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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 GrDrawTarget; |
14 class GrStencilAttachment; | 15 class GrStencilAttachment; |
15 class GrRenderTargetPriv; | 16 class GrRenderTargetPriv; |
16 | 17 |
17 /** | 18 /** |
18 * GrRenderTarget represents a 2D buffer of pixels that can be rendered to. | 19 * GrRenderTarget represents a 2D buffer of pixels that can be rendered to. |
19 * A context's render target is set by setRenderTarget(). Render targets are | 20 * A context's render target is set by setRenderTarget(). Render targets are |
20 * created by a createTexture with the kRenderTarget_SurfaceFlag flag. | 21 * created by a createTexture with the kRenderTarget_SurfaceFlag flag. |
21 * Additionally, GrContext provides methods for creating GrRenderTargets | 22 * Additionally, GrContext provides methods for creating GrRenderTargets |
22 * that wrap externally created render targets. | 23 * that wrap externally created render targets. |
23 */ | 24 */ |
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144 */ | 145 */ |
145 virtual GrBackendObject getRenderTargetHandle() const = 0; | 146 virtual GrBackendObject getRenderTargetHandle() const = 0; |
146 | 147 |
147 // Checked when this object is asked to attach a stencil buffer. | 148 // Checked when this object is asked to attach a stencil buffer. |
148 virtual bool canAttemptStencilAttachment() const = 0; | 149 virtual bool canAttemptStencilAttachment() const = 0; |
149 | 150 |
150 // Provides access to functions that aren't part of the public API. | 151 // Provides access to functions that aren't part of the public API. |
151 GrRenderTargetPriv renderTargetPriv(); | 152 GrRenderTargetPriv renderTargetPriv(); |
152 const GrRenderTargetPriv renderTargetPriv() const; | 153 const GrRenderTargetPriv renderTargetPriv() const; |
153 | 154 |
| 155 void setLastDrawTarget(GrDrawTarget* dt); |
| 156 GrDrawTarget* getLastDrawTarget() { return fLastDrawTarget; } |
| 157 |
154 protected: | 158 protected: |
155 GrRenderTarget(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc, | 159 GrRenderTarget(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc, |
156 SampleConfig sampleConfig, GrStencilAttachment* stencil = nul
lptr) | 160 SampleConfig sampleConfig, GrStencilAttachment* stencil = nul
lptr) |
157 : INHERITED(gpu, lifeCycle, desc) | 161 : INHERITED(gpu, lifeCycle, desc) |
158 , fStencilAttachment(stencil) | 162 , fStencilAttachment(stencil) |
159 , fSampleConfig(sampleConfig) { | 163 , fSampleConfig(sampleConfig) |
| 164 , fLastDrawTarget(nullptr) { |
160 fResolveRect.setLargestInverted(); | 165 fResolveRect.setLargestInverted(); |
161 } | 166 } |
162 | 167 |
163 // override of GrResource | 168 // override of GrResource |
164 void onAbandon() override; | 169 void onAbandon() override; |
165 void onRelease() override; | 170 void onRelease() override; |
166 | 171 |
167 private: | 172 private: |
168 // Allows the backends to perform any additional work that is required for a
ttaching a | 173 // Allows the backends to perform any additional work that is required for a
ttaching a |
169 // GrStencilAttachment. When this is called, the GrStencilAttachment has alr
eady been put onto | 174 // GrStencilAttachment. When this is called, the GrStencilAttachment has alr
eady been put onto |
170 // the GrRenderTarget. This function must return false if any failures occur
when completing the | 175 // the GrRenderTarget. This function must return false if any failures occur
when completing the |
171 // stencil attachment. | 176 // stencil attachment. |
172 virtual bool completeStencilAttachment() = 0; | 177 virtual bool completeStencilAttachment() = 0; |
173 | 178 |
174 friend class GrRenderTargetPriv; | 179 friend class GrRenderTargetPriv; |
175 | 180 |
176 GrStencilAttachment* fStencilAttachment; | 181 GrStencilAttachment* fStencilAttachment; |
177 SampleConfig fSampleConfig; | 182 SampleConfig fSampleConfig; |
178 | 183 |
179 SkIRect fResolveRect; | 184 SkIRect fResolveRect; |
180 | 185 |
| 186 // The last drawTarget that wrote to or is currently going to write to this
renderTarget |
| 187 // The drawTarget can be closed (e.g., no draw context is currently bound |
| 188 // to this renderTarget). |
| 189 // This back-pointer is required so that we can add a dependancy between |
| 190 // the drawTarget used to create the current contents of this renderTarget |
| 191 // and the drawTarget of a destination renderTarget to which this one is bei
ng drawn. |
| 192 GrDrawTarget* fLastDrawTarget; |
| 193 |
181 typedef GrSurface INHERITED; | 194 typedef GrSurface INHERITED; |
182 }; | 195 }; |
183 | 196 |
184 | 197 |
185 #endif | 198 #endif |
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