* we are now creating true RGBA pngs
[rrdtool.git] / src / rrd_graph.c
index bfce36f..a0748ad 100644 (file)
@@ -1,38 +1,44 @@
 /****************************************************************************
- * RRDtool 1.1.x  Copyright Tobias Oetiker, 1997 - 2002
+ * RRDtool 1.2rc6  Copyright by Tobi Oetiker, 1997-2005
  ****************************************************************************
- * rrd__graph.c  make creates ne rrds
+ * rrd__graph.c  produce graphs from data in rrdfiles
  ****************************************************************************/
 
-#if 0
-#include "rrd_tool.h"
-#endif
 
 #include <sys/stat.h>
-#ifdef WIN32
+
+#include "rrd_tool.h"
+
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
 #include <io.h>
 #include <fcntl.h>
-#define RRD_DEFAULT_FONT "c:/winnt/fonts/COUR.TTF"
+#endif
+
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+#ifdef HAVE_LOCALE_H
+#include <locale.h>
 #endif
 
 #include "rrd_graph.h"
-#include "rrd_graph_helper.h"
 
 /* some constant definitions */
 
 
+
 #ifndef RRD_DEFAULT_FONT
-#define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/openoffice/ariosor.ttf" 
-/* #define RRD_DEFAULT_FONT "/usr/share/fonts/truetype/Arial.ttf" */
+/* there is special code later to pick Cour.ttf when running on windows */
+#define RRD_DEFAULT_FONT "VeraMono.ttf"
 #endif
 
-
 text_prop_t text_prop[] = {   
-     { 10.0, RRD_DEFAULT_FONT }, /* default */
-     { 12.0, RRD_DEFAULT_FONT }, /* title */
-     { 8.0,  RRD_DEFAULT_FONT },  /* axis */
-     { 10.0, RRD_DEFAULT_FONT },  /* unit */
-     { 10.0, RRD_DEFAULT_FONT }  /* legend */
+     { 9.0, RRD_DEFAULT_FONT }, /* default */
+     { 11.0, RRD_DEFAULT_FONT }, /* title */
+     { 8.0,  RRD_DEFAULT_FONT }, /* axis */
+     { 9.0, RRD_DEFAULT_FONT }, /* unit */
+     { 9.0, RRD_DEFAULT_FONT }  /* legend */
 };
 
 xlab_t xlab[] = {
@@ -90,11 +96,11 @@ gfx_color_t graph_col[] =   /* default colors */
      0xF0F0F0FF,   /* background */
      0xD0D0D0FF,   /* shade A    */
      0xA0A0A0FF,   /* shade B    */
-     0x909090FF,   /* grid       */
-     0xE05050FF,   /* major grid */
+     0x90909080,   /* grid       */
+     0xE0505080,   /* major grid */
      0x000000FF,   /* font       */ 
-     0x000000FF,   /* frame      */
-     0xFF0000FF  /* arrow      */
+     0x802020FF,   /* arrow      */
+     0x202020FF    /* axis       */
 };
 
 
@@ -120,7 +126,7 @@ xtr(image_desc_t *im,time_t mytime){
 }
 
 /* translate data values into y coordinates */
-int
+double
 ytr(image_desc_t *im, double value){
     static double pixie;
     double yval;
@@ -131,26 +137,25 @@ ytr(image_desc_t *im, double value){
        pixie = (double) im->ysize / (log10(im->maxval) - log10(im->minval));
       yval = im->yorigin;
     } else if(!im->logarithmic) {
-      yval = im->yorigin - pixie * (value - im->minval) + 0.5;
+      yval = im->yorigin - pixie * (value - im->minval);
     } else {
       if (value < im->minval) {
        yval = im->yorigin;
       } else {
-       yval = im->yorigin - pixie * (log10(value) - log10(im->minval)) + 0.5;
+       yval = im->yorigin - pixie * (log10(value) - log10(im->minval));
       }
     }
     /* make sure we don't return anything too unreasonable. GD lib can
        get terribly slow when drawing lines outside its scope. This is 
        especially problematic in connection with the rigid option */
     if (! im->rigid) {
-      return (int)yval;
-    } else if ((int)yval > im->yorigin) {
-      return im->yorigin+2;
-    } else if ((int) yval < im->yorigin - im->ysize){
-      return im->yorigin - im->ysize - 2;
-    } else {
-      return (int)yval;
+      /* keep yval as-is */
+    } else if (yval > im->yorigin) {
+      yval = im->yorigin+2;
+    } else if (yval < im->yorigin - im->ysize){
+      yval = im->yorigin - im->ysize - 2;
     } 
+    return yval;
 }
 
 
@@ -175,7 +180,11 @@ enum gf_en gf_conv(char *string){
     conv_if(DEF,GF_DEF)
     conv_if(CDEF,GF_CDEF)
     conv_if(VDEF,GF_VDEF)
+#ifdef WITH_PIECHART
     conv_if(PART,GF_PART)
+#endif
+    conv_if(XPORT,GF_XPORT)
+    conv_if(SHIFT,GF_SHIFT)
     
     return (-1);
 }
@@ -184,6 +193,8 @@ enum gfx_if_en if_conv(char *string){
     
     conv_if(PNG,IF_PNG)
     conv_if(SVG,IF_SVG)
+    conv_if(EPS,IF_EPS)
+    conv_if(PDF,IF_PDF)
 
     return (-1);
 }
@@ -209,8 +220,8 @@ enum grc_en grc_conv(char *string){
     conv_if(GRID,GRC_GRID)
     conv_if(MGRID,GRC_MGRID)
     conv_if(FONT,GRC_FONT)
-    conv_if(FRAME,GRC_FRAME)
     conv_if(ARROW,GRC_ARROW)
+    conv_if(AXIS,GRC_AXIS)
 
     return -1; 
 }
@@ -228,14 +239,13 @@ enum text_prop_en text_prop_conv(char *string){
 
 #undef conv_if
 
-
-
 int
 im_free(image_desc_t *im)
 {
-    long i,ii;
+    unsigned long      i,ii;
+
     if (im == NULL) return 0;
-    for(i=0;i<im->gdes_c;i++){
+    for(i=0;i<(unsigned)im->gdes_c;i++){
       if (im->gdes[i].data_first){
        /* careful here, because a single pointer can occur several times */
          free (im->gdes[i].data);
@@ -428,7 +438,73 @@ expand_range(image_desc_t *im)
 #endif
 }
 
-    
+void
+apply_gridfit(image_desc_t *im)
+{
+  if (isnan(im->minval) || isnan(im->maxval))
+    return;
+  ytr(im,DNAN);
+  if (im->logarithmic) {
+    double ya, yb, ypix, ypixfrac;
+    double log10_range = log10(im->maxval) - log10(im->minval);
+    ya = pow((double)10, floor(log10(im->minval)));
+    while (ya < im->minval)
+      ya *= 10;
+    if (ya > im->maxval)
+      return; /* don't have y=10^x gridline */
+    yb = ya * 10;
+    if (yb <= im->maxval) {
+      /* we have at least 2 y=10^x gridlines.
+        Make sure distance between them in pixels
+        are an integer by expanding im->maxval */
+      double y_pixel_delta = ytr(im, ya) - ytr(im, yb);
+      double factor = y_pixel_delta / floor(y_pixel_delta);
+      double new_log10_range = factor * log10_range;
+      double new_ymax_log10 = log10(im->minval) + new_log10_range;
+      im->maxval = pow(10, new_ymax_log10);
+      ytr(im, DNAN); /* reset precalc */
+      log10_range = log10(im->maxval) - log10(im->minval);
+    }
+    /* make sure first y=10^x gridline is located on 
+       integer pixel position by moving scale slightly 
+       downwards (sub-pixel movement) */
+    ypix = ytr(im, ya) + im->ysize; /* add im->ysize so it always is positive */
+    ypixfrac = ypix - floor(ypix);
+    if (ypixfrac > 0 && ypixfrac < 1) {
+      double yfrac = ypixfrac / im->ysize;
+      im->minval = pow(10, log10(im->minval) - yfrac * log10_range);
+      im->maxval = pow(10, log10(im->maxval) - yfrac * log10_range);
+      ytr(im, DNAN); /* reset precalc */
+    }
+  } else {
+    /* Make sure we have an integer pixel distance between
+       each minor gridline */
+    double ypos1 = ytr(im, im->minval);
+    double ypos2 = ytr(im, im->minval + im->ygrid_scale.gridstep);
+    double y_pixel_delta = ypos1 - ypos2;
+    double factor = y_pixel_delta / floor(y_pixel_delta);
+    double new_range = factor * (im->maxval - im->minval);
+    double gridstep = im->ygrid_scale.gridstep;
+    double minor_y, minor_y_px, minor_y_px_frac;
+    im->maxval = im->minval + new_range;
+    ytr(im, DNAN); /* reset precalc */
+    /* make sure first minor gridline is on integer pixel y coord */
+    minor_y = gridstep * floor(im->minval / gridstep);
+    while (minor_y < im->minval)
+      minor_y += gridstep;
+    minor_y_px = ytr(im, minor_y) + im->ysize; /* ensure > 0 by adding ysize */
+    minor_y_px_frac = minor_y_px - floor(minor_y_px);
+    if (minor_y_px_frac > 0 && minor_y_px_frac < 1) {
+      double yfrac = minor_y_px_frac / im->ysize;
+      double range = im->maxval - im->minval;
+      im->minval = im->minval - yfrac * range;
+      im->maxval = im->maxval - yfrac * range;
+      ytr(im, DNAN); /* reset precalc */
+    }
+    calc_horizontal_grid(im); /* recalc with changed im->maxval */
+  }
+}
+
 /* reduce data reimplementation by Alex */
 
 void
@@ -522,7 +598,7 @@ printf("row_cnt after:   %lu\n",row_cnt);
     ** into one interval for the destination.
     */
 
-    for (dst_row=0;row_cnt>=reduce_factor;dst_row++) {
+    for (dst_row=0;(long int)row_cnt>=reduce_factor;dst_row++) {
        for (col=0;col<(*ds_cnt);col++) {
            rrd_value_t newval=DNAN;
            unsigned long validval=0;
@@ -600,25 +676,31 @@ for (col=0;col<row_cnt;col++) {
    relevant rrds ... */
 
 int
-data_fetch( image_desc_t *im )
+data_fetch(image_desc_t *im )
 {
-    int       i,ii;
-    int skip;
+    int i,ii;
+    int                skip;
+
     /* pull the data from the log files ... */
-    for (i=0;i<im->gdes_c;i++){
+    for (i=0;i< (int)im->gdes_c;i++){
        /* only GF_DEF elements fetch data */
        if (im->gdes[i].gf != GF_DEF) 
            continue;
 
        skip=0;
        /* do we have it already ?*/
-       for (ii=0;ii<i;ii++){
+       for (ii=0;ii<i;ii++) {
            if (im->gdes[ii].gf != GF_DEF) 
                continue;
-           if((strcmp(im->gdes[i].rrd,im->gdes[ii].rrd) == 0)
-               && (im->gdes[i].cf == im->gdes[ii].cf)){
-               /* OK the data it is here already ... 
-                * we just copy the header portion */
+           if ((strcmp(im->gdes[i].rrd, im->gdes[ii].rrd) == 0)
+                       && (im->gdes[i].cf    == im->gdes[ii].cf)
+                       && (im->gdes[i].cf_reduce == im->gdes[ii].cf_reduce)
+                       && (im->gdes[i].start == im->gdes[ii].start)
+                       && (im->gdes[i].end   == im->gdes[ii].end)
+                       && (im->gdes[i].step  == im->gdes[ii].step)) {
+               /* OK, the data is already there.
+               ** Just copy the header portion
+               */
                im->gdes[i].start = im->gdes[ii].start;
                im->gdes[i].end = im->gdes[ii].end;
                im->gdes[i].step = im->gdes[ii].step;
@@ -645,9 +727,10 @@ data_fetch( image_desc_t *im )
                return -1;
            }
            im->gdes[i].data_first = 1;     
+           im->gdes[i].step = im->step;
        
            if (ft_step < im->gdes[i].step) {
-               reduce_data(im->gdes[i].cf,
+               reduce_data(im->gdes[i].cf_reduce,
                            ft_step,
                            &im->gdes[i].start,
                            &im->gdes[i].end,
@@ -659,8 +742,8 @@ data_fetch( image_desc_t *im )
            }
        }
        
