Annotation of OpenXM_contrib/gnuplot/term/djsvga.trm, Revision 1.1.1.1
1.1 maekawa 1: /*
2: * $Id: djsvga.trm,v 1.17 1998/04/14 00:17:36 drd Exp $
3: */
4:
5: /* GNUPLOT - djsvga.trm */
6:
7: /*[
8: * Copyright 1992 - 1993, 1998
9: *
10: * Permission to use, copy, and distribute this software and its
11: * documentation for any purpose with or without fee is hereby granted,
12: * provided that the above copyright notice appear in all copies and
13: * that both that copyright notice and this permission notice appear
14: * in supporting documentation.
15: *
16: * Permission to modify the software is granted, but not the right to
17: * distribute the complete modified source code. Modifications are to
18: * be distributed as patches to the released version. Permission to
19: * distribute binaries produced by compiling modified sources is granted,
20: * provided you
21: * 1. distribute the corresponding source modifications from the
22: * released version in the form of a patch file along with the binaries,
23: * 2. add special version identification to distinguish your version
24: * in addition to the base release version number,
25: * 3. provide your name and address as the primary contact for the
26: * support of your modified version, and
27: * 4. retain our contact information in regard to use of the base
28: * software.
29: * Permission to distribute the released version of the source code along
30: * with corresponding source modifications in the form of a patch file is
31: * granted with same provisions 2 through 4 for binary distributions.
32: *
33: * This software is provided "as is" without express or implied warranty
34: * to the extent permitted by applicable law.
35: ]*/
36:
37: /*
38: * This file is included by ../term.c.
39: *
40: * This terminal driver supports:
41: * svga
42: *
43: * AUTHORS
44: * Russell Lang
45: * Edzer Pebesma (gnuplot 3.6: new terminal layout, fonts, grx20)
46: * Hans-Bernhard Broeker (several improvements)
47: *
48: * send your comments or suggestions to (info-gnuplot@dartmouth.edu).
49: *
50: */
51:
52: /* HBB: A new version, called grx21a was released recently. To
53: * tell gnuplot you have it, add '-DGRX21' to your compilation flags.
54: * Currently, that only enables the drawing of wide lines. Maybe more
55: * to come.
56: */
57:
58: #include "driver.h"
59:
60: #ifdef TERM_REGISTER
61: register_term(djsvga) /* no ; */
62: #endif
63:
64: #ifdef TERM_PROTO
65: #define DJSVGA_XMAX 640
66: #define DJSVGA_YMAX 480
67:
68: #define DJSVGA_XLAST (DJSVGA_XMAX - 1)
69: #define DJSVGA_YLAST (DJSVGA_YMAX - 1)
70:
71: #define DJSVGA_VCHAR 16
72: #define DJSVGA_HCHAR 8
73: #define DJSVGA_VTIC 4
74: #define DJSVGA_HTIC 4
75:
76: TERM_PUBLIC void DJSVGA_init __PROTO((void));
77: TERM_PUBLIC void DJSVGA_graphics __PROTO((void));
78: TERM_PUBLIC void DJSVGA_text __PROTO((void));
79: TERM_PUBLIC void DJSVGA_reset __PROTO((void));
80: TERM_PUBLIC void DJSVGA_options __PROTO((void));
81: TERM_PUBLIC void DJSVGA_linetype __PROTO((int linetype));
82: TERM_PUBLIC void DJSVGA_move __PROTO((unsigned int x, unsigned int y));
83: TERM_PUBLIC void DJSVGA_vector __PROTO((unsigned int x, unsigned int y));
84: TERM_PUBLIC int DJSVGA_angle __PROTO((int ang));
85: TERM_PUBLIC int DJSVGA_justify_text __PROTO((enum JUSTIFY mode));
