1 /****************************************************************************
2 * RRDtool 1.2.23 Copyright by Tobi Oetiker, 1997-2007
3 ****************************************************************************
4 * rrd__graph.c produce graphs from data in rrdfiles
5 ****************************************************************************/
15 #if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
28 #include "rrd_graph.h"
30 /* some constant definitions */
34 #ifndef RRD_DEFAULT_FONT
35 /* there is special code later to pick Cour.ttf when running on windows */
36 #define RRD_DEFAULT_FONT "DejaVuSansMono-Roman.ttf"
39 text_prop_t text_prop[] = {
40 {8.0, RRD_DEFAULT_FONT}
42 {9.0, RRD_DEFAULT_FONT}
44 {7.0, RRD_DEFAULT_FONT}
46 {8.0, RRD_DEFAULT_FONT}
48 {8.0, RRD_DEFAULT_FONT} /* legend */
52 {0, 0, TMT_SECOND, 30, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
54 {2, 0, TMT_MINUTE, 1, TMT_MINUTE, 5, TMT_MINUTE, 5, 0, "%H:%M"}
56 {5, 0, TMT_MINUTE, 2, TMT_MINUTE, 10, TMT_MINUTE, 10, 0, "%H:%M"}
58 {10, 0, TMT_MINUTE, 5, TMT_MINUTE, 20, TMT_MINUTE, 20, 0, "%H:%M"}
60 {30, 0, TMT_MINUTE, 10, TMT_HOUR, 1, TMT_HOUR, 1, 0, "%H:%M"}
62 {60, 0, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 2, 0, "%H:%M"}
64 {60, 24 * 3600, TMT_MINUTE, 30, TMT_HOUR, 2, TMT_HOUR, 4, 0, "%a %H:%M"}
66 {180, 0, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 6, 0, "%H:%M"}
68 {180, 24 * 3600, TMT_HOUR, 1, TMT_HOUR, 6, TMT_HOUR, 12, 0, "%a %H:%M"}
70 /*{300, 0, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly */
71 {600, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%a"}
73 {1200, 0, TMT_HOUR, 6, TMT_DAY, 1, TMT_DAY, 1, 24 * 3600, "%d"}
75 {1800, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a %d"}
77 {2400, 0, TMT_HOUR, 12, TMT_DAY, 1, TMT_DAY, 2, 24 * 3600, "%a"}
79 {3600, 0, TMT_DAY, 1, TMT_WEEK, 1, TMT_WEEK, 1, 7 * 24 * 3600, "Week %V"}
81 {3 * 3600, 0, TMT_WEEK, 1, TMT_MONTH, 1, TMT_WEEK, 2, 7 * 24 * 3600,
84 {6 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 1, TMT_MONTH, 1, 30 * 24 * 3600,
87 {48 * 3600, 0, TMT_MONTH, 1, TMT_MONTH, 3, TMT_MONTH, 3, 30 * 24 * 3600,
90 {315360, 0, TMT_MONTH, 3, TMT_YEAR, 1, TMT_YEAR, 1, 365 * 24 * 3600, "%Y"}
92 {10 * 24 * 3600, 0, TMT_YEAR, 1, TMT_YEAR, 1, TMT_YEAR, 1,
93 365 * 24 * 3600, "%y"}
95 {-1, 0, TMT_MONTH, 0, TMT_MONTH, 0, TMT_MONTH, 0, 0, ""}
98 /* sensible y label intervals ...*/
122 {20.0, {1, 5, 10, 20}
128 {100.0, {1, 2, 5, 10}
131 {200.0, {1, 5, 10, 20}
134 {500.0, {1, 2, 4, 10}
142 gfx_color_t graph_col[] = /* default colors */
144 {1.00, 1.00, 1.00, 1.00}, /* canvas */
145 {0.95, 0.95, 0.95, 1.00}, /* background */
146 {0.81, 0.81, 0.81, 1.00}, /* shade A */
147 {0.62, 0.62, 0.62, 1.00}, /* shade B */
148 {0.56, 0.56, 0.56, 0.75}, /* grid */
149 {0.87, 0.31, 0.31, 0.60}, /* major grid */
150 {0.00, 0.00, 0.00, 1.00}, /* font */
151 {0.50, 0.12, 0.12, 1.00}, /* arrow */
152 {0.12, 0.12, 0.12, 1.00}, /* axis */
153 {0.00, 0.00, 0.00, 1.00} /* frame */
160 # define DPRINT(x) (void)(printf x, printf("\n"))
166 /* initialize with xtr(im,0); */
174 pixie = (double) im->xsize / (double) (im->end - im->start);
177 return (int) ((double) im->xorigin + pixie * (mytime - im->start));
180 /* translate data values into y coordinates */
189 if (!im->logarithmic)
190 pixie = (double) im->ysize / (im->maxval - im->minval);
193 (double) im->ysize / (log10(im->maxval) - log10(im->minval));
195 } else if (!im->logarithmic) {
196 yval = im->yorigin - pixie * (value - im->minval);
198 if (value < im->minval) {
201 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
204 /* make sure we don't return anything too unreasonable. GD lib can
205 get terribly slow when drawing lines outside its scope. This is
206 especially problematic in connection with the rigid option */
208 /* keep yval as-is */
209 } else if (yval > im->yorigin) {
210 yval = im->yorigin + 0.00001;
211 } else if (yval < im->yorigin - im->ysize) {
212 yval = im->yorigin - im->ysize - 0.00001;
219 /* conversion function for symbolic entry names */
222 #define conv_if(VV,VVV) \
223 if (strcmp(#VV, string) == 0) return VVV ;
229 conv_if(PRINT, GF_PRINT);
230 conv_if(GPRINT, GF_GPRINT);
231 conv_if(COMMENT, GF_COMMENT);
232 conv_if(HRULE, GF_HRULE);
233 conv_if(VRULE, GF_VRULE);
234 conv_if(LINE, GF_LINE);
235 conv_if(AREA, GF_AREA);
236 conv_if(STACK, GF_STACK);
237 conv_if(TICK, GF_TICK);
238 conv_if(DEF, GF_DEF);
239 conv_if(CDEF, GF_CDEF);
240 conv_if(VDEF, GF_VDEF);
241 conv_if(XPORT, GF_XPORT);
242 conv_if(SHIFT, GF_SHIFT);
247 enum gfx_if_en if_conv(
251 conv_if(PNG, IF_PNG);
252 conv_if(SVG, IF_SVG);
253 conv_if(EPS, IF_EPS);
254 conv_if(PDF, IF_PDF);
259 enum tmt_en tmt_conv(
263 conv_if(SECOND, TMT_SECOND);
264 conv_if(MINUTE, TMT_MINUTE);
265 conv_if(HOUR, TMT_HOUR);
266 conv_if(DAY, TMT_DAY);
267 conv_if(WEEK, TMT_WEEK);
268 conv_if(MONTH, TMT_MONTH);
269 conv_if(YEAR, TMT_YEAR);
273 enum grc_en grc_conv(
277 conv_if(BACK, GRC_BACK);
278 conv_if(CANVAS, GRC_CANVAS);
279 conv_if(SHADEA, GRC_SHADEA);
280 conv_if(SHADEB, GRC_SHADEB);
281 conv_if(GRID, GRC_GRID);
282 conv_if(MGRID, GRC_MGRID);
283 conv_if(FONT, GRC_FONT);
284 conv_if(ARROW, GRC_ARROW);
285 conv_if(AXIS, GRC_AXIS);
286 conv_if(FRAME, GRC_FRAME);
291 enum text_prop_en text_prop_conv(
295 conv_if(DEFAULT, TEXT_PROP_DEFAULT);
296 conv_if(TITLE, TEXT_PROP_TITLE);
297 conv_if(AXIS, TEXT_PROP_AXIS);
298 conv_if(UNIT, TEXT_PROP_UNIT);
299 conv_if(LEGEND, TEXT_PROP_LEGEND);
310 cairo_status_t status;
314 for (i = 0; i < (unsigned) im->gdes_c; i++) {
315 if (im->gdes[i].data_first) {
316 /* careful here, because a single pointer can occur several times */
317 free(im->gdes[i].data);
318 if (im->gdes[i].ds_namv) {
319 for (ii = 0; ii < im->gdes[i].ds_cnt; ii++)
320 free(im->gdes[i].ds_namv[ii]);
321 free(im->gdes[i].ds_namv);
324 free(im->gdes[i].p_data);
325 free(im->gdes[i].rpnp);
328 if (im->font_options)
329 cairo_font_options_destroy(im->font_options);
331 status = cairo_status(im->cr);
334 cairo_destroy(im->cr);
336 cairo_surface_destroy(im->surface);
338 fprintf(stderr, "OOPS: Cairo has issuesm it can't even die: %s\n",
339 cairo_status_to_string(status));
344 /* find SI magnitude symbol for the given number*/
346 image_desc_t *im, /* image description */
352 char *symbol[] = { "a", /* 10e-18 Atto */
353 "f", /* 10e-15 Femto */
354 "p", /* 10e-12 Pico */
355 "n", /* 10e-9 Nano */
356 "u", /* 10e-6 Micro */
357 "m", /* 10e-3 Milli */
362 "T", /* 10e12 Tera */
363 "P", /* 10e15 Peta */
370 if (*value == 0.0 || isnan(*value)) {
374 sindex = floor(log(fabs(*value)) / log((double) im->base));
375 *magfact = pow((double) im->base, (double) sindex);
376 (*value) /= (*magfact);
378 if (sindex <= symbcenter && sindex >= -symbcenter) {
379 (*symb_ptr) = symbol[sindex + symbcenter];
386 static char si_symbol[] = {
387 'a', /* 10e-18 Atto */
388 'f', /* 10e-15 Femto */
389 'p', /* 10e-12 Pico */
390 'n', /* 10e-9 Nano */
391 'u', /* 10e-6 Micro */
392 'm', /* 10e-3 Milli */
397 'T', /* 10e12 Tera */
398 'P', /* 10e15 Peta */
401 static const int si_symbcenter = 6;
403 /* find SI magnitude symbol for the numbers on the y-axis*/
405 image_desc_t *im /* image description */
409 double digits, viewdigits = 0;
412 floor(log(max(fabs(im->minval), fabs(im->maxval))) /
413 log((double) im->base));
415 if (im->unitsexponent != 9999) {
416 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
417 viewdigits = floor(im->unitsexponent / 3);
422 im->magfact = pow((double) im->base, digits);
425 printf("digits %6.3f im->magfact %6.3f\n", digits, im->magfact);
428 im->viewfactor = im->magfact / pow((double) im->base, viewdigits);
430 if (((viewdigits + si_symbcenter) < sizeof(si_symbol)) &&
431 ((viewdigits + si_symbcenter) >= 0))
432 im->symbol = si_symbol[(int) viewdigits + si_symbcenter];
437 /* move min and max values around to become sensible */
442 double sensiblevalues[] = { 1000.0, 900.0, 800.0, 750.0, 700.0,
443 600.0, 500.0, 400.0, 300.0, 250.0,
444 200.0, 125.0, 100.0, 90.0, 80.0,
445 75.0, 70.0, 60.0, 50.0, 40.0, 30.0,
446 25.0, 20.0, 10.0, 9.0, 8.0,
447 7.0, 6.0, 5.0, 4.0, 3.5, 3.0,
448 2.5, 2.0, 1.8, 1.5, 1.2, 1.0,
449 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.0, -1
452 double scaled_min, scaled_max;
459 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
460 im->minval, im->maxval, im->magfact);
463 if (isnan(im->ygridstep)) {
464 if (im->extra_flags & ALTAUTOSCALE) {
465 /* measure the amplitude of the function. Make sure that
466 graph boundaries are slightly higher then max/min vals
467 so we can see amplitude on the graph */
470 delt = im->maxval - im->minval;
472 fact = 2.0 * pow(10.0,
474 (max(fabs(im->minval), fabs(im->maxval)) /
477 adj = (fact - delt) * 0.55;
480 ("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n",
481 im->minval, im->maxval, delt, fact, adj);
486 } else if (im->extra_flags & ALTAUTOSCALE_MIN) {
487 /* measure the amplitude of the function. Make sure that
488 graph boundaries are slightly lower than min vals
489 so we can see amplitude on the graph */
490 adj = (im->maxval - im->minval) * 0.1;
492 } else if (im->extra_flags & ALTAUTOSCALE_MAX) {
493 /* measure the amplitude of the function. Make sure that
494 graph boundaries are slightly higher than max vals
495 so we can see amplitude on the graph */
496 adj = (im->maxval - im->minval) * 0.1;
499 scaled_min = im->minval / im->magfact;
500 scaled_max = im->maxval / im->magfact;
502 for (i = 1; sensiblevalues[i] > 0; i++) {
503 if (sensiblevalues[i - 1] >= scaled_min &&
504 sensiblevalues[i] <= scaled_min)
505 im->minval = sensiblevalues[i] * (im->magfact);
507 if (-sensiblevalues[i - 1] <= scaled_min &&
508 -sensiblevalues[i] >= scaled_min)
509 im->minval = -sensiblevalues[i - 1] * (im->magfact);
511 if (sensiblevalues[i - 1] >= scaled_max &&
512 sensiblevalues[i] <= scaled_max)
513 im->maxval = sensiblevalues[i - 1] * (im->magfact);
515 if (-sensiblevalues[i - 1] <= scaled_max &&
516 -sensiblevalues[i] >= scaled_max)
517 im->maxval = -sensiblevalues[i] * (im->magfact);
521 /* adjust min and max to the grid definition if there is one */
522 im->minval = (double) im->ylabfact * im->ygridstep *
523 floor(im->minval / ((double) im->ylabfact * im->ygridstep));
524 im->maxval = (double) im->ylabfact * im->ygridstep *
525 ceil(im->maxval / ((double) im->ylabfact * im->ygridstep));
529 fprintf(stderr, "SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
530 im->minval, im->maxval, im->magfact);
538 if (isnan(im->minval) || isnan(im->maxval))
541 if (im->logarithmic) {
542 double ya, yb, ypix, ypixfrac;
543 double log10_range = log10(im->maxval) - log10(im->minval);
545 ya = pow((double) 10, floor(log10(im->minval)));
546 while (ya < im->minval)
549 return; /* don't have y=10^x gridline */
551 if (yb <= im->maxval) {
552 /* we have at least 2 y=10^x gridlines.
