//**************************************
// Name: Bar Charts of arbitrary size
// Description:Both PHP2 and PHP3 versions are now available. This code creates bar charts of arbirary size, color and number. It works with gd1.2 and 1.3 Full description at http://www.jeo.net/php/ by Afan Ottenheimer
// By: PHP Code Exchange
//**************************************
<?php
/* Copyright (C) 1998 Afan Ottenheimer, afan@jeonet.com
This is distributed with NO WARRANTY and under the terms of the GNU GPL.
There is one exception - a license is required if this is incorporated
into, or sold or distributed with a Microsoft product.
You can get a copy of the GNU GPL at http://www.gnu.org/copyleft/gpl.html
*/
/* Some comments about the program:
This creates a chart with the thought that the X axis is
labeled array and the Y axis is real numbers. The Y axis uses a
conversion between graph and data units called n_max_y.
The X axis has no such conversion. Each x-axis-tick can get its
own label xlab[N], where N= an integer.
*/
/* READ DATA HERE */
$maxy = $maxy_in;
if ($maxy == 0) {
echo "Error Max Y = 0 <p>";
exit;
}
SetType($maxy,"double");
/* The x-axis is divided up into $maxx sections going from 0 to $maxx-1 */
$maxx = $maxx_in;
if ($maxx <= 0) {
echo "error maxx <= 0 <p>";
exit;
}
SetType($maxx,"double");
$XSIZE = $XSIZE_in; /* full width of the image in pixels */
SetType($XSIZE,"double");
$YSIZE = $YSIZE_in; /* Full height of the image in pixels */
SetType($YSIZE,"double");
$num_vert_ticks = $num_vert_ticks_in;
if ($num_vert_ticks <= 0) {
echo "error num_vert_ticks <= 0 <p>";
exit;
}
SetType($num_vert_ticks,"double");
$y_title = $y_title_in;
$x_title = $x_title_in;
/* *********END DATA ********** */
/* We have the Header/Content-type after any error messages that might occur */
Header("Content-Type: image/gif");
$x_tot_margin = 100.0;
SetType($x_tot_margin,"double");
$x_left_margin = 77.0; /* distance between left and start of x axis in pixels */
SetType($x_left_margin,"double");
/* The x-axis is divided up into $maxx sections going from 0 to $maxx-1 */
$xscale = ($XSIZE - $x_tot_margin)/$maxx ;
SetType($xscale,"double");
$y_top_margin = 14.0; /* Must be integer */
SetType($y_top_margin,"double");
$y_tot_margin = 80.0; /* Must be integer */
SetType($y_tot_margin,"double");
$yscale = ($YSIZE - $y_tot_margin)/$maxy; /* Maximum Height in Screen Units */
SetType($yscale,"double");
$y_bot_margin = $y_tot_margin - $y_top_margin;
SetType($y_bot_margin,"double");
/* The y-axis is divided up into sections going from 0 to $maxy */
$y_tick_delta = $maxy / $num_vert_ticks;
SetType($y_tick_delta,"double");
$si_units[0] = ""; /* Not yet used */
$si_units[1] = "k";
$si_units[2] = "M";
$si_units[3] = "G";
$si_units[4] = "T";
$small_font = 2; /* fonts = 1,2,3,4 or 5 */
$small_font_width = 6.0; /* width in pixels */
$small_font_height = 10.0; /* height in pixels */
$tiny_font = 1;
$c_blank[0] = "245";
$c_blank[1] = "245";
$c_blank[2] = "245";
$c_light[0] = "194";
$c_light[1] = "194";
$c_light[2] = "194";
$c_dark[0] = "100";
$c_dark[1] = "100";
$c_dark[2] = "100";
$c_major[0] = "255";
$c_major[1] = "0";
$c_major[2] = "0";
$c_grid[0] = "0";
$c_grid[1] = "0";
$c_grid[2] = "0";
$col_in[0] = "0";
$col_in[1] = "235";
$col_in[2] = "12";
$col_inm[0] = "0";
$col_inm[1] = "166";
$col_inm[2] = "33";
$col_out[0] = "0";
$col_out[1] = "94";
$col_out[2] = "255";
$col_outm[0] = "255";
$col_outm[1] = "0";
$col_outm[2] = "255";
/* ################################################# */
/* Some general definitions for the graph generation */
$XSIZE = (($maxx*$xscale)+100);
/* position the graph */
/* translate x/y coord into pixel coord */
old_function ytr $y (
SetType($y,"double");
global $maxy,$yscale,$y_top_margin;
return ($maxy*$yscale+$y_top_margin-(($y)*$yscale));
);
old_function xtr $x (
SetType($x,"double");
global $maxx,$xscale,$growright,$x_left_margin;
if ($growright) {
$tmpret = ($maxx*$xscale+$x_left_margin-(($x)*$xscale)) ;
} else {
$tmpret = ($x_left_margin+(($x)*$xscale));
