4 * accept dvi function calls and translate to X
8 #include <X11/IntrinsicP.h>
9 #include <X11/StringDefs.h>
14 /* math.h on a Sequent doesn't define M_PI, apparently */
16 #define M_PI 3.14159265358979323846
21 #define DeviceToX(dw, n) ((int)((n) * (dw)->dvi.scale_factor + .5))
22 #define XPos(dw) (DeviceToX((dw), (dw)->dvi.state->x - \
23 (dw)->dvi.text_device_width) + (dw)->dvi.text_x_width)
24 #define YPos(dw) (DeviceToX((dw), (dw)->dvi.state->y))
26 static int FakeCharacter(DviWidget, char *, int);
29 extern int MaxFontPosition(DviWidget);
32 HorizontalMove(DviWidget dw, int delta)
34 dw->dvi.state->x += delta;
38 HorizontalGoto(DviWidget dw, int NewPosition)
40 dw->dvi.state->x = NewPosition;
44 VerticalMove(DviWidget dw, int delta)
46 dw->dvi.state->y += delta;
50 VerticalGoto(DviWidget dw, int NewPosition)
52 dw->dvi.state->y = NewPosition;
56 AdjustCacheDeltas (DviWidget dw)
63 extra = DeviceToX(dw, dw->dvi.text_device_width)
64 - dw->dvi.text_x_width;
67 for (i = 0; i <= dw->dvi.cache.index; i++)
68 if (dw->dvi.cache.adjustable[i])
70 dw->dvi.text_x_width += extra;
73 for (i = 0; i <= dw->dvi.cache.index; i++)
74 if (dw->dvi.cache.adjustable[i]) {
79 deltap = &dw->dvi.cache.cache[i].delta;
81 if (*deltap > 0 && x + *deltap < MIN_DELTA) {
82 x = MIN_DELTA - *deltap;
92 dw->dvi.cache.adjustable[i] = 0;
97 FlushCharCache (DviWidget dw)
99 if (dw->dvi.cache.char_index != 0) {
100 AdjustCacheDeltas (dw);
101 XDrawText (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
102 dw->dvi.cache.start_x, dw->dvi.cache.start_y,
103 dw->dvi.cache.cache, dw->dvi.cache.index + 1);
105 dw->dvi.cache.index = 0;
106 dw->dvi.cache.max = DVI_TEXT_CACHE_SIZE;
108 if (dw->dvi.noPolyText)
109 dw->dvi.cache.max = 1;
111 dw->dvi.cache.char_index = 0;
112 dw->dvi.cache.cache[0].nchars = 0;
113 dw->dvi.cache.start_x = dw->dvi.cache.x = XPos (dw);
114 dw->dvi.cache.start_y = dw->dvi.cache.y = YPos (dw);
118 Newline (DviWidget dw)
121 dw->dvi.text_x_width = dw->dvi.text_device_width = 0;
122 dw->dvi.word_flag = 0;
128 dw->dvi.word_flag = 1;
131 #define charWidth(fi,c) (\
133 (fi)->per_char[(c) - (fi)->min_char_or_byte2].width\
135 (fi)->max_bounds.width\
140 int charExists (XFontStruct *fi, int c)
144 /* `c' is always >= 0 */
145 if (fi->per_char == NULL
146 || (unsigned int)c < fi->min_char_or_byte2
147 || (unsigned int)c > fi->max_char_or_byte2)
149 p = fi->per_char + (c - fi->min_char_or_byte2);
150 return (p->lbearing != 0 || p->rbearing != 0 || p->width != 0
151 || p->ascent != 0 || p->descent != 0 || p->attributes != 0);
154 /* `wid' is in device units */
156 DoCharacter (DviWidget dw, int c, int wid)
158 register XFontStruct *font;
159 register XTextItem *text;
166 * quick and dirty extents calculation:
168 if (!(y + 24 >= dw->dvi.extents.y1
169 && y - 24 <= dw->dvi.extents.y2
171 && x + 24 >= dw->dvi.extents.x1
172 && x - 24 <= dw->dvi.extents.x2
177 if (y != dw->dvi.cache.y
178 || dw->dvi.cache.char_index >= DVI_CHAR_CACHE_SIZE) {
181 dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
184 * load a new font, if the current block is not empty,
187 if (dw->dvi.cache.font_size != dw->dvi.state->font_size ||
188 dw->dvi.cache.font_number != dw->dvi.state->font_number)