553 Make sure distance between them in pixels
554 are an integer by expanding im->maxval */
555 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
556 double factor = y_pixel_delta / floor(y_pixel_delta);
557 double new_log10_range = factor * log10_range;
558 double new_ymax_log10 = log10(im->minval) + new_log10_range;
560 im->maxval = pow(10, new_ymax_log10);
561 ytr(im, DNAN); /* reset precalc */
562 log10_range = log10(im->maxval) - log10(im->minval);
564 /* make sure first y=10^x gridline is located on
565 integer pixel position by moving scale slightly
566 downwards (sub-pixel movement) */
567 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
568 ypixfrac = ypix - floor(ypix);
569 if (ypixfrac > 0 && ypixfrac < 1) {
570 double yfrac = ypixfrac / im->ysize;
572 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
573 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
574 ytr(im, DNAN); /* reset precalc */
577 /* Make sure we have an integer pixel distance between
578 each minor gridline */
579 double ypos1 = ytr(im, im->minval);
580 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
581 double y_pixel_delta = ypos1 - ypos2;
582 double factor = y_pixel_delta / floor(y_pixel_delta);
583 double new_range = factor * (im->maxval - im->minval);
584 double gridstep = im->ygrid_scale.gridstep;
585 double minor_y, minor_y_px, minor_y_px_frac;
587 if (im->maxval > 0.0)
588 im->maxval = im->minval + new_range;
590 im->minval = im->maxval - new_range;
591 ytr(im, DNAN); /* reset precalc */
592 /* make sure first minor gridline is on integer pixel y coord */
593 minor_y = gridstep * floor(im->minval / gridstep);
594 while (minor_y < im->minval)
596 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
597 minor_y_px_frac = minor_y_px - floor(minor_y_px);
598 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
599 double yfrac = minor_y_px_frac / im->ysize;
600 double range = im->maxval - im->minval;
602 im->minval = im->minval - yfrac * range;
603 im->maxval = im->maxval - yfrac * range;
604 ytr(im, DNAN); /* reset precalc */
606 calc_horizontal_grid(im); /* recalc with changed im->maxval */
610 /* reduce data reimplementation by Alex */
613 enum cf_en cf, /* which consolidation function ? */
614 unsigned long cur_step, /* step the data currently is in */
615 time_t *start, /* start, end and step as requested ... */
616 time_t *end, /* ... by the application will be ... */
617 unsigned long *step, /* ... adjusted to represent reality */
618 unsigned long *ds_cnt, /* number of data sources in file */
620 { /* two dimensional array containing the data */
621 int i, reduce_factor = ceil((double) (*step) / (double) cur_step);
622 unsigned long col, dst_row, row_cnt, start_offset, end_offset, skiprows =
624 rrd_value_t *srcptr, *dstptr;
626 (*step) = cur_step * reduce_factor; /* set new step size for reduced data */
629 row_cnt = ((*end) - (*start)) / cur_step;
635 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
636 row_cnt, reduce_factor, *start, *end, cur_step);
637 for (col = 0; col < row_cnt; col++) {
638 printf("time %10lu: ", *start + (col + 1) * cur_step);
639 for (i = 0; i < *ds_cnt; i++)
640 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
645 /* We have to combine [reduce_factor] rows of the source
646 ** into one row for the destination. Doing this we also
647 ** need to take care to combine the correct rows. First
648 ** alter the start and end time so that they are multiples
649 ** of the new step time. We cannot reduce the amount of
650 ** time so we have to move the end towards the future and
651 ** the start towards the past.
653 end_offset = (*end) % (*step);
654 start_offset = (*start) % (*step);
656 /* If there is a start offset (which cannot be more than
657 ** one destination row), skip the appropriate number of
658 ** source rows and one destination row. The appropriate
659 ** number is what we do know (start_offset/cur_step) of
660 ** the new interval (*step/cur_step aka reduce_factor).
663 printf("start_offset: %lu end_offset: %lu\n", start_offset, end_offset);
664 printf("row_cnt before: %lu\n", row_cnt);
667 (*start) = (*start) - start_offset;
668 skiprows = reduce_factor - start_offset / cur_step;
669 srcptr += skiprows * *ds_cnt;
670 for (col = 0; col < (*ds_cnt); col++)
675 printf("row_cnt between: %lu\n", row_cnt);
678 /* At the end we have some rows that are not going to be
679 ** used, the amount is end_offset/cur_step
682 (*end) = (*end) - end_offset + (*step);
683 skiprows = end_offset / cur_step;
687 printf("row_cnt after: %lu\n", row_cnt);
690 /* Sanity check: row_cnt should be multiple of reduce_factor */
691 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
693 if (row_cnt % reduce_factor) {
694 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
695 row_cnt, reduce_factor);
696 printf("BUG in reduce_data()\n");
700 /* Now combine reduce_factor intervals at a time
701 ** into one interval for the destination.
704 for (dst_row = 0; (long int) row_cnt >= reduce_factor; dst_row++) {
705 for (col = 0; col < (*ds_cnt); col++) {
706 rrd_value_t newval = DNAN;
707 unsigned long validval = 0;
709 for (i = 0; i < reduce_factor; i++) {
710 if (isnan(srcptr[i * (*ds_cnt) + col])) {
715 newval = srcptr[i * (*ds_cnt) + col];
723 newval += srcptr[i * (*ds_cnt) + col];
726 newval = min(newval, srcptr[i * (*ds_cnt) + col]);
729 /* an interval contains a failure if any subintervals contained a failure */
731 newval = max(newval, srcptr[i * (*ds_cnt) + col]);
734 newval = srcptr[i * (*ds_cnt) + col];
759 srcptr += (*ds_cnt) * reduce_factor;
760 row_cnt -= reduce_factor;
762 /* If we had to alter the endtime, we didn't have enough
763 ** source rows to fill the last row. Fill it with NaN.
766 for (col = 0; col < (*ds_cnt); col++)
769 row_cnt = ((*end) - (*start)) / *step;
771 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
772 row_cnt, *start, *end, *step);
773 for (col = 0; col < row_cnt; col++) {
774 printf("time %10lu: ", *start + (col + 1) * (*step));
775 for (i = 0; i < *ds_cnt; i++)
776 printf(" %8.2e", srcptr[*ds_cnt * col + i]);
783 /* get the data required for the graphs from the
792 /* pull the data from the rrd files ... */
793 for (i = 0; i < (int) im->gdes_c; i++) {
794 /* only GF_DEF elements fetch data */
795 if (im->gdes[i].gf != GF_DEF)
799 /* do we have it already ? */
800 for (ii = 0; ii < i; ii++) {
801 if (im->gdes[ii].gf != GF_DEF)
803 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
804 && (im->gdes[i].cf == im->gdes[ii].cf)
805 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
806 && (im->gdes[i].start_orig == im->gdes[ii].start_orig)
807 && (im->gdes[i].end_orig == im->gdes[ii].end_orig)
808 && (im->gdes[i].step_orig == im->gdes[ii].step_orig)) {
809 /* OK, the data is already there.
810 ** Just copy the header portion
812 im->gdes[i].start = im->gdes[ii].start;
813 im->gdes[i].end = im->gdes[ii].end;
814 im->gdes[i].step = im->gdes[ii].step;
815 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
816 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
817 im->gdes[i].data = im->gdes[ii].data;
818 im->gdes[i].data_first = 0;
825 unsigned long ft_step = im->gdes[i].step; /* ft_step will record what we got from fetch */
827 if ((rrd_fetch_fn(im->gdes[i].rrd,
833 &im->gdes[i].ds_namv,
834 &im->gdes[i].data)) == -1) {
837 im->gdes[i].data_first = 1;
839 if (ft_step < im->gdes[i].step) {
840 reduce_data(im->gdes[i].cf_reduce,
845 &im->gdes[i].ds_cnt, &im->gdes[i].data);
847 im->gdes[i].step = ft_step;
851 /* lets see if the required data source is really there */
852 for (ii = 0; ii < (int) im->gdes[i].ds_cnt; ii++) {
853 if (strcmp(im->gdes[i].ds_namv[ii], im->gdes[i].ds_nam) == 0) {
857 if (im->gdes[i].ds == -1) {
858 rrd_set_error("No DS called '%s' in '%s'",
859 im->gdes[i].ds_nam, im->gdes[i].rrd);
867 /* evaluate the expressions in the CDEF functions */
869 /*************************************************************
871 *************************************************************/
873 long find_var_wrapper(
877 return find_var((image_desc_t *) arg1, key);
880 /* find gdes containing var*/
887 for (ii = 0; ii < im->gdes_c - 1; ii++) {
888 if ((im->gdes[ii].gf == GF_DEF
889 || im->gdes[ii].gf == GF_VDEF || im->gdes[ii].gf == GF_CDEF)
890 && (strcmp(im->gdes[ii].vname, key) == 0)) {
897 /* find the largest common denominator for all the numbers
898 in the 0 terminated num array */
905 for (i = 0; num[i + 1] != 0; i++) {
907 rest = num[i] % num[i + 1];
913 /* return i==0?num[i]:num[i-1]; */
917 /* run the rpn calculator on all the VDEF and CDEF arguments */
924 long *steparray, rpi;
929 rpnstack_init(&rpnstack);
931 for (gdi = 0; gdi < im->gdes_c; gdi++) {
932 /* Look for GF_VDEF and GF_CDEF in the same loop,
933 * so CDEFs can use VDEFs and vice versa
935 switch (im->gdes[gdi].gf) {
939 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
941 /* remove current shift */
942 vdp->start -= vdp->shift;
943 vdp->end -= vdp->shift;
946 if (im->gdes[gdi].shidx >= 0)
947 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
950 vdp->shift = im->gdes[gdi].shval;
952 /* normalize shift to multiple of consolidated step */
953 vdp->shift = (vdp->shift / (long) vdp->step) * (long) vdp->step;
956 vdp->start += vdp->shift;
957 vdp->end += vdp->shift;
961 /* A VDEF has no DS. This also signals other parts
962 * of rrdtool that this is a VDEF value, not a CDEF.
964 im->gdes[gdi].ds_cnt = 0;
965 if (vdef_calc(im, gdi)) {
966 rrd_set_error("Error processing VDEF '%s'",
967 im->gdes[gdi].vname);
968 rpnstack_free(&rpnstack);
973 im->gdes[gdi].ds_cnt = 1;
974 im->gdes[gdi].ds = 0;
975 im->gdes[gdi].data_first = 1;
976 im->gdes[gdi].start = 0;
977 im->gdes[gdi].end = 0;
982 /* Find the variables in the expression.
983 * - VDEF variables are substituted by their values
984 * and the opcode is changed into OP_NUMBER.
985 * - CDEF variables are analized for their step size,
986 * the lowest common denominator of all the step
987 * sizes of the data sources involved is calculated
988 * and the resulting number is the step size for the
989 * resulting data source.
991 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
992 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
993 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
994 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
996 if (im->gdes[ptr].ds_cnt == 0) { /* this is a VDEF data source */
999 ("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
1000 im->gdes[gdi].vname, im->gdes[ptr].vname);
1001 printf("DEBUG: value from vdef is %f\n",
1002 im->gdes[ptr].vf.val);
1004 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
1005 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
1006 } else { /* normal variables and PREF(variables) */
1008 /* add one entry to the array that keeps track of the step sizes of the
1009 * data sources going into the CDEF. */
1011 rrd_realloc(steparray,
1013 1) * sizeof(*steparray))) == NULL) {
1014 rrd_set_error("realloc steparray");
1015 rpnstack_free(&rpnstack);
1019 steparray[stepcnt - 1] = im->gdes[ptr].step;
1021 /* adjust start and end of cdef (gdi) so
1022 * that it runs from the latest start point
1023 * to the earliest endpoint of any of the
1024 * rras involved (ptr)
1027 if (im->gdes[gdi].start < im->gdes[ptr].start)
1028 im->gdes[gdi].start = im->gdes[ptr].start;
1030 if (im->gdes[gdi].end == 0 ||
1031 im->gdes[gdi].end > im->gdes[ptr].end)
1032 im->gdes[gdi].end = im->gdes[ptr].end;
1034 /* store pointer to the first element of
1035 * the rra providing data for variable,
1036 * further save step size and data source
1039 im->gdes[gdi].rpnp[rpi].data =
1040 im->gdes[ptr].data + im->gdes[ptr].ds;
1041 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
1042 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
1044 /* backoff the *.data ptr; this is done so
1045 * rpncalc() function doesn't have to treat
1046 * the first case differently
1048 } /* if ds_cnt != 0 */
1049 } /* if OP_VARIABLE */
1050 } /* loop through all rpi */
1052 /* move the data pointers to the correct period */
1053 for (rpi = 0; im->gdes[gdi].rpnp[rpi].op != OP_END; rpi++) {
1054 if (im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
1055 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER) {
1056 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
1058 im->gdes[gdi].start - im->gdes[ptr].start;
1061 im->gdes[gdi].rpnp[rpi].data +=
1062 (diff / im->gdes[ptr].step) *
1063 im->gdes[ptr].ds_cnt;
1067 if (steparray == NULL) {
1068 rrd_set_error("rpn expressions without DEF"
1069 " or CDEF variables are not supported");
1070 rpnstack_free(&rpnstack);
1073 steparray[stepcnt] = 0;
1074 /* Now find the resulting step. All steps in all
1075 * used RRAs have to be visited
1077 im->gdes[gdi].step = lcd(steparray);
1079 if ((im->gdes[gdi].data = malloc(((im->gdes[gdi].end -
1080 im->gdes[gdi].start)
1081 / im->gdes[gdi].step)
1082 * sizeof(double))) == NULL) {
1083 rrd_set_error("malloc im->gdes[gdi].data");
1084 rpnstack_free(&rpnstack);
1088 /* Step through the new cdef results array and
1089 * calculate the values
1091 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
1092 now <= im->gdes[gdi].end; now += im->gdes[gdi].step) {
1093 rpnp_t *rpnp = im->gdes[gdi].rpnp;
1095 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
1096 * in this case we are advancing by timesteps;
1097 * we use the fact that time_t is a synonym for long
1099 if (rpn_calc(rpnp, &rpnstack, (long) now,
1100 im->gdes[gdi].data, ++dataidx) == -1) {
1101 /* rpn_calc sets the error string */
1102 rpnstack_free(&rpnstack);
1105 } /* enumerate over time steps within a CDEF */
1110 } /* enumerate over CDEFs */
1111 rpnstack_free(&rpnstack);
1115 /* massage data so, that we get one value for each x coordinate in the graph */
1120 double pixstep = (double) (im->end - im->start)
1121 / (double) im->xsize; /* how much time
1122 passes in one pixel */
1124 double minval = DNAN, maxval = DNAN;
1126 unsigned long gr_time;
1128 /* memory for the processed data */
1129 for (i = 0; i < im->gdes_c; i++) {
1130 if ((im->gdes[i].gf == GF_LINE) ||
1131 (im->gdes[i].gf == GF_AREA) || (im->gdes[i].gf == GF_TICK)) {
1132 if ((im->gdes[i].p_data = malloc((im->xsize + 1)
1133 * sizeof(rrd_value_t))) == NULL) {
1134 rrd_set_error("malloc data_proc");
1140 for (i = 0; i < im->xsize; i++) { /* for each pixel */
1143 gr_time = im->start + pixstep * i; /* time of the current step */
1146 for (ii = 0; ii < im->gdes_c; ii++) {
1149 switch (im->gdes[ii].gf) {
1153 if (!im->gdes[ii].stack)
1155 value = im->gdes[ii].yrule;
1156 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1157 /* The time of the data doesn't necessarily match
1158 ** the time of the graph. Beware.
