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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare (strict_types=1);
namespace RectorPrefix202410\Nette\Utils;
use RectorPrefix202410\Nette;
/**
* Basic manipulation with images. Supported types are JPEG, PNG, GIF, WEBP, AVIF and BMP.
*
* <code>
* $image = Image::fromFile('nette.jpg');
* $image->resize(150, 100);
* $image->sharpen();
* $image->send();
* </code>
*
* @method Image affine(array $affine, ?array $clip = null)
* @method void alphaBlending(bool $enable)
* @method void antialias(bool $enable)
* @method void arc(int $centerX, int $centerY, int $width, int $height, int $startAngle, int $endAngle, ImageColor $color)
* @method int colorAllocate(int $red, int $green, int $blue)
* @method int colorAllocateAlpha(int $red, int $green, int $blue, int $alpha)
* @method int colorAt(int $x, int $y)
* @method int colorClosest(int $red, int $green, int $blue)
* @method int colorClosestAlpha(int $red, int $green, int $blue, int $alpha)
* @method int colorClosestHWB(int $red, int $green, int $blue)
* @method void colorDeallocate(int $color)
* @method int colorExact(int $red, int $green, int $blue)
* @method int colorExactAlpha(int $red, int $green, int $blue, int $alpha)
* @method void colorMatch(Image $image2)
* @method int colorResolve(int $red, int $green, int $blue)
* @method int colorResolveAlpha(int $red, int $green, int $blue, int $alpha)
* @method void colorSet(int $index, int $red, int $green, int $blue, int $alpha = 0)
* @method array colorsForIndex(int $color)
* @method int colorsTotal()
* @method int colorTransparent(?int $color = null)
* @method void convolution(array $matrix, float $div, float $offset)
* @method void copy(Image $src, int $dstX, int $dstY, int $srcX, int $srcY, int $srcW, int $srcH)
* @method void copyMerge(Image $src, int $dstX, int $dstY, int $srcX, int $srcY, int $srcW, int $srcH, int $pct)
* @method void copyMergeGray(Image $src, int $dstX, int $dstY, int $srcX, int $srcY, int $srcW, int $srcH, int $pct)
* @method void copyResampled(Image $src, int $dstX, int $dstY, int $srcX, int $srcY, int $dstW, int $dstH, int $srcW, int $srcH)
* @method void copyResized(Image $src, int $dstX, int $dstY, int $srcX, int $srcY, int $dstW, int $dstH, int $srcW, int $srcH)
* @method Image cropAuto(int $mode = IMG_CROP_DEFAULT, float $threshold = .5, ?ImageColor $color = null)
* @method void ellipse(int $centerX, int $centerY, int $width, int $height, ImageColor $color)
* @method void fill(int $x, int $y, ImageColor $color)
* @method void filledArc(int $centerX, int $centerY, int $width, int $height, int $startAngle, int $endAngle, ImageColor $color, int $style)
* @method void filledEllipse(int $centerX, int $centerY, int $width, int $height, ImageColor $color)
* @method void filledPolygon(array $points, ImageColor $color)
* @method void filledRectangle(int $x1, int $y1, int $x2, int $y2, ImageColor $color)
* @method void fillToBorder(int $x, int $y, ImageColor $borderColor, ImageColor $color)
* @method void filter(int $filter, ...$args)
* @method void flip(int $mode)
* @method array ftText(float $size, float $angle, int $x, int $y, ImageColor $color, string $fontFile, string $text, array $options = [])
* @method void gammaCorrect(float $inputgamma, float $outputgamma)
* @method array getClip()
* @method int getInterpolation()
* @method int interlace(?bool $enable = null)
* @method bool isTrueColor()
* @method void layerEffect(int $effect)
* @method void line(int $x1, int $y1, int $x2, int $y2, ImageColor $color)
* @method void openPolygon(array $points, ImageColor $color)
* @method void paletteCopy(Image $source)
* @method void paletteToTrueColor()
* @method void polygon(array $points, ImageColor $color)
* @method void rectangle(int $x1, int $y1, int $x2, int $y2, ImageColor $color)
* @method mixed resolution(?int $resolutionX = null, ?int $resolutionY = null)
* @method Image rotate(float $angle, ImageColor $backgroundColor)
* @method void saveAlpha(bool $enable)
* @method Image scale(int $newWidth, int $newHeight = -1, int $mode = IMG_BILINEAR_FIXED)
* @method void setBrush(Image $brush)
* @method void setClip(int $x1, int $y1, int $x2, int $y2)
* @method void setInterpolation(int $method = IMG_BILINEAR_FIXED)
