libvo/bitmap_packer.h

   1 #ifndef MPLAYER_PACK_RECTANGLES_H
   2 #define MPLAYER_PACK_RECTANGLES_H
   3
   4 struct pos {
   5     int x;
   6     int y;
   7 };
   8
   9 struct bitmap_packer {
  10     int w;
  11     int h;
  12     int w_max;
  13     int h_max;
  14     int padding;
  15     int count;
  16     struct pos *in;
  17     struct pos *result;
  18     int used_width;
  19     int used_height;
  20
  21     // internal
  22     int *scratch;
  23     int asize;
  24 };
  25
  26 struct ass_image;
  27 struct sub_bitmaps;
  28
  29 /* Reallocate packer->in for at least to desired number of items.
  30  * Also sets packer->count to the same value.
  31  */
  32 void packer_set_size(struct bitmap_packer *packer, int size);
  33
  34 /* To use this, set packer->count to number of rectangles, w_max and h_max
  35  * to maximum output rectangle size, and w and h to start size (may be 0).
  36  * Write input sizes in packer->in.
  37  * Resulting packing will be written in packer->result.
  38  * w and h will be increased if necessary for successful packing.
  39  * Return value is -1 if packing failed because w and h were set to max
  40  * values but that wasn't enough, 1 if w or h was increased, and 0 otherwise.
  41  */
  42 int packer_pack(struct bitmap_packer *packer);
  43
  44 /* Like above, but packer->count will be automatically set and
  45  * packer->in will be reallocated if needed and filled from the
  46  * given image list.
  47  */
  48 int packer_pack_from_subbitmaps(struct bitmap_packer *packer,
  49                                 struct sub_bitmaps *b, int padding_pixels);
  50
  51 #endif