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<?php
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function getimagefromfile($filename)
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{
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$img_data = getimagesize($filename);
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$ext = image_type_to_extension($img_data[2]);
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switch($ext)
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{
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case '.gif':
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return imagecreatefromgif($filename);
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break;
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case '.jpg':
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case '.jpeg':
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return imagecreatefromjpeg($filename);
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break;
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case '.png':
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return imagecreatefrompng($filename);
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break;
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default:
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return false;
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}
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}
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function crop_resize($filename, $dest_file)
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{
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#REQUIRES: image be at least 300x245
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$source = getimagefromfile($filename);
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if(!$source)
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{
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return false;
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}
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$dest = imagecreatetruecolor(300, 245);
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#attempt to determine scaling factor
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$data = getimagesize($filename);
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#300x245 reduces to 60x49
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$factor = min(floor($data[0]/60), floor($data[1]/49));
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#well, that should give us a good scaling factor
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#now we have to determine what point to start from
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$src_x = floor(($data[0]/2) - ($factor*30));
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$src_y = floor(($data[1]/2) - ($factor*24.5));
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#make sure we don't fuck things up
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if($src_x < 0) $src_x=0;
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if($src_y < 0) $src_y=0;
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#now resample
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imagecopyresampled($dest, $source, 0, 0, $src_x, $src_y, 300, 245, $factor*60, $factor*49);
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#and output
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imagepng($dest, $dest_file);
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return true;
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}
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?>
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