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 the Common UNIX Printing
   5  *   System (CUPS).
   6  *
   7  *   Copyright 2007 by Apple Inc.
   8  *   Copyright 1993-2005 by Easy Software Products.
   9  *
  10  *   These coded instructions, statements, and computer programs are the
  11  *   property of Apple Inc. and are protected by Federal copyright
  12  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  13  *   which should have been included with this file.  If this file is
  14  *   file is missing or damaged, see the license at "http://www.cups.org/".
  15  *
  16  *   This file is subject to the Apple OS-Developed Software exception.
  17  */
  18
  19 #ifndef _SGI_H_
  20 #  define _SGI_H_
  21
  22 #  include <stdio.h>
  23 #  include <stdlib.h>
  24 #  include <string.h>
  25
  26 #  ifdef __cplusplus
  27 extern "C" {
  28 #  endif
  29
  30
  31 /*
  32  * Constants...
  33  */
  34
  35 #  define SGI_MAGIC     474     /* Magic number in image file */
  36
  37 #  define SGI_READ      0       /* Read from an SGI image file */
  38 #  define SGI_WRITE     1       /* Write to an SGI image file */
  39
  40 #  define SGI_COMP_NONE 0       /* No compression */
  41 #  define SGI_COMP_RLE  1       /* Run-length encoding */
  42 #  define SGI_COMP_ARLE 2       /* Agressive run-length encoding */
  43
  44
  45 /*
  46  * Image structure...
  47  */
  48
  49 typedef struct
  50 {
  51   FILE                  *file;          /* Image file */
  52   int                   mode,           /* File open mode */
  53                         bpp,            /* Bytes per pixel/channel */
  54                         comp;           /* Compression */
  55   unsigned short        xsize,          /* Width in pixels */
  56                         ysize,          /* Height in pixels */
  57                         zsize;          /* Number of channels */
  58   long                  firstrow,       /* File offset for first row */
  59                         nextrow,        /* File offset for next row */
  60                         **table,        /* Offset table for compression */
  61                         **length;       /* Length table for compression */
  62   unsigned short        *arle_row;      /* Advanced RLE compression buffer */
  63   long                  arle_offset,    /* Advanced RLE buffer offset */
  64                         arle_length;    /* Advanced RLE buffer length */
  65 } sgi_t;
  66
  67
  68 /*
  69  * Prototypes...
  70  */
  71
  72 extern int      sgiClose(sgi_t *sgip);
  73 extern int      sgiGetRow(sgi_t *sgip, unsigned short *row, int y, int z);
  74 extern sgi_t    *sgiOpen(const char *filename, int mode, int comp, int bpp,
  75                          int xsize, int ysize, int zsize);
  76 extern sgi_t    *sgiOpenFile(FILE *file, int mode, int comp, int bpp,
  77                              int xsize, int ysize, int zsize);
  78 extern int      sgiPutRow(sgi_t *sgip, unsigned short *row, int y, int z);
  79
  80 #  ifdef __cplusplus
  81 }
  82 #  endif
  83 #endif /* !_SGI_H_ */
  84
  85 /*
  86  * End of "$Id: image-sgi.h 6649 2007-07-11 21:46:42Z mike $".
  87  */