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#ifndef IMV_SOURCE_H
#define IMV_SOURCE_H
/* While imv_image represents a single frame of an image, be it a bitmap or
* vector image, imv_source represents an open handle to an image file, which
* can emit one or more imv_images.
*/
struct imv_source;
struct imv_source_message;
struct imv_image;
/* Clean up a source. Blocks if the source is active in the background. Async
* version does not block, performing cleanup in another thread */
void imv_source_async_free(struct imv_source *src);
void imv_source_free(struct imv_source *src);
/* Load the first frame. Silently aborts if source is already loading. Async
* version performs loading in background. */
void imv_source_async_load_first_frame(struct imv_source *src);
void imv_source_load_first_frame(struct imv_source *src);
/* Load the next frame. Silently aborts if source is already loading. Async
* version performs loading in background. */
void imv_source_async_load_next_frame(struct imv_source *src);
void imv_source_load_next_frame(struct imv_source *src);
typedef void (*imv_source_callback)(struct imv_source_message *message);
/* Sets the callback function to be called when frame loading completes */
void imv_source_set_callback(struct imv_source *src, imv_source_callback callback, void *data);
struct imv_source_message {
/* Pointer to sender of message */
struct imv_source *source;
/* User-supplied pointer */
void *user_data;
/* Receiver is responsible for destroying image */
struct imv_image *image;
/* If an animated gif, the frame's duration in milliseconds, else 0 */
int frametime;
};
#endif
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