* @method void setPixel(int $x, int $y, ImageColor $color)
* @method void setStyle(array $style)
* @method void setThickness(int $thickness)
* @method void setTile(Image $tile)
* @method void trueColorToPalette(bool $dither, int $ncolors)
* @method array ttfText(float $size, float $angle, int $x, int $y, ImageColor $color, string $fontfile, string $text, array $options = [])
* @property-read positive-int $width
* @property-read positive-int $height
* @property-read \GdImage $imageResource
*/
class Image
{
use Nette\SmartObject;
/** Prevent from getting resized to a bigger size than the original */
public const ShrinkOnly = 0b1;
/** Resizes to a specified width and height without keeping aspect ratio */
public const Stretch = 0b10;
/** Resizes to fit into a specified width and height and preserves aspect ratio */
public const OrSmaller = 0b0;
/** Resizes while bounding the smaller dimension to the specified width or height and preserves aspect ratio */
public const OrBigger = 0b100;
/** Resizes to the smallest possible size to completely cover specified width and height and reserves aspect ratio */
public const Cover = 0b1000;
/** @deprecated use Image::ShrinkOnly */
public const SHRINK_ONLY = self::ShrinkOnly;
/** @deprecated use Image::Stretch */
public const STRETCH = self::Stretch;
/** @deprecated use Image::OrSmaller */
public const FIT = self::OrSmaller;
/** @deprecated use Image::OrBigger */
public const FILL = self::OrBigger;
/** @deprecated use Image::Cover */
public const EXACT = self::Cover;
/** @deprecated use Image::EmptyGIF */
public const EMPTY_GIF = self::EmptyGIF;
/** image types */
public const JPEG = ImageType::JPEG, PNG = ImageType::PNG, GIF = ImageType::GIF, WEBP = ImageType::WEBP, AVIF = ImageType::AVIF, BMP = ImageType::BMP;
public const EmptyGIF = "GIF89a\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00!\xf9\x04\x01\x00\x00\x00\x00,\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02D\x01\x00;";
private const Formats = [ImageType::JPEG => 'jpeg', ImageType::PNG => 'png', ImageType::GIF => 'gif', ImageType::WEBP => 'webp', ImageType::AVIF => 'avif', ImageType::BMP => 'bmp'];
/**
* @var \GdImage
*/
private $image;
/**
* Returns RGB color (0..255) and transparency (0..127).
* @deprecated use ImageColor::rgb()
*/
public static function rgb(int $red, int $green, int $blue, int $transparency = 0) : array
{
return ['red' => \max(0, \min(255, $red)), 'green' => \max(0, \min(255, $green)), 'blue' => \max(0, \min(255, $blue)), 'alpha' => \max(0, \min(127, $transparency))];
}
/**
* Reads an image from a file and returns its type in $type.
* @throws Nette\NotSupportedException if gd extension is not loaded
* @throws UnknownImageFileException if file not found or file type is not known
* @return static
*/
public static function fromFile(string $file, ?int &$type = null)
{
self::ensureExtension();
$type = self::detectTypeFromFile($file);
if (!$type) {
throw new UnknownImageFileException(\is_file($file) ? "Unknown type of file '{$file}'." : "File '{$file}' not found.");
}
return self::invokeSafe('imagecreatefrom' . self::Formats[$type], $file, "Unable to open file '{$file}'.", __METHOD__);
}
/**
* Reads an image from a string and returns its type in $type.
* @throws Nette\NotSupportedException if gd extension is not loaded
* @throws ImageException
* @return static
*/
public static function fromString(string $s, ?int &$type = null)
{
self::ensureExtension();
$type = self::detectTypeFromString($s);
if (!$type) {
throw new UnknownImageFileException('Unknown type of image.');
}
return self::invokeSafe('imagecreatefromstring', $s, 'Unable to open image from string.', __METHOD__);
}
/**
* @return static
*/
private static function invokeSafe(string $func, string $arg, string $message, string $callee)
{
$errors = [];
$res = Callback::invokeSafe($func, [$arg], function (string $message) use(&$errors) : void {
$errors[] = $message;
});
if (!$res) {
throw new ImageException($message . ' Errors: ' . \implode(', ', $errors));
} elseif ($errors) {
\trigger_error($callee . '(): ' . \implode(', ', $errors), \E_USER_WARNING);
}
return new static($res);
}
/**
* Creates a new true color image of the given dimensions. The default color is black.
