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/* Copyright 1990 Regents of the University of California */ |
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|
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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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/* |
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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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|
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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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|
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#include "x11raster.h" |
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|
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|
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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 == 24) { |
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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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depth==1 ? XYBitmap : ZPixmap, |
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0,data,width,height,bm_pad,0); |
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xr->image->bitmap_bit_order = MSBFirst; |
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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, AllPlanes); |
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return(xr); |
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} |
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|
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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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int 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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|
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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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|
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Colormap |
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newcmap(disp, scrn, w, vis) /* get colormap and fix b & w */ |
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Display *disp; |
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int scrn; |
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Window w; |
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Visual *vis; |
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{ |
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XColor thiscolor; |
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unsigned long *pixels; |
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Colormap cmap; |
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int n; |
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register int i, j; |
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|
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cmap = XCreateColormap(disp, w, vis, AllocNone); |
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if (cmap == 0) |
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return(0); |
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pixels=(unsigned long *)malloc(vis->map_entries*sizeof(unsigned long)); |
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if (pixels == NULL) |
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return(0); |
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for (n = vis->map_entries; n > 0; n--) |
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if (XAllocColorCells(disp, cmap, 0, NULL, 0, pixels, n) != 0) |
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break; |
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if (n == 0) |
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return(0); |
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/* reset black and white */ |
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for (i = 0; i < n; i++) { |
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if (pixels[i] != BlackPixel(disp,scrn) |
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&& pixels[i] != WhitePixel(disp,scrn)) |
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continue; |
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thiscolor.pixel = pixels[i]; |
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thiscolor.flags = DoRed|DoGreen|DoBlue; |
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XQueryColor(disp, DefaultColormap(disp,scrn), &thiscolor); |
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XStoreColor(disp, cmap, &thiscolor); |
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for (j = i; j+1 < n; j++) |
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pixels[j] = pixels[j+1]; |
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n--; |
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i--; |
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} |
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XFreeColors(disp, cmap, pixels, n, 0); |
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free((char *)pixels); |
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return(cmap); |
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} |
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|
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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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|
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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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else |
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xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual); |
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while (XAllocColorCells(xr->disp, xr->cmap, 0, |
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NULL, 0, xr->pixels, xr->ncolors) == 0) |
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if (xr->cmap == DefaultColormap(xr->disp, xr->screen)) |
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xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual); |
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else { |
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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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|
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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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|
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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, |
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DisplayPlanes(xr->disp, xr->screen)); |
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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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|
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|
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patch_raster(d, xsrc, ysrc, xdst, ydst, width, height, xr) /* redraw */ |
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Drawable d; |
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int xsrc, ysrc, xdst, ydst; |
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int width, height; |
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register XRASTER *xr; |
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{ |
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if (xsrc >= xr->image->width || ysrc >= xr->image->height) |
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return; |
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if (xsrc < 0) { |
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xdst -= xsrc; width += xsrc; |
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xsrc = 0; |
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} |
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if (ysrc < 0) { |
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ydst -= ysrc; height += ysrc; |
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ysrc = 0; |
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} |
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if (width <= 0 || height <= 0) |
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return; |
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if (xsrc + width > xr->image->width) |
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width = xr->image->width - xsrc; |
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if (ysrc + height > xr->image->height) |
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height = xr->image->height - ysrc; |
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|
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if (xr->pm == 0) |
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XPutImage(xr->disp, d, xr->gc, xr->image, xsrc, ysrc, |
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xdst, ydst, width, height); |
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else |
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XCopyArea(xr->disp, xr->pm, d, xr->gc, xsrc, ysrc, |
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width, height, xdst, ydst); |
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} |
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|
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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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|
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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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|
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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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} |
