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Edit File: XWDFile.h

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/*
 * XWDFile.h	MIT Project Athena, X Window system window raster
 *		image dumper, dump file format header file.
 *
 *  Author:	Tony Della Fera, DEC
 *		27-Jun-85
 *
 * Modifier:    William F. Wyatt, SAO
 *              18-Nov-86  - version 6 for saving/restoring color maps
 */

#ifndef XWDFILE_H
#define XWDFILE_H

#include <X11/Xmd.h>

#define XWD_FILE_VERSION 7
#define sz_XWDheader 100
#define sz_XWDColor 12

typedef CARD32 xwdval;		/* for old broken programs */

/* Values in the file are most significant byte first. */

typedef struct _xwd_file_header {
	/* header_size = SIZEOF(XWDheader) + length of null-terminated
	 * window name. */
	CARD32 header_size;

CARD32 file_version;		/* = XWD_FILE_VERSION above */
	CARD32 pixmap_format;		/* ZPixmap or XYPixmap */
	CARD32 pixmap_depth;		/* Pixmap depth */
	CARD32 pixmap_width;		/* Pixmap width */
	CARD32 pixmap_height;		/* Pixmap height */
	CARD32 xoffset;			/* Bitmap x offset, normally 0 */
	CARD32 byte_order;		/* of image data: MSBFirst, LSBFirst */

/* bitmap_unit applies to bitmaps (depth 1 format XY) only.
	 * It is the number of bits that each scanline is padded to. */
	CARD32 bitmap_unit;

CARD32 bitmap_bit_order;	/* bitmaps only: MSBFirst, LSBFirst */

/* bitmap_pad applies to pixmaps (non-bitmaps) only.
	 * It is the number of bits that each scanline is padded to. */
	CARD32 bitmap_pad;

CARD32 bits_per_pixel;		/* Bits per pixel */

/* bytes_per_line is pixmap_width padded to bitmap_unit (bitmaps)
	 * or bitmap_pad (pixmaps).  It is the delta (in bytes) to get
	 * to the same x position on an adjacent row. */
	CARD32 bytes_per_line;
	CARD32 visual_class;		/* Class of colormap */
	CARD32 red_mask;		/* Z red mask */
	CARD32 green_mask;		/* Z green mask */
	CARD32 blue_mask;		/* Z blue mask */
	CARD32 bits_per_rgb;		/* Log2 of distinct color values */
	CARD32 colormap_entries;	/* Number of entries in colormap; not used? */
	CARD32 ncolors;			/* Number of XWDColor structures */
	CARD32 window_width;		/* Window width */
	CARD32 window_height;		/* Window height */
	CARD32 window_x;		/* Window upper left X coordinate */
	CARD32 window_y;		/* Window upper left Y coordinate */
	CARD32 window_bdrwidth;		/* Window border width */
} XWDFileHeader;

/* Null-terminated window name follows the above structure. */

/* Next comes XWDColor structures, at offset XWDFileHeader.header_size in
 * the file.  XWDFileHeader.ncolors tells how many XWDColor structures
 * there are.
 */

typedef struct {
        CARD32	pixel;
        CARD16	red;
        CARD16	green;
        CARD16	blue;
        CARD8	flags;
        CARD8	pad;
} XWDColor;

/* Last comes the image data in the format described by XWDFileHeader. */

#endif /* XWDFILE_H */