function generate_transform_preview($ref){
global $storagedir;
global $imagemagick_path;
global $imversion;
if (!isset($imversion)){
$imversion = get_imagemagick_version();
}
$tmpdir = get_temp_dir();
// get imagemagick path
$command = get_utility_path("im-convert");
if ($command==false) {exit("Could not find ImageMagick 'convert' utility.");}
$orig_ext = sql_value("select file_extension value from resource where ref = '$ref'",'');
$originalpath= get_resource_path($ref,true,'',false,$orig_ext);
# Since this check is in get_temp_dir() omit: if(!is_dir($storagedir."/tmp")){mkdir($storagedir."/tmp",0777);}
if(!is_dir(get_temp_dir() . "/transform_plugin")){mkdir(get_temp_dir() . "/transform_plugin",0777);}
if ($imversion[0]<6 || ($imversion[0] == 6 && $imversion[1]<7) || ($imversion[0] == 6 && $imversion[1] == 7 && $imversion[2]<5)){
$colorspace1 = " -colorspace sRGB ";
$colorspace2 = " -colorspace RGB ";
} else {
$colorspace1 = " -colorspace RGB ";
$colorspace2 = " -colorspace sRGB ";
}
$command .= " \"$originalpath\" +matte -delete 1--1 -flatten $colorspace1 -geometry 450 $colorspace2 \"$tmpdir/transform_plugin/pre_$ref.jpg\"";
run_command($command);
// while we're here, clean up any old files still hanging around
$dp = opendir(get_temp_dir() . "/transform_plugin");
while ($file = readdir($dp)) {
if ($file <> '.' && $file <> '..'){
if ((filemtime(get_temp_dir() . "/transform_plugin/$file")) < (strtotime('-2 days'))) {
unlink(get_temp_dir() . "/transform_plugin/$file");
}
}
}
closedir($dp);
return true;
}
function generate_transform_preview($ref)
{
global $storagedir;
global $imagemagick_path;
global $imversion;
if (!isset($imversion)) {
$imversion = get_imagemagick_version();
}
$tmpdir = get_temp_dir();
// get imagemagick path
$command = get_utility_path("im-convert");
if ($command == false) {
exit("Could not find ImageMagick 'convert' utility.");
}
$orig_ext = sql_value("select file_extension value from resource where ref = '{$ref}'", '');
$transformsourcepath = get_resource_path($ref, true, 'scr', false, 'jpg');
//use screen size if available to save time
if (!file_exists($transformsourcepath)) {
$transformsourcepath = get_resource_path($ref, true, '', false, $orig_ext);
}
# Since this check is in get_temp_dir() omit: if(!is_dir($storagedir."/tmp")){mkdir($storagedir."/tmp",0777);}
if (!is_dir(get_temp_dir() . "/transform_plugin")) {
mkdir(get_temp_dir() . "/transform_plugin", 0777);
}
if ($imversion[0] < 6 || $imversion[0] == 6 && $imversion[1] < 7 || $imversion[0] == 6 && $imversion[1] == 7 && $imversion[2] < 5) {
$colorspace1 = " -colorspace sRGB ";
$colorspace2 = " -colorspace RGB ";
} else {
$colorspace1 = " -colorspace RGB ";
$colorspace2 = " -colorspace sRGB ";
}
$command .= " \"{$transformsourcepath}\"[0] +matte -flatten {$colorspace1} -geometry 450 {$colorspace2} \"{$tmpdir}/transform_plugin/pre_{$ref}.jpg\"";
run_command($command);
// while we're here, clean up any old files still hanging around
$dp = opendir(get_temp_dir() . "/transform_plugin");
while ($file = readdir($dp)) {
if ($file != '.' && $file != '..') {
if (filemtime(get_temp_dir() . "/transform_plugin/{$file}") < strtotime('-2 days')) {
unlink(get_temp_dir() . "/transform_plugin/{$file}");
}
}
}
closedir($dp);
return true;
}
// are they requesting to change the original?
if (isset($_REQUEST['mode']) && strtolower($_REQUEST['mode']) == 'original') {
$original = true;
} else {
$original = false;
}
// if they can't download this resource, they shouldn't be doing this
// also, if they are trying to modify the original but don't have edit access
// they should never get these errors, because the links shouldn't show up if no perms
if ($access != 0 || $original && !$edit_access) {
include "../../../include/header.php";
echo "Permission denied.";
include "../../../include/footer.php";
exit;
}
$imversion = get_imagemagick_version();
// generate a preview image for the operation if it doesn't already exist
if (!file_exists(get_temp_dir() . "/transform_plugin/pre_{$ref}.jpg")) {
//echo "generating preview";
//exit();
generate_transform_preview($ref) or die("Error generating transform preview.");
}
# Locate imagemagick.
if (!isset($imagemagick_path)) {
echo "Error: ImageMagick must be configured for crop functionality. Please contact your system administrator.";
exit;
}
$command = get_utility_path("im-convert");
if ($command == false) {
exit("Could not find ImageMagick 'convert' utility.");
}
function create_previews($ref, $thumbonly = false, $extension = "jpg", $previewonly = false, $previewbased = false, $alternative = -1, $ignoremaxsize = false, $ingested = false)
{
global $keep_for_hpr, $imagemagick_path, $preview_generate_max_file_size, $autorotate_no_ingest;
// keep_for_hpr will be set to true if necessary in preview_preprocessing.php to indicate that an intermediate jpg can serve as the hpr.
