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 "color.h"
#include "x11raster.h"

extern char  *malloc(), *realloc(), *calloc();


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, vis)                /* get colormap and fix b & w */
Display *disp;
int     scrn;
Visual  *vis;
{
        XColor  thiscolor;
        unsigned long   *pixels;
        Colormap        cmap;
        int     n;
        register int    i, j;

        cmap = XCreateColormap(disp, RootWindow(disp,scrn), vis, AllocNone);
        if (cmap == 0 || vis->class != PseudoColor)
                return(cmap);
        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, 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, 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:	2.9
Committed:	Wed Nov 23 14:24:32 1994 UTC (29 years, 5 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.8:	+7 -8 lines
Log Message:	fixed unnecessary color table allocation
#	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	greg	2.7	#include "color.h"
18	greg	1.1	#include "x11raster.h"
19
20	greg	2.8	extern char malloc(), realloc(), *calloc();
21
22	greg	1.1
23			XRASTER *
24	greg	2.5	make_raster(disp, vis, npixbits, data, width, height, bm_pad)
25	greg	1.1	Display *disp;
26	greg	2.5	XVisualInfo *vis;
27			int npixbits;
28	greg	1.1	char *data;
29			int width, height;
30			int bm_pad;
31			{
32	greg	2.5	static long swaptest = 1;
33	greg	1.1	register XRASTER *xr;
34	greg	2.5
35	greg	1.1	if ((xr = (XRASTER *)calloc(1, sizeof(XRASTER))) == NULL)
36			return(NULL);
37			xr->disp = disp;
38	greg	2.5	xr->screen = vis->screen;
39			xr->visual = vis->visual;
40			if (npixbits == 1)
41			xr->image = XCreateImage(disp,vis->visual,1,
42			XYBitmap,0,data,width,height,bm_pad,0);
43			else
44			xr->image = XCreateImage(disp,vis->visual,vis->depth,
45			ZPixmap,0,data,width,height,bm_pad,0);
46	greg	2.4	xr->image->bitmap_bit_order = MSBFirst;
47	greg	2.6	xr->image->bitmap_unit = bm_pad;
48	greg	2.5	xr->image->byte_order = (char )&swaptest ? LSBFirst : MSBFirst;
49			if (vis->depth >= 24 && (xr->image->red_mask != 0xff \|\|
50			xr->image->green_mask != 0xff00 \|\|
51			xr->image->blue_mask != 0xff0000) &&
52			(xr->image->red_mask != 0xff0000 \|\|
53			xr->image->green_mask != 0xff00 \|\|
54			xr->image->blue_mask != 0xff)) {
55			xr->image->red_mask = 0xff;
56			xr->image->green_mask = 0xff00;
57			xr->image->blue_mask = 0xff0000;
58	greg	1.4	}
59	greg	2.5	xr->gc = 0;
60	greg	1.1	return(xr);
61			}
62
63
64			int
65	greg	2.7	init_rcolors(xr, cmap) /* initialize colors */
66	greg	1.1	register XRASTER *xr;
67	greg	2.7	BYTE cmap[][3];
68	greg	1.1	{
69			register unsigned char *p;
70			register int i;
71
72	greg	2.7	if (xr->image->depth > 8 \| xr->ncolors != 0)
73	greg	1.1	return(xr->ncolors);
74			xr->pmap = (short )malloc(256sizeof(short));
75			if (xr->pmap == NULL)
76			return(0);
77			xr->cdefs = (XColor )malloc(256sizeof(XColor));
78			if (xr->cdefs == NULL)
79			return(0);
80			for (i = 0; i < 256; i++)
81			xr->pmap[i] = -1;
82			for (p = (unsigned char *)xr->image->data,
