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af58ef32 SC |
1 | /* |
2 | * gfio - gui front end for fio - the flexible io tester | |
3 | * | |
4 | * Copyright (C) 2012 Stephen M. Cameron <stephenmcameron@gmail.com> | |
5 | * | |
6 | * The license below covers all files distributed with fio unless otherwise | |
7 | * noted in the file itself. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | #include <string.h> | |
24 | #include <malloc.h> | |
25 | #include <math.h> | |
26 | #include <assert.h> | |
27 | ||
28 | #include <cairo.h> | |
29 | #include <gtk/gtk.h> | |
30 | ||
31 | #include "tickmarks.h" | |
32 | ||
33 | struct xyvalue { | |
34 | double x, y; | |
35 | }; | |
36 | ||
37 | struct graph_value { | |
38 | struct graph_value *next; | |
39 | void *value; | |
40 | }; | |
41 | ||
42 | struct graph_label { | |
43 | char *label; | |
44 | struct graph_value *tail; | |
45 | struct graph_value *values; | |
46 | struct graph_label *next; | |
47 | double r, g, b; | |
48 | int value_count; | |
49 | struct graph *parent; | |
50 | }; | |
51 | ||
52 | struct graph { | |
53 | char *title; | |
54 | char *xtitle; | |
55 | char *ytitle; | |
87d5f276 | 56 | unsigned int xdim, ydim; |
af58ef32 SC |
57 | struct graph_label *labels; |
58 | struct graph_label *tail; | |
59 | int per_label_limit; | |
f3e8440f | 60 | const char *font; |
af58ef32 SC |
61 | }; |
62 | ||
f3e8440f | 63 | struct graph *graph_new(unsigned int xdim, unsigned int ydim, const char *font) |
af58ef32 SC |
64 | { |
65 | struct graph *g; | |
66 | ||
67 | g = calloc(1, sizeof(*g)); | |
68 | g->xdim = xdim; | |
69 | g->ydim = ydim; | |
70 | g->per_label_limit = -1; | |
f3e8440f JA |
71 | g->font = font; |
72 | if (!g->font) | |
73 | g->font = "Sans"; | |
af58ef32 SC |
74 | return g; |
75 | } | |
76 | ||
77 | static int count_labels(struct graph_label *labels) | |
78 | { | |
79 | int count = 0; | |
80 | struct graph_label *i; | |
81 | ||
82 | for (i = labels; i; i = i->next) | |
83 | count++; | |
84 | return count; | |
85 | } | |
86 | ||
87 | static int count_values(struct graph_value *values) | |
88 | { | |
89 | int count = 0; | |
90 | struct graph_value *i; | |
91 | ||
92 | for (i = values; i; i = i->next) | |
93 | count++; | |
94 | return count; | |
95 | } | |
96 | ||
97 | typedef double (*double_comparator)(double a, double b); | |
98 | ||
99 | static double mindouble(double a, double b) | |
100 | { | |
101 | return a < b ? a : b; | |
102 | } | |
103 | ||
104 | static double maxdouble(double a, double b) | |
105 | { | |
106 | return a < b ? b : a; | |
107 | } | |
108 | ||
109 | static double find_double_values(struct graph_value *values, double_comparator cmp) | |
110 | { | |
111 | struct graph_value *i; | |
112 | int first = 1; | |
113 | double answer, tmp; | |
114 | ||
115 | assert(values != NULL); | |
116 | answer = 0.0; /* shut the compiler up, might need to think harder though. */ | |
117 | for (i = values; i; i = i->next) { | |
118 | tmp = *(double *) i->value; | |
119 | if (first) { | |
120 | answer = tmp; | |
121 | first = 0; | |
122 | } else { | |
123 | answer = cmp(answer, tmp); | |
124 | } | |
125 | } | |
126 | return answer; | |
127 | } | |
128 | ||
129 | static double find_double_data(struct graph_label *labels, double_comparator cmp) | |