// otherwise when the file extension is a jpg it's assumed no hpr is needed.
# Debug
debug("create_previews(ref={$ref},thumbonly={$thumbonly},extension={$extension},previewonly={$previewonly},previewbased={$previewbased},alternative={$alternative},ingested={$ingested})");
if (!$previewonly) {
// make sure the extension is the same as the original so checksums aren't done for previews
$o_ext = sql_value("select file_extension value from resource where ref={$ref}", "");
if ($extension == $o_ext) {
debug("create_previews - generate checksum for {$ref}");
generate_file_checksum($ref, $extension);
}
}
# first reset preview tweaks to 0
sql_query("update resource set preview_tweaks = '0|1' where ref = '{$ref}'");
// for compatibility with transform plugin, remove any
// transform previews for this resource when regenerating previews
$tpdir = get_temp_dir() . "/transform_plugin";
if (is_dir($tpdir) && file_exists("{$tpdir}/pre_{$ref}.jpg")) {
unlink("{$tpdir}/pre_{$ref}.jpg");
}
# pages/tools/update_previews.php?previewbased=true
# use previewbased to avoid touching original files (to preserve manually-uploaded preview images
# when regenerating previews (i.e. for watermarks)
if ($previewbased || $autorotate_no_ingest && !$ingested) {
$file = get_resource_path($ref, true, "lpr", false, "jpg", -1, 1, false, "", $alternative);
if (!file_exists($file)) {
$file = get_resource_path($ref, true, "scr", false, "jpg", -1, 1, false, "", $alternative);
if (!file_exists($file)) {
$file = get_resource_path($ref, true, "pre", false, "jpg", -1, 1, false, "", $alternative);
if (!file_exists($file) && $autorotate_no_ingest && !$ingested) {
$file = get_resource_path($ref, true, "", false, $extension, -1, 1, false, "", $alternative);
}
}
}
} else {
if (!$previewonly) {
$file = get_resource_path($ref, true, "", false, $extension, -1, 1, false, "", $alternative);
} else {
# We're generating based on a new preview (scr) image.
$file = get_resource_path($ref, true, "tmp", false, "jpg");
}
}
# Debug
debug("File source is {$file}");
# Make sure the file exists, if not update preview_attempts so that we don't keep trying to generate a preview
if (!file_exists($file)) {
sql_query("update resource set preview_attempts=ifnull(preview_attempts,0) + 1 where ref='{$ref}'");
return false;
}
# If configured, make sure the file is within the size limit for preview generation
if (isset($preview_generate_max_file_size) && !$ignoremaxsize) {
$filesize = filesize_unlimited($file) / (1024 * 1024);
# Get filesize in MB
if ($filesize > $preview_generate_max_file_size) {
return false;
}
}
# Locate imagemagick.
$convert_fullpath = get_utility_path("im-convert");
if ($convert_fullpath == false) {
debug("ERROR: Could not find ImageMagick 'convert' utility at location '{$imagemagick_path}'");
return false;
}
# Handle alternative image file generation.
global $image_alternatives;
if (isset($image_alternatives) && $alternative == -1) {
for ($n = 0; $n < count($image_alternatives); $n++) {
$exts = explode(",", $image_alternatives[$n]["source_extensions"]);
if (in_array($extension, $exts)) {
# Remove any existing alternative file(s) with this name.
$existing = sql_query("select ref from resource_alt_files where resource='{$ref}' and name='" . escape_check($image_alternatives[$n]["name"]) . "'");
for ($m = 0; $m < count($existing); $m++) {
delete_alternative_file($ref, $existing[$m]["ref"]);
}
# Create the alternative file.
$aref = add_alternative_file($ref, $image_alternatives[$n]["name"]);
$apath = get_resource_path($ref, true, "", true, $image_alternatives[$n]["target_extension"], -1, 1, false, "", $aref);
$source_profile = '';
if ($image_alternatives[$n]["icc"] === true) {
$iccpath = get_resource_path($ref, true, '', false, $extension) . '.icc';
global $icc_extraction;
global $ffmpeg_supported_extensions;
if (!file_exists($iccpath) && $extension != "pdf" && !in_array($extension, $ffmpeg_supported_extensions)) {
// extracted profile doesn't exist. Try extracting.
