1 /****************************************************************************
2 * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
3 ****************************************************************************
4 * rrd__graph.c make creates ne rrds
5 ****************************************************************************/
25 #include "rrd_graph.h"
27 /* some constant definitions */
31 char rrd_win_default_font[80];
34 #ifndef RRD_DEFAULT_FONT
36 #define RRD_DEFAULT_FONT "VeraMono.ttf"
37 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/openoffice/ariosor.ttf" */
38 /* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/Arial.ttf" */
42 text_prop_t text_prop[] = {
43 { 10.0, RRD_DEFAULT_FONT }, /* default */
44 { 10.0, RRD_DEFAULT_FONT }, /* title */
45 { 8.0, RRD_DEFAULT_FONT }, /* axis */
46 { 10.0, RRD_DEFAULT_FONT }, /* unit */
47 { 10.0, RRD_DEFAULT_FONT } /* legend */
51 {0, TMT_SECOND,30, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
52 {2, TMT_MINUTE,1, TMT_MINUTE,5, TMT_MINUTE,5, 0,"%H:%M"},
53 {5, TMT_MINUTE,2, TMT_MINUTE,10, TMT_MINUTE,10, 0,"%H:%M"},
54 {10, TMT_MINUTE,5, TMT_MINUTE,20, TMT_MINUTE,20, 0,"%H:%M"},
55 {30, TMT_MINUTE,10, TMT_HOUR,1, TMT_HOUR,1, 0,"%H:%M"},
56 {60, TMT_MINUTE,30, TMT_HOUR,2, TMT_HOUR,2, 0,"%H:%M"},
57 {180, TMT_HOUR,1, TMT_HOUR,6, TMT_HOUR,6, 0,"%H:%M"},
58 /*{300, TMT_HOUR,3, TMT_HOUR,12, TMT_HOUR,12, 12*3600,"%a %p"}, this looks silly*/
59 {600, TMT_HOUR,6, TMT_DAY,1, TMT_DAY,1, 24*3600,"%a"},
60 {1800, TMT_HOUR,12, TMT_DAY,1, TMT_DAY,2, 24*3600,"%a"},
61 {3600, TMT_DAY,1, TMT_WEEK,1, TMT_WEEK,1, 7*24*3600,"Week %V"},
62 {3*3600, TMT_WEEK,1, TMT_MONTH,1, TMT_WEEK,2, 7*24*3600,"Week %V"},
63 {6*3600, TMT_MONTH,1, TMT_MONTH,1, TMT_MONTH,1, 30*24*3600,"%b"},
64 {48*3600, TMT_MONTH,1, TMT_MONTH,3, TMT_MONTH,3, 30*24*3600,"%b"},
65 {10*24*3600, TMT_YEAR,1, TMT_YEAR,1, TMT_YEAR,1, 365*24*3600,"%y"},
66 {-1,TMT_MONTH,0,TMT_MONTH,0,TMT_MONTH,0,0,""}
69 /* sensible logarithmic y label intervals ...
70 the first element of each row defines the possible starting points on the
71 y axis ... the other specify the */
73 double yloglab[][12]= {{ 1e9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
74 { 1e3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
75 { 1e1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
76 /* { 1e1, 1, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, */
77 { 1e1, 1, 2.5, 5, 7.5, 0, 0, 0, 0, 0, 0, 0 },
78 { 1e1, 1, 2, 4, 6, 8, 0, 0, 0, 0, 0, 0 },
79 { 1e1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0 },
80 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }};
82 /* sensible y label intervals ...*/
100 gfx_color_t graph_col[] = /* default colors */
101 { 0xFFFFFFFF, /* canvas */
102 0xF0F0F0FF, /* background */
103 0xD0D0D0FF, /* shade A */
104 0xA0A0A0FF, /* shade B */
105 0x909090FF, /* grid */
106 0xE05050FF, /* major grid */
107 0x000000FF, /* font */
108 0x000000FF, /* frame */
109 0xFF0000FF /* arrow */
116 # define DPRINT(x) (void)(printf x, printf("\n"))
122 /* initialize with xtr(im,0); */
124 xtr(image_desc_t *im,time_t mytime){
127 pixie = (double) im->xsize / (double)(im->end - im->start);
130 return (int)((double)im->xorigin
131 + pixie * ( mytime - im->start ) );
134 /* translate data values into y coordinates */
136 ytr(image_desc_t *im, double value){
141 pixie = (double) im->ysize / (im->maxval - im->minval);
143 pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
145 } else if(!im->logarithmic) {
146 yval = im->yorigin - pixie * (value - im->minval);
148 if (value < im->minval) {
151 yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
154 /* make sure we don't return anything too unreasonable. GD lib can
155 get terribly slow when drawing lines outside its scope. This is
156 especially problematic in connection with the rigid option */
158 /* keep yval as-is */
159 } else if (yval > im->yorigin) {
160 yval = im->yorigin+2;
161 } else if (yval < im->yorigin - im->ysize){
162 yval = im->yorigin - im->ysize - 2;
169 /* conversion function for symbolic entry names */
172 #define conv_if(VV,VVV) \
173 if (strcmp(#VV, string) == 0) return VVV ;
175 enum gf_en gf_conv(char *string){
177 conv_if(PRINT,GF_PRINT)
178 conv_if(GPRINT,GF_GPRINT)
179 conv_if(COMMENT,GF_COMMENT)
180 conv_if(HRULE,GF_HRULE)
181 conv_if(VRULE,GF_VRULE)
182 conv_if(LINE,GF_LINE)
183 conv_if(AREA,GF_AREA)
184 conv_if(STACK,GF_STACK)
185 conv_if(TICK,GF_TICK)
187 conv_if(CDEF,GF_CDEF)
188 conv_if(VDEF,GF_VDEF)
189 conv_if(PART,GF_PART)
190 conv_if(XPORT,GF_XPORT)
191 conv_if(SHIFT,GF_SHIFT)
196 enum gfx_if_en if_conv(char *string){
206 enum tmt_en tmt_conv(char *string){
208 conv_if(SECOND,TMT_SECOND)
209 conv_if(MINUTE,TMT_MINUTE)
210 conv_if(HOUR,TMT_HOUR)
212 conv_if(WEEK,TMT_WEEK)
213 conv_if(MONTH,TMT_MONTH)
214 conv_if(YEAR,TMT_YEAR)
218 enum grc_en grc_conv(char *string){
220 conv_if(BACK,GRC_BACK)
221 conv_if(CANVAS,GRC_CANVAS)
222 conv_if(SHADEA,GRC_SHADEA)
223 conv_if(SHADEB,GRC_SHADEB)
224 conv_if(GRID,GRC_GRID)
225 conv_if(MGRID,GRC_MGRID)
226 conv_if(FONT,GRC_FONT)
227 conv_if(FRAME,GRC_FRAME)
228 conv_if(ARROW,GRC_ARROW)
233 enum text_prop_en text_prop_conv(char *string){
235 conv_if(DEFAULT,TEXT_PROP_DEFAULT)
236 conv_if(TITLE,TEXT_PROP_TITLE)
237 conv_if(AXIS,TEXT_PROP_AXIS)
238 conv_if(UNIT,TEXT_PROP_UNIT)
239 conv_if(LEGEND,TEXT_PROP_LEGEND)
247 im_free(image_desc_t *im)
251 if (im == NULL) return 0;
252 for(i=0;i<(unsigned)im->gdes_c;i++){
253 if (im->gdes[i].data_first){
254 /* careful here, because a single pointer can occur several times */
255 free (im->gdes[i].data);
256 if (im->gdes[i].ds_namv){
257 for (ii=0;ii<im->gdes[i].ds_cnt;ii++)
258 free(im->gdes[i].ds_namv[ii]);
259 free(im->gdes[i].ds_namv);
262 free (im->gdes[i].p_data);
263 free (im->gdes[i].rpnp);
266 gfx_destroy(im->canvas);
270 /* find SI magnitude symbol for the given number*/
273 image_desc_t *im, /* image description */
280 char *symbol[] = {"a", /* 10e-18 Atto */
281 "f", /* 10e-15 Femto */
282 "p", /* 10e-12 Pico */
283 "n", /* 10e-9 Nano */
284 "u", /* 10e-6 Micro */
285 "m", /* 10e-3 Milli */
290 "T", /* 10e12 Tera */
291 "P", /* 10e15 Peta */
297 if (*value == 0.0 || isnan(*value) ) {
301 sindex = floor(log(fabs(*value))/log((double)im->base));
302 *magfact = pow((double)im->base, (double)sindex);
303 (*value) /= (*magfact);
305 if ( sindex <= symbcenter && sindex >= -symbcenter) {
306 (*symb_ptr) = symbol[sindex+symbcenter];
314 /* find SI magnitude symbol for the numbers on the y-axis*/
317 image_desc_t *im /* image description */
321 char symbol[] = {'a', /* 10e-18 Atto */
322 'f', /* 10e-15 Femto */
323 'p', /* 10e-12 Pico */
324 'n', /* 10e-9 Nano */
325 'u', /* 10e-6 Micro */
326 'm', /* 10e-3 Milli */
331 'T', /* 10e12 Tera */
332 'P', /* 10e15 Peta */
338 if (im->unitsexponent != 9999) {
339 /* unitsexponent = 9, 6, 3, 0, -3, -6, -9, etc */
340 digits = floor(im->unitsexponent / 3);
342 digits = floor( log( max( fabs(im->minval),fabs(im->maxval)))/log((double)im->base));
344 im->magfact = pow((double)im->base , digits);
347 printf("digits %6.3f im->magfact %6.3f\n",digits,im->magfact);
350 if ( ((digits+symbcenter) < sizeof(symbol)) &&
351 ((digits+symbcenter) >= 0) )
352 im->symbol = symbol[(int)digits+symbcenter];
357 /* move min and max values around to become sensible */
360 expand_range(image_desc_t *im)
362 double sensiblevalues[] ={1000.0,900.0,800.0,750.0,700.0,
363 600.0,500.0,400.0,300.0,250.0,
364 200.0,125.0,100.0,90.0,80.0,
365 75.0,70.0,60.0,50.0,40.0,30.0,
366 25.0,20.0,10.0,9.0,8.0,
367 7.0,6.0,5.0,4.0,3.5,3.0,
368 2.5,2.0,1.8,1.5,1.2,1.0,
369 0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1,0.0,-1};
371 double scaled_min,scaled_max;
378 printf("Min: %6.2f Max: %6.2f MagFactor: %6.2f\n",
379 im->minval,im->maxval,im->magfact);
382 if (isnan(im->ygridstep)){
383 if(im->extra_flags & ALTAUTOSCALE) {
384 /* measure the amplitude of the function. Make sure that
385 graph boundaries are slightly higher then max/min vals
386 so we can see amplitude on the graph */
389 delt = im->maxval - im->minval;
391 fact = 2.0 * pow(10.0,
392 floor(log10(max(fabs(im->minval), fabs(im->maxval)))) - 2);
394 adj = (fact - delt) * 0.55;
396 printf("Min: %6.2f Max: %6.2f delt: %6.2f fact: %6.2f adj: %6.2f\n", im->minval, im->maxval, delt, fact, adj);
402 else if(im->extra_flags & ALTAUTOSCALE_MAX) {
403 /* measure the amplitude of the function. Make sure that
404 graph boundaries are slightly higher than max vals
405 so we can see amplitude on the graph */
406 adj = (im->maxval - im->minval) * 0.1;
410 scaled_min = im->minval / im->magfact;
411 scaled_max = im->maxval / im->magfact;
413 for (i=1; sensiblevalues[i] > 0; i++){
414 if (sensiblevalues[i-1]>=scaled_min &&
415 sensiblevalues[i]<=scaled_min)
416 im->minval = sensiblevalues[i]*(im->magfact);
418 if (-sensiblevalues[i-1]<=scaled_min &&
419 -sensiblevalues[i]>=scaled_min)
420 im->minval = -sensiblevalues[i-1]*(im->magfact);
422 if (sensiblevalues[i-1] >= scaled_max &&
423 sensiblevalues[i] <= scaled_max)
424 im->maxval = sensiblevalues[i-1]*(im->magfact);
426 if (-sensiblevalues[i-1]<=scaled_max &&
427 -sensiblevalues[i] >=scaled_max)
428 im->maxval = -sensiblevalues[i]*(im->magfact);
432 /* adjust min and max to the grid definition if there is one */
433 im->minval = (double)im->ylabfact * im->ygridstep *
434 floor(im->minval / ((double)im->ylabfact * im->ygridstep));
435 im->maxval = (double)im->ylabfact * im->ygridstep *
436 ceil(im->maxval /( (double)im->ylabfact * im->ygridstep));
440 fprintf(stderr,"SCALED Min: %6.2f Max: %6.2f Factor: %6.2f\n",
441 im->minval,im->maxval,im->magfact);
446 apply_gridfit(image_desc_t *im)
448 if (isnan(im->minval) || isnan(im->maxval))
451 if (im->logarithmic) {
452 double ya, yb, ypix, ypixfrac;
453 double log10_range = log10(im->maxval) - log10(im->minval);
454 ya = pow((double)10, floor(log10(im->minval)));
455 while (ya < im->minval)
458 return; /* don't have y=10^x gridline */
460 if (yb <= im->maxval) {
461 /* we have at least 2 y=10^x gridlines.
