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#ifndef IMV_BACKEND_H
#define IMV_BACKEND_H
#include <stddef.h>
struct imv_source;
enum backend_result {
BACKEND_SUCCESS = 0, /* successful load */
BACKEND_BAD_PATH = 1, /* no such file, bad permissions, etc. */
BACKEND_UNSUPPORTED = 2, /* unsupported file format */
};
/* A backend is responsible for taking a path, or a raw data pointer, and
* converting that into a source that imv can handle. Each backend
* may be powered by a different image library and support different
* image formats.
*/
struct imv_backend {
/* Name of the backend, for debug and user informational purposes */
const char *name;
/* Information about the backend, displayed by help dialog */
const char *description;
/* Official website address */
const char *website;
/* License the backend is used under */
const char *license;
/* Input: path to open
* Output: initialises the imv_source instance passed in
*/
enum backend_result (*open_path)(const char *path, struct imv_source **src);
/* Input: pointer to data and length of data
* Output: initialises the imv_source instance passed in
*/
enum backend_result (*open_memory)(void *data, size_t len, struct imv_source **src);
};
#endif
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