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if pdf-thumbnail-creation is not available, generate a single scaled-down pdf-icon and backported other thumbnail stuff from trunk

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This commit is contained in:
Ralf Becker 2015-08-27 09:32:06 +00:00
parent 5df88334bc
commit e93962c85e
1 changed files with 140 additions and 12 deletions
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152
etemplate/thumbnail.php
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@ -135,6 +135,17 @@ function read_thumbnail($src)
// Generate the destination filename and check whether the destination directory
// had been successfully created (the cache class used in gen_dstfile does that).
$stat = egw_vfs::stat(egw_vfs::parse_url($src, PHP_URL_PATH));
// if pdf-thumbnail-creation is not available, generate a single scaled-down pdf-icon
if ($stat && egw_vfs::mime_content_type($src) == 'application/pdf' && !pdf_thumbnails_available())
{
list($app, $icon) = explode('/', egw_vfs::mime_icon('application/pdf'), 2);
list(, $path) = explode($GLOBALS['egw_info']['server']['webserver_url'],
common::image($app, $icon), 2);
$src = EGW_SERVER_ROOT.$path;
$stat = false;
$maxsize = $height = $width = $minsize = $maxh = $minh = $maxw = $minw = 16;
}
$dst = gen_dstfile($stat && !empty($stat['url']) ? $stat['url'] : $src, $maxsize, $height, $width, $minsize);
$dst_dir = dirname($dst);
if(file_exists($dst_dir))
@ -176,8 +187,8 @@ function read_thumbnail($src)
if ($dst)
{
// Allow client to cache these, makes scrolling in filemanager much nicer
header('Pragma: private');
header('Cache-Control: max-age=300');
// setting maximum allow caching time of one year, if url contains (non-empty) moditication time
egw_session::cache_control(empty($_GET['mtime']) ? 300 : 31536000, true); // true = private / browser only caching
header('Content-Type: '.$output_mime);
readfile($dst);
return true;
@ -225,7 +236,7 @@ function gen_dstfile($src, $maxsize, $height=null, $width=null, $minsize=null)
* TODO: As this is a general purpose function, it might probably be moved
* to some other php file or an "image utils" class.
*/
function get_scaled_image_size($w, $h, $maxw, $maxh, $minw, $minh)
function get_scaled_image_size($w, $h, $maxw, $maxh, $minw=0, $minh=0)
{
//Scale will contain the factor by which the image has to be scaled down
$scale = 1.0;
@ -282,12 +293,16 @@ function exif_thumbnail_load($file)
* otherwise the gd-image is returned.
*
* @param string $file the file which to load
* @param int $maxw the maximum width of the thumbnail
* @param int $maxh the maximum height of the thumbnail
* @returns boolean|resource false or a gd_image
*/
function gd_image_load($file)
function gd_image_load($file,$maxw,$maxh)
{
// Get mime type
list($type, $image_type) = explode('/', egw_vfs::mime_content_type($file));
// if $file is not from vfs, use mime_magic::filename2mime to get mime-type from extension
if (!$type) list($type, $image_type) = explode('/', mime_magic::filename2mime($file));
// Call the according gd constructor depending on the file type
if($type == 'image')
@ -308,12 +323,44 @@ function gd_image_load($file)
return imagecreatefromwbmp($file);
}
}
else if ($type == 'application' && strpos($image_type,'vnd.oasis.opendocument.') === 0)
else if ($type == 'application')
{
// OpenDocuments have thumbnails inside already
return get_opendocument_thumbnail($file);
}
$thumb = false;
if(strpos($image_type,'vnd.oasis.opendocument.') === 0)
{
// OpenDocuments have thumbnails inside already
$thumb = get_opendocument_thumbnail($file);
}
else if($image_type == 'pdf')
{
$thumb = get_pdf_thumbnail($file);
}
else if (strpos($image_type, 'vnd.openxmlformats-officedocument.') === 0)
{
// TODO: Figure out how this can be done reliably
//$thumb = get_msoffice_thumbnail($file);
}
// Mark it with mime type icon
if($thumb)
{
// Need to scale first, or the mark will be wrong size
$scaled = get_scaled_image_size(imagesx($thumb), imagesy($thumb), $maxw, $maxh);