192 dw->dvi.cache.font_size = dw->dvi.state->font_size;
193 dw->dvi.cache.font_number = dw->dvi.state->font_number;
194 dw->dvi.cache.font = QueryFont (dw,
195 dw->dvi.cache.font_number,
196 dw->dvi.cache.font_size);
197 if (dw->dvi.cache.cache[dw->dvi.cache.index].nchars != 0) {
198 ++dw->dvi.cache.index;
199 if (dw->dvi.cache.index >= dw->dvi.cache.max)
201 dw->dvi.cache.cache[dw->dvi.cache.index].nchars = 0;
202 dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
205 if (x != dw->dvi.cache.x || dw->dvi.word_flag) {
206 if (dw->dvi.cache.cache[dw->dvi.cache.index].nchars != 0) {
207 ++dw->dvi.cache.index;
208 if (dw->dvi.cache.index >= dw->dvi.cache.max)
210 dw->dvi.cache.cache[dw->dvi.cache.index].nchars = 0;
211 dw->dvi.cache.adjustable[dw->dvi.cache.index] = 0;
213 dw->dvi.cache.adjustable[dw->dvi.cache.index]
215 dw->dvi.word_flag = 0;
217 font = dw->dvi.cache.font;
218 text = &dw->dvi.cache.cache[dw->dvi.cache.index];
219 if (text->nchars == 0) {
220 text->chars = &dw->dvi.cache.char_cache[dw->dvi.cache.char_index];
221 text->delta = x - dw->dvi.cache.x;
222 if (font != dw->dvi.font) {
223 text->font = font->fid;
227 dw->dvi.cache.x += text->delta;
229 if (charExists(font, c)) {
231 dw->dvi.cache.char_cache[dw->dvi.cache.char_index++] = (char) c;
233 w = charWidth(font, c);
234 dw->dvi.cache.x += w;
236 dw->dvi.text_x_width += w;
237 dw->dvi.text_device_width += wid;
243 int FindCharWidth (DviWidget dw, char *buf, int *widp)
248 if (dw->dvi.device_font == 0
249 || dw->dvi.state->font_number != dw->dvi.device_font_number) {
250 dw->dvi.device_font_number = dw->dvi.state->font_number;
252 = QueryDeviceFont (dw, dw->dvi.device_font_number);
254 if (dw->dvi.device_font
255 && device_char_width (dw->dvi.device_font,
256 dw->dvi.state->font_size, buf, widp))
259 maxpos = MaxFontPosition (dw);
260 for (i = 1; i <= maxpos; i++) {
261 DeviceFont *f = QueryDeviceFont (dw, i);
262 if (f && device_font_special (f)
263 && device_char_width (f, dw->dvi.state->font_size,
265 dw->dvi.state->font_number = i;
272 /* Return the width of the character in device units. */
274 int PutCharacter (DviWidget dw, char *buf)
281 if (!dw->dvi.display_enable)
282 return 0; /* The width doesn't matter in this case. */
283 prevFont = dw->dvi.state->font_number;
284 if (!FindCharWidth (dw, buf, &wid))
286 map = QueryFontMap (dw, dw->dvi.state->font_number);
288 c = DviCharIndex (map, buf);
290 DoCharacter (dw, c, wid);
292 (void) FakeCharacter (dw, buf, wid);
293 dw->dvi.state->font_number = prevFont;
297 /* Return 1 if we can fake it; 0 otherwise. */
300 int FakeCharacter (DviWidget dw, char *buf, int wid)
304 const char *chars = 0;
306 if (buf[0] == '\0' || buf[1] == '\0' || buf[2] != '\0')
308 #define pack2(c1, c2) (((c1) << 8) | (c2))
310 switch (pack2(buf[0], buf[1])) {
311 case pack2('f', 'i'):
314 case pack2('f', 'l'):
317 case pack2('f', 'f'):
320 case pack2('F', 'i'):
323 case pack2('F', 'l'):
329 oldx = dw->dvi.state->x;
330 oldw = dw->dvi.text_device_width;
332 for (; *chars; chars++) {
334 dw->dvi.state->x += PutCharacter (dw, ch);
336 dw->dvi.state->x = oldx;
337 dw->dvi.text_device_width = oldw + wid;
342 PutNumberedCharacter (DviWidget dw, int c)
