X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_graph.h;h=8e28f63fec38544333b0e92e5b5596ab0d3116bb;hp=d222f9ae5d5e16ba05a64241e5ab1b1a0a1896b3;hb=c502ca0c6ed02387134193d215f6af0b3e29afe1;hpb=3c8cee9e032f175c987c538a49e6dc0440789e02

diff --git a/src/rrd_graph.h b/src/rrd_graph.h
index d222f9a..8e28f63 100644
--- a/src/rrd_graph.h
+++ b/src/rrd_graph.h
@@ -1,81 +1,145 @@
+#ifndef _RRD_GRAPH_H
+#define _RRD_GRAPH_H
+
+#define y0 cairo_y0
+#define y1 cairo_y1
+#define index cairo_index
+
+/* this may configure __EXTENSIONS__ without which pango will fail to compile
+   so load this early */
+#include "../rrd_config.h"
+
+#include <cairo.h>
+#include <cairo-pdf.h>
+#include <cairo-svg.h>
+#include <cairo-ps.h>
+
+#include <pango/pangocairo.h>
+
+
 #include "rrd_tool.h"
 #include "rrd_rpncalc.h"
-#include "rrd_gfx.h"
 
-#define MAX_VNAME_LEN 29
-#define DEF_NAM_FMT "%29[_A-Za-z0-9]"
+#ifdef WIN32
+#  include <windows.h>
+#  define MAXPATH MAX_PATH
+#endif
+
+#define ALTYGRID  	 0x01   /* use alternative y grid algorithm */
+#define ALTAUTOSCALE	 0x02   /* use alternative algorithm to find lower and upper bounds */
+#define ALTAUTOSCALE_MIN 0x04   /* use alternative algorithm to find lower bounds */
+#define ALTAUTOSCALE_MAX 0x08   /* use alternative algorithm to find upper bounds */
+#define NOLEGEND	 0x10   /* use no legend */
+#define NOMINOR          0x20   /* Turn off minor gridlines */
+#define ONLY_GRAPH       0x40   /* use only graph */
+#define FORCE_RULES_LEGEND 0x80 /* force printing of HRULE and VRULE legend */
 
-#define ALTYGRID	0x01	/* use alternative y grid algorithm */
-#define ALTAUTOSCALE	0x02	/* use alternative algorithm to find lower and upper bounds */
-#define ALTAUTOSCALE_MAX 0x04	/* use alternative algorithm to find upper bounds */
-#define NOLEGEND	0x08	/* use no legend */
+#define FORCE_UNITS 0x100   /* mask for all FORCE_UNITS_* flags */
+#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) */
 
+#define FULL_SIZE_MODE     0x200    /* -width and -height indicate the total size of the image */
+#define NO_RRDTOOL_TAG 0x400  /* disable the rrdtool tag */
 
-enum tmt_en {TMT_SECOND=0,TMT_MINUTE,TMT_HOUR,TMT_DAY,
-	     TMT_WEEK,TMT_MONTH,TMT_YEAR};
+enum tmt_en { TMT_SECOND = 0, TMT_MINUTE, TMT_HOUR, TMT_DAY,
+    TMT_WEEK, TMT_MONTH, TMT_YEAR
+};
 
-enum grc_en {GRC_CANVAS=0,GRC_BACK,GRC_SHADEA,GRC_SHADEB,
-	     GRC_GRID,GRC_MGRID,GRC_FONT,GRC_FRAME,GRC_ARROW,__GRC_END__};
+enum grc_en { GRC_CANVAS = 0, GRC_BACK, GRC_SHADEA, GRC_SHADEB,
+    GRC_GRID, GRC_MGRID, GRC_FONT, GRC_ARROW, GRC_AXIS, GRC_FRAME, __GRC_END__
+};
 