462 Make sure distance between them in pixels
463 are an integer by expanding im->maxval */
464 double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
465 double factor = y_pixel_delta / floor(y_pixel_delta);
466 double new_log10_range = factor * log10_range;
467 double new_ymax_log10 = log10(im->minval) + new_log10_range;
468 im->maxval = pow(10, new_ymax_log10);
469 ytr(im, DNAN); /* reset precalc */
470 log10_range = log10(im->maxval) - log10(im->minval);
472 /* make sure first y=10^x gridline is located on
473 integer pixel position by moving scale slightly
474 downwards (sub-pixel movement) */
475 ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
476 ypixfrac = ypix - floor(ypix);
477 if (ypixfrac > 0 && ypixfrac < 1) {
478 double yfrac = ypixfrac / im->ysize;
479 im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
480 im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
481 ytr(im, DNAN); /* reset precalc */
484 /* Make sure we have an integer pixel distance between
485 each minor gridline */
486 double ypos1 = ytr(im, im->minval);
487 double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
488 double y_pixel_delta = ypos1 - ypos2;
489 double factor = y_pixel_delta / floor(y_pixel_delta);
490 double new_range = factor * (im->maxval - im->minval);
491 double gridstep = im->ygrid_scale.gridstep;
492 double minor_y, minor_y_px, minor_y_px_frac;
493 im->maxval = im->minval + new_range;
494 ytr(im, DNAN); /* reset precalc */
495 /* make sure first minor gridline is on integer pixel y coord */
496 minor_y = gridstep * floor(im->minval / gridstep);
497 while (minor_y < im->minval)
499 minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
500 minor_y_px_frac = minor_y_px - floor(minor_y_px);
501 if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
502 double yfrac = minor_y_px_frac / im->ysize;
503 double range = im->maxval - im->minval;
504 im->minval = im->minval - yfrac * range;
505 im->maxval = im->maxval - yfrac * range;
506 ytr(im, DNAN); /* reset precalc */
508 calc_horizontal_grid(im); /* recalc with changed im->maxval */
512 /* reduce data reimplementation by Alex */
516 enum cf_en cf, /* which consolidation function ?*/
517 unsigned long cur_step, /* step the data currently is in */
518 time_t *start, /* start, end and step as requested ... */
519 time_t *end, /* ... by the application will be ... */
520 unsigned long *step, /* ... adjusted to represent reality */
521 unsigned long *ds_cnt, /* number of data sources in file */
522 rrd_value_t **data) /* two dimensional array containing the data */
524 int i,reduce_factor = ceil((double)(*step) / (double)cur_step);
525 unsigned long col,dst_row,row_cnt,start_offset,end_offset,skiprows=0;
526 rrd_value_t *srcptr,*dstptr;
528 (*step) = cur_step*reduce_factor; /* set new step size for reduced data */
531 row_cnt = ((*end)-(*start))/cur_step;
537 printf("Reducing %lu rows with factor %i time %lu to %lu, step %lu\n",
538 row_cnt,reduce_factor,*start,*end,cur_step);
539 for (col=0;col<row_cnt;col++) {
540 printf("time %10lu: ",*start+(col+1)*cur_step);
541 for (i=0;i<*ds_cnt;i++)
542 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
547 /* We have to combine [reduce_factor] rows of the source
548 ** into one row for the destination. Doing this we also
549 ** need to take care to combine the correct rows. First
550 ** alter the start and end time so that they are multiples
551 ** of the new step time. We cannot reduce the amount of
552 ** time so we have to move the end towards the future and
553 ** the start towards the past.
555 end_offset = (*end) % (*step);
556 start_offset = (*start) % (*step);
558 /* If there is a start offset (which cannot be more than
559 ** one destination row), skip the appropriate number of
560 ** source rows and one destination row. The appropriate
561 ** number is what we do know (start_offset/cur_step) of
562 ** the new interval (*step/cur_step aka reduce_factor).
565 printf("start_offset: %lu end_offset: %lu\n",start_offset,end_offset);
566 printf("row_cnt before: %lu\n",row_cnt);
569 (*start) = (*start)-start_offset;
570 skiprows=reduce_factor-start_offset/cur_step;
571 srcptr+=skiprows* *ds_cnt;
572 for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
576 printf("row_cnt between: %lu\n",row_cnt);
579 /* At the end we have some rows that are not going to be
580 ** used, the amount is end_offset/cur_step
583 (*end) = (*end)-end_offset+(*step);
584 skiprows = end_offset/cur_step;
588 printf("row_cnt after: %lu\n",row_cnt);
591 /* Sanity check: row_cnt should be multiple of reduce_factor */
592 /* if this gets triggered, something is REALLY WRONG ... we die immediately */
594 if (row_cnt%reduce_factor) {
595 printf("SANITY CHECK: %lu rows cannot be reduced by %i \n",
596 row_cnt,reduce_factor);
597 printf("BUG in reduce_data()\n");
601 /* Now combine reduce_factor intervals at a time
602 ** into one interval for the destination.
605 for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
606 for (col=0;col<(*ds_cnt);col++) {
607 rrd_value_t newval=DNAN;
608 unsigned long validval=0;
610 for (i=0;i<reduce_factor;i++) {
611 if (isnan(srcptr[i*(*ds_cnt)+col])) {
615 if (isnan(newval)) newval = srcptr[i*(*ds_cnt)+col];
623 newval += srcptr[i*(*ds_cnt)+col];
626 newval = min (newval,srcptr[i*(*ds_cnt)+col]);
629 /* an interval contains a failure if any subintervals contained a failure */
631 newval = max (newval,srcptr[i*(*ds_cnt)+col]);
634 newval = srcptr[i*(*ds_cnt)+col];
639 if (validval == 0){newval = DNAN;} else{
657 srcptr+=(*ds_cnt)*reduce_factor;
658 row_cnt-=reduce_factor;
660 /* If we had to alter the endtime, we didn't have enough
661 ** source rows to fill the last row. Fill it with NaN.
663 if (end_offset) for (col=0;col<(*ds_cnt);col++) *dstptr++ = DNAN;
665 row_cnt = ((*end)-(*start))/ *step;
667 printf("Done reducing. Currently %lu rows, time %lu to %lu, step %lu\n",
668 row_cnt,*start,*end,*step);
669 for (col=0;col<row_cnt;col++) {
670 printf("time %10lu: ",*start+(col+1)*(*step));
671 for (i=0;i<*ds_cnt;i++)
672 printf(" %8.2e",srcptr[*ds_cnt*col+i]);
679 /* get the data required for the graphs from the
683 data_fetch(image_desc_t *im )
688 /* pull the data from the log files ... */
689 for (i=0;i< (int)im->gdes_c;i++){
690 /* only GF_DEF elements fetch data */
691 if (im->gdes[i].gf != GF_DEF)
695 /* do we have it already ?*/
696 for (ii=0;ii<i;ii++) {
697 if (im->gdes[ii].gf != GF_DEF)
699 if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
700 && (im->gdes[i].cf == im->gdes[ii].cf)
701 && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
702 && (im->gdes[i].start == im->gdes[ii].start)
703 && (im->gdes[i].end == im->gdes[ii].end)
704 && (im->gdes[i].step == im->gdes[ii].step)) {
705 /* OK, the data is already there.
706 ** Just copy the header portion
708 im->gdes[i].start = im->gdes[ii].start;
709 im->gdes[i].end = im->gdes[ii].end;
710 im->gdes[i].step = im->gdes[ii].step;
711 im->gdes[i].ds_cnt = im->gdes[ii].ds_cnt;
712 im->gdes[i].ds_namv = im->gdes[ii].ds_namv;
713 im->gdes[i].data = im->gdes[ii].data;
714 im->gdes[i].data_first = 0;
721 unsigned long ft_step = im->gdes[i].step ;
723 if((rrd_fetch_fn(im->gdes[i].rrd,
729 &im->gdes[i].ds_namv,
730 &im->gdes[i].data)) == -1){
733 im->gdes[i].data_first = 1;
734 im->gdes[i].step = im->step;
736 if (ft_step < im->gdes[i].step) {
737 reduce_data(im->gdes[i].cf_reduce,
745 im->gdes[i].step = ft_step;
749 /* lets see if the required data source is really there */
750 for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
751 if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
754 if (im->gdes[i].ds== -1){
755 rrd_set_error("No DS called '%s' in '%s'",
756 im->gdes[i].ds_nam,im->gdes[i].rrd);
764 /* evaluate the expressions in the CDEF functions */
766 /*************************************************************
768 *************************************************************/
771 find_var_wrapper(void *arg1, char *key)
773 return find_var((image_desc_t *) arg1, key);
776 /* find gdes containing var*/
778 find_var(image_desc_t *im, char *key){
780 for(ii=0;ii<im->gdes_c-1;ii++){
781 if((im->gdes[ii].gf == GF_DEF
782 || im->gdes[ii].gf == GF_VDEF
783 || im->gdes[ii].gf == GF_CDEF)
784 && (strcmp(im->gdes[ii].vname,key) == 0)){
791 /* find the largest common denominator for all the numbers
792 in the 0 terminated num array */
797 for (i=0;num[i+1]!=0;i++){
799 rest=num[i] % num[i+1];
800 num[i]=num[i+1]; num[i+1]=rest;
804 /* return i==0?num[i]:num[i-1]; */
808 /* run the rpn calculator on all the VDEF and CDEF arguments */
810 data_calc( image_desc_t *im){
814 long *steparray, rpi;
819 rpnstack_init(&rpnstack);
821 for (gdi=0;gdi<im->gdes_c;gdi++){
822 /* Look for GF_VDEF and GF_CDEF in the same loop,
823 * so CDEFs can use VDEFs and vice versa
825 switch (im->gdes[gdi].gf) {
829 graph_desc_t *vdp = &im->gdes[im->gdes[gdi].vidx];
831 /* remove current shift */
832 vdp->start -= vdp->shift;
833 vdp->end -= vdp->shift;
836 if (im->gdes[gdi].shidx >= 0)
837 vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
840 vdp->shift = im->gdes[gdi].shval;
842 /* normalize shift to multiple of consolidated step */
843 vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
846 vdp->start += vdp->shift;
847 vdp->end += vdp->shift;
851 /* A VDEF has no DS. This also signals other parts
852 * of rrdtool that this is a VDEF value, not a CDEF.
