protected function getThumb($thumbWidth, $thumbHeight, $sharpen = false)
{
if (!$this->image) {
return null;
}
$srcX = 0;
$srcY = 0;
if ($this->width / $this->height > $thumbWidth / $thumbHeight) {
$zoom = $this->width / $this->height / ($thumbWidth / $thumbHeight);
$srcX = ($this->width - $this->width / $zoom) / 2;
$this->width = $this->width / $zoom;
} else {
$zoom = $thumbWidth / $thumbHeight / ($this->width / $this->height);
$srcY = ($this->height - $this->height / $zoom) / 2;
$this->height = $this->height / $zoom;
}
$thumb = imageCreateTrueColor($thumbWidth, $thumbHeight);
imageCopyResampled($thumb, $this->image, 0, 0, $srcX, $srcY, $thumbWidth, $thumbHeight, $this->width, $this->height);
if ($sharpen && function_exists('imageconvolution')) {
$sharpenMatrix = array(array(-1, -1, -1), array(-1, 16, -1), array(-1, -1, -1));
imageConvolution($thumb, $sharpenMatrix, 8, 0);
}
return $thumb;
}
function image_cache_unsharp_mask(&$img)
{
imageConvolution($img, array(array(-1, -1, -1), array(-1, 25, -1), array(-1, -1, -1)), 16, 0);
}