 #define MGRIDWIDTH 0.6
 #define GRIDWIDTH  0.4
 
-enum gf_en {GF_PRINT=0,GF_GPRINT,GF_COMMENT,GF_HRULE,GF_VRULE,GF_LINE,
-	    GF_AREA,GF_STACK,GF_TICK,
-	    GF_DEF, GF_CDEF, GF_VDEF,
-	    GF_PART};
+enum gf_en { GF_PRINT = 0, GF_GPRINT, GF_COMMENT, GF_HRULE, GF_VRULE, GF_LINE,
+    GF_AREA, GF_STACK, GF_TICK, GF_TEXTALIGN,
+    GF_DEF, GF_CDEF, GF_VDEF, GF_SHIFT,
+    GF_XPORT
+};
 
-enum if_en {IF_PNG=0};
+enum txa_en { TXA_LEFT = 0, TXA_RIGHT, TXA_CENTER, TXA_JUSTIFIED };
 
 enum vdef_op_en {
-		 VDEF_MAXIMUM	/* like the MAX in (G)PRINT */
-		,VDEF_MINIMUM	/* like the MIN in (G)PRINT */
-		,VDEF_AVERAGE	/* like the AVERAGE in (G)PRINT */
-		,VDEF_PERCENT	/* Nth percentile */
-		,VDEF_TOTAL	/* average multiplied by time */
-		,VDEF_FIRST	/* first non-unknown value and time */
-		,VDEF_LAST	/* last  non-unknown value and time */
-		};
-enum text_prop_en { TEXT_PROP_DEFAULT=0,   /* default settings */
-	            TEXT_PROP_TITLE,       /* properties for the title */
-		    TEXT_PROP_AXIS,        /* for the numbers next to the axis */
-		    TEXT_PROP_UNIT,        /* for the vertical unit description */
-		    TEXT_PROP_LEGEND,      /* fot the legend below the graph */
-		    TEXT_PROP_LAST };
+    VDEF_MAXIMUM = 0    /* like the MAX in (G)PRINT */
+        , VDEF_MINIMUM  /* like the MIN in (G)PRINT */
+        , VDEF_AVERAGE  /* like the AVERAGE in (G)PRINT */
+        , VDEF_STDEV    /* the standard deviation */
+        , VDEF_PERCENT  /* Nth percentile */
+        , VDEF_TOTAL    /* average multiplied by time */
+        , VDEF_FIRST    /* first non-unknown value and time */
+        , VDEF_LAST     /* last  non-unknown value and time */
+        , VDEF_LSLSLOPE /* least squares line slope */
+        , VDEF_LSLINT   /* least squares line y_intercept */
+        , VDEF_LSLCORREL    /* least squares line correlation coefficient */
+        , VDEF_PERCENTNAN  /* Nth percentile ignoring NAN*/
+};
+enum text_prop_en { 
+    TEXT_PROP_DEFAULT = 0,  /* default settings */
+    TEXT_PROP_TITLE,    /* properties for the title */
+    TEXT_PROP_AXIS,     /* for the numbers next to the axis */
+    TEXT_PROP_UNIT,     /* for the vertical unit description */
+    TEXT_PROP_LEGEND,   /* for the legend below the graph */
+    TEXT_PROP_WATERMARK, /* for the little text to the side of the graph */
+    TEXT_PROP_LAST
+};
+
+enum legend_pos{ NORTH = 0, WEST, SOUTH, EAST };
+enum legend_direction { TOP_DOWN = 0, BOTTOM_UP };
+
+enum gfx_if_en { IF_PNG = 0, IF_SVG, IF_EPS, IF_PDF };
+enum gfx_en { GFX_LINE = 0, GFX_AREA, GFX_TEXT };
+enum gfx_h_align_en { GFX_H_NULL = 0, GFX_H_LEFT, GFX_H_RIGHT, GFX_H_CENTER };
+enum gfx_v_align_en { GFX_V_NULL = 0, GFX_V_TOP, GFX_V_BOTTOM, GFX_V_CENTER };
+
+/* cairo color components */
+typedef struct gfx_color_t {
+    double    red;
+    double    green;
+    double    blue;
+    double    alpha;
+} gfx_color_t;
+
 
 typedef struct text_prop_t {
-  double       size;
-  char *       font;
+    double    size;
+    char      font[1024];
+    PangoFontDescription *font_desc;
 } text_prop_t;
 