* @param positive-int $width
* @param positive-int $height
* @throws Nette\NotSupportedException if gd extension is not loaded
* @param \Nette\Utils\ImageColor|mixed[]|null $color
* @return static
*/
public static function fromBlank(int $width, int $height, $color = null)
{
self::ensureExtension();
if ($width < 1 || $height < 1) {
throw new Nette\InvalidArgumentException('Image width and height must be greater than zero.');
}
$image = new static(\imagecreatetruecolor($width, $height));
if ($color) {
$image->alphablending(\false);
$image->filledrectangle(0, 0, $width - 1, $height - 1, $color);
$image->alphablending(\true);
}
return $image;
}
/**
* Returns the type of image from file.
* @return ImageType::*|null
*/
public static function detectTypeFromFile(string $file, &$width = null, &$height = null) : ?int
{
[$width, $height, $type] = @\getimagesize($file);
// @ - files smaller than 12 bytes causes read error
return isset(self::Formats[$type]) ? $type : null;
}
/**
* Returns the type of image from string.
* @return ImageType::*|null
*/
public static function detectTypeFromString(string $s, &$width = null, &$height = null) : ?int
{
[$width, $height, $type] = @\getimagesizefromstring($s);
// @ - strings smaller than 12 bytes causes read error
return isset(self::Formats[$type]) ? $type : null;
}
/**
* Returns the file extension for the given image type.
* @param ImageType::* $type
* @return value-of<self::Formats>
*/
public static function typeToExtension(int $type) : string
{
if (!isset(self::Formats[$type])) {
throw new Nette\InvalidArgumentException("Unsupported image type '{$type}'.");
}
return self::Formats[$type];
}
/**
* Returns the image type for given file extension.
* @return ImageType::*
*/
public static function extensionToType(string $extension) : int
{
$extensions = \array_flip(self::Formats) + ['jpg' => ImageType::JPEG];
$extension = \strtolower($extension);
if (!isset($extensions[$extension])) {
throw new Nette\InvalidArgumentException("Unsupported file extension '{$extension}'.");
}
return $extensions[$extension];
}
/**
* Returns the mime type for the given image type.
* @param ImageType::* $type
*/
public static function typeToMimeType(int $type) : string
{
return 'image/' . self::typeToExtension($type);
}
/**
* @param ImageType::* $type
*/
public static function isTypeSupported(int $type) : bool
{
self::ensureExtension();
switch ($type) {
case ImageType::JPEG:
return \IMG_JPG;
case ImageType::PNG:
return \IMG_PNG;
case ImageType::GIF:
return \IMG_GIF;
case ImageType::WEBP:
return \IMG_WEBP;
case ImageType::AVIF:
return 256;
case ImageType::BMP:
return \IMG_BMP;
default:
return 0;
}
}
/** @return ImageType[] */
public static function getSupportedTypes() : array
{
self::ensureExtension();
$flag = \imagetypes();
return \array_filter([
$flag & \IMG_GIF ? ImageType::GIF : null,
$flag & \IMG_JPG ? ImageType::JPEG : null,
$flag & \IMG_PNG ? ImageType::PNG : null,
$flag & \IMG_WEBP ? ImageType::WEBP : null,
$flag & 256 ? ImageType::AVIF : null,
// IMG_AVIF
$flag & \IMG_BMP ? ImageType::BMP : null,
]);
}
/**
* Wraps GD image.
*/
public function __construct(\GdImage $image)
{
$this->setImageResource($image);
\imagesavealpha($image, \true);
}
/**
* Returns image width.
* @return positive-int
*/
public function getWidth() : int
{
return \imagesx($this->image);
}
/**
* Returns image height.
* @return positive-int
*/
public function getHeight() : int
{
return \imagesy($this->image);
}
/**
* Sets image resource.
* @return static
*/
protected function setImageResource(\GdImage $image)
{
$this->image = $image;
return $this;
}
/**
* Returns image GD resource.
