src/rt/vga.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 *  vga.c - driver for VGA graphics adaptor under MS-DOS
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *         notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */

#include  "standard.h"

#include  <graph.h>

#include  "driver.h"

#include  "color.h"

#define  GAMMA          2.2             /* exponent for color correction */


int  vga_close(), vga_clear(), vga_paintr(), vga_comout(), vga_errout(),
                vga_comin();

static struct driver  vga_driver = {
        vga_close, vga_clear, vga_paintr, NULL,
        vga_comout, vga_comin, NULL, 1.0
};

static char  fatalerr[128];

static struct videoconfig  config;

extern char  *getenv();


struct driver *
vga_init(name, id)                      /* open VGA */
char  *name, *id;
{
        static short  mode_pref[] = {_MRES256COLOR, -1};
        static short  smode_pref[] = {_XRES256COLOR, _SVRES256COLOR,
                                        _VRES256COLOR, _MRES256COLOR, -1};
        char  *ep;
        register short  *mp;

        mp = !strcmp(name, "vga") ? mode_pref : smode_pref;
        for ( ; *mp != -1; mp++)
                if (_setvideomode(*mp))
                        break;
        if (*mp == -1) {
                _setvideomode(_DEFAULTMODE);
                eputs(name);
                eputs(": card not present or insufficient VGA memory\n");
                return(NULL);
        }
        _getvideoconfig(&config);
        _settextwindow(config.numtextrows-2, 1,
                        config.numtextrows, config.numtextcols);
        vga_driver.xsiz = config.numxpixels;
        vga_driver.ysiz = (long)config.numypixels*(config.numtextrows-3)
                                /config.numtextrows;
        switch (config.mode) {                  /* correct problems */
        case _XRES256COLOR:
                vga_driver.ysiz -= 16;
                break;
        case _MRES256COLOR:
                vga_driver.pixaspect = 1.2;
                break;
        }
        _setviewport(0, 0, vga_driver.xsiz, vga_driver.ysiz);
        if ((ep = getenv("GAMMA")) != NULL)     /* make gamma map */
                make_gmap(atof(ep));
        else
                make_gmap(GAMMA);
        _remappalette(1, _BRIGHTWHITE);
        _settextcolor(1);
        ms_gcinit(&vga_driver);
        erract[USER].pf =
        erract[SYSTEM].pf =
        erract[INTERNAL].pf =
        erract[CONSISTENCY].pf = vga_errout;
        erract[COMMAND].pf = vga_comout;
        if (erract[WARNING].pf != NULL)
                erract[WARNING].pf = vga_comout;
        return(&vga_driver);
}


static
vga_close()                                     /* close VGA */
{
        ms_gcdone(&vga_driver);
        _setvideomode(_DEFAULTMODE);
        erract[USER].pf =                       /* reset error vector */
        erract[SYSTEM].pf =
        erract[INTERNAL].pf =
        erract[CONSISTENCY].pf = eputs;
        erract[COMMAND].pf = NULL;
        if (erract[WARNING].pf != NULL)
                erract[WARNING].pf = wputs;
        if (fatalerr[0])
                eputs(fatalerr);                /* repeat error message */
}


static
vga_clear(x, y)                                 /* clear VGA */
int  x, y;
{
        _clearscreen(_GCLEARSCREEN);
        new_ctab(config.numcolors-2);           /* init color table */
}


static
vga_paintr(col, xmin, ymin, xmax, ymax)         /* paint a rectangle */
COLOR  col;
int  xmin, ymin, xmax, ymax;
{
        extern int  vgacolr();

        _setcolor(get_pixel(col, vgacolr)+2);
        _rectangle(_GFILLINTERIOR, xmin, vga_driver.ysiz-ymax,
                        xmax-1, vga_driver.ysiz-1-ymin);
        vga_driver.inpready = kbhit();
}


static
vga_comout(s)                           /* put s to text output */
register char  *s;
{
        struct rccoord  tpos;
        char  buf[128];
        register char  *cp;

        for (cp = buf; ; s++) {
                switch (*s) {
                case '\b':
                case '\r':
                case '\0':
                        if (cp > buf) {
                                *cp = '\0';
                                _outtext(cp = buf);
                        }
                        if (*s == '\0')
                                break;
                        tpos = _gettextposition();
                        _settextposition(tpos.row, *s=='\r' ? 1 : tpos.col-1);
                        continue;
                default:
                        *cp++ = *s;
                        continue;
                }
                return(0);
        }
        fatalerr[0] = '\0';
}


static
vga_errout(msg)
register char  *msg;
{
        static char  *fep = fatalerr;