 
 typedef struct vdef_t {
-    enum vdef_op_en	op;
-    double		param;	/* parameter for function, if applicable */
-    double		val;	/* resulting value */
-    time_t		when;	/* timestamp, if applicable */
+    enum vdef_op_en op;
+    double    param;    /* parameter for function, if applicable */
+    double    val;      /* resulting value */
+    time_t    when;     /* timestamp, if applicable */
 } vdef_t;
 
 typedef struct xlab_t {
-    long         minsec;       /* minimum sec per pix */
-    enum tmt_en  gridtm;       /* grid interval in what ?*/
-    long         gridst;       /* how many whats per grid*/
-    enum tmt_en  mgridtm;      /* label interval in what ?*/
-    long         mgridst;      /* how many whats per label*/
-    enum tmt_en  labtm;        /* label interval in what ?*/
-    long         labst;        /* how many whats per label*/
-    long         precis;       /* label precision -> label placement*/
-    char         *stst;        /* strftime string*/
+    long      minsec;   /* minimum sec per pix */
+    long      length;   /* number of secs on the image */
+    enum tmt_en gridtm; /* grid interval in what ? */
+    long      gridst;   /* how many whats per grid */
+    enum tmt_en mgridtm;    /* label interval in what ? */
+    long      mgridst;  /* how many whats per label */
+    enum tmt_en labtm;  /* label interval in what ? */
+    long      labst;    /* how many whats per label */
+    long      precis;   /* label precision -> label placement */
+    char     *stst;     /* strftime string */
 } xlab_t;
 
+typedef struct ygrid_scale_t {  /* y axis grid scaling info */
+    double    gridstep;
+    int       labfact;
+    char      labfmt[64];
+} ygrid_scale_t;
+
 /* sensible y label intervals ...*/
 
 typedef struct ylab_t {
-    double   grid;    /* grid spacing */
-    int      lfac[4]; /* associated label spacing*/
+    double    grid;     /* grid spacing */
+    int       lfac[4];  /* associated label spacing */
 } ylab_t;
 
-
 /* this structure describes the elements which can make up a graph.
    because they are quite diverse, not all elements will use all the
    possible parts of the structure. */
@@ -85,127 +149,339 @@ typedef struct ylab_t {
 #define FMT_LEG_LEN 2000
 #endif
 
-typedef  struct graph_desc_t {
-    enum gf_en     gf;         /* graphing function */
-    char           vname[MAX_VNAME_LEN+1];  /* name of the variable */
-    long           vidx;       /* gdes reference */
-    char           rrd[255];   /* name of the rrd_file containing data */
-    char           ds_nam[DS_NAM_SIZE]; /* data source name */
-    long           ds;         /* data source number */
-    enum cf_en     cf;         /* consolidation function */
-    gfx_color_t    col;        /* graph color */
-    char  format[FMT_LEG_LEN+5]; /* format for PRINT AND GPRINT */
-    char  legend[FMT_LEG_LEN+5]; /* legend*/
-    double         leg_x,leg_y;  /* location of legend */   
-    double         yrule;      /* value for y rule line and for VDEF */
-    time_t         xrule;      /* time for x rule line and for VDEF */
-    vdef_t         vf;         /* instruction for VDEF function */
-    rpnp_t         *rpnp;     /* instructions for CDEF function */
+typedef struct graph_desc_t {
+    enum gf_en gf;      /* graphing function */
+    int       stack;    /* boolean */
+    int       debug;    /* boolean */
+    char      vname[MAX_VNAME_LEN + 1]; /* name of the variable */
+    long      vidx;     /* gdes reference */
+    char      rrd[1024];    /* name of the rrd_file containing data */
+    char      ds_nam[DS_NAM_SIZE];  /* data source name */
+    long      ds;       /* data source number */
+    enum cf_en cf;      /* consolidation function */
+    enum cf_en cf_reduce;   /* consolidation function for reduce_data() */
+    struct gfx_color_t col; /* graph color */
+    char      format[FMT_LEG_LEN + 5];  /* format for PRINT AND GPRINT */
+    char      legend[FMT_LEG_LEN + 5];  /* legend */
+    int       strftm;   /* should the VDEF legend be formated with strftime */
+    double    leg_x, leg_y; /* location of legend */
+    double    yrule;    /* value for y rule line and for VDEF */
+    time_t    xrule;    /* time for x rule line and for VDEF */
+    vdef_t    vf;       /* instruction for VDEF function */
+    rpnp_t   *rpnp;     /* instructions for CDEF function */
+
+    /* SHIFT implementation */
+    int       shidx;    /* gdes reference for offset (-1 --> constant) */
+    time_t    shval;    /* offset if shidx is -1 */
+    time_t    shift;    /* current shift applied */
 