130 | { | |
131 | struct graph_label *i; | |
132 | int first = 1; | |
133 | double answer, tmp; | |
134 | ||
135 | assert(labels != NULL); | |
136 | answer = 0.0; /* shut the compiler up, might need to think harder though. */ | |
137 | for (i = labels; i; i = i->next) { | |
138 | tmp = find_double_values(i->values, cmp); | |
139 | if (first) { | |
140 | answer = tmp; | |
141 | first = 0; | |
142 | } else { | |
143 | answer = cmp(tmp, answer); | |
144 | } | |
145 | } | |
146 | return answer; | |
147 | } | |
148 | ||
149 | static double find_min_data(struct graph_label *labels) | |
150 | { | |
151 | return find_double_data(labels, mindouble); | |
152 | } | |
153 | ||
154 | static double find_max_data(struct graph_label *labels) | |
155 | { | |
156 | return find_double_data(labels, maxdouble); | |
157 | } | |
158 | ||
159 | static void draw_bars(struct graph *bg, cairo_t *cr, struct graph_label *lb, | |
160 | double label_offset, double bar_width, | |
161 | double mindata, double maxdata) | |
162 | { | |
163 | struct graph_value *i; | |
164 | double x1, y1, x2, y2; | |
165 | int bar_num = 0; | |
166 | double domain, range, v; | |
167 | ||
168 | domain = (maxdata - mindata); | |
169 | range = (double) bg->ydim * 0.80; /* FIXME */ | |
170 | cairo_stroke(cr); | |
171 | for (i = lb->values; i; i = i->next) { | |
172 | ||
173 | x1 = label_offset + (double) bar_num * bar_width + (bar_width * 0.05); | |
174 | x2 = x1 + bar_width * 0.90; | |
175 | y2 = bg->ydim * 0.90; | |
176 | v = *(double *) i->value; | |
177 | y1 = y2 - (((v - mindata) / domain) * range); | |
178 | cairo_move_to(cr, x1, y1); | |
179 | cairo_line_to(cr, x1, y2); | |
180 | cairo_line_to(cr, x2, y2); | |
181 | cairo_line_to(cr, x2, y1); | |
182 | cairo_close_path(cr); | |
183 | cairo_fill(cr); | |
184 | cairo_stroke(cr); | |
185 | bar_num++; | |
186 | } | |
187 | } | |
188 | ||
f3e8440f JA |
189 | static void draw_centered_text(struct graph *g, cairo_t *cr, double x, double y, |
190 | double fontsize, const char *text) | |
af58ef32 SC |
191 | { |
192 | cairo_text_extents_t extents; | |
193 | ||
f3e8440f | 194 | cairo_select_font_face (cr, g->font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); |
af58ef32 SC |
195 | |
196 | cairo_set_font_size(cr, fontsize); | |
197 | cairo_text_extents(cr, text, &extents); | |
198 | x = x - (extents.width / 2 + extents.x_bearing); | |
199 | y = y - (extents.height / 2 + extents.y_bearing); | |
200 | ||
201 | cairo_move_to(cr, x, y); | |
202 | cairo_show_text(cr, text); | |
203 | } | |
204 | ||
f3e8440f JA |
205 | static void draw_vertical_centered_text(struct graph *g, cairo_t *cr, double x, |
206 | double y, double fontsize, | |
207 | const char *text) | |
af58ef32 SC |
208 | { |
209 | double sx, sy; | |
210 | cairo_text_extents_t extents; | |
211 | ||
f3e8440f | 212 | cairo_select_font_face(cr, g->font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL); |
af58ef32 SC |
213 | |
214 | cairo_set_font_size(cr, fontsize); | |
215 | cairo_text_extents(cr, text, &extents); | |
216 | sx = x; | |
217 | sy = y; | |
218 | y = y + (extents.width / 2.0 + extents.x_bearing); | |
219 | x = x - (extents.height / 2.0 + extents.y_bearing); | |
