<?php
namespace Spatie\Image\Drivers\Concerns;
use Spatie\Image\Drivers\ImageDriver;
use Spatie\Image\Enums\AlignPosition;
use Spatie\Image\Enums\Fit;
use Spatie\Image\Enums\Unit;
/** @mixin \Spatie\Image\Drivers\ImageDriver */
trait AddsWatermark
{
public function watermark(
ImageDriver|string $watermarkImage,
AlignPosition $position = AlignPosition::BottomRight,
int $paddingX = 0,
int $paddingY = 0,
Unit $paddingUnit = Unit::Pixel,
int $width = 0,
Unit $widthUnit = Unit::Pixel,
int $height = 0,
Unit $heightUnit = Unit::Pixel,
Fit $fit = Fit::Contain,
int $alpha = 100): static
{
if (is_string($watermarkImage)) {
$watermarkImage = (new self)->loadFile($watermarkImage);
}
$this->ensureNumberBetween($alpha, 0, 100, 'alpha');
if ($paddingUnit === Unit::Percent) {
$this->ensureNumberBetween($paddingX, 0, 100, 'paddingX');
$this->ensureNumberBetween($paddingY, 0, 100, 'paddingY');
}
if ($widthUnit === Unit::Percent) {
$this->ensureNumberBetween($width, 0, 100, 'width');
}
if ($heightUnit === Unit::Percent) {
$this->ensureNumberBetween($height, 0, 100, 'height');
}
$paddingX = $this->calculateWatermarkX($paddingX, $paddingUnit);
$paddingY = $this->calculateWatermarkY($paddingY, $paddingUnit);
$width = $width ? $this->calculateWatermarkX($width, $widthUnit) : null;
$height = $height ? $this->calculateWatermarkY($height, $widthUnit) : null;
if (is_null($width) && ! is_null($height)) {
$watermarkImage->height($height);
} elseif (! is_null($width) && is_null($height)) {
$watermarkImage->width($width);
} else {
$watermarkImage->fit($fit, $width, $height);
}
$this->insert($watermarkImage, $position, $paddingX, $paddingY, $alpha);
return $this;
}
protected function calculateWatermarkX(int $x, Unit $unit): int
{
if ($unit === Unit::Percent) {
return $this->getWidth() * $x / 100;
}
return $x;
}
protected function calculateWatermarkY(int $y, Unit $unit): int
{
if ($unit === Unit::Percent) {
return $this->getHeight() * $y / 100;
}
return $y;
}
}