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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
(...skipping 15 matching lines...) Expand all Loading... | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "config.h" | 31 #include "config.h" |
32 #include "core/platform/graphics/DrawLooper.h" | 32 #include "core/platform/graphics/DrawLooper.h" |
33 | 33 |
34 #include "core/platform/graphics/Color.h" | 34 #include "core/platform/graphics/Color.h" |
35 #include "core/platform/graphics/FloatSize.h" | 35 #include "core/platform/graphics/FloatSize.h" |
36 #include "third_party/skia/include/core/SkBitmap.h" | |
36 #include "third_party/skia/include/core/SkColor.h" | 37 #include "third_party/skia/include/core/SkColor.h" |
37 #include "third_party/skia/include/core/SkColorFilter.h" | 38 #include "third_party/skia/include/core/SkColorFilter.h" |
38 #include "third_party/skia/include/core/SkDrawLooper.h" | 39 #include "third_party/skia/include/core/SkDrawLooper.h" |
39 #include "third_party/skia/include/core/SkPaint.h" | 40 #include "third_party/skia/include/core/SkPaint.h" |
40 #include "third_party/skia/include/core/SkXfermode.h" | 41 #include "third_party/skia/include/core/SkXfermode.h" |
41 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" | 42 #include "third_party/skia/include/effects/SkBlurMaskFilter.h" |
43 #include "third_party/skia/include/effects/SkDropShadowImageFilter.h" | |
42 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" | 44 #include "third_party/skia/include/effects/SkLayerDrawLooper.h" |
43 | 45 |
44 namespace WebCore { | 46 namespace WebCore { |
45 | 47 |
46 DrawLooper::DrawLooper() : m_skDrawLooper(adoptRef(new SkLayerDrawLooper)) { } | 48 DrawLooper::DrawLooper() { } |
47 | 49 |
48 DrawLooper::~DrawLooper() { } | 50 DrawLooper::~DrawLooper() { } |
49 | 51 |
50 SkDrawLooper* DrawLooper::skDrawLooper() const | 52 SkDrawLooper* DrawLooper::skDrawLooper() |
Stephen White
2013/08/26 17:57:16
Nit: if you wanted to keep this function const, yo
Justin Novosad
2013/08/26 18:46:41
Done.
| |
51 { | 53 { |
52 return m_skDrawLooper.get(); | 54 if (!m_cachedDrawLooper) |
55 buildCachedDrawLooper(); | |
56 return m_cachedDrawLooper.get(); | |
57 } | |
58 | |
59 SkImageFilter* DrawLooper::imageFilter() | |
60 { | |
61 if (!m_cachedImageFilter) | |
62 buildCachedImageFilter(); | |
63 return m_cachedImageFilter.get(); | |
64 } | |
65 | |
66 void DrawLooper::clearCached() | |
67 { | |
68 m_cachedDrawLooper.clear(); | |
69 m_cachedImageFilter.clear(); | |
53 } | 70 } |
54 | 71 |
55 void DrawLooper::addUnmodifiedContent() | 72 void DrawLooper::addUnmodifiedContent() |
56 { | 73 { |
57 SkLayerDrawLooper::LayerInfo info; | 74 DrawLooperLayerInfo info; |
58 m_skDrawLooper->addLayerOnTop(info); | 75 info.m_layerType = UnmodifiedLayer; |
76 m_layerInfo.append(info); | |
77 clearCached(); | |
59 } | 78 } |
60 | 79 |
61 void DrawLooper::addShadow(const FloatSize& offset, float blur, const Color& col or, | 80 void DrawLooper::addShadow(const FloatSize& offset, float blur, const Color& col or, |
62 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) | 81 ShadowTransformMode shadowTransformMode, ShadowAlphaMode shadowAlphaMode) |
63 { | 82 { |
64 // Detect when there's no effective shadow. | 83 // Detect when there's no effective shadow. |
65 if (!color.alpha()) | 84 if (!color.alpha()) |
66 return; | 85 return; |
86 DrawLooperLayerInfo info; | |
87 info.m_layerType = ShadowLayer; | |
88 info.m_blur = blur; | |
89 info.m_color = color; | |
90 info.m_offset = offset; | |
91 info.m_shadowAlphaMode = shadowAlphaMode; | |
92 info.m_shadowTransformMode = shadowTransformMode; | |
93 m_layerInfo.append(info); | |
94 clearCached(); | |
95 }; | |
67 | 96 |
68 SkColor skColor = color.rgb(); | 97 void DrawLooper::buildCachedDrawLooper() |
98 { | |
99 m_cachedDrawLooper = adoptRef(new SkLayerDrawLooper); | |
100 LayerVector::const_iterator info; | |
101 for (info = m_layerInfo.begin(); info < m_layerInfo.end(); ++info) { | |
102 if (info->m_layerType == ShadowLayer) { | |
103 SkColor skColor = info->m_color.rgb(); | |
69 | 104 |
70 SkLayerDrawLooper::LayerInfo info; | 105 SkLayerDrawLooper::LayerInfo skInfo; |
71 | 106 |
72 switch (shadowAlphaMode) { | 107 switch (info->m_shadowAlphaMode) { |
73 case ShadowRespectsAlpha: | 108 case ShadowRespectsAlpha: |
74 info.fColorMode = SkXfermode::kDst_Mode; | 109 skInfo.fColorMode = SkXfermode::kDst_Mode; |
75 break; | 110 break; |
76 case ShadowIgnoresAlpha: | 111 case ShadowIgnoresAlpha: |
77 info.fColorMode = SkXfermode::kSrc_Mode; | 112 skInfo.fColorMode = SkXfermode::kSrc_Mode; |
