src/px/x11raster.c

/* Copyright 1990 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ 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 "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, rmap, gmap, bmap)              /* initialize colors */
register XRASTER        *xr;
int     rmap[256], gmap[256], bmap[256];
{
        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 = rmap[*p] << 8;
                        xr->cdefs[xr->ncolors].green = gmap[*p] << 8;
                        xr->cdefs[xr->ncolors].blue = bmap[*p] << 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);
}
Revision:	2.6
Committed:	Thu May 28 09:39:22 1992 UTC (31 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.5:	+9 -6 lines
Log Message:	further refinements for grayscale and odd devices
#	User	Rev	Content
1	greg	1.1	/* Copyright 1990 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* x11raster.c - routines to handle images for X windows.
9			*
10			* 2/18/88
11			*/
12
13			#include <stdio.h>
14			#include <X11/Xlib.h>
15			#include <X11/Xutil.h>
16
17			#include "x11raster.h"
18
19
20			XRASTER *
21	greg	2.5	make_raster(disp, vis, npixbits, data, width, height, bm_pad)
22	greg	1.1	Display *disp;
23	greg	2.5	XVisualInfo *vis;
24			int npixbits;
25	greg	1.1	char *data;
26			int width, height;
27			int bm_pad;
28			{
29	greg	2.5	static long swaptest = 1;
30	greg	1.1	register XRASTER *xr;
31	greg	2.5
32	greg	1.1	if ((xr = (XRASTER *)calloc(1, sizeof(XRASTER))) == NULL)
33			return(NULL);
34			xr->disp = disp;
35	greg	2.5	xr->screen = vis->screen;
36			xr->visual = vis->visual;
37			if (npixbits == 1)
38			xr->image = XCreateImage(disp,vis->visual,1,
39			XYBitmap,0,data,width,height,bm_pad,0);
40			else
41			xr->image = XCreateImage(disp,vis->visual,vis->depth,
42			ZPixmap,0,data,width,height,bm_pad,0);
43	greg	2.4	xr->image->bitmap_bit_order = MSBFirst;
44	greg	2.6	xr->image->bitmap_unit = bm_pad;
45	greg	2.5	xr->image->byte_order = (char )&swaptest ? LSBFirst : MSBFirst;
46			if (vis->depth >= 24 && (xr->image->red_mask != 0xff \|\|
47			xr->image->green_mask != 0xff00 \|\|
48			xr->image->blue_mask != 0xff0000) &&
49			(xr->image->red_mask != 0xff0000 \|\|
50			xr->image->green_mask != 0xff00 \|\|
51			xr->image->blue_mask != 0xff)) {
52			xr->image->red_mask = 0xff;
53			xr->image->green_mask = 0xff00;
54			xr->image->blue_mask = 0xff0000;
55	greg	1.4	}
56	greg	2.5	xr->gc = 0;
57	greg	1.1	return(xr);
58			}
59
60
61			int
62			init_rcolors(xr, rmap, gmap, bmap) /* initialize colors */
63			register XRASTER *xr;
64	greg	1.3	int rmap[256], gmap[256], bmap[256];
65	greg	1.1	{
66			register unsigned char *p;
67			register int i;
68
69	greg	2.6	if (xr->image->depth > 8 \|\| xr->ncolors != 0)
70	greg	1.1	return(xr->ncolors);
71			xr->pmap = (short )malloc(256sizeof(short));
72			if (xr->pmap == NULL)
73			return(0);
74			xr->cdefs = (XColor )malloc(256sizeof(XColor));
75			if (xr->cdefs == NULL)
76			return(0);
77			for (i = 0; i < 256; i++)
78			xr->pmap[i] = -1;
79			for (p = (unsigned char *)xr->image->data,
