gralloc_priv.h revision 06f1fa77873867819b1a6c24ba3c9a088ec6360d 
1/*
2 * Copyright (C) 2008 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 GRALLOC_PRIV_H_
18#define GRALLOC_PRIV_H_
19
20#include <stdint.h>
21#include <limits.h>
22#include <sys/cdefs.h>
23#include <hardware/gralloc.h>
24#include <pthread.h>
25#include <errno.h>
26#include <unistd.h>
27
28#include <cutils/native_handle.h>
29
30#include <linux/fb.h>
31
32/*****************************************************************************/
33
34struct private_module_t;
35struct private_handle_t;
36
37struct private_module_t {
38    gralloc_module_t base;
39
40    struct private_handle_t* framebuffer;
41    uint32_t flags;
42    uint32_t numBuffers;
43    uint32_t bufferMask;
44    pthread_mutex_t lock;
45    buffer_handle_t currentBuffer;
46    int ionfd;
47
48    int xres;
49    int yres;
50    int line_length;
51    float xdpi;
52    float ydpi;
53    float fps;
54    void *queue;
55    pthread_mutex_t queue_lock;
56
57};
58
59/*****************************************************************************/
60
61#ifdef __cplusplus
62struct private_handle_t : public native_handle {
63#else
64struct private_handle_t {
65    struct native_handle nativeHandle;
66#endif
67
68// set if using video encoding colorspace
69#define GRALLOC_USAGE_PRIVATE_CHROMA (GRALLOC_USAGE_PRIVATE_0)
70
71    enum {
72        PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
73        PRIV_FLAGS_USES_UMP    = 0x00000002,
74        PRIV_FLAGS_USES_ION    = 0x00000020
75    };
76
77    // file-descriptors
78    int     fd;
79    int     fd1;
80    int     fd2;
81    // ints
82    int     magic;
83    int     flags;
84    int     size;
85    int     offset;
86
87    int     format;
88    int     width;
89    int     height;
90    int     stride;
91    int     vstride;
92    int     gamut;
93    int     chroma;
94
95    // FIXME: the attributes below should be out-of-line
96    void    *base;
97    void    *base1;
98    void    *base2;
99    struct ion_handle *handle;
100    struct ion_handle *handle1;
101    struct ion_handle *handle2;
102
103#ifdef __cplusplus
104    static const int sNumFds = 3;
105    static const int sNumInts = 17;
106    static const int sMagic = 0x3141592;
107
108
109    private_handle_t(int fd, int size, int flags, int w,
110		     int h, int format, int stride, int vstride) :
111        fd(fd), fd1(-1), fd2(-1), magic(sMagic), flags(flags), size(size),
112        offset(0), format(format), width(w), height(h), stride(stride),
113        vstride(vstride), gamut(0), chroma(0), base(0), handle(0), handle1(0),
114        handle2(0)
115    {
116        version = sizeof(native_handle);
117        numInts = sNumInts + 2;
118        numFds = sNumFds - 2;
119    }
120
121    private_handle_t(int fd, int fd1, int size, int flags, int w,
122		     int h, int format, int stride, int vstride) :
123        fd(fd), fd1(fd1), fd2(-1), magic(sMagic), flags(flags), size(size),
124        offset(0), format(format), width(w), height(h), stride(stride),
125        vstride(vstride), gamut(0), chroma(0), base(0), base1(0), base2(0),
126        handle(0), handle1(0), handle2(0)
127    {
128        version = sizeof(native_handle);
129        numInts = sNumInts + 1;
130        numFds = sNumFds - 1;
131    }
132
133    private_handle_t(int fd, int fd1, int fd2, int size, int flags, int w,
134		     int h, int format, int stride, int vstride) :
135        fd(fd), fd1(fd1), fd2(fd2), magic(sMagic), flags(flags), size(size),
136        offset(0), format(format), width(w), height(h), stride(stride),
137        vstride(vstride), gamut(0), chroma(0), base(0), base1(0), base2(0),
138        handle(0), handle1(0), handle2(0)
139    {
140        version = sizeof(native_handle);
141        numInts = sNumInts;
142        numFds = sNumFds;
143    }
144    ~private_handle_t() {
145        magic = 0;
146    }
147
148    static int validate(const native_handle* h) {
149        const private_handle_t* hnd = (const private_handle_t*)h;
150        if (!h || h->version != sizeof(native_handle) ||
151            hnd->numInts + hnd->numFds != sNumInts + sNumFds ||
152            hnd->magic != sMagic)
153        {
154            ALOGE("invalid gralloc handle (at %p)", reinterpret_cast<void *>(const_cast<native_handle *>(h)));
155            return -EINVAL;
156        }
157        return 0;
158    }
159
160    static private_handle_t* dynamicCast(const native_handle* in)
161    {
162        if (validate(in) == 0)
163            return (private_handle_t*) in;
164
165        return NULL;
166    }
167
168#endif
169};
170
171#endif /* GRALLOC_PRIV_H_ */
172