include/load_img.h

   1
   2 /* ------------------------------------------- */
   3 #define XIMG 0x58494D47
   4
   5 /* Header of GEM Image Files   */
   6 typedef struct IMG_HEADER {
   7     short version;  /* Img file format version (1) */
   8     short length;   /* Header length in words  (8) */
   9     short planes;   /* Number of bit-planes    (1) */
  10     short pat_len;  /* length of Patterns      (2) */
  11     short pix_w;    /* Pixel width in 1/1000 mmm  (372)    */
  12     short pix_h;    /* Pixel height in 1/1000 mmm (372)    */
  13     short img_w;    /* Pixels per line (=(x+7)/8 Bytes)    */
  14     short img_h;    /* Total number of lines               */
  15     long magic;     /* Contains "XIMG" if standard color   */
  16     short paltype;  /* palette type (0=RGB (short each)) */
  17     short *palette; /* palette etc.                        */
  18     char *addr;     /* Address for the depacked bit-planes */
  19 } IMG_header;
  20
  21 /* ------------------------------------------- */
  22 /* error codes */
  23 #define ERR_HEADER 1
  24 #define ERR_ALLOC 2
  25 #define ERR_FILE 3
  26 #define ERR_DEPACK 4
  27 #define ERR_COLOR 5
  28
  29 /* saves the current colorpalette with col colors in palette */
  30 void get_colors(int handle, short *palette, int col);
  31
  32 /* sets col colors from palette */
  33 void img_set_colors(int handle, short *palette, int col);
  34
  35 /* converts MFDB  of size from standard to deviceformat (0 if succeded, else
  36  * error). */
  37 int convert(MFDB *, long);
  38
  39 /* transforms image in VDI-Device format */
  40 int transform_img(MFDB *);
  41
  42 /* Loads & depacks IMG (0 if succeded, else error). */
  43 /* Bitplanes are one after another in address IMG_HEADER.addr. */
  44 int depack_img(char *, IMG_header *);
  45
  46 /* Halves IMG in Device-format, dest memory has to be allocated*/
  47 int half_img(MFDB *, MFDB *);