-        /* lets see if the required data source is realy there */
-       for(ii=0;ii<im->gdes[i].ds_cnt;ii++){
+        /* lets see if the required data source is really there */
+       for(ii=0;ii<(int)im->gdes[i].ds_cnt;ii++){
            if(strcmp(im->gdes[i].ds_namv[ii],im->gdes[i].ds_nam) == 0){
                im->gdes[i].ds=ii; }
        }
@@ -736,6 +819,30 @@ data_calc( image_desc_t *im){
         * so CDEFs can use VDEFs and vice versa
         */
        switch (im->gdes[gdi].gf) {
+           case GF_XPORT:
+             break;
+           case GF_SHIFT: {
+               graph_desc_t    *vdp = &im->gdes[im->gdes[gdi].vidx];
+               
+               /* remove current shift */
+               vdp->start -= vdp->shift;
+               vdp->end -= vdp->shift;
+               
+               /* vdef */
+               if (im->gdes[gdi].shidx >= 0) 
+                       vdp->shift = im->gdes[im->gdes[gdi].shidx].vf.val;
+               /* constant */
+               else
+                       vdp->shift = im->gdes[gdi].shval;
+
+               /* normalize shift to multiple of consolidated step */
+               vdp->shift = (vdp->shift / (long)vdp->step) * (long)vdp->step;
+
+               /* apply shift */
+               vdp->start += vdp->shift;
+               vdp->end += vdp->shift;
+               break;
+           }
            case GF_VDEF:
                /* A VDEF has no DS.  This also signals other parts
                 * of rrdtool that this is a VDEF value, not a CDEF.
@@ -769,19 +876,22 @@ data_calc( image_desc_t *im){
                 *   resulting data source.
                 */
                for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
-                   if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE){
+               if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
+                  im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
                        long ptr = im->gdes[gdi].rpnp[rpi].ptr;
                        if (im->gdes[ptr].ds_cnt == 0) {
 #if 0
-printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
+                       printf("DEBUG: inside CDEF '%s' processing VDEF '%s'\n",
        im->gdes[gdi].vname,
        im->gdes[ptr].vname);
-printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
+                       printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
 #endif
                            im->gdes[gdi].rpnp[rpi].val = im->gdes[ptr].vf.val;
                            im->gdes[gdi].rpnp[rpi].op  = OP_NUMBER;
                        } else {
-                           if ((steparray = rrd_realloc(steparray, (++stepcnt+1)*sizeof(*steparray)))==NULL){
+                       if ((steparray =
+                                rrd_realloc(steparray,
+                                                        (++stepcnt+1)*sizeof(*steparray)))==NULL){
                                rrd_set_error("realloc steparray");
                                rpnstack_free(&rpnstack);
                                return -1;
@@ -820,14 +930,15 @@ printf("DEBUG: value from vdef is %f\n",im->gdes[ptr].vf.val);
 
                 /* move the data pointers to the correct period */
                 for(rpi=0;im->gdes[gdi].rpnp[rpi].op != OP_END;rpi++){
-                    if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE){
+               if(im->gdes[gdi].rpnp[rpi].op == OP_VARIABLE ||
+                  im->gdes[gdi].rpnp[rpi].op == OP_PREV_OTHER){
                         long ptr = im->gdes[gdi].rpnp[rpi].ptr;
-                        if(im->gdes[gdi].start > im->gdes[ptr].start) {
-                            im->gdes[gdi].rpnp[rpi].data += im->gdes[gdi].rpnp[rpi].ds_cnt;
-                        }
+                       long diff = im->gdes[gdi].start - im->gdes[ptr].start;
+
+                        if(diff > 0)
+                           im->gdes[gdi].rpnp[rpi].data += (diff / im->gdes[ptr].step) * im->gdes[ptr].ds_cnt;
                      }
                 }
-        
 
                if(steparray == NULL){
                    rrd_set_error("rpn expressions without DEF"
@@ -892,67 +1003,73 @@ data_proc( image_desc_t *im ){
     unsigned long gr_time;    
 
     /* memory for the processed data */
-    for(i=0;i<im->gdes_c;i++){
-      if((im->gdes[i].gf==GF_LINE) ||
-        (im->gdes[i].gf==GF_AREA) ||
-        (im->gdes[i].gf==GF_TICK) ||
-        (im->gdes[i].gf==GF_STACK)){
-       if((im->gdes[i].p_data = malloc((im->xsize +1)
+    for(i=0;i<im->gdes_c;i++) {
+       if((im->gdes[i].gf==GF_LINE) ||
+               (im->gdes[i].gf==GF_AREA) ||
+               (im->gdes[i].gf==GF_TICK) ||
+               (im->gdes[i].gf==GF_STACK)) {
+           if((im->gdes[i].p_data = malloc((im->xsize +1)
                                        * sizeof(rrd_value_t)))==NULL){
-         rrd_set_error("malloc data_proc");
-         return -1;
+               rrd_set_error("malloc data_proc");
+               return -1;
+           }
        }
-      }
     }
-    
-    for(i=0;i<im->xsize;i++){
+
+    for (i=0;i<im->xsize;i++) {        /* for each pixel */
        long vidx;
-       gr_time = im->start+pixstep*i; /* time of the 
-                                         current step */
+       gr_time = im->start+pixstep*i; /* time of the current step */
        paintval=0.0;
        
-       for(ii=0;ii<im->gdes_c;ii++){
-         double value;
-           switch(im->gdes[ii].gf){
-           case GF_LINE:
-           case GF_AREA:
+       for (ii=0;ii<im->gdes_c;ii++) {
+           double value;
+           switch (im->gdes[ii].gf) {
+               case GF_LINE:
+               case GF_AREA:
                case GF_TICK:
-               paintval = 0.0;
-           case GF_STACK:
-               vidx = im->gdes[ii].vidx;
-
-               value =
-                   im->gdes[vidx].data[
-                       ((unsigned long)floor(
-       (double)(gr_time-im->gdes[vidx].start) / im->gdes[vidx].step
-                                            )
-                        )      *im->gdes[vidx].ds_cnt
-                               +im->gdes[vidx].ds];
-
-               if (! isnan(value)) {
-                 paintval += value;
-                 im->gdes[ii].p_data[i] = paintval;
-                 /* GF_TICK: the data values are not relevant for min and max */
-                 if (finite(paintval) && im->gdes[ii].gf != GF_TICK ){
-                  if (isnan(minval) || paintval <  minval)
-                    minval = paintval;
-                  if (isnan(maxval) || paintval >  maxval)
-                    maxval = paintval;
-                 }
-               } else {
-                 im->gdes[ii].p_data[i] = DNAN;
-               }
-               break;
-           case GF_PRINT:
-           case GF_GPRINT:
-           case GF_COMMENT:
-           case GF_HRULE:
-           case GF_VRULE:
-           case GF_DEF:               
-           case GF_CDEF:
-           case GF_VDEF:
-           case GF_PART:
-               break;
+                   if (!im->gdes[ii].stack)
+                       paintval = 0.0;
+               case GF_STACK:
+                   value = im->gdes[ii].yrule;
+                   if (isnan(value) || (im->gdes[ii].gf == GF_TICK)) {
+                       /* The time of the data doesn't necessarily match
+                       ** the time of the graph. Beware.
+                       */
+                       vidx = im->gdes[ii].vidx;
+                       if (im->gdes[vidx].gf == GF_VDEF) {
+                           value = im->gdes[vidx].vf.val;
+                       } else if (((long int)gr_time >= (long int)im->gdes[vidx].start) &&
+                                  ((long int)gr_time <= (long int)im->gdes[vidx].end) ) {
+                           value = im->gdes[vidx].data[
+                               (unsigned long) floor(
+                                   (double)(gr_time - im->gdes[vidx].start)
+                                               / im->gdes[vidx].step)
+                               * im->gdes[vidx].ds_cnt
+                               + im->gdes[vidx].ds
+                           ];
+                       } else {
+                           value = DNAN;
+                       }
+                   };
+
+                   if (! isnan(value)) {
+                       paintval += value;
+                       im->gdes[ii].p_data[i] = paintval;
+                       /* GF_TICK: the data values are not
+                       ** relevant for min and max
+                       */
+                       if (finite(paintval) && im->gdes[ii].gf != GF_TICK ) {
+                           if (isnan(minval) || paintval <  minval)
+                               minval = paintval;
+                           if (isnan(maxval) || paintval >  maxval)
+                               maxval = paintval;
+                       }
+                   } else {
+                       im->gdes[ii].p_data[i] = DNAN;
+                   }
+                   break;
+               default:
+                   break;
            }
        }
     }
@@ -966,29 +1083,33 @@ data_proc( image_desc_t *im ){
     
     /* adjust min and max values */
     if (isnan(im->minval) 
-       || ((!im->logarithmic && !im->rigid) /* don't adjust low-end with log scale */
-           && im->minval > minval))
+       /* don't adjust low-end with log scale */
+       || ((!im->logarithmic && !im->rigid) && im->minval > minval)
+       )
        im->minval = minval;
     if (isnan(im->maxval) 
-       || (!im->rigid 
-           && im->maxval < maxval)){
+       || (!im->rigid && im->maxval < maxval)
+       {
        if (im->logarithmic)
            im->maxval = maxval * 1.1;
        else
            im->maxval = maxval;
     }
+    /* make sure min is smaller than max */
+    if (im->minval > im->maxval) {
+            im->minval = 0.99 * im->maxval;
+    }
+                      
     /* make sure min and max are not equal */
     if (im->minval == im->maxval) {
-      im->maxval *= 1.01; 
-      if (! im->logarithmic) {
-       im->minval *= 0.99;
-      }
-      
-      /* make sure min and max are not both zero */
-      if (im->maxval == 0.0) {
+       im->maxval *= 1.01; 
+       if (! im->logarithmic) {
+           im->minval *= 0.99;
+       }
+       /* make sure min and max are not both zero */
+       if (im->maxval == 0.0) {
            im->maxval = 1.0;
-      }
-        
+       }
     }
     return 0;
 }
@@ -1005,7 +1126,7 @@ find_first_time(
     )
 {
     struct tm tm;
-    tm = *localtime(&start);
+    localtime_r(&start, &tm);
     switch(baseint){
     case TMT_SECOND:
        tm.tm_sec -= tm.tm_sec % basestep; break;
@@ -1058,7 +1179,7 @@ find_next_time(
 {
     struct tm tm;
     time_t madetime;
-    tm = *localtime(&current);
+    localtime_r(&current, &tm);
     do {
        switch(baseint){
        case TMT_SECOND:
@@ -1163,14 +1284,15 @@ print_calc(image_desc_t *im, char ***prdata)
            } /* prepare printval */
 
            if (!strcmp(im->gdes[i].format,"%c")) { /* VDEF time print */
+               char ctime_buf[128]; /* PS: for ctime_r, must be >= 26 chars */
                if (im->gdes[i].gf == GF_PRINT){
                    (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
                    sprintf((*prdata)[prlines-2],"%s (%lu)",
-                                       ctime(&printtime),printtime);
+                                       ctime_r(&printtime,ctime_buf),printtime);
                    (*prdata)[prlines-1] = NULL;
                } else {
                    sprintf(im->gdes[i].legend,"%s (%lu)",
-                                       ctime(&printtime),printtime);
+                                       ctime_r(&printtime,ctime_buf),printtime);
                    graphelement = 1;
                }
            } else {
@@ -1194,8 +1316,9 @@ print_calc(image_desc_t *im, char ***prdata)
 
            if (im->gdes[i].gf == GF_PRINT){
                (*prdata)[prlines-2] = malloc((FMT_LEG_LEN+2)*sizeof(char));
+               (*prdata)[prlines-1] = NULL;
                if (bad_format(im->gdes[i].format)) {
-                       rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
+                       rrd_set_error("bad format for PRINT in '%s'", im->gdes[i].format);
                        return -1;
                }
 #ifdef HAVE_SNPRINTF
@@ -1203,12 +1326,11 @@ print_calc(image_desc_t *im, char ***prdata)
 #else
                sprintf((*prdata)[prlines-2],im->gdes[i].format,printval,si_symb);
 #endif
-               (*prdata)[prlines-1] = NULL;
            } else {
                /* GF_GPRINT */
 
                if (bad_format(im->gdes[i].format)) {
-                       rrd_set_error("bad format for [G]PRINT in '%s'", im->gdes[i].format);
+                       rrd_set_error("bad format for GPRINT in '%s'", im->gdes[i].format);
                        return -1;
                }
 #ifdef HAVE_SNPRINTF
@@ -1220,7 +1342,6 @@ print_calc(image_desc_t *im, char ***prdata)
            }
            }
            break;
-        case GF_COMMENT:
        case GF_LINE:
        case GF_AREA:
        case GF_TICK:
@@ -1229,10 +1350,15 @@ print_calc(image_desc_t *im, char ***prdata)
        case GF_VRULE:
            graphelement = 1;
            break;
+        case GF_COMMENT:
        case GF_DEF:
        case GF_CDEF:       
        case GF_VDEF:       
+#ifdef WITH_PIECHART
        case GF_PART:
+#endif
+       case GF_SHIFT:
+       case GF_XPORT:
            break;
        }
     }
@@ -1246,18 +1372,17 @@ leg_place(image_desc_t *im)
 {
     /* graph labels */
     int   interleg = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
-    int   box =im->text_prop[TEXT_PROP_LEGEND].size*1.5;
     int   border = im->text_prop[TEXT_PROP_LEGEND].size*2.0;
     int   fill=0, fill_last;
     int   leg_c = 0;
-    int   leg_x = border, leg_y = im->ygif;
+    int   leg_x = border, leg_y = im->yimg;
     int   leg_cc;
     int   glue = 0;
     int   i,ii, mark = 0;
     char  prt_fctn; /*special printfunctions */
     int  *legspace;
 
