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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 |
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114 const SkIRect& getResolveRect() const { return fResolveRect; } | 114 const SkIRect& getResolveRect() const { return fResolveRect; } |
115 | 115 |
116 /** | 116 /** |
117 * If the render target is multisampled this will perform a multisample | 117 * If the render target is multisampled this will perform a multisample |
118 * resolve. Any pending draws to the target are first flushed. This only | 118 * resolve. Any pending draws to the target are first flushed. This only |
119 * applies to render targets that are associated with GrTextures. After the | 119 * applies to render targets that are associated with GrTextures. After the |
120 * function returns the GrTexture will contain the resolved pixels. | 120 * function returns the GrTexture will contain the resolved pixels. |
121 */ | 121 */ |
122 void resolve(); | 122 void resolve(); |
123 | 123 |
| 124 /** |
| 125 * Provide a performance hint that the render target's contents are allowed |
| 126 * to become undefined. |
| 127 */ |
| 128 void discard(); |
| 129 |
124 // a MSAA RT may require explicit resolving , it may auto-resolve (e.g. FBO | 130 // a MSAA RT may require explicit resolving , it may auto-resolve (e.g. FBO |
125 // 0 in GL), or be unresolvable because the client didn't give us the | 131 // 0 in GL), or be unresolvable because the client didn't give us the |
126 // resolve destination. | 132 // resolve destination. |
127 enum ResolveType { | 133 enum ResolveType { |
128 kCanResolve_ResolveType, | 134 kCanResolve_ResolveType, |
129 kAutoResolves_ResolveType, | 135 kAutoResolves_ResolveType, |
130 kCantResolve_ResolveType, | 136 kCantResolve_ResolveType, |
131 }; | 137 }; |
132 virtual ResolveType getResolveType() const = 0; | 138 virtual ResolveType getResolveType() const = 0; |
133 | 139 |
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162 | 168 |
163 GrStencilBuffer* fStencilBuffer; | 169 GrStencilBuffer* fStencilBuffer; |
164 GrTexture* fTexture; // not ref'ed | 170 GrTexture* fTexture; // not ref'ed |
165 | 171 |
166 SkIRect fResolveRect; | 172 SkIRect fResolveRect; |
167 | 173 |
168 typedef GrSurface INHERITED; | 174 typedef GrSurface INHERITED; |
169 }; | 175 }; |
170 | 176 |
171 #endif | 177 #endif |
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