220 | ||
221 | cairo_move_to(cr, x, y); | |
222 | cairo_save(cr); | |
223 | cairo_translate(cr, -sx, -sy); | |
224 | cairo_rotate(cr, -90.0 * M_PI / 180.0); | |
225 | cairo_translate(cr, sx, sy); | |
226 | cairo_show_text(cr, text); | |
227 | cairo_restore(cr); | |
228 | } | |
229 | ||
230 | static void graph_draw_common(struct graph *g, cairo_t *cr, | |
231 | double *x1, double *y1, double *x2, double *y2) | |
232 | { | |
233 | cairo_set_source_rgb(cr, 0, 0, 0); | |
f3e8440f | 234 | cairo_set_line_width (cr, 0.8); |
af58ef32 | 235 | |
af58ef32 SC |
236 | /* for now just set margins at 10% of width. This is not very good. */ |
237 | *x1 = g->xdim / 10.0; | |
f3e8440f | 238 | *x2 = 9.0 * *x1; |
af58ef32 | 239 | *y1 = g->ydim / 10.0; |
f3e8440f | 240 | *y2 = 9.0 * *y1; |
af58ef32 SC |
241 | |
242 | cairo_move_to(cr, *x1, *y1); | |
243 | cairo_line_to(cr, *x1, *y2); | |
244 | cairo_line_to(cr, *x2, *y2); | |
245 | cairo_line_to(cr, *x2, *y1); | |
246 | cairo_line_to(cr, *x1, *y1); | |
247 | cairo_stroke(cr); | |
248 | ||
f3e8440f JA |
249 | draw_centered_text(g, cr, g->xdim / 2, g->ydim / 20, 20.0, g->title); |
250 | draw_centered_text(g, cr, g->xdim / 2, g->ydim * 0.97, 14.0, g->xtitle); | |
251 | draw_vertical_centered_text(g, cr, g->xdim * 0.02, g->ydim / 2, 14.0, g->ytitle); | |
af58ef32 SC |
252 | cairo_stroke(cr); |
253 | } | |
254 | ||
255 | static void graph_draw_x_ticks(struct graph *g, cairo_t *cr, | |
256 | double x1, double y1, double x2, double y2, | |
257 | double minx, double maxx, int nticks) | |
258 | { | |
259 | struct tickmark *tm; | |
260 | double tx; | |
261 | int i; | |
262 | static double dash[] = { 1.0, 2.0 }; | |
263 | ||
264 | nticks = calc_tickmarks(minx, maxx, nticks, &tm); | |
265 | ||
266 | for (i = 0; i < nticks; i++) { | |
267 | tx = (((tm[i].value) - minx) / (maxx - minx)) * (x2 - x1) + x1; | |
268 | if (tx < x1 || tx > x2) | |
269 | continue; | |
270 | ||
271 | /* Draw tick mark */ | |
f3e8440f | 272 | cairo_set_line_width(cr, 0.8); |
af58ef32 SC |
273 | cairo_move_to(cr, tx, y2); |
274 | cairo_line_to(cr, tx, y2 + (y2 - y1) * 0.03); | |
275 | cairo_stroke(cr); | |
276 | ||
277 | /* draw grid lines */ | |
278 | cairo_save(cr); | |
279 | cairo_set_dash(cr, dash, 2, 2.0); | |
280 | cairo_set_line_width(cr, 0.5); | |
281 | cairo_move_to(cr, tx, y1); | |
282 | cairo_line_to(cr, tx, y2); | |
283 | cairo_stroke(cr); | |
284 | cairo_restore(cr); | |
285 | ||
286 | /* draw tickmark label */ | |
f3e8440f | 287 | draw_centered_text(g, cr, tx, y2 * 1.04, 12.0, tm[i].string); |
af58ef32 SC |
288 | cairo_stroke(cr); |
289 | ||
290 | } | |
291 | } | |
292 | ||
293 | static void graph_draw_y_ticks(struct graph *g, cairo_t *cr, | |
294 | double x1, double y1, double x2, double y2, | |
295 | double miny, double maxy, int nticks) | |
296 | { | |
297 | struct tickmark *tm; | |
298 | double ty; | |
299 | int i; | |
300 | static double dash[] = { 2.0, 2.0 }; | |
301 | ||
302 | nticks = calc_tickmarks(miny, maxy, nticks, &tm); | |
303 | ||
304 | for (i = 0; i < nticks; i++) { | |
305 | ty = y2 - (((tm[i].value) - miny) / (maxy - miny)) * (y2 - y1); | |
306 | if (ty < y1 || ty > y2) | |
307 | continue; | |
308 | /* draw tick mark */ | |
309 | cairo_move_to(cr, x1, ty); | |
