TYPO3 Core

if ($this->truecolor && $this->setup['alphaChannel']) {

// support alpha channel transparency

imagealphablending($this->im, FALSE);

imagesavealpha($this->im, TRUE);

// backColor is set to transparent

$BGcols = $this->convertColor($this->setup['backColor']);

$Bcolor = ImageColorAllocateAlpha($this->im, $BGcols[0], $BGcols[1], $BGcols[2], 127);

imagefill($this->im, 0, 0, $Bcolor);

} else {

// backColor is set

$BGcols = $this->convertColor($this->setup['backColor']);

$Bcolor = ImageColorAllocate($this->im, $BGcols[0], $BGcols[1], $BGcols[2]);

ImageFilledRectangle($this->im, 0, 0, $XY[0], $XY[1], $Bcolor);

}