*/
public function getImageResource() : \GdImage
{
return $this->image;
}
/**
* Scales an image. Width and height accept pixels or percent.
* @param int-mask-of<self::OrSmaller|self::OrBigger|self::Stretch|self::Cover|self::ShrinkOnly> $mode
* @param int|string|null $width
* @param int|string|null $height
* @return static
*/
public function resize($width, $height, int $mode = self::OrSmaller)
{
if ($mode & self::Cover) {
return $this->resize($width, $height, self::OrBigger)->crop('50%', '50%', $width, $height);
}
[$newWidth, $newHeight] = static::calculateSize($this->getWidth(), $this->getHeight(), $width, $height, $mode);
if ($newWidth !== $this->getWidth() || $newHeight !== $this->getHeight()) {
// resize
$newImage = static::fromBlank($newWidth, $newHeight, ImageColor::rgb(0, 0, 0, 0))->getImageResource();
\imagecopyresampled($newImage, $this->image, 0, 0, 0, 0, $newWidth, $newHeight, $this->getWidth(), $this->getHeight());
$this->image = $newImage;
}
if ($width < 0 || $height < 0) {
\imageflip($this->image, $width < 0 ? $height < 0 ? \IMG_FLIP_BOTH : \IMG_FLIP_HORIZONTAL : \IMG_FLIP_VERTICAL);
}
return $this;
}
/**
* Calculates dimensions of resized image. Width and height accept pixels or percent.
* @param int-mask-of<self::OrSmaller|self::OrBigger|self::Stretch|self::Cover|self::ShrinkOnly> $mode
*/
public static function calculateSize(int $srcWidth, int $srcHeight, $newWidth, $newHeight, int $mode = self::OrSmaller) : array
{
if ($newWidth === null) {
} elseif (self::isPercent($newWidth)) {
$newWidth = (int) \round($srcWidth / 100 * \abs($newWidth));
$percents = \true;
} else {
$newWidth = \abs($newWidth);
}
if ($newHeight === null) {
} elseif (self::isPercent($newHeight)) {
$newHeight = (int) \round($srcHeight / 100 * \abs($newHeight));
$mode |= empty($percents) ? 0 : self::Stretch;
} else {
$newHeight = \abs($newHeight);
}
if ($mode & self::Stretch) {
// non-proportional
if (!$newWidth || !$newHeight) {
throw new Nette\InvalidArgumentException('For stretching must be both width and height specified.');
}
if ($mode & self::ShrinkOnly) {
$newWidth = \min($srcWidth, $newWidth);
$newHeight = \min($srcHeight, $newHeight);
}
} else {
// proportional
if (!$newWidth && !$newHeight) {
throw new Nette\InvalidArgumentException('At least width or height must be specified.');
}
$scale = [];
if ($newWidth > 0) {
// fit width
$scale[] = $newWidth / $srcWidth;
}
if ($newHeight > 0) {
// fit height
$scale[] = $newHeight / $srcHeight;
}
if ($mode & self::OrBigger) {
$scale = [\max($scale)];
}
if ($mode & self::ShrinkOnly) {
$scale[] = 1;
}
$scale = \min($scale);
$newWidth = (int) \round($srcWidth * $scale);
$newHeight = (int) \round($srcHeight * $scale);
}
return [\max($newWidth, 1), \max($newHeight, 1)];
}
/**
* Crops image. Arguments accepts pixels or percent.
* @param int|string $left
* @param int|string $top
* @param int|string $width
* @param int|string $height
* @return static
*/
public function crop($left, $top, $width, $height)
{
[$r['x'], $r['y'], $r['width'], $r['height']] = static::calculateCutout($this->getWidth(), $this->getHeight(), $left, $top, $width, $height);
if (\gd_info()['GD Version'] === 'bundled (2.1.0 compatible)') {
$this->image = \imagecrop($this->image, $r);
\imagesavealpha($this->image, \true);
} else {
$newImage = static::fromBlank($r['width'], $r['height'], ImageColor::rgb(0, 0, 0, 0))->getImageResource();
\imagecopy($newImage, $this->image, 0, 0, $r['x'], $r['y'], $r['width'], $r['height']);
$this->image = $newImage;
}
return $this;
}
/**
* Calculates dimensions of cutout in image. Arguments accepts pixels or percent.