-  if( !(im->extra_flags & NOLEGEND) ) {
+  if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
     if ((legspace = malloc(im->gdes_c*sizeof(int)))==NULL){
        rrd_set_error("malloc for legspace");
        return -1;
@@ -1265,11 +1390,24 @@ leg_place(image_desc_t *im)
 
     for(i=0;i<im->gdes_c;i++){
        fill_last = fill;
+        
+        /* hid legends for rules which are not displayed */
+        
+       if(!(im->extra_flags & FORCE_RULES_LEGEND)) {
+               if (im->gdes[i].gf == GF_HRULE &&
+                   (im->gdes[i].yrule < im->minval || im->gdes[i].yrule > im->maxval))
+                   im->gdes[i].legend[0] = '\0';
+
+               if (im->gdes[i].gf == GF_VRULE &&
+                   (im->gdes[i].xrule < im->start || im->gdes[i].xrule > im->end))
+                   im->gdes[i].legend[0] = '\0';
+       }
 
        leg_cc = strlen(im->gdes[i].legend);
        
        /* is there a controle code ant the end of the legend string ? */ 
-       if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\') {
+       /* and it is not a tab \\t */
+       if (leg_cc >= 2 && im->gdes[i].legend[leg_cc-2] == '\\' && im->gdes[i].legend[leg_cc-1] != 't') {
            prt_fctn = im->gdes[i].legend[leg_cc-1];
            leg_cc -= 2;
            im->gdes[i].legend[leg_cc] = '\0';
@@ -1290,15 +1428,11 @@ leg_place(image_desc_t *im)
               /* no interleg space if string ends in \g */
               fill += legspace[i];
            }
-           if (im->gdes[i].gf != GF_GPRINT && 
-               im->gdes[i].gf != GF_COMMENT) { 
-               fill += box;       
-           }
           fill += gfx_get_text_width(im->canvas, fill+border,
                                      im->text_prop[TEXT_PROP_LEGEND].font,
                                      im->text_prop[TEXT_PROP_LEGEND].size,
                                      im->tabwidth,
-                                     im->gdes[i].legend);
+                                     im->gdes[i].legend, 0);
            leg_c++;
        } else {
           legspace[i]=0;
@@ -1311,7 +1445,7 @@ leg_place(image_desc_t *im)
            if (i == im->gdes_c -1 ) prt_fctn ='l';
            
            /* is it time to place the legends ? */
-           if (fill > im->xgif - 2*border){
+           if (fill > im->ximg - 2*border){
                if (leg_c > 1) {
                    /* go back one */
                    i--; 
@@ -1326,19 +1460,19 @@ leg_place(image_desc_t *im)
        }
 
 
-       if (prt_fctn != '\0'){
+       if (prt_fctn != '\0'){  
            leg_x = border;
            if (leg_c >= 2 && prt_fctn == 'j') {
-               glue = (im->xgif - fill - 2* border) / (leg_c-1);
+               glue = (im->ximg - fill - 2* border) / (leg_c-1);
            } else {
                glue = 0;
            }
-           if (prt_fctn =='c') leg_x =  (im->xgif - fill) / 2.0;
-           if (prt_fctn =='r') leg_x =  im->xgif - fill - border;
+           if (prt_fctn =='c') leg_x =  (im->ximg - fill) / 2.0;
+           if (prt_fctn =='r') leg_x =  im->ximg - fill - border;
 
            for(ii=mark;ii<=i;ii++){
                if(im->gdes[ii].legend[0]=='\0')
-                   continue;
+                   continue; /* skip empty legends */
                im->gdes[ii].leg_x = leg_x;
                im->gdes[ii].leg_y = leg_y;
                leg_x += 
@@ -1346,21 +1480,18 @@ leg_place(image_desc_t *im)
                                      im->text_prop[TEXT_PROP_LEGEND].font,
                                      im->text_prop[TEXT_PROP_LEGEND].size,
                                      im->tabwidth,
-                                     im->gdes[ii].legend) 
+                                     im->gdes[ii].legend, 0
                   + legspace[ii]
                   + glue;
-               if (im->gdes[ii].gf != GF_GPRINT && 
-                   im->gdes[ii].gf != GF_COMMENT) 
-                   leg_x += box;          
-           }       
-           leg_y = leg_y + im->text_prop[TEXT_PROP_LEGEND].size*1.2;
-           if (prt_fctn == 's') leg_y -=  im->text_prop[TEXT_PROP_LEGEND].size*1.2;       
+           }                   
+           leg_y += im->text_prop[TEXT_PROP_LEGEND].size*1.7;
+           if (prt_fctn == 's') leg_y -=  im->text_prop[TEXT_PROP_LEGEND].size;           
            fill = 0;
            leg_c = 0;
            mark = ii;
        }          
     }
-    im->ygif = leg_y;
+    im->yimg = leg_y;
     free(legspace);
   }
   return 0;
@@ -1375,21 +1506,15 @@ leg_place(image_desc_t *im)
 
 
 int
-horizontal_grid(image_desc_t   *im)
+calc_horizontal_grid(image_desc_t   *im)
 {
     double   range;
     double   scaledrange;
     int      pixel,i;
-    int      sgrid,egrid;
-    double   gridstep;
-    double   scaledstep;
-    char     graph_label[100];
-    double   x0,x1,y0;
-    int      labfact,gridind;
+    int      gridind;
     int      decimals, fractionals;
-    char     labfmt[64];
 
-    labfact=2;
+    im->ygrid_scale.labfact=2;
     gridind=-1;
     range =  im->maxval - im->minval;
     scaledrange = range / im->magfact;
@@ -1411,25 +1536,25 @@ horizontal_grid(image_desc_t   *im)
            
            fractionals = floor(log10(range));
            if(fractionals < 0) /* small amplitude. */
-               sprintf(labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
+               sprintf(im->ygrid_scale.labfmt, "%%%d.%df", decimals - fractionals + 1, -fractionals + 1);
            else
-               sprintf(labfmt, "%%%d.1f", decimals + 1);
-           gridstep = pow((double)10, (double)fractionals);
-           if(gridstep == 0) /* range is one -> 0.1 is reasonable scale */
-               gridstep = 0.1;
+               sprintf(im->ygrid_scale.labfmt, "%%%d.1f", decimals + 1);
+           im->ygrid_scale.gridstep = pow((double)10, (double)fractionals);
+           if(im->ygrid_scale.gridstep == 0) /* range is one -> 0.1 is reasonable scale */
+               im->ygrid_scale.gridstep = 0.1;
            /* should have at least 5 lines but no more then 15 */
-           if(range/gridstep < 5)
-                gridstep /= 10;
-           if(range/gridstep > 15)
-                gridstep *= 10;
-           if(range/gridstep > 5) {
-               labfact = 1;
-               if(range/gridstep > 8)
-                   labfact = 2;
+           if(range/im->ygrid_scale.gridstep < 5)
+                im->ygrid_scale.gridstep /= 10;
+           if(range/im->ygrid_scale.gridstep > 15)
+                im->ygrid_scale.gridstep *= 10;
+           if(range/im->ygrid_scale.gridstep > 5) {
+               im->ygrid_scale.labfact = 1;
+               if(range/im->ygrid_scale.gridstep > 8)
+                   im->ygrid_scale.labfact = 2;
            }
            else {
-               gridstep /= 5;
-               labfact = 5;
+               im->ygrid_scale.gridstep /= 5;
+               im->ygrid_scale.labfact = 5;
            }
        }
        else {
@@ -1443,33 +1568,40 @@ horizontal_grid(image_desc_t   *im)
            
            for(i=0; i<4;i++) {
               if (pixel * ylab[gridind].lfac[i] >=  2 * im->text_prop[TEXT_PROP_AXIS].size) {
-                 labfact =  ylab[gridind].lfac[i];
+                 im->ygrid_scale.labfact =  ylab[gridind].lfac[i];
                  break;
               }                          
            } 
            
-           gridstep = ylab[gridind].grid * im->magfact;
+           im->ygrid_scale.gridstep = ylab[gridind].grid * im->magfact;
        }
     } else {
-       gridstep = im->ygridstep;
-       labfact = im->ylabfact;
+       im->ygrid_scale.gridstep = im->ygridstep;
+       im->ygrid_scale.labfact = im->ylabfact;
     }
-    
-   x0=im->xorigin;
-   x1=im->xorigin+im->xsize;
+    return 1;
+}
+
+int draw_horizontal_grid(image_desc_t *im)
+{
+    int      i;
+    double   scaledstep;
+    char     graph_label[100];
+    double X0=im->xorigin;
+    double X1=im->xorigin+im->xsize;
    
-    sgrid = (int)( im->minval / gridstep - 1);
-    egrid = (int)( im->maxval / gridstep + 1);
-    scaledstep = gridstep/im->magfact;
+    int sgrid = (int)( im->minval / im->ygrid_scale.gridstep - 1);
+    int egrid = (int)( im->maxval / im->ygrid_scale.gridstep + 1);
+    scaledstep = im->ygrid_scale.gridstep/im->magfact;
     for (i = sgrid; i <= egrid; i++){
-       y0=ytr(im,gridstep*i);
-       if ( y0 >= im->yorigin-im->ysize
-                && y0 <= im->yorigin){       
-           if(i % labfact == 0){               
+       double Y0=ytr(im,im->ygrid_scale.gridstep*i);
+       if ( Y0 >= im->yorigin-im->ysize
+                && Y0 <= im->yorigin){       
+           if(i % im->ygrid_scale.labfact == 0){               
                if (i==0 || im->symbol == ' ') {
                    if(scaledstep < 1){
                        if(im->extra_flags & ALTYGRID) {
-                           sprintf(graph_label,labfmt,scaledstep*i);
+                           sprintf(graph_label,im->ygrid_scale.labfmt,scaledstep*i);
                        }
                        else {
                            sprintf(graph_label,"%4.1f",scaledstep*i);
@@ -1486,22 +1618,24 @@ horizontal_grid(image_desc_t   *im)
                }
 
               gfx_new_text ( im->canvas,
-                             x0-im->text_prop[TEXT_PROP_AXIS].size/1.5, y0,
+                             X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
                              im->graph_col[GRC_FONT],
                              im->text_prop[TEXT_PROP_AXIS].font,
                              im->text_prop[TEXT_PROP_AXIS].size,
                              im->tabwidth, 0.0, GFX_H_RIGHT, GFX_V_CENTER,
                              graph_label );
-              gfx_new_line ( im->canvas,
-                             x0-2,y0,
-                             x1+2,y0,
-                             MGRIDWIDTH, im->graph_col[GRC_MGRID] );          
+              gfx_new_dashed_line ( im->canvas,
+                             X0-2,Y0,
+                             X1+2,Y0,
+                             MGRIDWIDTH, im->graph_col[GRC_MGRID],
+                             im->grid_dash_on, im->grid_dash_off);            
               
-           } else {            
-              gfx_new_line ( im->canvas,
-                             x0-1,y0,
-                             x1+1,y0,
-                             GRIDWIDTH, im->graph_col[GRC_GRID] );            
+           } else if (!(im->extra_flags & NOMINOR)) {          
+              gfx_new_dashed_line ( im->canvas,
+                             X0-1,Y0,
+                             X1+1,Y0,
+                             GRIDWIDTH, im->graph_col[GRC_GRID],
+                             im->grid_dash_on, im->grid_dash_off);            
               
            }       
        }       
@@ -1517,7 +1651,7 @@ horizontal_log_grid(image_desc_t   *im)
     int      ii,i;
     int      minoridx=0, majoridx=0;
     char     graph_label[100];
-    double   x0,x1,y0;   
+    double   X0,X1,Y0;   
     double   value, pixperstep, minstep;
 
     /* find grid spaceing */
@@ -1540,8 +1674,8 @@ horizontal_log_grid(image_desc_t   *im)
        if(pixperstep > 2 *  im->text_prop[TEXT_PROP_LEGEND].size){majoridx = i;}
     }
    