86: TERM_PUBLIC void DJSVGA_put_text __PROTO((unsigned int x, unsigned int y,
87: char *str));
88: TERM_PUBLIC int DJSVGA_set_font __PROTO((char *fontname));
89: TERM_PUBLIC void DJSVGA_suspend __PROTO((void));
90: TERM_PUBLIC void DJSVGA_resume __PROTO((void));
91: /* clear part of multiplot */
92: TERM_PUBLIC void DJSVGA_fillbox __PROTO((int style, unsigned int x1,
93: unsigned int y1, unsigned int width,
94: unsigned int height));
95: TERM_PUBLIC void DJSVGA_linewidth __PROTO((double linewidth));
96:
97: #define GOT_DJSVGA_PROTO
98: #endif /* TERM_PROTO */
99:
100: #ifndef TERM_PROTO_ONLY
101: #ifdef TERM_BODY
102:
103: /* SVGA driver using DJGPP */
104: #if (DJGPP==2)
105: # define GRX20
106: #endif
107: #ifdef GRX20
108: /* use grx20.h for DJGPP V1 / GRX V2 combo as well */
109: # include <grx20.h>
110: #else
111: # include <grx.h>
112: #endif
113: #include <pc.h>
114:
115: static int dj_startx, dj_starty;
116: static int dj_xlast, dj_ylast;
117: #define DJNUMCOLOR 15
118: /* HBB: Let's just use long for GRX1 as well */
119: static long dj_color;
120: static long svga256color[DJNUMCOLOR] =
121: {7, 8, 2, 3, 4, 5, 9, 14, 12, 15, 13, 10, 11, 1, 6};
122: static long dj_colors[DJNUMCOLOR];
123: #ifdef GRX20
124: /* Save, Restore: for 16 color mode! */
125: static void *DJSVGA_colorbuf = NULL;
126: #endif
127: static GrTextOption DJSVGA_TextOption;
128: /* HBB: I think we should use GR_NAMEWIDTH (=16), instead of MAX_ID_LEN,
129: * which has nothing to do with GRX at all */
130: #ifdef GRX20
131: char DJSVGA_fontname[MAX_ID_LEN + 1] = "";
132: #else
133: char DJSVGA_fontname[MAX_ID_LEN + 1] = "@:pc8x14.fnt"; /* EGA bios font */
134: #endif
135: static GrContext *DJSVGA_context = 0; /* save screen for suspend/resume */
136: static char *dj_textsave = 0; /* for text-screen-saving */
137: static int dj_cursorx, dj_cursory;
138: static int dj_width, dj_height;
139: #ifdef GRX21
140: static double dj_linewidth; /* store linewidth assignments here */
141: #endif
142:
143: TERM_PUBLIC void DJSVGA_init()
144: {
145: int i, on, r, g, b, medium = 170, low = 85;
146: GrFont *font = NULL;
147:
148: #ifdef GRX20
149: font = &GrDefaultFont;
150: #endif
151: /* HBB: save textscreen contents and cursor-position */
152: dj_textsave = gp_alloc(ScreenRows() * ScreenCols() * 2, "djsvga term scrbuf");
153: ScreenRetrieve(dj_textsave);
154: dj_width = ScreenCols();
155: dj_height = ScreenRows();
156: ScreenGetCursor(&dj_cursory, &dj_cursorx);
157: GrSetMode(GR_default_graphics);
158: GrSetRGBcolorMode();
159: GrResetColors();
160: /* Allocate colors */
161: for (i = 0; i < DJNUMCOLOR; i++) {
162: on = (svga256color[i] & 8) ? 255 : medium;
163: r = (svga256color[i] & 4) ? on : 0;
164: g = (svga256color[i] & 2) ? on : 0;
165: b = (svga256color[i] & 1) ? on : 0;
166: if (svga256color[i] == 8)
167: r = g = b = low;
168: dj_colors[i] = GrAllocColor(r, g, b);
169: }
170: /* Get the screen size: */
171: dj_xlast = GrMaxX();
172: term->xmax = dj_xlast + 1;
173: dj_ylast = GrMaxY();
174: term->ymax = dj_ylast + 1;
175: /* if GRX 1.x loads an GRX 2.x save'd file: */
176: if (font == NULL && DJSVGA_fontname[0] == '\0')
177: sprintf(DJSVGA_fontname, "@:pc8x14.fnt");
178:
179: if (DJSVGA_fontname[0] != '\0')
180: font = GrLoadFont(DJSVGA_fontname);
181: if (font == NULL)
182: font = GrLoadFont("@:pc8x14.fnt"); /* try EGA bios font */
