function draw_data($data)
{
global $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)
//
$sf = $prescale * $y_scale * $y_ticks / $gr_h;
if ($data[0] == 'nodata') {
$text = 'no data available';
svg_text($iw / 2, $ytm + 80, $text, array('stroke' => $cl['text']['rgb'], 'fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '16pt', 'text-anchor' => 'middle'));
} else {
//
// draw bars
//
for ($i = 0; $i < $x_ticks; $i++) {
$x = $xlm + $i * $x_step;
$y = $ytm + ($ih - $ytm - $ybm) - ($data[$i]['rx'] - $offset) / $sf;
$depth = $x_ticks < 20 ? 8 : 6;
$space = 0;
$x1 = (int) $x;
$y1 = (int) $y;
$w = (int) ($bar_w - $space);
$h = (int) ($ih - $ybm - $y);
$x2 = (int) ($x + $bar_w - $space);
$y2 = (int) ($ih - $ybm);
svg_group(array('stroke' => $cl['rx_border']['rgb'], 'stroke-opacity' => $cl['rx_border']['opacity'], 'stroke-width' => 1, 'stroke-linejoin' => 'round', 'fill' => $cl['rx']['rgb'], 'fill-opacity' => $cl['rx']['opacity']));
svg_rect($x1, $y1, $w, $h);
svg_rect($x1 - $depth, $y1 + $depth, $w, $h);
svg_poly(array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth));
svg_poly(array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth));
svg_group_end();
$y1 = (int) ($ytm + ($ih - $ytm - $ybm) - ($data[$i]['tx'] - $offset) / $sf);
$x1 = (int) ($x1 + $bar_w);
$x2 = (int) ($x2 + $bar_w);
$w = (int) ($bar_w - $space);
$h = (int) ($ih - $ybm - $y1 - 1);
svg_group(array('stroke' => $cl['tx_border']['rgb'], 'stroke-opacity' => $cl['tx_border']['opacity'], 'stroke-width' => 1, 'stroke-linejoin' => 'round', 'fill' => $cl['tx']['rgb'], 'fill-opacity' => $cl['tx']['opacity']));
svg_rect($x1, $y1, $w, $h);
svg_rect($x1 - $depth, $y1 + $depth, $w, $h);
svg_poly(array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth));
svg_poly(array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth));
svg_group_end();
}
//
// axis labels
//
svg_group(array('fill' => $cl['text']['rgb'], 'fill-opacity' => $cl['text']['opacity'], 'stroke-width' => '0', 'font-family' => SVG_FONT, 'font-size' => '10pt', 'text-anchor' => 'end'));
for ($i = 0; $i <= $y_ticks; $i++) {
$label = $i * $y_scale . $unit;
$tx = $xlm - 16;
$ty = (int) ($ih - $ybm - $i * $y_step + 8 + $depth);
svg_text($tx, $ty, $label);
}
svg_group_end();
svg_group(array('fill' => $cl['text']['rgb'], 'fill-opacity' => $cl['text']['opacity'], 'stroke-width' => '0', 'font-family' => SVG_FONT, 'font-size' => '10pt', 'text-anchor' => 'middle'));
for ($i = 0; $i < $x_ticks; $i++) {
$label = $data[$i]['img_label'];
svg_text($xlm + $i * $x_step + $x_step / 2 - $depth - 4, $ih - $ybm + 20 + $depth, $label);
}
svg_group_end();
}
draw_border();
//
// legend
//
svg_rect($xlm, $ih - $ybm + 39, 8, 8, array('stroke' => $cl['text']['rgb'], 'stroke-width' => 1, 'fill' => $cl['rx']['rgb']));
svg_text($xlm + 14, $ih - $ybm + 48, T('bytes in'), array('fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '8pt'));
svg_rect($xlm + 120, $ih - $ybm + 39, 8, 8, array('stroke' => $cl['text']['rgb'], 'stroke-width' => 1, 'fill' => $cl['tx']['rgb']));
svg_text($xlm + 134, $ih - $ybm + 48, T('bytes out'), array('fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '8pt'));
}
function draw_data($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 ?: 1);
$y_step = ($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 / $gr_h;
if (count($data) == 0) {
$text = T('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, $cl['text'], GRAPH_FONT, T('bytes in'));
imagefilledrectangle($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, T('bytes out'));
}
$minYVal = min(min($y), min($y1));
if ($maxXVal == $minXVal) {
$maxXVal += 10;
$minXVal -= 10;
}
if ($maxYVal == $minYVal) {
$maxYVal += 6;
$minYVal -= 6;
}
//вычисляем масштаб преобразования данных в координаты рабочей области
$scaleX = ($maxX - $x0) / ($maxXVal - $minXVal);
$scaleY = ($maxY - $y0) / ($maxYVal - $minYVal);
//задаем шаг для координатной сетки в пикселах
$xStep = 30;
$yStep = 30;
draw_border($xStep, $yStep, round($xStep / $scaleX, 3), round($yStep / $scaleY, 5));
//отрисовка единственной точки
if (count($x) == 1) {
$x[1] = $x[0] - 0.01 * ($maxXVal - $minXVal);
$y[1] = $y[0] - 0.01 * ($maxYVal - $minYVal);
$x[2] = $x[1];
$y[2] = $y[1] + 0.02 * ($maxYVal - $minYVal);
$x[3] = $x[2] + 0.02 * ($maxXVal - $minXVal);
$y[3] = $y[2];
$x[4] = $x[3];
$y[4] = $y[3] - 0.02 * ($maxYVal - $minYVal);
$x[5] = $x[4] - 0.02 * ($maxXVal - $minXVal);
$y[5] = $y[4];
}
for ($i = 0; $i < count($x); $i++) {
$x[$i] -= $minXVal;
