filter/image-sgi.h

   1 /*
   2  * "$Id$"
   3  *
   4  *   SGI image file format library definitions for the Common UNIX Printing
   5  *   System (CUPS).
   6  *
   7  *   Copyright 1993-2005 by Easy Software Products.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Easy Software Products and are protected by Federal
  11  *   copyright law.  Distribution and use rights are outlined in the file
  12  *   "LICENSE.txt" which should have been included with this file.  If this
  13  *   file is missing or damaged please contact Easy Software Products
  14  *   at:
  15  *
  16  *       Attn: CUPS Licensing Information
  17  *       Easy Software Products
  18  *       44141 Airport View Drive, Suite 204
  19  *       Hollywood, Maryland 20636 USA
  20  *
  21  *       Voice: (301) 373-9600
  22  *       EMail: cups-info@cups.org
  23  *         WWW: http://www.cups.org
  24  *
  25  *   This file is subject to the Apple OS-Developed Software exception.
  26  */
  27
  28 #ifndef _SGI_H_
  29 #  define _SGI_H_
  30
  31 #  include <stdio.h>
  32 #  include <stdlib.h>
  33 #  include <string.h>
  34
  35 #  ifdef __cplusplus
  36 extern "C" {
  37 #  endif
  38
  39
  40 /*
  41  * Constants...
  42  */
  43
  44 #  define SGI_MAGIC     474     /* Magic number in image file */
  45
  46 #  define SGI_READ      0       /* Read from an SGI image file */
  47 #  define SGI_WRITE     1       /* Write to an SGI image file */
  48
  49 #  define SGI_COMP_NONE 0       /* No compression */
  50 #  define SGI_COMP_RLE  1       /* Run-length encoding */
  51 #  define SGI_COMP_ARLE 2       /* Agressive run-length encoding */
  52
  53
  54 /*
  55  * Image structure...
  56  */
  57
  58 typedef struct
  59 {
  60   FILE                  *file;          /* Image file */
  61   int                   mode,           /* File open mode */
  62                         bpp,            /* Bytes per pixel/channel */
  63                         comp;           /* Compression */
  64   unsigned short        xsize,          /* Width in pixels */
  65                         ysize,          /* Height in pixels */
  66                         zsize;          /* Number of channels */
  67   long                  firstrow,       /* File offset for first row */
  68                         nextrow,        /* File offset for next row */
  69                         **table,        /* Offset table for compression */
  70                         **length;       /* Length table for compression */
  71   unsigned short        *arle_row;      /* Advanced RLE compression buffer */
  72   long                  arle_offset,    /* Advanced RLE buffer offset */
  73                         arle_length;    /* Advanced RLE buffer length */
  74 } sgi_t;
  75
  76
  77 /*
  78  * Prototypes...
  79  */
  80
  81 extern int      sgiClose(sgi_t *sgip);
  82 extern int      sgiGetRow(sgi_t *sgip, unsigned short *row, int y, int z);
  83 extern sgi_t    *sgiOpen(const char *filename, int mode, int comp, int bpp,
  84                          int xsize, int ysize, int zsize);
  85 extern sgi_t    *sgiOpenFile(FILE *file, int mode, int comp, int bpp,
  86                              int xsize, int ysize, int zsize);
  87 extern int      sgiPutRow(sgi_t *sgip, unsigned short *row, int y, int z);
  88
  89 #  ifdef __cplusplus
  90 }
  91 #  endif
  92 #endif /* !_SGI_H_ */
  93
  94 /*
  95  * End of "$Id$".
  96  */