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X11RASTE.C
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1993-10-07
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288 lines
/* 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);
}