/** * Get an image from a file or url, return it resized if the image exceeds the $maxImageWidth or $maxImageHeight directives. * * The return value is an array. * ['width'] is the width of the image. * ['height'] is the height of the image. * ['mime'] is the mime type of the image. Resized images are always in jpeg format. * ['image'] is the image data. * ['ext'] is the extension of the image file. * * @param EPub $book * @param string $imageSource path or url to file. * * @return array|bool * @throws \Exception */ public static function getImage($book, $imageSource) { $width = -1; $height = -1; $mime = "application/octet-stream"; $ext = ""; $image = FileHelper::getFileContents($imageSource); $ratio = 1; if ($image !== false && strlen($image) > 0) { if (BinStringStatic::startsWith(trim($image), '<svg') || (BinStringStatic::startsWith(trim($image), '<?xml') || strpos($image, '<svg') > 0)) { // SVG image. $xml = simplexml_load_string($image); $attr = $xml->attributes(); $meta = ImageHelper::handleSVGAttribs($xml); $mime = "image/svg+xml"; $ext = "svg"; $width = $meta['width']; $height = $meta['height']; $ratio = ImageHelper::getImageScale($width, $height, $book->maxImageWidth, $book->maxImageHeight); if ($ratio < 1) { $attr->width = $width * $ratio; $attr->height = $height * $ratio; } $image = $xml->asXML(); } else { $imageFile = imagecreatefromstring($image); if ($imageFile !== false) { $width = ImageSX($imageFile); $height = ImageSY($imageFile); } if (self::isGdInstalled()) { @($type = exif_imagetype($imageSource)); $mime = image_type_to_mime_type($type); } if ($mime === "application/octet-stream") { $mime = ImageHelper::getImageFileTypeFromBinary($image); } if ($mime === "application/octet-stream") { $mime = MimeHelper::getMimeTypeFromUrl($imageSource); } } } else { return false; } if ($width <= 0 || $height <= 0) { return false; } if ($mime !== "image/svg+xml" && self::isGdInstalled()) { $ratio = ImageHelper::getImageScale($width, $height, $book->maxImageWidth, $book->maxImageHeight); if ($ratio < 1 || empty($mime)) { if ($mime == "image/png" || $book->isGifImagesEnabled === false && $mime == "image/gif") { $image_o = imagecreatefromstring($image); $image_p = imagecreatetruecolor($width * $ratio, $height * $ratio); imagealphablending($image_p, false); imagesavealpha($image_p, true); imagealphablending($image_o, true); imagecopyresampled($image_p, $image_o, 0, 0, 0, 0, $width * $ratio, $height * $ratio, $width, $height); ob_start(); imagepng($image_p, null, 9); $image = ob_get_contents(); ob_end_clean(); imagedestroy($image_o); imagedestroy($image_p); $ext = "png"; } else { if ($book->isGifImagesEnabled !== false && $mime == "image/gif") { $tFileD = tempnam("BewareOfGeeksBearingGifs", "grD"); ResizeGif::ResizeByRatio($imageSource, $tFileD, $ratio); $image = file_get_contents($tFileD); unlink($tFileD); } else { $image_o = imagecreatefromstring($image); $image_p = imagecreatetruecolor($width * $ratio, $height * $ratio); imagecopyresampled($image_p, $image_o, 0, 0, 0, 0, $width * $ratio, $height * $ratio, $width, $height); ob_start(); imagejpeg($image_p, null, 80); $image = ob_get_contents(); ob_end_clean(); imagedestroy($image_o); imagedestroy($image_p); $mime = "image/jpeg"; $ext = "jpg"; } } } } if ($ext === "") { static $mimeToExt = array('image/jpeg' => 'jpg', 'image/gif' => 'gif', 'image/png' => 'png', 'image/svg+xml' => "svg"); if (isset($mimeToExt[$mime])) { $ext = $mimeToExt[$mime]; } } $rv = array(); $rv['width'] = $width * $ratio; $rv['height'] = $height * $ratio; $rv['mime'] = $mime; $rv['image'] = $image; $rv['ext'] = $ext; return $rv; }