1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620
|
/*
* Postscript output for xgraph
*
* Rick Spickelmier
* David Harrison
*/
#include "copyright.h"
#include <stdio.h>
#include "xgraph.h"
/*
* Basic scaling parameters
*/
#define VDPI 1200.0
#define LDIM 11.0
#define SDIM 8.5
#define MICRONS_PER_INCH 2.54E+04
#define POINTS_PER_INCH 72.0
#define INCHES_PER_POINT 1.0/72.0
/*
* Aesthetic parameters (inches)
*/
#define PS_BDR_PAD 0.075
#define PS_AXIS_PAD 0.1
#define PS_LEG_PAD 0.025
#define PS_TICK_LEN 0.125
#define BASE_DASH (1.0/48.0)
#define BASE_WIDTH (1.0/8.0)
#define PS_AXIS_WBASE 1
#define PS_ZERO_WBASE 4
#define PS_DATA_WBASE 7
#define PS_PIXEL 4
#define PS_DOT 12
#define PS_MARK 12
/*
* Other constants
*/
#define FONT_WIDTH_EST 0.55
#define PS_MAX_SEGS 1000
#define PS_NO_TSTYLE -1
#define PS_NO_DSTYLE -1
#define PS_NO_WIDTH -1
#define PS_NO_LSTYLE -1
#define PS_NO_COLOR -1
/*
* Working macros
*/
#define OUT (void) fprintf
#define PS(str) OUT(psFile, str)
#define PSU(str) OUT(ui->psFile, str)
#define IY(val) (ui->height_devs - val)
#define TEXTCOLOR 0
#define MAXCOLOR 8 /* Number of gray scales supported */
/*
* Globals
*/
static double PS_scale; /* devs/micron */
/*
* Externals and forwards
*/
static void psScale(), psFonts(), psMarks(), psText(), psSeg(), psDot(), psEnd();
/*
* Local structures
*/
struct userInfo {
FILE *psFile;
int currentTextStyle;
int currentDashStyle;
int currentWidth;
int currentLStyle;
int currentColor;
int baseWidth;
int height_devs;
char *title_family;
double title_size;
char *axis_family;
double axis_size;
int flags;
};
int
rd(dbl)
double dbl;
/* Short and sweet rounding function */
{
if (dbl < 0.0) {
return ((int) (dbl - 0.5));
}
else {
return ((int) (dbl + 0.5));
}
}
/*ARGSUSED*/
int
psInit(psFile, width, height, tf, ts, af, as, flags, outInfo, errmsg)
FILE *psFile; /* Output file */
int width,
height; /* In microns */
char *tf,
*af; /* Title and axis font */
double ts,
as; /* Title and axis size */
int flags; /* Predicate flags */
xgOut *outInfo; /* Returned device info */
char errmsg[ERRBUFSIZE]; /* Returned error message */
/*
* The basic coordinate system is points (roughly 1/72 inch).
* However, most laser printers can do much better than that.
* We invent a coordinate system based on VDPI dots per inch.
* This goes along the long side of the page. The long side
* of the page is LDIM inches in length, the short side
* SDIM inches in length. We we call this unit a `dev'.
* We map `width' and `height' into devs.
