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# Basic usage
## Convert a PDF- or Postscript-File to a JPEG
This is the basic way of creating a JPEG from a PDF-File
```
<?php
use Org_Heigl\Ghostscript\Ghostscript;
// Create the Ghostscript-Wrapper
$gs = new Ghostscript ();
// Set the output-device
$gs->setDevice('jpeg')
// Set the input file
->setInputFile('path/to/my/ps/or/pdf/file')
// Set the output file that will be created in the same directory as the input
->setOutputFile('output')
// Set the resolution to 96 pixel per inch
->setResolution(96)
// Set Text-antialiasing to the highest level
->setTextAntiAliasing(Ghostscript::ANTIALIASING_HIGH);
// Set the jpeg-quality to 100 (This is device-dependent!)
->getDevice()->setQuality(100);
// convert the input file to an image
if (true === $gs->render()) {
echo 'success';
} else {
echo 'some error occured';
}
```
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