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Allow to change PNG compression quality #288

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Allow to change PNG compression quality #288

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27 changes: 26 additions & 1 deletion src/Generator.php
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,13 @@ class Generator
*/
protected $imagePercentage = .2;

/**
* The compression quality for PNG image
*
* @var int
*/
protected $compressionQuality = 100;

/**
* Creates a new datatype object and then generates a QrCode.
*
Expand Down Expand Up @@ -461,7 +468,7 @@ public function getRendererStyle(): RendererStyle
public function getFormatter(): ImageBackEndInterface
{
if ($this->format === 'png') {
return new ImagickImageBackEnd('png');
return new ImagickImageBackEnd('png', $this->compressionQuality);
}

if ($this->format === 'eps') {
Expand Down Expand Up @@ -544,6 +551,24 @@ public function createColor(int $red, int $green, int $blue, ?int $alpha = null)
return new Alpha($alpha, new Rgb($red, $green, $blue));
}

/**
* Sets the compression quality
*
* @param int $quality
*
* @return Generator
*/
public function setPngCompression(int $quality)
{
if ($quality < 1 || $quality > 100) {
throw new InvalidArgumentException("\$quality must be between 1 and 100. {$quality} is not valid.");
}

$this->compressionQuality = $quality;

return $this;
}

/**
* Creates a new DataType class dynamically.
*
Expand Down