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- /* rle.h - header file for Utah Raster Toolkit files */
-
- #define RLE_MAGIC 0xcc52
-
- typedef struct {
- unsigned short magic;
- unsigned short xpos, ypos;
- unsigned short xsize, ysize;
- unsigned char flags;
- unsigned char ncolors; /* no of color channels - 0 = only color map, 1 = B&W, 3 = RGB */
- unsigned char pixelbits; /* bits per pixel, per color channel (max 8) */
- unsigned char ncmap; /* no of color map channels */
- unsigned char cmaplen; /* no of entries in color map for each channel (log base 2, i.e. 8 = 256 entries) */
- } Header;
-
- /* flags */
- #define H_CLEARFIRST 0x01 /* clear frame buffer -- ignored (we always clear) */
- #define H_NO_BACKGROUND 0x02 /* no background color provided */
- #define H_ALPHA 0x04 /* has alpha channel (color channel -1, not counted in Header.ncolors) */
- #define H_COMMENT 0x08 /* comments after header */
-
- /* image encoding opcodes */
- #define OP_SKIPLINES 0x01
- #define OP_SETCOLOR 0x02
- #define OP_SKIPPIXELS 0x03
- #define OP_BYTEDATA 0x05
- #define OP_RUNDATA 0x06
- #define OP_EOF 0x07
-
- #define OP_LONG_DATUM 0x40
-
- /* SetColor datum values */
- #define CHANNEL_RED 0x00
- #define CHANNEL_GREEN 0x01
- #define CHANNEL_BLUE 0x02
- #define CHANNEL_ALPHA 0xff /* -1 */
-
-