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 #include "rrd_tool.h"
15 #include "rrd_rpncalc.h"
18 #define ALTYGRID 0x01 /* use alternative y grid algorithm */
19 #define ALTAUTOSCALE 0x02 /* use alternative algorithm to find lower and upper bounds */
20 #define ALTAUTOSCALE_MIN 0x04 /* use alternative algorithm to find lower bounds */
21 #define ALTAUTOSCALE_MAX 0x08 /* use alternative algorithm to find upper bounds */
22 #define NOLEGEND 0x10 /* use no legend */
23 #define NOMINOR 0x20 /* Turn off minor gridlines */
24 #define ONLY_GRAPH 0x40 /* use only graph */
25 #define FORCE_RULES_LEGEND 0x80 /* force printing of HRULE and VRULE legend */
27 #define FORCE_UNITS 0x100 /* mask for all FORCE_UNITS_* flags */
28 #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) */
30 #define FULL_SIZE_MODE 0x200 /* -width and -height indicate the total size of the image */
32 enum tmt_en { TMT_SECOND = 0, TMT_MINUTE, TMT_HOUR, TMT_DAY,
33 TMT_WEEK, TMT_MONTH, TMT_YEAR
34 };
36 enum grc_en { GRC_CANVAS = 0, GRC_BACK, GRC_SHADEA, GRC_SHADEB,
37 GRC_GRID, GRC_MGRID, GRC_FONT, GRC_ARROW, GRC_AXIS, GRC_FRAME, __GRC_END__
38 };
40 #define MGRIDWIDTH 0.6
41 #define GRIDWIDTH 0.4
43 enum gf_en { GF_PRINT = 0, GF_GPRINT, GF_COMMENT, GF_HRULE, GF_VRULE, GF_LINE,
44 GF_AREA, GF_STACK, GF_TICK, GF_TEXTALIGN,
45 GF_DEF, GF_CDEF, GF_VDEF, GF_SHIFT,
46 GF_XPORT
47 };
49 enum txa_en { TXA_LEFT = 0, TXA_RIGHT, TXA_CENTER, TXA_JUSTIFIED };
51 enum vdef_op_en {
52 VDEF_MAXIMUM = 0 /* like the MAX in (G)PRINT */
53 , VDEF_MINIMUM /* like the MIN in (G)PRINT */
54 , VDEF_AVERAGE /* like the AVERAGE in (G)PRINT */
55 , VDEF_STDEV /* the standard deviation */
56 , VDEF_PERCENT /* Nth percentile */
57 , VDEF_TOTAL /* average multiplied by time */
58 , VDEF_FIRST /* first non-unknown value and time */
59 , VDEF_LAST /* last non-unknown value and time */
60 , VDEF_LSLSLOPE /* least squares line slope */
61 , VDEF_LSLINT /* least squares line y_intercept */
62 , VDEF_LSLCORREL /* least squares line correlation coefficient */
63 };
64 enum text_prop_en { TEXT_PROP_DEFAULT = 0, /* default settings */
65 TEXT_PROP_TITLE, /* properties for the title */
66 TEXT_PROP_AXIS, /* for the numbers next to the axis */
67 TEXT_PROP_UNIT, /* for the vertical unit description */
68 TEXT_PROP_LEGEND, /* fot the legend below the graph */
69 TEXT_PROP_LAST
70 };
73 enum gfx_if_en { IF_PNG = 0, IF_SVG, IF_EPS, IF_PDF };
74 enum gfx_en { GFX_LINE = 0, GFX_AREA, GFX_TEXT };
75 enum gfx_h_align_en { GFX_H_NULL = 0, GFX_H_LEFT, GFX_H_RIGHT, GFX_H_CENTER };
76 enum gfx_v_align_en { GFX_V_NULL = 0, GFX_V_TOP, GFX_V_BOTTOM, GFX_V_CENTER };
78 /* cairo color components */
79 typedef struct gfx_color_t {
80 double red;
81 double green;
82 double blue;
83 double alpha;
84 } gfx_color_t;
87 typedef struct text_prop_t {
88 double size;
89 char font[1024];
90 } text_prop_t;
93 typedef struct vdef_t {
94 enum vdef_op_en op;
95 double param; /* parameter for function, if applicable */
96 double val; /* resulting value */
97 time_t when; /* timestamp, if applicable */
98 } vdef_t;
100 typedef struct xlab_t {
101 long minsec; /* minimum sec per pix */
102 long length; /* number of secs on the image */
103 enum tmt_en gridtm; /* grid interval in what ? */
104 long gridst; /* how many whats per grid */
105 enum tmt_en mgridtm; /* label interval in what ? */
