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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 #ifndef GrClipMaskManager_DEFINED | 7 #ifndef GrClipMaskManager_DEFINED |
8 #define GrClipMaskManager_DEFINED | 8 #define GrClipMaskManager_DEFINED |
9 | 9 |
10 #include "GrClipMaskCache.h" | 10 #include "GrClipMaskCache.h" |
11 #include "GrContext.h" | |
12 #include "GrPipelineBuilder.h" | 11 #include "GrPipelineBuilder.h" |
13 #include "GrReducedClip.h" | 12 #include "GrReducedClip.h" |
14 #include "GrStencil.h" | 13 #include "GrStencil.h" |
15 #include "GrTexture.h" | 14 #include "GrTexture.h" |
16 #include "SkClipStack.h" | 15 #include "SkClipStack.h" |
17 #include "SkDeque.h" | 16 #include "SkDeque.h" |
18 #include "SkPath.h" | 17 #include "SkPath.h" |
19 #include "SkRefCnt.h" | 18 #include "SkRefCnt.h" |
20 #include "SkTLList.h" | 19 #include "SkTLList.h" |
21 #include "SkTypes.h" | 20 #include "SkTypes.h" |
22 | 21 |
23 class GrClipTarget; | 22 class GrClipTarget; |
24 class GrPathRenderer; | 23 class GrPathRenderer; |
25 class GrPathRendererChain; | 24 class GrPathRendererChain; |
26 class GrTexture; | 25 class GrTexture; |
27 class SkPath; | 26 class SkPath; |
28 /** | 27 /** |
29 * The clip mask creator handles the generation of the clip mask. If anti | 28 * The clip mask creator handles the generation of the clip mask. If anti |
30 * aliasing is requested it will (in the future) generate a single channel | 29 * aliasing is requested it will (in the future) generate a single channel |
31 * (8bit) mask. If no anti aliasing is requested it will generate a 1-bit | 30 * (8bit) mask. If no anti aliasing is requested it will generate a 1-bit |
32 * mask in the stencil buffer. In the non anti-aliasing case, if the clip | 31 * mask in the stencil buffer. In the non anti-aliasing case, if the clip |
33 * mask can be represented as a rectangle then scissoring is used. In all | 32 * mask can be represented as a rectangle then scissoring is used. In all |
34 * cases scissoring is used to bound the range of the clip mask. | 33 * cases scissoring is used to bound the range of the clip mask. |
35 */ | 34 */ |
36 class GrClipMaskManager : SkNoncopyable { | 35 class GrClipMaskManager : SkNoncopyable { |
37 public: | 36 public: |
38 GrClipMaskManager() | 37 GrClipMaskManager(GrClipTarget* owner); |
39 : fCurrClipMaskType(kNone_ClipMaskType) | |
40 , fClipTarget(NULL) | |
41 , fClipMode(kIgnoreClip_StencilClipMode) { | |
42 } | |
43 | 38 |
44 /** | 39 /** |
45 * Creates a clip mask if necessary as a stencil buffer or alpha texture | 40 * Creates a clip mask if necessary as a stencil buffer or alpha texture |
46 * and sets the GrGpu's scissor and stencil state. If the return is false | 41 * and sets the GrGpu's scissor and stencil state. If the return is false |
47 * then the draw can be skipped. The AutoRestoreEffects is initialized by | 42 * then the draw can be skipped. The AutoRestoreEffects is initialized by |
48 * the manager when it must install additional effects to implement the | 43 * the manager when it must install additional effects to implement the |
49 * clip. devBounds is optional but can help optimize clipping. | 44 * clip. devBounds is optional but can help optimize clipping. |
50 */ | 45 */ |
51 bool setupClipping(GrPipelineBuilder*, | 46 bool setupClipping(GrPipelineBuilder*, |
52 GrPipelineBuilder::AutoRestoreFragmentProcessors*, | 47 GrPipelineBuilder::AutoRestoreFragmentProcessors*, |
