core-bundle/src/Resources/contao/library/Contao/GdImage.php
public function isSemitransparent()
	{
		if (!imageistruecolor($this->gdResource))
		{
			return false;
		}

		$width = imagesx($this->gdResource);
		$height = imagesy($this->gdResource);

		for ($x = 0; $x < $width; $x++)
		{
			for ($y = 0; $y < $height; $y++)
			{
				// Check if the pixel is semitransparent
				$alpha = (imagecolorat($this->gdResource, $x, $y) >> 24) & 0x7F;

				if ($alpha > 0 && $alpha < 127)
				{
					return true;
				}
			}
		}

		return false;
	}
public function isSemitransparent()
	{
		if (!imageistruecolor($this->gdResource))
		{
			return false;
		}

		$width = imagesx($this->gdResource);
		$height = imagesy($this->gdResource);

		for ($x = 0; $x < $width; $x++)
		{
			for ($y = 0; $y < $height; $y++)
			{
				// Check if the pixel is semitransparent
				$alpha = (imagecolorat($this->gdResource, $x, $y) >> 24) & 0x7F;

				if ($alpha > 0 && $alpha < 127)
				{
					return true;
				}
			}
		}

		return false;
	}
public function isSemitransparent ( ) { if ( ! imageistruecolor ( $ this -> gdResource ) ) { return false ; } $ width = imagesx ( $ this -> gdResource ) ; $ height = imagesy ( $ this -> gdResource ) ; for ( $ x = 0 ; $ x < $ width ; $ x ++ ) { for ( $ y = 0 ; $ y < $ height ; $ y ++ ) { // Check if the pixel is semitransparent $ alpha = ( imagecolorat ( $ this -> gdResource , $ x , $ y ) >> 24 ) & 0x7F ; if ( $ alpha > 0 && $ alpha < 127 ) { return true ; } } } return false ; }
Detect if the image contains semitransparent pixels

@return boolean True if the image contains semitransparent pixels
Detect if the image contains semitransparent pixels