*/
{
struct userInfo *ui;
double font_size;
ui = (struct userInfo *) Malloc(sizeof(struct userInfo));
ui->psFile = psFile;
ui->currentTextStyle = PS_NO_TSTYLE;
ui->currentDashStyle = PS_NO_DSTYLE;
ui->currentWidth = PS_NO_WIDTH;
ui->currentLStyle = PS_NO_LSTYLE;
ui->currentColor = PS_NO_COLOR;
ui->title_family = tf;
ui->title_size = ts;
ui->axis_family = af;
ui->axis_size = as;
/* Roughly, one-eighth a point in devs */
ui->baseWidth = rd(VDPI / POINTS_PER_INCH * BASE_WIDTH);
ui->flags = flags;
PS_scale = VDPI / MICRONS_PER_INCH;
outInfo->dev_flags = 0;
outInfo->area_w = rd(((double) width) * PS_scale);
outInfo->area_h = rd(((double) height) * PS_scale);
ui->height_devs = outInfo->area_h;
outInfo->bdr_pad = rd(PS_BDR_PAD * VDPI);
outInfo->axis_pad = rd(PS_AXIS_PAD * VDPI);
outInfo->legend_pad = rd(PS_LEG_PAD * VDPI);
outInfo->tick_len = rd(PS_TICK_LEN * VDPI);
/* Font estimates */
font_size = as * INCHES_PER_POINT * VDPI;
outInfo->axis_height = rd(font_size);
outInfo->axis_width = rd(font_size * FONT_WIDTH_EST);
font_size = ts * INCHES_PER_POINT * VDPI;
outInfo->title_height = rd(font_size);
outInfo->title_width = rd(font_size * FONT_WIDTH_EST);
outInfo->max_segs = PS_MAX_SEGS;
outInfo->xg_text = psText;
outInfo->xg_seg = psSeg;
outInfo->xg_dot = psDot;
outInfo->xg_end = psEnd;
outInfo->user_state = (char *) ui;
/* Postscript file identification */
PS("%%!\n");
/* Definitions */
psScale(psFile, width, height, flags);
psFonts(psFile);
psMarks(psFile);
PS("%%\n%% Main body begins here\n%%\n");
return 1;
}
static void
psHeader(psFile, docu_flag)
FILE *psFile;
int docu_flag;
/*
* Prints out a standard greeting to the Postscript file.
*/
{
PS("%%%%EndComments\n");
PS("%%\n");
PS("%% Xgraph postscript output\n");
PS("%% Rick Spickelmier and David Harrison\n");
PS("%% University of California, Berkeley\n");
if (docu_flag) {
PS("%%\n");
PS("%% Output produced for inclusion in another document.\n");
PS("%% This file will not work properly if sent directly to a printer.\n");
}
PS("%%\n");
}
static void
psScale(psFile, width, height, flags)
FILE *psFile; /* Output stream */
int width; /* Output width */
int height; /* Output height */
int flags; /* Output options */
/*
* This routine figures out how transform the basic postscript
* transformation into one suitable for direct use by
* the drawing primitives. Two variables X-CENTER-PLOT
* and Y-CENTER-PLOT determine whether the plot is centered
* on the page. If `flags' has D_DOCU set, then the plot
* will not be rotated or centered and a bounding box will
* be displayed.
*/
{
double factor;
double pnt_width,
pnt_height;
if (flags & D_DOCU) {
OUT(psFile, "%%%%BoundingBox: %ld %ld %ld %ld\n",
0L, 0L,
(long) (((double) width) /
(MICRONS_PER_INCH * INCHES_PER_POINT) + 0.5),
(long) (((double) height) /
(MICRONS_PER_INCH * INCHES_PER_POINT) + 0.5)
);
psHeader(psFile, 1);
PS("%% Rotation and centering are turned off for inclusion in a document\n");
}
else {
psHeader(psFile, 0);
PS("%% Scaling information\n");
PS("%%\n");
PS("%% Change these if you would like to change the centering\n");
PS("%% of the plot in either dimension\n");
PS("/X-CENTER-PLOT 1 def\n");
PS("/Y-CENTER-PLOT 1 def\n");
PS("%%\n");
/*
* Determine page size
*/
PS("%% Page size computation\n");
PS("clippath pathbbox\n");
PS("/page-height exch def\n");
PS("/page-width exch def\n");
PS("pop pop\n");
/*
* First: rotation. If the width is greater than the short dimension,
* do the rotation.
