1 #ifndef SCENE_H_

2 #define SCENE_H_

3

4 #include "mesh.h"

5

6 struct scenefile;

7 struct scnfile_io;

8

9 #ifdef __cplusplus

10 extern "C" {

11 #endif

12

13 int scnfile_init(struct scenefile *scn);

14 void scnfile_destroy(struct scenefile *scn);

15

16 struct scenefile *scnfile_create(void);

17 void scnfile_free(struct scenefile *scn);

18

19

20 int scnfile_add_mesh(struct scenefile *scn, struct mesh *mesh);

21

22

23 int scnfile_load(struct scenefile *scn, const char *fname);

24 int scnfile_read_file(struct scenefile *scn, FILE *fp);

25 int scnfile_read(struct scenefile *scn, struct scnfile_io *io);

26

27 int scnfile_find_mesh(struct scenefile *scn, const char *fname);

28 struct mesh *scnfile_mesh(struct scenefile *scn, int idx);

29 int scnfile_count(struct scenefile *scn);

30

31

32 /* These functions can be used to fill an scnfile_io struct before it's passed to

33 * one of the user-defined i/o image reading/writing functions (scnfile_read/scnfile_write).

34 *

35 * User-defined i/o functions:

36 *

37 * - size_t read_func(void *buffer, size_t bytes, void *user_ptr)

38 * Must try to fill the buffer with the specified number of bytes, and return

39 * the number of bytes actually read.

40 *

41 * - size_t write_func(void *buffer, size_t bytes, void *user_ptr)

42 * Must write the specified number of bytes from the supplied buffer and return

43 * the number of bytes actually written.

44 *

45 * - long seek_func(long offset, int whence, void *user_ptr)

46 * Must seek offset bytes from: the beginning of the file if whence is SEEK_SET,

47 * the current position if whence is SEEK_CUR, or the end of the file if whence is

48 * SEEK_END, and return the resulting file offset from the beginning of the file.

49 * (i.e. seek_func(0, SEEK_CUR, user_ptr); must be equivalent to an ftell).

50 *

51 * All three functions get the user-data pointer set through scnfile_io_set_user_data

52 * as their last argument.

53 *

54 * Note: obviously you don't need to set a write function if you're only going

55 * to call scnfile_read, or the read and seek function if you're only going to call

56 * scnfile_write.

57 *

58 * Note: if the user-supplied write function is buffered, make sure to flush

59 * (or close the file) after scnfile_write returns.

60 */

61 void scnfile_io_user_data(struct scnfile_io *io, void *uptr);

62 void scnfile_io_read_func(struct scnfile_io *io, size_t (*read)(void*, size_t, void*));

63 void scnfile_io_write_func(struct scnfile_io *io, size_t (*write)(void*, size_t, void*));

64 void scnfile_io_seek_func(struct scnfile_io *io, long (*seek)(long, int, void*));

65

66

67 #ifdef __cplusplus

68 }

69 #endif

70

71 #endif /* SCENE_H_ */