misuzu/src/Imaging/Image.php

56 lines
2.1 KiB
PHP

<?php
namespace Misuzu\Imaging;
use InvalidArgumentException;
use UnexpectedValueException;
abstract class Image {
public function __construct($pathOrWidth) {
if(!is_int($pathOrWidth) && !is_string($pathOrWidth))
throw new InvalidArgumentException('The first argument must be or type string to open an image file, or int to set a width for a new image.');
}
public static function create($pathOrWidth, int $height = -1): Image {
if(extension_loaded('imagick'))
return new ImagickImage($pathOrWidth, $height);
if(extension_loaded('gd'))
return new GdImage($pathOrWidth, $height);
throw new UnexpectedValueException('No image manipulation extensions are available.');
}
abstract public function getWidth(): int;
abstract public function getHeight(): int;
abstract public function hasFrames(): bool;
abstract public function next(): bool;
abstract public function resize(int $width, int $height): bool;
abstract public function crop(int $width, int $height, int $x, int $y): bool;
abstract public function setPage(int $width, int $height, int $x, int $y): bool;
abstract public function save(string $path): bool;
abstract public function destroy(): void;
public function squareCrop(int $dimensions): void {
$originalWidth = $this->getWidth();
$originalHeight = $this->getHeight();
if($originalWidth > $originalHeight) {
$targetWidth = $originalWidth * $dimensions / $originalHeight;
$targetHeight = $dimensions;
} else {
$targetWidth = $dimensions;
$targetHeight = $originalHeight * $dimensions / $originalWidth;
}
$targetWidth = (int)$targetWidth;
$targetHeight = (int)$targetHeight;
do {
$this->resize($targetWidth, $targetHeight);
$this->crop(
$dimensions, $dimensions,
(int)ceil(($targetWidth - $dimensions) / 2),
(int)ceil(($targetHeight - $dimensions) / 2)
);
$this->setPage($dimensions, $dimensions, 0, 0);
} while($this->next());
}
}