854 im->gdes[gdi].ds_cnt = 0;
855 if (vdef_calc(im,gdi)) {
856 rrd_set_error("Error processing VDEF '%s'"
859 rpnstack_free(&rpnstack);
864 im->gdes[gdi].ds_cnt = 1;
865 im->gdes[gdi].ds = 0;
866 im->gdes[gdi].data_first = 1;
867 im->gdes[gdi].start = 0;
868 im->gdes[gdi].end = 0;
873 /* Find the variables in the expression.
874 * - VDEF variables are substituted by their values
875 * and the opcode is changed into OP_NUMBER.
876 * - CDEF variables are analized for their step size,
877 * the lowest common denominator of all the step
878 * sizes of the data sources involved is calculated
879 * and the resulting number is the step size for the
880 * resulting data source.
882 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
883 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
884 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
885 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
886 if (im->gdes[ptr].ds_cnt == 0) {
888 printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
890 im->gdes[ptr].vname);
891 printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
893 im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
894 im->gdes[gdi].rpnp[rpi].op = OP_NUMBER;
897 rrd_realloc(steparray,
898 (++stepcnt+1)*sizeof(*steparray)))==NULL){
899 rrd_set_error("realloc steparray");
900 rpnstack_free(&rpnstack);
904 steparray[stepcnt-1] = im->gdes[ptr].step;
906 /* adjust start and end of cdef (gdi) so
907 * that it runs from the latest start point
908 * to the earliest endpoint of any of the
909 * rras involved (ptr)
911 if(im->gdes[gdi].start < im->gdes[ptr].start)
912 im->gdes[gdi].start = im->gdes[ptr].start;
914 if(im->gdes[gdi].end == 0 ||
915 im->gdes[gdi].end > im->gdes[ptr].end)
916 im->gdes[gdi].end = im->gdes[ptr].end;
918 /* store pointer to the first element of
919 * the rra providing data for variable,
920 * further save step size and data source
923 im->gdes[gdi].rpnp[rpi].data = im->gdes[ptr].data + im->gdes[ptr].ds;
924 im->gdes[gdi].rpnp[rpi].step = im->gdes[ptr].step;
925 im->gdes[gdi].rpnp[rpi].ds_cnt = im->gdes[ptr].ds_cnt;
927 /* backoff the *.data ptr; this is done so
928 * rpncalc() function doesn't have to treat
929 * the first case differently
931 } /* if ds_cnt != 0 */
932 } /* if OP_VARIABLE */
933 } /* loop through all rpi */
935 /* move the data pointers to the correct period */
936 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
937 if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
938 im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
939 long ptr = im->gdes[gdi].rpnp[rpi].ptr;
940 long diff = im->gdes[gdi].start - im->gdes[ptr].start;
943 im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
947 if(steparray == NULL){
948 rrd_set_error("rpn expressions without DEF"
949 " or CDEF variables are not supported");
950 rpnstack_free(&rpnstack);
953 steparray[stepcnt]=0;
954 /* Now find the resulting step. All steps in all
955 * used RRAs have to be visited
957 im->gdes[gdi].step = lcd(steparray);
959 if((im->gdes[gdi].data = malloc((
960 (im->gdes[gdi].end-im->gdes[gdi].start)
961 / im->gdes[gdi].step)
962 * sizeof(double)))==NULL){
963 rrd_set_error("malloc im->gdes[gdi].data");
964 rpnstack_free(&rpnstack);
968 /* Step through the new cdef results array and
969 * calculate the values
971 for (now = im->gdes[gdi].start + im->gdes[gdi].step;
972 now<=im->gdes[gdi].end;
973 now += im->gdes[gdi].step)
975 rpnp_t *rpnp = im -> gdes[gdi].rpnp;
977 /* 3rd arg of rpn_calc is for OP_VARIABLE lookups;
978 * in this case we are advancing by timesteps;
979 * we use the fact that time_t is a synonym for long
981 if (rpn_calc(rpnp,&rpnstack,(long) now,
982 im->gdes[gdi].data,++dataidx) == -1) {
983 /* rpn_calc sets the error string */
984 rpnstack_free(&rpnstack);
987 } /* enumerate over time steps within a CDEF */
992 } /* enumerate over CDEFs */
993 rpnstack_free(&rpnstack);
997 /* massage data so, that we get one value for each x coordinate in the graph */
999 data_proc( image_desc_t *im ){
1001 double pixstep = (double)(im->end-im->start)
1002 /(double)im->xsize; /* how much time
1003 passes in one pixel */
1005 double minval=DNAN,maxval=DNAN;
1007 unsigned long gr_time;
1009 /* memory for the processed data */
1010 for(i=0;i<im->gdes_c;i++) {
1011 if((im->gdes[i].gf==GF_LINE) ||
1012 (im->gdes[i].gf==GF_AREA) ||
1013 (im->gdes[i].gf==GF_TICK) ||
1014 (im->gdes[i].gf==GF_STACK)) {
1015 if((im->gdes[i].p_data = malloc((im->xsize +1)
1016 * sizeof(rrd_value_t)))==NULL){
1017 rrd_set_error("malloc data_proc");
1023 for (i=0;i<im->xsize;i++) { /* for each pixel */
1025 gr_time = im->start+pixstep*i; /* time of the current step */
1028 for (ii=0;ii<im->gdes_c;ii++) {
1030 switch (im->gdes[ii].gf) {
1034 if (!im->gdes[ii].stack)
1037 value = im->gdes[ii].yrule;
1038 if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
1039 /* The time of the data doesn't necessarily match
1040 ** the time of the graph. Beware.
1042 vidx = im->gdes[ii].vidx;
1043 if (im->gdes[vidx].gf == GF_VDEF) {
1044 value = im->gdes[vidx].vf.val;
1045 } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
1046 ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
1047 value = im->gdes[vidx].data[
1048 (unsigned long) floor(
1049 (double)(gr_time - im->gdes[vidx].start)
1050 / im->gdes[vidx].step)
1051 * im->gdes[vidx].ds_cnt
1059 if (! isnan(value)) {
1061 im->gdes[ii].p_data[i] = paintval;
1062 /* GF_TICK: the data values are not
1063 ** relevant for min and max
1065 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
1066 if (isnan(minval) || paintval < minval)
1068 if (isnan(maxval) || paintval > maxval)
1072 im->gdes[ii].p_data[i] = DNAN;
1081 /* if min or max have not been asigned a value this is because
1082 there was no data in the graph ... this is not good ...
1083 lets set these to dummy values then ... */
1085 if (isnan(minval)) minval = 0.0;
1086 if (isnan(maxval)) maxval = 1.0;
1088 /* adjust min and max values */
1089 if (isnan(im->minval)
1090 /* don't adjust low-end with log scale */
1091 || ((!im->logarithmic && !im->rigid) && im->minval > minval)
1093 im->minval = minval;
1094 if (isnan(im->maxval)
1095 || (!im->rigid && im->maxval < maxval)
1097 if (im->logarithmic)
1098 im->maxval = maxval * 1.1;
1100 im->maxval = maxval;
1102 /* make sure min is smaller than max */
1103 if (im->minval > im->maxval) {
1104 im->minval = 0.99 * im->maxval;
1107 /* make sure min and max are not equal */
1108 if (im->minval == im->maxval) {
1110 if (! im->logarithmic) {
1113 /* make sure min and max are not both zero */
1114 if (im->maxval == 0.0) {
1123 /* identify the point where the first gridline, label ... gets placed */
1127 time_t start, /* what is the initial time */
1128 enum tmt_en baseint, /* what is the basic interval */
1129 long basestep /* how many if these do we jump a time */
1133 localtime_r(&start, &tm);
1136 tm.tm_sec -= tm.tm_sec % basestep; break;
1139 tm.tm_min -= tm.tm_min % basestep;
1144 tm.tm_hour -= tm.tm_hour % basestep; break;
1146 /* we do NOT look at the basestep for this ... */
1149 tm.tm_hour = 0; break;
1151 /* we do NOT look at the basestep for this ... */
1155 tm.tm_mday -= tm.tm_wday -1; /* -1 because we want the monday */
1156 if (tm.tm_wday==0) tm.tm_mday -= 7; /* we want the *previous* monday */
1163 tm.tm_mon -= tm.tm_mon % basestep; break;
1171 tm.tm_year -= (tm.tm_year+1900) % basestep;
1176 /* identify the point where the next gridline, label ... gets placed */
1179 time_t current, /* what is the initial time */
1180 enum tmt_en baseint, /* what is the basic interval */
1181 long basestep /* how many if these do we jump a time */
1186 localtime_r(¤t, &tm);
1190 tm.tm_sec += basestep; break;
1192 tm.tm_min += basestep; break;
1194 tm.tm_hour += basestep; break;
1196 tm.tm_mday += basestep; break;
1198 tm.tm_mday += 7*basestep; break;
1200 tm.tm_mon += basestep; break;
1202 tm.tm_year += basestep;
1204 madetime = mktime(&tm);
1205 } while (madetime == -1); /* this is necessary to skip impssible times
1206 like the daylight saving time skips */
1212 /* calculate values required for PRINT and GPRINT functions */
1215 print_calc(image_desc_t *im, char ***prdata)
1217 long i,ii,validsteps;
1220 int graphelement = 0;
1223 double magfact = -1;
1227 if (im->imginfo) prlines++;
1228 for(i=0;i<im->gdes_c;i++){
1229 switch(im->gdes[i].gf){
1232 if(((*prdata) = rrd_realloc((*prdata),prlines*sizeof(char *)))==NULL){
1233 rrd_set_error("realloc prdata");
1237 /* PRINT and GPRINT can now print VDEF generated values.
1238 * There's no need to do any calculations on them as these
1239 * calculations were already made.