     /* description of data fetched for the graph element */
-    time_t         start,end; /* timestaps for first and last data element */
-    unsigned long  step;      /* time between samples */
-    unsigned long  ds_cnt; /* how many data sources are there in the fetch */
-    long           data_first; /* first pointer to this data */
-    char           **ds_namv; /* name of datasources  in the fetch. */
-    rrd_value_t    *data; /* the raw data drawn from the rrd */
-    rrd_value_t    *p_data; /* processed data, xsize elments */
-    double         linewidth;  /* linewideth */
+    time_t    start, end;   /* timestaps for first and last data element */
+    time_t    start_orig, end_orig; /* timestaps for first and last data element */
+    unsigned long step; /* time between samples */
+    unsigned long step_orig;    /* time between samples */
+    unsigned long ds_cnt;   /* how many data sources are there in the fetch */
+    long      data_first;   /* first pointer to this data */
+    char    **ds_namv;  /* name of datasources  in the fetch. */
+    rrd_value_t *data;  /* the raw data drawn from the rrd */
+    rrd_value_t *p_data;    /* processed data, xsize elments */
+    double    linewidth;    /* linewideth */
+
+    /* dashed line stuff */
+    int       dash;     /* boolean, draw dashed line? */
+    double   *p_dashes; /* pointer do dash array which keeps the lengths of dashes */
+    int       ndash;    /* number of dash segments */
+    double    offset;   /* dash offset along the line */
+
+    enum txa_en txtalign;   /* change default alignment strategy for text */
 } graph_desc_t;
 
