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comparison: gfx/skia/trunk/src/gpu/GrStencilBuffer.h
gfx/skia/trunk/src/gpu/GrStencilBuffer.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:d4ddc198355e |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef GrStencilBuffer_DEFINED | |
| 11 #define GrStencilBuffer_DEFINED | |
| 12 | |
| 13 #include "GrClipData.h" | |
| 14 #include "GrResource.h" | |
| 15 | |
| 16 class GrRenderTarget; | |
| 17 class GrResourceEntry; | |
| 18 class GrResourceKey; | |
| 19 | |
| 20 class GrStencilBuffer : public GrResource { | |
| 21 public: | |
| 22 SK_DECLARE_INST_COUNT(GrStencilBuffer); | |
| 23 | |
| 24 virtual ~GrStencilBuffer() { | |
| 25 // TODO: allow SB to be purged and detach itself from rts | |
| 26 } | |
| 27 | |
| 28 int width() const { return fWidth; } | |
| 29 int height() const { return fHeight; } | |
| 30 int bits() const { return fBits; } | |
| 31 int numSamples() const { return fSampleCnt; } | |
| 32 | |
| 33 // called to note the last clip drawn to this buffer. | |
| 34 void setLastClip(int32_t clipStackGenID, | |
| 35 const SkIRect& clipSpaceRect, | |
| 36 const SkIPoint clipSpaceToStencilOffset) { | |
| 37 fLastClipStackGenID = clipStackGenID; | |
| 38 fLastClipStackRect = clipSpaceRect; | |
| 39 fLastClipSpaceOffset = clipSpaceToStencilOffset; | |
| 40 } | |
| 41 | |
| 42 // called to determine if we have to render the clip into SB. | |
| 43 bool mustRenderClip(int32_t clipStackGenID, | |
| 44 const SkIRect& clipSpaceRect, | |
| 45 const SkIPoint clipSpaceToStencilOffset) const { | |
| 46 return fLastClipStackGenID != clipStackGenID || | |
| 47 fLastClipSpaceOffset != clipSpaceToStencilOffset || | |
| 48 !fLastClipStackRect.contains(clipSpaceRect); | |
| 49 } | |
| 50 | |
| 51 // Places the sb in the cache. The cache takes a ref of the stencil buffer. | |
| 52 void transferToCache(); | |
| 53 | |
| 54 static GrResourceKey ComputeKey(int width, int height, int sampleCnt); | |
| 55 | |
| 56 protected: | |
| 57 GrStencilBuffer(GrGpu* gpu, bool isWrapped, int width, int height, int bits, int sampleCnt) | |
| 58 : GrResource(gpu, isWrapped) | |
| 59 , fWidth(width) | |
| 60 , fHeight(height) | |
| 61 , fBits(bits) | |
| 62 , fSampleCnt(sampleCnt) | |
| 63 , fLastClipStackGenID(SkClipStack::kInvalidGenID) { | |
| 64 fLastClipStackRect.setEmpty(); | |
| 65 } | |
| 66 | |
| 67 private: | |
| 68 | |
| 69 int fWidth; | |
| 70 int fHeight; | |
| 71 int fBits; | |
| 72 int fSampleCnt; | |
| 73 | |
| 74 int32_t fLastClipStackGenID; | |
| 75 SkIRect fLastClipStackRect; | |
| 76 SkIPoint fLastClipSpaceOffset; | |
| 77 | |
| 78 typedef GrResource INHERITED; | |
| 79 }; | |
| 80 | |
| 81 #endif |
