diff options
Diffstat (limited to 'tiff/tools/rasterfile.h')
| -rw-r--r-- | tiff/tools/rasterfile.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tiff/tools/rasterfile.h b/tiff/tools/rasterfile.h new file mode 100644 index 0000000..7f214a5 --- /dev/null +++ b/tiff/tools/rasterfile.h @@ -0,0 +1,49 @@ +/* $Header: /cvs/maptools/cvsroot/libtiff/tools/rasterfile.h,v 1.3.2.1 2010-06-08 18:50:44 bfriesen Exp $ */ + +/* + * Description of header for files containing raster images + */ +struct rasterfile { + char ras_magic[4]; /* magic number */ + long ras_width; /* width (pixels) of image */ + long ras_height; /* height (pixels) of image */ + long ras_depth; /* depth (1, 8, or 24 bits) of pixel */ + long ras_length; /* length (bytes) of image */ + long ras_type; /* type of file; see RT_* below */ + long ras_maptype; /* type of colormap; see RMT_* below */ + long ras_maplength; /* length (bytes) of following map */ + /* color map follows for ras_maplength bytes, followed by image */ +}; +#define RAS_MAGIC "\x59\xa6\x6a\x95" +#define RAS_MAGIC_INV "\x95\x6a\xa6\x59" + + /* Sun supported ras_type's */ +#define RT_OLD 0 /* Raw pixrect image in 68000 byte order */ +#define RT_STANDARD 1 /* Raw pixrect image in 68000 byte order */ +#define RT_BYTE_ENCODED 2 /* Run-length compression of bytes */ +#define RT_EXPERIMENTAL 0xffff /* Reserved for testing */ + + /* Sun registered ras_maptype's */ +#define RMT_RAW 2 + /* Sun supported ras_maptype's */ +#define RMT_NONE 0 /* ras_maplength is expected to be 0 */ +#define RMT_EQUAL_RGB 1 /* red[ras_maplength/3],green[],blue[] */ + +/* + * NOTES: + * Each line of the image is rounded out to a multiple of 16 bits. + * This corresponds to the rounding convention used by the memory pixrect + * package (/usr/include/pixrect/memvar.h) of the SunWindows system. + * The ras_encoding field (always set to 0 by Sun's supported software) + * was renamed to ras_length in release 2.0. As a result, rasterfiles + * of type 0 generated by the old software claim to have 0 length; for + * compatibility, code reading rasterfiles must be prepared to compute the + * true length from the width, height, and depth fields. + */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |