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- /* Copyright 1990 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)x11raster.c 2.7 10/12/92 LBL";
- #endif
-
- /*
- * x11raster.c - routines to handle images for X windows.
- *
- * 2/18/88
- */
-
- #include <stdio.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
-
- #include "color.h"
- #include "x11raster.h"
-
-
- XRASTER *
- make_raster(disp, vis, npixbits, data, width, height, bm_pad)
- Display *disp;
- XVisualInfo *vis;
- int npixbits;
- char *data;
- int width, height;
- int bm_pad;
- {
- static long swaptest = 1;
- register XRASTER *xr;
-
- if ((xr = (XRASTER *)calloc(1, sizeof(XRASTER))) == NULL)
- return(NULL);
- xr->disp = disp;
- xr->screen = vis->screen;
- xr->visual = vis->visual;
- if (npixbits == 1)
- xr->image = XCreateImage(disp,vis->visual,1,
- XYBitmap,0,data,width,height,bm_pad,0);
- else
- xr->image = XCreateImage(disp,vis->visual,vis->depth,
- ZPixmap,0,data,width,height,bm_pad,0);
- xr->image->bitmap_bit_order = MSBFirst;
- xr->image->bitmap_unit = bm_pad;
- xr->image->byte_order = *(char *)&swaptest ? LSBFirst : MSBFirst;
- if (vis->depth >= 24 && (xr->image->red_mask != 0xff ||
- xr->image->green_mask != 0xff00 ||
- xr->image->blue_mask != 0xff0000) &&
- (xr->image->red_mask != 0xff0000 ||
- xr->image->green_mask != 0xff00 ||
- xr->image->blue_mask != 0xff)) {
- xr->image->red_mask = 0xff;
- xr->image->green_mask = 0xff00;
- xr->image->blue_mask = 0xff0000;
- }
- xr->gc = 0;
- return(xr);
- }
-
-
- int
- init_rcolors(xr, cmap) /* initialize colors */
- register XRASTER *xr;
- BYTE cmap[][3];
- {
- register unsigned char *p;
- register int i;
-
- if (xr->image->depth > 8 | xr->ncolors != 0)
- return(xr->ncolors);
- xr->pmap = (short *)malloc(256*sizeof(short));
- if (xr->pmap == NULL)
- return(0);
- xr->cdefs = (XColor *)malloc(256*sizeof(XColor));
- if (xr->cdefs == NULL)
- return(0);
- for (i = 0; i < 256; i++)
- xr->pmap[i] = -1;
- for (p = (unsigned char *)xr->image->data,
- i = xr->image->width*xr->image->height;
- i--; p++)
- if (xr->pmap[*p] == -1) {
- xr->cdefs[xr->ncolors].red = cmap[*p][RED] << 8;
- xr->cdefs[xr->ncolors].green = cmap[*p][GRN] << 8;
- xr->cdefs[xr->ncolors].blue = cmap[*p][BLU] << 8;
- xr->cdefs[xr->ncolors].pixel = *p;
- xr->cdefs[xr->ncolors].flags = DoRed|DoGreen|DoBlue;
- xr->pmap[*p] = xr->ncolors++;
- }
- xr->cdefs = (XColor *)realloc((char *)xr->cdefs,
- xr->ncolors*sizeof(XColor));
- if (xr->cdefs == NULL)
- return(0);
- return(xr->ncolors);
- }
-
-
- Colormap
- newcmap(disp, scrn, w, vis) /* get colormap and fix b & w */
- Display *disp;
- int scrn;
- Window w;
- Visual *vis;
- {
- XColor thiscolor;
- unsigned long *pixels;
- Colormap cmap;
- int n;
- register int i, j;
-
- cmap = XCreateColormap(disp, w, vis, AllocNone);
- if (cmap == 0)
- return(0);
- pixels=(unsigned long *)malloc(vis->map_entries*sizeof(unsigned long));
- if (pixels == NULL)
- return(0);
- for (n = vis->map_entries; n > 0; n--)
- if (XAllocColorCells(disp, cmap, 0, NULL, 0, pixels, n) != 0)
- break;
- if (n == 0)
- return(0);
- /* reset black and white */
- for (i = 0; i < n; i++) {
- if (pixels[i] != BlackPixel(disp,scrn)
- && pixels[i] != WhitePixel(disp,scrn))
- continue;
- thiscolor.pixel = pixels[i];
- thiscolor.flags = DoRed|DoGreen|DoBlue;
- XQueryColor(disp, DefaultColormap(disp,scrn), &thiscolor);
- XStoreColor(disp, cmap, &thiscolor);
- for (j = i; j+1 < n; j++)
- pixels[j] = pixels[j+1];
- n--;
- i--;
- }
- XFreeColors(disp, cmap, pixels, n, 0);
- free((char *)pixels);
- return(cmap);
- }
-
-