310 | cairo_line_to(cr, x1 - (x2 - x1) * 0.02, ty); | |
311 | cairo_stroke(cr); | |
312 | ||
313 | /* draw grid lines */ | |
314 | cairo_save(cr); | |
315 | cairo_set_dash(cr, dash, 2, 2.0); | |
316 | cairo_set_line_width(cr, 0.5); | |
317 | cairo_move_to(cr, x1, ty); | |
318 | cairo_line_to(cr, x2, ty); | |
319 | cairo_stroke(cr); | |
320 | cairo_restore(cr); | |
321 | ||
322 | /* draw tickmark label */ | |
f3e8440f | 323 | draw_centered_text(g, cr, x1 - (x2 - x1) * 0.04, ty, 12.0, tm[i].string); |
af58ef32 SC |
324 | cairo_stroke(cr); |
325 | } | |
326 | } | |
327 | ||
328 | void bar_graph_draw(struct graph *bg, cairo_t *cr) | |
329 | { | |
330 | double x1, y1, x2, y2; | |
331 | double space_per_label, bar_width; | |
332 | double label_offset, mindata, maxdata; | |
333 | int i, nlabels; | |
334 | struct graph_label *lb; | |
335 | ||
336 | cairo_save(cr); | |
337 | graph_draw_common(bg, cr, &x1, &y1, &x2, &y2); | |
338 | ||
339 | nlabels = count_labels(bg->labels); | |
340 | space_per_label = (x2 - x1) / (double) nlabels; | |
341 | ||
342 | mindata = find_min_data(bg->labels); | |
343 | maxdata = find_max_data(bg->labels); | |
344 | ||
345 | if (fabs(maxdata - mindata) < 1e-20) { | |
f3e8440f | 346 | draw_centered_text(bg, cr, |
af58ef32 SC |
347 | x1 + (x2 - x1) / 2.0, |
348 | y1 + (y2 - y1) / 2.0, 20.0, "No good data"); | |
349 | return; | |
350 | } | |
351 | ||
352 | graph_draw_y_ticks(bg, cr, x1, y1, x2, y2, mindata, maxdata, 10); | |
353 | ||
354 | i = 0; | |
355 | for (lb = bg->labels; lb; lb = lb->next) { | |
356 | int nvalues; | |
357 | nvalues = count_values(lb->values); | |
358 | bar_width = (space_per_label - space_per_label * 0.2) / (double) nvalues; | |
359 | label_offset = bg->xdim * 0.1 + space_per_label * (double) i + space_per_label * 0.1; | |
360 | draw_bars(bg, cr, lb, label_offset, bar_width, mindata, maxdata); | |
361 | // draw_centered_text(cr, label_offset + (bar_width / 2.0 + bar_width * 0.1), bg->ydim * 0.93, | |
f3e8440f | 362 | draw_centered_text(bg, cr, x1 + space_per_label * (i + 0.5), bg->ydim * 0.93, |
af58ef32 SC |
363 | 12.0, lb->label); |
364 | i++; | |
365 | } | |
366 | cairo_stroke(cr); | |
367 | cairo_restore(cr); | |
368 | } | |
369 | ||
370 | typedef double (*xy_value_extractor)(struct graph_value *v); | |
371 | ||
372 | static double getx(struct graph_value *v) | |
373 | { | |
374 | struct xyvalue *xy = v->value; | |
375 | return xy->x; | |
376 | } | |
377 | ||
378 | static double gety(struct graph_value *v) | |
379 | { | |
380 | struct xyvalue *xy = v->value; | |
381 | return xy->y; | |
382 | } | |
383 | ||
384 | static double find_xy_value(struct graph *g, xy_value_extractor getvalue, double_comparator cmp) | |
385 | { | |
386 | double tmp, answer = 0.0; | |
387 | struct graph_label *i; | |
388 | struct graph_value *j; | |
389 | ||
390 | for (i = g->labels; i; i = i->next) | |
391 | for (j = i->values; j; j = j->next) { | |
392 | tmp = getvalue(j); | |
393 | answer = cmp(tmp, answer); | |
394 | } | |
395 | return answer; | |
396 | } | |
397 | ||
398 | void line_graph_draw(struct graph *g, cairo_t *cr) | |
399 | { | |
400 | double x1, y1, x2, y2; | |
401 | double minx, miny, maxx, maxy; | |
402 | double tx, ty; | |