1241 vidx = im->gdes[i].vidx;
1242 if (im->gdes[vidx].gf==GF_VDEF) { /* simply use vals */
1243 printval = im->gdes[vidx].vf.val;
1244 printtime = im->gdes[vidx].vf.when;
1245 } else { /* need to calculate max,min,avg etcetera */
1246 max_ii =((im->gdes[vidx].end
1247 - im->gdes[vidx].start)
1248 / im->gdes[vidx].step
1249 * im->gdes[vidx].ds_cnt);
1252 for( ii=im->gdes[vidx].ds;
1254 ii+=im->gdes[vidx].ds_cnt){
1255 if (! finite(im->gdes[vidx].data[ii]))
1257 if (isnan(printval)){
1258 printval = im->gdes[vidx].data[ii];
1263 switch (im->gdes[i].cf){
1266 case CF_DEVSEASONAL:
1270 printval += im->gdes[vidx].data[ii];
1273 printval = min( printval, im->gdes[vidx].data[ii]);
1277 printval = max( printval, im->gdes[vidx].data[ii]);
1280 printval = im->gdes[vidx].data[ii];
1283 if (im->gdes[i].cf==CF_AVERAGE || im->gdes[i].cf > CF_LAST) {
1284 if (validsteps > 1) {
1285 printval = (printval / validsteps);
1288 } /* prepare printval */
1290 if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
1291 char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
1292 if (im->gdes[i].gf == GF_PRINT){
1293 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1294 sprintf((*prdata)[prlines-2],"%s (%lu)",
1295 ctime_r(&printtime,ctime_buf),printtime);
1296 (*prdata)[prlines-1] = NULL;
1298 sprintf(im->gdes[i].legend,"%s (%lu)",
1299 ctime_r(&printtime,ctime_buf),printtime);
1303 if ((percent_s = strstr(im->gdes[i].format,"%S")) != NULL) {
1304 /* Magfact is set to -1 upon entry to print_calc. If it
1305 * is still less than 0, then we need to run auto_scale.
1306 * Otherwise, put the value into the correct units. If
1307 * the value is 0, then do not set the symbol or magnification
1308 * so next the calculation will be performed again. */
1309 if (magfact < 0.0) {
1310 auto_scale(im,&printval,&si_symb,&magfact);
1311 if (printval == 0.0)
1314 printval /= magfact;
1316 *(++percent_s) = 's';
1317 } else if (strstr(im->gdes[i].format,"%s") != NULL) {
1318 auto_scale(im,&printval,&si_symb,&magfact);
1321 if (im->gdes[i].gf == GF_PRINT){
1322 (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
1323 (*prdata)[prlines-1] = NULL;
1324 if (bad_format(im->gdes[i].format)) {
1325 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1328 #ifdef HAVE_SNPRINTF
1329 snprintf((*prdata)[prlines-2],FMT_LEG_LEN,im->gdes[i].format,printval,si_symb);
1331 sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
1336 if (bad_format(im->gdes[i].format)) {
1337 rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
1340 #ifdef HAVE_SNPRINTF
1341 snprintf(im->gdes[i].legend,FMT_LEG_LEN-2,im->gdes[i].format,printval,si_symb);
1343 sprintf(im->gdes[i].legend,im->gdes[i].format,printval,si_symb);
1367 return graphelement;
1371 /* place legends with color spots */
1373 leg_place(image_desc_t *im)
1376 int interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1377 int box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
1378 int border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
1379 int fill=0, fill_last;
1381 int leg_x = border, leg_y = im->yimg;
1385 char prt_fctn; /*special printfunctions */
1388 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1389 if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
1390 rrd_set_error("malloc for legspace");
1394 for(i=0;i<im->gdes_c;i++){
1397 /* hid legends for rules which are not displayed */
1399 if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
1400 if (im->gdes[i].gf == GF_HRULE &&
1401 (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
1402 im->gdes[i].legend[0] = '\0';
1404 if (im->gdes[i].gf == GF_VRULE &&
1405 (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
1406 im->gdes[i].legend[0] = '\0';
1409 leg_cc = strlen(im->gdes[i].legend);
1411 /* is there a controle code ant the end of the legend string ? */
1412 if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
1413 prt_fctn = im->gdes[i].legend[leg_cc-1];
1415 im->gdes[i].legend[leg_cc] = '\0';
1419 /* remove exess space */
1420 while (prt_fctn=='g' &&
1422 im->gdes[i].legend[leg_cc-1]==' '){
1424 im->gdes[i].legend[leg_cc]='\0';
1427 legspace[i]=(prt_fctn=='g' ? 0 : interleg);
1430 /* no interleg space if string ends in \g */
1431 fill += legspace[i];
1433 if (im->gdes[i].gf != GF_GPRINT &&
1434 im->gdes[i].gf != GF_COMMENT) {
1437 fill += gfx_get_text_width(im->canvas, fill+border,
1438 im->text_prop[TEXT_PROP_LEGEND].font,
1439 im->text_prop[TEXT_PROP_LEGEND].size,
1441 im->gdes[i].legend, 0);
1446 /* who said there was a special tag ... ?*/
1447 if (prt_fctn=='g') {
1450 if (prt_fctn == '\0') {
1451 if (i == im->gdes_c -1 ) prt_fctn ='l';
1453 /* is it time to place the legends ? */
1454 if (fill > im->ximg - 2*border){
1469 if (prt_fctn != '\0'){
1471 if (leg_c >= 2 && prt_fctn == 'j') {
1472 glue = (im->ximg - fill - 2* border) / (leg_c-1);
1476 if (prt_fctn =='c') leg_x = (im->ximg - fill) / 2.0;
1477 if (prt_fctn =='r') leg_x = im->ximg - fill - border;
1479 for(ii=mark;ii<=i;ii++){
1480 if(im->gdes[ii].legend[0]=='\0')
1482 im->gdes[ii].leg_x = leg_x;
1483 im->gdes[ii].leg_y = leg_y;
1485 gfx_get_text_width(im->canvas, leg_x,
1486 im->text_prop[TEXT_PROP_LEGEND].font,
1487 im->text_prop[TEXT_PROP_LEGEND].size,
1489 im->gdes[ii].legend, 0)
1492 if (im->gdes[ii].gf != GF_GPRINT &&
1493 im->gdes[ii].gf != GF_COMMENT)
1496 leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1497 if (prt_fctn == 's') leg_y -= im->text_prop[TEXT_PROP_LEGEND].size*1.2;
1509 /* create a grid on the graph. it determines what to do
1510 from the values of xsize, start and end */
1512 /* the xaxis labels are determined from the number of seconds per pixel
1513 in the requested graph */
1518 calc_horizontal_grid(image_desc_t *im)
1524 int decimals, fractionals;
1526 im->ygrid_scale.labfact=2;
1528 range = im->maxval - im->minval;
1529 scaledrange = range / im->magfact;
1531 /* does the scale of this graph make it impossible to put lines
1532 on it? If so, give up. */
1533 if (isnan(scaledrange)) {
1537 /* find grid spaceing */
1539 if(isnan(im->ygridstep)){
1540 if(im->extra_flags & ALTYGRID) {
1541 /* find the value with max number of digits. Get number of digits */
1542 decimals = ceil(log10(max(fabs(im->maxval), fabs(im->minval))));
1543 if(decimals <= 0) /* everything is small. make place for zero */
1546 fractionals = floor(log10(range));
1547 if(fractionals < 0) /* small amplitude. */
1548 sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
1550 sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
1551 im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
1552 if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
1553 im->ygrid_scale.gridstep = 0.1;
1554 /* should have at least 5 lines but no more then 15 */
1555 if(range/im->ygrid_scale.gridstep < 5)
1556 im->ygrid_scale.gridstep /= 10;
1557 if(range/im->ygrid_scale.gridstep > 15)
1558 im->ygrid_scale.gridstep *= 10;
1559 if(range/im->ygrid_scale.gridstep > 5) {
1560 im->ygrid_scale.labfact = 1;
1561 if(range/im->ygrid_scale.gridstep > 8)
1562 im->ygrid_scale.labfact = 2;
1565 im->ygrid_scale.gridstep /= 5;
1566 im->ygrid_scale.labfact = 5;
1570 for(i=0;ylab[i].grid > 0;i++){
1571 pixel = im->ysize / (scaledrange / ylab[i].grid);
1572 if (gridind == -1 && pixel > 5) {
1579 if (pixel * ylab[gridind].lfac[i] >= 2 * im->text_prop[TEXT_PROP_AXIS].size) {
1580 im->ygrid_scale.labfact = ylab[gridind].lfac[i];
1585 im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
1588 im->ygrid_scale.gridstep = im->ygridstep;
1589 im->ygrid_scale.labfact = im->ylabfact;
1594 int draw_horizontal_grid(image_desc_t *im)
1598 char graph_label[100];
1599 double X0=im->xorigin;
1600 double X1=im->xorigin+im->xsize;
1602 int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
1603 int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
1604 scaledstep = im->ygrid_scale.gridstep/im->magfact;
1605 for (i = sgrid; i <= egrid; i++){
1606 double Y0=ytr(im,im->ygrid_scale.gridstep*i);
1607 if ( Y0 >= im->yorigin-im->ysize
1608 && Y0 <= im->yorigin){
1609 if(i % im->ygrid_scale.labfact == 0){
1610 if (i==0 || im->symbol == ' ') {
1612 if(im->extra_flags & ALTYGRID) {
1613 sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
1616 sprintf(graph_label,"%4.1f",scaledstep*i);
1619 sprintf(graph_label,"%4.0f",scaledstep*i);
1623 sprintf(graph_label,"%4.1f %c",scaledstep*i, im->symbol);
1625 sprintf(graph_label,"%4.0f %c",scaledstep*i, im->symbol);
1629 gfx_new_text ( im->canvas,
1630 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1631 im->graph_col[GRC_FONT],
1632 im->text_prop[TEXT_PROP_AXIS].font,
1633 im->text_prop[TEXT_PROP_AXIS].size,
1634 im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
1636 gfx_new_dashed_line ( im->canvas,
1639 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1640 im->grid_dash_on, im->grid_dash_off);
1642 } else if (!(im->extra_flags & NOMINOR)) {
1643 gfx_new_dashed_line ( im->canvas,
1646 GRIDWIDTH, im->graph_col[GRC_GRID],
1647 im->grid_dash_on, im->grid_dash_off);
1655 /* logaritmic horizontal grid */
1657 horizontal_log_grid(image_desc_t *im)
1661 int minoridx=0, majoridx=0;
1662 char graph_label[100];
1664 double value, pixperstep, minstep;
1666 /* find grid spaceing */
1667 pixpex= (double)im->ysize / (log10(im->maxval) - log10(im->minval));
1669 if (isnan(pixpex)) {
1673 for(i=0;yloglab[i][0] > 0;i++){
1674 minstep = log10(yloglab[i][0]);
1675 for(ii=1;yloglab[i][ii+1] > 0;ii++){
1676 if(yloglab[i][ii+2]==0){
1677 minstep = log10(yloglab[i][ii+1])-log10(yloglab[i][ii]);
