/**
* Resolve a media src and determine it's target location and add it to the book.
*
* @param string $source Source link.
* @param string $internalPath (referenced) Return value, will be set to the target path and name in the book.
* @param string $internalSrc (referenced) Return value, will be set to the target name in the book.
* @param string $isSourceExternal (referenced) Return value, will be set to TRUE if the image originated from a full URL.
* @param string $baseDir Default is "", meaning it is pointing to the document root.
* @param string $htmlDir The path to the parent HTML file's directory from the root of the archive.
*
* @return bool
*/
protected function resolveMedia($source, &$internalPath, &$internalSrc, &$isSourceExternal, $baseDir = "", $htmlDir = "")
{
if ($this->isFinalized) {
return false;
}
$mediaPath = null;
$tmpFile = null;
if (preg_match('#^(http|ftp)s?://#i', $source) == 1) {
$urlInfo = parse_url($source);
if (strpos($urlInfo['path'], $baseDir . "/") !== false) {
$internalSrc = substr($urlInfo['path'], strpos($urlInfo['path'], $baseDir . "/") + strlen($baseDir) + 1);
}
$internalPath = $urlInfo["scheme"] . "/" . $urlInfo["host"] . "/" . pathinfo($urlInfo["path"], PATHINFO_DIRNAME);
$isSourceExternal = true;
$mediaPath = FileHelper::getFileContents($source, true);
$tmpFile = $mediaPath;
} else {
if (strpos($source, "/") === 0) {
$internalPath = pathinfo($source, PATHINFO_DIRNAME);
$mediaPath = $source;
if (!file_exists($mediaPath)) {
$mediaPath = $this->docRoot . $mediaPath;
}
} else {
$internalPath = $htmlDir . "/" . preg_replace('#^[/\\.]+#', '', pathinfo($source, PATHINFO_DIRNAME));
$mediaPath = $baseDir . "/" . $source;
if (!file_exists($mediaPath)) {
$mediaPath = $this->docRoot . $mediaPath;
}
}
}
if ($mediaPath !== false) {
$mime = MimeHelper::getMimeTypeFromExtension(pathinfo($source, PATHINFO_EXTENSION));
$internalPath = RelativePath::getRelativePath("media/" . $internalPath . "/" . $internalSrc);
if (!array_key_exists($internalPath, $this->fileList) && $this->addLargeFile($internalPath, "m_" . $internalSrc, $mediaPath, $mime)) {
$this->fileList[$internalPath] = $source;
}
if (isset($tmpFile)) {
unlink($tmpFile);
}
return true;
}
return false;
}
/**
* 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;
}
/**
* Try to determine the mimetype of the file path.
*
* @param string $source Path
*
* @return string mimetype, or FALSE.
* @deprecated Use getMimeTypeFromExtension(string $extension) instead.
*/
public static function getMime($source)
{
return MimeHelper::getMimeTypeFromExtension(pathinfo($source, PATHINFO_EXTENSION));
}