403 | struct graph_label *i; | |
404 | struct graph_value *j; | |
405 | int first = 1; | |
406 | ||
407 | cairo_save(cr); | |
408 | graph_draw_common(g, cr, &x1, &y1, &x2, &y2); | |
409 | ||
410 | minx = find_xy_value(g, getx, mindouble); | |
411 | maxx = find_xy_value(g, getx, maxdouble); | |
412 | miny = find_xy_value(g, gety, mindouble); | |
413 | maxy = find_xy_value(g, gety, maxdouble); | |
414 | ||
415 | if (fabs(maxx - minx) < 1e-20 || fabs(maxy - miny) < 1e-20) { | |
f3e8440f | 416 | draw_centered_text(g, cr, |
af58ef32 SC |
417 | x1 + (x2 - x1) / 2.0, |
418 | y1 + (y2 - y1) / 2.0, 20.0, "No good Data"); | |
419 | return; | |
420 | } | |
421 | ||
422 | graph_draw_x_ticks(g, cr, x1, y1, x2, y2, minx, maxx, 10); | |
423 | graph_draw_y_ticks(g, cr, x1, y1, x2, y2, miny, maxy, 10); | |
424 | ||
f3e8440f | 425 | cairo_set_line_width(cr, 1.5); |
af58ef32 SC |
426 | for (i = g->labels; i; i = i->next) { |
427 | first = 1; | |
cae08727 SC |
428 | if (i->r < 0) /* invisible data */ |
429 | continue; | |
af58ef32 SC |
430 | cairo_set_source_rgb(cr, i->r, i->g, i->b); |
431 | for (j = i->values; j; j = j->next) { | |
432 | tx = ((getx(j) - minx) / (maxx - minx)) * (x2 - x1) + x1; | |
433 | ty = y2 - ((gety(j) - miny) / (maxy - miny)) * (y2 - y1); | |
434 | if (first) { | |
435 | cairo_move_to(cr, tx, ty); | |
436 | first = 0; | |
437 | } else { | |
438 | cairo_line_to(cr, tx, ty); | |
439 | } | |
440 | } | |
441 | cairo_stroke(cr); | |
442 | } | |
443 | cairo_restore(cr); | |
444 | } | |
445 | ||
446 | static void gfree(void *f) | |
447 | { | |
448 | if (f) | |
449 | free(f); | |
450 | } | |
451 | ||
452 | static void setstring(char **str, const char *value) | |
453 | { | |
454 | gfree(*str); | |
455 | *str = strdup(value); | |
456 | } | |
457 | ||
458 | void graph_title(struct graph *bg, const char *title) | |
459 | { | |
460 | setstring(&bg->title, title); | |
461 | } | |
462 | ||
463 | void graph_x_title(struct graph *bg, const char *title) | |
464 | { | |
465 | setstring(&bg->xtitle, title); | |
466 | } | |
467 | ||
468 | void graph_y_title(struct graph *bg, const char *title) | |
469 | { | |
470 | setstring(&bg->ytitle, title); | |
471 | } | |
472 | ||
473 | static struct graph_label *graph_find_label(struct graph *bg, | |
474 | const char *label) | |
475 | { | |
476 | struct graph_label *i; | |
477 | ||
478 | for (i = bg->labels; i; i = i->next) | |
479 | if (strcmp(label, i->label) == 0) | |
480 | return i; | |
481 | return NULL; | |
482 | } | |
483 | ||
484 | void graph_add_label(struct graph *bg, const char *label) | |
485 | { | |
486 | struct graph_label *i; | |
487 | ||
488 | i = graph_find_label(bg, label); | |
489 | if (i) | |
490 | return; /* already present. */ | |
491 | i = calloc(1, sizeof(*i)); | |
492 | i->parent = bg; | |
493 | setstring(&i->label, label); | |
494 | i->next = NULL; | |
495 | if (!bg->tail) | |
496 | bg->labels = i; | |
497 | else | |
498 | bg->tail->next = i; | |
499 | bg->tail = i; | |
500 | } | |
501 | ||
502 | static void graph_label_add_value(struct graph_label *i, void *value) | |
503 | { | |
504 | struct graph_value *x; | |
505 | ||
506 | x = malloc(sizeof(*x)); | |
507 | x->value = value; | |
508 | x->next = NULL; | |