 typedef struct image_desc_t {
 
     /* configuration of graph */
 
-    char           graphfile[MAXPATH]; /* filename for graphic */
-    long           xsize,ysize,piesize;    /* graph area size in pixels */
-    double         zoom;           /* zoom for graph */
-    gfx_color_t    graph_col[__GRC_END__]; /* real colors for the graph */   
-    text_prop_t    text_prop[TEXT_PROP_LAST]; /* text properties */
-    char           ylegend[200];   /* legend along the yaxis */
-    char           title[200];     /* title for graph */
-    int            draw_x_grid;      /* no x-grid at all */
-    int            draw_y_grid;      /* no x-grid at all */
-    xlab_t         xlab_user;      /* user defined labeling for xaxis */
-    char           xlab_form[200]; /* format for the label on the xaxis */
-
-    double         ygridstep;      /* user defined step for y grid */
-    int            ylabfact;       /* every how many y grid shall a label be written ? */
-    double         tabwidth;       /* tabwdith */
-    time_t         start,end;      /* what time does the graph cover */
-    unsigned long  step;           /* any preference for the default step ? */
-    rrd_value_t    minval,maxval;  /* extreme values in the data */
-    int            rigid;          /* do not expand range even with 
-				      values outside */
-    char*          imginfo;        /* construct an <IMG ... tag and return 
-				      as first retval */
-    int            lazy;           /* only update the gif if there is reasonable
-				      probablility that the existing one is out of date */
-    int            logarithmic;    /* scale the yaxis logarithmic */
-    enum if_en     imgformat;      /* image format */
-    
+    char      graphfile[MAXPATH];   /* filename for graphic */
+    long      xsize, ysize; /* graph area size in pixels */
+    struct gfx_color_t graph_col[__GRC_END__];  /* real colors for the graph */
+    text_prop_t text_prop[TEXT_PROP_LAST];  /* text properties */
+    char      ylegend[210]; /* legend along the yaxis */
+    char      title[210];   /* title for graph */
+    char      watermark[110];   /* watermark for graph */
+    int       draw_x_grid;  /* no x-grid at all */
+    int       draw_y_grid;  /* no y-grid at all */
+    unsigned int draw_3d_border; /* size of border in pixels, 0 for off */
+    unsigned int dynamic_labels; /* pick the label shape according to the line drawn */
+    double    grid_dash_on, grid_dash_off;
+    xlab_t    xlab_user;    /* user defined labeling for xaxis */
+    char      xlab_form[210];   /* format for the label on the xaxis */
+    double    second_axis_scale; /* relative to the first axis (0 to disable) */
+    double    second_axis_shift; /* how much is it shifted vs the first axis */
+    char      second_axis_legend[210]; /* label to put on the seond axis */
+    char      second_axis_format[210]; /* format for the numbers on the scond axis */    
+
+    double    ygridstep;    /* user defined step for y grid */
+    int       ylabfact; /* every how many y grid shall a label be written ? */
+    double    tabwidth; /* tabwdith */
+    time_t    start, end;   /* what time does the graph cover */
+    unsigned long step; /* any preference for the default step ? */
+    rrd_value_t minval, maxval; /* extreme values in the data */
+    int       rigid;    /* do not expand range even with 
+                           values outside */
+    ygrid_scale_t ygrid_scale;  /* calculated y axis grid info */
+    int       gridfit;  /* adjust y-axis range etc so all
+                           grindlines falls in integer pixel values */
+    char     *imginfo;  /* construct an <IMG ... tag and return 
+                           as first retval */
+    enum gfx_if_en imgformat;   /* image format */
+    char     *daemon_addr;  /* rrdcached connection string */
+    int       lazy;     /* only update the image if there is
+                           reasonable probablility that the
+                           existing one is out of date */
+    int       slopemode;    /* connect the dots of the curve directly, not using a stair */
+    enum legend_pos legendposition; /* the position of the legend: north, west, south or east */
+    enum legend_direction legenddirection; /* The direction of the legend topdown or bottomup */
+    int       logarithmic;  /* scale the yaxis logarithmic */
+    double    force_scale_min;  /* Force a scale--min */
+    double    force_scale_max;  /* Force a scale--max */
+
     /* status information */
-    	    
-    long           xorigin,yorigin;/* where is (0,0) of the graph */
-    long           pie_x,pie_y;    /* where is the centerpoint */
-    long           xgif,ygif;      /* total size of the gif */
-    int            interlaced;     /* will the graph be interlaced? */
-    double         magfact;        /* numerical magnitude*/
-    long         base;            /* 1000 or 1024 depending on what we graph */
-    char           symbol;         /* magnitude symbol for y-axis */
-    int            unitsexponent;    /* 10*exponent for units on y-asis */
-    int            extra_flags;    /* flags for boolean options */
-    /* data elements */
+    int       with_markup;
+    long      xorigin, yorigin; /* where is (0,0) of the graph */
+    long      xOriginTitle, yOriginTitle; /* where is the origin of the title */
+    long      xOriginLegendY, yOriginLegendY; /* where is the origin of the y legend */
+    long      xOriginLegendY2, yOriginLegendY2; /* where is the origin of the second y legend */
+    long      xOriginLegend, yOriginLegend; /* where is the origin of the legend */
+    long      ximg, yimg;   /* total size of the image */
+    long      legendwidth, legendheight; /* the calculated height and width of the legend */
+    size_t    rendered_image_size;
+    double    zoom;
+    double    magfact;  /* numerical magnitude */
+    long      base;     /* 1000 or 1024 depending on what we graph */
+    char      symbol;   /* magnitude symbol for y-axis */
+    float     viewfactor;   /* how should the numbers on the y-axis be scaled for viewing ? */
+    int       unitsexponent;    /* 10*exponent for units on y-asis */
+    int       unitslength;  /* width of the yaxis labels */
+    int       forceleftspace;   /* do not kill the space to the left of the y-axis if there is no grid */
 
