GraphicBuffer.h revision e142428a9c8b9d2380032cd4d7b55ee440fe8770 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_GRAPHIC_BUFFER_H
18#define ANDROID_GRAPHIC_BUFFER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <ui/ANativeObjectBase.h>
24#include <ui/PixelFormat.h>
25#include <ui/Rect.h>
26#include <utils/Flattenable.h>
27#include <utils/RefBase.h>
28
29
30struct ANativeWindowBuffer;
31
32namespace android {
33
34class GraphicBufferMapper;
35
36// ===========================================================================
37// GraphicBuffer
38// ===========================================================================
39
40class GraphicBuffer
41    : public ANativeObjectBase< ANativeWindowBuffer, GraphicBuffer, RefBase >,
42      public Flattenable<GraphicBuffer>
43{
44    friend class Flattenable<GraphicBuffer>;
45public:
46
47    enum {
48        USAGE_SW_READ_NEVER     = GRALLOC_USAGE_SW_READ_NEVER,
49        USAGE_SW_READ_RARELY    = GRALLOC_USAGE_SW_READ_RARELY,
50        USAGE_SW_READ_OFTEN     = GRALLOC_USAGE_SW_READ_OFTEN,
51        USAGE_SW_READ_MASK      = GRALLOC_USAGE_SW_READ_MASK,
52
53        USAGE_SW_WRITE_NEVER    = GRALLOC_USAGE_SW_WRITE_NEVER,
54        USAGE_SW_WRITE_RARELY   = GRALLOC_USAGE_SW_WRITE_RARELY,
55        USAGE_SW_WRITE_OFTEN    = GRALLOC_USAGE_SW_WRITE_OFTEN,
56        USAGE_SW_WRITE_MASK     = GRALLOC_USAGE_SW_WRITE_MASK,
57
58        USAGE_SOFTWARE_MASK     = USAGE_SW_READ_MASK|USAGE_SW_WRITE_MASK,
59
60        USAGE_PROTECTED         = GRALLOC_USAGE_PROTECTED,
61
62        USAGE_HW_TEXTURE        = GRALLOC_USAGE_HW_TEXTURE,
63        USAGE_HW_RENDER         = GRALLOC_USAGE_HW_RENDER,
64        USAGE_HW_2D             = GRALLOC_USAGE_HW_2D,
65        USAGE_HW_COMPOSER       = GRALLOC_USAGE_HW_COMPOSER,
66        USAGE_HW_VIDEO_ENCODER  = GRALLOC_USAGE_HW_VIDEO_ENCODER,
67        USAGE_HW_MASK           = GRALLOC_USAGE_HW_MASK
68    };
69
70    GraphicBuffer();
71
72    // creates w * h buffer
73    GraphicBuffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t usage);
74
75    // create a buffer from an existing handle
76    GraphicBuffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t usage,
77            uint32_t stride, native_handle_t* handle, bool keepOwnership);
78
79    // create a buffer from an existing ANativeWindowBuffer
80    GraphicBuffer(ANativeWindowBuffer* buffer, bool keepOwnership);
81
82    // return status
83    status_t initCheck() const;
84
85    uint32_t getWidth() const           { return width; }
86    uint32_t getHeight() const          { return height; }
87    uint32_t getStride() const          { return stride; }
88    uint32_t getUsage() const           { return usage; }
89    PixelFormat getPixelFormat() const  { return format; }
90    Rect getBounds() const              { return Rect(width, height); }
91
92    status_t reallocate(uint32_t w, uint32_t h, PixelFormat f, uint32_t usage);
93
94    status_t lock(uint32_t usage, void** vaddr);
95    status_t lock(uint32_t usage, const Rect& rect, void** vaddr);
96    // For HAL_PIXEL_FORMAT_YCbCr_420_888
97    status_t lockYCbCr(uint32_t usage, android_ycbcr *ycbcr);
98    status_t lockYCbCr(uint32_t usage, const Rect& rect, android_ycbcr *ycbcr);
99    status_t unlock();
100
101    ANativeWindowBuffer* getNativeBuffer() const;
102
103    void setIndex(int index);
104    int getIndex() const;
105
106    // for debugging
107    static void dumpAllocationsToSystemLog();
108
109private:
110    ~GraphicBuffer();
111
112    enum {
113        ownNone   = 0,
114        ownHandle = 1,
115        ownData   = 2,
116    };
117
118    inline const GraphicBufferMapper& getBufferMapper() const {
119        return mBufferMapper;
120    }
121    inline GraphicBufferMapper& getBufferMapper() {
122        return mBufferMapper;
123    }
124    uint8_t mOwner;
125
126private:
127    friend class Surface;
128    friend class BpSurface;
129    friend class BnSurface;
130    friend class LightRefBase<GraphicBuffer>;
131    GraphicBuffer(const GraphicBuffer& rhs);
132    GraphicBuffer& operator = (const GraphicBuffer& rhs);
133    const GraphicBuffer& operator = (const GraphicBuffer& rhs) const;
134
135    status_t initSize(uint32_t w, uint32_t h, PixelFormat format,
136            uint32_t usage);
137
138    void free_handle();
139
140    // Flattenable protocol
141    size_t getFlattenedSize() const;
142    size_t getFdCount() const;
143    status_t flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const;
144    status_t unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count);
145
146
147    GraphicBufferMapper& mBufferMapper;
148    ssize_t mInitCheck;
149    int mIndex;
150
151    // If we're wrapping another buffer then this reference will make sure it
152    // doesn't get freed.
153    sp<ANativeWindowBuffer> mWrappedBuffer;
154};
155
156}; // namespace android
157
158#endif // ANDROID_GRAPHIC_BUFFER_H
159