53 GrPipelineBuilder::AutoRestoreStencil*, | 48 GrPipelineBuilder::AutoRestoreStencil*, |
54 GrScissorState*, | 49 GrScissorState*, |
55 const SkRect* devBounds); | 50 const SkRect* devBounds); |
56 | 51 |
57 /** | 52 /** |
58 * Purge resources to free up memory. TODO: This class shouldn't hold any lo
ng lived refs | 53 * Purge resources to free up memory. TODO: This class shouldn't hold any lo
ng lived refs |
59 * which will allow Resourcecache to automatically purge anything this class
has created. | 54 * which will allow Resourcecache to automatically purge anything this class
has created. |
60 */ | 55 */ |
61 void purgeResources(); | 56 void purgeResources(); |
62 | 57 |
63 bool isClipInStencil() const { | 58 bool isClipInStencil() const { |
64 return kStencil_ClipMaskType == fCurrClipMaskType; | 59 return kStencil_ClipMaskType == fCurrClipMaskType; |
65 } | 60 } |
66 | 61 |
67 bool isClipInAlpha() const { | 62 bool isClipInAlpha() const { |
68 return kAlpha_ClipMaskType == fCurrClipMaskType; | 63 return kAlpha_ClipMaskType == fCurrClipMaskType; |
69 } | 64 } |
70 | 65 |
71 GrContext* getContext() { | |
72 return fAACache.getContext(); | |
73 } | |
74 | |
75 void setClipTarget(GrClipTarget*); | 66 void setClipTarget(GrClipTarget*); |
76 | 67 |
77 void adjustPathStencilParams(const GrStencilAttachment*, GrStencilSettings*)
; | 68 void adjustPathStencilParams(const GrStencilAttachment*, GrStencilSettings*)
; |
78 | 69 |
79 private: | 70 private: |
| 71 inline GrContext* getContext(); |
| 72 |
80 /** | 73 /** |
81 * Informs the helper function adjustStencilParams() about how the stencil | 74 * Informs the helper function adjustStencilParams() about how the stencil |
82 * buffer clip is being used. | 75 * buffer clip is being used. |
83 */ | 76 */ |
84 enum StencilClipMode { | 77 enum StencilClipMode { |
85 // Draw to the clip bit of the stencil buffer | 78 // Draw to the clip bit of the stencil buffer |
86 kModifyClip_StencilClipMode, | 79 kModifyClip_StencilClipMode, |
87 // Clip against the existing representation of the clip in the high bit | 80 // Clip against the existing representation of the clip in the high bit |
88 // of the stencil buffer. | 81 // of the stencil buffer. |
89 kRespectClip_StencilClipMode, | 82 kRespectClip_StencilClipMode, |
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183 * texture. It may be neither because the scissor rect suffices or we | 176 * texture. It may be neither because the scissor rect suffices or we |
184 * haven't yet examined the clip. | 177 * haven't yet examined the clip. |
185 */ | 178 */ |
186 enum ClipMaskType { | 179 enum ClipMaskType { |
187 kNone_ClipMaskType, | 180 kNone_ClipMaskType, |
188 kStencil_ClipMaskType, | 181 kStencil_ClipMaskType, |
189 kAlpha_ClipMaskType, | 182 kAlpha_ClipMaskType, |
190 } fCurrClipMaskType; | 183 } fCurrClipMaskType; |
191 | 184 |
192 GrClipMaskCache fAACache; // cache for the AA path | 185 GrClipMaskCache fAACache; // cache for the AA path |
193 GrClipTarget* fClipTarget; | 186 GrClipTarget* fClipTarget; // This is our owning clip target. |
194 StencilClipMode fClipMode; | 187 StencilClipMode fClipMode; |
195 | 188 |
196 typedef SkNoncopyable INHERITED; | 189 typedef SkNoncopyable INHERITED; |
197 }; | 190 }; |
198 #endif // GrClipMaskManager_DEFINED | 191 #endif // GrClipMaskManager_DEFINED |
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