80			i = xr->image->width*xr->image->height;
81			i--; p++)
82			if (xr->pmap[*p] == -1) {
83			xr->cdefs[xr->ncolors].red = rmap[*p] << 8;
84			xr->cdefs[xr->ncolors].green = gmap[*p] << 8;
85			xr->cdefs[xr->ncolors].blue = bmap[*p] << 8;
86			xr->cdefs[xr->ncolors].pixel = *p;
87			xr->cdefs[xr->ncolors].flags = DoRed\|DoGreen\|DoBlue;
88			xr->pmap[*p] = xr->ncolors++;
89			}
90			xr->cdefs = (XColor )realloc((char )xr->cdefs,
91			xr->ncolors*sizeof(XColor));
92			if (xr->cdefs == NULL)
93			return(0);
94			return(xr->ncolors);
95			}
96
97	greg	2.5
98	greg	1.3	Colormap
99			newcmap(disp, scrn, w, vis) /* get colormap and fix b & w */
100			Display *disp;
101			int scrn;
102			Window w;
103			Visual *vis;
104			{
105			XColor thiscolor;
106			unsigned long *pixels;
107			Colormap cmap;
108			int n;
109			register int i, j;
110	greg	1.1
111	greg	1.3	cmap = XCreateColormap(disp, w, vis, AllocNone);
112			if (cmap == 0)
113			return(0);
114			pixels=(unsigned long )malloc(vis->map_entriessizeof(unsigned long));
115			if (pixels == NULL)
116			return(0);
117			for (n = vis->map_entries; n > 0; n--)
118			if (XAllocColorCells(disp, cmap, 0, NULL, 0, pixels, n) != 0)
119			break;
120			if (n == 0)
121			return(0);
122			/* reset black and white */
123			for (i = 0; i < n; i++) {
124			if (pixels[i] != BlackPixel(disp,scrn)
125			&& pixels[i] != WhitePixel(disp,scrn))
126			continue;
127			thiscolor.pixel = pixels[i];
128			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
129			XQueryColor(disp, DefaultColormap(disp,scrn), &thiscolor);
130			XStoreColor(disp, cmap, &thiscolor);
131			for (j = i; j+1 < n; j++)
132			pixels[j] = pixels[j+1];
133			n--;
134			i--;
135			}
136			XFreeColors(disp, cmap, pixels, n, 0);
137			free((char *)pixels);
138			return(cmap);
139			}
140
141
142	greg	1.1	unsigned long *
143			map_rcolors(xr, w) /* get and assign pixels */
144			register XRASTER *xr;
145			Window w;
146			{
147			register int i;
148			register unsigned char *p;
149
150	greg	2.6	if (xr->ncolors == 0 \|\| xr->image->depth > 8)
151	greg	1.1	return(NULL);
152			if (xr->pixels != NULL)
153			return(xr->pixels);
154			xr->pixels = (unsigned long )malloc(xr->ncolorssizeof(unsigned long));
155			if (xr->pixels == NULL)
156			return(NULL);
157	greg	1.3	if (xr->visual == DefaultVisual(xr->disp, xr->screen))
158	greg	1.1	xr->cmap = DefaultColormap(xr->disp, xr->screen);
159	greg	1.3	else
160			xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual);
161			while (XAllocColorCells(xr->disp, xr->cmap, 0,
162			NULL, 0, xr->pixels, xr->ncolors) == 0)
163	greg	1.1	if (xr->cmap == DefaultColormap(xr->disp, xr->screen))
164	greg	1.3	xr->cmap = newcmap(xr->disp, xr->screen, w, xr->visual);
165			else {
166			free((char *)xr->pixels);
167			xr->pixels = NULL;
168			return(NULL);
169			}
170	greg	1.1	for (i = 0; i < xr->ncolors; i++)
171			if (xr->pmap[xr->pixels[i]] == -1)
172			break;
173			if (i < xr->ncolors) { /* different pixels */
174			for (p = (unsigned char *)xr->image->data,
175			i = xr->image->width*xr->image->height;
