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comparison: gfx/skia/trunk/include/gpu/GrPathRendererChain.h
gfx/skia/trunk/include/gpu/GrPathRendererChain.h
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:de0b0a77467c |
|---|---|
| 1 /* | |
| 2 * Copyright 2011 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #ifndef GrPathRendererChain_DEFINED | |
| 9 #define GrPathRendererChain_DEFINED | |
| 10 | |
| 11 #include "SkRefCnt.h" | |
| 12 #include "SkTArray.h" | |
| 13 | |
| 14 class GrContext; | |
| 15 class GrDrawTarget; | |
| 16 class GrPathRenderer; | |
| 17 class SkPath; | |
| 18 class SkStrokeRec; | |
| 19 | |
| 20 /** | |
| 21 * Keeps track of an ordered list of path renderers. When a path needs to be | |
| 22 * drawn this list is scanned to find the most preferred renderer. To add your | |
| 23 * path renderer to the list implement the GrPathRenderer::AddPathRenderers | |
| 24 * function. | |
| 25 */ | |
| 26 class GrPathRendererChain : public SkRefCnt { | |
| 27 public: | |
| 28 // See comments in GrPathRenderer.h | |
| 29 enum StencilSupport { | |
| 30 kNoSupport_StencilSupport, | |
| 31 kStencilOnly_StencilSupport, | |
| 32 kNoRestriction_StencilSupport, | |
| 33 }; | |
| 34 | |
| 35 SK_DECLARE_INST_COUNT(GrPathRendererChain) | |
| 36 | |
| 37 GrPathRendererChain(GrContext* context); | |
| 38 | |
| 39 ~GrPathRendererChain(); | |
| 40 | |
| 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. It affects the PR | |
| 45 returned by getPathRenderer */ | |
| 46 enum DrawType { | |
| 47 kColor_DrawType, // draw to the color buffer, no AA | |
| 48 kColorAntiAlias_DrawType, // draw to color buffer, with partial coverage AA | |
| 49 kStencilOnly_DrawType, // draw just to the stencil buffer | |
| 50 kStencilAndColor_DrawType, // draw the stencil and color buffer, no AA | |
| 51 kStencilAndColorAntiAlias_DrawType // draw the stencil and color buffer, with partial | |
| 52 // coverage AA. | |
| 53 }; | |
| 54 /** 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 used to determine | |
| 56 whether the path can be rendered with arbitrary stencil rules or not. See comments on | |
| 57 StencilSupport in GrPathRenderer.h. */ | |
| 58 GrPathRenderer* getPathRenderer(const SkPath& path, | |
| 59 const SkStrokeRec& rec, | |
| 60 const GrDrawTarget* target, | |
| 61 DrawType drawType, | |
| 62 StencilSupport* stencilSupport); | |
| 63 | |
| 64 private: | |
| 65 GrPathRendererChain(); | |
| 66 | |
| 67 void init(); | |
| 68 | |
| 69 enum { | |
| 70 kPreAllocCount = 8, | |
| 71 }; | |
| 72 bool fInit; | |
| 73 GrContext* fOwner; | |
| 74 SkSTArray<kPreAllocCount, GrPathRenderer*, true> fChain; | |
| 75 | |
| 76 typedef SkRefCnt INHERITED; | |
| 77 }; | |
| 78 | |
| 79 #endif |