*/
pnt_width = ((double) width) / MICRONS_PER_INCH * POINTS_PER_INCH;
pnt_height = ((double) height) / MICRONS_PER_INCH * POINTS_PER_INCH;
PS("%% Determine whether rotation is required\n");
OUT(psFile, "%g page-width gt\n", pnt_width);
PS("{ %% Rotation required\n");
PS(" 90 rotate\n");
PS(" 0 page-width neg translate\n");
PS(" %% Handle centering\n");
PS(" Y-CENTER-PLOT 1 eq { %% Center in y\n");
OUT(psFile, " page-height %g sub 2 div\n", pnt_width);
PS(" } { %% Don't center in y\n");
PS(" 0\n");
PS(" } ifelse\n");
PS(" X-CENTER-PLOT 1 eq { %% Center in x\n");
OUT(psFile, " page-width %g sub 2 div\n", pnt_height);
PS(" } { %% Don't center in x\n");
PS(" 0\n");
PS(" } ifelse\n");
PS(" translate\n");
PS("} { %% No rotation - just handle centering\n");
PS(" X-CENTER-PLOT 1 eq { %% Center in x\n");
OUT(psFile, " page-width %g sub 2 div\n", pnt_width);
PS(" } { %% Don't center in x\n");
PS(" 0\n");
PS(" } ifelse\n");
PS(" Y-CENTER-PLOT 1 eq { %% Center in y\n");
OUT(psFile, " page-height %g sub 2 div\n", pnt_height);
PS(" } { %% Don't center in y\n");
PS(" 0\n");
PS(" } ifelse\n");
PS(" translate\n");
PS("} ifelse\n");
}
/*
* Now: scaling. We have points. We want devs.
*/
factor = POINTS_PER_INCH / VDPI;
PS("%% Set the scale\n");
OUT(psFile, "%g %g scale\n", factor, factor);
}
static void
psFonts(psFile)
FILE *psFile; /* Output stream */
/*
* Downloads code for drawing title and axis labels
*/
{
PS("%% Font Handling Functions\n");
PS("%%\n");
PS("%% Function giving y-offset to center of font\n");
PS("%% Assumes font is set and uses numbers to gauge center\n");
PS("%%\n");
PS("/choose-font %% stack: fontsize fontname => ---\n");
PS("{\n");
PS(" findfont \n");
PS(" exch scalefont \n");
PS(" setfont\n");
PS(" newpath\n");
PS(" 0 0 moveto (0) true charpath flattenpath pathbbox\n");
PS(" /top exch def pop\n");
PS(" /bottom exch def pop\n");
PS(" bottom top bottom top add 2 div\n");
PS(" /center-font-val exch def \n");
PS(" /upper-font-val exch def \n");
PS(" /lower-font-val exch def\n");
PS("} def\n");
PS("%%\n");
PS("%% Justfication offset routines\n");
PS("%%\n");
PS("/center-x-just %% stack: (string) x y => (string) newx y\n");
PS("{\n");
PS(" exch 2 index stringwidth pop 2 div sub exch\n");
PS("} def\n");
PS("%%\n");
PS("/left-x-just %% stack: (string) x y => (string) newx y\n");
PS("{ \n");
PS("} def\n");
PS("%%\n");
PS("/right-x-just %% stack: (string) x y => (string) newx y\n");
PS("{\n");
PS(" exch 2 index stringwidth pop sub exch\n");
PS("} def\n");
PS("%%\n");
PS("/center-y-just %% stack: (string) x y => (string) x newy\n");
PS("{\n");
PS(" center-font-val sub\n");
PS("} def\n");
PS("%%\n");
PS("/lower-y-just %% stack: (string) x y => (string) x newy\n");
PS("{\n");
PS(" lower-font-val sub\n");
PS("} def\n");
PS("%%\n");
PS("/upper-y-just %% stack: (string) x y => (string) x newy\n");
PS("{\n");
PS(" upper-font-val sub\n");
PS("} def\n");
PS("%%\n");
PS("%% Shows a string on the page subject to justification\n");
PS("%% \n");
PS("/just-string %% stack: (string) x y just => ---\n");
PS("{\n");
PS(" dup 0 eq { pop center-x-just center-y-just } if\n");
PS(" dup 1 eq { pop left-x-just center-y-just } if\n");
PS(" dup 2 eq { pop left-x-just upper-y-just } if\n");
PS(" dup 3 eq { pop center-x-just upper-y-just } if\n");
PS(" dup 4 eq { pop right-x-just upper-y-just } if\n");
