projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 8414a40c VZ |
1 | /* $Header: /cvs/maptools/cvsroot/libtiff/tools/rasterfile.h,v 1.3 2003/11/12 19:14:33 dron Exp $ */ |
| 2 | ||
| 3 | /* | |
| 4 | * Description of header for files containing raster images | |
| 5 | */ | |
| 6 | struct rasterfile { | |
| 7 | char ras_magic[4]; /* magic number */ | |
| 8 | long ras_width; /* width (pixels) of image */ | |
| 9 | long ras_height; /* height (pixels) of image */ | |
| 10 | long ras_depth; /* depth (1, 8, or 24 bits) of pixel */ | |
| 11 | long ras_length; /* length (bytes) of image */ | |
| 12 | long ras_type; /* type of file; see RT_* below */ | |
| 13 | long ras_maptype; /* type of colormap; see RMT_* below */ | |
| 14 | long ras_maplength; /* length (bytes) of following map */ | |
| 15 | /* color map follows for ras_maplength bytes, followed by image */ | |
| 16 | }; | |
| 17 | #define RAS_MAGIC "\x59\xa6\x6a\x95" | |
| 18 | #define RAS_MAGIC_INV "\x95\x6a\xa6\x59" | |
| 19 | ||
| 20 | /* Sun supported ras_type's */ | |
| 21 | #define RT_OLD 0 /* Raw pixrect image in 68000 byte order */ | |
| 22 | #define RT_STANDARD 1 /* Raw pixrect image in 68000 byte order */ | |
| 23 | #define RT_BYTE_ENCODED 2 /* Run-length compression of bytes */ | |
| 24 | #define RT_EXPERIMENTAL 0xffff /* Reserved for testing */ | |
| 25 | ||
| 26 | /* Sun registered ras_maptype's */ | |
| 27 | #define RMT_RAW 2 | |
| 28 | /* Sun supported ras_maptype's */ | |
| 29 | #define RMT_NONE 0 /* ras_maplength is expected to be 0 */ | |
| 30 | #define RMT_EQUAL_RGB 1 /* red[ras_maplength/3],green[],blue[] */ | |
| 31 | ||
| 32 | /* | |
| 33 | * NOTES: | |
| 34 | * Each line of the image is rounded out to a multiple of 16 bits. | |
| 35 | * This corresponds to the rounding convention used by the memory pixrect | |
| 36 | * package (/usr/include/pixrect/memvar.h) of the SunWindows system. | |
| 37 | * The ras_encoding field (always set to 0 by Sun's supported software) | |
| 38 | * was renamed to ras_length in release 2.0. As a result, rasterfiles | |
| 39 | * of type 0 generated by the old software claim to have 0 length; for | |
| 40 | * compatibility, code reading rasterfiles must be prepared to compute the | |
| 41 | * true length from the width, height, and depth fields. | |
| 42 | */ |