-   x0=im->xorigin;
-   x1=im->xorigin+im->xsize;
+   X0=im->xorigin;
+   X1=im->xorigin+im->xsize;
     /* paint minor grid */
     for (value = pow((double)10, log10(im->minval) 
                          - fmod(log10(im->minval),log10(yloglab[minoridx][0])));
@@ -1550,12 +1684,13 @@ horizontal_log_grid(image_desc_t   *im)
        if (value < im->minval) continue;
        i=0;    
        while(yloglab[minoridx][++i] > 0){          
-          y0 = ytr(im,value * yloglab[minoridx][i]);
-          if (y0 <= im->yorigin - im->ysize) break;
-          gfx_new_line ( im->canvas,
-                         x0-1,y0,
-                         x1+1,y0,
-                         GRIDWIDTH, im->graph_col[GRC_GRID] );
+          Y0 = ytr(im,value * yloglab[minoridx][i]);
+          if (Y0 <= im->yorigin - im->ysize) break;
+          gfx_new_dashed_line ( im->canvas,
+                         X0-1,Y0,
+                         X1+1,Y0,
+                         GRIDWIDTH, im->graph_col[GRC_GRID],
+                         im->grid_dash_on, im->grid_dash_off);
        }
     }
 
@@ -1567,16 +1702,17 @@ horizontal_log_grid(image_desc_t   *im)
        if (value < im->minval) continue;
        i=0;    
        while(yloglab[majoridx][++i] > 0){          
-          y0 = ytr(im,value * yloglab[majoridx][i]);    
-          if (y0 <= im->yorigin - im->ysize) break;
-          gfx_new_line ( im->canvas,
-                         x0-2,y0,
-                         x1+2,y0,
-                         MGRIDWIDTH, im->graph_col[GRC_MGRID] );
+          Y0 = ytr(im,value * yloglab[majoridx][i]);    
+          if (Y0 <= im->yorigin - im->ysize) break;
+          gfx_new_dashed_line ( im->canvas,
+                         X0-2,Y0,
+                         X1+2,Y0,
+                         MGRIDWIDTH, im->graph_col[GRC_MGRID],
+                         im->grid_dash_on, im->grid_dash_off);
           
           sprintf(graph_label,"%3.0e",value * yloglab[majoridx][i]);
           gfx_new_text ( im->canvas,
-                         x0-im->text_prop[TEXT_PROP_AXIS].size/1.5, y0,
+                         X0-im->text_prop[TEXT_PROP_AXIS].size/1.5, Y0,
                          im->graph_col[GRC_FONT],
                          im->text_prop[TEXT_PROP_AXIS].font,
                          im->text_prop[TEXT_PROP_AXIS].size,
@@ -1593,11 +1729,11 @@ vertical_grid(
     image_desc_t   *im )
 {   
     int xlab_sel;              /* which sort of label and grid ? */
-    time_t ti, tilab;
+    time_t ti, tilab, timajor;
     long factor;
     char graph_label[100];
-    double x0,y0,y1; /* points for filled graph and more*/
-   
+    double X0,Y0,Y1; /* points for filled graph and more*/
+    struct tm tm;
 
     /* the type of time grid is determined by finding
        the number of seconds per pixel in the graph */
@@ -1619,22 +1755,35 @@ vertical_grid(
     }
     
     /* y coords are the same for every line ... */
-    y0 = im->yorigin;
-    y1 = im->yorigin-im->ysize;
+    Y0 = im->yorigin;
+    Y1 = im->yorigin-im->ysize;
    
 
     /* paint the minor grid */
-    for(ti = find_first_time(im->start,
-                           im->xlab_user.gridtm,
-                           im->xlab_user.gridst);
-       ti < im->end; 
-       ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
-       ){
-       /* are we inside the graph ? */
-       if (ti < im->start || ti > im->end) continue;
-       x0 = xtr(im,ti);       
-       gfx_new_line(im->canvas,x0,y0+1, x0,y1-1,GRIDWIDTH, im->graph_col[GRC_GRID]);
-       
+    if (!(im->extra_flags & NOMINOR))
+    {
+        for(ti = find_first_time(im->start,
+                                im->xlab_user.gridtm,
+                                im->xlab_user.gridst),
+            timajor = find_first_time(im->start,
+                                im->xlab_user.mgridtm,
+                                im->xlab_user.mgridst);
+            ti < im->end; 
+            ti = find_next_time(ti,im->xlab_user.gridtm,im->xlab_user.gridst)
+            ){
+            /* are we inside the graph ? */
+            if (ti < im->start || ti > im->end) continue;
+            while (timajor < ti) {
+                timajor = find_next_time(timajor,
+                        im->xlab_user.mgridtm, im->xlab_user.mgridst);
+            }
+            if (ti == timajor) continue; /* skip as falls on major grid line */
+           X0 = xtr(im,ti);       
+           gfx_new_dashed_line(im->canvas,X0,Y0+1, X0,Y1-1,GRIDWIDTH,
+               im->graph_col[GRC_GRID],
+               im->grid_dash_on, im->grid_dash_off);
+           
+        }
     }
 
     /* paint the major grid */
@@ -1646,28 +1795,31 @@ vertical_grid(
        ){
        /* are we inside the graph ? */
        if (ti < im->start || ti > im->end) continue;
-       x0 = xtr(im,ti);
-       gfx_new_line(im->canvas,x0,y0+2, x0,y1-2,MGRIDWIDTH, im->graph_col[GRC_MGRID]);
+       X0 = xtr(im,ti);
+       gfx_new_dashed_line(im->canvas,X0,Y0+3, X0,Y1-2,MGRIDWIDTH,
+          im->graph_col[GRC_MGRID],
+          im->grid_dash_on, im->grid_dash_off);
        
     }
     /* paint the labels below the graph */
-    for(ti = find_first_time(im->start,
+    for(ti = find_first_time(im->start - im->xlab_user.precis/2,
                            im->xlab_user.labtm,
                            im->xlab_user.labst);
-       ti <= im->end; 
+       ti <= im->end - im->xlab_user.precis/2
        ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
        ){
         tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
        /* are we inside the graph ? */
-       if (ti < im->start || ti > im->end) continue;
+       if (tilab < im->start || tilab > im->end) continue;
 
 #if HAVE_STRFTIME
-       strftime(graph_label,99,im->xlab_user.stst,localtime(&tilab));
+       localtime_r(&tilab, &tm);
+       strftime(graph_label,99,im->xlab_user.stst, &tm);
 #else
 # error "your libc has no strftime I guess we'll abort the exercise here."
 #endif
        gfx_new_text ( im->canvas,
-                     xtr(im,tilab), y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
+                     xtr(im,tilab), Y0+im->text_prop[TEXT_PROP_AXIS].size/1.5,
                      im->graph_col[GRC_FONT],
                      im->text_prop[TEXT_PROP_AXIS].font,
                      im->text_prop[TEXT_PROP_AXIS].size,
@@ -1685,32 +1837,36 @@ axis_paint(
           )
 {   
     /* draw x and y axis */
-    gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
+    /* gfx_new_line ( im->canvas, im->xorigin+im->xsize,im->yorigin,
                      im->xorigin+im->xsize,im->yorigin-im->ysize,
-                     GRIDWIDTH, im->graph_col[GRC_GRID]);
+                     GRIDWIDTH, im->graph_col[GRC_AXIS]);
        
        gfx_new_line ( im->canvas, im->xorigin,im->yorigin-im->ysize,
                         im->xorigin+im->xsize,im->yorigin-im->ysize,
-                        GRIDWIDTH, im->graph_col[GRC_GRID]);
+                        GRIDWIDTH, im->graph_col[GRC_AXIS]); */
    
        gfx_new_line ( im->canvas, im->xorigin-4,im->yorigin,
                         im->xorigin+im->xsize+4,im->yorigin,
-                        MGRIDWIDTH, im->graph_col[GRC_GRID]);
+                        MGRIDWIDTH, im->graph_col[GRC_AXIS]);
    
        gfx_new_line ( im->canvas, im->xorigin,im->yorigin+4,
                         im->xorigin,im->yorigin-im->ysize-4,
-                        MGRIDWIDTH, im->graph_col[GRC_GRID]);
+                        MGRIDWIDTH, im->graph_col[GRC_AXIS]);
    
     
-    /* arrow for X axis direction */
+    /* arrow for X and Y axis direction */
     gfx_new_area ( im->canvas, 
-                  im->xorigin+im->xsize+3,  im->yorigin-3,
-                  im->xorigin+im->xsize+3,  im->yorigin+4,
-                  im->xorigin+im->xsize+8,  im->yorigin+0.5,   // LINEOFFSET
+                  im->xorigin+im->xsize+2,  im->yorigin-2,
+                  im->xorigin+im->xsize+2,  im->yorigin+3,
+                  im->xorigin+im->xsize+7,  im->yorigin+0.5, /* LINEOFFSET */
                   im->graph_col[GRC_ARROW]);
-   
-   
-   
+
+    gfx_new_area ( im->canvas, 
+                  im->xorigin-2,  im->yorigin-im->ysize-2,
+                  im->xorigin+3,  im->yorigin-im->ysize-2,
+                  im->xorigin+0.5,    im->yorigin-im->ysize-7, /* LINEOFFSET */
+                  im->graph_col[GRC_ARROW]);
+
 }
 
 void
@@ -1718,26 +1874,26 @@ grid_paint(image_desc_t   *im)
 {   
     long i;
     int res=0;
-    double x0,y0; /* points for filled graph and more*/
+    double X0,Y0; /* points for filled graph and more*/
     gfx_node_t *node;
 
     /* draw 3d border */
-    node = gfx_new_area (im->canvas, 0,im->ygif,
-                                 2,im->ygif-2,
+    node = gfx_new_area (im->canvas, 0,im->yimg,
+                                 2,im->yimg-2,
                                  2,2,im->graph_col[GRC_SHADEA]);
-    gfx_add_point( node , im->xgif - 2, 2 );
-    gfx_add_point( node , im->xgif, 0 );
+    gfx_add_point( node , im->ximg - 2, 2 );
+    gfx_add_point( node , im->ximg, 0 );
     gfx_add_point( node , 0,0 );
-/*    gfx_add_point( node , 0,im->ygif ); */
+/*    gfx_add_point( node , 0,im->yimg ); */
    
-    node =  gfx_new_area (im->canvas, 2,im->ygif-2,
-                                  im->xgif-2,im->ygif-2,
-                                  im->xgif - 2, 2,
+    node =  gfx_new_area (im->canvas, 2,im->yimg-2,
+                                  im->ximg-2,im->yimg-2,
+                                  im->ximg - 2, 2,
                                  im->graph_col[GRC_SHADEB]);
-    gfx_add_point( node ,   im->xgif,0);
-    gfx_add_point( node ,   im->xgif,im->ygif);
-    gfx_add_point( node ,   0,im->ygif);
-/*    gfx_add_point( node , 0,im->ygif ); */
+    gfx_add_point( node ,   im->ximg,0);
+    gfx_add_point( node ,   im->ximg,im->yimg);
+    gfx_add_point( node ,   0,im->yimg);
+/*    gfx_add_point( node , 0,im->yimg ); */
    
    
     if (im->draw_x_grid == 1 )
@@ -1747,13 +1903,13 @@ grid_paint(image_desc_t   *im)
        if(im->logarithmic){
                res = horizontal_log_grid(im);
        } else {
-               res = horizontal_grid(im);
+               res = draw_horizontal_grid(im);
        }
 
        /* dont draw horizontal grid if there is no min and max val */
        if (! res ) {
          char *nodata = "No Data found";
-          gfx_new_text(im->canvas,im->xgif/2, (2*im->yorigin-im->ysize) / 2,
+          gfx_new_text(im->canvas,im->ximg/2, (2*im->yorigin-im->ysize) / 2,
                        im->graph_col[GRC_FONT],
                        im->text_prop[TEXT_PROP_AXIS].font,
                        im->text_prop[TEXT_PROP_AXIS].size,
@@ -1762,86 +1918,77 @@ grid_paint(image_desc_t   *im)
        }
     }
 