1681 pixperstep = pixpex * minstep;
1682 if(pixperstep > 5){minoridx = i;}
1683 if(pixperstep > 2 * im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
1687 X1=im->xorigin+im->xsize;
1688 /* paint minor grid */
1689 for (value = pow((double)10, log10(im->minval)
1690 - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
1691 value <= im->maxval;
1692 value *= yloglab[minoridx][0]){
1693 if (value < im->minval) continue;
1695 while(yloglab[minoridx][++i] > 0){
1696 Y0 = ytr(im,value * yloglab[minoridx][i]);
1697 if (Y0 <= im->yorigin - im->ysize) break;
1698 gfx_new_dashed_line ( im->canvas,
1701 GRIDWIDTH, im->graph_col[GRC_GRID],
1702 im->grid_dash_on, im->grid_dash_off);
1706 /* paint major grid and labels*/
1707 for (value = pow((double)10, log10(im->minval)
1708 - fmod(log10(im->minval),log10(yloglab[majoridx][0])));
1709 value <= im->maxval;
1710 value *= yloglab[majoridx][0]){
1711 if (value < im->minval) continue;
1713 while(yloglab[majoridx][++i] > 0){
1714 Y0 = ytr(im,value * yloglab[majoridx][i]);
1715 if (Y0 <= im->yorigin - im->ysize) break;
1716 gfx_new_dashed_line ( im->canvas,
1719 MGRIDWIDTH, im->graph_col[GRC_MGRID],
1720 im->grid_dash_on, im->grid_dash_off);
1722 sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
1723 gfx_new_text ( im->canvas,
1724 X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
1725 im->graph_col[GRC_FONT],
1726 im->text_prop[TEXT_PROP_AXIS].font,
1727 im->text_prop[TEXT_PROP_AXIS].size,
1728 im->tabwidth,0.0, GFX_H_RIGHT, GFX_V_CENTER,
1740 int xlab_sel; /* which sort of label and grid ? */
1741 time_t ti, tilab, timajor;
1743 char graph_label[100];
1744 double X0,Y0,Y1; /* points for filled graph and more*/
1747 /* the type of time grid is determined by finding
1748 the number of seconds per pixel in the graph */
1751 if(im->xlab_user.minsec == -1){
1752 factor=(im->end - im->start)/im->xsize;
1754 while ( xlab[xlab_sel+1].minsec != -1
1755 && xlab[xlab_sel+1].minsec <= factor){ xlab_sel++; }
1756 im->xlab_user.gridtm = xlab[xlab_sel].gridtm;
1757 im->xlab_user.gridst = xlab[xlab_sel].gridst;
1758 im->xlab_user.mgridtm = xlab[xlab_sel].mgridtm;
1759 im->xlab_user.mgridst = xlab[xlab_sel].mgridst;
1760 im->xlab_user.labtm = xlab[xlab_sel].labtm;
1761 im->xlab_user.labst = xlab[xlab_sel].labst;
1762 im->xlab_user.precis = xlab[xlab_sel].precis;
1763 im->xlab_user.stst = xlab[xlab_sel].stst;
1766 /* y coords are the same for every line ... */
1768 Y1 = im->yorigin-im->ysize;
1771 /* paint the minor grid */
1772 if (!(im->extra_flags & NOMINOR))
1774 for(ti = find_first_time(im->start,
1775 im->xlab_user.gridtm,
1776 im->xlab_user.gridst),
1777 timajor = find_first_time(im->start,
1778 im->xlab_user.mgridtm,
1779 im->xlab_user.mgridst);
1781 ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
1783 /* are we inside the graph ? */
1784 if (ti < im->start || ti > im->end) continue;
1785 while (timajor < ti) {
1786 timajor = find_next_time(timajor,
1787 im->xlab_user.mgridtm, im->xlab_user.mgridst);
1789 if (ti == timajor) continue; /* skip as falls on major grid line */
1791 gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
1792 im->graph_col[GRC_GRID],
1793 im->grid_dash_on, im->grid_dash_off);
1798 /* paint the major grid */
1799 for(ti = find_first_time(im->start,
1800 im->xlab_user.mgridtm,
1801 im->xlab_user.mgridst);
1803 ti = find_next_time(ti,im->xlab_user.mgridtm,im->xlab_user.mgridst)
1805 /* are we inside the graph ? */
1806 if (ti < im->start || ti > im->end) continue;
1808 gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
1809 im->graph_col[GRC_MGRID],
1810 im->grid_dash_on, im->grid_dash_off);
1813 /* paint the labels below the graph */
1814 for(ti = find_first_time(im->start,
1815 im->xlab_user.labtm,
1816 im->xlab_user.labst);
1818 ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
1820 tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
1821 /* are we inside the graph ? */
1822 if (ti < im->start || ti > im->end) continue;
1825 localtime_r(&tilab, &tm);
1826 strftime(graph_label,99,im->xlab_user.stst, &tm);
1828 # error "your libc has no strftime I guess we'll abort the exercise here."
1830 gfx_new_text ( im->canvas,
1831 xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
1832 im->graph_col[GRC_FONT],
1833 im->text_prop[TEXT_PROP_AXIS].font,
1834 im->text_prop[TEXT_PROP_AXIS].size,
1835 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_TOP,
1848 /* draw x and y axis */
1849 gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
1850 im->xorigin+im->xsize,im->yorigin-im->ysize,
1851 GRIDWIDTH, im->graph_col[GRC_GRID]);
1853 gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
1854 im->xorigin+im->xsize,im->yorigin-im->ysize,
1855 GRIDWIDTH, im->graph_col[GRC_GRID]);
1857 gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
1858 im->xorigin+im->xsize+4,im->yorigin,
1859 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1861 gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
1862 im->xorigin,im->yorigin-im->ysize-4,
1863 MGRIDWIDTH, im->graph_col[GRC_GRID]);
1866 /* arrow for X axis direction */
1867 gfx_new_area ( im->canvas,
1868 im->xorigin+im->xsize+3, im->yorigin-3,
1869 im->xorigin+im->xsize+3, im->yorigin+4,
1870 im->xorigin+im->xsize+8, im->yorigin+0.5, /* LINEOFFSET */
1871 im->graph_col[GRC_ARROW]);
1878 grid_paint(image_desc_t *im)
1882 double X0,Y0; /* points for filled graph and more*/
1885 /* draw 3d border */
1886 node = gfx_new_area (im->canvas, 0,im->yimg,
1888 2,2,im->graph_col[GRC_SHADEA]);
1889 gfx_add_point( node , im->ximg - 2, 2 );
1890 gfx_add_point( node , im->ximg, 0 );
1891 gfx_add_point( node , 0,0 );
1892 /* gfx_add_point( node , 0,im->yimg ); */
1894 node = gfx_new_area (im->canvas, 2,im->yimg-2,
1895 im->ximg-2,im->yimg-2,
1897 im->graph_col[GRC_SHADEB]);
1898 gfx_add_point( node , im->ximg,0);
1899 gfx_add_point( node , im->ximg,im->yimg);
1900 gfx_add_point( node , 0,im->yimg);
1901 /* gfx_add_point( node , 0,im->yimg ); */
1904 if (im->draw_x_grid == 1 )
1907 if (im->draw_y_grid == 1){
1908 if(im->logarithmic){
1909 res = horizontal_log_grid(im);
1911 res = draw_horizontal_grid(im);
1914 /* dont draw horizontal grid if there is no min and max val */
1916 char *nodata = "No Data found";
1917 gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
1918 im->graph_col[GRC_FONT],
1919 im->text_prop[TEXT_PROP_AXIS].font,
1920 im->text_prop[TEXT_PROP_AXIS].size,
1921 im->tabwidth, 0.0, GFX_H_CENTER, GFX_V_CENTER,
1926 /* yaxis description */
1927 /* if (im->canvas->imgformat != IF_PNG) {*/
1929 gfx_new_text( im->canvas,
1930 7, (im->yorigin - im->ysize/2),
1931 im->graph_col[GRC_FONT],
1932 im->text_prop[TEXT_PROP_AXIS].font,
1933 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth,
1934 RRDGRAPH_YLEGEND_ANGLE,
1935 GFX_H_LEFT, GFX_V_CENTER,
1938 /* horrible hack until we can actually print vertically */
1942 for (n=0;n< (int)strlen(im->ylegend);n++) {
1943 s[0]=im->ylegend[n];
1945 gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(n+1),
1946 im->graph_col[GRC_FONT],
1947 im->text_prop[TEXT_PROP_AXIS].font,
1948 im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
1949 GFX_H_CENTER, GFX_V_CENTER,
1956 gfx_new_text( im->canvas,
1957 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size,
1958 im->graph_col[GRC_FONT],
1959 im->text_prop[TEXT_PROP_TITLE].font,
1960 im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
1961 GFX_H_CENTER, GFX_V_CENTER,
1965 if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
1966 for(i=0;i<im->gdes_c;i++){
1967 if(im->gdes[i].legend[0] =='\0')
1970 /* im->gdes[i].leg_y is the bottom of the legend */
1971 X0 = im->gdes[i].leg_x;
1972 Y0 = im->gdes[i].leg_y;
1974 if ( im->gdes[i].gf != GF_GPRINT
1975 && im->gdes[i].gf != GF_COMMENT) {
1978 boxH = gfx_get_text_width(im->canvas, 0,
1979 im->text_prop[TEXT_PROP_AXIS].font,
1980 im->text_prop[TEXT_PROP_AXIS].size,
1981 im->tabwidth,"M", 0) * 1.25;
1984 node = gfx_new_area(im->canvas,
1989 gfx_add_point ( node, X0+boxH, Y0-boxV );
1990 node = gfx_new_line(im->canvas,
1993 gfx_add_point(node,X0+boxH,Y0);
1994 gfx_add_point(node,X0+boxH,Y0-boxV);
1995 gfx_close_path(node);
1996 X0 += boxH / 1.25 * 2;
1998 gfx_new_text ( im->canvas, X0, Y0,
1999 im->graph_col[GRC_FONT],
2000 im->text_prop[TEXT_PROP_AXIS].font,
2001 im->text_prop[TEXT_PROP_AXIS].size,
2002 im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
2003 im->gdes[i].legend );
2009 /*****************************************************
2010 * lazy check make sure we rely need to create this graph
2011 *****************************************************/
2013 int lazy_check(image_desc_t *im){
2016 struct stat imgstat;
2018 if (im->lazy == 0) return 0; /* no lazy option */
2019 if (stat(im->graphfile,&imgstat) != 0)
2020 return 0; /* can't stat */
2021 /* one pixel in the existing graph is more then what we would
2023 if (time(NULL) - imgstat.st_mtime >
2024 (im->end - im->start) / im->xsize)
2026 if ((fd = fopen(im->graphfile,"rb")) == NULL)
2027 return 0; /* the file does not exist */
2028 switch (im->canvas->imgformat) {
2030 size = PngSize(fd,&(im->ximg),&(im->yimg));
2040 pie_part(image_desc_t *im, gfx_color_t color,
2041 double PieCenterX, double PieCenterY, double Radius,
2042 double startangle, double endangle)
2046 double step=M_PI/50; /* Number of iterations for the circle;
2047 ** 10 is definitely too low, more than
2048 ** 50 seems to be overkill
2051 /* Strange but true: we have to work clockwise or else
2052 ** anti aliasing nor transparency don't work.
