DPI

[Anonymous]

Is there a way to set the DPI on the image created? Thanks for any help in this regard!

[Oneag]

I was able to figure this out after going through the main code, and thought I should post here for any Googlers.

Inside qrimage.php, the jpg and png function calls are using imagepng() and imagejpeg() PHP functions.
http://www.php.net/manual/en/function.imagejpeg.php
http://www.php.net/manual/en/function.imagepng.php
^^ if you are unaware how to use those functions, read more here.

You can change the DPI by modifying this with a hardcoded default, or creating a dropdown to fill a value for quality ($q).

[Oneag]

My final solution (for the jpg() function)

public static function jpg($frame, $filename = false, $pixelPerPoint = 4, $outerFrame = 4,$saveandprint=FALSE)
        {
            $image = self::image($frame, $pixelPerPoint, $outerFrame);
           
            if ($filename === false) {
                Header("Content-type: image/jpeg");
                ImageJpeg($image);
            } else {
                if($saveandprint===TRUE){
                    ImageJpeg($image, $filename, 100);
                    header("Content-type: image/jpeg");
                    ImageJpeg($image, NULL, 100);
                }else{
                    ImageJpeg($image, $filename, 100);

  // Change DPI
  $dpi_x   = 300;
  $dpi_y   = 300;
 
  // Read the file
  $size    = filesize($filename);
  $imageContents   = file_get_contents($filename);

  // Update DPI information in the JPG header
  $imageContents  = chr(1);
  $imageContents  = chr(floor($dpi_x/255));
  $imageContents  = chr(      $dpi_x%255);
  $imageContents  = chr(floor($dpi_y/255));
  $imageContents  = chr(      $dpi_y%255);

  // Write the new JPG
  $f = fopen($filename, 'w');
  fwrite($f, $imageContents, $size);
  fclose($f);
                }
            }
           
            ImageDestroy($image);
        }

This generates a DPI of 301. :)