extract_icc_profile($ref, $extension);
}
if (file_exists($iccpath)) {
$source_profile = ' -strip -profile ' . $iccpath;
}
}
# Process the image
$version = get_imagemagick_version();
if ($version[0] > 5 || $version[0] == 5 && $version[1] > 5 || $version[0] == 5 && $version[1] == 5 && $version[2] > 7) {
// Use the new imagemagick command syntax (file then parameters)
$command = $convert_fullpath . ' ' . escapeshellarg($file) . ($extension == 'psd' ? '[0] +matte' : '') . $source_profile . ' ' . $image_alternatives[$n]['params'] . ' ' . escapeshellarg($apath);
} else {
// Use the old imagemagick command syntax (parameters then file)
$command = $convert_fullpath . $source_profile . " " . $image_alternatives[$n]["params"] . " " . escapeshellarg($file) . " " . escapeshellarg($apath);
}
$output = run_command($command);
if (file_exists($apath)) {
# Update the database with the new file details.
$file_size = filesize_unlimited($apath);
sql_query("update resource_alt_files set file_name='" . escape_check($image_alternatives[$n]["filename"] . "." . $image_alternatives[$n]["target_extension"]) . "',file_extension='" . escape_check($image_alternatives[$n]["target_extension"]) . "',file_size='" . $file_size . "',creation_date=now() where ref='{$aref}'");
}
}
}
}
if ($extension == "jpg" || $extension == "jpeg" || $extension == "png" || $extension == "gif") {
if (isset($imagemagick_path)) {
create_previews_using_im($ref, $thumbonly, $extension, $previewonly, $previewbased, $alternative, $ingested);
} else {
# ----------------------------------------
# Use the GD library to perform the resize
# ----------------------------------------
# For resource $ref, (re)create the various preview sizes listed in the table preview_sizes
# Only create previews where the target size IS LESS THAN OR EQUAL TO the source size.
# Set thumbonly=true to (re)generate thumbnails only.
$sizes = "";
if ($thumbonly) {
$sizes = " where id='thm' or id='col'";
}
if ($previewonly) {
$sizes = " where id='thm' or id='col' or id='pre' or id='scr'";
}
# fetch source image size, if we fail, exit this function (file not an image, or file not a valid jpg/png/gif).
if ((list($sw, $sh) = @getimagesize($file)) === false) {
return false;
}
$ps = sql_query("select * from preview_size {$sizes}");
for ($n = 0; $n < count($ps); $n++) {
# fetch target width and height
$tw = $ps[$n]["width"];
$th = $ps[$n]["height"];
$id = $ps[$n]["id"];
# Find the target path
$path = get_resource_path($ref, true, $ps[$n]["id"], false, "jpg", -1, 1, false, "", $alternative);
if (file_exists($path) && !$previewbased) {
unlink($path);
}
# Also try the watermarked version.
$wpath = get_resource_path($ref, true, $ps[$n]["id"], false, "jpg", -1, 1, true, "", $alternative);
if (file_exists($wpath)) {
unlink($wpath);
}
# only create previews where the target size IS LESS THAN OR EQUAL TO the source size.
# or when producing a small thumbnail (to make sure we have that as a minimum)
if ($sw > $tw || $sh > $th || $id == "thm" || $id == "col") {
# Calculate width and height.
if ($sw > $sh) {
$ratio = $tw / $sw;
} else {
$ratio = $th / $sh;
}
# Portrait
$tw = floor($sw * $ratio);
$th = floor($sh * $ratio);
# ----------------------------------------
# Use the GD library to perform the resize
# ----------------------------------------
$target = imagecreatetruecolor($tw, $th);
if ($extension == "png") {
$source = @imagecreatefrompng($file);
if ($source === false) {
return false;
}
} elseif ($extension == "gif") {
$source = @imagecreatefromgif($file);
if ($source === false) {
return false;
}
} else {
$source = @imagecreatefromjpeg($file);
if ($source === false) {
return false;
}
}
imagecopyresampled($target, $source, 0, 0, 0, 0, $tw, $th, $sw, $sh);
imagejpeg($target, $path, 90);
if ($ps[$n]["id"] == "thm") {
extract_mean_colour($target, $ref);
}
imagedestroy($target);
} elseif ($id == "pre" || $id == "thm" || $id == "col") {
# If the source is smaller than the pre/thm/col, we still need these sizes; just copy the file
copy($file, get_resource_path($ref, true, $id, false, $extension, -1, 1, false, "", $alternative));
if ($id == "thm") {
sql_query("update resource set thumb_width='{$sw}',thumb_height='{$sh}' where ref='{$ref}'");
}
}
}
# flag database so a thumbnail appears on the site
if ($alternative == -1) {
sql_query("update resource set has_image=1,preview_extension='jpg',preview_attempts=0,file_modified=now() where ref='{$ref}'");
}
}
} else {
# If using ImageMagick, call preview_preprocessing.php which makes use of ImageMagick and other tools
# to attempt to extract a preview.
global $no_preview_extensions;
if (isset($imagemagick_path) && !in_array(strtolower($extension), $no_preview_extensions)) {
include dirname(__FILE__) . "/preview_preprocessing.php";
}
}
return true;
}
