src/tiff/contrib/pds/tif_imageiter.h

   1 typedef struct _TIFFImageIter TIFFImageIter;
   2
   3 /* The callback function is called for each "block" of image pixel data after
   4    it has been read from the file and decoded. This image pixel data is in the
   5    buffer pp, and this data represents the image pixels from (x,y) to
   6    (x+w,y+h). It is stored in pixel format, so each pixel contains
   7    img->samplesperpixel consecutive samples each containing img->bitspersample
   8    bits of data. The array pp is ordered in h consecutive rows of w+fromskew
   9    pixels each. */
  10 typedef void (*ImageIterTileContigRoutine)
  11     (TIFFImageIter*, void *, uint32, uint32, uint32, uint32, int32,
  12         unsigned char*);
  13 #define DECLAREContigCallbackFunc(name) \
  14 static void name(\
  15     TIFFImageIter* img, \
  16     void* user_data, \
  17     uint32 x, uint32 y, \
  18     uint32 w, uint32 h, \
  19     int32 fromskew, \
  20     u_char* pp \
  21 )
  22
  23 typedef void (*ImageIterTileSeparateRoutine)
  24     (TIFFImageIter*, void *, uint32, uint32, uint32, uint32, int32,
  25         unsigned char*, unsigned char*, unsigned char*, unsigned char*);
  26 #define DECLARESepCallbackFunc(name) \
  27 static void name(\
  28     TIFFImageIter* img, \
  29     void* user_data, \
  30     uint32 x, uint32 y, \
  31     uint32 w, uint32 h,\
  32     int32 fromskew, \
  33     u_char* r, u_char* g, u_char* b, u_char* a\
  34 )
  35
  36 struct _TIFFImageIter {
  37         TIFF*   tif;                            /* image handle */
  38         int     stoponerr;                      /* stop on read error */
  39         int     isContig;                       /* data is packed/separate */
  40         int     alpha;                          /* type of alpha data present */
  41         uint32  width;                          /* image width */
  42         uint32  height;                         /* image height */
  43         uint16  bitspersample;                  /* image bits/sample */
  44         uint16  samplesperpixel;                /* image samples/pixel */
  45         uint16  orientation;                    /* image orientation */
  46         uint16  photometric;                    /* image photometric interp */
  47         uint16* redcmap;                        /* colormap pallete */
  48         uint16* greencmap;
  49         uint16* bluecmap;
  50                                                 /* get image data routine */
  51         int     (*get)(TIFFImageIter*, void *udata, uint32, uint32);
  52         union {
  53             void (*any)(TIFFImageIter*);
  54             ImageIterTileContigRoutine          contig;
  55             ImageIterTileSeparateRoutine        separate;
  56         } callback;                             /* fn to exec for each block */
  57 };