106 long mgridst; /* how many whats per label */
107 enum tmt_en labtm; /* label interval in what ? */
108 long labst; /* how many whats per label */
109 long precis; /* label precision -> label placement */
110 char *stst; /* strftime string */
111 } xlab_t;
113 typedef struct ygrid_scale_t { /* y axis grid scaling info */
114 double gridstep;
115 int labfact;
116 char labfmt[64];
117 } ygrid_scale_t;
119 /* sensible y label intervals ...*/
121 typedef struct ylab_t {
122 double grid; /* grid spacing */
123 int lfac[4]; /* associated label spacing */
124 } ylab_t;
126 /* this structure describes the elements which can make up a graph.
127 because they are quite diverse, not all elements will use all the
128 possible parts of the structure. */
129 #ifdef HAVE_SNPRINTF
130 #define FMT_LEG_LEN 200
131 #else
132 #define FMT_LEG_LEN 2000
133 #endif
135 typedef struct graph_desc_t {
136 enum gf_en gf; /* graphing function */
137 int stack; /* boolean */
138 int debug; /* boolean */
139 char vname[MAX_VNAME_LEN + 1]; /* name of the variable */
140 long vidx; /* gdes reference */
141 char rrd[1024]; /* name of the rrd_file containing data */
142 char ds_nam[DS_NAM_SIZE]; /* data source name */
143 long ds; /* data source number */
144 enum cf_en cf; /* consolidation function */
145 enum cf_en cf_reduce; /* consolidation function for reduce_data() */
146 struct gfx_color_t col; /* graph color */
147 char format[FMT_LEG_LEN + 5]; /* format for PRINT AND GPRINT */
148 char legend[FMT_LEG_LEN + 5]; /* legend */
149 int strftm; /* should the VDEF legend be formated with strftime */
150 double leg_x, leg_y; /* location of legend */
151 double yrule; /* value for y rule line and for VDEF */
152 time_t xrule; /* time for x rule line and for VDEF */
153 vdef_t vf; /* instruction for VDEF function */
154 rpnp_t *rpnp; /* instructions for CDEF function */
156 /* SHIFT implementation */
157 int shidx; /* gdes reference for offset (-1 --> constant) */
158 time_t shval; /* offset if shidx is -1 */
159 time_t shift; /* current shift applied */
161 /* description of data fetched for the graph element */
162 time_t start, end; /* timestaps for first and last data element */
163 time_t start_orig, end_orig; /* timestaps for first and last data element */
164 unsigned long step; /* time between samples */
165 unsigned long step_orig; /* time between samples */
166 unsigned long ds_cnt; /* how many data sources are there in the fetch */
167 long data_first; /* first pointer to this data */
168 char **ds_namv; /* name of datasources in the fetch. */
169 rrd_value_t *data; /* the raw data drawn from the rrd */
170 rrd_value_t *p_data; /* processed data, xsize elments */
171 double linewidth; /* linewideth */
173 /* dashed line stuff */
174 int dash; /* boolean, draw dashed line? */
175 double *p_dashes; /* pointer do dash array which keeps the lengths of dashes */
176 int ndash; /* number of dash segments */
177 double offset; /* dash offset along the line */
179 enum txa_en txtalign; /* change default alignment strategy for text */
180 } graph_desc_t;
182 typedef struct image_desc_t {
184 /* configuration of graph */
186 char graphfile[MAXPATH]; /* filename for graphic */
187 long xsize, ysize; /* graph area size in pixels */
188 struct gfx_color_t graph_col[__GRC_END__]; /* real colors for the graph */