PS(" dup 5 eq { pop right-x-just center-y-just } if\n");
PS(" dup 6 eq { pop right-x-just lower-y-just } if\n");
PS(" dup 7 eq { pop center-x-just lower-y-just } if\n");
PS(" dup 8 eq { pop left-x-just lower-y-just } if\n");
PS(" moveto show\n");
PS("} def\n");
PS("%%\n");
}
static void
psMarks(psFile)
FILE *psFile;
/*
* Writes out marker definitions
*/
{
PS("%% Marker definitions\n");
PS("/mark0 {/size exch def /y exch def /x exch def\n");
PS("newpath x size sub y size sub moveto\n");
PS("size size add 0 rlineto 0 size size add rlineto\n");
PS("0 size size add sub 0 rlineto closepath fill} def\n");
PS("/mark1 {/size exch def /y exch def /x exch def\n");
PS("newpath x size sub y size sub moveto\n");
PS("size size add 0 rlineto 0 size size add rlineto\n");
PS("0 size size add sub 0 rlineto closepath stroke} def\n");
PS("/mark2 {/size exch def /y exch def /x exch def\n");
PS("newpath x y moveto x y size 0 360 arc stroke} def\n");
PS("/mark3 {/size exch def /y exch def /x exch def\n");
PS("newpath x size sub y size sub moveto x size add y size add lineto\n");
PS("x size sub y size add moveto x size add y size sub lineto stroke} def\n");
PS("/mark4 {/size exch def /y exch def /x exch def\n");
PS("newpath x size sub y moveto x y size add lineto\n");
PS("x size add y lineto x y size sub lineto\n");
PS("closepath stroke} def\n");
PS("/mark5 {/size exch def /y exch def /x exch def\n");
PS("x y size mark1\n");
PS("newpath x size sub y moveto size size add 0 rlineto stroke} def\n");
PS("/mark6 {/size exch def /y exch def /x exch def\n");
PS("newpath x y moveto x y size 0 360 arc fill} def\n");
PS("/mark7 {/size exch def /y exch def /x exch def\n");
PS("newpath x y moveto x size sub y size sub lineto\n");
PS("x size add y size sub lineto closepath fill\n");
PS("newpath x y moveto x size add y size add lineto\n");
PS("x size sub y size add lineto closepath fill} def\n");
}
static void
psText(state, x, y, text, just, style)
char *state; /* Really (struct userInfo *) */
int x,
y; /* Text position (devs) */
char *text; /* Text itself */
int just; /* Justification */
int style; /* Style */
/*
* Draws text at the given location with the given justification
* and style.
*/
{
struct userInfo *ui = (struct userInfo *) state;
if (TEXTCOLOR != ui->currentColor) {
OUT(ui->psFile, "%g setgray\n", (double) TEXTCOLOR / 8);
ui->currentColor = TEXTCOLOR;
}
if (style != ui->currentTextStyle) {
switch (style) {
case T_AXIS:
OUT(ui->psFile, "%g /%s choose-font\n",
ui->axis_size * INCHES_PER_POINT * VDPI, ui->axis_family);
break;
case T_TITLE:
OUT(ui->psFile, "%g /%s choose-font\n",
ui->title_size * INCHES_PER_POINT * VDPI, ui->title_family);
break;
}
ui->currentTextStyle = style;
}
OUT(ui->psFile, "(%s) %d %d %d just-string\n", text, x, IY(y), just);
}
/*ARGSUSED*/
static void
psSeg(state, ns, seglist, width, style, lappr, color)
char *state; /* Really (struct userInfo *) */
int ns; /* Number of segments */
XSegment *seglist; /* X array of segments */
int width; /* Width of lines (devcoords) */
int style; /* L_AXIS, L_ZERO, L_VAR */
int lappr; /* Zero to seven */
int color; /* Zero to seven */
/*
* Draws a number of line segments. Grid lines are drawn using
* light lines. Variable lines (L_VAR) are drawn wider. This
* version ignores the color argument.