1160 vidx = im->gdes[ii].vidx;
1161 if (im->gdes[vidx].gf == GF_VDEF) {
1162 value = im->gdes[vidx].vf.val;
1164 if (((long int) gr_time >=
1165 (long int) im->gdes[vidx].start)
1166 && ((long int) gr_time <=
1167 (long int) im->gdes[vidx].end)) {
1168 value = im->gdes[vidx].data[(unsigned long)
1174 im->gdes[vidx].step)
1175 * im->gdes[vidx].ds_cnt +
1182 if (!isnan(value)) {
1184 im->gdes[ii].p_data[i] = paintval;
1185 /* GF_TICK: the data values are not
1186 ** relevant for min and max
1188 if (finite(paintval) && im->gdes[ii].gf != GF_TICK) {
1189 if ((isnan(minval) || paintval < minval) &&
1190 !(im->logarithmic && paintval <= 0.0))
1192 if (isnan(maxval) || paintval > maxval)
1196 im->gdes[ii].p_data[i] = DNAN;
1201 ("STACK should already be turned into LINE or AREA here");
1210 /* if min or max have not been asigned a value this is because
1211 there was no data in the graph ... this is not good ...
1212 lets set these to dummy values then ... */
1214 if (im->logarithmic) {
1226 /* adjust min and max values */
1227 if (isnan(im->minval)
1228 /* don't adjust low-end with log scale *//* why not? */
1229 || ((!im->rigid) && im->minval > minval)
1231 if (im->logarithmic)
1232 im->minval = minval * 0.5;
1234 im->minval = minval;
1236 if (isnan(im->maxval)
1237 || (!im->rigid && im->maxval < maxval)
1239 if (im->logarithmic)
1240 im->maxval = maxval * 2.0;
1242 im->maxval = maxval;
1244 /* make sure min is smaller than max */
1245 if (im->minval > im->maxval) {
1246 im->minval = 0.99 * im->maxval;
1249 /* make sure min and max are not equal */
1250 if (im->minval == im->maxval) {
1252 if (!im->logarithmic) {
1255 /* make sure min and max are not both zero */
1256 if (im->maxval == 0.0) {
1265 /* identify the point where the first gridline, label ... gets placed */
1267 time_t find_first_time(
1268 time_t start, /* what is the initial time */
1269 enum tmt_en baseint, /* what is the basic interval */
1270 long basestep /* how many if these do we jump a time */
1275 localtime_r(&start, &tm);
1279 tm. tm_sec -= tm.tm_sec % basestep;
1284 tm. tm_min -= tm.tm_min % basestep;
1290 tm. tm_hour -= tm.tm_hour % basestep;
1294 /* we do NOT look at the basestep for this ... */
1301 /* we do NOT look at the basestep for this ... */
1305 tm. tm_mday -= tm.tm_wday - 1; /* -1 because we want the monday */
1307 if (tm.tm_wday == 0)
1308 tm. tm_mday -= 7; /* we want the *previous* monday */
1316 tm. tm_mon -= tm.tm_mon % basestep;
1327 tm.tm_year + 1900) %basestep;
1333 /* identify the point where the next gridline, label ... gets placed */
1334 time_t find_next_time(
1335 time_t current, /* what is the initial time */
1336 enum tmt_en baseint, /* what is the basic interval */
1337 long basestep /* how many if these do we jump a time */
1343 localtime_r(¤t, &tm);
1348 tm. tm_sec += basestep;
1352 tm. tm_min += basestep;
1356 tm. tm_hour += basestep;
1360 tm. tm_mday += basestep;
1364 tm. tm_mday += 7 * basestep;
1368 tm. tm_mon += basestep;
1372 tm. tm_year += basestep;
1374 madetime = mktime(&tm);
1375 } while (madetime == -1); /* this is necessary to skip impssible times
1376 like the daylight saving time skips */
1382 /* calculate values required for PRINT and GPRINT functions */
1388 long i, ii, validsteps;
1391 int graphelement = 0;
1394 double magfact = -1;
1399 /* wow initializing tmvdef is quite a task :-) */
1400 time_t now = time(NULL);
1402 localtime_r(&now, &tmvdef);
1405 for (i = 0; i < im->gdes_c; i++) {
1406 vidx = im->gdes[i].vidx;
1407 switch (im->gdes[i].gf) {
1411 rrd_realloc((*prdata), prlines * sizeof(char *))) == NULL) {
1412 rrd_set_error("realloc prdata");
1416 /* PRINT and GPRINT can now print VDEF generated values.
1417 * There's no need to do any calculations on them as these
1418 * calculations were already made.
1420 if (im->gdes[vidx].gf == GF_VDEF) { /* simply use vals */
1421 printval = im->gdes[vidx].vf.val;
1422 localtime_r(&im->gdes[vidx].vf.when, &tmvdef);
1423 } else { /* need to calculate max,min,avg etcetera */
1424 max_ii = ((im->gdes[vidx].end - im->gdes[vidx].start)
1425 / im->gdes[vidx].step * im->gdes[vidx].ds_cnt);
1428 for (ii = im->gdes[vidx].ds;
1429 ii < max_ii; ii += im->gdes[vidx].ds_cnt) {
1430 if (!finite(im->gdes[vidx].data[ii]))
1432 if (isnan(printval)) {
1433 printval = im->gdes[vidx].data[ii];
1438 switch (im->gdes[i].cf) {
1441 case CF_DEVSEASONAL:
1445 printval += im->gdes[vidx].data[ii];
1448 printval = min(printval, im->gdes[vidx].data[ii]);
1452 printval = max(printval, im->gdes[vidx].data[ii]);
1455 printval = im->gdes[vidx].data[ii];
1458 if (im->gdes[i].cf == CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1459 if (validsteps > 1) {
1460 printval = (printval / validsteps);
1463 } /* prepare printval */
1465 if ((percent_s = strstr(im->gdes[i].format, "%S")) != NULL) {
1466 /* Magfact is set to -1 upon entry to print_calc. If it
1467 * is still less than 0, then we need to run auto_scale.
1468 * Otherwise, put the value into the correct units. If
1469 * the value is 0, then do not set the symbol or magnification
1470 * so next the calculation will be performed again. */
1471 if (magfact < 0.0) {
1472 auto_scale(im, &printval, &si_symb, &magfact);
1473 if (printval == 0.0)
1476 printval /= magfact;
1478 *(++percent_s) = 's';
1479 } else if (strstr(im->gdes[i].format, "%s") != NULL) {
1480 auto_scale(im, &printval, &si_symb, &magfact);
1483 if (im->gdes[i].gf == GF_PRINT) {
1484 (*prdata)[prlines - 2] =
1485 malloc((FMT_LEG_LEN + 2) * sizeof(char));
1486 (*prdata)[prlines - 1] = NULL;
1487 if (im->gdes[i].strftm) {
1488 strftime((*prdata)[prlines - 2], FMT_LEG_LEN,
1489 im->gdes[i].format, &tmvdef);
1491 if (bad_format(im->gdes[i].format)) {
1492 rrd_set_error("bad format for PRINT in '%s'",
1493 im->gdes[i].format);
1496 #ifdef HAVE_SNPRINTF
1497 snprintf((*prdata)[prlines - 2], FMT_LEG_LEN,
1498 im->gdes[i].format, printval, si_symb);
1500 sprintf((*prdata)[prlines - 2], im->gdes[i].format,
1507 if (im->gdes[i].strftm) {
1508 strftime(im->gdes[i].legend, FMT_LEG_LEN,
1509 im->gdes[i].format, &tmvdef);
1511 if (bad_format(im->gdes[i].format)) {
1512 rrd_set_error("bad format for GPRINT in '%s'",
1513 im->gdes[i].format);
1516 #ifdef HAVE_SNPRINTF
1517 snprintf(im->gdes[i].legend, FMT_LEG_LEN - 2,
1518 im->gdes[i].format, printval, si_symb);
1520 sprintf(im->gdes[i].legend, im->gdes[i].format, printval,
1533 if (isnan(im->gdes[i].yrule)) { /* we must set this here or the legend printer can not decide to print the legend */
1534 im->gdes[i].yrule = im->gdes[vidx].vf.val;
1539 if (im->gdes[i].xrule == 0) { /* again ... the legend printer needs it */
1540 im->gdes[i].xrule = im->gdes[vidx].vf.when;
1548 #ifdef WITH_PIECHART
1556 ("STACK should already be turned into LINE or AREA here");
1561 return graphelement;
1565 /* place legends with color spots */
1571 int interleg = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1572 int border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0;
1573 int fill = 0, fill_last;
1575 int leg_x = border, leg_y = im->yimg;
1576 int leg_y_prev = im->yimg;
1579 int i, ii, mark = 0;
1580 char prt_fctn; /*special printfunctions */
1583 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
1584 if ((legspace = malloc(im->gdes_c * sizeof(int))) == NULL) {
1585 rrd_set_error("malloc for legspace");
1589 if (im->extra_flags & FULL_SIZE_MODE)
1590 leg_y = leg_y_prev =
1591 leg_y - (int) (im->text_prop[TEXT_PROP_LEGEND].size * 1.8);
1593 for (i = 0; i < im->gdes_c; i++) {
1596 /* hide legends for rules which are not displayed */
1598 if (!(im->extra_flags & FORCE_RULES_LEGEND)) {
1599 if (im->gdes[i].gf == GF_HRULE &&
1600 (im->gdes[i].yrule < im->minval
1601 || im->gdes[i].yrule > im->maxval))
1602 im->gdes[i].legend[0] = '\0';
1604 if (im->gdes[i].gf == GF_VRULE &&
1605 (im->gdes[i].xrule < im->start
1606 || im->gdes[i].xrule > im->end))
1607 im->gdes[i].legend[0] = '\0';
1610 leg_cc = strlen(im->gdes[i].legend);
1612 /* is there a controle code ant the end of the legend string ? */
1613 /* and it is not a tab \\t */
1614 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc - 2] == '\\'
1615 && im->gdes[i].legend[leg_cc - 1] != 't') {
1616 prt_fctn = im->gdes[i].legend[leg_cc - 1];
1618 im->gdes[i].legend[leg_cc] = '\0';
1622 /* only valid control codes */
1623 if (prt_fctn != 'l' && prt_fctn != 'n' && /* a synonym for l */
1628 prt_fctn != 't' && prt_fctn != '\0' && prt_fctn != 'g') {
1630 rrd_set_error("Unknown control code at the end of '%s\\%c'",
1631 im->gdes[i].legend, prt_fctn);
1636 /* remove exess space */
1637 if (prt_fctn == 'n') {
1641 while (prt_fctn == 'g' &&
1642 leg_cc > 0 && im->gdes[i].legend[leg_cc - 1] == ' ') {
1644 im->gdes[i].legend[leg_cc] = '\0';
1647 legspace[i] = (prt_fctn == 'g' ? 0 : interleg);
1650 /* no interleg space if string ends in \g */
1651 fill += legspace[i];
1653 fill += gfx_get_text_width(im, fill + border,
1654 im->text_prop[TEXT_PROP_LEGEND].
1656 im->text_prop[TEXT_PROP_LEGEND].
1658 im->gdes[i].legend);
1663 /* who said there was a special tag ... ? */
1664 if (prt_fctn == 'g') {
1667 if (prt_fctn == '\0') {
1668 if (i == im->gdes_c - 1)
1671 /* is it time to place the legends ? */
1672 if (fill > im->ximg - 2 * border) {
1687 if (prt_fctn != '\0') {
1689 if (leg_c >= 2 && prt_fctn == 'j') {
1690 glue = (im->ximg - fill - 2 * border) / (leg_c - 1);
1694 if (prt_fctn == 'c')
1695 leg_x = (im->ximg - fill) / 2.0;
1696 if (prt_fctn == 'r')
1697 leg_x = im->ximg - fill - border;
1699 for (ii = mark; ii <= i; ii++) {
1700 if (im->gdes[ii].legend[0] == '\0')
1701 continue; /* skip empty legends */
1702 im->gdes[ii].leg_x = leg_x;
1703 im->gdes[ii].leg_y = leg_y;
1705 gfx_get_text_width(im, leg_x,
1706 im->text_prop[TEXT_PROP_LEGEND].
1708 im->text_prop[TEXT_PROP_LEGEND].
