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 GrMtlBuffer_DEFINED
9 #define GrMtlBuffer_DEFINED
10 
11 #include "src/gpu/GrGpuBuffer.h"
12 #include "src/gpu/mtl/GrMtlUniformHandler.h"
13 
14 #import <Metal/Metal.h>
15 
16 class GrMtlCaps;
17 class GrMtlGpu;
18 
19 class GrMtlBuffer: public GrGpuBuffer {
20 public:
21     static sk_sp<GrMtlBuffer> Make(GrMtlGpu*, size_t size, GrGpuBufferType intendedType,
22                                    GrAccessPattern, const void* data = nullptr);
23 
24     ~GrMtlBuffer() override;
25 
mtlBuffer()26     id<MTLBuffer> mtlBuffer() const { return fMtlBuffer; }
offset()27     size_t offset() const { return fOffset; }
28     void bind(); // for initial binding of XferGpuToCpu buffers
29 
30 protected:
31     GrMtlBuffer(GrMtlGpu*, size_t size, GrGpuBufferType intendedType, GrAccessPattern);
32 
33     void onAbandon() override;
34     void onRelease() override;
35 
36 private:
37     GrMtlGpu* mtlGpu() const;
38 
39     void onMap() override;
40     void onUnmap() override;
41     bool onUpdateData(const void* src, size_t srcSizeInBytes) override;
42 
43     void internalMap(size_t sizeInBytes);
44     void internalUnmap(size_t sizeInBytes);
45 
46 #ifdef SK_DEBUG
47     void validate() const;
48 #endif
49 
50     bool fIsDynamic;
51     id<MTLBuffer> fMtlBuffer;
52     size_t        fOffset;       // offset into shared buffer for dynamic buffers
53     id<MTLBuffer> fMappedBuffer; // buffer used by static buffers for uploads
54 
55     typedef GrGpuBuffer INHERITED;
56 };
57 
58 #endif
59