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Skunkware 5
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X11
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xlock
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image.c
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C/C++ Source or Header
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1995-05-09
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3KB
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112 lines
#ifndef lint
static char sccsid[] = "@(#)image.c 1.7 91/05/24 XLOCK";
#endif
/*-
* image.c - image bouncer for xlock, the X Window System lockscreen.
*
* Copyright (c) 1991 by Patrick J. Naughton.
*
* See xlock.c for copying information.
*
* Revision History:
* 29-Jul-90: Written.
*/
#include "xlock.h"
#include "sunlogo.bit"
static XImage logo = {
0, 0, /* width, height */
0, XYBitmap, 0, /* xoffset, format, data */
LSBFirst, 8, /* byte-order, bitmap-unit */
LSBFirst, 8, 1 /* bitmap-bit-order, bitmap-pad, depth */
};
#define MAXICONS 256
typedef struct {
int x;
int y;
} point;
typedef struct {
int width;
int height;
int nrows;
int ncols;
int xb;
int yb;
int iconmode;
int iconcount;
point icons[MAXICONS];
long startTime;
} imagestruct;
static imagestruct ims[MAXSCREENS];
void
drawimage(win)
Window win;
{
imagestruct *ip = &ims[screen];
int i;
XSetForeground(dsp, Scr[screen].gc, BlackPixel(dsp, screen));
for (i = 0; i < ip->iconcount; i++) {
if (!ip->iconmode)
XFillRectangle(dsp, win, Scr[screen].gc,
ip->xb + sunlogo_width * ip->icons[i].x,
ip->yb + sunlogo_height * ip->icons[i].y,
sunlogo_width, sunlogo_height);
ip->icons[i].x = random() % ip->ncols;
ip->icons[i].y = random() % ip->nrows;
}
if (Scr[screen].npixels == 2)
XSetForeground(dsp, Scr[screen].gc, WhitePixel(dsp, screen));
for (i = 0; i < ip->iconcount; i++) {
if (Scr[screen].npixels > 2)
XSetForeground(dsp, Scr[screen].gc,
Scr[screen].pixels[random() % Scr[screen].npixels]);
XPutImage(dsp, win, Scr[screen].gc, &logo,
0, 0,
ip->xb + sunlogo_width * ip->icons[i].x,
ip->yb + sunlogo_height * ip->icons[i].y,
sunlogo_width, sunlogo_height);
}
}
void
initimage(win)
Window win;
{
XWindowAttributes xgwa;
imagestruct *ip = &ims[screen];
ip->startTime = seconds();
logo.data = (char *) sunlogo_bits;
logo.width = sunlogo_width;
logo.height = sunlogo_height;
logo.bytes_per_line = (sunlogo_width + 7) / 8;
XGetWindowAttributes(dsp, win, &xgwa);
ip->width = xgwa.width;
ip->height = xgwa.height;
ip->ncols = ip->width / sunlogo_width;
ip->nrows = ip->height / sunlogo_height;
ip->iconmode = (ip->ncols < 2 || ip->nrows < 2);
if (ip->iconmode) {
ip->xb = 0;
ip->yb = 0;
ip->iconcount = 1; /* icon mode */
} else {
ip->xb = (ip->width - sunlogo_width * ip->ncols) / 2;
ip->yb = (ip->height - sunlogo_height * ip->nrows) / 2;
ip->iconcount = batchcount;
}
XSetForeground(dsp, Scr[screen].gc, BlackPixel(dsp, screen));
XFillRectangle(dsp, win, Scr[screen].gc, 0, 0, ip->width, ip->height);
}