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->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, d)                     /* make pixmap for raster */
register XRASTER        *xr;
Drawable        d;
{
        Pixmap  pm;

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