78 break; | 113 break; |
79 default: | 114 default: |
80 ASSERT_NOT_REACHED(); | 115 ASSERT_NOT_REACHED(); |
116 } | |
117 | |
118 if (info->m_blur) | |
119 skInfo.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur | |
120 skInfo.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | |
121 skInfo.fOffset.set(info->m_offset.width(), info->m_offset.height()); | |
122 skInfo.fPostTranslate = (info->m_shadowTransformMode == ShadowIgnore sTransforms); | |
123 | |
124 SkPaint* paint = m_cachedDrawLooper->addLayerOnTop(skInfo); | |
125 | |
126 if (info->m_blur) { | |
127 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; | |
128 if (info->m_shadowTransformMode == ShadowIgnoresTransforms) | |
129 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; | |
130 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create( | |
131 (double)info->m_blur / 2.0, SkBlurMaskFilter::kNormal_BlurSt yle, mfFlags)); | |
132 paint->setMaskFilter(mf.get()); | |
133 } | |
134 | |
135 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter( skColor, SkXfermode::kSrcIn_Mode)); | |
136 paint->setColorFilter(cf.get()); | |
137 } else { | |
138 // Unmodified layer | |
139 SkLayerDrawLooper::LayerInfo skInfo; | |
140 m_cachedDrawLooper->addLayerOnTop(skInfo); | |
141 } | |
81 } | 142 } |
143 } | |
82 | 144 |
83 if (blur) | 145 void DrawLooper::buildCachedImageFilter() |
84 info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; // our blur | 146 { |
85 info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; | 147 ASSERT(m_layerInfo.size() == 2); |
86 info.fOffset.set(offset.width(), offset.height()); | 148 ASSERT(m_layerInfo[0].m_layerType == ShadowLayer); |
87 info.fPostTranslate = (shadowTransformMode == ShadowIgnoresTransforms); | 149 ASSERT(m_layerInfo[1].m_layerType == UnmodifiedLayer); |
150 ASSERT(m_layerInfo[0].m_shadowAlphaMode == ShadowRespectsAlpha); | |
151 ASSERT(m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms); | |
152 const float blurToSigmaFactor = 0.25; | |
153 SkColor skColor = m_layerInfo[0].m_color.rgb(); | |
154 m_cachedImageFilter = adoptRef(new SkDropShadowImageFilter(m_layerInfo[0].m_ offset.width(), m_layerInfo[0].m_offset.height(), m_layerInfo[0].m_blur * blurTo SigmaFactor, skColor)); | |
155 } | |
88 | 156 |
89 SkPaint* paint = m_skDrawLooper->addLayerOnTop(info); | 157 bool DrawLooper::shouldUseImageFilterToDrawBitmap(const SkBitmap& bitmap) |
158 { | |
159 if (bitmap.isOpaque() || !m_layerInfo.size()) | |
160 return false; | |
90 | 161 |
91 if (blur) { | 162 #if !ASSERT_DISABLED |
92 uint32_t mfFlags = SkBlurMaskFilter::kHighQuality_BlurFlag; | 163 // Verify that cases that require a mask filter to render correctly are of |
93 if (shadowTransformMode == ShadowIgnoresTransforms) | 164 // a form that can be handled by DropShadowImageFilter. |
94 mfFlags |= SkBlurMaskFilter::kIgnoreTransform_BlurFlag; | 165 LayerVector::const_iterator info; |
95 RefPtr<SkMaskFilter> mf = adoptRef(SkBlurMaskFilter::Create( | 166 int unmodifiedCount = 0; |
96 (double)blur / 2.0, SkBlurMaskFilter::kNormal_BlurStyle, mfFlags)); | 167 int shadowCount = 0; |
97 paint->setMaskFilter(mf.get()); | 168 bool needsFilter = false; |
169 for (info = m_layerInfo.begin(); info < m_layerInfo.end(); ++info) { | |
170 if (info->m_layerType == ShadowLayer) { | |
171 needsFilter = needsFilter || (info->m_blur && info->m_shadowAlphaMod e == ShadowRespectsAlpha); | |
172 shadowCount++; | |
173 } else { | |
174 unmodifiedCount++; | |
175 } | |
176 | |
98 } | 177 } |
178 if (needsFilter) { | |
179 // If any of the following assertions ever fire, it means that we are hi tting | |
180 // case that may not be rendered correclty by the DrawLooper and cannot be | |
181 // handled by DropShadowImageFilter. | |
182 ASSERT(shadowCount == 1); | |
183 ASSERT(unmodifiedCount == 1); | |
184 ASSERT(m_layerInfo[0].m_layerType == ShadowLayer); | |
185 ASSERT(m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms); | |
186 } | |
187 #endif | |
99 | 188 |
100 RefPtr<SkColorFilter> cf = adoptRef(SkColorFilter::CreateModeFilter(skColor, SkXfermode::kSrcIn_Mode)); | 189 return m_layerInfo.size() == 2 |
101 paint->setColorFilter(cf.get()); | 190 && m_layerInfo[0].m_layerType == ShadowLayer |
191 && m_layerInfo[0].m_shadowAlphaMode == ShadowRespectsAlpha | |
192 && m_layerInfo[0].m_shadowTransformMode == ShadowIgnoresTransforms | |
193 && m_layerInfo[0].m_blur | |
194 && m_layerInfo[1].m_layerType == UnmodifiedLayer; | |
102 } | 195 } |
103 | 196 |
104 } // namespace WebCore | 197 } // namespace WebCore |
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