode: |
| 24 case SkXfermode::kDstIn_Mode: |
| 25 case SkXfermode::kSrcOut_Mode: |
| 26 case SkXfermode::kDstATop_Mode: |
| 27 return src_alpha == 0; |
| 28 case SkXfermode::kDstOut_Mode: |
| 29 return src_alpha == 0xFF; |
| 30 default: |
| 31 return false; |
| 32 } |
| 33 } |
| 34 |
18 bool IsSolidColorPaint(const SkPaint& paint) { | 35 bool IsSolidColorPaint(const SkPaint& paint) { |
19 SkXfermode::Mode xfermode; | 36 SkXfermode::Mode xfermode; |
20 | 37 |
21 // getXfermode can return a NULL, but that is handled | 38 // getXfermode can return a NULL, but that is handled |
22 // gracefully by AsMode (NULL turns into kSrcOver mode). | 39 // gracefully by AsMode (NULL turns into kSrcOver mode). |
23 SkXfermode::AsMode(paint.getXfermode(), &xfermode); | 40 SkXfermode::AsMode(paint.getXfermode(), &xfermode); |
24 | 41 |
25 // Paint is solid color if the following holds: | 42 // Paint is solid color if the following holds: |
26 // - Alpha is 1.0, style is fill, and there are no special effects | 43 // - Alpha is 1.0, style is fill, and there are no special effects |
27 // - Xfer mode is either kSrc or kSrcOver (kSrcOver is equivalent | 44 // - Xfer mode is either kSrc or kSrcOver (kSrcOver is equivalent |
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83 | 100 |
84 if (!is_forced_not_solid_ && SkColorGetA(color) == 255) { | 101 if (!is_forced_not_solid_ && SkColorGetA(color) == 255) { |
85 is_solid_color_ = true; | 102 is_solid_color_ = true; |
86 color_ = color; | 103 color_ = color; |
87 } else { | 104 } else { |
88 is_solid_color_ = false; | 105 is_solid_color_ = false; |
89 } | 106 } |
90 } | 107 } |
91 | 108 |
92 void AnalysisCanvas::drawPaint(const SkPaint& paint) { | 109 void AnalysisCanvas::drawPaint(const SkPaint& paint) { |
93 // This check is in SkCanvas::drawPaint(), and some of our unittests rely on | 110 SkRect rect; |
94 // on this, so we reproduce it here. | 111 getClipBounds(&rect); |
95 if (isClipEmpty()) | 112 drawRect(rect, paint); |
96 return; | |
97 | |
98 is_solid_color_ = false; | |
99 is_transparent_ = false; | |
100 ++draw_op_count_; | |
101 } | 113 } |
102 | 114 |
103 void AnalysisCanvas::drawPoints(SkCanvas::PointMode mode, | 115 void AnalysisCanvas::drawPoints(SkCanvas::PointMode mode, |
104 size_t count, | 116 size_t count, |
105 const SkPoint points[], | 117 const SkPoint points[], |
106 const SkPaint& paint) { | 118 const SkPaint& paint) { |
107 is_solid_color_ = false; | 119 is_solid_color_ = false; |
108 is_transparent_ = false; | 120 is_transparent_ = false; |
109 ++draw_op_count_; | 121 ++draw_op_count_; |
110 } | 122 } |
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130 // - The quad is a full tile quad | 142 // - The quad is a full tile quad |
131 // - We're not in "forced not transparent" mode | 143 // - We're not in "forced not transparent" mode |
132 // - Transfer mode is clear (0 color, 0 alpha) | 144 // - Transfer mode is clear (0 color, 0 alpha) |
133 // | 145 // |
134 // If the paint alpha is not 0, or if the transfrer mode is | 146 // If the paint alpha is not 0, or if the transfrer mode is |
135 // not src, then this canvas will not be transparent. | 147 // not src, then this canvas will not be transparent. |
136 // | 148 // |
137 // In all other cases, we keep the current transparent value | 149 // In all other cases, we keep the current transparent value |
138 if (does_cover_canvas && | 150 if (does_cover_canvas && |
139 !is_forced_not_transparent_ && | 151 !is_forced_not_transparent_ && |
140 xfermode == SkXfermode::kClear_Mode) { | 152 ActsLikeClear(xfermode, paint.getAlpha())) { |
141 is_transparent_ = true; | 153 is_transparent_ = true; |
142 } else if (paint.getAlpha() != 0 || xfermode != SkXfermode::kSrc_Mode) { | 154 } else if (paint.getAlpha() != 0 || xfermode != SkXfermode::kSrc_Mode) { |
143 is_transparent_ = false; | 155 is_transparent_ = false; |
144 } | 156 } |
145 | 157 |
146 // This bitmap is solid if and only if the following holds. | 158 // This bitmap is solid if and only if the following holds. |
147 // Note that this might be overly conservative: | 159 // Note that this might be overly conservative: |
148 // - We're not in "forced not solid" mode | 160 // - We're not in "forced not solid" mode |
149 // - Paint is solid color | 161 // - Paint is solid color |
150 // - The quad is a full tile quad | 162 // - The quad is a full tile quad |
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452 force_not_transparent_stack_level_ = kNoLayer; | 464 force_not_transparent_stack_level_ = kNoLayer; |
453 } | 465 } |
454 } | 466 } |
455 | 467 |
456 INHERITED::willRestore(); | 468 INHERITED::willRestore(); |
457 } | 469 } |
458 | 470 |
459 } // namespace skia | 471 } // namespace skia |
460 | 472 |
461 | 473 |
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