348 if (!dw->dvi.display_enable)
351 if (dw->dvi.device_font == 0
352 || dw->dvi.state->font_number != dw->dvi.device_font_number) {
353 dw->dvi.device_font_number = dw->dvi.state->font_number;
355 = QueryDeviceFont (dw, dw->dvi.device_font_number);
358 if (dw->dvi.device_font == 0
359 || !device_code_width (dw->dvi.device_font,
360 dw->dvi.state->font_size, c, &wid))
362 if (dw->dvi.native) {
363 DoCharacter (dw, c, wid);
366 map = QueryFontMap (dw, dw->dvi.state->font_number);
369 for (name = device_name_for_code (dw->dvi.device_font, c);
371 name = device_name_for_code ((DeviceFont *)0, c)) {
372 int code = DviCharIndex (map, name);
374 DoCharacter (dw, code, wid);
377 if (FakeCharacter (dw, name, wid))
383 ClearPage (DviWidget dw)
385 XClearWindow (XtDisplay (dw), XtWindow (dw));
391 int desired_line_width;
393 if (dw->dvi.line_thickness < 0)
394 desired_line_width = (int)(((double)dw->dvi.device_resolution
395 * dw->dvi.state->font_size)
396 / (10.0*72.0*dw->dvi.sizescale));
398 desired_line_width = dw->dvi.line_thickness;
400 if (desired_line_width != dw->dvi.line_width) {
402 values.line_width = DeviceToX(dw, desired_line_width);
403 if (values.line_width == 0)
404 values.line_width = 1;
405 XChangeGC(XtDisplay (dw), dw->dvi.normal_GC,
406 GCLineWidth, &values);
407 dw->dvi.line_width = desired_line_width;
412 setFillGC (DviWidget dw)
415 unsigned long mask = GCFillStyle | GCForeground;
417 fill_type = (dw->dvi.fill * 10) / (DVI_FILL_MAX + 1);
418 if (dw->dvi.fill_type != fill_type) {
420 if (fill_type <= 0) {
421 values.foreground = dw->dvi.background;
422 values.fill_style = FillSolid;
423 } else if (fill_type >= 9) {
424 values.foreground = dw->dvi.foreground;
425 values.fill_style = FillSolid;
427 values.foreground = dw->dvi.foreground;
428 values.fill_style = FillOpaqueStippled;
429 values.stipple = dw->dvi.gray[fill_type - 1];
432 XChangeGC(XtDisplay (dw), dw->dvi.fill_GC, mask, &values);
433 dw->dvi.fill_type = fill_type;
438 DrawLine (DviWidget dw, int x, int y)
442 AdjustCacheDeltas (dw);
446 XDrawLine (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
448 xp + DeviceToX (dw, x), yp + DeviceToX (dw, y));
452 DrawCircle (DviWidget dw, int diam)
456 AdjustCacheDeltas (dw);
458 d = DeviceToX (dw, diam);
459 XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
460 XPos (dw), YPos (dw) - d/2,
465 DrawFilledCircle (DviWidget dw, int diam)
469 AdjustCacheDeltas (dw);
471 d = DeviceToX (dw, diam);
472 XFillArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
473 XPos (dw), YPos (dw) - d/2,
475 XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
476 XPos (dw), YPos (dw) - d/2,
481 DrawEllipse (DviWidget dw, int a, int b)
483 AdjustCacheDeltas (dw);
485 XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
486 XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
487 DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
491 DrawFilledEllipse (DviWidget dw, int a, int b)
493 AdjustCacheDeltas (dw);
495 XFillArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
496 XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
497 DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
498 XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
