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<?php namespace YOOtheme\Image; class GDResource extends BaseResource { /** * @inheritdoc / public static function create($file, $type) { switch ($type) { case 'png': $image = imagecreatefrompng($file); break; case 'gif': $image = imagecreatefromgif($file); break; case 'jpeg': $image = imagecreatefromjpeg($file); break; case 'webp': $image = imagecreatefromwebp($file); break; case 'avif': $image = imagecreatefromavif($file); break; default: $image = false; } return $image ? static::normalizeImage($image) : false; } /* * @inheritdoc / public static function save($image, $file, $type, $quality, $info = []) { if ($type == 'jpeg') { if (!imagejpeg($image, $file, (int) round($quality))) { return false; } if ( is_string($file) && !empty($info['APP13']) && ($iptc = iptcparse($info['APP13'])) && ($data = static::embedIptc($iptc, $file)) && !file_put_contents($file, $data) ) { return false; } return $file; } if ($type == 'png') { imagealphablending($image, false); imagesavealpha($image, true); return imagepng($image, $file, 9) ? $file : false; } if ($type == 'gif') { return imagegif($image, $file) ? $file : false; } if ($type == 'webp') { return imagewebp($image, $file, intval($quality)) ? $file : false; } if ($type == 'avif') { return imageavif($image, $file, intval($quality)) ? $file : false; } return false; } /* * @inheritdoc / public static function doCrop($image, $width, $height, $x, $y) { $cropped = static::createImage($width, $height); imagecopy($cropped, $image, 0, 0, intval($x), intval($y), imagesx($image), imagesy($image)); imagedestroy($image); return $cropped; } /* * @inheritdoc / public static function doCopy( $image, $width, $height, $dstX, $dstY, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight, $background = 'transparent' ) { $resampled = static::createImage($width, $height, $background); imagecopyresampled( $resampled, $image, $dstX, $dstY, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight, ); imagedestroy($image); return $resampled; } /* * @inheritdoc / public static function doResize( $image, $width, $height, $dstWidth, $dstHeight, $background = 'transparent' ) { return static::doCopy( $image, $width, $height, ($width - $dstWidth) / 2, ($height - $dstHeight) / 2, 0, 0, $dstWidth, $dstHeight, imagesx($image), imagesy($image), $background, ); } /* * @inheritdoc / public static function doRotate($image, $angle, $background = 'transparent') { $rotated = imagerotate($image, $angle, static::parseColor($background)); imagedestroy($image); return $rotated; } /* * Creates an image resource. * * @param int $width * @param int $height * @param mixed $color * * @return false\|resource / protected static function createImage($width, $height, $color = 'transparent') { $rgba = static::parseColor($color); $image = imagecreatetruecolor($width, $height); imagefill($image, 0, 0, $rgba); if ($color == 'transparent') { imagecolortransparent($image, $rgba); } return $image; } /* * Normalizes an image to be true color and transparent color. * * @param resource $image * * @return false\|resource / protected static function normalizeImage($image) { if (imageistruecolor($image) && imagecolortransparent($image) == -1) { return $image; } $width = imagesx($image); $height = imagesy($image); $canvas = static::createImage($width, $height); imagecopy($canvas, $image, 0, 0, 0, 0, $width, $height); imagedestroy($image); return $canvas; } /* * Embeds an image IPTC data. * * @param array $iptc * @param string $file * * @return string */ protected static function embedIptc(array $iptc, $file) { $iptcdata = ''; foreach ($iptc as $tag => $value) { $tag = explode('#', $tag, 2); $value = join(' ', (array) $value); $length = strlen($value); $iptcdata .= chr(0x1c) . chr((int) $tag[0]) . chr((int) $tag[1]); if ($length < 0x8000) { $iptcdata .= chr($length >> 8) . chr($length & 0xff); } else { $iptcdata .= chr(0x80) . chr(0x04) . chr(($length >> 24) & 0xff) . chr(($length >> 16) & 0xff) . chr(($length >> 8) & 0xff) . chr($length & 0xff); } $iptcdata .= $value; } return iptcembed($iptcdata, $file); } }

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