-    long  prt_c;                  /* number of print elements */
-    long  gdes_c;                  /* number of graphics elements */
-    graph_desc_t   *gdes;          /* points to an array of graph elements */
+    int       extra_flags;  /* flags for boolean options */
+    /* data elements */
 
+    unsigned char *rendered_image;
+    long      prt_c;    /* number of print elements */
+    long      gdes_c;   /* number of graphics elements */
+    graph_desc_t *gdes; /* points to an array of graph elements */
+    cairo_surface_t *surface;   /* graphics library */
+    cairo_t  *cr;       /* drawin context */
+    cairo_font_options_t *font_options; /* cairo font options */
+    cairo_antialias_t graph_antialias;  /* antialiasing for the graph */
+    PangoLayout *layout; /* the pango layout we use for writing fonts */
+    rrd_info_t *grinfo; /* root pointer to extra graph info */
+    rrd_info_t *grinfo_current; /* pointing to current entry */
 } image_desc_t;
 
 /* Prototypes */
-int xtr(image_desc_t *,time_t);
-int ytr(image_desc_t *, double);
-enum gf_en gf_conv(char *);
-enum if_en if_conv(char *);
-enum tmt_en tmt_conv(char *);
-enum grc_en grc_conv(char *);
-enum grc_en text_prop_conv(char *);
-int im_free(image_desc_t *);
-void auto_scale( image_desc_t *,  double *, char **, double *);
-void si_unit( image_desc_t *);
-void expand_range(image_desc_t *);
-void reduce_data( enum cf_en,  unsigned long,  time_t *, time_t *,  unsigned long *,  unsigned long *,  rrd_value_t **);
-int data_fetch( image_desc_t *);
-long find_var(image_desc_t *, char *);
-long find_var_wrapper(void *arg1, char *key);
-long lcd(long *);
-int data_calc( image_desc_t *);
-int data_proc( image_desc_t *);
-time_t find_first_time( time_t,  enum tmt_en,  long);
-time_t find_next_time( time_t,  enum tmt_en,  long);
-int print_calc(image_desc_t *, char ***);
-int leg_place(image_desc_t *);
-int horizontal_grid(gfx_canvas_t *,image_desc_t *);
-int horizontal_log_grid(gfx_canvas_t *, image_desc_t *);
-void vertical_grid(gfx_canvas_t *, image_desc_t *);
-void axis_paint( image_desc_t *, gfx_canvas_t *);
-void grid_paint( image_desc_t *, gfx_canvas_t *);
-int lazy_check(image_desc_t *);
-int graph_paint(image_desc_t *, char ***);
-void pie_part(gfx_canvas_t *, gfx_color_t, double, double, double, double, double);
-int gdes_alloc(image_desc_t *);
-int scan_for_col(char *, int, char *);
-int rrd_graph(int, char **, char ***, int *, int *);
-void rrd_graph_init(image_desc_t *);
-void rrd_graph_options(int, char **, image_desc_t *);
-void rrd_graph_script(int, char **, image_desc_t *);
-int rrd_graph_check_vname(image_desc_t *, char *, char *);
-int rrd_graph_check_CF(image_desc_t *, char *, char *);
-int rrd_graph_color(image_desc_t *, char *, char *, int);
-int rrd_graph_legend(graph_desc_t *, char *);
-int bad_format(char *);
-int vdef_parse(struct graph_desc_t *,char *);
-int vdef_calc(image_desc_t *, int);
-int vdef_percent_compar(const void *,const void *);
-int graph_size_location(image_desc_t *, int, int);
+int       xtr(
+    image_desc_t *,
+    time_t);
+double    ytr(
+    image_desc_t *,
+    double);
+enum gf_en gf_conv(
+    char *);
+enum gfx_if_en if_conv(
+    char *);
+enum tmt_en tmt_conv(
+    char *);
+enum grc_en grc_conv(
+    char *);
+enum text_prop_en text_prop_conv(
+    char *);
+int       im_free(
+    image_desc_t *);
+void      auto_scale(
+    image_desc_t *,
+    double *,
+    char **,
+    double *);
+void      si_unit(
+    image_desc_t *);
+void      expand_range(