-    /* yaxis description */
-       if (im->canvas->imgformat != IF_PNG) {
-           gfx_new_text( im->canvas,
-                         7, (im->yorigin - im->ysize/2),
-                         im->graph_col[GRC_FONT],
-                         im->text_prop[TEXT_PROP_AXIS].font,
-                         im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
-                         GFX_H_CENTER, GFX_V_CENTER,
-                         im->ylegend);
-       } else {
-           /* horrible hack until we can actually print vertically */
-           {
-               int n;
-               int l=strlen(im->ylegend);
-               char s[2];
-               for (n=0;n<strlen(im->ylegend);n++) {
-                   s[0]=im->ylegend[n];
-                   s[1]='\0';
-                   gfx_new_text(im->canvas,7,im->text_prop[TEXT_PROP_AXIS].size*(l-n),
-                       im->graph_col[GRC_FONT],
-                       im->text_prop[TEXT_PROP_AXIS].font,
-                       im->text_prop[TEXT_PROP_AXIS].size, im->tabwidth, 270.0,
-                       GFX_H_CENTER, GFX_V_CENTER,
-                       s);
-               }
-           }
-       }
-   
+    /* yaxis unit description */
+    gfx_new_text( im->canvas,
+                  7, (im->yorigin - im->ysize/2),
+                  im->graph_col[GRC_FONT],
+                  im->text_prop[TEXT_PROP_UNIT].font,
+                  im->text_prop[TEXT_PROP_UNIT].size, im->tabwidth, 
+                  RRDGRAPH_YLEGEND_ANGLE,
+                  GFX_H_LEFT, GFX_V_CENTER,
+                  im->ylegend);
+
     /* graph title */
     gfx_new_text( im->canvas,
-                 im->xgif/2, im->text_prop[TEXT_PROP_TITLE].size,
+                 im->ximg/2, im->text_prop[TEXT_PROP_TITLE].size*1.2,
                  im->graph_col[GRC_FONT],
                  im->text_prop[TEXT_PROP_TITLE].font,
                  im->text_prop[TEXT_PROP_TITLE].size, im->tabwidth, 0.0,
                  GFX_H_CENTER, GFX_V_CENTER,
                  im->title);
-
+    
     /* graph labels */
-    if( !(im->extra_flags & NOLEGEND) ) {
-      for(i=0;i<im->gdes_c;i++){
-       if(im->gdes[i].legend[0] =='\0')
-           continue;
-        
-       /* im->gdes[i].leg_y is the bottom of the legend */
-               x0 = im->gdes[i].leg_x;
-               y0 = im->gdes[i].leg_y;
-               /* Box needed? */
-               if (       im->gdes[i].gf != GF_GPRINT
-                       && im->gdes[i].gf != GF_COMMENT) {
-                   int boxH, boxV;
-
-                   boxH = gfx_get_text_width(im->canvas, 0,
-                               im->text_prop[TEXT_PROP_AXIS].font,
-                               im->text_prop[TEXT_PROP_AXIS].size,
-                               im->tabwidth,"M") * 1.25;
-                   boxV = boxH;
-
-                   node = gfx_new_area(im->canvas,
-                               x0,y0-boxV,
-                               x0,y0,
-                               x0+boxH,y0,
-                               im->gdes[i].col);
-                   gfx_add_point ( node, x0+boxH, y0-boxV );
-                   node = gfx_new_line(im->canvas,
-                               x0,y0-boxV, x0,y0,
-                               1,0x000000FF);
-                   gfx_add_point(node,x0+boxH,y0);
-                   gfx_add_point(node,x0+boxH,y0-boxV);
-                   gfx_close_path(node);
-                   x0 += boxH / 1.25 * 2;
-               }
-               gfx_new_text ( im->canvas, x0, y0,
+    if( !(im->extra_flags & NOLEGEND) & !(im->extra_flags & ONLY_GRAPH) ) {
+            for(i=0;i<im->gdes_c;i++){
+                    if(im->gdes[i].legend[0] =='\0')
+                            continue;
+                    
+                    /* im->gdes[i].leg_y is the bottom of the legend */
+                    X0 = im->gdes[i].leg_x;
+                    Y0 = im->gdes[i].leg_y;
+                    gfx_new_text ( im->canvas, X0, Y0,
                                   im->graph_col[GRC_FONT],
-                                  im->text_prop[TEXT_PROP_AXIS].font,
-                                  im->text_prop[TEXT_PROP_AXIS].size,
+                                  im->text_prop[TEXT_PROP_LEGEND].font,
+                                  im->text_prop[TEXT_PROP_LEGEND].size,
                                   im->tabwidth,0.0, GFX_H_LEFT, GFX_V_BOTTOM,
                                   im->gdes[i].legend );
-             }
-          }
-       }
+                   /* The legend for GRAPH items starts with "M " to have
+                       enough space for the box */
+                    if (          im->gdes[i].gf != GF_PRINT &&
+                                  im->gdes[i].gf != GF_GPRINT &&
+                                   im->gdes[i].gf != GF_COMMENT) {
+                            int boxH, boxV;
+                            
+                            boxH = gfx_get_text_width(im->canvas, 0,
+                                                      im->text_prop[TEXT_PROP_LEGEND].font,
+                                                      im->text_prop[TEXT_PROP_LEGEND].size,
+                                                      im->tabwidth,"M", 0)*1.2;
+                            boxV = boxH;
+                            
+                            /* make sure transparent colors show up all the same */
+                           node = gfx_new_area(im->canvas,
+                                                X0,Y0-boxV,
+                                                X0,Y0,
+                                                X0+boxH,Y0,
+                                                im->graph_col[GRC_CANVAS]);
+                            gfx_add_point ( node, X0+boxH, Y0-boxV );
+
+                            node = gfx_new_area(im->canvas,
+                                                X0,Y0-boxV,
+                                                X0,Y0,
+                                                X0+boxH,Y0,
+                                                im->gdes[i].col);
+                            gfx_add_point ( node, X0+boxH, Y0-boxV );
+                            node = gfx_new_line(im->canvas,
+                                                X0,Y0-boxV, X0,Y0,
+                                                1,im->graph_col[GRC_FONT]);
+                            gfx_add_point(node,X0+boxH,Y0);
+                            gfx_add_point(node,X0+boxH,Y0-boxV);
+                            gfx_close_path(node);
+                    }
+            }
+    }
+}
 
 
 /*****************************************************
@@ -1851,21 +1998,21 @@ grid_paint(image_desc_t   *im)
 int lazy_check(image_desc_t *im){
     FILE *fd = NULL;
        int size = 1;
-    struct stat  gifstat;
+    struct stat  imgstat;
     
     if (im->lazy == 0) return 0; /* no lazy option */
-    if (stat(im->graphfile,&gifstat) != 0) 
+    if (stat(im->graphfile,&imgstat) != 0) 
       return 0; /* can't stat */
     /* one pixel in the existing graph is more then what we would
        change here ... */
-    if (time(NULL) - gifstat.st_mtime > 
+    if (time(NULL) - imgstat.st_mtime > 
        (im->end - im->start) / im->xsize) 
       return 0;
     if ((fd = fopen(im->graphfile,"rb")) == NULL) 
       return 0; /* the file does not exist */
     switch (im->canvas->imgformat) {
     case IF_PNG:
-          size = PngSize(fd,&(im->xgif),&(im->ygif));
+          size = PngSize(fd,&(im->ximg),&(im->yimg));
           break;
     default:
           size = 1;
@@ -1874,6 +2021,7 @@ int lazy_check(image_desc_t *im){
     return size;
 }
 
+#ifdef WITH_PIECHART
 void
 pie_part(image_desc_t *im, gfx_color_t color,
            double PieCenterX, double PieCenterY, double Radius,
@@ -1920,8 +2068,16 @@ pie_part(image_desc_t *im, gfx_color_t color,
     }
 }
 
+#endif
+
 int
-graph_size_location(image_desc_t *im, int elements, int piechart )
+graph_size_location(image_desc_t *im, int elements
+
+#ifdef WITH_PIECHART
+, int piechart
+#endif
+
+ )
 {
     /* The actual size of the image to draw is determined from
     ** several sources.  The size given on the command line is
@@ -1947,16 +2103,32 @@ graph_size_location(image_desc_t *im, int elements, int piechart )
        Xtitle   =0,    Ytitle   =0,
        Xylabel  =0,    Yylabel  =0,
        Xmain    =0,    Ymain    =0,
+#ifdef WITH_PIECHART
        Xpie     =0,    Ypie     =0,
+#endif
        Xxlabel  =0,    Yxlabel  =0,
+#if 0
        Xlegend  =0,    Ylegend  =0,
-       Xspacing =10,   Yspacing =10;
+#endif
+        Xspacing =10,  Yspacing =10;
 
-    if (im->ylegend[0] != '\0') {
-       Xvertical = im->text_prop[TEXT_PROP_LEGEND].size *2;
-       Yvertical = im->text_prop[TEXT_PROP_LEGEND].size * (strlen(im->ylegend)+1);
+    if (im->extra_flags & ONLY_GRAPH) {
+       im->xorigin =0;
+       im->ximg = im->xsize;
+        im->yimg = im->ysize;
+        im->yorigin = im->ysize;
+       return 0;
     }
 
+    if (im->ylegend[0] != '\0' ) {
+           Xvertical = im->text_prop[TEXT_PROP_UNIT].size *2;
+           Yvertical = gfx_get_text_width(im->canvas, 0,
+                                          im->text_prop[TEXT_PROP_UNIT].font,
+                                          im->text_prop[TEXT_PROP_UNIT].size,
+                                          im->tabwidth,im->ylegend, 0);
+    }
+
+
     if (im->title[0] != '\0') {
        /* The title is placed "inbetween" two text lines so it
        ** automatically has some vertical spacing.  The horizontal
@@ -1966,8 +2138,8 @@ graph_size_location(image_desc_t *im, int elements, int piechart )
                im->text_prop[TEXT_PROP_TITLE].font,
                im->text_prop[TEXT_PROP_TITLE].size,
                im->tabwidth,
-               im->title) + 2*Xspacing;
-       Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2;
+               im->title, 0) + 2*Xspacing;
+       Ytitle = im->text_prop[TEXT_PROP_TITLE].size*2.5;
     }
 
     if (elements) {
@@ -1975,19 +2147,21 @@ graph_size_location(image_desc_t *im, int elements, int piechart )
        Ymain=im->ysize;
        if (im->draw_x_grid) {
            Xxlabel=Xmain;
-           Yxlabel=im->text_prop[TEXT_PROP_LEGEND].size *2;
+           Yxlabel=im->text_prop[TEXT_PROP_AXIS].size *2.5;
        }
        if (im->draw_y_grid) {
-           Xylabel=im->text_prop[TEXT_PROP_LEGEND].size *6;
+           Xylabel=im->text_prop[TEXT_PROP_AXIS].size *6;
            Yylabel=Ymain;
        }
     }
 
+#ifdef WITH_PIECHART
     if (piechart) {
        im->piesize=im->xsize<im->ysize?im->xsize:im->ysize;
        Xpie=im->piesize;
        Ypie=im->piesize;
     }
+#endif
 
     /* Now calculate the total size.  Insert some spacing where
        desired.  im->xorigin and im->yorigin need to correspond
@@ -2000,13 +2174,23 @@ graph_size_location(image_desc_t *im, int elements, int piechart )
     ** forget about it at all; the legend will have to fit in the
     ** size already allocated.
     */
-    im->xgif = Xylabel + Xmain + Xpie + Xspacing;
-    if (Xmain) im->xgif += Xspacing;
-    if (Xpie) im->xgif += Xspacing;
+    im->ximg = Xylabel + Xmain + 2 * Xspacing;
+
+#ifdef WITH_PIECHART
+    im->ximg  += Xpie;
+#endif
+
+    if (Xmain) im->ximg += Xspacing;
+#ifdef WITH_PIECHART
+    if (Xpie) im->ximg += Xspacing;
+#endif
+
     im->xorigin = Xspacing + Xylabel;
-    if (Xtitle > im->xgif) im->xgif = Xtitle;
-    if (Xvertical) {
-       im->xgif += Xvertical;
+
+    if (Xtitle > im->ximg) im->ximg = Xtitle;
+
+    if (Xvertical) { /* unit description */
+       im->ximg += Xvertical;
        im->xorigin += Xvertical;
     }
     xtr(im,0);
@@ -2021,47 +2205,56 @@ graph_size_location(image_desc_t *im, int elements, int piechart )
     */
 
     /* reserve space for main and/or pie */
-    im->ygif = Ymain + Yxlabel;
-    if (im->ygif < Ypie) im->ygif = Ypie;
-    im->yorigin = im->ygif - Yxlabel;
+
+    im->yimg = Ymain + Yxlabel;
+
+#ifdef WITH_PIECHART
+    if (im->yimg < Ypie) im->yimg = Ypie;
+#endif
+
+    im->yorigin = im->yimg - Yxlabel;
+
     /* reserve space for the title *or* some padding above the graph */
     if (Ytitle) {
-       im->ygif += Ytitle;
+       im->yimg += Ytitle;
        im->yorigin += Ytitle;
     } else {
-       im->ygif += Yspacing;
+       im->yimg += Yspacing;
        im->yorigin += Yspacing;
     }
     /* reserve space for padding below the graph */
-    im->ygif += Yspacing;
+    im->yimg += Yspacing;
     ytr(im,DNAN);
 
     /* Determine where to place the legends onto the image.
-    ** Adjust im->ygif to match the space requirements.
+    ** Adjust im->yimg to match the space requirements.
     */
     if(leg_place(im)==-1)
        return -1;
 
     /* last of three steps: check total height of image */
-    if (im->ygif < Yvertical) im->ygif = Yvertical;
+    if (im->yimg < Yvertical) im->yimg = Yvertical;
 
