/**
* Return a Gravatar URL if one exists for the given user.
*
* @param string $email Email address of the user
* @param object $size Maximum size of the image
* @param boolean $notfound
*
* @returns string The URL of the image or FALSE if none was found
*/
function remote_avatar($email, $size, $notfound)
{
if (!get_config('remoteavatars')) {
return false;
}
require_once 'file.php';
$md5sum = md5(strtolower($email));
$s = 100;
$newsize = image_get_new_dimensions($s, $s, $size);
if ($newsize) {
$s = min($newsize['w'], $newsize['h']);
}
$baseurl = 'http://www.gravatar.com/avatar/';
if (get_config('remoteavatarbaseurl')) {
$baseurl = get_config('remoteavatarbaseurl');
}
return "{$baseurl}{$md5sum}.jpg?r=g&s={$s}&d=" . urlencode($notfound);
}
/**
* Return a Gravatar URL if one exists for the given user.
*
* @param string $email Email address of the user
* @param object $size Maximum size of the image
* @param boolean $notfound The value to return if the avatar is not found
*
* @returns string The URL of the image or $notfound if none was found
*/
function remote_avatar($email, $size, $notfound)
{
if (!get_config('remoteavatars')) {
return false;
}
require_once 'file.php';
$md5sum = md5(strtolower($email));
$s = 100;
$newsize = image_get_new_dimensions($s, $s, $size);
if ($newsize) {
$s = min($newsize['w'], $newsize['h']);
}
$baseurl = 'http://www.gravatar.com/avatar/';
if (is_https() === true) {
$baseurl = 'https://secure.gravatar.com/avatar/';
}
if (get_config('remoteavatarbaseurl')) {
$baseurl = get_config('remoteavatarbaseurl');
}
// Check if it is a valid avatar
$result = mahara_http_request(array(CURLOPT_URL => "{$baseurl}{$md5sum}.jpg?d=404", CURLOPT_HEADER => true, CURLOPT_NOBODY => true), true);
if (!$result || $result->error || $result->info['http_code'] == 404) {
return $notfound;
}
return "{$baseurl}{$md5sum}.jpg?r=g&s={$s}";
}
/**
* Given a path under dataroot, an ID and a size, return the path to a file
* matching all criteria.
*
* If the file with the ID exists but not of the correct size, this function
* will make a copy that is resized to the correct size.
*
* @param string $path The base path in dataroot where the image is stored. For
* example, 'artefact/file/profileicons/' for profile
* icons
* @param int $id The ID of the image to return. Is typically the ID of an
* artefact
* @param mixed $size The size the image should be.
*
* As a two element hash with 'w' and 'h' keys:
* - If 'w' and 'h' are not empty, the image will be
* exactly that size
* - If just 'w' is not empty, the image will be that wide,
* and the height will be set to make the image scale
* correctly
* - If just 'h' is not empty, the image will be that high,
* and the width will be set to make the image scale
* correctly
* - If neither are set or the parameter is not set, the
* image will not be resized
*
* As a number, the path returned will have the largest side being
* the length specified.
* @return string The path on disk where the appropriate file resides, or false
* if an appropriate file could not be located or generated
*/
function get_dataroot_image_path($path, $id, $size = null)
{
global $THEME;
$dataroot = get_config('dataroot');
$imagepath = $dataroot . $path;
if (substr($imagepath, -1) == '/') {
$imagepath = substr($imagepath, 0, -1);
}
if (!is_dir($imagepath) || !is_readable($imagepath)) {
return false;
}
// Work out the location of the original image
$originalimage = $imagepath . '/originals/' . $id % 256 . "/{$id}";
// If the original has been deleted, then don't show any image, even a cached one.
// delete_image only deletes the original, not any cached ones, so we have
// to make sure the original is still around
if (!is_readable($originalimage)) {
return false;
}
if (!$size) {
// No size has been asked for. Return the original
return $originalimage;
} else {
// Check if the image is available in the size requested
$sizestr = serialize($size);
$md5 = md5("{$id}.{$sizestr}");
$resizedimagedir = $imagepath . '/resized/';
check_dir_exists($resizedimagedir);
for ($i = 0; $i <= 2; $i++) {
$resizedimagedir .= substr($md5, $i, 1) . '/';
check_dir_exists($resizedimagedir);
}
$resizedimagefile = "{$resizedimagedir}{$md5}.{$id}";
//.$sizestr";
if (is_readable($resizedimagefile)) {
return $resizedimagefile;
}
// Image is not available in this size. If there is a base image for
// it, we can make one however.