1710 im->gdes[ii].legend)
1715 if (im->extra_flags & FULL_SIZE_MODE) {
1716 /* only add y space if there was text on the line */
1717 if (leg_x > border || prt_fctn == 's')
1718 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1719 if (prt_fctn == 's')
1720 leg_y += im->text_prop[TEXT_PROP_LEGEND].size;
1722 if (leg_x > border || prt_fctn == 's')
1723 leg_y += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1724 if (prt_fctn == 's')
1725 leg_y -= im->text_prop[TEXT_PROP_LEGEND].size;
1733 if (im->extra_flags & FULL_SIZE_MODE) {
1734 if (leg_y != leg_y_prev) {
1735 *gY = leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1737 leg_y - im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1740 im->yimg = leg_y_prev;
1741 /* if we did place some legends we have to add vertical space */
1742 if (leg_y != im->yimg)
1743 im->yimg += im->text_prop[TEXT_PROP_LEGEND].size * 1.8;
1750 /* create a grid on the graph. it determines what to do
1751 from the values of xsize, start and end */
1753 /* the xaxis labels are determined from the number of seconds per pixel
1754 in the requested graph */
1758 int calc_horizontal_grid(
1765 int decimals, fractionals;
1767 im->ygrid_scale.labfact = 2;
1768 range = im->maxval - im->minval;
1769 scaledrange = range / im->magfact;
1771 /* does the scale of this graph make it impossible to put lines
1772 on it? If so, give up. */
1773 if (isnan(scaledrange)) {
1777 /* find grid spaceing */
1779 if (isnan(im->ygridstep)) {
1780 if (im->extra_flags & ALTYGRID) {
1781 /* find the value with max number of digits. Get number of digits */
1784 (max(fabs(im->maxval), fabs(im->minval)) *
1785 im->viewfactor / im->magfact));
1786 if (decimals <= 0) /* everything is small. make place for zero */
1789 im->ygrid_scale.gridstep =
1791 floor(log10(range * im->viewfactor / im->magfact))) /
1792 im->viewfactor * im->magfact;
1794 if (im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1795 im->ygrid_scale.gridstep = 0.1;
1796 /* should have at least 5 lines but no more then 15 */
1797 if (range / im->ygrid_scale.gridstep < 5)
1798 im->ygrid_scale.gridstep /= 10;
1799 if (range / im->ygrid_scale.gridstep > 15)
1800 im->ygrid_scale.gridstep *= 10;
1801 if (range / im->ygrid_scale.gridstep > 5) {
1802 im->ygrid_scale.labfact = 1;
1803 if (range / im->ygrid_scale.gridstep > 8)
1804 im->ygrid_scale.labfact = 2;
1806 im->ygrid_scale.gridstep /= 5;
1807 im->ygrid_scale.labfact = 5;
1811 (im->ygrid_scale.gridstep *
1812 (double) im->ygrid_scale.labfact * im->viewfactor /
1814 if (fractionals < 0) { /* small amplitude. */
1815 int len = decimals - fractionals + 1;
1817 if (im->unitslength < len + 2)
1818 im->unitslength = len + 2;
1819 sprintf(im->ygrid_scale.labfmt, "%%%d.%df%s", len,
1820 -fractionals, (im->symbol != ' ' ? " %c" : ""));
1822 int len = decimals + 1;
1824 if (im->unitslength < len + 2)
1825 im->unitslength = len + 2;
1826 sprintf(im->ygrid_scale.labfmt, "%%%d.0f%s", len,
1827 (im->symbol != ' ' ? " %c" : ""));
1830 for (i = 0; ylab[i].grid > 0; i++) {
1831 pixel = im->ysize / (scaledrange / ylab[i].grid);
1837 for (i = 0; i < 4; i++) {
1838 if (pixel * ylab[gridind].lfac[i] >=
1839 2.5 * im->text_prop[TEXT_PROP_AXIS].size) {
1840 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1845 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1848 im->ygrid_scale.gridstep = im->ygridstep;
1849 im->ygrid_scale.labfact = im->ylabfact;
1854 int draw_horizontal_grid(
1859 char graph_label[100];
1861 double X0 = im->xorigin;
1862 double X1 = im->xorigin + im->xsize;
1864 int sgrid = (int) (im->minval / im->ygrid_scale.gridstep - 1);
1865 int egrid = (int) (im->maxval / im->ygrid_scale.gridstep + 1);
1869 im->ygrid_scale.gridstep / (double) im->magfact *
1870 (double) im->viewfactor;
1871 MaxY = scaledstep * (double) egrid;
1872 for (i = sgrid; i <= egrid; i++) {
1873 double Y0 = ytr(im, im->ygrid_scale.gridstep * i);
1874 double YN = ytr(im, im->ygrid_scale.gridstep * (i + 1));
1876 if (floor(Y0 + 0.5) >= im->yorigin - im->ysize
1877 && floor(Y0 + 0.5) <= im->yorigin) {
1878 /* Make sure at least 2 grid labels are shown, even if it doesn't agree
1879 with the chosen settings. Add a label if required by settings, or if
1880 there is only one label so far and the next grid line is out of bounds. */
1881 if (i % im->ygrid_scale.labfact == 0
1883 && (YN < im->yorigin - im->ysize || YN > im->yorigin))) {
1884 if (im->symbol == ' ') {
1885 if (im->extra_flags & ALTYGRID) {
1886 sprintf(graph_label, im->ygrid_scale.labfmt,
1887 scaledstep * (double) i);
1890 sprintf(graph_label, "%4.1f",
1891 scaledstep * (double) i);
1893 sprintf(graph_label, "%4.0f",
1894 scaledstep * (double) i);
1898 char sisym = (i == 0 ? ' ' : im->symbol);
1900 if (im->extra_flags & ALTYGRID) {
1901 sprintf(graph_label, im->ygrid_scale.labfmt,
1902 scaledstep * (double) i, sisym);
1905 sprintf(graph_label, "%4.1f %c",
1906 scaledstep * (double) i, sisym);
1908 sprintf(graph_label, "%4.0f %c",
1909 scaledstep * (double) i, sisym);
1916 X0 - im->text_prop[TEXT_PROP_AXIS].size, Y0,
1917 im->graph_col[GRC_FONT],
1918 im->text_prop[TEXT_PROP_AXIS].font,
1919 im->text_prop[TEXT_PROP_AXIS].size,
1920 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1924 X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
1927 X1 + 2, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
1931 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1932 im->grid_dash_on, im->grid_dash_off);
1934 } else if (!(im->extra_flags & NOMINOR)) {
1937 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
1940 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
1944 GRIDWIDTH, im->graph_col[GRC_GRID],
1945 im->grid_dash_on, im->grid_dash_off);
1953 /* this is frexp for base 10 */
1964 iexp = floor(log(fabs(x)) / log(10));
1965 mnt = x / pow(10.0, iexp);
1968 mnt = x / pow(10.0, iexp);
1974 /* from http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm */
1975 /* yes we are loosing precision by doing tos with floats instead of doubles
1976 but it seems more stable this way. */
1978 static int AlmostEqual2sComplement(
1984 int aInt = *(int *) &A;
1985 int bInt = *(int *) &B;
1988 /* Make sure maxUlps is non-negative and small enough that the
1989 default NAN won't compare as equal to anything. */
1991 /* assert(maxUlps > 0 && maxUlps < 4 * 1024 * 1024); */
1993 /* Make aInt lexicographically ordered as a twos-complement int */
1996 aInt = 0x80000000l - aInt;
1998 /* Make bInt lexicographically ordered as a twos-complement int */
2001 bInt = 0x80000000l - bInt;
2003 intDiff = abs(aInt - bInt);
2005 if (intDiff <= maxUlps)
2011 /* logaritmic horizontal grid */
2012 int horizontal_log_grid(
2015 double yloglab[][10] = {
2016 {1.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
2017 {1.0, 5.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
2018 {1.0, 2.0, 5.0, 7.0, 10., 0.0, 0.0, 0.0, 0.0, 0.0},
2019 {1.0, 2.0, 4.0, 6.0, 8.0, 10., 0.0, 0.0, 0.0, 0.0},
2020 {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.},
2021 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* last line */
2024 int i, j, val_exp, min_exp;
2025 double nex; /* number of decades in data */
2026 double logscale; /* scale in logarithmic space */
2027 int exfrac = 1; /* decade spacing */
2028 int mid = -1; /* row in yloglab for major grid */
2029 double mspac; /* smallest major grid spacing (pixels) */
2030 int flab; /* first value in yloglab to use */
2031 double value, tmp, pre_value;
2033 char graph_label[100];
2035 nex = log10(im->maxval / im->minval);
2036 logscale = im->ysize / nex;
2038 /* major spacing for data with high dynamic range */
2039 while (logscale * exfrac < 3 * im->text_prop[TEXT_PROP_LEGEND].size) {
2046 /* major spacing for less dynamic data */
2048 /* search best row in yloglab */
2050 for (i = 0; yloglab[mid][i + 1] < 10.0; i++);
2051 mspac = logscale * log10(10.0 / yloglab[mid][i]);
2052 } while (mspac > 2 * im->text_prop[TEXT_PROP_LEGEND].size
2053 && yloglab[mid][0] > 0);
2057 /* find first value in yloglab */
2059 yloglab[mid][flab] < 10
2060 && frexp10(im->minval, &tmp) > yloglab[mid][flab]; flab++);
2061 if (yloglab[mid][flab] == 10.0) {
2066 if (val_exp % exfrac)
2067 val_exp += abs(-val_exp % exfrac);
2070 X1 = im->xorigin + im->xsize;
2076 value = yloglab[mid][flab] * pow(10.0, val_exp);
2077 if (AlmostEqual2sComplement(value, pre_value, 4))
2078 break; /* it seems we are not converging */
2082 Y0 = ytr(im, value);
2083 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2086 /* major grid line */
2089 X0 - 2, Y0, X0, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2091 X1, Y0, X1 + 2, Y0, MGRIDWIDTH, im->graph_col[GRC_MGRID]);
2097 MGRIDWIDTH, im->graph_col[GRC_MGRID],
2098 im->grid_dash_on, im->grid_dash_off);
2101 if (im->extra_flags & FORCE_UNITS_SI) {
2106 scale = floor(val_exp / 3.0);
2108 pvalue = pow(10.0, val_exp % 3);
2110 pvalue = pow(10.0, ((val_exp + 1) % 3) + 2);
2111 pvalue *= yloglab[mid][flab];
2113 if (((scale + si_symbcenter) < (int) sizeof(si_symbol)) &&
2114 ((scale + si_symbcenter) >= 0))
2115 symbol = si_symbol[scale + si_symbcenter];
2119 sprintf(graph_label, "%3.0f %c", pvalue, symbol);
2121 sprintf(graph_label, "%3.0e", value);
2123 X0 - im->text_prop[TEXT_PROP_AXIS].size, Y0,
2124 im->graph_col[GRC_FONT],
2125 im->text_prop[TEXT_PROP_AXIS].font,
2126 im->text_prop[TEXT_PROP_AXIS].size,
2127 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER, graph_label);
2130 if (mid < 4 && exfrac == 1) {
2131 /* find first and last minor line behind current major line
2132 * i is the first line and j tha last */
2134 min_exp = val_exp - 1;
2135 for (i = 1; yloglab[mid][i] < 10.0; i++);
2136 i = yloglab[mid][i - 1] + 1;
2140 i = yloglab[mid][flab - 1] + 1;
2141 j = yloglab[mid][flab];
2144 /* draw minor lines below current major line */
2145 for (; i < j; i++) {
2147 value = i * pow(10.0, min_exp);
2148 if (value < im->minval)
2151 Y0 = ytr(im, value);
2152 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2158 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2161 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2165 GRIDWIDTH, im->graph_col[GRC_GRID],
2166 im->grid_dash_on, im->grid_dash_off);
2168 } else if (exfrac > 1) {
2169 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2170 value = pow(10.0, i);
2171 if (value < im->minval)
2174 Y0 = ytr(im, value);
2175 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2181 X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2184 X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2188 GRIDWIDTH, im->graph_col[GRC_GRID],
2189 im->grid_dash_on, im->grid_dash_off);
2194 if (yloglab[mid][++flab] == 10.0) {
2200 /* draw minor lines after highest major line */
2201 if (mid < 4 && exfrac == 1) {
2202 /* find first and last minor line below current major line
2203 * i is the first line and j tha last */
2205 min_exp = val_exp - 1;
2206 for (i = 1; yloglab[mid][i] < 10.0; i++);
2207 i = yloglab[mid][i - 1] + 1;
2211 i = yloglab[mid][flab - 1] + 1;
2212 j = yloglab[mid][flab];
2215 /* draw minor lines below current major line */
2216 for (; i < j; i++) {
2218 value = i * pow(10.0, min_exp);
2219 if (value < im->minval)
2222 Y0 = ytr(im, value);
2223 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2228 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2230 X1, Y0, X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2234 GRIDWIDTH, im->graph_col[GRC_GRID],
2235 im->grid_dash_on, im->grid_dash_off);
2238 /* fancy minor gridlines */
2239 else if (exfrac > 1) {
2240 for (i = val_exp - exfrac / 3 * 2; i < val_exp; i += exfrac / 3) {
2241 value = pow(10.0, i);
2242 if (value < im->minval)
2245 Y0 = ytr(im, value);
2246 if (floor(Y0 + 0.5) <= im->yorigin - im->ysize)
2251 X0 - 2, Y0, X0, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2253 X1, Y0, X1 + 2, Y0, GRIDWIDTH, im->graph_col[GRC_GRID]);
2257 GRIDWIDTH, im->graph_col[GRC_GRID],
2258 im->grid_dash_on, im->grid_dash_off);
2269 int xlab_sel; /* which sort of label and grid ? */
2270 time_t ti, tilab, timajor;
2272 char graph_label[100];
2273 double X0, Y0, Y1; /* points for filled graph and more */
2276 /* the type of time grid is determined by finding
2277 the number of seconds per pixel in the graph */
2280 if (im->xlab_user.minsec == -1) {
2281 factor = (im->end - im->start) / im->xsize;
2283 while (xlab[xlab_sel + 1].minsec != -1
2284 && xlab[xlab_sel + 1].minsec <= factor) {
2286 } /* pick the last one */
2287 while (xlab[xlab_sel - 1].minsec == xlab[xlab_sel].minsec
2288 && xlab[xlab_sel].length > (im->end - im->start)) {
2290 } /* go back to the smallest size */
2291 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
2292 im->xlab_user.gridst = xlab[xlab_sel].gridst;
2293 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
2294 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
2295 im->xlab_user.labtm = xlab[xlab_sel].labtm;
2296 im->xlab_user.labst = xlab[xlab_sel].labst;
2297 im->xlab_user.precis = xlab[xlab_sel].precis;
2298 im->xlab_user.stst = xlab[xlab_sel].stst;
2301 /* y coords are the same for every line ... */
2303 Y1 = im->yorigin - im->ysize;
2306 /* paint the minor grid */
2307 if (!(im->extra_flags & NOMINOR)) {
2308 for (ti = find_first_time(im->start,
2309 im->xlab_user.gridtm,
2310 im->xlab_user.gridst),
2311 timajor = find_first_time(im->start,
2312 im->xlab_user.mgridtm,
2313 im->xlab_user.mgridst);
2316 find_next_time(ti, im->xlab_user.gridtm, im->xlab_user.gridst)
2318 /* are we inside the graph ? */
2319 if (ti < im->start || ti > im->end)
2321 while (timajor < ti) {
2322 timajor = find_next_time(timajor,
2323 im->xlab_user.mgridtm,
2324 im->xlab_user.mgridst);
2327 continue; /* skip as falls on major grid line */
2329 gfx_line(im, X0, Y1 - 2, X0, Y1, GRIDWIDTH,
2330 im->graph_col[GRC_GRID]);
2331 gfx_line(im, X0, Y0, X0, Y0 + 2, GRIDWIDTH,
2332 im->graph_col[GRC_GRID]);
2333 gfx_dashed_line(im, X0, Y0 + 1, X0, Y1 - 1, GRIDWIDTH,
2334 im->graph_col[GRC_GRID],
2335 im->grid_dash_on, im->grid_dash_off);
2340 /* paint the major grid */
2341 for (ti = find_first_time(im->start,
2342 im->xlab_user.mgridtm,
2343 im->xlab_user.mgridst);
2345 ti = find_next_time(ti, im->xlab_user.mgridtm, im->xlab_user.mgridst)
2347 /* are we inside the graph ? */
2348 if (ti < im->start || ti > im->end)
2351 gfx_line(im, X0, Y1 - 2, X0, Y1, MGRIDWIDTH,
2352 im->graph_col[GRC_MGRID]);
2353 gfx_line(im, X0, Y0, X0, Y0 + 3, MGRIDWIDTH,
2354 im->graph_col[GRC_MGRID]);
2355 gfx_dashed_line(im, X0, Y0 + 3, X0, Y1 - 2, MGRIDWIDTH,
2356 im->graph_col[GRC_MGRID],
2357 im->grid_dash_on, im->grid_dash_off);
2360 /* paint the labels below the graph */
2361 for (ti = find_first_time(im->start - im->xlab_user.precis / 2,
2362 im->xlab_user.labtm,
2363 im->xlab_user.labst);
2364 ti <= im->end - im->xlab_user.precis / 2;
2365 ti = find_next_time(ti, im->xlab_user.labtm, im->xlab_user.labst)
2367 tilab = ti + im->xlab_user.precis / 2; /* correct time for the label */
2368 /* are we inside the graph ? */
2369 if (tilab < im->start || tilab > im->end)
2373 localtime_r(&tilab, &tm);
2374 strftime(graph_label, 99, im->xlab_user.stst, &tm);
2376 # error "your libc has no strftime I guess we'll abort the exercise here."
