1 #ifndef _RRD_GRAPH_H
2 #define _RRD_GRAPH_H
4 #define y0 cairo_y0
5 #define y1 cairo_y1
6 #define index cairo_index
8 #include <cairo.h>
9 #include <cairo-pdf.h>
10 #include <cairo-svg.h>
11 #include <cairo-ps.h>
12 #include <pango/pangocairo.h>
14 #ifdef HAVE_LIBGEN_H
15 /* for basename */
16 # include <libgen.h>
17 #endif
19 #include "rrd_tool.h"
20 #include "rrd_rpncalc.h"
22 #ifdef WIN32
23 # include <windows.h>
24 # define MAXPATH MAX_PATH
25 #endif
27 #define ALTYGRID 0x01 /* use alternative y grid algorithm */
28 #define ALTAUTOSCALE 0x02 /* use alternative algorithm to find lower and upper bounds */
29 #define ALTAUTOSCALE_MIN 0x04 /* use alternative algorithm to find lower bounds */
30 #define ALTAUTOSCALE_MAX 0x08 /* use alternative algorithm to find upper bounds */
31 #define NOLEGEND 0x10 /* use no legend */
32 #define NOMINOR 0x20 /* Turn off minor gridlines */
33 #define ONLY_GRAPH 0x40 /* use only graph */
34 #define FORCE_RULES_LEGEND 0x80 /* force printing of HRULE and VRULE legend */
36 #define FORCE_UNITS 0x100 /* mask for all FORCE_UNITS_* flags */
37 #define FORCE_UNITS_SI 0x100 /* force use of SI units in Y axis (no effect in linear graph, SI instead of E in log graph) */
39 #define FULL_SIZE_MODE 0x200 /* -width and -height indicate the total size of the image */
40 #define NO_RRDTOOL_TAG 0x400 /* disable the rrdtool tag */
42 enum tmt_en { TMT_SECOND = 0, TMT_MINUTE, TMT_HOUR, TMT_DAY,
43 TMT_WEEK, TMT_MONTH, TMT_YEAR
44 };
46 enum grc_en { GRC_CANVAS = 0, GRC_BACK, GRC_SHADEA, GRC_SHADEB,
47 GRC_GRID, GRC_MGRID, GRC_FONT, GRC_ARROW, GRC_AXIS, GRC_FRAME, __GRC_END__
48 };
50 #define MGRIDWIDTH 0.6
51 #define GRIDWIDTH 0.4
53 enum gf_en { GF_PRINT = 0, GF_GPRINT, GF_COMMENT, GF_HRULE, GF_VRULE, GF_LINE,
54 GF_AREA, GF_STACK, GF_TICK, GF_TEXTALIGN,
55 GF_DEF, GF_CDEF, GF_VDEF, GF_SHIFT,
56 GF_XPORT
57 };
59 enum txa_en { TXA_LEFT = 0, TXA_RIGHT, TXA_CENTER, TXA_JUSTIFIED };
61 enum vdef_op_en {
62 VDEF_MAXIMUM = 0 /* like the MAX in (G)PRINT */
63 , VDEF_MINIMUM /* like the MIN in (G)PRINT */
64 , VDEF_AVERAGE /* like the AVERAGE in (G)PRINT */
65 , VDEF_STDEV /* the standard deviation */
66 , VDEF_PERCENT /* Nth percentile */
67 , VDEF_TOTAL /* average multiplied by time */
68 , VDEF_FIRST /* first non-unknown value and time */
69 , VDEF_LAST /* last non-unknown value and time */
70 , VDEF_LSLSLOPE /* least squares line slope */
71 , VDEF_LSLINT /* least squares line y_intercept */
72 , VDEF_LSLCORREL /* least squares line correlation coefficient */
73 };
74 enum text_prop_en {
75 TEXT_PROP_DEFAULT = 0, /* default settings */
76 TEXT_PROP_TITLE, /* properties for the title */
77 TEXT_PROP_AXIS, /* for the numbers next to the axis */
78 TEXT_PROP_UNIT, /* for the vertical unit description */
79 TEXT_PROP_LEGEND, /* for the legend below the graph */
80 TEXT_PROP_WATERMARK, /* for the little text to the side of the graph */
81 TEXT_PROP_LAST
82 };
85 enum gfx_if_en { IF_PNG = 0, IF_SVG, IF_EPS, IF_PDF };
86 enum gfx_en { GFX_LINE = 0, GFX_AREA, GFX_TEXT };
87 enum gfx_h_align_en { GFX_H_NULL = 0, GFX_H_LEFT, GFX_H_RIGHT, GFX_H_CENTER };
88 enum gfx_v_align_en { GFX_V_NULL = 0, GFX_V_TOP, GFX_V_BOTTOM, GFX_V_CENTER };
90 /* cairo color components */
91 typedef struct gfx_color_t {
92 double red;
93 double green;
94 double blue;
95 double alpha;
96 } gfx_color_t;
99 typedef struct text_prop_t {
100 double size;
101 char font[1024];
102 PangoFontDescription *font_desc;
103 } text_prop_t;
106 typedef struct vdef_t {
107 enum vdef_op_en op;
108 double param; /* parameter for function, if applicable */
