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<?php |
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namespace App\Http\Controllers; |
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use Illuminate\Http\Request; |
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use App\Http\Controllers\Controller; |
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use Storage; |
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use Requests; |
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use Imagick; |
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class LatexController extends Controller |
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{ |
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public function svg(Request $request) |
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{ |
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$ltxsource = $request->input('ltxsource'); |
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if (is_null($ltxsource)) { |
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return; |
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} |
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if (!Storage::exists('latex-svg/'.urlencode($ltxsource).'.svg')) { |
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self::generateSVG($ltxsource); |
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} |
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return response()->make(Storage::get('latex-svg/'.urlencode($ltxsource).'.svg'), 200)->header('Content-Type', 'image/svg+xml'); |
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} |
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public function png(Request $request) |
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{ |
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$ltxsource = $request->input('ltxsource'); |
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if (is_null($ltxsource)) { |
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return; |
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} |
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if (!Storage::exists('latex-png/'.urlencode($ltxsource).'.png')) { |
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self::generatePNG($ltxsource); |
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} |
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return response()->make(Storage::get('latex-png/'.urlencode($ltxsource).'.png'), 200)->header('Content-Type', 'image/png'); |
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} |
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private static function generatePNG($ltxsource) |
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{ |
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if (!Storage::exists('latex-svg/'.urlencode($ltxsource).'.svg')) { |
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self::generateSVG($ltxsource); |
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} |
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$image = new Imagick(); |
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$image->readImageBlob(Storage::get('latex-svg/'.urlencode($ltxsource).'.svg')); |
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$res = $image->getImageResolution(); |
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$x_ratio = $res['x'] / $image->getImageWidth(); |
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$y_ratio = $res['y'] / $image->getImageHeight(); |
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// $ratio=intval(200/$image->getImageHeight()); |
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$ratio=10; |
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$width=$image->getImageWidth()*$ratio; |
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$height=$image->getImageHeight()*$ratio; |
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$image->removeImage(); |
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$image->setResolution($width*$x_ratio, $height*$y_ratio); |
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$image->setBackgroundColor(new \ImagickPixel('transparent')); |
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$image->readImageBlob(Storage::get('latex-svg/'.urlencode($ltxsource).'.svg')); |
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$image->setImageFormat("png32"); |
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Storage::put('latex-png/'.urlencode($ltxsource).'.png', $image->getImageBlob()); |
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} |
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private static function generateSVG($ltxsource) |
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{ |
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$contents=str_replace('fill:rgb(0%,0%,0%)', 'fill:rgb(0,0,0)', Requests::get('http://www.tlhiv.org/ltxpreview/ltxpreview.cgi?' . http_build_query([ |
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'width' => 10, |
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'height' => 10, |
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'ltx' => '', |
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'ltxsource' => $ltxsource, |
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'result' => 'preview', |
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'init' => 0, |
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]))->body); |
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Storage::put('latex-svg/'.urlencode($ltxsource).'.svg', $contents); |
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} |
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} |
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ZsgsDesign /
NOJ
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