1/*
2 * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
3 * Copyright (C) 2010-2011 LunarG Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef _GRALLOC_DRM_HANDLE_H_
25#define _GRALLOC_DRM_HANDLE_H_
26
27#include <cutils/log.h>
28#include <cutils/native_handle.h>
29#include <system/graphics.h>
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35struct gralloc_drm_bo_t;
36
37struct gralloc_drm_handle_t {
38	native_handle_t base;
39
40	/* file descriptors */
41	int prime_fd;
42
43	/* integers */
44	int magic;
45
46	int width;
47	int height;
48	int format;
49	int usage;
50
51	int name;   /* the name of the bo */
52	int stride; /* the stride in bytes */
53
54	struct gralloc_drm_bo_t *data; /* pointer to struct gralloc_drm_bo_t */
55
56	// FIXME: the attributes below should be out-of-line
57	uint64_t unknown __attribute__((aligned(8)));
58	int data_owner; /* owner of data (for validation) */
59};
60#define GRALLOC_DRM_HANDLE_MAGIC 0x12345678
61#define GRALLOC_DRM_HANDLE_NUM_FDS 1
62#define GRALLOC_DRM_HANDLE_NUM_INTS (						\
63	((sizeof(struct gralloc_drm_handle_t) - sizeof(native_handle_t))/sizeof(int))	\
64	 - GRALLOC_DRM_HANDLE_NUM_FDS)
65
66static inline struct gralloc_drm_handle_t *gralloc_drm_handle(buffer_handle_t _handle)
67{
68	struct gralloc_drm_handle_t *handle =
69		(struct gralloc_drm_handle_t *) _handle;
70
71	if (handle && (handle->base.version != sizeof(handle->base) ||
72	               handle->base.numInts != GRALLOC_DRM_HANDLE_NUM_INTS ||
73	               handle->base.numFds != GRALLOC_DRM_HANDLE_NUM_FDS ||
74	               handle->magic != GRALLOC_DRM_HANDLE_MAGIC)) {
75		ALOGE("invalid handle: version=%d, numInts=%d, numFds=%d, magic=%x",
76			handle->base.version, handle->base.numInts,
77			handle->base.numFds, handle->magic);
78		handle = NULL;
79	}
80
81	return handle;
82}
83
84/*
85 * The functions supported by gralloc_drm's temporary private API are listed
86 * below. Use of these functions is highly discouraged and should only be
87 * reserved for cases where no alternative to get same information (such as
88 * querying ANativeWindow) exists.
89 */
90enum {
91  GRALLOC_DRM_GET_STRIDE,
92  GRALLOC_DRM_GET_FORMAT,
93  GRALLOC_DRM_GET_DIMENSIONS,
94  GRALLOC_DRM_GET_BACKING_STORE,
95};
96
97#ifdef __cplusplus
98}
99#endif
100#endif /* _GRALLOC_DRM_HANDLE_H_ */
101