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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 #ifndef GrRenderTarget_DEFINED | 8 #ifndef GrRenderTarget_DEFINED |
9 #define GrRenderTarget_DEFINED | 9 #define GrRenderTarget_DEFINED |
10 | 10 |
11 #include "GrSurface.h" | 11 #include "GrSurface.h" |
12 #include "SkRect.h" | 12 #include "SkRect.h" |
13 | 13 |
14 class GrStencilBuffer; | 14 class GrStencilBuffer; |
| 15 class GrRenderTargetPriv; |
15 | 16 |
16 /** | 17 /** |
17 * GrRenderTarget represents a 2D buffer of pixels that can be rendered to. | 18 * GrRenderTarget represents a 2D buffer of pixels that can be rendered to. |
18 * A context's render target is set by setRenderTarget(). Render targets are | 19 * A context's render target is set by setRenderTarget(). Render targets are |
19 * created by a createTexture with the kRenderTarget_SurfaceFlag flag. | 20 * created by a createTexture with the kRenderTarget_SurfaceFlag flag. |
20 * Additionally, GrContext provides methods for creating GrRenderTargets | 21 * Additionally, GrContext provides methods for creating GrRenderTargets |
21 * that wrap externally created render targets. | 22 * that wrap externally created render targets. |
22 */ | 23 */ |
23 class GrRenderTarget : virtual public GrSurface { | 24 class GrRenderTarget : virtual public GrSurface { |
24 public: | 25 public: |
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81 // a MSAA RT may require explicit resolving , it may auto-resolve (e.g. FBO | 82 // a MSAA RT may require explicit resolving , it may auto-resolve (e.g. FBO |
82 // 0 in GL), or be unresolvable because the client didn't give us the | 83 // 0 in GL), or be unresolvable because the client didn't give us the |
83 // resolve destination. | 84 // resolve destination. |
84 enum ResolveType { | 85 enum ResolveType { |
85 kCanResolve_ResolveType, | 86 kCanResolve_ResolveType, |
86 kAutoResolves_ResolveType, | 87 kAutoResolves_ResolveType, |
87 kCantResolve_ResolveType, | 88 kCantResolve_ResolveType, |
88 }; | 89 }; |
89 virtual ResolveType getResolveType() const = 0; | 90 virtual ResolveType getResolveType() const = 0; |
90 | 91 |
91 /** | 92 // Provides access to functions that aren't part of the public API. |
92 * GrStencilBuffer is not part of the public API. | 93 GrRenderTargetPriv renderTargetPriv(); |
93 */ | 94 const GrRenderTargetPriv renderTargetPriv() const; |
94 GrStencilBuffer* getStencilBuffer() const { return fStencilBuffer; } | |
95 void setStencilBuffer(GrStencilBuffer* stencilBuffer); | |
96 | 95 |
97 protected: | 96 protected: |
98 GrRenderTarget(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc) | 97 GrRenderTarget(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc) |
99 : INHERITED(gpu, lifeCycle, desc) | 98 : INHERITED(gpu, lifeCycle, desc) |
100 , fStencilBuffer(NULL) { | 99 , fStencilBuffer(NULL) { |
101 fResolveRect.setLargestInverted(); | 100 fResolveRect.setLargestInverted(); |
102 } | 101 } |
103 | 102 |
104 // override of GrResource | 103 // override of GrResource |
105 void onAbandon() SK_OVERRIDE; | 104 void onAbandon() SK_OVERRIDE; |
106 void onRelease() SK_OVERRIDE; | 105 void onRelease() SK_OVERRIDE; |
107 | 106 |
108 private: | 107 private: |
| 108 // Checked when this object is asked to attach a stencil buffer. |
| 109 virtual bool canAttemptStencilAttachment() const = 0; |
| 110 |
| 111 friend class GrRenderTargetPriv; |
| 112 |
109 GrStencilBuffer* fStencilBuffer; | 113 GrStencilBuffer* fStencilBuffer; |
110 | 114 |
111 SkIRect fResolveRect; | 115 SkIRect fResolveRect; |
112 | 116 |
113 typedef GrSurface INHERITED; | 117 typedef GrSurface INHERITED; |
114 }; | 118 }; |
115 | 119 |
116 #endif | 120 #endif |
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