filter/image-sgi.h

   1 /*
   2  * "$Id: image-sgi.h 6649 2007-07-11 21:46:42Z mike $"
   3  *
   4  *   SGI image file format library definitions for CUPS.
   5  *
   6  *   Copyright 2007-2011 by Apple Inc.
   7  *   Copyright 1993-2005 by Easy Software Products.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Apple Inc. and are protected by Federal copyright
  11  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  *   which should have been included with this file.  If this file is
  13  *   file is missing or damaged, see the license at "http://www.cups.org/".
  14  *
  15  *   This file is subject to the Apple OS-Developed Software exception.
  16  */
  17
  18 #ifndef _SGI_H_
  19 #  define _SGI_H_
  20
  21 #  include <stdio.h>
  22 #  include <stdlib.h>
  23 #  include <string.h>
  24
  25 #  ifdef __cplusplus
  26 extern "C" {
  27 #  endif
  28
  29
  30 /*
  31  * Constants...
  32  */
  33
  34 #  define SGI_MAGIC     474     /* Magic number in image file */
  35
  36 #  define SGI_READ      0       /* Read from an SGI image file */
  37 #  define SGI_WRITE     1       /* Write to an SGI image file */
  38
  39 #  define SGI_COMP_NONE 0       /* No compression */
  40 #  define SGI_COMP_RLE  1       /* Run-length encoding */
  41 #  define SGI_COMP_ARLE 2       /* Agressive run-length encoding */
  42
  43
  44 /*
  45  * Image structure...
  46  */
  47
  48 typedef struct
  49 {
  50   FILE                  *file;          /* Image file */
  51   int                   mode,           /* File open mode */
  52                         bpp,            /* Bytes per pixel/channel */
  53                         comp;           /* Compression */
  54   unsigned short        xsize,          /* Width in pixels */
  55                         ysize,          /* Height in pixels */
  56                         zsize;          /* Number of channels */
  57   long                  firstrow,       /* File offset for first row */
  58                         nextrow,        /* File offset for next row */
  59                         **table,        /* Offset table for compression */
  60                         **length;       /* Length table for compression */
  61   unsigned short        *arle_row;      /* Advanced RLE compression buffer */
  62   long                  arle_offset,    /* Advanced RLE buffer offset */
  63                         arle_length;    /* Advanced RLE buffer length */
  64 } sgi_t;
  65
  66
  67 /*
  68  * Prototypes...
  69  */
  70
  71 extern int      sgiClose(sgi_t *sgip);
  72 extern int      sgiGetRow(sgi_t *sgip, unsigned short *row, int y, int z);
  73 extern sgi_t    *sgiOpen(const char *filename, int mode, int comp, int bpp,
  74                          int xsize, int ysize, int zsize);
  75 extern sgi_t    *sgiOpenFile(FILE *file, int mode, int comp, int bpp,
  76                              int xsize, int ysize, int zsize);
  77 extern int      sgiPutRow(sgi_t *sgip, unsigned short *row, int y, int z);
  78
  79 #  ifdef __cplusplus
  80 }
  81 #  endif
  82 #endif /* !_SGI_H_ */
  83
  84 /*
  85  * End of "$Id: image-sgi.h 6649 2007-07-11 21:46:42Z mike $".
  86  */