2381 im->graph_col[GRC_FONT],
2382 im->text_prop[TEXT_PROP_AXIS].font,
2383 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 0.0,
2384 GFX_H_CENTER, GFX_V_TOP, graph_label);
2394 /* draw x and y axis */
2395 /* gfx_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
2396 im->xorigin+im->xsize,im->yorigin-im->ysize,
2397 GRIDWIDTH, im->graph_col[GRC_AXIS]);
2399 gfx_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
2400 im->xorigin+im->xsize,im->yorigin-im->ysize,
2401 GRIDWIDTH, im->graph_col[GRC_AXIS]); */
2403 gfx_line(im, im->xorigin - 4, im->yorigin,
2404 im->xorigin + im->xsize + 4, im->yorigin,
2405 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2407 gfx_line(im, im->xorigin, im->yorigin + 4,
2408 im->xorigin, im->yorigin - im->ysize - 4,
2409 MGRIDWIDTH, im->graph_col[GRC_AXIS]);
2412 /* arrow for X and Y axis direction */
2414 gfx_new_area(im, im->xorigin + im->xsize + 2, im->yorigin - 3, im->xorigin + im->xsize + 2, im->yorigin + 3, im->xorigin + im->xsize + 7, im->yorigin, /* horyzontal */
2415 im->graph_col[GRC_ARROW]);
2418 gfx_new_area(im, im->xorigin - 3, im->yorigin - im->ysize - 2, im->xorigin + 3, im->yorigin - im->ysize - 2, im->xorigin, im->yorigin - im->ysize - 7, /* vertical */
2419 im->graph_col[GRC_ARROW]);
2430 double X0, Y0; /* points for filled graph and more */
2431 struct gfx_color_t water_color;
2433 /* draw 3d border */
2434 gfx_new_area(im, 0, im->yimg,
2435 2, im->yimg - 2, 2, 2, im->graph_col[GRC_SHADEA]);
2436 gfx_add_point(im, im->ximg - 2, 2);
2437 gfx_add_point(im, im->ximg, 0);
2438 gfx_add_point(im, 0, 0);
2441 gfx_new_area(im, 2, im->yimg - 2,
2442 im->ximg - 2, im->yimg - 2,
2443 im->ximg - 2, 2, im->graph_col[GRC_SHADEB]);
2444 gfx_add_point(im, im->ximg, 0);
2445 gfx_add_point(im, im->ximg, im->yimg);
2446 gfx_add_point(im, 0, im->yimg);
2450 if (im->draw_x_grid == 1)
2453 if (im->draw_y_grid == 1) {
2454 if (im->logarithmic) {
2455 res = horizontal_log_grid(im);
2457 res = draw_horizontal_grid(im);
2460 /* dont draw horizontal grid if there is no min and max val */
2462 char *nodata = "No Data found";
2464 gfx_text(im, im->ximg / 2,
2465 (2 * im->yorigin - im->ysize) / 2,
2466 im->graph_col[GRC_FONT],
2467 im->text_prop[TEXT_PROP_AXIS].font,
2468 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
2469 0.0, GFX_H_CENTER, GFX_V_CENTER, nodata);
2473 /* yaxis unit description */
2475 10, (im->yorigin - im->ysize / 2),
2476 im->graph_col[GRC_FONT],
2477 im->text_prop[TEXT_PROP_UNIT].font,
2478 im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth,
2479 RRDGRAPH_YLEGEND_ANGLE, GFX_H_CENTER, GFX_V_CENTER, im->ylegend);
2484 im->graph_col[GRC_FONT],
2485 im->text_prop[TEXT_PROP_TITLE].font,
2486 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
2487 GFX_H_CENTER, GFX_V_TOP, im->title);
2488 /* rrdtool 'logo' */
2489 water_color = im->graph_col[GRC_FONT];
2490 water_color.alpha = 0.3;
2494 im->text_prop[TEXT_PROP_AXIS].font,
2495 5.5, im->tabwidth, -90,
2496 GFX_H_LEFT, GFX_V_TOP, "RRDTOOL / TOBI OETIKER");
2498 /* graph watermark */
2499 if (im->watermark[0] != '\0') {
2501 im->ximg / 2, im->yimg - 6,
2503 im->text_prop[TEXT_PROP_AXIS].font,
2504 5.5, im->tabwidth, 0,
2505 GFX_H_CENTER, GFX_V_BOTTOM, im->watermark);
2509 if (!(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH)) {
2510 for (i = 0; i < im->gdes_c; i++) {
2511 if (im->gdes[i].legend[0] == '\0')
2514 /* im->gdes[i].leg_y is the bottom of the legend */
2515 X0 = im->gdes[i].leg_x;
2516 Y0 = im->gdes[i].leg_y;
2517 gfx_text(im, X0, Y0,
2518 im->graph_col[GRC_FONT],
2519 im->text_prop[TEXT_PROP_LEGEND].font,
2520 im->text_prop[TEXT_PROP_LEGEND].size,
2521 im->tabwidth, 0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2522 im->gdes[i].legend);
2523 /* The legend for GRAPH items starts with "M " to have
2524 enough space for the box */
2525 if (im->gdes[i].gf != GF_PRINT &&
2526 im->gdes[i].gf != GF_GPRINT && im->gdes[i].gf != GF_COMMENT) {
2531 boxH = gfx_get_text_width(im, 0,
2532 im->text_prop[TEXT_PROP_LEGEND].
2534 im->text_prop[TEXT_PROP_LEGEND].
2535 size, im->tabwidth, "o") * 1.2;
2538 /* shift the box up a bit */
2541 /* make sure transparent colors show up the same way as in the graph */
2545 X0, Y0, X0 + boxH, Y0, im->graph_col[GRC_BACK]);
2546 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2551 X0, Y0, X0 + boxH, Y0, im->gdes[i].col);
2552 gfx_add_point(im, X0 + boxH, Y0 - boxV);
2556 cairo_new_path(im->cr);
2557 cairo_set_line_width(im->cr, 1.0);
2560 gfx_line_fit(im, &X0, &Y0);
2561 gfx_line_fit(im, &X1, &Y1);
2562 cairo_move_to(im->cr, X0, Y0);
2563 cairo_line_to(im->cr, X1, Y0);
2564 cairo_line_to(im->cr, X1, Y1);
2565 cairo_line_to(im->cr, X0, Y1);
2566 cairo_close_path(im->cr);
2567 cairo_set_source_rgba(im->cr, im->graph_col[GRC_FRAME].red,
2568 im->graph_col[GRC_FRAME].green,
2569 im->graph_col[GRC_FRAME].blue,
2570 im->graph_col[GRC_FRAME].alpha);
2571 cairo_stroke(im->cr);
2572 cairo_restore(im->cr);
2579 /*****************************************************
2580 * lazy check make sure we rely need to create this graph
2581 *****************************************************/
2588 struct stat imgstat;
2591 return 0; /* no lazy option */
2592 if (stat(im->graphfile, &imgstat) != 0)
2593 return 0; /* can't stat */
2594 /* one pixel in the existing graph is more then what we would
2596 if (time(NULL) - imgstat.st_mtime > (im->end - im->start) / im->xsize)
2598 if ((fd = fopen(im->graphfile, "rb")) == NULL)
2599 return 0; /* the file does not exist */
2600 switch (im->imgformat) {
2602 size = PngSize(fd, &(im->ximg), &(im->yimg));
2612 int graph_size_location(
2616 /* The actual size of the image to draw is determined from
2617 ** several sources. The size given on the command line is
2618 ** the graph area but we need more as we have to draw labels
2619 ** and other things outside the graph area
2622 int Xvertical = 0, Ytitle = 0, Xylabel = 0, Xmain = 0, Ymain = 0,
2623 Yxlabel = 0, Xspacing = 15, Yspacing = 15, Ywatermark = 4;
2625 if (im->extra_flags & ONLY_GRAPH) {
2627 im->ximg = im->xsize;
2628 im->yimg = im->ysize;
2629 im->yorigin = im->ysize;
2634 /** +---+--------------------------------------------+
2635 ** | y |...............graph title..................|
2636 ** | +---+-------------------------------+--------+
2639 ** | i | a | | pie |
2640 ** | s | x | main graph area | chart |
2645 ** | l | b +-------------------------------+--------+
2646 ** | e | l | x axis labels | |
2647 ** +---+---+-------------------------------+--------+
2648 ** |....................legends.....................|
2649 ** +------------------------------------------------+
2651 ** +------------------------------------------------+
2654 if (im->ylegend[0] != '\0') {
2655 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2658 if (im->title[0] != '\0') {
2659 /* The title is placed "inbetween" two text lines so it
2660 ** automatically has some vertical spacing. The horizontal
2661 ** spacing is added here, on each side.
2663 /* if necessary, reduce the font size of the title until it fits the image width */
2664 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2668 if (im->draw_x_grid) {
2669 Yxlabel = im->text_prop[TEXT_PROP_AXIS].size * 2.5;
2671 if (im->draw_y_grid || im->forceleftspace) {
2672 Xylabel = gfx_get_text_width(im, 0,
2673 im->text_prop[TEXT_PROP_AXIS].font,
2674 im->text_prop[TEXT_PROP_AXIS].size,
2675 im->tabwidth, "0") * im->unitslength;
2679 if (im->extra_flags & FULL_SIZE_MODE) {
2680 /* The actual size of the image to draw has been determined by the user.
2681 ** The graph area is the space remaining after accounting for the legend,
2682 ** the watermark, the pie chart, the axis labels, and the title.
2685 im->ximg = im->xsize;
2686 im->yimg = im->ysize;
2687 im->yorigin = im->ysize;
2691 im->yorigin += Ytitle;
2693 /* Now calculate the total size. Insert some spacing where
2694 desired. im->xorigin and im->yorigin need to correspond
2695 with the lower left corner of the main graph area or, if
2696 this one is not set, the imaginary box surrounding the
2699 /* Initial size calculation for the main graph area */
2700 Xmain = im->ximg - (Xylabel + 2 * Xspacing);
2702 Xmain -= Xspacing; /* put space between main graph area and right edge */
2704 im->xorigin = Xspacing + Xylabel;
2706 /* the length of the title should not influence with width of the graph
2707 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2709 if (Xvertical) { /* unit description */
2711 im->xorigin += Xvertical;
2716 /* The vertical size of the image is known in advance. The main graph area
2717 ** (Ymain) and im->yorigin must be set according to the space requirements
2718 ** of the legend and the axis labels.