189 text_prop_t text_prop[TEXT_PROP_LAST]; /* text properties */
190 char ylegend[210]; /* legend along the yaxis */
191 char title[210]; /* title for graph */
192 char watermark[110]; /* watermark for graph */
193 int draw_x_grid; /* no x-grid at all */
194 int draw_y_grid; /* no x-grid at all */
195 double grid_dash_on, grid_dash_off;
196 xlab_t xlab_user; /* user defined labeling for xaxis */
197 char xlab_form[210]; /* format for the label on the xaxis */
199 double ygridstep; /* user defined step for y grid */
200 int ylabfact; /* every how many y grid shall a label be written ? */
201 double tabwidth; /* tabwdith */
202 time_t start, end; /* what time does the graph cover */
203 unsigned long step; /* any preference for the default step ? */
204 rrd_value_t minval, maxval; /* extreme values in the data */
205 int rigid; /* do not expand range even with
206 values outside */
207 ygrid_scale_t ygrid_scale; /* calculated y axis grid info */
208 int gridfit; /* adjust y-axis range etc so all
209 grindlines falls in integer pixel values */
210 char *imginfo; /* construct an <IMG ... tag and return
211 as first retval */
212 enum gfx_if_en imgformat; /* image format */
213 int lazy; /* only update the image if there is
214 reasonable probablility that the
215 existing one is out of date */
216 int slopemode; /* connect the dots of the curve directly, not using a stair */
217 int logarithmic; /* scale the yaxis logarithmic */
218 double force_scale_min; /* Force a scale--min */
219 double force_scale_max; /* Force a scale--max */
221 /* status information */
222 int with_markup;
223 long xorigin, yorigin; /* where is (0,0) of the graph */
224 long ximg, yimg; /* total size of the image */
225 size_t rendered_image_size;
226 double zoom;
227 double magfact; /* numerical magnitude */
228 long base; /* 1000 or 1024 depending on what we graph */
229 char symbol; /* magnitude symbol for y-axis */
230 float viewfactor; /* how should the numbers on the y-axis be scaled for viewing ? */
231 int unitsexponent; /* 10*exponent for units on y-asis */
232 int unitslength; /* width of the yaxis labels */
233 int forceleftspace; /* do not kill the space to the left of the y-axis if there is no grid */
235 int extra_flags; /* flags for boolean options */
236 /* data elements */
238 unsigned char *rendered_image;
239 long prt_c; /* number of print elements */
240 long gdes_c; /* number of graphics elements */
241 graph_desc_t *gdes; /* points to an array of graph elements */
242 cairo_surface_t *surface; /* graphics library */
243 cairo_t *cr; /* drawin context */
244 cairo_font_options_t *font_options; /* cairo font options */
245 cairo_antialias_t graph_antialias; /* antialiasing for the graph */
247 rrd_info_t *grinfo; /* root pointer to extra graph info */
248 rrd_info_t *grinfo_current; /* pointing to current entry */
249 } image_desc_t;
251 /* Prototypes */
252 int xtr(
253 image_desc_t *,
254 time_t);
255 double ytr(
256 image_desc_t *,
257 double);
258 enum gf_en gf_conv(
259 char *);
260 enum gfx_if_en if_conv(
261 char *);
262 enum tmt_en tmt_conv(
263 char *);
264 enum grc_en grc_conv(
265 char *);
266 enum text_prop_en text_prop_conv(
267 char *);
268 int im_free(
269 image_desc_t *);
270 void auto_scale(
271 image_desc_t *,
272 double *,
273 char **,
274 double *);
275 void si_unit(
276 image_desc_t *);
