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<?php
//
// vnStat PHP frontend (c)2006-2010 Bjorge Dijkstra (bjd@jooz.net)
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//
// see file COPYING or at http://www.gnu.org/licenses/gpl.html
// for more information.
//
require 'config.php';
require 'localize.php';
require 'vnstat.php';
validate_input();
require "./themes/$style/theme.php";
function allocate_color($im, $colors)
{
return imagecolorallocatealpha($im, $colors[0], $colors[1], $colors[2], $colors[3]);
}
function init_image()
{
global $im, $xlm, $xrm, $ytm, $ybm, $iw, $ih,$graph, $cl, $iface, $colorscheme, $style;
if ($graph == 'none')
return;
//
// image object
//
$xlm = 70;
$xrm = 20;
$ytm = 35;
$ybm = 60;
if ($graph == 'small')
{
$iw = 300 + $xrm + $xlm;
$ih = 100 + $ytm + $ybm;
}
else
{
$iw = 600 + $xrm + $xlm;
$ih = 200 + $ytm + $ybm;
}
$im = imagecreatetruecolor($iw,$ih);
//
// colors
//
$cs = $colorscheme;
$cl['image_background'] = allocate_color($im, $cs['image_background']);
$cl['background'] = allocate_color($im, $cs['graph_background']);
$cl['background_2'] = allocate_color($im, $cs['graph_background_2']);
$cl['grid_stipple_1'] = allocate_color($im, $cs['grid_stipple_1']);
$cl['grid_stipple_2'] = allocate_color($im, $cs['grid_stipple_2']);
$cl['text'] = allocate_color($im, $cs['text']);
$cl['border'] = allocate_color($im, $cs['border']);
$cl['rx'] = allocate_color($im, $cs['rx']);
$cl['rx_border'] = allocate_color($im, $cs['rx_border']);
$cl['tx'] = allocate_color($im, $cs['tx']);
$cl['tx_border'] = allocate_color($im, $cs['tx_border']);
imagefilledrectangle($im,0,0,$iw,$ih,$cl['image_background']);
imagefilledrectangle($im,$xlm,$ytm,$iw-$xrm,$ih-$ybm, $cl['background']);
$x_step = ($iw - $xlm - $xrm) / 12;
$depth = ($x_step / 8) + 4;
imagefilledpolygon($im, array($xlm, $ytm, $xlm, $ih - $ybm, $xlm - $depth, $ih - $ybm + $depth, $xlm - $depth, $ytm + $depth), 4, $cl['background_2']);
imagefilledpolygon($im, array($xlm, $ih - $ybm, $xlm - $depth, $ih - $ybm + $depth, $iw - $xrm - $depth, $ih - $ybm + $depth, $iw - $xrm, $ih - $ybm), 4, $cl['background_2']);
// draw title
$text = T('Traffic data for')." $iface";
$bbox = imagettfbbox(10, 0, GRAPH_FONT, $text);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 10, 0, ($iw-$textwidth)/2, ($ytm/2), $cl['text'], GRAPH_FONT, $text);
}
function draw_border()
{
global $im,$cl,$iw,$ih;
imageline($im, 0, 0,$iw-1, 0, $cl['border']);
imageline($im, 0,$ih-1,$iw-1,$ih-1, $cl['border']);
imageline($im, 0, 0, 0,$ih-1, $cl['border']);
imageline($im, $iw-1, 0,$iw-1,$ih-1, $cl['border']);
}
function draw_grid($x_ticks, $y_ticks)
{
global $im, $cl, $iw, $ih, $xlm, $xrm, $ytm, $ybm;
$x_step = ($iw - $xlm - $xrm) / $x_ticks;
$y_step = ($ih - $ytm - $ybm) / $y_ticks;
$depth = 10;//($x_step / 8) + 4;
$ls = array($cl['grid_stipple_1'],$cl['grid_stipple_2']);
imagesetstyle($im, $ls);
for ($i=$xlm;$i<=($iw-$xrm); $i += $x_step)
{
imageline($im, $i, $ytm, $i, $ih - $ybm, IMG_COLOR_STYLED);
imageline($im, $i, $ih - $ybm, $i - $depth, $ih - $ybm + $depth, IMG_COLOR_STYLED);
}
for ($i=$ytm;$i<=($ih-$ybm); $i += $y_step)
{
imageline($im, $xlm, $i, $iw - $xrm, $i, IMG_COLOR_STYLED);
imageline($im, $xlm, $i, $xlm - $depth, $i + $depth, IMG_COLOR_STYLED);
}
imageline($im, $xlm, $ytm, $xlm, $ih - $ybm, $cl['border']);
imageline($im, $xlm, $ih - $ybm, $iw - $xrm, $ih - $ybm, $cl['border']);
}
function draw_data($data)
{
global $im,$cl,$iw,$ih,$xlm,$xrm,$ytm,$ybm;
sort($data);
$x_ticks = count($data);
$y_ticks = 10;
$y_scale = 1;
$prescale = 1;
$unit = 'K';
$offset = 0;
$gr_h = $ih - $ytm - $ybm;
$x_step = ($iw - $xlm - $xrm) / $x_ticks;
$y_step = ($ih - $ytm - $ybm) / $y_ticks;
$bar_w = ($x_step / 2) ;
//
// determine scale
//
$low = 99999999999;
$high = 0;
for ($i=0; $i<$x_ticks; $i++)
{
if ($data[$i]['rx'] < $low)