if (is_readable($originalimage) && filesize($originalimage)) {
$imageinfo = getimagesize($originalimage);
$originalmimetype = $imageinfo['mime'];
// gd can eat a lot of memory shrinking large images, so use a placeholder image
// here if necessary
if (isset($imageinfo['bits'])) {
$bits = $imageinfo['bits'];
} else {
if ($imageinfo['mime'] == 'image/gif') {
$bits = 8;
}
}
if (isset($imageinfo[0]) && isset($imageinfo[1]) && !empty($bits)) {
$approxmem = $imageinfo[0] * $imageinfo[1] * ($bits / 8) * (isset($imageinfo['channels']) ? $imageinfo['channels'] : 3);
}
if (empty($approxmem) || $approxmem > get_config('maximageresizememory')) {
log_debug("Refusing to resize large image {$originalimage} {$originalmimetype} " . $imageinfo[0] . 'x' . $imageinfo[1] . ' ' . $imageinfo['bits'] . '-bit');
$originalimage = $THEME->get_path('images/no_thumbnail.png');
if (empty($originalimage) || !is_readable($originalimage)) {
return false;
}
$imageinfo = getimagesize($originalimage);
$originalmimetype = $imageinfo['mime'];
}
$format = 'png';
switch ($originalmimetype) {
case 'image/jpeg':
case 'image/jpg':
$format = 'jpeg';
$oldih = imagecreatefromjpeg($originalimage);
break;
case 'image/png':
$oldih = imagecreatefrompng($originalimage);
break;
case 'image/gif':
$format = 'gif';
$oldih = imagecreatefromgif($originalimage);
break;
case 'image/bmp':
case 'image/x-bmp':
case 'image/ms-bmp':
case 'image/x-ms-bmp':
if (!extension_loaded('imagick') || !class_exists('Imagick')) {
log_info('Bitmap image detected for resizing, but imagick extension is not available');
return false;
}
$ih = new Imagick($originalimage);
if (!($newdimensions = image_get_new_dimensions($ih->getImageWidth(), $ih->getImageHeight(), $size))) {
return false;
}
$ih->resizeImage($newdimensions['w'], $newdimensions['h'], imagick::FILTER_LANCZOS, 1);
if ($ih->writeImage($resizedimagefile)) {
return $resizedimagefile;
}
return false;
default:
return false;
}
if (!$oldih) {
return false;
}
$oldx = imagesx($oldih);
$oldy = imagesy($oldih);
if (!($newdimensions = image_get_new_dimensions($oldx, $oldy, $size))) {
return false;
}
$newih = imagecreatetruecolor($newdimensions['w'], $newdimensions['h']);
if ($originalmimetype == 'image/png' || $originalmimetype == 'image/gif') {
// Create a new destination image which is completely
// transparent and turn off alpha blending for it, so that when
// the PNG source file is copied, the alpha channel is retained.
// Thanks to http://alexle.net/archives/131
$background = imagecolorallocate($newih, 0, 0, 0);
imagecolortransparent($newih, $background);
imagealphablending($newih, false);
imagecopyresampled($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
imagesavealpha($newih, true);
} else {
// imagecopyresized is faster, but results in noticeably worse image quality.
// Given the images are resized only once each time they're
// made, I suggest you just leave the good quality one in place
imagecopyresampled($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
//imagecopyresized($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
}
$outputfunction = "image{$format}";
$result = $outputfunction($newih, $resizedimagefile);
if ($result) {
return $resizedimagefile;
}
}
// end attempting to build a resized image
}
// Image not available in any size
return false;
}
/**
* Return a Gravatar URL if one exists for the given user.
*
* @param string $email Email address of the user
* @param object $size Maximum size of the image
* @param boolean $notfound
*
* @returns string The URL of the image or FALSE if none was found
*/
function remote_avatar($email, $size, $notfound)
{
if (!get_config('remoteavatars')) {
return false;
}
require_once 'file.php';
$md5sum = md5(strtolower($email));
$s = 100;
$newsize = image_get_new_dimensions($s, $s, $size);
if ($newsize) {
$s = min($newsize['w'], $newsize['h']);
}
$baseurl = 'http://www.gravatar.com/avatar/';
if (is_https() === true) {
$baseurl = 'https://secure.gravatar.com/avatar/';
}
if (get_config('remoteavatarbaseurl')) {
$baseurl = get_config('remoteavatarbaseurl');
}
// Check if it is a valid avatar
$result = @get_headers("{$baseurl}{$md5sum}.jpg?d=404");
if (!$result || preg_match("#^HTTP/\\d+\\.\\d+ 404 #i", $result[0])) {
return $notfound;
}
return "{$baseurl}{$md5sum}.jpg?r=g&s={$s}";
}
/**
* Given a path under dataroot, an ID and a size, return the path to a file
* matching all criteria.