        _outtext(msg);
        while (*msg)
                *fep++ = *msg++;
        *fep = '\0';
        if (fep > fatalerr && fep[-1] == '\n')
                fep = fatalerr;
}


static
vga_comin(buf, prompt)                  /* get input line from console */
char  *buf;
char  *prompt;
{
        extern int  getch();

        if (prompt != NULL)
                _outtext(prompt);
        editline(buf, getch, vga_comout);
        vga_driver.inpready = kbhit();
}


static
vgacolr(index, r, g, b)                /* enter a color into our table */
int  index;
int  r, g, b;
{
        register long  cl;

        cl = (long)b<<14 & 0x3f0000L;
        cl |= g<<6 & 0x3f00;
        cl |= r>>2;
        _remappalette(index+2, cl);
}
Revision:	2.8
Committed:	Sat Feb 22 02:07:29 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.7:	+58 -4 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* vga.c - driver for VGA graphics adaptor under MS-DOS
6	*/
7
8	/* ====================================================================
9	* The Radiance Software License, Version 1.0
10	*
11	* Copyright (c) 1990 - 2002 The Regents of the University of California,
12	* through Lawrence Berkeley National Laboratory. All rights reserved.
13	*
14	* Redistribution and use in source and binary forms, with or without
15	* modification, are permitted provided that the following conditions
16	* are met:
17	*
18	* 1. Redistributions of source code must retain the above copyright
19	* notice, this list of conditions and the following disclaimer.
20	*
21	* 2. Redistributions in binary form must reproduce the above copyright
22	* notice, this list of conditions and the following disclaimer in
23	* the documentation and/or other materials provided with the
24	* distribution.
25	*
26	* 3. The end-user documentation included with the redistribution,
27	* if any, must include the following acknowledgment:
28	* "This product includes Radiance software
29	* (http://radsite.lbl.gov/)
30	* developed by the Lawrence Berkeley National Laboratory
31	* (http://www.lbl.gov/)."
32	* Alternately, this acknowledgment may appear in the software itself,
33	* if and wherever such third-party acknowledgments normally appear.
34	*
35	* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
36	* and "The Regents of the University of California" must
37	* not be used to endorse or promote products derived from this
38	* software without prior written permission. For written
39	* permission, please contact [email protected].
40	*
41	* 5. Products derived from this software may not be called "Radiance",
42	* nor may "Radiance" appear in their name, without prior written
43	* permission of Lawrence Berkeley National Laboratory.
44	*
45	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
46	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
48	* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
49	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
52	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
53	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
54	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
55	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56	* SUCH DAMAGE.
57	* ====================================================================
58	*
59	* This software consists of voluntary contributions made by many
60	* individuals on behalf of Lawrence Berkeley National Laboratory. For more
61	* information on Lawrence Berkeley National Laboratory, please see
62	* <http://www.lbl.gov/>.
63	*/
64
65	#include "standard.h"
66
67	#include <graph.h>
68
69	#include "driver.h"
70
71	#include "color.h"
72
73	#define GAMMA 2.2 /* exponent for color correction */
74
75
76	int vga_close(), vga_clear(), vga_paintr(), vga_comout(), vga_errout(),
77	vga_comin();
78
79	static struct driver vga_driver = {
80	vga_close, vga_clear, vga_paintr, NULL,
81	vga_comout, vga_comin, NULL, 1.0