 #if 0
-    if (Xlegend > im->xgif) {
-       im->xgif = Xlegend;
+    if (Xlegend > im->ximg) {
+       im->ximg = Xlegend;
        /* reposition Pie */
+    }
 #endif
 
+#ifdef WITH_PIECHART
     /* The pie is placed in the upper right hand corner,
     ** just below the title (if any) and with sufficient
     ** padding.
     */
     if (elements) {
-       im->pie_x = im->xgif - Xspacing - Xpie/2;
+       im->pie_x = im->ximg - Xspacing - Xpie/2;
         im->pie_y = im->yorigin-Ymain+Ypie/2;
     } else {
-       im->pie_x = im->xgif/2;
+       im->pie_x = im->ximg/2;
         im->pie_y = im->yorigin-Ypie/2;
     }
+#endif
 
     return 0;
 }
@@ -2072,27 +2265,30 @@ graph_paint(image_desc_t *im, char ***calcpr)
 {
   int i,ii;
   int lazy =     lazy_check(im);
+#ifdef WITH_PIECHART
   int piechart = 0;
   double PieStart=0.0;
+#endif
   FILE  *fo;
   gfx_node_t *node;
   
   double areazero = 0.0;
   enum gf_en stack_gf = GF_PRINT;
   graph_desc_t *lastgdes = NULL;    
-  
+
   /* if we are lazy and there is nothing to PRINT ... quit now */
   if (lazy && im->prt_c==0) return 0;
-  
+
   /* pull the data from the rrd files ... */
   
   if(data_fetch(im)==-1)
     return -1;
-  
+
   /* evaluate VDEF and CDEF operations ... */
   if(data_calc(im)==-1)
     return -1;
-  
+
+#ifdef WITH_PIECHART  
   /* check if we need to draw a piechart */
   for(i=0;i<im->gdes_c;i++){
     if (im->gdes[i].gf == GF_PART) {
@@ -2100,6 +2296,7 @@ graph_paint(image_desc_t *im, char ***calcpr)
       break;
     }
   }
+#endif
 
   /* calculate and PRINT and GPRINT definitions. We have to do it at
    * this point because it will affect the length of the legends
@@ -2108,10 +2305,16 @@ graph_paint(image_desc_t *im, char ***calcpr)
    */
   i=print_calc(im,calcpr);
   if(i<0) return -1;
-  if(((i==0)&&(piechart==0)) || lazy) return 0;
+  if(((i==0)
+#ifdef WITH_PIECHART
+&&(piechart==0)
+#endif
+) || lazy) return 0;
 
+#ifdef WITH_PIECHART
   /* If there's only the pie chart to draw, signal this */
   if (i==0) piechart=2;
+#endif
   
   /* get actual drawing data and find min and max values*/
   if(data_proc(im)==-1)
@@ -2123,11 +2326,22 @@ graph_paint(image_desc_t *im, char ***calcpr)
     expand_range(im);   /* make sure the upper and lower limit are
                            sensible values */
 
+  if (!calc_horizontal_grid(im))
+    return -1;
+
+  if (im->gridfit)
+    apply_gridfit(im);
+
+
 /**************************************************************
  *** Calculating sizes and locations became a bit confusing ***
  *** so I moved this into a separate function.              ***
  **************************************************************/
-  if(graph_size_location(im,i,piechart)==-1)
+  if(graph_size_location(im,i
+#ifdef WITH_PIECHART
+,piechart
+#endif
+)==-1)
     return -1;
 
   /* the actual graph is created by going through the individual
@@ -2135,13 +2349,15 @@ graph_paint(image_desc_t *im, char ***calcpr)
   
   node=gfx_new_area ( im->canvas,
                       0, 0,
-                      im->xgif, 0,
-                      im->xgif, im->ygif,
+                      im->ximg, 0,
+                      im->ximg, im->yimg,
                       im->graph_col[GRC_BACK]);
 
-  gfx_add_point(node,0, im->ygif);
+  gfx_add_point(node,0, im->yimg);
 
+#ifdef WITH_PIECHART
   if (piechart != 2) {
+#endif
     node=gfx_new_area ( im->canvas,
                       im->xorigin,             im->yorigin, 
                       im->xorigin + im->xsize, im->yorigin,
@@ -2154,13 +2370,15 @@ graph_paint(image_desc_t *im, char ***calcpr)
       areazero = im->minval;
     if (im->maxval < 0.0)
       areazero = im->maxval;
-  
-    axis_paint(im);
-  }
+#ifdef WITH_PIECHART
+   }
+#endif
 
+#ifdef WITH_PIECHART
   if (piechart) {
     pie_part(im,im->graph_col[GRC_CANVAS],im->pie_x,im->pie_y,im->piesize*0.5,0,2*M_PI);
   }
+#endif
 
   for(i=0;i<im->gdes_c;i++){
     switch(im->gdes[i].gf){
@@ -2172,6 +2390,8 @@ graph_paint(image_desc_t *im, char ***calcpr)
     case GF_COMMENT:
     case GF_HRULE:
     case GF_VRULE:
+    case GF_XPORT:
+    case GF_SHIFT:
       break;
     case GF_TICK:
       for (ii = 0; ii < im->xsize; ii++)
@@ -2204,83 +2424,79 @@ graph_paint(image_desc_t *im, char ***calcpr)
           
         }
       } /* for */
-      
-      if (im->gdes[i].col != 0x0){               
+
+      /* *******************************************************
+                   ___ 
+                 |   |    ___
+              ____|   |   |   |
+              |       |___|
+       -------|---------------------------------------      
+                      
+      if we know the value of y at time t was a then 
+      we draw a square from t-1 to t with the value a.
+
+      ********************************************************* */
+      if (im->gdes[i].col != 0x0){   
         /* GF_LINE and friend */
         if(stack_gf == GF_LINE ){
           node = NULL;
           for(ii=1;ii<im->xsize;ii++){
-            if ( ! isnan(im->gdes[i].p_data[ii-1])
-                 && ! isnan(im->gdes[i].p_data[ii])){
-              if (node == NULL){
-                node = gfx_new_line(im->canvas,
-                                    ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
+           if (isnan(im->gdes[i].p_data[ii])){
+               node = NULL;
+               continue;
+           }
+            if ( node == NULL ) {
+                 node = gfx_new_line(im->canvas,
+                                    ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
                                     ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
                                     im->gdes[i].linewidth,
                                     im->gdes[i].col);
-              } else {
-                gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
-              }
-            } else {
-              node = NULL;
-            }
+             } else {
+               gfx_add_point(node,ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
+               gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
+             };
+
           }
         } else {
-          int area_start=-1;
-          node = NULL;
           for(ii=1;ii<im->xsize;ii++){
-            /* open an area */
-            if ( ! isnan(im->gdes[i].p_data[ii-1])
-                 && ! isnan(im->gdes[i].p_data[ii])){
-              if (node == NULL){
-                float ybase = 0.0;
-                if (im->gdes[i].gf == GF_STACK) {
-                  ybase = ytr(im,lastgdes->p_data[ii-1]);
-                } else {
-                  ybase =  ytr(im,areazero);
-                }
-                area_start = ii-1;
-                node = gfx_new_area(im->canvas,
-                                    ii-1+im->xorigin,ybase,
-                                    ii-1+im->xorigin,ytr(im,im->gdes[i].p_data[ii-1]),
-                                    ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]),
-                                    im->gdes[i].col
-                                    );
-              } else {
-                gfx_add_point(node,ii+im->xorigin,ytr(im,im->gdes[i].p_data[ii]));
-              }
+           /* keep things simple for now, just draw these bars
+              do not try to build a big and complex area */
+           float ybase,ytop;
+           if ( isnan(im->gdes[i].p_data[ii]) ) {
+               continue;
+           }
+            ytop = ytr(im,im->gdes[i].p_data[ii]);
+           if ( im->gdes[i].stack ) {
+                  ybase = ytr(im,lastgdes->p_data[ii]);
+            } else {
+                  ybase = ytr(im,areazero);
             }
-
-            if ( node != NULL && (ii+1==im->xsize || isnan(im->gdes[i].p_data[ii]) )){
-              /* GF_AREA STACK type*/
-              if (im->gdes[i].gf == GF_STACK ) {
-                int iii;
-                for (iii=ii-1;iii>area_start;iii--){
-                  gfx_add_point(node,iii+im->xorigin,ytr(im,lastgdes->p_data[iii]));
-                }
-              } else {
-                gfx_add_point(node,ii+im->xorigin,ytr(im,areazero));
-              };
-              node=NULL;
-            };
+            if ( ybase == ytop ){
+               continue;
+           }
+            node = gfx_new_area(im->canvas,
+                                ii-1+im->xorigin,ybase,
+                                ii-1+im->xorigin,ytop,
+                                ii+im->xorigin,ytop,                           
+                                im->gdes[i].col
+                               );
+            gfx_add_point(node,ii+im->xorigin,ybase);
           }             
         } /* else GF_LINE */
       } /* if color != 0x0 */
       /* make sure we do not run into trouble when stacking on NaN */
       for(ii=0;ii<im->xsize;ii++){
         if (isnan(im->gdes[i].p_data[ii])) {
-          double ybase = 0.0;
-          if (lastgdes) {
-            ybase = ytr(im,lastgdes->p_data[ii-1]);
-          };
-          if (isnan(ybase) || !lastgdes ){
-            ybase =  ytr(im,areazero);
+          if (lastgdes && (im->gdes[i].stack)) {
+            im->gdes[i].p_data[ii] = lastgdes->p_data[ii];
+          } else {
+            im->gdes[i].p_data[ii] =  ytr(im,areazero);
           }
-          im->gdes[i].p_data[ii] = ybase;
         }
       } 
       lastgdes = &(im->gdes[i]);                         
       break;
+#ifdef WITH_PIECHART
     case GF_PART:
       if(isnan(im->gdes[i].yrule)) /* fetch variable */
        im->gdes[i].yrule = im->gdes[im->gdes[i].vidx].vf.val;
@@ -2293,14 +2509,23 @@ graph_paint(image_desc_t *im, char ***calcpr)
        PieStart += im->gdes[i].yrule;
       }
       break;
+#endif
+       
     } /* switch */
   }
+#ifdef WITH_PIECHART
   if (piechart==2) {
     im->draw_x_grid=0;
     im->draw_y_grid=0;
   }
+#endif
+
+  if( !(im->extra_flags & ONLY_GRAPH) )  
+      axis_paint(im);
+
   /* grid_paint also does the text */
-  grid_paint(im);
+  if( !(im->extra_flags & ONLY_GRAPH) )  
+    grid_paint(im);
   
   /* the RULES are the last thing to paint ... */
   for(i=0;i<im->gdes_c;i++){    
@@ -2335,19 +2560,19 @@ graph_paint(image_desc_t *im, char ***calcpr)
 
   
   if (strcmp(im->graphfile,"-")==0) {
-#ifdef WIN32
+    fo = im->graphhandle ? im->graphhandle : stdout;
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
     /* Change translation mode for stdout to BINARY */
-    _setmode( _fileno( stdout ), O_BINARY );
+    _setmode( _fileno( fo ), O_BINARY );
 #endif
-    fo = stdout;
   } else {
     if ((fo = fopen(im->graphfile,"wb")) == NULL) {
       rrd_set_error("Opening '%s' for write: %s",im->graphfile,
-                    strerror(errno));
+                    rrd_strerror(errno));
       return (-1);
     }
   }
-  gfx_render (im->canvas,im->xgif,im->ygif,0x0,fo);
+  gfx_render (im->canvas,im->ximg,im->yimg,0x0,fo);
   if (strcmp(im->graphfile,"-") != 0)
     fclose(fo);
   return 0;
@@ -2361,13 +2586,7 @@ graph_paint(image_desc_t *im, char ***calcpr)
 int
 gdes_alloc(image_desc_t *im){
 
-    long def_step = (im->end-im->start)/im->xsize;
-    
-    if (im->step > def_step) /* step can be increassed ... no decreassed */
-      def_step = im->step;
-
     im->gdes_c++;
-    
     if ((im->gdes = (graph_desc_t *) rrd_realloc(im->gdes, (im->gdes_c)
                                           * sizeof(graph_desc_t)))==NULL){
        rrd_set_error("realloc graph_descs");
@@ -2375,7 +2594,9 @@ gdes_alloc(image_desc_t *im){
     }
 