- unsigned long *
- map_rcolors(xr, w) /* get and assign pixels */
- register XRASTER *xr;
- Window w;
- {
- register int i;
- register unsigned char *p;
-
- if (xr->ncolors == 0 || xr->image->depth > 8)
- return(NULL);
- if (xr->pixels != NULL)
- return(xr->pixels);
- xr->pixels = (unsigned long *)malloc(xr->ncolors*sizeof(unsigned long));
- if (xr->pixels == NULL)
- return(NULL);
- if (xr->visual == DefaultVisual(xr->disp, xr->screen))
- xr->cmap = DefaultColormap(xr->disp, xr->screen);
- else
- xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual);
- while (XAllocColorCells(xr->disp, xr->cmap, 0,
- NULL, 0, xr->pixels, xr->ncolors) == 0)
- if (xr->cmap == DefaultColormap(xr->disp, xr->screen))
- xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual);
- else {
- free((char *)xr->pixels);
- xr->pixels = NULL;
- return(NULL);
- }
- for (i = 0; i < xr->ncolors; i++)
- if (xr->pmap[xr->pixels[i]] == -1)
- break;
- if (i < xr->ncolors) { /* different pixels */
- for (p = (unsigned char *)xr->image->data,
- i = xr->image->width*xr->image->height;
- i--; p++)
- *p = xr->pixels[xr->pmap[*p]];
- for (i = 0; i < 256; i++)
- xr->pmap[i] = -1;
- for (i = 0; i < xr->ncolors; i++) {
- xr->cdefs[i].pixel = xr->pixels[i];
- xr->pmap[xr->pixels[i]] = i;
- }
- free_rpixmap(xr); /* Pixmap invalid */
- }
- XStoreColors(xr->disp, xr->cmap, xr->cdefs, xr->ncolors);
- XSetWindowColormap(xr->disp, w, xr->cmap);
- return(xr->pixels);
- }
-
-
- Pixmap
- make_rpixmap(xr, w) /* make pixmap for raster */
- register XRASTER *xr;
- Window w;
- {
- XWindowAttributes xwattr;
- Pixmap pm;
-
- if (xr->pm != 0)
- return(xr->pm);
- XGetWindowAttributes(xr->disp, w, &xwattr);
- pm = XCreatePixmap(xr->disp, w,
- xr->image->width, xr->image->height,
- xwattr.depth);
- if (pm == 0)
- return(0);
- put_raster(pm, 0, 0, xr);
- return(xr->pm = pm);
- }
-
-
- patch_raster(d, xsrc, ysrc, xdst, ydst, width, height, xr) /* redraw */
- Drawable d;
- int xsrc, ysrc, xdst, ydst;
- int width, height;
- register XRASTER *xr;
- {
- if (xsrc >= xr->image->width || ysrc >= xr->image->height)
- return;
- if (xsrc < 0) {
- xdst -= xsrc; width += xsrc;
- xsrc = 0;
- }
- if (ysrc < 0) {
- ydst -= ysrc; height += ysrc;
- ysrc = 0;
- }
- if (width <= 0 || height <= 0)
- return;
- if (xsrc + width > xr->image->width)
- width = xr->image->width - xsrc;
- if (ysrc + height > xr->image->height)
- height = xr->image->height - ysrc;
-
- if (xr->gc == 0) {
- xr->gc = XCreateGC(xr->disp, d, 0, 0);
- XSetState(xr->disp, xr->gc, BlackPixel(xr->disp,xr->screen),
- WhitePixel(xr->disp,xr->screen), GXcopy, AllPlanes);
- }
- if (xr->pm == 0)
- XPutImage(xr->disp, d, xr->gc, xr->image, xsrc, ysrc,
- xdst, ydst, width, height);
- else
- XCopyArea(xr->disp, xr->pm, d, xr->gc, xsrc, ysrc,
- width, height, xdst, ydst);
- }
-
-
- unmap_rcolors(xr) /* free colors */
- register XRASTER *xr;
- {
- if (xr->pixels == NULL)
- return;
- XFreeColors(xr->disp, xr->cmap, xr->pixels, xr->ncolors, 0);
- if (xr->cmap != DefaultColormap(xr->disp, xr->screen))
- XFreeColormap(xr->disp, xr->cmap);
- free((char *)xr->pixels);
- xr->pixels = NULL;
- }
-
-
- free_rpixmap(xr) /* release Pixmap */
- register XRASTER *xr;
- {
- if (xr->pm == 0)
- return;
- XFreePixmap(xr->disp, xr->pm);
- xr->pm = 0;
- }
-
-
- free_raster(xr) /* free raster data */
- register XRASTER *xr;
- {
- free_rpixmap(xr);
- if (xr->ncolors > 0) {
- unmap_rcolors(xr);
- free((char *)xr->pmap);
- free((char *)xr->cdefs);
- }
- XDestroyImage(xr->image);
- if (xr->gc != 0)
- XFreeGC(xr->disp, xr->gc);
- free((char *)xr);
- }
-