82	};
83
84	static char fatalerr[128];
85
86	static struct videoconfig config;
87
88	extern char *getenv();
89
90
91	struct driver *
92	vga_init(name, id) /* open VGA */
93	char name, id;
94	{
95	static short mode_pref[] = {_MRES256COLOR, -1};
96	static short smode_pref[] = {_XRES256COLOR, _SVRES256COLOR,
97	_VRES256COLOR, _MRES256COLOR, -1};
98	char *ep;
99	register short *mp;
100
101	mp = !strcmp(name, "vga") ? mode_pref : smode_pref;
102	for ( ; *mp != -1; mp++)
103	if (_setvideomode(*mp))
104	break;
105	if (*mp == -1) {
106	_setvideomode(_DEFAULTMODE);
107	eputs(name);
108	eputs(": card not present or insufficient VGA memory\n");
109	return(NULL);
110	}
111	_getvideoconfig(&config);
112	_settextwindow(config.numtextrows-2, 1,
113	config.numtextrows, config.numtextcols);
114	vga_driver.xsiz = config.numxpixels;
115	vga_driver.ysiz = (long)config.numypixels*(config.numtextrows-3)
116	/config.numtextrows;
117	switch (config.mode) { /* correct problems */
118	case _XRES256COLOR:
119	vga_driver.ysiz -= 16;
120	break;
121	case _MRES256COLOR:
122	vga_driver.pixaspect = 1.2;
123	break;
124	}
125	_setviewport(0, 0, vga_driver.xsiz, vga_driver.ysiz);
126	if ((ep = getenv("GAMMA")) != NULL) /* make gamma map */
127	make_gmap(atof(ep));
128	else
129	make_gmap(GAMMA);
130	_remappalette(1, _BRIGHTWHITE);
131	_settextcolor(1);
132	ms_gcinit(&vga_driver);
133	erract[USER].pf =
134	erract[SYSTEM].pf =
135	erract[INTERNAL].pf =
136	erract[CONSISTENCY].pf = vga_errout;
137	erract[COMMAND].pf = vga_comout;
138	if (erract[WARNING].pf != NULL)
139	erract[WARNING].pf = vga_comout;
140	return(&vga_driver);
141	}
142
143
144	static
145	vga_close() /* close VGA */
146	{
147	ms_gcdone(&vga_driver);
148	_setvideomode(_DEFAULTMODE);
149	erract[USER].pf = /* reset error vector */
150	erract[SYSTEM].pf =
151	erract[INTERNAL].pf =
152	erract[CONSISTENCY].pf = eputs;
153	erract[COMMAND].pf = NULL;
154	if (erract[WARNING].pf != NULL)
155	erract[WARNING].pf = wputs;
156	if (fatalerr[0])
157	eputs(fatalerr); /* repeat error message */
158	}
159
160
161	static
162	vga_clear(x, y) /* clear VGA */
163	int x, y;
164	{
165	_clearscreen(_GCLEARSCREEN);
166	new_ctab(config.numcolors-2); /* init color table */
167	}
168
169
170	static
171	vga_paintr(col, xmin, ymin, xmax, ymax) /* paint a rectangle */
172	COLOR col;
173	int xmin, ymin, xmax, ymax;
174	{
175	extern int vgacolr();
176
177	_setcolor(get_pixel(col, vgacolr)+2);
178	_rectangle(_GFILLINTERIOR, xmin, vga_driver.ysiz-ymax,
179	xmax-1, vga_driver.ysiz-1-ymin);
180	vga_driver.inpready = kbhit();
181	}
182
183
184	static
185	vga_comout(s) /* put s to text output */
186	register char *s;
187	{
188	struct rccoord tpos;
189	char buf[128];
190	register char *cp;
191
192	for (cp = buf; ; s++) {
193	switch (*s) {
194	case '\b':
195	case '\r':
196	case '\0':
197	if (cp > buf) {
198	*cp = '\0';
199	_outtext(cp = buf);
200	}
201	if (*s == '\0')
202	break;
203	tpos = _gettextposition();
204	_settextposition(tpos.row, *s=='\r' ? 1 : tpos.col-1);
205	continue;
206	default:
207	cp++ = s;
208	continue;
209	}
210	return(0);
211	}
212	fatalerr[0] = '\0';
213	}
214
215
216	static
217	vga_errout(msg)
218	register char *msg;
219	{
220	static char *fep = fatalerr;
221
222	_outtext(msg);
223	while (*msg)
224	fep++ = msg++;
225	*fep = '\0';
226	if (fep > fatalerr && fep[-1] == '\n')
227	fep = fatalerr;
228	}
229
230
231	static
232	vga_comin(buf, prompt) /* get input line from console */
233	char *buf;
234	char *prompt;
235	{
236	extern int getch();
237
238	if (prompt != NULL)
239	_outtext(prompt);
240	editline(buf, getch, vga_comout);
241	vga_driver.inpready = kbhit();
242	}
243
244
245	static
246	vgacolr(index, r, g, b) /* enter a color into our table */
247	int index;
248	int r, g, b;
249	{
250	register long cl;
251
252	cl = (long)b<<14 & 0x3f0000L;
253	cl \|= g<<6 & 0x3f00;
254	cl \|= r>>2;
255	_remappalette(index+2, cl);
256	}