509 | if (!i->tail) { | |
510 | i->values = x; | |
511 | } else { | |
512 | i->tail->next = x; | |
513 | } | |
514 | i->tail = x; | |
515 | i->value_count++; | |
516 | ||
517 | if (i->parent->per_label_limit != -1 && | |
518 | i->value_count > i->parent->per_label_limit) { | |
519 | x = i->values; | |
520 | i->values = i->values->next; | |
521 | free(x->value); | |
522 | free(x); | |
523 | i->value_count--; | |
524 | } | |
525 | } | |
526 | ||
527 | int graph_add_data(struct graph *bg, const char *label, const double value) | |
528 | { | |
529 | struct graph_label *i; | |
530 | double *d; | |
531 | ||
532 | d = malloc(sizeof(*d)); | |
533 | *d = value; | |
534 | ||
535 | i = graph_find_label(bg, label); | |
536 | if (!i) | |
537 | return -1; | |
538 | graph_label_add_value(i, d); | |
539 | return 0; | |
540 | } | |
541 | ||
542 | int graph_add_xy_data(struct graph *bg, const char *label, | |
543 | const double x, const double y) | |
544 | { | |
545 | struct graph_label *i; | |
546 | struct xyvalue *xy; | |
547 | ||
548 | xy = malloc(sizeof(*xy)); | |
549 | xy->x = x; | |
550 | xy->y = y; | |
551 | ||
552 | i = graph_find_label(bg, label); | |
553 | if (!i) | |
554 | return -1; | |
555 | graph_label_add_value(i, xy); | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static void graph_free_values(struct graph_value *values) | |
560 | { | |
561 | struct graph_value *i, *next; | |
562 | ||
563 | for (i = values; i; i = next) { | |
564 | next = i->next; | |
565 | gfree(i->value); | |
566 | gfree(i); | |
567 | } | |
568 | } | |
569 | ||
570 | static void graph_free_labels(struct graph_label *labels) | |
571 | { | |
572 | struct graph_label *i, *next; | |
573 | ||
574 | for (i = labels; i; i = next) { | |
575 | next = i->next; | |
576 | graph_free_values(i->values); | |
577 | gfree(i); | |
578 | } | |
579 | } | |
580 | ||
581 | void graph_set_color(struct graph *gr, const char *label, | |
582 | double red, double green, double blue) | |
583 | { | |
584 | struct graph_label *i; | |
585 | double r, g, b; | |
586 | ||
cae08727 SC |
587 | if (red < 0.0) { /* invisible color */ |
588 | r = -1.0; | |
589 | g = -1.0; | |
590 | b = -1.0; | |
591 | } else { | |
592 | r = fabs(red); | |
593 | g = fabs(green); | |
594 | b = fabs(blue); | |
595 | ||
596 | if (r > 1.0) | |
597 | r = 1.0; | |
598 | if (g > 1.0) | |
599 | g = 1.0; | |
600 | if (b > 1.0) | |
601 | b =1.0; | |
602 | } | |
af58ef32 SC |
603 | |
604 | for (i = gr->labels; i; i = i->next) | |
605 | if (strcmp(i->label, label) == 0) { | |
606 | i->r = r; | |
607 | i->g = g; | |
608 | i->b = b; | |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
613 | void graph_free(struct graph *bg) | |
614 | { | |
615 | gfree(bg->title); | |
616 | gfree(bg->xtitle); | |
617 | gfree(bg->ytitle); | |
618 | graph_free_labels(bg->labels); | |
619 | } | |
620 | ||
621 | /* For each line in the line graph, up to per_label_limit segments may | |
622 | * be added. After that, adding more data to the end of the line | |
623 | * causes data to drop off of the front of the line. | |
624 | */ | |
625 | void line_graph_set_data_count_limit(struct graph *g, int per_label_limit) | |
626 | { | |
627 | g->per_label_limit = per_label_limit; | |
628 | } | |
629 |