if ($scaled !== false)
{
list($sw, $sh) = $scaled;
//Now scale it down
$img_dst = gd_create_transparent_image($sw, $sh);
imagecopyresampled($img_dst, $thumb, 0, 0, 0, 0, $sw, $sh, imagesx($thumb), imagesy($thumb));
$thumb = $img_dst;
}
$mime = egw_vfs::mime_content_type($file);
$tag_image = null;
corner_tag($thumb, $tag_image, $mime);
imagedestroy($tag_image);
}
return $thumb;
}
return false;
}
@ -330,7 +377,7 @@ function gd_image_load($file)
*/
function get_opendocument_thumbnail($file)
{
list(, $file_type) = $mimetype = explode('/', egw_vfs::mime_content_type($file));
$mimetype = explode('/', egw_vfs::mime_content_type($file));
// Image is already there, but we can't access them directly through VFS
$ext = $mimetype == 'application/vnd.oasis.opendocument.text' ? '.odt' : '.ods';
@ -340,13 +387,13 @@ function get_opendocument_thumbnail($file)
$thumbnail_url = 'zip://'.$archive.'#Thumbnails/thumbnail.png';
$image = imagecreatefromstring(file_get_contents($thumbnail_url));
unlink($archive);
/*
// Mask it with a color by type
$mask = imagecreatefrompng('templates/default/images/opendocument.png');
if($image)
{
$filter_color = array(0,0,0);
switch($file_type)
switch($mimetype[1])
{
// Type colors from LibreOffice (https://wiki.documentfoundation.org/Design/Whiteboards/LibreOffice_Initial_Icons)
case 'vnd.oasis.opendocument.text':
@ -363,9 +410,90 @@ function get_opendocument_thumbnail($file)
imagefilter($mask, IMG_FILTER_COLORIZE, $filter_color[0],$filter_color[1],$filter_color[2] );
imagecopyresampled($image, $mask,0,0,0,0,imagesx($image),imagesy($image),imagesx($mask),imagesy($mask));
}
*
*/
return $image;
}
/**
* Check if we have the necessary requirements to generate pdf thumbnails
*
* @return boolean
*/
function pdf_thumbnails_available()
{
return class_exists('Imagick');
}
/**
* Extract the thumbnail from a PDF file and apply a colored mask
* so you can tell what type it is, and so it looks a little better in larger
* thumbnails (eg: in tiled view).
*
* Requires ImageMagick & ghostscript.
*
* @param string $file
* @return resource GD image
*/
function get_pdf_thumbnail($file)
{
if(!pdf_thumbnails_available()) return false;
// switch off max_excution_time, as some thumbnails take longer and
// will be startet over and over again, if they dont finish
@set_time_limit(0);
$im = new Imagick($file);
$im->setimageformat('png');
$im->setresolution(300, 300);
$gd = imagecreatefromstring($im->getimageblob());
return $gd;
}
/**
* Put the tag image in the corner of the target image
*
* Used for thumbnails of documents, so you can still see the mime type
*
* @param resource& $target_image
* @param resource&|null $tag_image
* @param string|null $mime Use correct mime type icon instead of $tag_image
*/
function corner_tag(&$target_image, &$tag_image, $mime)
{
$target_width = imagesx($target_image);
$target_height = imagesy($target_image);
// Find mime image, if no tag image set
if(!$tag_image && $mime)
{
list($app, $icon) = explode('/', egw_vfs::mime_icon($mime), 2);
list(, $path) = explode($GLOBALS['egw_info']['server']['webserver_url'],
common::image($app, $icon), 2);
$dst = EGW_SERVER_ROOT.$path;
$tag_image = imagecreatefrompng($dst);
}
// Find correct size - max 1/3 target
$tag_size = get_scaled_image_size(imagesx($tag_image), imagesy($tag_image), $target_width / 3, $target_height / 3);
if(!$tag_size) return;
list($tag_width,$tag_height) = $tag_size;
// Put it in
if($mime)
{
imagecopyresampled($target_image,$tag_image,
$target_width - $tag_width,
$target_height - $tag_height,
0,0,
$tag_width,
$tag_height,
imagesx($tag_image),
imagesy($tag_image)
);
}
}
/**
* Create an gd_image with transparent background.
*
@ -411,7 +539,7 @@ function gd_create_transparent_image($w, $h)
function gd_image_thumbnail($file, $maxw, $maxh, $minw, $minh)
{
//Load the image
if (($img_src = gd_image_load($file)) !== false)
if (($img_src = gd_image_load($file,$maxw,$maxh)) !== false)
{
//Get the constraints of the image
$w = imagesx($img_src);