blob: 4f1a0dd9f09b25c8ff3e8b79330a62332a09f7be (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
#ifndef IMV_SOURCE_H
#define IMV_SOURCE_H
#include <pthread.h>
#include <stdbool.h>
#include "bitmap.h"
struct imv_source_message {
/* Pointer to sender of message */
struct imv_source *source;
/* User-supplied pointer */
void *user_data;
/* Receiver is responsible for destroying bitmap */
struct imv_bitmap *bitmap;
/* If an animated gif, the frame's duration in milliseconds, else 0 */
int frametime;
/* Error message if bitmap was NULL */
const char *error;
};
/* Generic source of one or more bitmaps. Essentially a single image file */
struct imv_source {
/* usually the path of the image this is the source of */
char *name;
/* source's image dimensions */
int width;
int height;
/* Usually 1, more if animated */
int num_frames;
/* Next frame to be loaded, 0-indexed */
int next_frame;
/* Attempted to be locked by load_first_frame or load_next_frame.
* If the mutex can't be locked, the call is aborted.
* Used to prevent the source from having multiple worker threads at once.
* Released by the source before calling the message callback with a result.
*/
pthread_mutex_t busy;
/* Trigger loading of the first frame. Returns 0 on success. */
int (*load_first_frame)(struct imv_source *src);
/* Trigger loading of next frame. Returns 0 on success. */
int (*load_next_frame)(struct imv_source *src);
/* Safely free contents of this source. After this returns
* it is safe to dealocate/overwrite the imv_source instance.
*/
void (*free)(struct imv_source *src);
/* User-specified callback for returning messages */
void (*callback)(struct imv_source_message *message);
/* User-specified pointer, included in returned messages */
void *user_data;
/* Implementation private data */
void *private;
};
#endif
|