}
return($tmpret);
);
/* ################################################# */
/* the graph is made ten pixels higher to acomodate the x labels */
$graph = ImageCreate($XSIZE, $YSIZE);
/* Use brush_out and brush_outm for ImageSetBrush valid only for GD v3 */
/*
$brush_out = ImageCreate(1,2);
$brush_outm = ImageCreate(1,2);
$i_outm = ImageColorAllocate($brush_outm,$col_outm[0], $col_outm[1], $col_outm[2]);
$i_out = ImageColorAllocate($brush_out,$col_out[0], $col_out[1], $col_out[2]);
*/
/* the first color allocated will be the background color. */
$i_blank = ImageColorAllocate($graph,$c_blank[0],$c_blank[1],$c_blank[2]);
$i_light = ImageColorAllocate($graph,$c_light[0],$c_light[1],$c_light[2]);
$i_dark = ImageColorAllocate($graph,$c_dark[0],$c_dark[1],$c_dark[2]);
/* ImageColorTransparent($graph, $i_blank); */
/* ImageInterlace($graph, 1); */
$i_grid = ImageColorAllocate($graph,$c_grid[0],$c_grid[1],$c_grid[2] );
$i_major = ImageColorAllocate($graph,$c_major[0],$c_major_g,$c_major_b);
$i_in = ImageColorAllocate($graph,$col_in[0], $col_in[1], $col_in[2]);
$i_inm = ImageColorAllocate($graph,$col_inm[0], $col_inm[1], $col_inm[2]);
/* draw the image border */
ImageLine($graph,0,0,$XSIZE-1,0,$i_light);
ImageLine($graph,1,1,$XSIZE-2,1,$i_light);
ImageLine($graph,0,0,0,$YSIZE-1,$i_light);
ImageLine($graph,1,1,1,$YSIZE-2,$i_light);
ImageLine($graph,$XSIZE-1,0,$XSIZE-1,$YSIZE-1,$i_dark);
ImageLine($graph,0,$YSIZE-1,$XSIZE-1,$YSIZE-1,$i_dark);
ImageLine($graph,$XSIZE-2,1,$XSIZE-2,$YSIZE-2,$i_dark);
ImageLine($graph,1,$YSIZE-2,$XSIZE-2,$YSIZE-2,$i_dark);
/* draw the graph border */
ImageRectangle($graph, xtr(0),ytr(0),xtr($maxx),ytr($maxy),$i_grid);
/*create a dotted style for the grid lines*/
/* Style not supported in PHP/FI2 ???
$styleDotted[0] = $i_grid;
$styleDotted[1] = Transparent;
$styleDotted[2] = Transparent;
ImageSetStyle($graph, $styleDotted, 3);
*/
/* draw the horizontal grid */
/* It would be great to know how wide the font is in pixels. In
C you would use "small_font->w" for GD. Here we guess as $small_font_width
*/
ImageStringUp($graph, $small_font,8, ($small_font_width*strlen($y_title)/2.0) + ytr($maxy/2.0), $y_title, $i_grid);
ImageString($graph, $small_font, -($small_font_width*strlen($x_title)/2.0) + xtr($maxx/2.0) , ($YSIZE - 3.0*$small_font_height), $x_title, $i_grid);
$i = 0;
/* Draw Vertical Ticks */
while ($i<=$num_vert_ticks){
$y_tmp = (DoubleVal($i)*$maxy/$num_vert_ticks);
SetType($y_tmp,"double");
ImageLine($graph,(-10+xtr(0)),ytr($y_tmp),xtr(1),ytr($y_tmp),$i_grid);
ImageLine($graph,(xtr($maxx)+10),ytr($y_tmp),xtr($maxx-1),ytr($y_tmp),$i_grid);
/* gdStyled only supported with GD v3 */
/*ImageLine($graph,xtr(0),ytr($y_tmp),xtr($maxx),ytr($y_tmp),gdStyled); */
ImageLine($graph,xtr(0),ytr($y_tmp),xtr($maxx),ytr($y_tmp),$i_light);
$ylab = sprintf("%6.1f %s",$y_tick_delta*$i,$si_units[0]);
/*
It would be great to know the font height in pixels. In
C you would use "small_font->h" for GD. Here we guess as $small_font_height
*/
ImageString($graph, $small_font,($x_left_margin-54),( -($small_font_height/2.0) + ytr($y_tmp)),$ylab, $i_grid);
$i++;
}
/* draw vertical grid and horizontal labels */
$x = 0;
while ($x<$maxx) {
if ($x_label[$x]) {
ImageString($graph, $small_font,( -(strlen($x_label[$x]) * $small_font_width / 2.0) + xtr(0.5+$x)), ($YSIZE - $y_bot_margin + 1.5*$small_font_height) ,$x_label[$x], $i_grid);
}
if ($y_data[$x] ) { /* Draw a bar */
ImageFilledRectangle($graph, xtr(0.25+$x), ytr($y_data[$x]), xtr(0.75+$x), ytr(0), $i_major);
}
/* FUN DEBUGGING STUFF BELOW */
/*
$tempmid = "mid";
$tempajo = $x;
ImageString($graph, $small_font, xtr($x), ytr(-1), $tempajo, $i_major);
ImageString($graph, $small_font, (-((strlen($tempmid))* $small_font_width /2.0) + xtr((.5+$x)) ), ytr(-1), $tempmid, $i_major);
*/
/* END FUN DEBUGGING STUFF */
$x++;
}
ImageGif($graph);
ImageDestroy($graph);
/*
ImageDestroy($brush_out);
ImageDestroy($brush_outm);
*/
?>
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