*/
{
struct userInfo *ui = (struct userInfo *) state;
int newwidth = 0,
i;
if ((style != ui->currentLStyle) || (width != ui->currentWidth)) {
switch (style) {
case L_AXIS:
newwidth = PS_AXIS_WBASE * ui->baseWidth;
PSU("[] 0 setdash\n");
break;
case L_ZERO:
newwidth = PS_ZERO_WBASE * ui->baseWidth;
PSU("[] 0 setdash\n");
break;
case L_VAR:
newwidth = PS_DATA_WBASE * ui->baseWidth;
break;
}
ui->currentWidth = MAX(newwidth, width);
ui->currentLStyle = style;
OUT(ui->psFile, "%d setlinewidth\n", ui->currentWidth);
}
if (width > 4) {
if (color > MAXCOLOR)
color -= MAXCOLOR;
else
lappr = 0;
}
else
color = TEXTCOLOR;
if ((lappr != ui->currentDashStyle) && (style == L_VAR)) {
if (lappr == 0) {
PSU("[] 0 setdash\n");
}
else {
OUT(ui->psFile, "[%g] 0 setdash\n",
((double) lappr) * BASE_DASH * VDPI);
}
ui->currentDashStyle = lappr;
}
if ((color != ui->currentColor) && (style == L_VAR)) {
OUT(ui->psFile, "%g setgray\n", (double) color / MAXCOLOR);
ui->currentColor = color;
}
PSU("newpath\n");
OUT(ui->psFile, " %d %d moveto\n", seglist[0].x1, IY(seglist[0].y1));
OUT(ui->psFile, " %d %d lineto\n", seglist[0].x2, IY(seglist[0].y2));
for (i = 1; i < ns; i++) {
if ((seglist[i].x1 != seglist[i - 1].x2) ||
(seglist[i].y1 != seglist[i - 1].y2)) {
OUT(ui->psFile, " %d %d moveto\n", seglist[i].x1, IY(seglist[i].y1));
}
OUT(ui->psFile, " %d %d lineto\n", seglist[i].x2, IY(seglist[i].y2));
}
PSU("stroke\n");
}
/*ARGSUSED*/
static void
psDot(state, x, y, style, type, color)
char *state; /* state information */
int x,
y; /* coord of dot */
int style; /* type of dot */
int type; /* dot style variation */
int color; /* color of dot */
/*
* Prints out a dot at the given location
*/
{
struct userInfo *ui = (struct userInfo *) state;
if (ui->currentDashStyle != PS_NO_DSTYLE) {
OUT(ui->psFile, "[] 0 setdash ");
ui->currentDashStyle = PS_NO_DSTYLE;
}
if (ui->currentWidth != PS_ZERO_WBASE * ui->baseWidth) {
ui->currentWidth = PS_ZERO_WBASE * ui->baseWidth;
OUT(ui->psFile, "%d setlinewidth ", ui->currentWidth);
}
if (color > MAXCOLOR)
color -= MAXCOLOR;
if ((color != ui->currentColor)) {
OUT(ui->psFile, "%g setgray\n", (double) color / MAXCOLOR);
ui->currentColor = color;
}
switch (style) {
case P_PIXEL:
OUT(ui->psFile, "newpath %d %d moveto %d %d %d 0 360 arc fill\n",
x, IY(y), x, IY(y), PS_PIXEL * ui->baseWidth);
break;
case P_DOT:
OUT(ui->psFile, "newpath %d %d moveto %d %d %d 0 360 arc fill\n",
x, IY(y), x, IY(y), PS_DOT * ui->baseWidth);
break;
case P_MARK:
OUT(ui->psFile, "%d %d %d mark%d\n",
x, IY(y), PS_MARK * ui->baseWidth, type);
break;
}
return;
}
static void
psEnd(userState)
char *userState; /* state information */
{
struct userInfo *ui = (struct userInfo *) userState;
if (!(ui->flags & D_DOCU)) {
PSU("showpage\n");
}
PSU("%% End of xgraph output\n");
}
|