83			i = xr->image->width*xr->image->height;
84			i--; p++)
85			if (xr->pmap[*p] == -1) {
86	greg	2.7	xr->cdefs[xr->ncolors].red = cmap[*p][RED] << 8;
87			xr->cdefs[xr->ncolors].green = cmap[*p][GRN] << 8;
88			xr->cdefs[xr->ncolors].blue = cmap[*p][BLU] << 8;
89	greg	1.1	xr->cdefs[xr->ncolors].pixel = *p;
90			xr->cdefs[xr->ncolors].flags = DoRed\|DoGreen\|DoBlue;
91			xr->pmap[*p] = xr->ncolors++;
92			}
93			xr->cdefs = (XColor )realloc((char )xr->cdefs,
94			xr->ncolors*sizeof(XColor));
95			if (xr->cdefs == NULL)
96			return(0);
97			return(xr->ncolors);
98			}
99
100	greg	2.5
101	greg	1.3	Colormap
102	greg	2.9	newcmap(disp, scrn, vis) /* get colormap and fix b & w */
103	greg	1.3	Display *disp;
104			int scrn;
105			Visual *vis;
106			{
107			XColor thiscolor;
108			unsigned long *pixels;
109			Colormap cmap;
110			int n;
111			register int i, j;
112	greg	1.1
113	greg	2.9	cmap = XCreateColormap(disp, RootWindow(disp,scrn), vis, AllocNone);
114			if (cmap == 0 \|\| vis->class != PseudoColor)
115			return(cmap);
116	greg	1.3	pixels=(unsigned long )malloc(vis->map_entriessizeof(unsigned long));
117			if (pixels == NULL)
118			return(0);
119			for (n = vis->map_entries; n > 0; n--)
120			if (XAllocColorCells(disp, cmap, 0, NULL, 0, pixels, n) != 0)
121			break;
122			if (n == 0)
123			return(0);
124			/* reset black and white */
125			for (i = 0; i < n; i++) {
126			if (pixels[i] != BlackPixel(disp,scrn)
127			&& pixels[i] != WhitePixel(disp,scrn))
128			continue;
129			thiscolor.pixel = pixels[i];
130			thiscolor.flags = DoRed\|DoGreen\|DoBlue;
131			XQueryColor(disp, DefaultColormap(disp,scrn), &thiscolor);
132			XStoreColor(disp, cmap, &thiscolor);
133			for (j = i; j+1 < n; j++)
134			pixels[j] = pixels[j+1];
135			n--;
136			i--;
137			}
138			XFreeColors(disp, cmap, pixels, n, 0);
139			free((char *)pixels);
140			return(cmap);
141			}
142
143
144	greg	1.1	unsigned long *
145	greg	2.9	map_rcolors(xr, w) /* get and assign pixels */
146	greg	1.1	register XRASTER *xr;
147			Window w;
148			{
149			register int i;
150			register unsigned char *p;
151
152	greg	2.6	if (xr->ncolors == 0 \|\| xr->image->depth > 8)
153	greg	1.1	return(NULL);
154			if (xr->pixels != NULL)
155			return(xr->pixels);
156			xr->pixels = (unsigned long )malloc(xr->ncolorssizeof(unsigned long));
157			if (xr->pixels == NULL)
158			return(NULL);
159	greg	1.3	if (xr->visual == DefaultVisual(xr->disp, xr->screen))
160	greg	1.1	xr->cmap = DefaultColormap(xr->disp, xr->screen);
161	greg	1.3	else
162	greg	2.9	xr->cmap = newcmap(xr->disp, xr->screen, xr->visual);
163	greg	1.3	while (XAllocColorCells(xr->disp, xr->cmap, 0,
164			NULL, 0, xr->pixels, xr->ncolors) == 0)
165	greg	1.1	if (xr->cmap == DefaultColormap(xr->disp, xr->screen))
166	greg	2.9	xr->cmap = newcmap(xr->disp, xr->screen, xr->visual);
167	greg	1.3	else {
168			free((char *)xr->pixels);
169			xr->pixels = NULL;
170			return(NULL);
171			}
172	greg	1.1	for (i = 0; i < xr->ncolors; i++)
173			if (xr->pmap[xr->pixels[i]] == -1)
174			break;
175			if (i < xr->ncolors) { /* different pixels */
176			for (p = (unsigned char *)xr->image->data,
