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1 #ifndef SCENE_H_
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2 #define SCENE_H_
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3
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4 #include "mesh.h"
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5
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6 struct scenefile;
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7 struct scnfile_io;
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8
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9 #ifdef __cplusplus
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10 extern "C" {
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11 #endif
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12
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13 int scnfile_init(struct scenefile *scn);
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14 void scnfile_destroy(struct scenefile *scn);
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15
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16 struct scenefile *scnfile_create(void);
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17 void scnfile_free(struct scenefile *scn);
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18
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19
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20 int scnfile_add_mesh(struct scenefile *scn, struct mesh *mesh);
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21
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22
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23 int scnfile_load(struct scenefile *scn, const char *fname);
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24 int scnfile_read_file(struct scenefile *scn, FILE *fp);
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25 int scnfile_read(struct scenefile *scn, struct scnfile_io *io);
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26
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27 int scnfile_find_mesh(struct scenefile *scn, const char *fname);
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28 struct mesh *scnfile_mesh(struct scenefile *scn, int idx);
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29 int scnfile_count(struct scenefile *scn);
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30
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31
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32 /* These functions can be used to fill an scnfile_io struct before it's passed to
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33 * one of the user-defined i/o image reading/writing functions (scnfile_read/scnfile_write).
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34 *
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35 * User-defined i/o functions:
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36 *
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37 * - size_t read_func(void *buffer, size_t bytes, void *user_ptr)
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38 * Must try to fill the buffer with the specified number of bytes, and return
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39 * the number of bytes actually read.
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40 *
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41 * - size_t write_func(void *buffer, size_t bytes, void *user_ptr)
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42 * Must write the specified number of bytes from the supplied buffer and return
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43 * the number of bytes actually written.
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44 *
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45 * - long seek_func(long offset, int whence, void *user_ptr)
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46 * Must seek offset bytes from: the beginning of the file if whence is SEEK_SET,
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47 * the current position if whence is SEEK_CUR, or the end of the file if whence is
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48 * SEEK_END, and return the resulting file offset from the beginning of the file.
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49 * (i.e. seek_func(0, SEEK_CUR, user_ptr); must be equivalent to an ftell).
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50 *
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51 * All three functions get the user-data pointer set through scnfile_io_set_user_data
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52 * as their last argument.
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53 *
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54 * Note: obviously you don't need to set a write function if you're only going
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55 * to call scnfile_read, or the read and seek function if you're only going to call
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56 * scnfile_write.
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57 *
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58 * Note: if the user-supplied write function is buffered, make sure to flush
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59 * (or close the file) after scnfile_write returns.
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60 */
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61 void scnfile_io_user_data(struct scnfile_io *io, void *uptr);
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62 void scnfile_io_read_func(struct scnfile_io *io, size_t (*read)(void*, size_t, void*));
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63 void scnfile_io_write_func(struct scnfile_io *io, size_t (*write)(void*, size_t, void*));
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64 void scnfile_io_seek_func(struct scnfile_io *io, long (*seek)(long, int, void*));
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65
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66
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67 #ifdef __cplusplus
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68 }
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69 #endif
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70
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71 #endif /* SCENE_H_ */
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