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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 
9 #ifndef GrGLStencilAttachment_DEFINED
10 #define GrGLStencilAttachment_DEFINED
11 
12 #include "gl/GrGLInterface.h"
13 #include "GrStencilAttachment.h"
14 
15 class GrGLStencilAttachment : public GrStencilAttachment {
16 public:
17     static const GrGLenum kUnknownInternalFormat = ~0U;
18     static const GrGLuint kUnknownBitCount = ~0U;
19     struct Format {
20         GrGLenum  fInternalFormat;
21         GrGLuint  fStencilBits;
22         GrGLuint  fTotalBits;
23         bool      fPacked;
24     };
25 
26     struct IDDesc {
IDDescIDDesc27         IDDesc() : fRenderbufferID(0) {}
28         GrGLuint fRenderbufferID;
29     };
30 
GrGLStencilAttachment(GrGpu * gpu,const IDDesc & idDesc,int width,int height,int sampleCnt,const Format & format)31     GrGLStencilAttachment(GrGpu* gpu,
32                           const IDDesc& idDesc,
33                           int width, int height,
34                           int sampleCnt,
35                           const Format& format)
36         : GrStencilAttachment(gpu, width, height, format.fStencilBits, sampleCnt)
37         , fFormat(format)
38         , fRenderbufferID(idDesc.fRenderbufferID) {
39         this->registerWithCache(SkBudgeted::kYes);
40     }
41 
renderbufferID()42     GrGLuint renderbufferID() const {
43         return fRenderbufferID;
44     }
45 
format()46     const Format& format() const { return fFormat; }
47 
48 protected:
49     // overrides of GrResource
50     void onRelease() override;
51     void onAbandon() override;
52     void setMemoryBacking(SkTraceMemoryDump* traceMemoryDump,
53                           const SkString& dumpName) const override;
54 
55 private:
56     size_t onGpuMemorySize() const override;
57 
58     Format fFormat;
59     // may be zero for external SBs associated with external RTs
60     // (we don't require the client to give us the id, just tell
61     // us how many bits of stencil there are).
62     GrGLuint fRenderbufferID;
63 
64     typedef GrStencilAttachment INHERITED;
65 };
66 
67 #endif
68