177			i = xr->image->width*xr->image->height;
178			i--; p++)
179			p = xr->pixels[xr->pmap[p]];
180			for (i = 0; i < 256; i++)
181			xr->pmap[i] = -1;
182			for (i = 0; i < xr->ncolors; i++) {
183			xr->cdefs[i].pixel = xr->pixels[i];
184			xr->pmap[xr->pixels[i]] = i;
185			}
186			free_rpixmap(xr); /* Pixmap invalid */
187			}
188			XStoreColors(xr->disp, xr->cmap, xr->cdefs, xr->ncolors);
189			XSetWindowColormap(xr->disp, w, xr->cmap);
190			return(xr->pixels);
191			}
192
193
194			Pixmap
195	greg	2.6	make_rpixmap(xr, w) /* make pixmap for raster */
196	greg	1.1	register XRASTER *xr;
197	greg	2.6	Window w;
198	greg	1.1	{
199	greg	2.6	XWindowAttributes xwattr;
200	greg	1.1	Pixmap pm;
201
202			if (xr->pm != 0)
203			return(xr->pm);
204	greg	2.6	XGetWindowAttributes(xr->disp, w, &xwattr);
205			pm = XCreatePixmap(xr->disp, w,
206	greg	1.3	xr->image->width, xr->image->height,
207	greg	2.6	xwattr.depth);
208	greg	1.1	if (pm == 0)
209			return(0);
210			put_raster(pm, 0, 0, xr);
211			return(xr->pm = pm);
212	greg	1.2	}
213
214
215			patch_raster(d, xsrc, ysrc, xdst, ydst, width, height, xr) /* redraw */
216			Drawable d;
217			int xsrc, ysrc, xdst, ydst;
218			int width, height;
219			register XRASTER *xr;
220			{
221			if (xsrc >= xr->image->width \|\| ysrc >= xr->image->height)
222			return;
223			if (xsrc < 0) {
224			xdst -= xsrc; width += xsrc;
225			xsrc = 0;
226			}
227			if (ysrc < 0) {
228			ydst -= ysrc; height += ysrc;
229			ysrc = 0;
230			}
231			if (width <= 0 \|\| height <= 0)
232			return;
233			if (xsrc + width > xr->image->width)
234			width = xr->image->width - xsrc;
235			if (ysrc + height > xr->image->height)
236			height = xr->image->height - ysrc;
237
238	greg	2.5	if (xr->gc == 0) {
239			xr->gc = XCreateGC(xr->disp, d, 0, 0);
240			XSetState(xr->disp, xr->gc, BlackPixel(xr->disp,xr->screen),
241			WhitePixel(xr->disp,xr->screen), GXcopy, AllPlanes);
242			}
243	greg	1.2	if (xr->pm == 0)
244			XPutImage(xr->disp, d, xr->gc, xr->image, xsrc, ysrc,
245			xdst, ydst, width, height);
246			else
247			XCopyArea(xr->disp, xr->pm, d, xr->gc, xsrc, ysrc,
248			width, height, xdst, ydst);
249	greg	1.1	}
250
251
252			unmap_rcolors(xr) /* free colors */
253			register XRASTER *xr;
254			{
255			if (xr->pixels == NULL)
256			return;
257			XFreeColors(xr->disp, xr->cmap, xr->pixels, xr->ncolors, 0);
258			if (xr->cmap != DefaultColormap(xr->disp, xr->screen))
259			XFreeColormap(xr->disp, xr->cmap);
260			free((char *)xr->pixels);
261			xr->pixels = NULL;
262			}
263
264
265			free_rpixmap(xr) /* release Pixmap */
266			register XRASTER *xr;
267			{
268			if (xr->pm == 0)
269			return;
270			XFreePixmap(xr->disp, xr->pm);
271			xr->pm = 0;
272			}
273
274
275			free_raster(xr) /* free raster data */
276			register XRASTER *xr;
277			{
278			free_rpixmap(xr);
279			if (xr->ncolors > 0) {
280			unmap_rcolors(xr);
281			free((char *)xr->pmap);
282			free((char *)xr->cdefs);
283			}
284			XDestroyImage(xr->image);
285	greg	2.5	if (xr->gc != 0)
286			XFreeGC(xr->disp, xr->gc);
287	greg	1.1	free((char *)xr);
288			}