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1 /*
2 * Copyright 2018 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 GrMtlStencil_DEFINED
9 #define GrMtlStencil_DEFINED
10 
11 #include "src/gpu/GrStencilAttachment.h"
12 
13 #import <Metal/Metal.h>
14 
15 class GrMtlImageView;
16 class GrMtlGpu;
17 
18 class GrMtlStencilAttachment : public GrStencilAttachment {
19 public:
20     struct Format {
21         MTLPixelFormat fInternalFormat;
22         int  fStencilBits;
23         int  fTotalBits;
24         bool fPacked;
25     };
26 
27     static GrMtlStencilAttachment* Create(GrMtlGpu* gpu, int width, int height,
28                                           int sampleCnt, const Format& format);
29 
30     ~GrMtlStencilAttachment() override;
31 
mtlFormat()32     MTLPixelFormat mtlFormat() const { return fFormat.fInternalFormat; }
33 
stencilView()34     id<MTLTexture> stencilView() const { return fStencilView; }
35 
36 protected:
37     void onRelease() override;
38     void onAbandon() override;
39 
40 private:
41     size_t onGpuMemorySize() const override;
42 
43     GrMtlStencilAttachment(GrMtlGpu* gpu,
44                            const Format& format,
45                            const id<MTLTexture> stencilView);
46 
47     GrMtlGpu* getMtlGpu() const;
48 
49     Format fFormat;
50 
51     id<MTLTexture> fStencilView;
52 };
53 
54 #endif
55