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/* Copyright 1990 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* x11raster.c - routines to handle images for X windows.
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*
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* 2/18/88
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*/
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "x11raster.h"
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XRASTER *
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make_raster(disp, scrn, depth, data, width, height, bm_pad)
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Display *disp;
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int scrn;
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int depth;
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char *data;
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int width, height;
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int bm_pad;
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{
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register XRASTER *xr;
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XVisualInfo ourvinfo;
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/* Pick appropriate Visual */
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if (depth == 1) {
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ourvinfo.visual = DefaultVisual(disp,scrn);
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} else if (depth == 8) {
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if (!XMatchVisualInfo(disp,scrn,8,PseudoColor,&ourvinfo))
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return(NULL);
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} else if (depth > 12) {
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if (!XMatchVisualInfo(disp,scrn,24,TrueColor,&ourvinfo))
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return(NULL);
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} else
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return(NULL);
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if ((xr = (XRASTER *)calloc(1, sizeof(XRASTER))) == NULL)
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return(NULL);
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xr->disp = disp;
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xr->screen = scrn;
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xr->visual = ourvinfo.visual;
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xr->image = XCreateImage(disp,ourvinfo.visual,depth,
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ZPixmap,0,data,width,height,bm_pad,0);
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xr->gc = XCreateGC(disp, RootWindow(disp,scrn), 0, 0);
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XSetState(disp, xr->gc, BlackPixel(disp,scrn), WhitePixel(disp,scrn),
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GXcopy, ~0L);
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return(xr);
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}
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int
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init_rcolors(xr, rmap, gmap, bmap) /* initialize colors */
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register XRASTER *xr;
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unsigned char rmap[256], gmap[256], bmap[256];
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{
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register unsigned char *p;
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register int i;
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if (xr->image->depth != 8 || xr->ncolors != 0)
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return(xr->ncolors);
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xr->pmap = (short *)malloc(256*sizeof(short));
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if (xr->pmap == NULL)
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return(0);
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xr->cdefs = (XColor *)malloc(256*sizeof(XColor));
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if (xr->cdefs == NULL)
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return(0);
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for (i = 0; i < 256; i++)
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xr->pmap[i] = -1;
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for (p = (unsigned char *)xr->image->data,
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i = xr->image->width*xr->image->height;
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i--; p++)
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if (xr->pmap[*p] == -1) {
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xr->cdefs[xr->ncolors].red = rmap[*p] << 8;
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xr->cdefs[xr->ncolors].green = gmap[*p] << 8;
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xr->cdefs[xr->ncolors].blue = bmap[*p] << 8;
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xr->cdefs[xr->ncolors].pixel = *p;
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xr->cdefs[xr->ncolors].flags = DoRed|DoGreen|DoBlue;
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xr->pmap[*p] = xr->ncolors++;
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}
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xr->cdefs = (XColor *)realloc((char *)xr->cdefs,
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xr->ncolors*sizeof(XColor));
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if (xr->cdefs == NULL)
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return(0);
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return(xr->ncolors);
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}
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unsigned long *
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map_rcolors(xr, w) /* get and assign pixels */
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register XRASTER *xr;
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Window w;
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{
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register int i;
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register unsigned char *p;
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int j;
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if (xr->ncolors == 0 || xr->image->depth != 8)
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return(NULL);
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if (xr->pixels != NULL)
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return(xr->pixels);
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xr->pixels = (unsigned long *)malloc(xr->ncolors*sizeof(unsigned long));
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if (xr->pixels == NULL)
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return(NULL);
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if (xr->visual == DefaultVisual(xr->disp, xr->screen)) {
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xr->cmap = DefaultColormap(xr->disp, xr->screen);
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goto gotmap;
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}
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getmap:
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xr->cmap = XCreateColormap(xr->disp, w, xr->visual, AllocNone);
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gotmap:
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if (XAllocColorCells(xr->disp, xr->cmap, 0,
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&j, 0, xr->pixels, xr->ncolors) == 0) {
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if (xr->cmap == DefaultColormap(xr->disp, xr->screen))
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goto getmap;
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free((char *)xr->pixels);
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xr->pixels = NULL;
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return(NULL);
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}
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for (i = 0; i < xr->ncolors; i++)
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if (xr->pmap[xr->pixels[i]] == -1)
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break;
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if (i < xr->ncolors) { /* different pixels */
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for (p = (unsigned char *)xr->image->data,
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i = xr->image->width*xr->image->height;
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i--; p++)
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*p = xr->pixels[xr->pmap[*p]];
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for (i = 0; i < 256; i++)
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xr->pmap[i] = -1;
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for (i = 0; i < xr->ncolors; i++) {
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xr->cdefs[i].pixel = xr->pixels[i];
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xr->pmap[xr->pixels[i]] = i;
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}
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free_rpixmap(xr); /* Pixmap invalid */
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}
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XStoreColors(xr->disp, xr->cmap, xr->cdefs, xr->ncolors);
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XSetWindowColormap(xr->disp, w, xr->cmap);
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return(xr->pixels);
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}
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Pixmap
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make_rpixmap(xr) /* make pixmap for raster */
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register XRASTER *xr;
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{
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Pixmap pm;
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if (xr->pm != 0)
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return(xr->pm);
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pm = XCreatePixmap(xr->disp, RootWindow(xr->disp, xr->screen),
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xr->image->width, xr->image->height, xr->image->depth);
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if (pm == 0)
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return(0);
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put_raster(pm, 0, 0, xr);
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return(xr->pm = pm);
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}
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unmap_rcolors(xr) /* free colors */
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register XRASTER *xr;
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{
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if (xr->pixels == NULL)
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return;
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XFreeColors(xr->disp, xr->cmap, xr->pixels, xr->ncolors, 0);
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if (xr->cmap != DefaultColormap(xr->disp, xr->screen))
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XFreeColormap(xr->disp, xr->cmap);
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free((char *)xr->pixels);
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xr->pixels = NULL;
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}
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free_rpixmap(xr) /* release Pixmap */
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register XRASTER *xr;
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{
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if (xr->pm == 0)
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return;
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XFreePixmap(xr->disp, xr->pm);
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xr->pm = 0;
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}
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free_raster(xr) /* free raster data */
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register XRASTER *xr;
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{
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free_rpixmap(xr);
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if (xr->ncolors > 0) {
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unmap_rcolors(xr);
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free((char *)xr->pmap);
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free((char *)xr->cdefs);
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}
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XDestroyImage(xr->image);
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XFreeGC(xr->disp, xr->gc);
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free((char *)xr);
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}
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