92 lines
2.3 KiB
PHP
92 lines
2.3 KiB
PHP
<?php // content="text/plain; charset=utf-8"
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require_once "jpgraph/jpgraph.php";
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require_once "jpgraph/jpgraph_canvas.php";
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// We accept a URI argument to adjust the angle at what we display the text
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if( empty($_GET['a']) ) {
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$angle=40;
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}
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else {
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$angle=$_GET['a'];
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}
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// Caption below the image
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$caption = "Demonstration of different anchor points for texts as specified with\n".
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"TextAlign(). The red cross marks the coordinate that was given to\n".
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"stroke each instance of the string.\n(The green box is the bounding rectangle for the text.)";
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$txt="TextAlign()";
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// Initial width and height since we need a "dummy" canvas to
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// calculate the height of the text strings
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$w=480;$h=50;
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$xm=90;$ym=80;
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$g = new CanvasGraph($w,$h);
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// Make the image easier to access
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$img = $g->img;
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// Get the bounding box for text
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$img->SetFont(FF_ARIAL,FS_NORMAL,16);
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$tw=$img->GetBBoxWidth($txt,$angle);
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$th=$img->GetBBoxHeight($txt,$angle);
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$img->SetFont(FF_ARIAL,FS_NORMAL,11);
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$ch=$img->GetBBoxHeight($caption);
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// Calculate needed height for the image
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$h = 3*$th+2*$ym + $ch;
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$g = new CanvasGraph($w,$h);
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$img = $g->img;
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// Alignment for anchor points to use
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$anchors = array('left','top',
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'center','top',
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'right','top',
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'left','center',
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'center','center',
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'right','center',
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'left','bottom',
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'center','bottom',
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'right','bottom');
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$n = count($anchors)/2;
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for( $i=0,$r=0,$c=0; $i < $n; ++$i ) {
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$x = $c*($tw+$xm)+$xm/2;
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$y = $r*($th+$ym)+$ym/2-10;
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$img->SetColor('blue');
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$img->SetTextAlign($anchors[$i*2],$anchors[$i*2+1]);
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$img->SetFont(FF_ARIAL,FS_NORMAL,16);
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$img->StrokeText($x,$y,$txt,$angle,"left",true);
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$img->SetColor('black');
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$img->SetFont(FF_FONT1,FS_BOLD);
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$img->SetTextAlign('center','top');
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$align = sprintf('("%s","%s")',$anchors[$i*2],$anchors[$i*2+1]);
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$img->StrokeText($c*($tw/2+$xm)+$xm/2+$tw/2,$r*($th/2+$ym)+$th+$ym/2-4,$align);
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$c++;
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if( $c==3 ) {
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$c=0;$r++;
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}
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}
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// Draw the caption text
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$img->SetTextAlign('center','bottom');
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$img->SetFont(FF_ARIAL,FS_ITALIC,11);
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$img->StrokeText($w/2,$h-10,$caption,0,'left');
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$img->SetColor('navy');
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$img->Rectangle(0,0,$w-1,$h-1);
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// .. and send back to browser
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$g->Stroke();
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?>
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