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| 1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 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 #ifndef CCDrawQuad_h | 5 // Temporary forwarding header |
| 6 #define CCDrawQuad_h | 6 #include "cc/draw_quad.h" |
| 7 | |
| 8 #include "CCSharedQuadState.h" | |
| 9 | |
| 10 namespace cc { | |
| 11 | |
| 12 // WARNING! All CCXYZDrawQuad classes must remain PODs (plain old data). | |
| 13 // They are intended to be "serializable" by copying their raw bytes, so they | |
| 14 // must not contain any non-bit-copyable member variables! | |
| 15 // | |
| 16 // Furthermore, the class members need to be packed so they are aligned | |
| 17 // properly and don't have paddings/gaps, otherwise memory check tools | |
| 18 // like Valgrind will complain about uninitialized memory usage when | |
| 19 // transferring these classes over the wire. | |
| 20 #pragma pack(push, 4) | |
| 21 | |
| 22 // CCDrawQuad is a bag of data used for drawing a quad. Because different | |
| 23 // materials need different bits of per-quad data to render, classes that derive | |
| 24 // from CCDrawQuad store additional data in their derived instance. The Material | |
| 25 // enum is used to "safely" downcast to the derived class. | |
| 26 class CCDrawQuad { | |
| 27 public: | |
| 28 enum Material { | |
| 29 Invalid, | |
| 30 Checkerboard, | |
| 31 DebugBorder, | |
| 32 IOSurfaceContent, | |
| 33 RenderPass, | |
| 34 TextureContent, | |
| 35 SolidColor, | |
| 36 TiledContent, | |
| 37 YUVVideoContent, | |
| 38 StreamVideoContent, | |
| 39 }; | |
| 40 | |
| 41 IntRect quadRect() const { return m_quadRect; } | |
| 42 const WebKit::WebTransformationMatrix& quadTransform() const { return m_shar
edQuadState->quadTransform; } | |
| 43 IntRect visibleContentRect() const { return m_sharedQuadState->visibleConten
tRect; } | |
| 44 IntRect clippedRectInTarget() const { return m_sharedQuadState->clippedRectI
nTarget; } | |
| 45 float opacity() const { return m_sharedQuadState->opacity; } | |
| 46 // For the purposes of blending, what part of the contents of this quad are
opaque? | |
| 47 IntRect opaqueRect() const; | |
| 48 bool needsBlending() const { return m_needsBlending || !opaqueRect().contain
s(m_quadVisibleRect); } | |
| 49 | |
| 50 // Allows changing the rect that gets drawn to make it smaller. Parameter pa
ssed | |
| 51 // in will be clipped to quadRect(). | |
| 52 void setQuadVisibleRect(const IntRect&); | |
| 53 IntRect quadVisibleRect() const { return m_quadVisibleRect; } | |
| 54 bool isDebugQuad() const { return m_material == DebugBorder; } | |
| 55 | |
| 56 Material material() const { return m_material; } | |
| 57 | |
| 58 // Returns transfer size of this object based on the derived class (by | |
| 59 // looking at the material type). | |
| 60 unsigned size() const; | |
| 61 | |
| 62 scoped_ptr<CCDrawQuad> copy(const CCSharedQuadState* copiedSharedQuadState)
const; | |
| 63 | |
| 64 const CCSharedQuadState* sharedQuadState() const { return m_sharedQuadState;
} | |
| 65 int sharedQuadStateId() const { return m_sharedQuadStateId; } | |
| 66 void setSharedQuadState(const CCSharedQuadState*); | |
| 67 | |
| 68 protected: | |
| 69 CCDrawQuad(const CCSharedQuadState*, Material, const IntRect&); | |
| 70 | |
| 71 // Stores state common to a large bundle of quads; kept separate for memory | |
| 72 // efficiency. There is special treatment to reconstruct these pointers | |
| 73 // during serialization. | |
| 74 const CCSharedQuadState* m_sharedQuadState; | |
| 75 int m_sharedQuadStateId; | |
| 76 | |
| 77 Material m_material; | |
| 78 IntRect m_quadRect; | |
| 79 IntRect m_quadVisibleRect; | |
| 80 | |
| 81 // By default, the shared quad state determines whether or not this quad is | |
| 82 // opaque or needs blending. Derived classes can override with these | |
| 83 // variables. | |
| 84 bool m_quadOpaque; | |
| 85 bool m_needsBlending; | |
| 86 | |
| 87 // Be default, this rect is empty. It is used when the shared quad state and
above | |
| 88 // variables determine that the quad is not fully opaque but may be partiall
y opaque. | |
| 89 IntRect m_opaqueRect; | |
| 90 }; | |
| 91 | |
| 92 #pragma pack(pop) | |
| 93 | |
| 94 } | |
| 95 | |
| 96 #endif | |
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