$low = $data[$i]['rx'];
if ($data[$i]['tx'] < $low)
$low = $data[$i]['tx'];
if ($data[$i]['rx'] > $high)
$high = $data[$i]['rx'];
if ($data[$i]['tx'] > $high)
$high = $data[$i]['tx'];
}
while ($high > ($prescale * $y_scale * $y_ticks))
{
$y_scale = $y_scale * 2;
if ($y_scale >= 1024)
{
$prescale = $prescale * 1024;
$y_scale = $y_scale / 1024;
if ($unit == 'K')
$unit = 'M';
else if ($unit == 'M')
$unit = 'G';
else if ($unit == 'G')
$unit = 'T';
}
}
draw_grid($x_ticks, $y_ticks);
//
// graph scale factor (per pixel)
//
imagesetthickness($im, 1);
$sf = ($prescale * $y_scale * $y_ticks) / $gr_h;
if ($data[0] == 'nodata')
{
$text = 'no data available';
$bbox = imagettfbbox(10, 0, GRAPH_FONT, $text);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 10, 0, ($iw-$textwidth)/2, $ytm + 80, $cl['text'], GRAPH_FONT, $text);
}
else
{
//
// draw bars
//
for ($i=0; $i<$x_ticks; $i++)
{
$x = $xlm + ($i * $x_step);
$y = $ytm + ($ih - $ytm - $ybm) - (($data[$i]['rx'] - $offset) / $sf);
$depth = $x_step / 8;
$space = 0;
$x1 = $x;
$y1 = $y;
$x2 = $x + $bar_w - $space;
$y2 = $ih - $ybm;
imagefilledrectangle($im, $x1, $y1, $x2, $y2, $cl['rx']);
imagerectangle($im, $x1, $y1, $x2, $y2, $cl['rx_border']);
imagefilledrectangle($im, $x1 - $depth, $y1 + $depth, $x2 -$depth, $y2 + $depth, $cl['rx']);
imagerectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['rx_border']);
imagefilledpolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['rx']);
imagepolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['rx_border']);
imagefilledpolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['rx']);
imagepolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['rx_border']);
$y1 = $ytm + ($ih - $ytm - $ybm) - (($data[$i]['tx'] - $offset) / $sf);
$x1 = $x1 + $bar_w;
$x2 = $x2 + $bar_w;
imagefilledrectangle($im, $x1, $y1, $x2, $y2, $cl['tx']);
imagerectangle($im, $x1, $y1, $x2, $y2, $cl['tx_border']);
imagefilledrectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['tx']);
imagerectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['tx_border']);
imagefilledpolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['tx']);
imagepolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['tx_border']);
imagefilledpolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['tx']);
imagepolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['tx_border']);
}
//
// axis labels
//
for ($i=0; $i<=$y_ticks; $i++)
{
$label = ($i * $y_scale).$unit;
$bbox = imagettfbbox(8, 0, GRAPH_FONT, $label);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 8, 0, $xlm - $textwidth - 16, ($ih - $ybm) - ($i * $y_step) + 8 + $depth, $cl['text'], GRAPH_FONT, $label);
}
for ($i=0; $i<$x_ticks; $i++)
{
$label = $data[$i]['img_label'];
$bbox = imagettfbbox(9, 0, GRAPH_FONT, $label);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 9, 0, $xlm + ($i * $x_step) + ($x_step / 2) - ($textwidth / 2) - $depth - 4, $ih - $ybm + 20 + $depth, $cl['text'], GRAPH_FONT, $label);
}
}
draw_border();
//
// legend
//
imagefilledrectangle($im, $xlm, $ih-$ybm+39, $xlm+8,$ih-$ybm+47,$cl['rx']);
imagerectangle($im, $xlm, $ih-$ybm+39, $xlm+8,$ih-$ybm+47,$cl['text']);
imagettftext($im, 8,0, $xlm+14, $ih-$ybm+48,$cl['text'], GRAPH_FONT,'bytes in');
imagefilledrectangle($im, $xlm+120 , $ih-$ybm+39, $xlm+128,$ih-$ybm+47,$cl['tx']);
imagerectangle($im, $xlm+120, $ih-$ybm+39, $xlm+128,$ih-$ybm+47,$cl['text']);
imagettftext($im, 8,0, $xlm+134, $ih-$ybm+48,$cl['text'], GRAPH_FONT,'bytes out');
}
function output_image()
{
global $page,$hour,$day,$month,$im,$iface;
if ($page == 'summary')
return;
init_image();
if ($page == 'h')
{
draw_data($hour);
}
else if ($page == 'd')
{
draw_data($day);
}
else if ($page == 'm')
{
draw_data($month);
}
header('Content-type: image/png');
imagepng($im);
}
get_vnstat_data();
output_image();
?>