* @param int|string $left
* @param int|string $top
* @param int|string $newWidth
* @param int|string $newHeight
*/
public static function calculateCutout(int $srcWidth, int $srcHeight, $left, $top, $newWidth, $newHeight) : array
{
if (self::isPercent($newWidth)) {
$newWidth = (int) \round($srcWidth / 100 * $newWidth);
}
if (self::isPercent($newHeight)) {
$newHeight = (int) \round($srcHeight / 100 * $newHeight);
}
if (self::isPercent($left)) {
$left = (int) \round(($srcWidth - $newWidth) / 100 * $left);
}
if (self::isPercent($top)) {
$top = (int) \round(($srcHeight - $newHeight) / 100 * $top);
}
if ($left < 0) {
$newWidth += $left;
$left = 0;
}
if ($top < 0) {
$newHeight += $top;
$top = 0;
}
$newWidth = \min($newWidth, $srcWidth - $left);
$newHeight = \min($newHeight, $srcHeight - $top);
return [$left, $top, $newWidth, $newHeight];
}
/**
* Sharpens image a little bit.
* @return static
*/
public function sharpen()
{
\imageconvolution($this->image, [
// my magic numbers ;)
[-1, -1, -1],
[-1, 24, -1],
[-1, -1, -1],
], 16, 0);
return $this;
}
/**
* Puts another image into this image. Left and top accepts pixels or percent.
* @param int<0, 100> $opacity 0..100
* @param int|string $left
* @param int|string $top
* @return static
*/
public function place(self $image, $left = 0, $top = 0, int $opacity = 100)
{
$opacity = \max(0, \min(100, $opacity));
if ($opacity === 0) {
return $this;
}
$width = $image->getWidth();
$height = $image->getHeight();
if (self::isPercent($left)) {
$left = (int) \round(($this->getWidth() - $width) / 100 * $left);
}
if (self::isPercent($top)) {
$top = (int) \round(($this->getHeight() - $height) / 100 * $top);
}
$output = $input = $image->image;
if ($opacity < 100) {
$tbl = [];
for ($i = 0; $i < 128; $i++) {
$tbl[$i] = \round(127 - (127 - $i) * $opacity / 100);
}
$output = \imagecreatetruecolor($width, $height);
\imagealphablending($output, \false);
if (!$image->isTrueColor()) {
$input = $output;
\imagefilledrectangle($output, 0, 0, $width, $height, \imagecolorallocatealpha($output, 0, 0, 0, 127));
\imagecopy($output, $image->image, 0, 0, 0, 0, $width, $height);
}
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
$c = \imagecolorat($input, $x, $y);
$c = ($c & 0xffffff) + ($tbl[$c >> 24] << 24);
\imagesetpixel($output, $x, $y, $c);
}
}
\imagealphablending($output, \true);
}
\imagecopy($this->image, $output, $left, $top, 0, 0, $width, $height);
return $this;
}
/**
* Calculates the bounding box for a TrueType text. Returns keys left, top, width and height.
*/
public static function calculateTextBox(string $text, string $fontFile, float $size, float $angle = 0, array $options = []) : array
{
self::ensureExtension();
$box = \imagettfbbox($size, $angle, $fontFile, $text, $options);
return ['left' => $minX = \min([$box[0], $box[2], $box[4], $box[6]]), 'top' => $minY = \min([$box[1], $box[3], $box[5], $box[7]]), 'width' => \max([$box[0], $box[2], $box[4], $box[6]]) - $minX + 1, 'height' => \max([$box[1], $box[3], $box[5], $box[7]]) - $minY + 1];
}
/**
* Draw a rectangle.
*/
public function rectangleWH(int $x, int $y, int $width, int $height, ImageColor $color) : void
{
if ($width !== 0 && $height !== 0) {
$this->rectangle($x, $y, $x + $width + ($width > 0 ? -1 : 1), $y + $height + ($height > 0 ? -1 : 1), $color);
}
}
/**
* Draw a filled rectangle.
