images/duplicates.h

   1 #ifndef _IMAGES_DUPLICATES_H
   2 #define _IMAGES_DUPLICATES_H
   3
   4 enum image_dup_flags {
   5   IMAGE_DUP_TRANS_ID =          0x0001,
   6   IMAGE_DUP_FLIP_X =            0x0002,
   7   IMAGE_DUP_FLIP_Y =            0x0004,
   8   IMAGE_DUP_ROT_180 =           0x0008,
   9   IMAGE_DUP_FLIP_BACK =         0x0010,
  10   IMAGE_DUP_ROT_CCW =           0x0020,
  11   IMAGE_DUP_ROT_CW =            0x0040,
  12   IMAGE_DUP_FLIP_SLASH =        0x0080,
  13   IMAGE_DUP_TRANS_ALL =         0x00ff,
  14   IMAGE_DUP_SCALE =             0x0100,
  15   IMAGE_DUP_WANT_ALL =          0x0200,
  16 };
  17
  18 struct image_dup_context {
  19   struct image_context *ic;
  20   uns flags;
  21   uns ratio_threshold;
  22   uns error_threshold;
  23 };
  24
  25 struct image_dup {
  26   struct image image;
  27   byte *tab_pixels;
  28   u32 tab_cols;
  29   u32 tab_rows;
  30   u32 tab_row_size;
  31   u32 tab_size;
  32 };
  33
  34 /* dup-init.c */
  35
  36 void image_dup_context_init(struct image_context *ic, struct image_dup_context *ctx);
  37 void image_dup_context_cleanup(struct image_dup_context *ctx);
  38 uns image_dup_estimate_size(uns cols, uns rows);
  39 uns image_dup_new(struct image_context *ctx, struct image *image, void *buffer);
  40
  41 /* dup-cmp.c */
  42
  43 uns image_dup_compare(struct image_dup_context *ctx, struct image_dup *dup1, struct image_dup *dup2);
  44
  45 /* internals */
  46
  47 static inline byte *
  48 image_dup_block(struct image_dup *dup, uns tab_col, uns tab_row)
  49 {
  50   return dup->tab_pixels + (dup->tab_row_size << tab_row) + (3 << (tab_row + tab_col));
  51 }
  52
  53
  54 #endif