xenocara/app/xlockmore/xlock/xlockimage.c

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2006-11-26 04:07:42 -07:00
#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)xlockimage.c 4.19 00/10/26 xlockmore";
#endif
/*-
* Utilities for Sun rasterfile processing
*
* Copyright (c) 1995 by Tobias Gloth
*
* See xlock.c for copying information.
*
* Revision History:
* 3-Mar-96: Added random image selection.
* 12-Dec-95: Modified to be a used in more than one mode
* <joukj@hrem.stm.tudelft.nl>
* 22-May-95: Written.
*/
#include "xlock.h"
#include "xlockimage.h"
#include <time.h>
void
convert_colors(ModeInfo * mi)
{
int i;
unsigned long black, white, fgpix, bgpix;
XColor fgcol, bgcol;
black = MI_BLACK_PIXEL(mi);
white = MI_WHITE_PIXEL(mi);
fgpix = MI_FG_PIXEL(mi);
bgpix = MI_BG_PIXEL(mi);
fgcol.pixel = fgpix;
bgcol.pixel = bgpix;
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &fgcol);
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &bgcol);
/* Set these, if raster does not overwrite some, so much the better. */
if (fgpix < COLORMAP_SIZE) {
xlockimage.red[fgpix] = fgcol.red >> 8;
xlockimage.green[fgpix] = fgcol.green >> 8;
xlockimage.blue[fgpix] = fgcol.blue >> 8;
}
if (bgpix < COLORMAP_SIZE) {
xlockimage.red[bgpix] = bgcol.red >> 8;
xlockimage.green[bgpix] = bgcol.green >> 8;
xlockimage.blue[bgpix] = bgcol.blue >> 8;
}
if (white < COLORMAP_SIZE) {
xlockimage.red[white] = 0xFF;
xlockimage.green[white] = 0xFF;
xlockimage.blue[white] = 0xFF;
}
if (black < COLORMAP_SIZE) {
xlockimage.red[black] = 0;
xlockimage.green[black] = 0;
xlockimage.blue[black] = 0;
}
/* Set up raster colors */
/* Could try juggling this stuff around so it does not conflict
with fg,bg,white,black */
for (i = 0; i < (int) xlockimage.colors; i++) {
xlockimage.red[i] = xlockimage.color[i + 0 * xlockimage.colors];
xlockimage.green[i] = xlockimage.color[i + 1 * xlockimage.colors];
xlockimage.blue[i] = xlockimage.color[i + 2 * xlockimage.colors];
}
/* Make sure there is a black ... */
if (xlockimage.colors <= 0xff)
xlockimage.red[0xff] = xlockimage.green[0xff] = xlockimage.blue[0xff] = 0;
}
unsigned long
find_nearest(int r, int g, int b)
{
unsigned long i, minimum = RGBCOLORMAP_SIZE, imin = 0, t;
for (i = 0; i < COLORMAP_SIZE; i++) {
t = abs(r - (int) xlockimage.red[i]) + abs(g - (int) xlockimage.green[i]) +
abs(b - (int) xlockimage.blue[i]);
if (t < minimum) {
minimum = t;
imin = i;
}
}
#ifdef DEBUG
(void) fprintf(stderr, "giving (%d/%d/%d)[%ld] for (%d/%d/%d) diff %ld\n",
xlockimage.red[imin], xlockimage.green[imin], xlockimage.blue[imin], imin, r, g, b, minimum);
#endif
return imin;
}
#if 0
unsigned long
GetBlack(void)
{
return xlockimage.entry[find_nearest(0, 0, 0)];
}
unsigned long
GetWhite(void)
{
return xlockimage.entry[find_nearest(0xff, 0xff, 0xff)];
}
#endif
unsigned long
GetColor(ModeInfo * mi, unsigned long pixel)
{
XColor col;
col.pixel = pixel;
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &col);
return xlockimage.entry[find_nearest(col.red >> 8, col.green >> 8, col.blue >> 8)];
}
void
SetImageColors(Display * display, Colormap cmap)
{
XColor xcolor[COLORMAP_SIZE];
int i;
for (i = 0; i < COLORMAP_SIZE; i++) {
xcolor[i].flags = DoRed | DoGreen | DoBlue;
xcolor[i].red = xlockimage.red[i] << 8;
xcolor[i].green = xlockimage.green[i] << 8;
xcolor[i].blue = xlockimage.blue[i] << 8;
if (!XAllocColor(display, cmap, xcolor + i))
error("not enough colors.\n");
xlockimage.entry[i] = (int) xcolor[i].pixel;
}
/* for (i = 0; i < xlockimage.width * xlockimage.height; i++) xlockimage.data[i] =
xlockimage.entry[xlockimage.data[i]]; */
}