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<?php
namespace League\Glide\Manipulators;
use Intervention\Image\Image;
use League\Glide\Manipulators\Helpers\Color;
use League\Glide\Manipulators\Helpers\Dimension;
/**
* @property string $border
* @property string $dpr
*/
class Border extends BaseManipulator
{
/**
* Perform border image manipulation.
*
* @param Image $image The source image.
*
* @return Image The manipulated image.
*/
public function run(Image $image)
{
if ($border = $this->getBorder($image)) {
list($width, $color, $method) = $border;
if ('overlay' === $method) {
return $this->runOverlay($image, $width, $color);
}
if ('shrink' === $method) {
return $this->runShrink($image, $width, $color);
}
if ('expand' === $method) {
return $this->runExpand($image, $width, $color);
}
}
return $image;
}
/**
* Resolve border amount.
*
* @param Image $image The source image.
*
* @return (float|string)[]|null The resolved border amount.
*
* @psalm-return array{0: float, 1: string, 2: string}|null
*/
public function getBorder(Image $image)
{
if (!$this->border) {
return;
}
$values = explode(',', $this->border);
$width = $this->getWidth($image, $this->getDpr(), isset($values[0]) ? $values[0] : null);
$color = $this->getColor(isset($values[1]) ? $values[1] : null);
$method = $this->getMethod(isset($values[2]) ? $values[2] : null);
if ($width) {
return [$width, $color, $method];
}
}
/**
* Get border width.
*
* @param Image $image The source image.
* @param float $dpr The device pixel ratio.
* @param string $width The border width.
*
* @return float|null The resolved border width.
*/
public function getWidth(Image $image, $dpr, $width)
{
return (new Dimension($image, $dpr))->get($width);
}
/**
* Get formatted color.
*
* @param string $color The color.
*
* @return string The formatted color.
*/
public function getColor($color)
{
return (new Color($color))->formatted();
}
/**
* Resolve the border method.
*
* @param string $method The raw border method.
*
* @return string The resolved border method.
*/
public function getMethod($method)
{
if (!in_array($method, ['expand', 'shrink', 'overlay'], true)) {
return 'overlay';
}
return $method;
}
/**
* Resolve the device pixel ratio.
*
* @return float The device pixel ratio.
*/
public function getDpr()
{
if (!is_numeric($this->dpr)) {
return 1.0;
}
if ($this->dpr < 0 or $this->dpr > 8) {
return 1.0;
}
return (float) $this->dpr;
}
/**
* Run the overlay border method.
*
* @param Image $image The source image.
* @param float $width The border width.
* @param string $color The border color.
*
* @return Image The manipulated image.
*/
public function runOverlay(Image $image, $width, $color)
{
return $image->rectangle(
(int) round($width / 2),
(int) round($width / 2),
(int) round($image->width() - ($width / 2)),
(int) round($image->height() - ($width / 2)),
function ($draw) use ($width, $color) {
$draw->border($width, $color);
}
);
}
/**
* Run the shrink border method.
*
* @param Image $image The source image.
* @param float $width The border width.
* @param string $color The border color.
*
* @return Image The manipulated image.
*/
public function runShrink(Image $image, $width, $color)
{
return $image
->resize(
(int) round($image->width() - ($width * 2)),
(int) round($image->height() - ($width * 2))
)
->resizeCanvas(
(int) round($width * 2),
(int) round($width * 2),
'center',
true,
$color
);
}
/**
* Run the expand border method.
*
* @param Image $image The source image.
* @param float $width The border width.
* @param string $color The border color.
*
* @return Image The manipulated image.
*/
public function runExpand(Image $image, $width, $color)
{
return $image->resizeCanvas(
(int) round($width * 2),
(int) round($width * 2),
'center',
true,
$color
);
}
}