2721 if (im->extra_flags & NOLEGEND) {
2722 /* set dimensions correctly if using full size mode with no legend */
2724 im->yimg - im->text_prop[TEXT_PROP_AXIS].size * 2.5 -
2726 Ymain = im->yorigin;
2728 /* Determine where to place the legends onto the image.
2729 ** Set Ymain and adjust im->yorigin to match the space requirements.
2731 if (leg_place(im, &Ymain) == -1)
2736 /* remove title space *or* some padding above the graph from the main graph area */
2740 Ymain -= 1.5 * Yspacing;
2743 /* watermark doesn't seem to effect the vertical size of the main graph area, oh well! */
2744 if (im->watermark[0] != '\0') {
2745 Ymain -= Ywatermark;
2750 } else { /* dimension options -width and -height refer to the dimensions of the main graph area */
2752 /* The actual size of the image to draw is determined from
2753 ** several sources. The size given on the command line is
2754 ** the graph area but we need more as we have to draw labels
2755 ** and other things outside the graph area.
2758 if (im->ylegend[0] != '\0') {
2759 Xvertical = im->text_prop[TEXT_PROP_UNIT].size * 2;
2763 if (im->title[0] != '\0') {
2764 /* The title is placed "inbetween" two text lines so it
2765 ** automatically has some vertical spacing. The horizontal
2766 ** spacing is added here, on each side.
2768 /* don't care for the with of the title
2769 Xtitle = gfx_get_text_width(im->canvas, 0,
2770 im->text_prop[TEXT_PROP_TITLE].font,
2771 im->text_prop[TEXT_PROP_TITLE].size,
2773 im->title, 0) + 2*Xspacing; */
2774 Ytitle = im->text_prop[TEXT_PROP_TITLE].size * 2.6 + 10;
2781 /* Now calculate the total size. Insert some spacing where
2782 desired. im->xorigin and im->yorigin need to correspond
2783 with the lower left corner of the main graph area or, if
2784 this one is not set, the imaginary box surrounding the
2787 /* The legend width cannot yet be determined, as a result we
2788 ** have problems adjusting the image to it. For now, we just
2789 ** forget about it at all; the legend will have to fit in the
2790 ** size already allocated.
2792 im->ximg = Xylabel + Xmain + 2 * Xspacing;
2795 im->ximg += Xspacing;
2797 im->xorigin = Xspacing + Xylabel;
2799 /* the length of the title should not influence with width of the graph
2800 if (Xtitle > im->ximg) im->ximg = Xtitle; */
2802 if (Xvertical) { /* unit description */
2803 im->ximg += Xvertical;
2804 im->xorigin += Xvertical;
2808 /* The vertical size is interesting... we need to compare
2809 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend, Ywatermark} with
2810 ** Yvertical however we need to know {Ytitle+Ymain+Yxlabel}
2811 ** in order to start even thinking about Ylegend or Ywatermark.
2813 ** Do it in three portions: First calculate the inner part,
2814 ** then do the legend, then adjust the total height of the img,
2815 ** adding space for a watermark if one exists;
2818 /* reserve space for main and/or pie */
2820 im->yimg = Ymain + Yxlabel;
2823 im->yorigin = im->yimg - Yxlabel;
2825 /* reserve space for the title *or* some padding above the graph */
2828 im->yorigin += Ytitle;
2830 im->yimg += 1.5 * Yspacing;
2831 im->yorigin += 1.5 * Yspacing;
2833 /* reserve space for padding below the graph */
2834 im->yimg += Yspacing;
2836 /* Determine where to place the legends onto the image.
2837 ** Adjust im->yimg to match the space requirements.
2839 if (leg_place(im, 0) == -1)
2842 if (im->watermark[0] != '\0') {
2843 im->yimg += Ywatermark;
2853 static cairo_status_t cairo_write_func_file(
2855 const unsigned char *data,
2856 unsigned int length)
2858 if (fwrite(data, length, 1, closure) != 1)
2859 return CAIRO_STATUS_WRITE_ERROR;
2860 return CAIRO_STATUS_SUCCESS;
2864 /* draw that picture thing ... */
2870 int lazy = lazy_check(im);
2872 double areazero = 0.0;
2873 graph_desc_t *lastgdes = NULL;
2875 PangoFontMap *font_map = pango_cairo_font_map_get_default();
2878 /* if we are lazy and there is nothing to PRINT ... quit now */
2879 if (lazy && im->prt_c == 0)
2882 /* pull the data from the rrd files ... */
2884 if (data_fetch(im) == -1)
2887 /* evaluate VDEF and CDEF operations ... */
2888 if (data_calc(im) == -1)
2892 /* calculate and PRINT and GPRINT definitions. We have to do it at
2893 * this point because it will affect the length of the legends
2894 * if there are no graph elements we stop here ...
2895 * if we are lazy, try to quit ...
2897 i = print_calc(im, calcpr);
2900 if ((i == 0) || lazy)
2903 /**************************************************************
2904 *** Calculating sizes and locations became a bit confusing ***
2905 *** so I moved this into a separate function. ***
2906 **************************************************************/
2907 if (graph_size_location(im, i) == -1)
2910 /* get actual drawing data and find min and max values */
2911 if (data_proc(im) == -1)
2914 if (!im->logarithmic) {
2917 /* identify si magnitude Kilo, Mega Giga ? */
2918 if (!im->rigid && !im->logarithmic)
2919 expand_range(im); /* make sure the upper and lower limit are
2922 if (!calc_horizontal_grid(im))
2929 apply_gridfit(im); */
2932 /* the actual graph is created by going through the individual
2933 graph elements and then drawing them */
2934 cairo_surface_destroy(im->surface);
2936 switch (im->imgformat) {
2939 cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
2940 im->ximg * im->zoom,
2941 im->yimg * im->zoom);
2946 cairo_pdf_surface_create(im->graphfile, im->ximg * im->zoom,
2947 im->yimg * im->zoom);
2952 cairo_ps_surface_create(im->graphfile, im->ximg * im->zoom,
2953 im->yimg * im->zoom);
2958 cairo_svg_surface_create(im->graphfile, im->ximg * im->zoom,
2959 im->yimg * im->zoom);
2960 cairo_svg_surface_restrict_to_version(im->surface,
2961 CAIRO_SVG_VERSION_1_1);
2964 im->cr = cairo_create(im->surface);
2965 pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(font_map), 100);
2966 cairo_set_antialias(im->cr, im->graph_antialias);
2967 cairo_scale(im->cr, im->zoom, im->zoom);
2971 0, im->yimg, im->ximg, im->yimg, im->graph_col[GRC_BACK]);
2973 gfx_add_point(im, im->ximg, 0);
2977 im->xorigin, im->yorigin,
2978 im->xorigin + im->xsize, im->yorigin,
2979 im->xorigin + im->xsize, im->yorigin - im->ysize,
2980 im->graph_col[GRC_CANVAS]);
2982 gfx_add_point(im, im->xorigin, im->yorigin - im->ysize);
2985 if (im->minval > 0.0)
2986 areazero = im->minval;
2987 if (im->maxval < 0.0)
2988 areazero = im->maxval;
2990 for (i = 0; i < im->gdes_c; i++) {
2991 switch (im->gdes[i].gf) {
3004 for (ii = 0; ii < im->xsize; ii++) {
3005 if (!isnan(im->gdes[i].p_data[ii]) &&
3006 im->gdes[i].p_data[ii] != 0.0) {
3007 if (im->gdes[i].yrule > 0) {
3009 im->xorigin + ii, im->yorigin,
3012 im->gdes[i].yrule * im->ysize, 1.0,
3014 } else if (im->gdes[i].yrule < 0) {
3017 im->yorigin - im->ysize,
3020 im->gdes[i].yrule) *
3021 im->ysize, 1.0, im->gdes[i].col);
3029 /* fix data points at oo and -oo */
3030 for (ii = 0; ii < im->xsize; ii++) {
3031 if (isinf(im->gdes[i].p_data[ii])) {
3032 if (im->gdes[i].p_data[ii] > 0) {
3033 im->gdes[i].p_data[ii] = im->maxval;
3035 im->gdes[i].p_data[ii] = im->minval;
3041 /* *******************************************************
3046 -------|--t-1--t--------------------------------
3048 if we know the value at time t was a then
3049 we draw a square from t-1 to t with the value a.
3051 ********************************************************* */
3052 if (im->gdes[i].col.alpha != 0.0) {
3053 /* GF_LINE and friend */
3054 if (im->gdes[i].gf == GF_LINE) {
3055 double last_y = 0.0;
3059 cairo_new_path(im->cr);
3061 cairo_set_line_width(im->cr, im->gdes[i].linewidth);
3062 for (ii = 1; ii < im->xsize; ii++) {
3063 if (isnan(im->gdes[i].p_data[ii])
3064 || (im->slopemode == 1
3065 && isnan(im->gdes[i].p_data[ii - 1]))) {
3070 last_y = ytr(im, im->gdes[i].p_data[ii]);
3071 if (im->slopemode == 0) {
3072 double x = ii - 1 + im->xorigin;
3075 gfx_line_fit(im, &x, &y);
3076 cairo_move_to(im->cr, x, y);
3077 x = ii + im->xorigin;
3079 gfx_line_fit(im, &x, &y);
3080 cairo_line_to(im->cr, x, y);
3082 double x = ii - 1 + im->xorigin;
3084 im->gdes[i].p_data[ii - 1]);
3086 gfx_line_fit(im, &x, &y);
3087 cairo_move_to(im->cr, x, y);
3088 x = ii + im->xorigin;
3090 gfx_line_fit(im, &x, &y);
3091 cairo_line_to(im->cr, x, y);
3095 double x1 = ii + im->xorigin;
3096 double y1 = ytr(im, im->gdes[i].p_data[ii]);
3098 if (im->slopemode == 0
3099 && !AlmostEqual2sComplement(y1, last_y, 4)) {
3100 double x = ii - 1 + im->xorigin;
3103 gfx_line_fit(im, &x, &y);
3104 cairo_line_to(im->cr, x, y);
3107 gfx_line_fit(im, &x1, &y1);
3108 cairo_line_to(im->cr, x1, y1);
3112 cairo_set_source_rgba(im->cr, im->gdes[i].col.red,
3113 im->gdes[i].col.green,
3114 im->gdes[i].col.blue,
3115 im->gdes[i].col.alpha);
3116 cairo_set_line_cap(im->cr, CAIRO_LINE_CAP_ROUND);
3117 cairo_set_line_join(im->cr, CAIRO_LINE_JOIN_ROUND);
3118 cairo_stroke(im->cr);
3119 cairo_restore(im->cr);
3122 double *foreY = malloc(sizeof(double) * im->xsize * 2);
3123 double *foreX = malloc(sizeof(double) * im->xsize * 2);
3124 double *backY = malloc(sizeof(double) * im->xsize * 2);
3125 double *backX = malloc(sizeof(double) * im->xsize * 2);
3128 for (ii = 0; ii <= im->xsize; ii++) {
3131 if (idxI > 0 && (drawem != 0 || ii == im->xsize)) {
3136 && AlmostEqual2sComplement(foreY[lastI],
3138 && AlmostEqual2sComplement(foreY[lastI],
3146 foreX[cntI], foreY[cntI],
3148 while (cntI < idxI) {
3153 AlmostEqual2sComplement(foreY[lastI],
3156 AlmostEqual2sComplement(foreY[lastI],
3161 gfx_add_point(im, foreX[cntI], foreY[cntI]);
3163 gfx_add_point(im, backX[idxI], backY[idxI]);
3169 AlmostEqual2sComplement(backY[lastI],
3172 AlmostEqual2sComplement(backY[lastI],
3177 gfx_add_point(im, backX[idxI], backY[idxI]);
3187 if (ii == im->xsize)
3190 if (im->slopemode == 0 && ii == 0) {
3193 if (isnan(im->gdes[i].p_data[ii])) {
3197 ytop = ytr(im, im->gdes[i].p_data[ii]);
3198 if (lastgdes && im->gdes[i].stack) {
3199 ybase = ytr(im, lastgdes->p_data[ii]);
3201 ybase = ytr(im, areazero);
3203 if (ybase == ytop) {
3209 double extra = ytop;
3214 if (im->slopemode == 0) {
3215 backY[++idxI] = ybase - 0.2;
3216 backX[idxI] = ii + im->xorigin - 1;
3217 foreY[idxI] = ytop + 0.2;
3218 foreX[idxI] = ii + im->xorigin - 1;
3220 backY[++idxI] = ybase - 0.2;
3221 backX[idxI] = ii + im->xorigin;
3222 foreY[idxI] = ytop + 0.2;
3223 foreX[idxI] = ii + im->xorigin;
3225 /* close up any remaining area */
3230 } /* else GF_LINE */
3232 /* if color != 0x0 */
3233 /* make sure we do not run into trouble when stacking on NaN */
3234 for (ii = 0; ii < im->xsize; ii++) {
3235 if (isnan(im->gdes[i].p_data[ii])) {
3236 if (lastgdes && (im->gdes[i].stack)) {
3237 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
3239 im->gdes[i].p_data[ii] = areazero;
3243 lastgdes = &(im->gdes[i]);
3247 ("STACK should already be turned into LINE or AREA here");
3254 /* grid_paint also does the text */
3255 if (!(im->extra_flags & ONLY_GRAPH))
3259 if (!(im->extra_flags & ONLY_GRAPH))
3262 /* the RULES are the last thing to paint ... */
3263 for (i = 0; i < im->gdes_c; i++) {
3265 switch (im->gdes[i].gf) {
3267 if (im->gdes[i].yrule >= im->minval
3268 && im->gdes[i].yrule <= im->maxval)
3270 im->xorigin, ytr(im, im->gdes[i].yrule),
3271 im->xorigin + im->xsize, ytr(im,
3273 1.0, im->gdes[i].col);
3276 if (im->gdes[i].xrule >= im->start
3277 && im->gdes[i].xrule <= im->end)
3279 xtr(im, im->gdes[i].xrule), im->yorigin,
3280 xtr(im, im->gdes[i].xrule),
3281 im->yorigin - im->ysize, 1.0, im->gdes[i].col);
3289 switch (im->imgformat) {
3292 cairo_status_t status;
3294 if (strcmp(im->graphfile, "-") == 0) {
3295 status = cairo_surface_write_to_png_stream(im->surface, &cairo_write_func_file, (void*)stdout);
3297 status = cairo_surface_write_to_png(im->surface, im->graphfile);
3300 if (status != CAIRO_STATUS_SUCCESS) {
3301 rrd_set_error("Could not save png to '%s'", im->graphfile);
3307 cairo_show_page(im->cr);
3314 /*****************************************************
3316 *****************************************************/
3323 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
3324 * sizeof(graph_desc_t))) ==
3326 rrd_set_error("realloc graph_descs");
3331 im->gdes[im->gdes_c - 1].step = im->step;
3332 im->gdes[im->gdes_c - 1].step_orig = im->step;
3333 im->gdes[im->gdes_c - 1].stack = 0;
3334 im->gdes[im->gdes_c - 1].linewidth = 0;
3335 im->gdes[im->gdes_c - 1].debug = 0;
3336 im->gdes[im->gdes_c - 1].start = im->start;
3337 im->gdes[im->gdes_c - 1].start_orig = im->start;
3338 im->gdes[im->gdes_c - 1].end = im->end;
3339 im->gdes[im->gdes_c - 1].end_orig = im->end;
3340 im->gdes[im->gdes_c - 1].vname[0] = '\0';
3341 im->gdes[im->gdes_c - 1].data = NULL;
3342 im->gdes[im->gdes_c - 1].ds_namv = NULL;
3343 im->gdes[im->gdes_c - 1].data_first = 0;
3344 im->gdes[im->gdes_c - 1].p_data = NULL;
3345 im->gdes[im->gdes_c - 1].rpnp = NULL;
3346 im->gdes[im->gdes_c - 1].shift = 0.0;
3347 im->gdes[im->gdes_c - 1].col.red = 0.0;
3348 im->gdes[im->gdes_c - 1].col.green = 0.0;
3349 im->gdes[im->gdes_c - 1].col.blue = 0.0;
3350 im->gdes[im->gdes_c - 1].col.alpha = 0.0;
3351 im->gdes[im->gdes_c - 1].legend[0] = '\0';
3352 im->gdes[im->gdes_c - 1].format[0] = '\0';
3353 im->gdes[im->gdes_c - 1].strftm = 0;
3354 im->gdes[im->gdes_c - 1].rrd[0] = '\0';
3355 im->gdes[im->gdes_c - 1].ds = -1;
3356 im->gdes[im->gdes_c - 1].cf_reduce = CF_AVERAGE;
3357 im->gdes[im->gdes_c - 1].cf = CF_AVERAGE;
3358 im->gdes[im->gdes_c - 1].p_data = NULL;
3359 im->gdes[im->gdes_c - 1].yrule = DNAN;
3360 im->gdes[im->gdes_c - 1].xrule = 0;
3364 /* copies input untill the first unescaped colon is found
3365 or until input ends. backslashes have to be escaped as well */
3367 const char *const input,
3373 for (inp = 0; inp < len && input[inp] != ':' && input[inp] != '\0'; inp++) {
3374 if (input[inp] == '\\' &&
3375 input[inp + 1] != '\0' &&
3376 (input[inp + 1] == '\\' || input[inp + 1] == ':')) {
3377 output[outp++] = input[++inp];
3379 output[outp++] = input[inp];
3382 output[outp] = '\0';
3386 /* Some surgery done on this function, it became ridiculously big.