+    image_desc_t *);
+void      apply_gridfit(
+    image_desc_t *);
+void      reduce_data(
+    enum cf_en,
+    unsigned long,
+    time_t *,
+    time_t *,
+    unsigned long *,
+    unsigned long *,
+    rrd_value_t **);
+int       data_fetch(
+    image_desc_t *);
+long      find_var(
+    image_desc_t *,
+    char *);
+long      find_var_wrapper(
+    void *arg1,
+    char *key);
+long      lcd(
+    long *);
+int       data_calc(
+    image_desc_t *);
+int       data_proc(
+    image_desc_t *);
+time_t    find_first_time(
+    time_t,
+    enum tmt_en,
+    long);
+time_t    find_next_time(
+    time_t,
+    enum tmt_en,
+    long);
+int       print_calc(
+    image_desc_t *);
+int       leg_place(
+    image_desc_t *,
+    int);
+int       calc_horizontal_grid(
+    image_desc_t *);
+int       draw_horizontal_grid(
+    image_desc_t *);
+int       horizontal_log_grid(
+    image_desc_t *);
+void      vertical_grid(
+    image_desc_t *);
+void      axis_paint(
+    image_desc_t *);
+void      grid_paint(
+    image_desc_t *);
+int       lazy_check(
+    image_desc_t *);
+int       graph_paint(
+    image_desc_t *);
+
+int       gdes_alloc(
+    image_desc_t *);
+int       scan_for_col(
+    const char *const,
+    int,
+    char *const);
+void      rrd_graph_init(
+    image_desc_t *);
+
+void      rrd_graph_options(
+    int,
+    char **,
+    image_desc_t *);
+void      rrd_graph_script(
+    int,
+    char **,
+    image_desc_t *,
+    int);
+int       rrd_graph_color(
+    image_desc_t *,
+    char *,
+    char *,
+    int);
+int       bad_format(
+    char *);
+int       vdef_parse(
+    struct graph_desc_t *,
+    const char *const);
+int       vdef_calc(
+    image_desc_t *,
+    int);
+int       vdef_percent_compar(
+    const void *,
+    const void *);
+int       graph_size_location(
+    image_desc_t *,
+    int);
+
+
+/* create a new line */
+void      gfx_line(
+    image_desc_t *im,
+    double X0,
+    double Y0,
+    double X1,
+    double Y1,
+    double width,
+    gfx_color_t color);
+
+void      gfx_dashed_line(
+    image_desc_t *im,
+    double X0,
+    double Y0,
+    double X1,
+    double Y1,
+    double width,
+    gfx_color_t color,
+    double dash_on,
+    double dash_off);
+
+/* create a new area */
+void      gfx_new_area(
+    image_desc_t *im,
+    double X0,
+    double Y0,
+    double X1,
+    double Y1,
+    double X2,
+    double Y2,
+    gfx_color_t color);
+
+/* add a point to a line or to an area */
+void      gfx_add_point(
+    image_desc_t *im,
+    double x,
+    double y);
+
+/* close current path so it ends at the same point as it started */
+void      gfx_close_path(
+    image_desc_t *im);
+
+
+/* create a text node */
+void      gfx_text(
+    image_desc_t *im,
+    double x,
+    double y,
+    gfx_color_t color,
+    PangoFontDescription *font_desc,
+    double tabwidth,
+    double angle,
+    enum gfx_h_align_en h_align,
+    enum gfx_v_align_en v_align,
+    const char *text);
+
+/* measure width of a text string */
+double    gfx_get_text_width(
+    image_desc_t *im,
+    double start,
+    PangoFontDescription *font_desc,
+    double tabwidth,
+    char *text);
+
+
+/* convert color */
+gfx_color_t gfx_hex_to_col(
+    long unsigned int);
+
+void      gfx_line_fit(
+    image_desc_t *im,
+    double *x,
+    double *y);
+
+void      gfx_area_fit(
+    image_desc_t *im,
+    double *x,
+    double *y);
+
+#endif
+
+void      grinfo_push(
+    image_desc_t *im,
+    char *key,
+    rrd_info_type_t type,    rrd_infoval_t value);