/**
* Generate a new image resource var
*
* @param integer $width
* @param integer $height
* @param string $color
* @param integer $opacity
*
* @return resource
*/
public static function generateImage($width = 100, $height = 100, $color = 'ffffff', $opacity = 127)
{
$RGBColors = ImageWorkshopLib::convertHexToRGB($color);
$image = imagecreatetruecolor($width, $height);
imagesavealpha($image, true);
$color = imagecolorallocatealpha($image, $RGBColors['R'], $RGBColors['G'], $RGBColors['B'], $opacity);
imagefill($image, 0, 0, $color);
return $image;
}
/**
* Initialize a new virgin layer
*
* @param integer $width
* @param integer $height
* @param string $backgroundColor
*
* @return ImageWorkshopLayer
*/
public static function initVirginLayer($width = 100, $height = 100, $backgroundColor = null)
{
$opacity = 0;
if (null === $backgroundColor || $backgroundColor == 'transparent') {
$opacity = 127;
$backgroundColor = 'ffffff';
}
return new ImageWorkshopLayer(ImageWorkshopLib::generateImage($width, $height, $backgroundColor, $opacity));
}
/**
* Resize the background of a layer
*
* @param integer $newWidth
* @param integer $newHeight
*/
public function resizeBackground($newWidth, $newHeight)
{
$oldWidth = $this->width;
$oldHeight = $this->height;
$this->width = $newWidth;
$this->height = $newHeight;
$virginLayoutImage = ImageWorkshopLib::generateImage($this->width, $this->height);
imagecopyresampled($virginLayoutImage, $this->image, 0, 0, 0, 0, $this->width, $this->height, $oldWidth, $oldHeight);
unset($this->image);
$this->image = $virginLayoutImage;
}