3388 ** - initializing now in rrd_graph_init()
3389 ** - options parsing now in rrd_graph_options()
3390 ** - script parsing now in rrd_graph_script()
3404 rrd_graph_init(&im);
3406 /* a dummy surface so that we can measure text sizes for placements */
3407 im.surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 10);
3408 im.cr = cairo_create(im.surface);
3411 /* not currently using this ... */
3412 im.graphhandle = stream;
3414 rrd_graph_options(argc, argv, &im);
3415 if (rrd_test_error()) {
3420 if (strlen(argv[optind]) >= MAXPATH) {
3421 rrd_set_error("filename (including path) too long");
3425 strncpy(im.graphfile, argv[optind], MAXPATH - 1);
3426 im.graphfile[MAXPATH - 1] = '\0';
3428 rrd_graph_script(argc, argv, &im, 1);
3429 if (rrd_test_error()) {
3434 /* Everything is now read and the actual work can start */
3437 if (graph_paint(&im, prdata) == -1) {
3442 /* The image is generated and needs to be output.
3443 ** Also, if needed, print a line with information about the image.
3454 /* maybe prdata is not allocated yet ... lets do it now */
3455 if ((*prdata = calloc(2, sizeof(char *))) == NULL) {
3456 rrd_set_error("malloc imginfo");
3461 malloc((strlen(im.imginfo) + 200 +
3462 strlen(im.graphfile)) * sizeof(char)))
3464 rrd_set_error("malloc imginfo");
3467 filename = im.graphfile + strlen(im.graphfile);
3468 while (filename > im.graphfile) {
3469 if (*(filename - 1) == '/' || *(filename - 1) == '\\')
3474 sprintf((*prdata)[0], im.imginfo, filename,
3475 (long) (im.zoom * im.ximg), (long) (im.zoom * im.yimg));
3481 void rrd_graph_init(
3489 #ifdef HAVE_SETLOCALE
3490 setlocale(LC_TIME, "");
3491 #ifdef HAVE_MBSTOWCS
3492 setlocale(LC_CTYPE, "");
3498 im->xlab_user.minsec = -1;
3504 im->ylegend[0] = '\0';
3505 im->title[0] = '\0';
3506 im->watermark[0] = '\0';
3509 im->unitsexponent = 9999;
3510 im->unitslength = 6;
3511 im->forceleftspace = 0;
3513 im->viewfactor = 1.0;
3514 im->imgformat = IF_PNG;
3517 im->extra_flags = 0;
3523 im->logarithmic = 0;
3524 im->ygridstep = DNAN;
3525 im->draw_x_grid = 1;
3526 im->draw_y_grid = 1;
3531 im->grid_dash_on = 1;
3532 im->grid_dash_off = 1;
3533 im->tabwidth = 40.0;
3535 im->font_options = cairo_font_options_create();
3536 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
3538 cairo_font_options_set_hint_style(im->font_options,
3539 CAIRO_HINT_STYLE_FULL);
3540 cairo_font_options_set_hint_metrics(im->font_options,
3541 CAIRO_HINT_METRICS_ON);
3542 cairo_font_options_set_antialias(im->font_options, CAIRO_ANTIALIAS_GRAY);
3545 for (i = 0; i < DIM(graph_col); i++)
3546 im->graph_col[i] = graph_col[i];
3548 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
3551 char rrd_win_default_font[1000];
3553 windir = getenv("windir");
3554 /* %windir% is something like D:\windows or C:\winnt */
3555 if (windir != NULL) {
3556 strncpy(rrd_win_default_font, windir, 500);
3557 rrd_win_default_font[500] = '\0';
3558 strcat(rrd_win_default_font, "\\fonts\\");
3559 strcat(rrd_win_default_font, RRD_DEFAULT_FONT);
3560 for (i = 0; i < DIM(text_prop); i++) {
3561 strncpy(text_prop[i].font, rrd_win_default_font,
3562 sizeof(text_prop[i].font) - 1);
3563 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3571 deffont = getenv("RRD_DEFAULT_FONT");
3572 if (deffont != NULL) {
3573 for (i = 0; i < DIM(text_prop); i++) {
3574 strncpy(text_prop[i].font, deffont,
3575 sizeof(text_prop[i].font) - 1);
3576 text_prop[i].font[sizeof(text_prop[i].font) - 1] = '\0';
3580 for (i = 0; i < DIM(text_prop); i++) {
3581 im->text_prop[i].size = text_prop[i].size;
3582 strcpy(im->text_prop[i].font, text_prop[i].font);
3586 void rrd_graph_options(
3592 char *parsetime_error = NULL;
3593 char scan_gtm[12], scan_mtm[12], scan_ltm[12], col_nam[12];
3594 time_t start_tmp = 0, end_tmp = 0;
3596 struct rrd_time_value start_tv, end_tv;
3597 long unsigned int color;
3600 opterr = 0; /* initialize getopt */
3602 parsetime("end-24h", &start_tv);
3603 parsetime("now", &end_tv);
3605 /* defines for long options without a short equivalent. should be bytes,
3606 and may not collide with (the ASCII value of) short options */
3607 #define LONGOPT_UNITS_SI 255
3610 static struct option long_options[] = {
3611 {"start", required_argument, 0, 's'},
3612 {"end", required_argument, 0, 'e'},
3613 {"x-grid", required_argument, 0, 'x'},
3614 {"y-grid", required_argument, 0, 'y'},
3615 {"vertical-label", required_argument, 0, 'v'},
3616 {"width", required_argument, 0, 'w'},
3617 {"height", required_argument, 0, 'h'},
3618 {"full-size-mode", no_argument, 0, 'D'},
3619 {"interlaced", no_argument, 0, 'i'},
3620 {"upper-limit", required_argument, 0, 'u'},
3621 {"lower-limit", required_argument, 0, 'l'},
3622 {"rigid", no_argument, 0, 'r'},
3623 {"base", required_argument, 0, 'b'},
3624 {"logarithmic", no_argument, 0, 'o'},
3625 {"color", required_argument, 0, 'c'},
3626 {"font", required_argument, 0, 'n'},
3627 {"title", required_argument, 0, 't'},
3628 {"imginfo", required_argument, 0, 'f'},
3629 {"imgformat", required_argument, 0, 'a'},
3630 {"lazy", no_argument, 0, 'z'},
3631 {"zoom", required_argument, 0, 'm'},
3632 {"no-legend", no_argument, 0, 'g'},
3633 {"force-rules-legend", no_argument, 0, 'F'},
3634 {"only-graph", no_argument, 0, 'j'},
3635 {"alt-y-grid", no_argument, 0, 'Y'},
3636 {"no-minor", no_argument, 0, 'I'},
3637 {"slope-mode", no_argument, 0, 'E'},
3638 {"alt-autoscale", no_argument, 0, 'A'},
3639 {"alt-autoscale-min", no_argument, 0, 'J'},
3640 {"alt-autoscale-max", no_argument, 0, 'M'},
3641 {"no-gridfit", no_argument, 0, 'N'},
3642 {"units-exponent", required_argument, 0, 'X'},
3643 {"units-length", required_argument, 0, 'L'},
3644 {"units", required_argument, 0, LONGOPT_UNITS_SI},
3645 {"step", required_argument, 0, 'S'},
3646 {"tabwidth", required_argument, 0, 'T'},
3647 {"font-render-mode", required_argument, 0, 'R'},
3648 {"graph-render-mode", required_argument, 0, 'G'},
3649 {"font-smoothing-threshold", required_argument, 0, 'B'},
3650 {"watermark", required_argument, 0, 'W'},
3651 {"alt-y-mrtg", no_argument, 0, 1000}, /* this has no effect it is just here to save old apps from crashing when they use it */
3654 int option_index = 0;
3656 int col_start, col_end;
3658 opt = getopt_long(argc, argv,
3659 "s:e:x:y:v:w:h:D:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMEX:L:S:T:NR:B:W:",
3660 long_options, &option_index);
3667 im->extra_flags |= NOMINOR;
3670 im->extra_flags |= ALTYGRID;
3673 im->extra_flags |= ALTAUTOSCALE;
3676 im->extra_flags |= ALTAUTOSCALE_MIN;
3679 im->extra_flags |= ALTAUTOSCALE_MAX;
3682 im->extra_flags |= ONLY_GRAPH;
3685 im->extra_flags |= NOLEGEND;
3688 im->extra_flags |= FORCE_RULES_LEGEND;
3690 case LONGOPT_UNITS_SI:
3691 if (im->extra_flags & FORCE_UNITS) {
3692 rrd_set_error("--units can only be used once!");
3695 if (strcmp(optarg, "si") == 0)
3696 im->extra_flags |= FORCE_UNITS_SI;
3698 rrd_set_error("invalid argument for --units: %s", optarg);
3703 im->unitsexponent = atoi(optarg);
3706 im->unitslength = atoi(optarg);
3707 im->forceleftspace = 1;
3710 im->tabwidth = atof(optarg);
3713 im->step = atoi(optarg);
3719 if ((parsetime_error = parsetime(optarg, &start_tv))) {
3720 rrd_set_error("start time: %s", parsetime_error);
3725 if ((parsetime_error = parsetime(optarg, &end_tv))) {
3726 rrd_set_error("end time: %s", parsetime_error);
3731 if (strcmp(optarg, "none") == 0) {
3732 im->draw_x_grid = 0;
3737 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
3739 &im->xlab_user.gridst,
3741 &im->xlab_user.mgridst,
3743 &im->xlab_user.labst,
3744 &im->xlab_user.precis, &stroff) == 7 && stroff != 0) {
3745 strncpy(im->xlab_form, optarg + stroff,
3746 sizeof(im->xlab_form) - 1);
3747 im->xlab_form[sizeof(im->xlab_form) - 1] = '\0';
3748 if ((int) (im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1) {
3749 rrd_set_error("unknown keyword %s", scan_gtm);
3751 } else if ((int) (im->xlab_user.mgridtm = tmt_conv(scan_mtm))
3753 rrd_set_error("unknown keyword %s", scan_mtm);
3755 } else if ((int) (im->xlab_user.labtm = tmt_conv(scan_ltm)) ==
3757 rrd_set_error("unknown keyword %s", scan_ltm);
3760 im->xlab_user.minsec = 1;
3761 im->xlab_user.stst = im->xlab_form;
3763 rrd_set_error("invalid x-grid format");
3769 if (strcmp(optarg, "none") == 0) {
3770 im->draw_y_grid = 0;
3774 if (sscanf(optarg, "%lf:%d", &im->ygridstep, &im->ylabfact) == 2) {
3775 if (im->ygridstep <= 0) {
3776 rrd_set_error("grid step must be > 0");
3778 } else if (im->ylabfact < 1) {
3779 rrd_set_error("label factor must be > 0");
3783 rrd_set_error("invalid y-grid format");
3788 strncpy(im->ylegend, optarg, 150);
3789 im->ylegend[150] = '\0';
3792 im->maxval = atof(optarg);
3795 im->minval = atof(optarg);
3798 im->base = atol(optarg);
3799 if (im->base != 1024 && im->base != 1000) {
3801 ("the only sensible value for base apart from 1000 is 1024");
3806 long_tmp = atol(optarg);
3807 if (long_tmp < 10) {
3808 rrd_set_error("width below 10 pixels");
3811 im->xsize = long_tmp;
3814 long_tmp = atol(optarg);
3815 if (long_tmp < 10) {
3816 rrd_set_error("height below 10 pixels");
3819 im->ysize = long_tmp;
3822 im->extra_flags |= FULL_SIZE_MODE;
3825 /* interlaced png not supported at the moment */
3831 im->imginfo = optarg;
3834 if ((int) (im->imgformat = if_conv(optarg)) == -1) {
3835 rrd_set_error("unsupported graphics format '%s'", optarg);
3847 im->logarithmic = 1;
3851 "%10[A-Z]#%n%8lx%n",
3852 col_nam, &col_start, &color, &col_end) == 2) {
3854 int col_len = col_end - col_start;
3858 color = (((color & 0xF00) * 0x110000) |
3859 ((color & 0x0F0) * 0x011000) |
3860 ((color & 0x00F) * 0x001100) | 0x000000FF);
3863 color = (((color & 0xF000) * 0x11000) |
3864 ((color & 0x0F00) * 0x01100) |
3865 ((color & 0x00F0) * 0x00110) |
3866 ((color & 0x000F) * 0x00011)