 
-    im->gdes[im->gdes_c-1].step=def_step; 
+    im->gdes[im->gdes_c-1].step=im->step;
+    im->gdes[im->gdes_c-1].stack=0;
+    im->gdes[im->gdes_c-1].debug=0;
     im->gdes[im->gdes_c-1].start=im->start; 
     im->gdes[im->gdes_c-1].end=im->end; 
     im->gdes[im->gdes_c-1].vname[0]='\0'; 
@@ -2384,11 +2605,15 @@ gdes_alloc(image_desc_t *im){
     im->gdes[im->gdes_c-1].data_first=0;
     im->gdes[im->gdes_c-1].p_data=NULL;
     im->gdes[im->gdes_c-1].rpnp=NULL;
+    im->gdes[im->gdes_c-1].shift=0;
     im->gdes[im->gdes_c-1].col = 0x0;
     im->gdes[im->gdes_c-1].legend[0]='\0';
+    im->gdes[im->gdes_c-1].format[0]='\0';
     im->gdes[im->gdes_c-1].rrd[0]='\0';
     im->gdes[im->gdes_c-1].ds=-1;    
     im->gdes[im->gdes_c-1].p_data=NULL;    
+    im->gdes[im->gdes_c-1].yrule=DNAN;
+    im->gdes[im->gdes_c-1].xrule=0;
     return 0;
 }
 
@@ -2416,7 +2641,6 @@ scan_for_col(char *input, int len, char *output)
     output[outp] = '\0';
     return inp;
 }
-
 /* Some surgery done on this function, it became ridiculously big.
 ** Things moved:
 ** - initializing     now in rrd_graph_init()
@@ -2424,24 +2648,32 @@ scan_for_col(char *input, int len, char *output)
 ** - script parsing   now in rrd_graph_script()
 */
 int 
-rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
+rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
 {
     image_desc_t   im;
-
+            
     rrd_graph_init(&im);
-
+    im.graphhandle = stream;
+    
     rrd_graph_options(argc,argv,&im);
-    if (rrd_test_error()) return -1;
+    if (rrd_test_error()) {
+       im_free(&im);
+       return -1;
+    }
     
     if (strlen(argv[optind])>=MAXPATH) {
        rrd_set_error("filename (including path) too long");
+       im_free(&im);
        return -1;
     }
     strncpy(im.graphfile,argv[optind],MAXPATH-1);
     im.graphfile[MAXPATH-1]='\0';
 
-    rrd_graph_script(argc,argv,&im);
-    if (rrd_test_error()) return -1;
+    rrd_graph_script(argc,argv,&im,1);
+    if (rrd_test_error()) {
+       im_free(&im);
+       return -1;
+    }
 
     /* Everything is now read and the actual work can start */
 
@@ -2455,8 +2687,10 @@ rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
     ** Also, if needed, print a line with information about the image.
     */
 
-    *xsize=im.xgif;
-    *ysize=im.ygif;
+    *xsize=im.ximg;
+    *ysize=im.yimg;
+    *ymin=im.minval;
+    *ymax=im.maxval;
     if (im.imginfo) {
        char *filename;
        if (!(*prdata)) {
@@ -2477,7 +2711,7 @@ rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
            filename--;
        }
 
-       sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.xgif),(long)(im.canvas->zoom*im.ygif));
+       sprintf((*prdata)[0],im.imginfo,filename,(long)(im.canvas->zoom*im.ximg),(long)(im.canvas->zoom*im.yimg));
     }
     im_free(&im);
     return 0;
@@ -2486,11 +2720,20 @@ rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize)
 void
 rrd_graph_init(image_desc_t *im)
 {
-    int i;
+    unsigned int i;
 
+#ifdef HAVE_TZSET
+    tzset();
+#endif
+#ifdef HAVE_SETLOCALE
+    setlocale(LC_TIME,"");
+#endif
+    im->yorigin=0;
+    im->xorigin=0;
+    im->minval=0;
     im->xlab_user.minsec = -1;
-    im->xgif=0;
-    im->ygif=0;
+    im->ximg=0;
+    im->yimg=0;
     im->xsize = 400;
     im->ysize = 100;
     im->step = 0;
@@ -2501,6 +2744,7 @@ rrd_graph_init(image_desc_t *im)
     im->unitsexponent= 9999;
     im->extra_flags= 0;
     im->rigid = 0;
+    im->gridfit = 1;
     im->imginfo = NULL;
     im->lazy = 0;
     im->logarithmic = 0;
@@ -2512,13 +2756,42 @@ rrd_graph_init(image_desc_t *im)
     im->gdes_c = 0;
     im->gdes = NULL;
     im->canvas = gfx_new_canvas();
-
+    im->grid_dash_on = 1;
+    im->grid_dash_off = 1;
+    im->tabwidth = 40.0;
+    
     for(i=0;i<DIM(graph_col);i++)
         im->graph_col[i]=graph_col[i];
 
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
+    {
+            char *windir; 
+           char rrd_win_default_font[1000];
+            windir = getenv("windir");
+            /* %windir% is something like D:\windows or C:\winnt */
+            if (windir != NULL) {
+                    strncpy(rrd_win_default_font,windir,999);
+                    rrd_win_default_font[999] = '\0';
+                    strcat(rrd_win_default_font,"\\fonts\\cour.ttf");
+                    for(i=0;i<DIM(text_prop);i++){
+                            strncpy(text_prop[i].font,rrd_win_default_font,sizeof(text_prop[i].font)-1);
+                            text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
+                     }
+    }
+#endif
+    {
+            char *deffont; 
+            deffont = getenv("RRD_DEFAULT_FONT");
+            if (deffont != NULL) {
+                 for(i=0;i<DIM(text_prop);i++){
+                       strncpy(text_prop[i].font,deffont,sizeof(text_prop[i].font)-1);
+                       text_prop[i].font[sizeof(text_prop[i].font)-1] = '\0';
+                }
+            }
+    }
     for(i=0;i<DIM(text_prop);i++){        
       im->text_prop[i].size = text_prop[i].size;
-      im->text_prop[i].font = text_prop[i].font;
+      strcpy(im->text_prop[i].font,text_prop[i].font);
     }
 }
 
@@ -2530,7 +2803,7 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
     char               scan_gtm[12],scan_mtm[12],scan_ltm[12],col_nam[12];
     time_t             start_tmp=0,end_tmp=0;
     long               long_tmp;
-    struct time_value  start_tv, end_tv;
+    struct rrd_time_value      start_tv, end_tv;
     gfx_color_t         color;
 
     parsetime("end-24h", &start_tv);
@@ -2560,42 +2833,62 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            {"lazy",       no_argument,       0,  'z'},
             {"zoom",       required_argument, 0,  'm'},
            {"no-legend",  no_argument,       0,  'g'},
-           {"alt-y-grid", no_argument,       0,   257 },
-           {"alt-autoscale", no_argument,    0,   258 },
-           {"alt-autoscale-max", no_argument,    0,   259 },
-           {"units-exponent",required_argument, 0,  260},
-           {"step",       required_argument, 0,   261},
+           {"force-rules-legend",no_argument,0,  'F'},
+            {"only-graph", no_argument,       0,  'j'},
+           {"alt-y-grid", no_argument,       0,  'Y'},
+            {"no-minor",   no_argument,       0,  'I'},
+           {"alt-autoscale", no_argument,    0,  'A'},
+           {"alt-autoscale-max", no_argument, 0, 'M'},
+           {"units-exponent",required_argument, 0, 'X'},
+           {"step",       required_argument, 0,    'S'},
+            {"tabwidth",   required_argument, 0,    'T'},            
+           {"no-gridfit", no_argument,       0,   'N'},
            {0,0,0,0}};
        int option_index = 0;
        int opt;
-
+        int col_start,col_end;
 
        opt = getopt_long(argc, argv, 
-                         "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:z:g",
+                        "s:e:x:y:v:w:h:iu:l:rb:oc:n:m:t:f:a:I:zgjFYAMX:S:NT:",
                          long_options, &option_index);
 
        if (opt == EOF)
            break;
        
        switch(opt) {
-       case 257:
+        case 'I':
+            im->extra_flags |= NOMINOR;
+            break;
+       case 'Y':
            im->extra_flags |= ALTYGRID;
            break;
-       case 258:
+       case 'A':
            im->extra_flags |= ALTAUTOSCALE;
            break;
-       case 259:
+       case 'M':
            im->extra_flags |= ALTAUTOSCALE_MAX;
            break;
+        case 'j':
+           im->extra_flags |= ONLY_GRAPH;
+           break;
        case 'g':
            im->extra_flags |= NOLEGEND;
            break;
-       case 260:
+       case 'F':
+           im->extra_flags |= FORCE_RULES_LEGEND;
+           break;
+       case 'X':
            im->unitsexponent = atoi(optarg);
            break;
-       case 261:
+       case 'T':
+           im->tabwidth = atof(optarg);
+           break;
+       case 'S':
            im->step =  atoi(optarg);
            break;
+       case 262:
+           im->gridfit = 0;
+           break;
        case 's':
            if ((parsetime_error = parsetime(optarg, &start_tv))) {
                rrd_set_error( "start time: %s", parsetime_error );
@@ -2625,13 +2918,14 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
                      &im->xlab_user.precis,
                      &stroff) == 7 && stroff != 0){
                 strncpy(im->xlab_form, optarg+stroff, sizeof(im->xlab_form) - 1);
-               if((im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
+               im->xlab_form[sizeof(im->xlab_form)-1] = '\0'; 
+               if((int)(im->xlab_user.gridtm = tmt_conv(scan_gtm)) == -1){
                    rrd_set_error("unknown keyword %s",scan_gtm);
                    return;
-               } else if ((im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
+               } else if ((int)(im->xlab_user.mgridtm = tmt_conv(scan_mtm)) == -1){
                    rrd_set_error("unknown keyword %s",scan_mtm);
                    return;
-               } else if ((im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
+               } else if ((int)(im->xlab_user.labtm = tmt_conv(scan_ltm)) == -1){
                    rrd_set_error("unknown keyword %s",scan_ltm);
                    return;
                } 
@@ -2708,7 +3002,7 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            im->imginfo = optarg;
            break;
        case 'a':
-           if((im->canvas->imgformat = if_conv(optarg)) == -1) {
+           if((int)(im->canvas->imgformat = if_conv(optarg)) == -1) {
                rrd_set_error("unsupported graphics format '%s'",optarg);
                return;
            }
@@ -2723,13 +3017,25 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            break;
         case 'c':
             if(sscanf(optarg,
-                      "%10[A-Z]#%8lx",
-                      col_nam,&color) == 2){
+                      "%10[A-Z]#%n%8lx%n",
+                      col_nam,&col_start,&color,&col_end) == 2){
                 int ci;
+               int col_len = col_end - col_start;
+               switch (col_len){
+                       case 6:
+                               color = (color << 8) + 0xff /* shift left by 8 */;
+                               break;
+                       case 8:
+                               break;
+                       default:
+                               rrd_set_error("the color format is #RRGGBB[AA]");
+                               return;
+               }
                 if((ci=grc_conv(col_nam)) != -1){
                     im->graph_col[ci]=color;
                 }  else {
                   rrd_set_error("invalid color name '%s'",col_nam);
+                 return;
                 }
             } else {
                 rrd_set_error("invalid color def format");
@@ -2737,35 +3043,26 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
             }
             break;        
         case 'n':{
-                       /* originally this used char *prop = "" and
-                       ** char *font = "dummy" however this results
-                       ** in a SEG fault, at least on RH7.1
-                       **
-                       ** The current implementation isn't proper
-                       ** either, font is never freed and prop uses
-                       ** a fixed width string
-                       */
-           char prop[100];
+           char prop[15];
            double size = 1;
-           char *font;
+           char font[1024];
 
-           font=malloc(255);
            if(sscanf(optarg,
-                               "%10[A-Z]:%lf:%s",
+                               "%10[A-Z]:%lf:%1000s",
                                prop,&size,font) == 3){
                int sindex;
                if((sindex=text_prop_conv(prop)) != -1){
                    im->text_prop[sindex].size=size;              
-                   im->text_prop[sindex].font=font;
+                   strcpy(im->text_prop[sindex].font,font);
                    if (sindex==0) { /* the default */
                        im->text_prop[TEXT_PROP_TITLE].size=size;
-                       im->text_prop[TEXT_PROP_TITLE].font=font;
+                       strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
                        im->text_prop[TEXT_PROP_AXIS].size=size;
-                       im->text_prop[TEXT_PROP_AXIS].font=font;
+                       strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
                        im->text_prop[TEXT_PROP_UNIT].size=size;
-                       im->text_prop[TEXT_PROP_UNIT].font=font;
+                       strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
                        im->text_prop[TEXT_PROP_LEGEND].size=size;
-                       im->text_prop[TEXT_PROP_LEGEND].font=font;
+                       strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
                    }
                } else {
                    rrd_set_error("invalid fonttag '%s'",prop);
@@ -2826,235 +3123,9 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
     
     im->start = start_tmp;
     im->end = end_tmp;
+    im->step = max((long)im->step, (im->end-im->start)/im->xsize);
 }
 