2054 ** This test is here to make sure we do it right, also
2055 ** this makes the for...next loop more easy to implement.
2056 ** The return will occur if the user enters a negative number
2057 ** (which shouldn't be done according to the specs) or if the
2058 ** programmers do something wrong (which, as we all know, never
2059 ** happens anyway :)
2061 if (endangle<startangle) return;
2063 /* Hidden feature: Radius decreases each full circle */
2065 while (angle>=2*M_PI) {
2070 node=gfx_new_area(im->canvas,
2071 PieCenterX+sin(startangle)*Radius,
2072 PieCenterY-cos(startangle)*Radius,
2075 PieCenterX+sin(endangle)*Radius,
2076 PieCenterY-cos(endangle)*Radius,
2078 for (angle=endangle;angle-startangle>=step;angle-=step) {
2080 PieCenterX+sin(angle)*Radius,
2081 PieCenterY-cos(angle)*Radius );
2086 graph_size_location(image_desc_t *im, int elements, int piechart )
2088 /* The actual size of the image to draw is determined from
2089 ** several sources. The size given on the command line is
2090 ** the graph area but we need more as we have to draw labels
2091 ** and other things outside the graph area
2094 /* +-+-------------------------------------------+
2095 ** |l|.................title.....................|
2096 ** |e+--+-------------------------------+--------+
2099 ** |l| l| main graph area | chart |
2102 ** |r+--+-------------------------------+--------+
2103 ** |e| | x-axis labels | |
2104 ** |v+--+-------------------------------+--------+
2105 ** | |..............legends......................|
2106 ** +-+-------------------------------------------+
2108 int Xvertical=0, Yvertical=0,
2109 Xtitle =0, Ytitle =0,
2110 Xylabel =0, Yylabel =0,
2113 Xxlabel =0, Yxlabel =0,
2115 Xlegend =0, Ylegend =0,
2117 Xspacing =10, Yspacing =10;
2119 if (im->extra_flags & ONLY_GRAPH) {
2120 if ( im->ysize > 32 ) {
2121 rrd_set_error("height > 32 is not possible with --only-graph option");
2127 if (im->ylegend[0] != '\0') {
2128 Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
2129 Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
2133 if (im->title[0] != '\0') {
2134 /* The title is placed "inbetween" two text lines so it
2135 ** automatically has some vertical spacing. The horizontal
2136 ** spacing is added here, on each side.
2138 Xtitle = gfx_get_text_width(im->canvas, 0,
2139 im->text_prop[TEXT_PROP_TITLE].font,
2140 im->text_prop[TEXT_PROP_TITLE].size,
2142 im->title, 0) + 2*Xspacing;
2143 Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
2149 if (im->draw_x_grid) {
2151 Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
2153 if (im->draw_y_grid) {
2154 Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
2160 im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
2165 /* Now calculate the total size. Insert some spacing where
2166 desired. im->xorigin and im->yorigin need to correspond
2167 with the lower left corner of the main graph area or, if
2168 this one is not set, the imaginary box surrounding the
2171 /* The legend width cannot yet be determined, as a result we
2172 ** have problems adjusting the image to it. For now, we just
2173 ** forget about it at all; the legend will have to fit in the
2174 ** size already allocated.
2178 if ( !(im->extra_flags & ONLY_GRAPH) ) {
2179 im->ximg = Xylabel + Xmain + Xpie + Xspacing;
2182 if (Xmain) im->ximg += Xspacing;
2183 if (Xpie) im->ximg += Xspacing;
2185 if (im->extra_flags & ONLY_GRAPH) {
2188 im->xorigin = Xspacing + Xylabel;
2191 if (Xtitle > im->ximg) im->ximg = Xtitle;
2193 im->ximg += Xvertical;
2194 im->xorigin += Xvertical;
2198 /* The vertical size is interesting... we need to compare
2199 ** the sum of {Ytitle, Ymain, Yxlabel, Ylegend} with Yvertical
2200 ** however we need to know {Ytitle+Ymain+Yxlabel} in order to
2201 ** start even thinking about Ylegend.
2203 ** Do it in three portions: First calculate the inner part,
2204 ** then do the legend, then adjust the total height of the img.
2207 /* reserve space for main and/or pie */
2209 if (im->extra_flags & ONLY_GRAPH) {
2212 im->yimg = Ymain + Yxlabel;
2215 if (im->yimg < Ypie) im->yimg = Ypie;
2217 if (im->extra_flags & ONLY_GRAPH) {
2218 im->yorigin = im->yimg;
2220 im->yorigin = im->yimg - Yxlabel;
2223 /* reserve space for the title *or* some padding above the graph */
2226 im->yorigin += Ytitle;
2228 im->yimg += Yspacing;
2229 im->yorigin += Yspacing;
2231 /* reserve space for padding below the graph */
2232 im->yimg += Yspacing;
2235 /* Determine where to place the legends onto the image.
2236 ** Adjust im->yimg to match the space requirements.
2238 if(leg_place(im)==-1)
2241 /* last of three steps: check total height of image */
2242 if (im->yimg < Yvertical) im->yimg = Yvertical;
2245 if (Xlegend > im->ximg) {
2247 /* reposition Pie */
2251 /* The pie is placed in the upper right hand corner,
2252 ** just below the title (if any) and with sufficient
2256 im->pie_x = im->ximg - Xspacing - Xpie/2;
2257 im->pie_y = im->yorigin-Ymain+Ypie/2;
2259 im->pie_x = im->ximg/2;
2260 im->pie_y = im->yorigin-Ypie/2;
2266 /* draw that picture thing ... */
2268 graph_paint(image_desc_t *im, char ***calcpr)
2271 int lazy = lazy_check(im);
2273 double PieStart=0.0;
2277 double areazero = 0.0;
2278 enum gf_en stack_gf = GF_PRINT;
2279 graph_desc_t *lastgdes = NULL;
2281 /* if we are lazy and there is nothing to PRINT ... quit now */
2282 if (lazy && im->prt_c==0) return 0;
2284 /* pull the data from the rrd files ... */
2286 if(data_fetch(im)==-1)
2289 /* evaluate VDEF and CDEF operations ... */
2290 if(data_calc(im)==-1)
2293 /* check if we need to draw a piechart */
2294 for(i=0;i<im->gdes_c;i++){
2295 if (im->gdes[i].gf == GF_PART) {
2301 /* calculate and PRINT and GPRINT definitions. We have to do it at
2302 * this point because it will affect the length of the legends
2303 * if there are no graph elements we stop here ...
2304 * if we are lazy, try to quit ...
2306 i=print_calc(im,calcpr);
2308 if(((i==0)&&(piechart==0)) || lazy) return 0;
2310 /* If there's only the pie chart to draw, signal this */
2311 if (i==0) piechart=2;
2313 /* get actual drawing data and find min and max values*/
2314 if(data_proc(im)==-1)
2317 if(!im->logarithmic){si_unit(im);} /* identify si magnitude Kilo, Mega Giga ? */
2319 if(!im->rigid && ! im->logarithmic)
2320 expand_range(im); /* make sure the upper and lower limit are
2323 if (!calc_horizontal_grid(im))
2330 /**************************************************************
2331 *** Calculating sizes and locations became a bit confusing ***
2332 *** so I moved this into a separate function. ***
2333 **************************************************************/
2334 if(graph_size_location(im,i,piechart)==-1)
2337 /* the actual graph is created by going through the individual
2338 graph elements and then drawing them */
2340 node=gfx_new_area ( im->canvas,
2344 im->graph_col[GRC_BACK]);
2346 gfx_add_point(node,0, im->yimg);
2348 if (piechart != 2) {
2349 node=gfx_new_area ( im->canvas,
2350 im->xorigin, im->yorigin,
2351 im->xorigin + im->xsize, im->yorigin,
2352 im->xorigin + im->xsize, im->yorigin-im->ysize,
2353 im->graph_col[GRC_CANVAS]);
2355 gfx_add_point(node,im->xorigin, im->yorigin - im->ysize);
2357 if (im->minval > 0.0)
2358 areazero = im->minval;
2359 if (im->maxval < 0.0)
2360 areazero = im->maxval;
2361 if( !(im->extra_flags & ONLY_GRAPH) )
2366 pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
2369 for(i=0;i<im->gdes_c;i++){
2370 switch(im->gdes[i].gf){
2383 for (ii = 0; ii < im->xsize; ii++)
2385 if (!isnan(im->gdes[i].p_data[ii]) &&
2386 im->gdes[i].p_data[ii] > 0.0)
2388 /* generate a tick */
2389 gfx_new_line(im->canvas, im -> xorigin + ii,
2390 im -> yorigin - (im -> gdes[i].yrule * im -> ysize),
2394 im -> gdes[i].col );
2400 stack_gf = im->gdes[i].gf;
2402 /* fix data points at oo and -oo */
2403 for(ii=0;ii<im->xsize;ii++){
2404 if (isinf(im->gdes[i].p_data[ii])){
2405 if (im->gdes[i].p_data[ii] > 0) {
2406 im->gdes[i].p_data[ii] = im->maxval ;
2408 im->gdes[i].p_data[ii] = im->minval ;
2414 if (im->gdes[i].col != 0x0){
2415 /* GF_LINE and friend */
2416 if(stack_gf == GF_LINE ){
2418 for(ii=1;ii<im->xsize;ii++){
2419 if ( ! isnan(im->gdes[i].p_data[ii-1])
2420 && ! isnan(im->gdes[i].p_data[ii])){
2422 node = gfx_new_line(im->canvas,
2423 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2424 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2425 im->gdes[i].linewidth,
2428 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2437 for(ii=1;ii<im->xsize;ii++){
2439 if ( ! isnan(im->gdes[i].p_data[ii-1])
2440 && ! isnan(im->gdes[i].p_data[ii])){
2444 if (im->gdes[i].gf == GF_STACK) {
2446 if ( (im->gdes[i].gf == GF_STACK)
2447 || (im->gdes[i].stack) ) {
2449 ybase = ytr(im,lastgdes->p_data[ii-1]);
2451 ybase = ytr(im,areazero);
2454 node = gfx_new_area(im->canvas,
2455 ii-1+im->xorigin,ybase,
2456 ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
2457 ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
2461 gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
2465 if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
2466 /* GF_AREA STACK type*/
2468 if (im->gdes[i].gf == GF_STACK ) {
2470 if ( (im->gdes[i].gf == GF_STACK)
2471 || (im->gdes[i].stack) ) {
2473 for (iii=ii-1;iii>area_start;iii--){