183: if (font == NULL)
184: font = GrLoadFont("@:pc8x16.fnt"); /* try VGA bios font */
185: /*
186: * HBB: There are cases when we reach this point with font still NULL,
187: * eg. when the GRXFONT env.variable points to the GRX V1 fonts, but
188: * GRX V2 is used for this program: some fonts will *fail* to load in
189: * that setup (e.g. cour20b)! So IMHO, there should be some error
190: * treatment here..., like int_error("Couldn't load font!");
191: */
192: DJSVGA_TextOption.txo_font = font;
193: DJSVGA_TextOption.txo_direct = GR_TEXT_RIGHT;
194: DJSVGA_TextOption.txo_xalign = GR_ALIGN_LEFT;
195: DJSVGA_TextOption.txo_yalign = GR_ALIGN_CENTER;
196: DJSVGA_TextOption.txo_chrtype = GR_BYTE_TEXT;
197: DJSVGA_TextOption.txo_bgcolor.v = GrNOCOLOR;
198: #ifndef GRX20
199: DJSVGA_TextOption.txo_xmag = 1;
200: DJSVGA_TextOption.txo_ymag = 1;
201: #endif
202: /* HBB: this version should work in all configurations */
203: term->v_char = font->h.height;
204: term->h_char = font->h.width;
205:
206: #ifdef GRX20
207: if (DJSVGA_colorbuf == NULL)
208: DJSVGA_colorbuf = (void *) gp_alloc(GrColorSaveBufferSize(), "djsvga term colorbuf");
209: GrSaveColors(DJSVGA_colorbuf);
210: #endif
211: GrSetMode(GR_default_text);
212: ScreenUpdate(dj_textsave);
213: ScreenSetCursor(dj_cursory, dj_cursorx);
214: }
215:
216: /*
217: * HBB: make these two inline, as they're called by other routines
218: * inside this module, and -finline-functions (normally switched
219: * on by 'gcc -O3') doesn't work for compiling term.c
220: */
221: __inline__
222: TERM_PUBLIC void DJSVGA_graphics()
223: {
224: ScreenRetrieve(dj_textsave); /* HBB: save text screen contents */
225: ScreenGetCursor(&dj_cursory, &dj_cursorx);
226: GrSetMode(GR_default_graphics);
227: #ifdef GRX20
228: GrRestoreColors(DJSVGA_colorbuf);
229: #endif
230: }
231:
232: __inline__
233: TERM_PUBLIC void DJSVGA_text()
234: {
235: (void) getkey();
236: GrSetMode(GR_width_height_text, dj_width, dj_height);
237: ScreenUpdate(dj_textsave); /* HBB: restore text screen */
238: ScreenSetCursor(dj_cursory, dj_cursorx);
239: }
240:
241: TERM_PUBLIC void DJSVGA_reset()
242: {
243: GrResetColors();
244: free(dj_textsave);
245: }
246:
247: TERM_PUBLIC void DJSVGA_options()
248: {
249: if (!END_OF_COMMAND && isstring(c_token)) {
250: quote_str(DJSVGA_fontname, c_token, MAX_ID_LEN);
251: c_token++;
252: }
253: sprintf(term_options, "\"%s\"", DJSVGA_fontname);
254: }
255:
256: TERM_PUBLIC void DJSVGA_linetype(linetype)
257: int linetype;
258: {
259: if (linetype >= 13)
260: linetype %= 13;
261: /* HBB: set the TextOption color variable right here (faster) */
262: DJSVGA_TextOption.txo_fgcolor.v = dj_color = dj_colors[linetype + 2];
263: }
264:
265: TERM_PUBLIC void DJSVGA_move(x, y)
266: unsigned int x, y;
267: {
268: dj_startx = x;
269: dj_starty = y;
270: }
271:
272:
273: TERM_PUBLIC void DJSVGA_vector(x, y)
274: unsigned int x, y;
275: {
276: #ifdef GRX21
277: GrLineOption dj_lineoption =
278: {dj_color, dj_linewidth, 0, ""};
279:
280: GrCustomLine(dj_startx, dj_ylast - dj_starty, x, dj_ylast - y, &dj_lineoption);
281: #else
282: GrLine(dj_startx, dj_ylast - dj_starty, x, dj_ylast - y, dj_color);
283: #endif
284: dj_startx = x;
285: dj_starty = y;
286: }
287:
288: /*
289: * HBB: IMHO, the previous version was seriously flawed. E.g.