176			i--; p++)
177			p = xr->pixels[xr->pmap[p]];
178			for (i = 0; i < 256; i++)
179			xr->pmap[i] = -1;
180			for (i = 0; i < xr->ncolors; i++) {
181			xr->cdefs[i].pixel = xr->pixels[i];
182			xr->pmap[xr->pixels[i]] = i;
183			}
184			free_rpixmap(xr); /* Pixmap invalid */
185			}
186			XStoreColors(xr->disp, xr->cmap, xr->cdefs, xr->ncolors);
187			XSetWindowColormap(xr->disp, w, xr->cmap);
188			return(xr->pixels);
189			}
190
191
192			Pixmap
193	greg	2.6	make_rpixmap(xr, w) /* make pixmap for raster */
194	greg	1.1	register XRASTER *xr;
195	greg	2.6	Window w;
196	greg	1.1	{
197	greg	2.6	XWindowAttributes xwattr;
198	greg	1.1	Pixmap pm;
199
200			if (xr->pm != 0)
201			return(xr->pm);
202	greg	2.6	XGetWindowAttributes(xr->disp, w, &xwattr);
203			pm = XCreatePixmap(xr->disp, w,
204	greg	1.3	xr->image->width, xr->image->height,
205	greg	2.6	xwattr.depth);
206	greg	1.1	if (pm == 0)
207			return(0);
208			put_raster(pm, 0, 0, xr);
209			return(xr->pm = pm);
210	greg	1.2	}
211
212
213			patch_raster(d, xsrc, ysrc, xdst, ydst, width, height, xr) /* redraw */
214			Drawable d;
215			int xsrc, ysrc, xdst, ydst;
216			int width, height;
217			register XRASTER *xr;
218			{
219			if (xsrc >= xr->image->width \|\| ysrc >= xr->image->height)
220			return;
221			if (xsrc < 0) {
222			xdst -= xsrc; width += xsrc;
223			xsrc = 0;
224			}
225			if (ysrc < 0) {
226			ydst -= ysrc; height += ysrc;
227			ysrc = 0;
228			}
229			if (width <= 0 \|\| height <= 0)
230			return;
231			if (xsrc + width > xr->image->width)
232			width = xr->image->width - xsrc;
233			if (ysrc + height > xr->image->height)
234			height = xr->image->height - ysrc;
235
236	greg	2.5	if (xr->gc == 0) {
237			xr->gc = XCreateGC(xr->disp, d, 0, 0);
238			XSetState(xr->disp, xr->gc, BlackPixel(xr->disp,xr->screen),
239			WhitePixel(xr->disp,xr->screen), GXcopy, AllPlanes);
240			}
241	greg	1.2	if (xr->pm == 0)
242			XPutImage(xr->disp, d, xr->gc, xr->image, xsrc, ysrc,
243			xdst, ydst, width, height);
244			else
245			XCopyArea(xr->disp, xr->pm, d, xr->gc, xsrc, ysrc,
246			width, height, xdst, ydst);
247	greg	1.1	}
248
249
250			unmap_rcolors(xr) /* free colors */
251			register XRASTER *xr;
252			{
253			if (xr->pixels == NULL)
254			return;
255			XFreeColors(xr->disp, xr->cmap, xr->pixels, xr->ncolors, 0);
256			if (xr->cmap != DefaultColormap(xr->disp, xr->screen))
257			XFreeColormap(xr->disp, xr->cmap);
258			free((char *)xr->pixels);
259			xr->pixels = NULL;
260			}
261
262
263			free_rpixmap(xr) /* release Pixmap */
264			register XRASTER *xr;
265			{
266			if (xr->pm == 0)
267			return;
268			XFreePixmap(xr->disp, xr->pm);
269			xr->pm = 0;
270			}
271
272
273			free_raster(xr) /* free raster data */
274			register XRASTER *xr;
275			{
276			free_rpixmap(xr);
277			if (xr->ncolors > 0) {
278			unmap_rcolors(xr);
279			free((char *)xr->pmap);
280			free((char *)xr->cdefs);
281			}
282			XDestroyImage(xr->image);
283	greg	2.5	if (xr->gc != 0)
284			XFreeGC(xr->disp, xr->gc);
285	greg	1.1	free((char *)xr);
286			}