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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 GrPathRendererChain_DEFINED | 8 #ifndef GrPathRendererChain_DEFINED |
9 #define GrPathRendererChain_DEFINED | 9 #define GrPathRendererChain_DEFINED |
10 | 10 |
| 11 #include "GrPathRenderer.h" |
| 12 |
11 #include "SkRefCnt.h" | 13 #include "SkRefCnt.h" |
12 #include "SkTArray.h" | 14 #include "SkTArray.h" |
13 | 15 |
14 class GrContext; | 16 class GrContext; |
15 class GrPathRenderer; | |
16 class GrPipelineBuilder; | 17 class GrPipelineBuilder; |
17 class GrShaderCaps; | 18 class GrShaderCaps; |
18 class GrStrokeInfo; | 19 class GrStrokeInfo; |
19 class SkMatrix; | 20 class SkMatrix; |
20 class SkPath; | 21 class SkPath; |
21 | 22 |
22 /** | 23 /** |
23 * Keeps track of an ordered list of path renderers. When a path needs to be | 24 * Keeps track of an ordered list of path renderers. When a path needs to be |
24 * drawn this list is scanned to find the most preferred renderer. To add your | 25 * drawn this list is scanned to find the most preferred renderer. To add your |
25 * path renderer to the list implement the GrPathRenderer::AddPathRenderers | 26 * path renderer to the list implement the GrPathRenderer::AddPathRenderers |
26 * function. | 27 * function. |
27 */ | 28 */ |
28 class GrPathRendererChain : public SkRefCnt { | 29 class GrPathRendererChain : public SkRefCnt { |
29 public: | 30 public: |
30 // See comments in GrPathRenderer.h | |
31 enum StencilSupport { | |
32 kNoSupport_StencilSupport, | |
33 kStencilOnly_StencilSupport, | |
34 kNoRestriction_StencilSupport, | |
35 }; | |
36 | |
37 GrPathRendererChain(GrContext* context); | 31 GrPathRendererChain(GrContext* context); |
38 | 32 |
39 ~GrPathRendererChain(); | 33 ~GrPathRendererChain(); |
40 | 34 |
41 // takes a ref and unrefs in destructor | |
42 GrPathRenderer* addPathRenderer(GrPathRenderer* pr); | |
43 | |
44 /** Documents how the caller plans to use a GrPathRenderer to draw a path. I
t affects the PR | 35 /** Documents how the caller plans to use a GrPathRenderer to draw a path. I
t affects the PR |
45 returned by getPathRenderer */ | 36 returned by getPathRenderer */ |
46 enum DrawType { | 37 enum DrawType { |
47 kColor_DrawType, // draw to the color buffer, no AA | 38 kColor_DrawType, // draw to the color buffer, no AA |
48 kColorAntiAlias_DrawType, // draw to color buffer, with partia
l coverage AA | 39 kColorAntiAlias_DrawType, // draw to color buffer, with partia
l coverage AA |
49 kStencilOnly_DrawType, // draw just to the stencil buffer | 40 kStencilOnly_DrawType, // draw just to the stencil buffer |
50 kStencilAndColor_DrawType, // draw the stencil and color buffer
, no AA | 41 kStencilAndColor_DrawType, // draw the stencil and color buffer
, no AA |
51 kStencilAndColorAntiAlias_DrawType // draw the stencil and color buffer
, with partial | 42 kStencilAndColorAntiAlias_DrawType // draw the stencil and color buffer
, with partial |
52 // coverage AA. | 43 // coverage AA. |
53 }; | 44 }; |
| 45 |
54 /** Returns a GrPathRenderer compatible with the request if one is available
. If the caller | 46 /** Returns a GrPathRenderer compatible with the request if one is available
. If the caller |
55 is drawing the path to the stencil buffer then stencilSupport can be use
d to determine | 47 is drawing the path to the stencil buffer then stencilSupport can be use
d to determine |
56 whether the path can be rendered with arbitrary stencil rules or not. Se
e comments on | 48 whether the path can be rendered with arbitrary stencil rules or not. Se
e comments on |
57 StencilSupport in GrPathRenderer.h. */ | 49 StencilSupport in GrPathRenderer.h. */ |
58 GrPathRenderer* getPathRenderer(const GrShaderCaps* shaderCaps, | 50 GrPathRenderer* getPathRenderer(const GrPathRenderer::CanDrawPathArgs& args, |
59 const GrPipelineBuilder&, | |
60 const SkMatrix& viewMatrix, | |
61 const SkPath& path, | |
62 const GrStrokeInfo& stroke, | |
63 DrawType drawType, | 51 DrawType drawType, |
64 StencilSupport* stencilSupport); | 52 GrPathRenderer::StencilSupport* stencilSuppo
rt); |
65 | 53 |
66 private: | 54 private: |
67 GrPathRendererChain(); | 55 GrPathRendererChain(); |
68 | 56 |
| 57 // takes a ref and unrefs in destructor |
| 58 GrPathRenderer* addPathRenderer(GrPathRenderer* pr); |
| 59 |
69 void init(); | 60 void init(); |
70 | 61 |
71 enum { | 62 enum { |
72 kPreAllocCount = 8, | 63 kPreAllocCount = 8, |
73 }; | 64 }; |
74 bool fInit; | 65 bool fInit; |
75 GrContext* fOwner; | 66 GrContext* fOwner; |
76 SkSTArray<kPreAllocCount, GrPathRenderer*, true> fChain; | 67 SkSTArray<kPreAllocCount, GrPathRenderer*, true> fChain; |
77 | 68 |
78 typedef SkRefCnt INHERITED; | 69 typedef SkRefCnt INHERITED; |
79 }; | 70 }; |
80 | 71 |
81 #endif | 72 #endif |
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