1//
2// Copyright 2014 The ANGLE Project Authors. All rights reserved.
3// Use of this source code is governed by a BSD-style license that can be
4// found in the LICENSE file.
5//
6
7// Buffer11.h: Defines the rx::Buffer11 class which implements rx::BufferImpl via rx::BufferD3D.
8
9#ifndef LIBGLESV2_RENDERER_BUFFER11_H_
10#define LIBGLESV2_RENDERER_BUFFER11_H_
11
12#include "libGLESv2/renderer/d3d/BufferD3D.h"
13#include "libGLESv2/renderer/d3d/MemoryBuffer.h"
14#include "libGLESv2/angletypes.h"
15
16namespace rx
17{
18class Renderer11;
19
20enum BufferUsage
21{
22    BUFFER_USAGE_STAGING,
23    BUFFER_USAGE_VERTEX_OR_TRANSFORM_FEEDBACK,
24    BUFFER_USAGE_INDEX,
25    BUFFER_USAGE_PIXEL_UNPACK,
26    BUFFER_USAGE_PIXEL_PACK,
27    BUFFER_USAGE_UNIFORM,
28};
29
30struct PackPixelsParams
31{
32    PackPixelsParams();
33    PackPixelsParams(const gl::Rectangle &area, GLenum format, GLenum type, GLuint outputPitch,
34                     const gl::PixelPackState &pack, ptrdiff_t offset);
35
36    gl::Rectangle area;
37    GLenum format;
38    GLenum type;
39    GLuint outputPitch;
40    gl::Buffer *packBuffer;
41    gl::PixelPackState pack;
42    ptrdiff_t offset;
43};
44
45typedef size_t DataRevision;
46
47class Buffer11 : public BufferD3D
48{
49  public:
50    Buffer11(rx::Renderer11 *renderer);
51    virtual ~Buffer11();
52
53    static Buffer11 *makeBuffer11(BufferImpl *buffer);
54
55    ID3D11Buffer *getBuffer(BufferUsage usage);
56    ID3D11ShaderResourceView *getSRV(DXGI_FORMAT srvFormat);
57    bool isMapped() const { return mMappedStorage != NULL; }
58    gl::Error packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
59
60    // BufferD3D implementation
61    virtual size_t getSize() const { return mSize; }
62    virtual bool supportsDirectBinding() const;
63    virtual Renderer* getRenderer();
64
65    // BufferImpl implementation
66    virtual gl::Error setData(const void* data, size_t size, GLenum usage);
67    virtual void *getData();
68    virtual gl::Error setSubData(const void* data, size_t size, size_t offset);
69    virtual gl::Error copySubData(BufferImpl* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size);
70    virtual gl::Error map(size_t offset, size_t length, GLbitfield access, GLvoid **mapPtr);
71    virtual gl::Error unmap();
72    virtual void markTransformFeedbackUsage();
73
74  private:
75    DISALLOW_COPY_AND_ASSIGN(Buffer11);
76
77    class BufferStorage11;
78    class NativeBuffer11;
79    class PackStorage11;
80
81    rx::Renderer11 *mRenderer;
82    size_t mSize;
83
84    BufferStorage11 *mMappedStorage;
85
86    std::map<BufferUsage, BufferStorage11*> mBufferStorages;
87
88    typedef std::pair<ID3D11Buffer *, ID3D11ShaderResourceView *> BufferSRVPair;
89    std::map<DXGI_FORMAT, BufferSRVPair> mBufferResourceViews;
90
91    MemoryBuffer mResolvedData;
92    DataRevision mResolvedDataRevision;
93    unsigned int mReadUsageCount;
94
95    void markBufferUsage();
96    NativeBuffer11 *getStagingBuffer();
97    PackStorage11 *getPackStorage();
98
99    BufferStorage11 *getBufferStorage(BufferUsage usage);
100    BufferStorage11 *getLatestBufferStorage() const;
101};
102
103}
104
105#endif // LIBGLESV2_RENDERER_BUFFER11_H_
106