-void
-rrd_graph_script(int argc, char *argv[], image_desc_t *im)
-{
-    int                i;
-    char       symname[100];
-    int                linepass = 0; /* stack must follow LINE*, AREA or STACK */    
-
-    for (i=optind+1;i<argc;i++) {
-       int             argstart=0;
-       int             strstart=0;
-       graph_desc_t    *gdp;
-       char            *line;
-       char            funcname[10],vname[MAX_VNAME_LEN+1],sep[1];
-       double          d;
-       double          linewidth;
-       int             j,k,l,m;
-
-       /* Each command is one element from *argv[], we call this "line".
-       **
-       ** Each command defines the most current gdes inside struct im.
-       ** In stead of typing "im->gdes[im->gdes_c-1]" we use "gdp".
-       */
-       gdes_alloc(im);
-       gdp=&im->gdes[im->gdes_c-1];
-       line=argv[i];
-
-       /* function:newvname=string[:ds-name:CF]        for xDEF
-       ** function:vname[#color[:string]]              for LINEx,AREA,STACK
-       ** function:vname#color[:num[:string]]          for TICK
-       ** function:vname-or-num#color[:string]         for xRULE,PART
-       ** function:vname:CF:string                     for xPRINT
-       ** function:string                              for COMMENT
-       */
-       argstart=0;
-
-       sscanf(line, "%10[A-Z0-9]:%n", funcname,&argstart);
-       if (argstart==0) {
-           rrd_set_error("Cannot parse function in line: %s",line);
-           im_free(im);
-           return;
-       }
-        if(sscanf(funcname,"LINE%lf",&linewidth)){
-                im->gdes[im->gdes_c-1].gf = GF_LINE;
-                im->gdes[im->gdes_c-1].linewidth = linewidth;
-        } else {
-         if ((gdp->gf=gf_conv(funcname))==-1) {
-             rrd_set_error("'%s' is not a valid function name",funcname);
-             im_free(im);
-             return;
-         }
-        }
-
-       /* If the error string is set, we exit at the end of the switch */
-       switch (gdp->gf) {
-           case GF_COMMENT:
-               if (rrd_graph_legend(gdp,&line[argstart])==0)
-                   rrd_set_error("Cannot parse comment in line: %s",line);
-               break;
-           case GF_PART:
-           case GF_VRULE:
-           case GF_HRULE:
-               j=k=l=m=0;
-               sscanf(&line[argstart], "%lf%n#%n", &d, &j, &k);
-               sscanf(&line[argstart], DEF_NAM_FMT "%n#%n", vname, &l, &m);
-               if (k+m==0) {
-                   rrd_set_error("Cannot parse name or num in line: %s",line);
-                   break;
-               }
-               if (j!=0) {
-                   gdp->xrule=d;
-                   gdp->yrule=d;
-                   argstart+=j;
-               } else if (!rrd_graph_check_vname(im,vname,line)) {
-                   gdp->xrule=0;
-                   gdp->yrule=DNAN;
-                   argstart+=l;
-               } else break; /* exit due to wrong vname */
-               if ((j=rrd_graph_color(im,&line[argstart],line,0))==0) break;
-               argstart+=j;
-               if (strlen(&line[argstart])!=0) {
-                   if (rrd_graph_legend(gdp,&line[++argstart])==0)
-                       rrd_set_error("Cannot parse comment in line: %s",line);
-               }
-               break;
-           case GF_STACK:
-               if (linepass==0) {
-                   rrd_set_error("STACK must follow another graphing element");
-                   break;
-               }
-           case GF_LINE:
-           case GF_AREA:
-           case GF_TICK:
-               j=k=0;
-               linepass=1;
-               sscanf(&line[argstart],DEF_NAM_FMT"%n%1[#:]%n",vname,&j,sep,&k);
-               if (j+1!=k)
-                   rrd_set_error("Cannot parse vname in line: %s",line);
-               else if (rrd_graph_check_vname(im,vname,line))
-                   rrd_set_error("Undefined vname '%s' in line: %s",line);
-               else
-                   k=rrd_graph_color(im,&line[argstart],line,1);
-               if (rrd_test_error()) break;
-               argstart=argstart+j+k;
-               if ((strlen(&line[argstart])!=0)&&(gdp->gf==GF_TICK)) {
-                   j=0;
-                   sscanf(&line[argstart], ":%lf%n", &gdp->yrule,&j);
-                   argstart+=j;
-               }
-               if (strlen(&line[argstart])!=0)
-                   if (rrd_graph_legend(gdp,&line[++argstart])==0)
-                       rrd_set_error("Cannot parse legend in line: %s",line);
-               break;
-           case GF_PRINT:
-               im->prt_c++;
-           case GF_GPRINT:
-               j=0;
-               sscanf(&line[argstart], DEF_NAM_FMT ":%n",gdp->vname,&j);
-               if (j==0) {
-                   rrd_set_error("Cannot parse vname in line: '%s'",line);
-                   break;
-               }
-               argstart+=j;
-               if (rrd_graph_check_vname(im,gdp->vname,line)) return;
-               j=0;
-               sscanf(&line[argstart], CF_NAM_FMT ":%n",symname,&j);
-
-               k=(j!=0)?rrd_graph_check_CF(im,symname,line):1;
-#define VIDX im->gdes[gdp->vidx]
-               switch (k) {
-                   case -1: /* looks CF but is not really CF */
-                       if (VIDX.gf == GF_VDEF) rrd_clear_error();
-                       break;
-                   case  0: /* CF present and correct */
-                       if (VIDX.gf == GF_VDEF)
-                           rrd_set_error("Don't use CF when printing VDEF");
-                       argstart+=j;
-                       break;
-                   case  1: /* CF not present */
-                       if (VIDX.gf == GF_VDEF) rrd_clear_error();
-                       else rrd_set_error("Printing DEF or CDEF needs CF");
-                       break;
-                   default:
-                       rrd_set_error("Oops, bug in GPRINT scanning");
-               }
-#undef VIDX
-               if (rrd_test_error()) break;
-
-               if (strlen(&line[argstart])!=0) {
-                   if (rrd_graph_legend(gdp,&line[argstart])==0)
-                       rrd_set_error("Cannot parse legend in line: %s",line);
-               } else rrd_set_error("No legend in (G)PRINT line: %s",line);
-               strcpy(gdp->format, gdp->legend);
-               break;
-           case GF_DEF:
-           case GF_VDEF:
-           case GF_CDEF:
-               j=0;
-               sscanf(&line[argstart], DEF_NAM_FMT "=%n",gdp->vname,&j);
-               if (j==0) {
-                   rrd_set_error("Could not parse line: %s",line);
-                   break;
-               }
-               if (find_var(im,gdp->vname)!=-1) {
-                   rrd_set_error("Variable '%s' in line '%s' already in use\n",
-                                                       gdp->vname,line);
-                   break;
-               }
-               argstart+=j;
-               switch (gdp->gf) {
-                   case GF_DEF:
-                       argstart+=scan_for_col(&line[argstart],MAXPATH,gdp->rrd);
-                       j=k=0;
-                       sscanf(&line[argstart],
-                               ":" DS_NAM_FMT ":" CF_NAM_FMT "%n%*s%n",
-                               gdp->ds_nam, symname, &j, &k);
-                       if ((j==0)||(k!=0)) {
-                           rrd_set_error("Cannot parse DS or CF in '%s'",line);
-                           break;
-                       }
-                       rrd_graph_check_CF(im,symname,line);
-                       break;
-                   case GF_VDEF:
-                       j=0;
-                       sscanf(&line[argstart],DEF_NAM_FMT ",%n",vname,&j);
-                       if (j==0) {
-                           rrd_set_error("Cannot parse vname in line '%s'",line);
-                           break;
-                       }
-                       argstart+=j;
-                       if (rrd_graph_check_vname(im,vname,line)) return;
-                       if (       im->gdes[gdp->vidx].gf != GF_DEF
-                               && im->gdes[gdp->vidx].gf != GF_CDEF) {
-                           rrd_set_error("variable '%s' not DEF nor "
-                               "CDEF in VDEF '%s'", vname,gdp->vname);
-                           break;
-                       }
-                       vdef_parse(gdp,&line[argstart+strstart]);
-                       break;
-                   case GF_CDEF:
-                       if (strstr(&line[argstart],":")!=NULL) {
-                           rrd_set_error("Error in RPN, line: %s",line);
-                           break;
-                       }
-                       if ((gdp->rpnp = rpn_parse(
-                                               (void *)im,
-                                               &line[argstart],
-                                               &find_var_wrapper)
-                               )==NULL)
-                           rrd_set_error("invalid rpn expression in: %s",line);
-                       break;
-                   default: break;
-               }
-               break;
-           default: rrd_set_error("Big oops");
-       }
-       if (rrd_test_error()) {
-           im_free(im);
-           return;
-       }
-    }
-
-    if (im->gdes_c==0){
-       rrd_set_error("can't make a graph without contents");
-       im_free(im); /* ??? is this set ??? */
-       return; 
-    }
-}
 int
 rrd_graph_check_vname(image_desc_t *im, char *varname, char *err)
 {
@@ -3105,54 +3176,44 @@ rrd_graph_color(image_desc_t *im, char *var, char *err, int optional)
        return n;
     }
 }
-int
-rrd_graph_check_CF(image_desc_t *im, char *symname, char *err)
-{
-    if ((im->gdes[im->gdes_c-1].cf=cf_conv(symname))==-1) {
-       rrd_set_error("Unknown CF '%s' in %s",symname,err);
-       return -1;
-    }
-    return 0;
-}
-int
-rrd_graph_legend(graph_desc_t *gdp, char *line)
-{
-    int i;
 
-    i=scan_for_col(line,FMT_LEG_LEN,gdp->legend);
 
-    return (strlen(&line[i])==0);
+int bad_format(char *fmt) {
+    char *ptr;
+    int n=0;
+    ptr = fmt;
+    while (*ptr != '\0')
+        if (*ptr++ == '%') {
+             /* line cannot end with percent char */
+             if (*ptr == '\0') return 1;
+             /* '%s', '%S' and '%%' are allowed */
+             if (*ptr == 's' || *ptr == 'S' || *ptr == '%') ptr++;
+
+             /* or else '% 6.2lf' and such are allowed */
+             else {
+   
+                 /* optional padding character */
+                 if (*ptr == ' ' || *ptr == '+' || *ptr == '-') ptr++;
+  
+                 /* This should take care of 'm.n' with all three optional */
+                 while (*ptr >= '0' && *ptr <= '9') ptr++;
+                 if (*ptr == '.') ptr++;
+                 while (*ptr >= '0' && *ptr <= '9') ptr++;
+  
+                 /* Either 'le', 'lf' or 'lg' must follow here */
+                 if (*ptr++ != 'l') return 1;
+                 if (*ptr == 'e' || *ptr == 'f' || *ptr == 'g') ptr++;
+                 else return 1;
+                 n++;
+            }
+         }
+      
+      return (n!=1); 
 }
 
 
-int bad_format(char *fmt) {
-       char *ptr;
-       int n=0;
-
-       ptr = fmt;
-       while (*ptr != '\0') {
-               if (*ptr == '%') {ptr++;
-                       if (*ptr == '\0') return 1;
-                       while ((*ptr >= '0' && *ptr <= '9') || *ptr == '.') { 
-                               ptr++;
-                       }
-                       if (*ptr == '\0') return 1;
-                       if (*ptr == 'l') {
-                               ptr++;
-                               n++;
-                               if (*ptr == '\0') return 1;
-                               if (*ptr == 'e' || *ptr == 'f') { 
-                                       ptr++; 
-                                       } else { return 1; }
-                       }
-                       else if (*ptr == 's' || *ptr == 'S' || *ptr == '%') { ++ptr; }
-                       else { return 1; }
-               } else {
-                       ++ptr;
-               }
-       }
-       return (n!=1);
-}
 int
 vdef_parse(gdes,str)
 struct graph_desc_t *gdes;
@@ -3167,12 +3228,12 @@ char *str;
     
     n=0;
     sscanf(str,"%le,%29[A-Z]%n",&param,func,&n);
-    if (n==strlen(str)) { /* matched */
+    if (n== (int)strlen(str)) { /* matched */
        ;
     } else {
        n=0;
        sscanf(str,"%29[A-Z]%n",func,&n);
-       if (n==strlen(str)) { /* matched */
+       if (n== (int)strlen(str)) { /* matched */
            param=DNAN;
        } else {
            rrd_set_error("Unknown function string '%s' in VDEF '%s'"
@@ -3239,6 +3300,8 @@ char *str;
     };
     return 0;
 }
+
+
 int
 vdef_calc(im,gdi)
 image_desc_t *im;
@@ -3279,6 +3342,7 @@ printf("DEBUG: start == %lu, end == %lu, %lu steps\n"
                field = (steps-1)*dst->vf.param/100;
                dst->vf.val  = array[field];
                dst->vf.when = 0;       /* no time component */
+               free(array);
 #if 0
 for(step=0;step<steps;step++)
 printf("DEBUG: %3li:%10.2f %c\n",step,array[step],step==field?'*':' ');