277 void expand_range(
278 image_desc_t *);
279 void apply_gridfit(
280 image_desc_t *);
281 void reduce_data(
282 enum cf_en,
283 unsigned long,
284 time_t *,
285 time_t *,
286 unsigned long *,
287 unsigned long *,
288 rrd_value_t **);
289 int data_fetch(
290 image_desc_t *);
291 long find_var(
292 image_desc_t *,
293 char *);
294 long find_var_wrapper(
295 void *arg1,
296 char *key);
297 long lcd(
298 long *);
299 int data_calc(
300 image_desc_t *);
301 int data_proc(
302 image_desc_t *);
303 time_t find_first_time(
304 time_t,
305 enum tmt_en,
306 long);
307 time_t find_next_time(
308 time_t,
309 enum tmt_en,
310 long);
311 int print_calc(
312 image_desc_t *);
313 int leg_place(
314 image_desc_t *,
315 int *);
316 int calc_horizontal_grid(
317 image_desc_t *);
318 int draw_horizontal_grid(
319 image_desc_t *);
320 int horizontal_log_grid(
321 image_desc_t *);
322 void vertical_grid(
323 image_desc_t *);
324 void axis_paint(
325 image_desc_t *);
326 void grid_paint(
327 image_desc_t *);
328 int lazy_check(
329 image_desc_t *);
330 int graph_paint(
331 image_desc_t *);
333 int gdes_alloc(
334 image_desc_t *);
335 int scan_for_col(
336 const char *const,
337 int,
338 char *const);
339 void rrd_graph_init(
340 image_desc_t *);
341 void rrd_graph_options(
342 int,
343 char **,
344 image_desc_t *);
345 void rrd_graph_script(
346 int,
347 char **,
348 image_desc_t *,
349 int);
350 int rrd_graph_color(
351 image_desc_t *,
352 char *,
353 char *,
354 int);
355 int bad_format(
356 char *);
357 int vdef_parse(
358 struct graph_desc_t *,
359 const char *const);
360 int vdef_calc(
361 image_desc_t *,
362 int);
363 int vdef_percent_compar(
364 const void *,
365 const void *);
366 int graph_size_location(
367 image_desc_t *,
368 int);
371 /* create a new line */
372 void gfx_line(
373 image_desc_t *im,
374 double X0,
375 double Y0,
376 double X1,
377 double Y1,
378 double width,
379 gfx_color_t color);
381 void gfx_dashed_line(
382 image_desc_t *im,
383 double X0,
384 double Y0,
385 double X1,
386 double Y1,
387 double width,
388 gfx_color_t color,
389 double dash_on,
390 double dash_off);
392 /* create a new area */
393 void gfx_new_area(
394 image_desc_t *im,
395 double X0,
396 double Y0,
397 double X1,
398 double Y1,
399 double X2,
400 double Y2,
401 gfx_color_t color);
403 /* add a point to a line or to an area */
404 void gfx_add_point(
405 image_desc_t *im,
406 double x,
407 double y);
409 /* close current path so it ends at the same point as it started */
410 void gfx_close_path(
411 image_desc_t *im);
414 /* create a text node */
415 void gfx_text(
416 image_desc_t *im,
417 double x,
418 double y,
419 gfx_color_t color,
420 char *font,
421 double size,
422 double tabwidth,
423 double angle,
424 enum gfx_h_align_en h_align,
425 enum gfx_v_align_en v_align,
426 const char *text);
428 /* measure width of a text string */
429 double gfx_get_text_width(
430 image_desc_t *im,
431 double start,
432 char *font,
433 double size,
434 double tabwidth,
435 char *text);
438 /* convert color */
439 gfx_color_t gfx_hex_to_col(
440 long unsigned int);
442 void gfx_line_fit(
443 image_desc_t *im,
444 double *x,
445 double *y);
447 void gfx_area_fit(
448 image_desc_t *im,
449 double *x,
450 double *y);
452 #endif
454 void grinfo_push(
455 image_desc_t *im,
456 char *key,
457 rrd_info_type_t type,
458 rrd_infoval_t value);