2474 gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
2477 gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
2482 } /* else GF_LINE */
2483 } /* if color != 0x0 */
2484 /* make sure we do not run into trouble when stacking on NaN */
2485 for(ii=0;ii<im->xsize;ii++){
2486 if (isnan(im->gdes[i].p_data[ii])) {
2487 if (lastgdes && (im->gdes[i].gf == GF_STACK)) {
2488 im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
2490 im->gdes[i].p_data[ii] = ytr(im,areazero);
2494 lastgdes = &(im->gdes[i]);
2497 if(isnan(im->gdes[i].yrule)) /* fetch variable */
2498 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2500 if (finite(im->gdes[i].yrule)) { /* even the fetched var can be NaN */
2501 pie_part(im,im->gdes[i].col,
2502 im->pie_x,im->pie_y,im->piesize*0.4,
2503 M_PI*2.0*PieStart/100.0,
2504 M_PI*2.0*(PieStart+im->gdes[i].yrule)/100.0);
2505 PieStart += im->gdes[i].yrule;
2514 /* grid_paint also does the text */
2515 if( !(im->extra_flags & ONLY_GRAPH) )
2518 /* the RULES are the last thing to paint ... */
2519 for(i=0;i<im->gdes_c;i++){
2521 switch(im->gdes[i].gf){
2523 if(isnan(im->gdes[i].yrule)) { /* fetch variable */
2524 im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
2526 if(im->gdes[i].yrule >= im->minval
2527 && im->gdes[i].yrule <= im->maxval)
2528 gfx_new_line(im->canvas,
2529 im->xorigin,ytr(im,im->gdes[i].yrule),
2530 im->xorigin+im->xsize,ytr(im,im->gdes[i].yrule),
2531 1.0,im->gdes[i].col);
2534 if(im->gdes[i].xrule == 0) { /* fetch variable */
2535 im->gdes[i].xrule = im->gdes[im->gdes[i].vidx].vf.when;
2537 if(im->gdes[i].xrule >= im->start
2538 && im->gdes[i].xrule <= im->end)
2539 gfx_new_line(im->canvas,
2540 xtr(im,im->gdes[i].xrule),im->yorigin,
2541 xtr(im,im->gdes[i].xrule),im->yorigin-im->ysize,
2542 1.0,im->gdes[i].col);
2550 if (strcmp(im->graphfile,"-")==0) {
2551 fo = im->graphhandle ? im->graphhandle : stdout;
2553 /* Change translation mode for stdout to BINARY */
2554 _setmode( _fileno( fo ), O_BINARY );
2557 if ((fo = fopen(im->graphfile,"wb")) == NULL) {
2558 rrd_set_error("Opening '%s' for write: %s",im->graphfile,
2559 rrd_strerror(errno));
2563 gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
2564 if (strcmp(im->graphfile,"-") != 0)
2570 /*****************************************************
2572 *****************************************************/
2575 gdes_alloc(image_desc_t *im){
2578 if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
2579 * sizeof(graph_desc_t)))==NULL){
2580 rrd_set_error("realloc graph_descs");
2585 im->gdes[im->gdes_c-1].step=im->step;
2586 im->gdes[im->gdes_c-1].stack=0;
2587 im->gdes[im->gdes_c-1].debug=0;
2588 im->gdes[im->gdes_c-1].start=im->start;
2589 im->gdes[im->gdes_c-1].end=im->end;
2590 im->gdes[im->gdes_c-1].vname[0]='\0';
2591 im->gdes[im->gdes_c-1].data=NULL;
2592 im->gdes[im->gdes_c-1].ds_namv=NULL;
2593 im->gdes[im->gdes_c-1].data_first=0;
2594 im->gdes[im->gdes_c-1].p_data=NULL;
2595 im->gdes[im->gdes_c-1].rpnp=NULL;
2596 im->gdes[im->gdes_c-1].shift=0;
2597 im->gdes[im->gdes_c-1].col = 0x0;
2598 im->gdes[im->gdes_c-1].legend[0]='\0';
2599 im->gdes[im->gdes_c-1].rrd[0]='\0';
2600 im->gdes[im->gdes_c-1].ds=-1;
2601 im->gdes[im->gdes_c-1].p_data=NULL;
2602 im->gdes[im->gdes_c-1].yrule=DNAN;
2603 im->gdes[im->gdes_c-1].xrule=0;
2607 /* copies input untill the first unescaped colon is found
2608 or until input ends. backslashes have to be escaped as well */
2610 scan_for_col(char *input, int len, char *output)
2615 input[inp] != ':' &&
2618 if (input[inp] == '\\' &&
2619 input[inp+1] != '\0' &&
2620 (input[inp+1] == '\\' ||
2621 input[inp+1] == ':')){
2622 output[outp++] = input[++inp];
2625 output[outp++] = input[inp];
2628 output[outp] = '\0';
2631 /* Some surgery done on this function, it became ridiculously big.
2633 ** - initializing now in rrd_graph_init()
2634 ** - options parsing now in rrd_graph_options()
2635 ** - script parsing now in rrd_graph_script()
2638 rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
2642 rrd_graph_init(&im);
2643 im.graphhandle = stream;
2645 rrd_graph_options(argc,argv,&im);
2646 if (rrd_test_error()) {
2651 if (strlen(argv[optind])>=MAXPATH) {
2652 rrd_set_error("filename (including path) too long");
2656 strncpy(im.graphfile,argv[optind],MAXPATH-1);
2657 im.graphfile[MAXPATH-1]='\0';
2659 rrd_graph_script(argc,argv,&im,1);
2660 if (rrd_test_error()) {
2665 /* Everything is now read and the actual work can start */
2668 if (graph_paint(&im,prdata)==-1){
2673 /* The image is generated and needs to be output.
2674 ** Also, if needed, print a line with information about the image.
2684 /* maybe prdata is not allocated yet ... lets do it now */
2685 if ((*prdata = calloc(2,sizeof(char *)))==NULL) {
2686 rrd_set_error("malloc imginfo");
2690 if(((*prdata)[0] = malloc((strlen(im.imginfo)+200+strlen(im.graphfile))*sizeof(char)))
2692 rrd_set_error("malloc imginfo");
2695 filename=im.graphfile+strlen(im.graphfile);
2696 while(filename > im.graphfile) {
2697 if (*(filename-1)=='/' || *(filename-1)=='\\' ) break;
2701 sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
2708 rrd_graph_init(image_desc_t *im)
2715 #ifdef HAVE_SETLOCALE
2716 setlocale(LC_TIME,"");
2719 im->xlab_user.minsec = -1;
2725 im->ylegend[0] = '\0';
2726 im->title[0] = '\0';
2729 im->unitsexponent= 9999;
2735 im->logarithmic = 0;
2736 im->ygridstep = DNAN;
2737 im->draw_x_grid = 1;
2738 im->draw_y_grid = 1;
2743 im->canvas = gfx_new_canvas();
2744 im->grid_dash_on = 1;
2745 im->grid_dash_off = 1;
2747 for(i=0;i<DIM(graph_col);i++)
2748 im->graph_col[i]=graph_col[i];
2752 windir = getenv("windir");
2753 /* %windir% is something like D:\windows or C:\winnt */
2754 if (windir != NULL) {
2755 strcpy(rrd_win_default_font,windir);
2756 strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
2757 for(i=0;i<DIM(text_prop);i++)
2758 text_prop[i].font = rrd_win_default_font;
2762 for(i=0;i<DIM(text_prop);i++){
2763 im->text_prop[i].size = text_prop[i].size;
2764 im->text_prop[i].font = text_prop[i].font;
2769 rrd_graph_options(int argc, char *argv[],image_desc_t *im)
2772 char *parsetime_error = NULL;
2773 char scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
2774 time_t start_tmp=0,end_tmp=0;
2776 struct rrd_time_value start_tv, end_tv;
2779 parsetime("end-24h", &start_tv);
2780 parsetime("now", &end_tv);
2783 static struct option long_options[] =
2785 {"start", required_argument, 0, 's'},
2786 {"end", required_argument, 0, 'e'},
2787 {"x-grid", required_argument, 0, 'x'},
2788 {"y-grid", required_argument, 0, 'y'},
2789 {"vertical-label",required_argument,0,'v'},
2790 {"width", required_argument, 0, 'w'},
2791 {"height", required_argument, 0, 'h'},
2792 {"interlaced", no_argument, 0, 'i'},
2793 {"upper-limit",required_argument, 0, 'u'},
2794 {"lower-limit",required_argument, 0, 'l'},
2795 {"rigid", no_argument, 0, 'r'},
2796 {"base", required_argument, 0, 'b'},
2797 {"logarithmic",no_argument, 0, 'o'},
2798 {"color", required_argument, 0, 'c'},
2799 {"font", required_argument, 0, 'n'},
2800 {"title", required_argument, 0, 't'},
2801 {"imginfo", required_argument, 0, 'f'},
2802 {"imgformat", required_argument, 0, 'a'},
2803 {"lazy", no_argument, 0, 'z'},
2804 {"zoom", required_argument, 0, 'm'},
2805 {"no-legend", no_argument, 0, 'g'},
2806 {"force-rules-legend",no_argument,0, 'F'},
2807 {"only-graph", no_argument, 0, 'j'},
2808 {"alt-y-grid", no_argument, 0, 'Y'},
2809 {"no-minor", no_argument, 0, 'I'},
2810 {"alt-autoscale", no_argument, 0, 'A'},
2811 {"alt-autoscale-max", no_argument, 0, 'M'},
2812 {"units-exponent",required_argument, 0, 'X'},
2813 {"step", required_argument, 0, 'S'},
2814 {"no-gridfit", no_argument, 0, 'N'},
2816 int option_index = 0;
2820 opt = getopt_long(argc, argv,
2821 "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:N",
2822 long_options, &option_index);
2829 im->extra_flags |= NOMINOR;
2832 im->extra_flags |= ALTYGRID;
2835 im->extra_flags |= ALTAUTOSCALE;
2838 im->extra_flags |= ALTAUTOSCALE_MAX;
2841 im->extra_flags |= ONLY_GRAPH;
2844 im->extra_flags |= NOLEGEND;
2847 im->extra_flags |= FORCE_RULES_LEGEND;
2850 im->unitsexponent = atoi(optarg);
2853 im->step = atoi(optarg);
2859 if ((parsetime_error = parsetime(optarg, &start_tv))) {
2860 rrd_set_error( "start time: %s", parsetime_error );
2865 if ((parsetime_error = parsetime(optarg, &end_tv))) {
2866 rrd_set_error( "end time: %s", parsetime_error );
2871 if(strcmp(optarg,"none") == 0){
2877 "%10[A-Z]:%ld:%10[A-Z]:%ld:%10[A-Z]:%ld:%ld:%n",
2879 &im->xlab_user.gridst,
2881 &im->xlab_user.mgridst,
2883 &im->xlab_user.labst,
2884 &im->xlab_user.precis,
2885 &stroff) == 7 && stroff != 0){
2886 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
2887 if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
2888 rrd_set_error("unknown keyword %s",scan_gtm);
2890 } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
2891 rrd_set_error("unknown keyword %s",scan_mtm);
2893 } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
2894 rrd_set_error("unknown keyword %s",scan_ltm);
2897 im->xlab_user.minsec = 1;
2898 im->xlab_user.stst = im->xlab_form;
2900 rrd_set_error("invalid x-grid format");
2906 if(strcmp(optarg,"none") == 0){
2914 &im->ylabfact) == 2) {
2915 if(im->ygridstep<=0){
