Файл: vendor/intervention/image/src/Drivers/Gd/Modifiers/QuantizeColorsModifier.php
Строк: 95
<?php
declare(strict_types=1);
namespace InterventionImageDriversGdModifiers;
use InterventionImageDriversGdCloner;
use InterventionImageExceptionsInputException;
use InterventionImageInterfacesImageInterface;
use InterventionImageInterfacesSpecializedInterface;
use InterventionImageModifiersQuantizeColorsModifier as GenericQuantizeColorsModifier;
class QuantizeColorsModifier extends GenericQuantizeColorsModifier implements SpecializedInterface
{
/**
* {@inheritdoc}
*
* @see ModifierInterface::apply()
*/
public function apply(ImageInterface $image): ImageInterface
{
if ($this->limit <= 0) {
throw new InputException('Quantization limit must be greater than 0.');
}
// no color reduction if the limit is higher than the colors in the img
$colorCount = imagecolorstotal($image->core()->native());
if ($colorCount > 0 && $this->limit > $colorCount) {
return $image;
}
$width = $image->width();
$height = $image->height();
$background = $this->driver()->colorProcessor($image->colorspace())->colorToNative(
$this->driver()->handleInput($this->background)
);
$blendingColor = $this->driver()->handleInput(
$this->driver()->config()->blendingColor
);
foreach ($image as $frame) {
// create new image for color quantization
$reduced = Cloner::cloneEmpty($frame->native(), background: $blendingColor);
// fill with background
imagefill($reduced, 0, 0, $background);
// set transparency
imagecolortransparent($reduced, $background);
// copy original image (colors are limited automatically in the copy process)
imagecopy($reduced, $frame->native(), 0, 0, 0, 0, $width, $height);
// gd library does not support color quantization directly therefore the
// colors are decrease by transforming the image to a palette version
imagetruecolortopalette($reduced, true, $this->limit);
$frame->setNative($reduced);
}
return $image;
}
}