Attachment 6087 Details for Bug 7381 – Program to draw a line

Program to draw a line

xline.c (text/plain), 1.67 KB, created by Paul Mackerras on 2006-06-30 20:14:23 UTC

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Filename:

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Creator: Paul Mackerras

Created: 2006-06-30 20:14:23 UTC

Size: 1.67 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <X11/Xlib.h>
>#include <X11/Xutil.h>
>
>char *wname = "xline";
>
>#define XDIM	300
>#define YDIM	300
>
>XPoint points[4] = {
>	{ 74, 31029},
>	{ 74, 177},
>	{ 108, 143},
>	{ 108, -384},
>};
>
>main(int ac, char **av)
>{
>	Display *disp;
>	Window wind;
>	int scr, y;
>	unsigned long fg, bg;
>	GC gc, gcc;
>	XEvent xev;
>	XSizeHints hints;
>	XWMHints whints;
>	XGCValues gcv;
>	Pixmap pix;
>
>	if (ac > 1) {
>		y = atoi(av[1]);
>		if (y != 0)
>			points[0].y = y;
>	}
>
>	disp = XOpenDisplay(NULL);
>	if( disp == NULL ){
>		fprintf(stderr, "couldn't open display\n");
>		exit(1);
>	}
>
>	scr = DefaultScreen(disp);
>	bg = WhitePixel(disp, scr);
>	fg = BlackPixel(disp, scr);
>
>	hints.width = XDIM; hints.height = YDIM;
>	hints.flags = USSize;
>	wind = XCreateSimpleWindow(disp, DefaultRootWindow(disp),
>				   0, 0, XDIM, YDIM, 0, bg, bg);
>	XSetStandardProperties(disp, wind, wname, wname, None, av, ac, &hints);
>	whints.flags = InputHint;
>	whints.input = 1;
>	XSetWMHints(disp, wind, &whints);
>
>	gcv.foreground = bg;
>	gcc = XCreateGC(disp, wind, GCForeground, &gcv);
>
>	pix = XCreatePixmap(disp, wind, XDIM, YDIM,
>			    DefaultDepth(disp, scr));
>	XFillRectangle(disp, pix, gcc, 0, 0, XDIM, YDIM);
>
>	gcv.foreground = fg;
>	gcv.line_width = 2;
>	gc = XCreateGC(disp, wind, GCForeground | GCLineWidth, &gcv);
>
>	XDrawLines(disp, pix, gc, points, 4, CoordModeOrigin);
>
>	XSelectInput(disp, wind, ExposureMask);
>	XMapRaised(disp, wind);
>
>	for (;;) {
>		XNextEvent(disp, &xev);
>		switch (xev.type) {
>		case Expose:
>			if (xev.xexpose.count == 0)
>				XCopyArea(disp, pix, wind, gcc, 0, 0,
>					  XDIM, YDIM, 0, 0);
>			break;
>		}
>	}
>
>
>	XFreeGC(disp, gc);
>	XDestroyWindow(disp, wind);
>	XCloseDisplay(disp);
>	exit(0);
>}

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Attachments on bug 7381: 6087 | 6088

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