290: * in the termentry, _justify_text was pointing to the
291: * null_justify_text dummy routine, so DJSVGA_justify wasn't
292: * ever called at all. I copied the routines from my (now
293: * otherwise pointless) own private driver, djgrx.trm, to
294: * cure that.
295: */
296: TERM_PUBLIC int DJSVGA_angle(ang)
297: int ang;
298: {
299: if (ang) {
300: DJSVGA_TextOption.txo_direct = GR_TEXT_UP;
301: } else {
302: DJSVGA_TextOption.txo_direct = GR_TEXT_RIGHT;
303: }
304: return TRUE;
305: }
306:
307: TERM_PUBLIC int DJSVGA_justify_text(mode)
308: enum JUSTIFY mode;
309: {
310: if (DJSVGA_TextOption.txo_direct == GR_TEXT_RIGHT) {
311: DJSVGA_TextOption.txo_yalign = GR_ALIGN_CENTER;
312: switch (mode) {
313: case LEFT:
314: DJSVGA_TextOption.txo_xalign = GR_ALIGN_LEFT;
315: break;
316: case CENTRE:
317: DJSVGA_TextOption.txo_xalign = GR_ALIGN_CENTER;
318: break;
319: case RIGHT:
320: DJSVGA_TextOption.txo_xalign = GR_ALIGN_RIGHT;
321: break;
322: }
323: } else {
324: DJSVGA_TextOption.txo_xalign = GR_ALIGN_CENTER;
325: switch (mode) {
326: case LEFT:
327: DJSVGA_TextOption.txo_yalign = GR_ALIGN_BOTTOM;
328: break;
329: case CENTRE:
330: DJSVGA_TextOption.txo_yalign = GR_ALIGN_CENTER;
331: break;
332: case RIGHT:
333: DJSVGA_TextOption.txo_yalign = GR_ALIGN_TOP;
334: break;
335: }
336: }
337: return TRUE;
338: }
339:
340: TERM_PUBLIC int DJSVGA_set_font(fontname)
341: char *fontname;
342: {
343: char *cp;
344: GrFont *font;
345:
346: safe_strncpy(DJSVGA_fontname, fontname, sizeof(DJSVGA_fontname));
347: cp = strstr(DJSVGA_fontname, ",");
348: if (cp != NULL)
349: *cp = NUL;
350: font = GrLoadFont(DJSVGA_fontname);
351: /*HBB: if no font found, do *not* report success! */
352: if (font != NULL) {
353: GrUnloadFont(DJSVGA_TextOption.txo_font);
354: DJSVGA_TextOption.txo_font = font;
355: return TRUE;
356: } else {
357: graph_error("Font not found");
358: return FALSE;
359: }
360: }
361:
362: TERM_PUBLIC void DJSVGA_put_text(x, y, str)
363: unsigned int x, y;
364: char *str;
365: {
366: /* HBB: why isn't font!=NULL ensured elsewhere? Testing it at
367: * this point doesn't really make much sense (we're in graphics
368: * mode, so we can't even print out a useful error message!) */
369: /*if (DJSVGA_TextOption.txo_font != NULL) */
370: GrDrawString(str, strlen(str), x, dj_ylast - y, &DJSVGA_TextOption);
371: }
372:
373: TERM_PUBLIC void DJSVGA_suspend()
374: {
375: DJSVGA_context = GrCreateContext(GrSizeX(), GrSizeY(), 0, 0);
376: GrBitBltNC(DJSVGA_context, 0, 0, 0, 0, 0, GrMaxX(), GrMaxY(), GrWRITE);
377: DJSVGA_text();
378: }
379:
380: TERM_PUBLIC void DJSVGA_resume()