499 XPos (dw), YPos (dw) - DeviceToX (dw, b/2),
500 DeviceToX (dw, a), DeviceToX (dw, b), 0, 64*360);
504 DrawArc (DviWidget dw, int x_0, int y_0, int x_1, int y_1)
507 int rad = (int)((sqrt ((double)x_0*x_0 + (double)y_0*y_0)
508 + sqrt ((double)x_1*x_1 + (double)y_1*y_1)
510 if ((x_0 == 0 && y_0 == 0) || (x_1 == 0 && y_1 == 0))
512 angle1 = (int)(atan2 ((double)y_0, (double)-x_0)*180.0*64.0/M_PI);
513 angle2 = (int)(atan2 ((double)-y_1, (double)x_1)*180.0*64.0/M_PI);
519 AdjustCacheDeltas (dw);
522 rad = DeviceToX (dw, rad);
523 XDrawArc (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
524 XPos (dw) + DeviceToX (dw, x_0) - rad,
525 YPos (dw) + DeviceToX (dw, y_0) - rad,
526 rad*2, rad*2, angle1, angle2);
530 DrawPolygon (DviWidget dw, int *v, int n)
538 AdjustCacheDeltas (dw);
540 p = (XPoint *)XtMalloc((n + 2)*sizeof(XPoint));
545 for (i = 0; i < n; i++) {
547 p[i + 1].x = DeviceToX (dw, dx) + p[0].x;
549 p[i + 1].y = DeviceToX (dw, dy) + p[0].y;
553 XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
554 p, n + 2, CoordModeOrigin);
559 DrawFilledPolygon (DviWidget dw, int *v, int n)
569 AdjustCacheDeltas (dw);
571 p = (XPoint *)XtMalloc((n + 2)*sizeof(XPoint));
572 p[0].x = p[n+1].x = XPos (dw);
573 p[0].y = p[n+1].y = YPos (dw);
576 for (i = 0; i < n; i++) {
578 p[i + 1].x = DeviceToX (dw, dx) + p[0].x;
580 p[i + 1].y = DeviceToX (dw, dy) + p[0].y;
582 XFillPolygon (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
583 p, n + 1, Complex, CoordModeOrigin);
584 XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.fill_GC,
585 p, n + 2, CoordModeOrigin);
589 #define POINTS_MAX 10000
592 appendPoint(XPoint *points, int *pointi, int x, int y)
594 if (*pointi < POINTS_MAX) {
595 points[*pointi].x = x;
596 points[*pointi].y = y;
604 flattenCurve(XPoint *points, int *pointi,
605 int x_2, int y_2, int x_3, int y_3, int x_4, int y_4)
607 int x_1, y_1, dx, dy, n1, n2, n;
609 x_1 = points[*pointi - 1].x;
610 y_1 = points[*pointi - 1].y;
615 n1 = dy*(x_2 - x_1) - dx*(y_2 - y_1);
616 n2 = dy*(x_3 - x_1) - dx*(y_3 - y_1);
621 n = n1 > n2 ? n1 : n2;
623 if (n*n / (dy*dy + dx*dx) <= FLATNESS*FLATNESS)
624 appendPoint (points, pointi, x_4, y_4);
626 flattenCurve (points, pointi,
629 (x_1 + x_2*2 + x_3)/4,
630 (y_1 + y_2*2 + y_3)/4,
631 (x_1 + 3*x_2 + 3*x_3 + x_4)/8,
632 (y_1 + 3*y_2 + 3*y_3 + y_4)/8);
633 flattenCurve (points, pointi,
634 (x_2 + x_3*2 + x_4)/4,
635 (y_2 + y_3*2 + y_4)/4,
644 DrawSpline (DviWidget dw, int *v, int n)
650 XPoint points[POINTS_MAX];
652 if (n == 0 || (n & 1) != 0)
654 AdjustCacheDeltas (dw);
662 tx = sx + DeviceToX (dw, dx);
663 ty = sy + DeviceToX (dw, dy);
667 appendPoint (points, &pointi, sx, sy);
668 appendPoint (points, &pointi, (sx + tx)/2, (sy + ty)/2);
670 for (i = 2; i < n; i += 2) {
671 int ux = ox + DeviceToX (dw, dx += v[i]);
672 int uy = oy + DeviceToX (dw, dy += v[i+1]);
673 flattenCurve (points, &pointi,
674 (sx + tx*5)/6, (sy + ty*5)/6,
675 (tx*5 + ux)/6, (ty*5 + uy)/6,
676 (tx + ux)/2, (ty + uy)/2);
683 appendPoint (points, &pointi, tx, ty);
685 XDrawLines (XtDisplay (dw), XtWindow (dw), dw->dvi.normal_GC,
686 points, pointi, CoordModeOrigin);
693 c-continued-statement-offset: 8
697 c-tab-always-indent: nil