109 double val; /* resulting value */
110 time_t when; /* timestamp, if applicable */
111 } vdef_t;
113 typedef struct xlab_t {
114 long minsec; /* minimum sec per pix */
115 long length; /* number of secs on the image */
116 enum tmt_en gridtm; /* grid interval in what ? */
117 long gridst; /* how many whats per grid */
118 enum tmt_en mgridtm; /* label interval in what ? */
119 long mgridst; /* how many whats per label */
120 enum tmt_en labtm; /* label interval in what ? */
121 long labst; /* how many whats per label */
122 long precis; /* label precision -> label placement */
123 char *stst; /* strftime string */
124 } xlab_t;
126 typedef struct ygrid_scale_t { /* y axis grid scaling info */
127 double gridstep;
128 int labfact;
129 char labfmt[64];
130 } ygrid_scale_t;
132 /* sensible y label intervals ...*/
134 typedef struct ylab_t {
135 double grid; /* grid spacing */
136 int lfac[4]; /* associated label spacing */
137 } ylab_t;
139 /* this structure describes the elements which can make up a graph.
140 because they are quite diverse, not all elements will use all the
141 possible parts of the structure. */
142 #ifdef HAVE_SNPRINTF
143 #define FMT_LEG_LEN 200
144 #else
145 #define FMT_LEG_LEN 2000
146 #endif
148 typedef struct graph_desc_t {
149 enum gf_en gf; /* graphing function */
150 int stack; /* boolean */
151 int debug; /* boolean */
152 char vname[MAX_VNAME_LEN + 1]; /* name of the variable */
153 long vidx; /* gdes reference */
154 char rrd[1024]; /* name of the rrd_file containing data */
155 char ds_nam[DS_NAM_SIZE]; /* data source name */
156 long ds; /* data source number */
157 enum cf_en cf; /* consolidation function */
158 enum cf_en cf_reduce; /* consolidation function for reduce_data() */
159 struct gfx_color_t col; /* graph color */
160 char format[FMT_LEG_LEN + 5]; /* format for PRINT AND GPRINT */
161 char legend[FMT_LEG_LEN + 5]; /* legend */
162 int strftm; /* should the VDEF legend be formated with strftime */
163 double leg_x, leg_y; /* location of legend */
164 double yrule; /* value for y rule line and for VDEF */
165 time_t xrule; /* time for x rule line and for VDEF */
166 vdef_t vf; /* instruction for VDEF function */
167 rpnp_t *rpnp; /* instructions for CDEF function */
169 /* SHIFT implementation */
170 int shidx; /* gdes reference for offset (-1 --> constant) */
171 time_t shval; /* offset if shidx is -1 */
172 time_t shift; /* current shift applied */
174 /* description of data fetched for the graph element */
175 time_t start, end; /* timestaps for first and last data element */
176 time_t start_orig, end_orig; /* timestaps for first and last data element */
177 unsigned long step; /* time between samples */
178 unsigned long step_orig; /* time between samples */
179 unsigned long ds_cnt; /* how many data sources are there in the fetch */
180 long data_first; /* first pointer to this data */
181 char **ds_namv; /* name of datasources in the fetch. */
182 rrd_value_t *data; /* the raw data drawn from the rrd */
183 rrd_value_t *p_data; /* processed data, xsize elments */
184 double linewidth; /* linewideth */
186 /* dashed line stuff */
187 int dash; /* boolean, draw dashed line? */
188 double *p_dashes; /* pointer do dash array which keeps the lengths of dashes */
189 int ndash; /* number of dash segments */
190 double offset; /* dash offset along the line */
192 enum txa_en txtalign; /* change default alignment strategy for text */
193 } graph_desc_t;
195 typedef struct image_desc_t {
197 /* configuration of graph */
199 char graphfile[MAXPATH]; /* filename for graphic */
200 long xsize, ysize; /* graph area size in pixels */