*/
public function filledRectangleWH(int $x, int $y, int $width, int $height, ImageColor $color) : void
{
if ($width !== 0 && $height !== 0) {
$this->filledRectangle($x, $y, $x + $width + ($width > 0 ? -1 : 1), $y + $height + ($height > 0 ? -1 : 1), $color);
}
}
/**
* Saves image to the file. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
* @param ImageType::*|null $type
* @throws ImageException
*/
public function save(string $file, ?int $quality = null, ?int $type = null) : void
{
$type = $type ?? self::extensionToType(\pathinfo($file, \PATHINFO_EXTENSION));
$this->output($type, $quality, $file);
}
/**
* Outputs image to string. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
* @param ImageType::* $type
*/
public function toString(int $type = ImageType::JPEG, ?int $quality = null) : string
{
return Helpers::capture(function () use($type, $quality) : void {
$this->output($type, $quality);
});
}
/**
* Outputs image to string.
*/
public function __toString() : string
{
return $this->toString();
}
/**
* Outputs image to browser. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
* @param ImageType::* $type
* @throws ImageException
*/
public function send(int $type = ImageType::JPEG, ?int $quality = null) : void
{
\header('Content-Type: ' . self::typeToMimeType($type));
$this->output($type, $quality);
}
/**
* Outputs image to browser or file.
* @param ImageType::* $type
* @throws ImageException
*/
private function output(int $type, ?int $quality, ?string $file = null) : void
{
switch ($type) {
case ImageType::JPEG:
$quality = $quality === null ? 85 : \max(0, \min(100, $quality));
$success = @\imagejpeg($this->image, $file, $quality);
// @ is escalated to exception
break;
case ImageType::PNG:
$quality = $quality === null ? 9 : \max(0, \min(9, $quality));
$success = @\imagepng($this->image, $file, $quality);
// @ is escalated to exception
break;
case ImageType::GIF:
$success = @\imagegif($this->image, $file);
// @ is escalated to exception
break;
case ImageType::WEBP:
$quality = $quality === null ? 80 : \max(0, \min(100, $quality));
$success = @\imagewebp($this->image, $file, $quality);
// @ is escalated to exception
break;
case ImageType::AVIF:
$quality = $quality === null ? 30 : \max(0, \min(100, $quality));
$success = @\imageavif($this->image, $file, $quality);
// @ is escalated to exception
break;
case ImageType::BMP:
$success = @\imagebmp($this->image, $file);
// @ is escalated to exception
break;
default:
throw new Nette\InvalidArgumentException("Unsupported image type '{$type}'.");
}
if (!$success) {
throw new ImageException(Helpers::getLastError() ?: 'Unknown error');
}
}
/**
* Call to undefined method.
* @throws Nette\MemberAccessException
* @return mixed
*/
public function __call(string $name, array $args)
{
$function = 'image' . $name;
if (!\function_exists($function)) {
ObjectHelpers::strictCall(static::class, $name);
}
foreach ($args as $key => $value) {
if ($value instanceof self) {
$args[$key] = $value->getImageResource();
} elseif ($value instanceof ImageColor || \is_array($value) && isset($value['red'])) {
$args[$key] = $this->resolveColor($value);
}
}
$res = $function($this->image, ...$args);
return \is_resource($res) || $res instanceof \GdImage ? $this->setImageResource($res) : $res;
}
public function __clone()
{
\ob_start(function () {
});
\imagepng($this->image, null, 0);
$this->setImageResource(\imagecreatefromstring(\ob_get_clean()));
}
/**
* @param int|string $num
*/
private static function isPercent(&$num) : bool
{
if (\is_string($num) && \substr_compare($num, '%', -\strlen('%')) === 0) {
$num = (float) \substr($num, 0, -1);
return \true;
} elseif (\is_int($num) || $num === (string) (int) $num) {
$num = (int) $num;
return \false;
}
throw new Nette\InvalidArgumentException("Expected dimension in int|string, '{$num}' given.");
}
/**
* Prevents serialization.
*/
public function __sleep() : array
{
throw new Nette\NotSupportedException('You cannot serialize or unserialize ' . self::class . ' instances.');
}
/**
* @param \Nette\Utils\ImageColor|mixed[] $color
*/
public function resolveColor($color) : int
{
$color = $color instanceof ImageColor ? $color->toRGBA() : \array_values($color);
return \imagecolorallocatealpha($this->image, ...$color) ?: \imagecolorresolvealpha($this->image, ...$color);
}
private static function ensureExtension() : void
{
if (!\extension_loaded('gd')) {
throw new Nette\NotSupportedException('PHP extension GD is not loaded.');
}
}
}