3870 color = (color << 8) + 0xff /* shift left by 8 */ ;
3875 rrd_set_error("the color format is #RRGGBB[AA]");
3878 if ((ci = grc_conv(col_nam)) != -1) {
3879 im->graph_col[ci] = gfx_hex_to_col(color);
3881 rrd_set_error("invalid color name '%s'", col_nam);
3885 rrd_set_error("invalid color def format");
3892 char font[1024] = "";
3894 if (sscanf(optarg, "%10[A-Z]:%lf:%1000s", prop, &size, font) >= 2) {
3895 int sindex, propidx;
3897 if ((sindex = text_prop_conv(prop)) != -1) {
3898 for (propidx = sindex; propidx < TEXT_PROP_LAST;
3901 im->text_prop[propidx].size = size;
3903 if (strlen(font) > 0) {
3904 strcpy(im->text_prop[propidx].font, font);
3906 if (propidx == sindex && sindex != 0)
3910 rrd_set_error("invalid fonttag '%s'", prop);
3914 rrd_set_error("invalid text property format");
3920 im->zoom = atof(optarg);
3921 if (im->zoom <= 0.0) {
3922 rrd_set_error("zoom factor must be > 0");
3927 strncpy(im->title, optarg, 150);
3928 im->title[150] = '\0';
3932 if (strcmp(optarg, "normal") == 0) {
3933 cairo_font_options_set_antialias(im->font_options,
3934 CAIRO_ANTIALIAS_GRAY);
3935 cairo_font_options_set_hint_style(im->font_options,
3936 CAIRO_HINT_STYLE_FULL);
3937 } else if (strcmp(optarg, "light") == 0) {
3938 cairo_font_options_set_antialias(im->font_options,
3939 CAIRO_ANTIALIAS_GRAY);
3940 cairo_font_options_set_hint_style(im->font_options,
3941 CAIRO_HINT_STYLE_SLIGHT);
3942 } else if (strcmp(optarg, "mono") == 0) {
3943 cairo_font_options_set_antialias(im->font_options,
3944 CAIRO_ANTIALIAS_NONE);
3945 cairo_font_options_set_hint_style(im->font_options,
3946 CAIRO_HINT_STYLE_FULL);
3948 rrd_set_error("unknown font-render-mode '%s'", optarg);
3953 if (strcmp(optarg, "normal") == 0)
3954 im->graph_antialias = CAIRO_ANTIALIAS_GRAY;
3955 else if (strcmp(optarg, "mono") == 0)
3956 im->graph_antialias = CAIRO_ANTIALIAS_NONE;
3958 rrd_set_error("unknown graph-render-mode '%s'", optarg);
3963 /* not supported curently */
3967 strncpy(im->watermark, optarg, 100);
3968 im->watermark[99] = '\0';
3973 rrd_set_error("unknown option '%c'", optopt);
3975 rrd_set_error("unknown option '%s'", argv[optind - 1]);
3980 if (optind >= argc) {
3981 rrd_set_error("missing filename");
3985 if (im->logarithmic == 1 && im->minval <= 0) {
3987 ("for a logarithmic yaxis you must specify a lower-limit > 0");
3991 if (proc_start_end(&start_tv, &end_tv, &start_tmp, &end_tmp) == -1) {
3992 /* error string is set in parsetime.c */
3996 if (start_tmp < 3600 * 24 * 365 * 10) {
3997 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",
4002 if (end_tmp < start_tmp) {
4003 rrd_set_error("start (%ld) should be less than end (%ld)",
4004 start_tmp, end_tmp);
4008 im->start = start_tmp;
4010 im->step = max((long) im->step, (im->end - im->start) / im->xsize);
4013 int rrd_graph_color(
4020 graph_desc_t *gdp = &im->gdes[im->gdes_c - 1];
4022 color = strstr(var, "#");
4023 if (color == NULL) {
4024 if (optional == 0) {
4025 rrd_set_error("Found no color in %s", err);
4032 long unsigned int col;
4034 rest = strstr(color, ":");
4042 sscanf(color, "#%6lx%n", &col, &n);
4043 col = (col << 8) + 0xff /* shift left by 8 */ ;
4045 rrd_set_error("Color problem in %s", err);
4048 sscanf(color, "#%8lx%n", &col, &n);
4052 rrd_set_error("Color problem in %s", err);
4054 if (rrd_test_error())
4056 gdp->col = gfx_hex_to_col(col);
4069 while (*ptr != '\0')
4070 if (*ptr++ == '%') {
4072 /* line cannot end with percent char */
4076 /* '%s', '%S' and '%%' are allowed */
4077 if (*ptr == 's' || *ptr == 'S' || *ptr == '%')
4080 /* %c is allowed (but use only with vdef!) */
4081 else if (*ptr == 'c') {
4086 /* or else '% 6.2lf' and such are allowed */
4088 /* optional padding character */
4089 if (*ptr == ' ' || *ptr == '+' || *ptr == '-')
4092 /* This should take care of 'm.n' with all three optional */
4093 while (*ptr >= '0' && *ptr <= '9')
4097 while (*ptr >= '0' && *ptr <= '9')
4100 /* Either 'le', 'lf' or 'lg' must follow here */
4103 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g')
4118 struct graph_desc_t *gdes;
4119 const char *const str;
4121 /* A VDEF currently is either "func" or "param,func"
4122 * so the parsing is rather simple. Change if needed.
4129 sscanf(str, "%le,%29[A-Z]%n", ¶m, func, &n);
4130 if (n == (int) strlen(str)) { /* matched */
4134 sscanf(str, "%29[A-Z]%n", func, &n);
4135 if (n == (int) strlen(str)) { /* matched */
4138 rrd_set_error("Unknown function string '%s' in VDEF '%s'", str,
4143 if (!strcmp("PERCENT", func))
4144 gdes->vf.op = VDEF_PERCENT;
4145 else if (!strcmp("MAXIMUM", func))
4146 gdes->vf.op = VDEF_MAXIMUM;
4147 else if (!strcmp("AVERAGE", func))
4148 gdes->vf.op = VDEF_AVERAGE;
4149 else if (!strcmp("MINIMUM", func))
4150 gdes->vf.op = VDEF_MINIMUM;
4151 else if (!strcmp("TOTAL", func))
4152 gdes->vf.op = VDEF_TOTAL;
4153 else if (!strcmp("FIRST", func))
4154 gdes->vf.op = VDEF_FIRST;
4155 else if (!strcmp("LAST", func))
4156 gdes->vf.op = VDEF_LAST;
4157 else if (!strcmp("LSLSLOPE", func))
4158 gdes->vf.op = VDEF_LSLSLOPE;
4159 else if (!strcmp("LSLINT", func))
4160 gdes->vf.op = VDEF_LSLINT;
4161 else if (!strcmp("LSLCORREL", func))
4162 gdes->vf.op = VDEF_LSLCORREL;
4164 rrd_set_error("Unknown function '%s' in VDEF '%s'\n", func,
4169 switch (gdes->vf.op) {
4171 if (isnan(param)) { /* no parameter given */
4172 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n",
4176 if (param >= 0.0 && param <= 100.0) {
4177 gdes->vf.param = param;
4178 gdes->vf.val = DNAN; /* undefined */
4179 gdes->vf.when = 0; /* undefined */
4181 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n", param,
4194 case VDEF_LSLCORREL:
4196 gdes->vf.param = DNAN;
4197 gdes->vf.val = DNAN;
4200 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n",
4216 graph_desc_t *src, *dst;
4220 dst = &im->gdes[gdi];
4221 src = &im->gdes[dst->vidx];
4222 data = src->data + src->ds;
4223 steps = (src->end - src->start) / src->step;
4226 printf("DEBUG: start == %lu, end == %lu, %lu steps\n", src->start,
4230 switch (dst->vf.op) {
4236 if ((array = malloc(steps * sizeof(double))) == NULL) {
4237 rrd_set_error("malloc VDEV_PERCENT");
4240 for (step = 0; step < steps; step++) {
4241 array[step] = data[step * src->ds_cnt];
4243 qsort(array, step, sizeof(double), vdef_percent_compar);
4245 field = (steps - 1) * dst->vf.param / 100;
4246 dst->vf.val = array[field];
4247 dst->vf.when = 0; /* no time component */
4250 for (step = 0; step < steps; step++)
4251 printf("DEBUG: %3li:%10.2f %c\n", step, array[step],
4252 step == field ? '*' : ' ');
4258 while (step != steps && isnan(data[step * src->ds_cnt]))
4260 if (step == steps) {
4264 dst->vf.val = data[step * src->ds_cnt];
4265 dst->vf.when = src->start + (step + 1) * src->step;
4267 while (step != steps) {
4268 if (finite(data[step * src->ds_cnt])) {
4269 if (data[step * src->ds_cnt] > dst->vf.val) {
4270 dst->vf.val = data[step * src->ds_cnt];
4271 dst->vf.when = src->start + (step + 1) * src->step;
4282 for (step = 0; step < steps; step++) {
4283 if (finite(data[step * src->ds_cnt])) {
4284 sum += data[step * src->ds_cnt];
4289 if (dst->vf.op == VDEF_TOTAL) {
4290 dst->vf.val = sum * src->step;
4291 dst->vf.when = 0; /* no time component */
4293 dst->vf.val = sum / cnt;
4294 dst->vf.when = 0; /* no time component */
4304 while (step != steps && isnan(data[step * src->ds_cnt]))
4306 if (step == steps) {
4310 dst->vf.val = data[step * src->ds_cnt];
4311 dst->vf.when = src->start + (step + 1) * src->step;
4313 while (step != steps) {
4314 if (finite(data[step * src->ds_cnt])) {
4315 if (data[step * src->ds_cnt] < dst->vf.val) {
4316 dst->vf.val = data[step * src->ds_cnt];
4317 dst->vf.when = src->start + (step + 1) * src->step;
4324 /* The time value returned here is one step before the
4325 * actual time value. This is the start of the first
4329 while (step != steps && isnan(data[step * src->ds_cnt]))
4331 if (step == steps) { /* all entries were NaN */
4335 dst->vf.val = data[step * src->ds_cnt];
4336 dst->vf.when = src->start + step * src->step;
4340 /* The time value returned here is the
4341 * actual time value. This is the end of the last
4345 while (step >= 0 && isnan(data[step * src->ds_cnt]))
4347 if (step < 0) { /* all entries were NaN */
4351 dst->vf.val = data[step * src->ds_cnt];
4352 dst->vf.when = src->start + (step + 1) * src->step;
4357 case VDEF_LSLCORREL:{
4358 /* Bestfit line by linear least squares method */
4361 double SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
4369 for (step = 0; step < steps; step++) {
4370 if (finite(data[step * src->ds_cnt])) {
4373 SUMxx += step * step;
4374 SUMxy += step * data[step * src->ds_cnt];
4375 SUMy += data[step * src->ds_cnt];
4376 SUMyy += data[step * src->ds_cnt] * data[step * src->ds_cnt];
4380 slope = (SUMx * SUMy - cnt * SUMxy) / (SUMx * SUMx - cnt * SUMxx);
4381 y_intercept = (SUMy - slope * SUMx) / cnt;
4384 (SUMx * SUMy) / cnt) / sqrt((SUMxx -
4385 (SUMx * SUMx) / cnt) * (SUMyy -
4391 if (dst->vf.op == VDEF_LSLSLOPE) {
4392 dst->vf.val = slope;
4394 } else if (dst->vf.op == VDEF_LSLINT) {
4395 dst->vf.val = y_intercept;
4397 } else if (dst->vf.op == VDEF_LSLCORREL) {
4398 dst->vf.val = correl;
4412 /* NaN < -INF < finite_values < INF */
4413 int vdef_percent_compar(
4418 /* Equality is not returned; this doesn't hurt except
4419 * (maybe) for a little performance.
4422 /* First catch NaN values. They are smallest */
4423 if (isnan(*(double *) a))
4425 if (isnan(*(double *) b))
4428 /* NaN doesn't reach this part so INF and -INF are extremes.
4429 * The sign from isinf() is compatible with the sign we return
4431 if (isinf(*(double *) a))
4432 return isinf(*(double *) a);
4433 if (isinf(*(double *) b))
4434 return isinf(*(double *) b);
4436 /* If we reach this, both values must be finite */
4437 if (*(double *) a < *(double *) b)