201 struct gfx_color_t graph_col[__GRC_END__]; /* real colors for the graph */
202 text_prop_t text_prop[TEXT_PROP_LAST]; /* text properties */
203 char ylegend[210]; /* legend along the yaxis */
204 char title[210]; /* title for graph */
205 char watermark[110]; /* watermark for graph */
206 int draw_x_grid; /* no x-grid at all */
207 int draw_y_grid; /* no x-grid at all */
208 double grid_dash_on, grid_dash_off;
209 xlab_t xlab_user; /* user defined labeling for xaxis */
210 char xlab_form[210]; /* format for the label on the xaxis */
211 double second_axis_scale; /* relative to the first axis (0 to disable) */
212 double second_axis_shift; /* how much is it shifted vs the first axis */
213 char second_axis_legend[210]; /* label to put on the seond axis */
214 char second_axis_format[210]; /* format for the numbers on the scond axis */
216 double ygridstep; /* user defined step for y grid */
217 int ylabfact; /* every how many y grid shall a label be written ? */
218 double tabwidth; /* tabwdith */
219 time_t start, end; /* what time does the graph cover */
220 unsigned long step; /* any preference for the default step ? */
221 rrd_value_t minval, maxval; /* extreme values in the data */
222 int rigid; /* do not expand range even with
223 values outside */
224 ygrid_scale_t ygrid_scale; /* calculated y axis grid info */
225 int gridfit; /* adjust y-axis range etc so all
226 grindlines falls in integer pixel values */
227 char *imginfo; /* construct an <IMG ... tag and return
228 as first retval */
229 enum gfx_if_en imgformat; /* image format */
230 int lazy; /* only update the image if there is
231 reasonable probablility that the
232 existing one is out of date */
233 int slopemode; /* connect the dots of the curve directly, not using a stair */
234 int logarithmic; /* scale the yaxis logarithmic */
235 double force_scale_min; /* Force a scale--min */
236 double force_scale_max; /* Force a scale--max */
238 /* status information */
239 int with_markup;
240 long xorigin, yorigin; /* where is (0,0) of the graph */
241 long ximg, yimg; /* total size of the image */
242 size_t rendered_image_size;
243 double zoom;
244 double magfact; /* numerical magnitude */
245 long base; /* 1000 or 1024 depending on what we graph */
246 char symbol; /* magnitude symbol for y-axis */
247 float viewfactor; /* how should the numbers on the y-axis be scaled for viewing ? */
248 int unitsexponent; /* 10*exponent for units on y-asis */
249 int unitslength; /* width of the yaxis labels */
250 int forceleftspace; /* do not kill the space to the left of the y-axis if there is no grid */
252 int extra_flags; /* flags for boolean options */
253 /* data elements */
255 unsigned char *rendered_image;
256 long prt_c; /* number of print elements */
257 long gdes_c; /* number of graphics elements */
258 graph_desc_t *gdes; /* points to an array of graph elements */
259 cairo_surface_t *surface; /* graphics library */
260 cairo_t *cr; /* drawin context */
261 cairo_font_options_t *font_options; /* cairo font options */
262 cairo_antialias_t graph_antialias; /* antialiasing for the graph */
263 PangoLayout *layout; /* the pango layout we use for writing fonts */
264 rrd_info_t *grinfo; /* root pointer to extra graph info */
265 rrd_info_t *grinfo_current; /* pointing to current entry */
266 } image_desc_t;
268 /* Prototypes */
269 int xtr(
270 image_desc_t *,
271 time_t);
272 double ytr(
273 image_desc_t *,
274 double);
275 enum gf_en gf_conv(
276 char *);
277 enum gfx_if_en if_conv(
278 char *);
279 enum tmt_en tmt_conv(
280 char *);
281 enum grc_en grc_conv(