2916 rrd_set_error("grid step must be > 0");
2918 } else if (im->ylabfact < 1){
2919 rrd_set_error("label factor must be > 0");
2923 rrd_set_error("invalid y-grid format");
2928 strncpy(im->ylegend,optarg,150);
2929 im->ylegend[150]='\0';
2932 im->maxval = atof(optarg);
2935 im->minval = atof(optarg);
2938 im->base = atol(optarg);
2939 if(im->base != 1024 && im->base != 1000 ){
2940 rrd_set_error("the only sensible value for base apart from 1000 is 1024");
2945 long_tmp = atol(optarg);
2946 if (long_tmp < 10) {
2947 rrd_set_error("width below 10 pixels");
2950 im->xsize = long_tmp;
2953 long_tmp = atol(optarg);
2954 if (long_tmp < 10) {
2955 rrd_set_error("height below 10 pixels");
2958 im->ysize = long_tmp;
2961 im->canvas->interlaced = 1;
2967 im->imginfo = optarg;
2970 if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
2971 rrd_set_error("unsupported graphics format '%s'",optarg);
2979 im->logarithmic = 1;
2980 if (isnan(im->minval))
2986 col_nam,&color) == 2){
2988 if((ci=grc_conv(col_nam)) != -1){
2989 im->graph_col[ci]=color;
2991 rrd_set_error("invalid color name '%s'",col_nam);
2994 rrd_set_error("invalid color def format");
2999 /* originally this used char *prop = "" and
3000 ** char *font = "dummy" however this results
3001 ** in a SEG fault, at least on RH7.1
3003 ** The current implementation isn't proper
3004 ** either, font is never freed and prop uses
3005 ** a fixed width string
3014 prop,&size,font) == 3){
3016 if((sindex=text_prop_conv(prop)) != -1){
3017 im->text_prop[sindex].size=size;
3018 im->text_prop[sindex].font=font;
3019 if (sindex==0) { /* the default */
3020 im->text_prop[TEXT_PROP_TITLE].size=size;
3021 im->text_prop[TEXT_PROP_TITLE].font=font;
3022 im->text_prop[TEXT_PROP_AXIS].size=size;
3023 im->text_prop[TEXT_PROP_AXIS].font=font;
3024 im->text_prop[TEXT_PROP_UNIT].size=size;
3025 im->text_prop[TEXT_PROP_UNIT].font=font;
3026 im->text_prop[TEXT_PROP_LEGEND].size=size;
3027 im->text_prop[TEXT_PROP_LEGEND].font=font;
3030 rrd_set_error("invalid fonttag '%s'",prop);
3034 rrd_set_error("invalid text property format");
3040 im->canvas->zoom = atof(optarg);
3041 if (im->canvas->zoom <= 0.0) {
3042 rrd_set_error("zoom factor must be > 0");
3047 strncpy(im->title,optarg,150);
3048 im->title[150]='\0';
3053 rrd_set_error("unknown option '%c'", optopt);
3055 rrd_set_error("unknown option '%s'",argv[optind-1]);
3060 if (optind >= argc) {
3061 rrd_set_error("missing filename");
3065 if (im->logarithmic == 1 && (im->minval <= 0 || isnan(im->minval))){
3066 rrd_set_error("for a logarithmic yaxis you must specify a lower-limit > 0");
3070 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
3071 /* error string is set in parsetime.c */
3075 if (start_tmp < 3600*24*365*10){
3076 rrd_set_error("the first entry to fetch should be after 1980 (%ld)",start_tmp);
3080 if (end_tmp < start_tmp) {
3081 rrd_set_error("start (%ld) should be less than end (%ld)",
3082 start_tmp, end_tmp);
3086 im->start = start_tmp;
3088 im->step = max((long)im->step, (im->end-im->start)/im->xsize);
3092 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
3094 if ((im->gdes[im->gdes_c-1].vidx=find_var(im,varname))==-1) {
3095 rrd_set_error("Unknown variable '%s' in %s",varname,err);
3101 rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
3104 graph_desc_t *gdp=&im->gdes[im->gdes_c-1];
3106 color=strstr(var,"#");
3109 rrd_set_error("Found no color in %s",err);
3118 rest=strstr(color,":");
3126 sscanf(color,"#%6lx%n",&col,&n);
3127 col = (col << 8) + 0xff /* shift left by 8 */;
3128 if (n!=7) rrd_set_error("Color problem in %s",err);
3131 sscanf(color,"#%8lx%n",&col,&n);
3134 rrd_set_error("Color problem in %s",err);
3136 if (rrd_test_error()) return 0;
3142 rrd_graph_legend(graph_desc_t *gdp, char *line)
3146 i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
3148 return (strlen(&line[i])==0);
3152 int bad_format(char *fmt) {
3156 while (*ptr != '\0')
3157 if (*ptr++ == '%') {
3159 /* line cannot end with percent char */
3160 if (*ptr == '\0') return 1;
3162 /* '%s', '%S' and '%%' are allowed */
3163 if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
3165 /* or else '% 6.2lf' and such are allowed */
3168 /* optional padding character */
3169 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
3171 /* This should take care of 'm.n' with all three optional */
3172 while (*ptr >= '0' && *ptr <= '9') ptr++;
3173 if (*ptr == '.') ptr++;
3174 while (*ptr >= '0' && *ptr <= '9') ptr++;
3176 /* Either 'le', 'lf' or 'lg' must follow here */
3177 if (*ptr++ != 'l') return 1;
3178 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
3189 vdef_parse(gdes,str)
3190 struct graph_desc_t *gdes;
3193 /* A VDEF currently is either "func" or "param,func"
3194 * so the parsing is rather simple. Change if needed.
3201 sscanf(str,"%le,%29[A-Z]%n",¶m,func,&n);
3202 if (n== (int)strlen(str)) { /* matched */
3206 sscanf(str,"%29[A-Z]%n",func,&n);
3207 if (n== (int)strlen(str)) { /* matched */
3210 rrd_set_error("Unknown function string '%s' in VDEF '%s'"
3217 if (!strcmp("PERCENT",func)) gdes->vf.op = VDEF_PERCENT;
3218 else if (!strcmp("MAXIMUM",func)) gdes->vf.op = VDEF_MAXIMUM;
3219 else if (!strcmp("AVERAGE",func)) gdes->vf.op = VDEF_AVERAGE;
3220 else if (!strcmp("MINIMUM",func)) gdes->vf.op = VDEF_MINIMUM;
3221 else if (!strcmp("TOTAL", func)) gdes->vf.op = VDEF_TOTAL;
3222 else if (!strcmp("FIRST", func)) gdes->vf.op = VDEF_FIRST;
3223 else if (!strcmp("LAST", func)) gdes->vf.op = VDEF_LAST;
3225 rrd_set_error("Unknown function '%s' in VDEF '%s'\n"
3232 switch (gdes->vf.op) {
3234 if (isnan(param)) { /* no parameter given */
3235 rrd_set_error("Function '%s' needs parameter in VDEF '%s'\n"
3241 if (param>=0.0 && param<=100.0) {
3242 gdes->vf.param = param;
3243 gdes->vf.val = DNAN; /* undefined */
3244 gdes->vf.when = 0; /* undefined */
3246 rrd_set_error("Parameter '%f' out of range in VDEF '%s'\n"
3260 gdes->vf.param = DNAN;
3261 gdes->vf.val = DNAN;
3264 rrd_set_error("Function '%s' needs no parameter in VDEF '%s'\n"
3281 graph_desc_t *src,*dst;
3285 dst = &im->gdes[gdi];
3286 src = &im->gdes[dst->vidx];
3287 data = src->data + src->ds;
3288 steps = (src->end - src->start) / src->step;
3291 printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
3298 switch (dst->vf.op) {
3299 case VDEF_PERCENT: {
3300 rrd_value_t * array;
3304 if ((array = malloc(steps*sizeof(double)))==NULL) {
3305 rrd_set_error("malloc VDEV_PERCENT");
3308 for (step=0;step < steps; step++) {
3309 array[step]=data[step*src->ds_cnt];
3311 qsort(array,step,sizeof(double),vdef_percent_compar);
3313 field = (steps-1)*dst->vf.param/100;
3314 dst->vf.val = array[field];
3315 dst->vf.when = 0; /* no time component */
3318 for(step=0;step<steps;step++)
3319 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');
3325 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3326 if (step == steps) {
3330 dst->vf.val = data[step*src->ds_cnt];
3331 dst->vf.when = src->start + (step+1)*src->step;
3333 while (step != steps) {
3334 if (finite(data[step*src->ds_cnt])) {
3335 if (data[step*src->ds_cnt] > dst->vf.val) {
3336 dst->vf.val = data[step*src->ds_cnt];
3337 dst->vf.when = src->start + (step+1)*src->step;
3344 case VDEF_AVERAGE: {
3347 for (step=0;step<steps;step++) {
3348 if (finite(data[step*src->ds_cnt])) {
3349 sum += data[step*src->ds_cnt];
3354 if (dst->vf.op == VDEF_TOTAL) {
3355 dst->vf.val = sum*src->step;
3356 dst->vf.when = cnt*src->step; /* not really "when" */
3358 dst->vf.val = sum/cnt;
3359 dst->vf.when = 0; /* no time component */
3369 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3370 if (step == steps) {
3374 dst->vf.val = data[step*src->ds_cnt];
3375 dst->vf.when = src->start + (step+1)*src->step;
3377 while (step != steps) {
3378 if (finite(data[step*src->ds_cnt])) {
3379 if (data[step*src->ds_cnt] < dst->vf.val) {
3380 dst->vf.val = data[step*src->ds_cnt];
3381 dst->vf.when = src->start + (step+1)*src->step;
3388 /* The time value returned here is one step before the
3389 * actual time value. This is the start of the first
3393 while (step != steps && isnan(data[step*src->ds_cnt])) step++;
3394 if (step == steps) { /* all entries were NaN */
3398 dst->vf.val = data[step*src->ds_cnt];
3399 dst->vf.when = src->start + step*src->step;
3403 /* The time value returned here is the
3404 * actual time value. This is the end of the last
3408 while (step >= 0 && isnan(data[step*src->ds_cnt])) step--;
3409 if (step < 0) { /* all entries were NaN */
3413 dst->vf.val = data[step*src->ds_cnt];
3414 dst->vf.when = src->start + (step+1)*src->step;
3421 /* NaN < -INF < finite_values < INF */
3423 vdef_percent_compar(a,b)
3426 /* Equality is not returned; this doesn't hurt except
3427 * (maybe) for a little performance.
3430 /* First catch NaN values. They are smallest */
3431 if (isnan( *(double *)a )) return -1;
3432 if (isnan( *(double *)b )) return 1;
3434 /* NaN doesn't reach this part so INF and -INF are extremes.
3435 * The sign from isinf() is compatible with the sign we return
3437 if (isinf( *(double *)a )) return isinf( *(double *)a );
3438 if (isinf( *(double *)b )) return isinf( *(double *)b );
3440 /* If we reach this, both values must be finite */
3441 if ( *(double *)a < *(double *)b ) return -1; else return 1;