/**
* 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;
}
/**
* Add a cover image to the book.
* If the $imageData is not set, the function assumes the $fileName is the path to the image file.
*
* The styling and structure of the generated XHTML is heavily inspired by the XHTML generated by Calibre.
*
* @param string $fileName Filename to use for the image, must be unique for the book.
* @param string $imageData Binary image data
* @param string $mimetype Image mimetype, such as "image/jpeg" or "image/png".
*
* @return bool $success
*/
function setCoverImage($fileName, $imageData = null, $mimetype = null)
{
if ($this->isFinalized || $this->isCoverImageSet || array_key_exists("CoverPage.xhtml", $this->fileList)) {
return false;
}
if ($imageData == null) {
// assume $fileName is the valid file path.
if (!file_exists($fileName)) {
// Attempt to locate the file using the doc root.
$rp = realpath($this->docRoot . "/" . $fileName);
if ($rp !== false) {
// only assign the docroot path if it actually exists there.
$fileName = $rp;
}
}
$image = ImageHelper::getImage($this, $fileName);
$imageData = $image['image'];
$mimetype = $image['mime'];
$fileName = preg_replace('#\\.[^\\.]+$#', "." . $image['ext'], $fileName);
}
$path = pathinfo($fileName);
$imgPath = "images/" . $path["basename"];
if (empty($mimetype) && file_exists($fileName)) {
/** @noinspection PhpUnusedLocalVariableInspection */
list($width, $height, $type, $attr) = getimagesize($fileName);
$mimetype = image_type_to_mime_type($type);
}
if (empty($mimetype)) {
$ext = strtolower($path['extension']);
if ($ext == "jpg") {
$ext = "jpeg";
}
$mimetype = "image/" . $ext;
}
if ($this->isEPubVersion2()) {
$coverPage = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" . "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\"\n" . " \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\n" . "<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:epub=\"http://www.idpf.org/2007/ops\" xml:lang=\"en\">\n" . "\t<head>\n" . "\t\t<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"/>\n" . $this->getViewportMetaLine() . "\t\t<title>Cover Image</title>\n" . "\t\t<link type=\"text/css\" rel=\"stylesheet\" href=\"Styles/CoverPage.css\" />\n" . "\t</head>\n" . "\t<body>\n" . "\t\t<div>\n" . "\t\t\t<img src=\"" . $imgPath . "\" alt=\"Cover image\" style=\"height: 100%\"/>\n" . "\t\t</div>\n" . "\t</body>\n" . "</html>\n";
} else {
$coverPage = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" . "<html xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:epub=\"http://www.idpf.org/2007/ops\">\n" . "\t<head>\n" . "\t\t<meta http-equiv=\"Default-Style\" content=\"text/html; charset=utf-8\" />\n" . $this->getViewportMetaLine() . "\t\t<title>Cover Image</title>\n" . "\t\t<link type=\"text/css\" rel=\"stylesheet\" href=\"Styles/CoverPage.css\" />\n" . "\t</head>\n" . "\t<body>\n" . "\t\t<section epub:type=\"cover\">\n" . "\t\t\t<img src=\"" . $imgPath . "\" alt=\"Cover image\" style=\"height: 100%\"/>\n" . "\t\t</section>\n" . "\t</body>\n" . "</html>\n";
}
$coverPageCss = "@page, body, div, img {\n" . "\tpadding: 0pt;\n" . "\tmargin:0pt;\n" . "}\n\nbody {\n" . "\ttext-align: center;\n" . "}\n";
$this->addCSSFile("Styles/CoverPage.css", "CoverPageCss", $coverPageCss);
$this->addFile($imgPath, "CoverImage", $imageData, $mimetype);
$this->addReferencePage("CoverPage", "CoverPage.xhtml", $coverPage, "cover");
$this->isCoverImageSet = true;
return true;
}