282 char *);
283 enum text_prop_en text_prop_conv(
284 char *);
285 int im_free(
286 image_desc_t *);
287 void auto_scale(
288 image_desc_t *,
289 double *,
290 char **,
291 double *);
292 void si_unit(
293 image_desc_t *);
294 void expand_range(
295 image_desc_t *);
296 void apply_gridfit(
297 image_desc_t *);
298 void reduce_data(
299 enum cf_en,
300 unsigned long,
301 time_t *,
302 time_t *,
303 unsigned long *,
304 unsigned long *,
305 rrd_value_t **);
306 int data_fetch(
307 image_desc_t *);
308 long find_var(
309 image_desc_t *,
310 char *);
311 long find_var_wrapper(
312 void *arg1,
313 char *key);
314 long lcd(
315 long *);
316 int data_calc(
317 image_desc_t *);
318 int data_proc(
319 image_desc_t *);
320 time_t find_first_time(
321 time_t,
322 enum tmt_en,
323 long);
324 time_t find_next_time(
325 time_t,
326 enum tmt_en,
327 long);
328 int print_calc(
329 image_desc_t *);
330 int leg_place(
331 image_desc_t *,
332 int *);
333 int calc_horizontal_grid(
334 image_desc_t *);
335 int draw_horizontal_grid(
336 image_desc_t *);
337 int horizontal_log_grid(
338 image_desc_t *);
339 void vertical_grid(
340 image_desc_t *);
341 void axis_paint(
342 image_desc_t *);
343 void grid_paint(
344 image_desc_t *);
345 int lazy_check(
346 image_desc_t *);
347 int graph_paint(
348 image_desc_t *);
350 int gdes_alloc(
351 image_desc_t *);
352 int scan_for_col(
353 const char *const,
354 int,
355 char *const);
356 void rrd_graph_init(
357 image_desc_t *);
359 void rrd_graph_options(
360 int,
361 char **,
362 image_desc_t *);
363 void rrd_graph_script(
364 int,
365 char **,
366 image_desc_t *,
367 int);
368 int rrd_graph_color(
369 image_desc_t *,
370 char *,
371 char *,
372 int);
373 int bad_format(
374 char *);
375 int vdef_parse(
376 struct graph_desc_t *,
377 const char *const);
378 int vdef_calc(
379 image_desc_t *,
380 int);
381 int vdef_percent_compar(
382 const void *,
383 const void *);
384 int graph_size_location(
385 image_desc_t *,
386 int);
389 /* create a new line */
390 void gfx_line(
391 image_desc_t *im,
392 double X0,
393 double Y0,
394 double X1,
395 double Y1,
396 double width,
397 gfx_color_t color);
399 void gfx_dashed_line(
400 image_desc_t *im,
401 double X0,
402 double Y0,
403 double X1,
404 double Y1,
405 double width,
406 gfx_color_t color,
407 double dash_on,
408 double dash_off);
410 /* create a new area */
411 void gfx_new_area(
412 image_desc_t *im,
413 double X0,
414 double Y0,
415 double X1,
416 double Y1,
417 double X2,
418 double Y2,
419 gfx_color_t color);
421 /* add a point to a line or to an area */
422 void gfx_add_point(
423 image_desc_t *im,
424 double x,
425 double y);
427 /* close current path so it ends at the same point as it started */
428 void gfx_close_path(
429 image_desc_t *im);
432 /* create a text node */
433 void gfx_text(
434 image_desc_t *im,
435 double x,
436 double y,
437 gfx_color_t color,
438 PangoFontDescription *font_desc,
439 double tabwidth,
440 double angle,
441 enum gfx_h_align_en h_align,
442 enum gfx_v_align_en v_align,
443 const char *text);
445 /* measure width of a text string */
446 double gfx_get_text_width(
447 image_desc_t *im,
448 double start,
449 PangoFontDescription *font_desc,
450 double tabwidth,
451 char *text);
454 /* convert color */
455 gfx_color_t gfx_hex_to_col(
456 long unsigned int);
458 void gfx_line_fit(
459 image_desc_t *im,
460 double *x,
461 double *y);
463 void gfx_area_fit(
464 image_desc_t *im,
465 double *x,
466 double *y);
468 #endif
470 void grinfo_push(
471 image_desc_t *im,
472 char *key,
473 rrd_info_type_t type, rrd_infoval_t value);