6 #define index cairo_index
10 #include <cairo-svg.h>
12 #include <pango/pangocairo.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
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__
40 #define MGRIDWIDTH 0.6
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,
49 enum txa_en { TXA_LEFT = 0, TXA_RIGHT, TXA_CENTER, TXA_JUSTIFIED };
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 */
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 */
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 {
87 typedef struct text_prop_t {
93 typedef struct vdef_t {
95 double param; /* parameter for function, if applicable */
96 double val; /* resulting value */
97 time_t when; /* timestamp, if applicable */
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 */
113 typedef struct ygrid_scale_t { /* y axis grid scaling info */
119 /* sensible y label intervals ...*/
121 typedef struct ylab_t {
122 double grid; /* grid spacing */
123 int lfac[4]; /* associated label spacing */
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. */
130 #define FMT_LEG_LEN 200
132 #define FMT_LEG_LEN 2000
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 */
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
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
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 */
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;
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 */
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 info_t *grinfo; /* root pointer to extra graph info */
248 info_t *grinfo_current; /* pointing to current entry */
260 enum gfx_if_en if_conv(
262 enum tmt_en tmt_conv(
264 enum grc_en grc_conv(
266 enum text_prop_en text_prop_conv(
294 long find_var_wrapper(
303 time_t find_first_time(
307 time_t find_next_time(
316 int calc_horizontal_grid(
318 int draw_horizontal_grid(
320 int horizontal_log_grid(
341 void rrd_graph_options(
345 void rrd_graph_script(
358 struct graph_desc_t *,
363 int vdef_percent_compar(
366 int graph_size_location(
371 /* create a new line */
381 void gfx_dashed_line(
392 /* create a new area */
403 /* add a point to a line or to an area */
409 /* close current path so it ends at the same point as it started */
414 /* create a text node */
424 enum gfx_h_align_en h_align,
425 enum gfx_v_align_en v_align,
428 /* measure width of a text string */
429 double gfx_get_text_width(
439 gfx_color_t gfx_hex_to_col(