381: {
382: DJSVGA_graphics();
383: GrBitBltNC(0, 0, 0, DJSVGA_context, 0, 0, GrMaxX(), GrMaxY(), GrWRITE);
384: GrDestroyContext(DJSVGA_context);
385: }
386:
387: TERM_PUBLIC void DJSVGA_fillbox(style, left, bottom, width, height)
388: int style;
389: unsigned int left, bottom, width, height;
390: {
391: if (style >= 13)
392: style %= 13;
393: /* HBB: prize question: should it be 'width-1' instead? */
394: /* HBB: fill with GRX Color '0', which *should* be black : */
395: GrFilledBox(left, dj_ylast - bottom, left + width, dj_ylast - bottom - height, 0);
396: }
397:
398: TERM_PUBLIC void DJSVGA_linewidth(double linewidth)
399: {
400: #ifdef GRX21
401: dj_linewidth = linewidth;
402: #endif
403: }
404:
405: #endif /* TERM_BODY */
406:
407: #ifdef TERM_TABLE
408:
409: /* HBB: I think \" is more readable than \042. BTW: why is this
410: * option 'documented' here, but not in the Help node? */
411: TERM_TABLE_START(djsvga_driver)
412: "svga", "IBM PC/Clone with Super VGA graphics board [\"fontname\"]",
413: DJSVGA_XMAX, DJSVGA_YMAX, DJSVGA_VCHAR, DJSVGA_HCHAR,
414: DJSVGA_VTIC, DJSVGA_HTIC,
415: DJSVGA_options,
416: DJSVGA_init, DJSVGA_reset, DJSVGA_text,
417: null_scale, DJSVGA_graphics, DJSVGA_move, DJSVGA_vector,
418: DJSVGA_linetype, DJSVGA_put_text,
419: DJSVGA_angle, DJSVGA_justify_text,
420: do_point, do_arrow, DJSVGA_set_font,
421: 0, /* no pointsize() */
422: TERM_CAN_MULTIPLOT,
423: DJSVGA_suspend, DJSVGA_resume,
424: DJSVGA_fillbox, DJSVGA_linewidth
425: TERM_TABLE_END(djsvga_driver)
426:
427: #undef LAST_TERM
428: #define LAST_TERM djsvga_driver
429:
430: #endif /* TERM_TABLE */
431: #endif /* TERM_PROTO_ONLY */
432:
433: /*
434: * HBB: I think this documentation should be at least a *bit* longer
435: * (E.g., the "fontname" parameter is claimed to be non-existent!)
436: */
437: /* RCC: Not any more...
438: * If you have other ideas about what could be in the help section,
439: * please let me know (rccrawford@lanl.gov) --- particularly info
440: * about what fonts are permitted, if there is such a list.
441: */
442: #ifdef TERM_HELP
443: START_HELP(svga)
444: "1 svga",
445: "?commands set terminal svga",
446: "?set terminal svga",
447: "?set term svga",
448: "?terminal svga",
449: "?term svga",
450: "?svga",
451: " The `svga` terminal driver supports PCs with SVGA graphics. It can only be",
452: " be used if it is compiled with DJGPP. Its only option is the font.",
453: "",
454: " Syntax:",
455: " set terminal svga {\"<fontname>\"}"
456: END_HELP(svga)
457: #endif /* TERM_HELP */
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