gfx/skia/trunk/src/gpu/GrStencilBuffer.h@6474c204b198 (annotated)
gfx/skia/trunk/src/gpu/GrStencilBuffer.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2011 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | #ifndef GrStencilBuffer_DEFINED |
| michael@0 | 11 | #define GrStencilBuffer_DEFINED |
| michael@0 | 12 | |
| michael@0 | 13 | #include "GrClipData.h" |
| michael@0 | 14 | #include "GrResource.h" |
| michael@0 | 15 | |
| michael@0 | 16 | class GrRenderTarget; |
| michael@0 | 17 | class GrResourceEntry; |
| michael@0 | 18 | class GrResourceKey; |
| michael@0 | 19 | |
| michael@0 | 20 | class GrStencilBuffer : public GrResource { |
| michael@0 | 21 | public: |
| michael@0 | 22 | SK_DECLARE_INST_COUNT(GrStencilBuffer); |
| michael@0 | 23 | |
| michael@0 | 24 | virtual ~GrStencilBuffer() { |
| michael@0 | 25 | // TODO: allow SB to be purged and detach itself from rts |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | int width() const { return fWidth; } |
| michael@0 | 29 | int height() const { return fHeight; } |
| michael@0 | 30 | int bits() const { return fBits; } |
| michael@0 | 31 | int numSamples() const { return fSampleCnt; } |
| michael@0 | 32 | |
| michael@0 | 33 | // called to note the last clip drawn to this buffer. |
| michael@0 | 34 | void setLastClip(int32_t clipStackGenID, |
| michael@0 | 35 | const SkIRect& clipSpaceRect, |
| michael@0 | 36 | const SkIPoint clipSpaceToStencilOffset) { |
| michael@0 | 37 | fLastClipStackGenID = clipStackGenID; |
| michael@0 | 38 | fLastClipStackRect = clipSpaceRect; |
| michael@0 | 39 | fLastClipSpaceOffset = clipSpaceToStencilOffset; |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | // called to determine if we have to render the clip into SB. |
| michael@0 | 43 | bool mustRenderClip(int32_t clipStackGenID, |
| michael@0 | 44 | const SkIRect& clipSpaceRect, |
| michael@0 | 45 | const SkIPoint clipSpaceToStencilOffset) const { |
| michael@0 | 46 | return fLastClipStackGenID != clipStackGenID || |
| michael@0 | 47 | fLastClipSpaceOffset != clipSpaceToStencilOffset || |
| michael@0 | 48 | !fLastClipStackRect.contains(clipSpaceRect); |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | // Places the sb in the cache. The cache takes a ref of the stencil buffer. |
| michael@0 | 52 | void transferToCache(); |
| michael@0 | 53 | |
| michael@0 | 54 | static GrResourceKey ComputeKey(int width, int height, int sampleCnt); |
| michael@0 | 55 | |
| michael@0 | 56 | protected: |
| michael@0 | 57 | GrStencilBuffer(GrGpu* gpu, bool isWrapped, int width, int height, int bits, int sampleCnt) |
| michael@0 | 58 | : GrResource(gpu, isWrapped) |
| michael@0 | 59 | , fWidth(width) |
| michael@0 | 60 | , fHeight(height) |
| michael@0 | 61 | , fBits(bits) |
| michael@0 | 62 | , fSampleCnt(sampleCnt) |
| michael@0 | 63 | , fLastClipStackGenID(SkClipStack::kInvalidGenID) { |
| michael@0 | 64 | fLastClipStackRect.setEmpty(); |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | private: |
| michael@0 | 68 | |
| michael@0 | 69 | int fWidth; |
| michael@0 | 70 | int fHeight; |
| michael@0 | 71 | int fBits; |
| michael@0 | 72 | int fSampleCnt; |
| michael@0 | 73 | |
| michael@0 | 74 | int32_t fLastClipStackGenID; |
| michael@0 | 75 | SkIRect fLastClipStackRect; |
| michael@0 | 76 | SkIPoint fLastClipSpaceOffset; |
| michael@0 | 77 | |
| michael@0 | 78 | typedef GrResource INHERITED; |
| michael@0 | 79 | }; |
| michael@0 | 80 | |
| michael@0 | 81 | #endif |