*
* If the file with the ID exists but not of the correct size, this function
* will make a copy that is resized to the correct size.
*
* @param string $path The base path in dataroot where the image is stored. For
* example, 'artefact/file/profileicons/' for profile
* icons
* @param int $id The ID of the image to return. Is typically the ID of an
* artefact
* @param mixed $size The size the image should be.
*
* As a two element hash with 'w' and 'h' keys:
* - If 'w' and 'h' are not empty, the image will be
* exactly that size
* - If just 'w' is not empty, the image will be that wide,
* and the height will be set to make the image scale
* correctly
* - If just 'h' is not empty, the image will be that high,
* and the width will be set to make the image scale
* correctly
* - If neither are set or the parameter is not set, the
* image will not be resized
*
* As a number, the path returned will have the largest side being
* the length specified.
* @return string The path on disk where the appropriate file resides, or false
* if an appropriate file could not be located or generated
*/
function get_dataroot_image_path($path, $id, $size = null)
{
$dataroot = get_config('dataroot');
$imagepath = $dataroot . $path;
if (substr($imagepath, -1) == '/') {
$imagepath = substr($imagepath, 0, -1);
}
if (!is_dir($imagepath) || !is_readable($imagepath)) {
return false;
}
// Work out the location of the original image
$originalimage = $imagepath . '/originals/' . $id % 256 . "/{$id}";
// If the original has been deleted, then don't show any image, even a cached one.
// delete_image only deletes the original, not any cached ones, so we have
// to make sure the original is still around
if (!is_readable($originalimage)) {
return false;
}
if (!$size) {
// No size has been asked for. Return the original
return $originalimage;
} else {
// Check if the image is available in the size requested
$sizestr = serialize($size);
$md5 = md5("{$id}.{$sizestr}");
$resizedimagedir = $imagepath . '/resized/';
check_dir_exists($resizedimagedir);
for ($i = 0; $i <= 2; $i++) {
$resizedimagedir .= substr($md5, $i, 1) . '/';
check_dir_exists($resizedimagedir);
}
$resizedimagefile = "{$resizedimagedir}{$md5}.{$id}";
//.$sizestr";
if (is_readable($resizedimagefile)) {
return $resizedimagefile;
}
// Image is not available in this size. If there is a base image for
// it, we can make one however.
if (is_readable($originalimage)) {
$imageinfo = getimagesize($originalimage);
$originalmimetype = $imageinfo['mime'];
switch ($originalmimetype) {
case 'image/jpeg':
case 'image/jpg':
$oldih = imagecreatefromjpeg($originalimage);
break;
case 'image/png':
$oldih = imagecreatefrompng($originalimage);
break;
case 'image/gif':
$oldih = imagecreatefromgif($originalimage);
break;
case 'image/bmp':
case 'image/x-bmp':
case 'image/ms-bmp':
case 'image/x-ms-bmp':
if (!extension_loaded('imagick')) {
log_info('Bitmap image detected for resizing, but imagick extension is not available');
return false;
}
$ih = imagick_readimage($originalimage);
if (!($newdimensions = image_get_new_dimensions(imagick_getwidth($ih), imagick_getheight($ih), $size))) {
return false;
}
imagick_resize($ih, $newdimensions['w'], $newdimensions['h'], IMAGICK_FILTER_LANCZOS, 1);
if (imagick_writeimage($ih, $resizedimagefile)) {
return $resizedimagefile;
}
return false;
default:
return false;
}
if (!$oldih) {
return false;
}
$oldx = imagesx($oldih);
$oldy = imagesy($oldih);
if (!($newdimensions = image_get_new_dimensions($oldx, $oldy, $size))) {
return false;
}
$newih = imagecreatetruecolor($newdimensions['w'], $newdimensions['h']);
if ($originalmimetype == 'image/png' || $originalmimetype == 'image/gif') {
// Create a new destination image which is completely
// transparent and turn off alpha blending for it, so that when
// the PNG source file is copied, the alpha channel is retained.
// Thanks to http://alexle.net/archives/131
$background = imagecolorallocate($newih, 0, 0, 0);
imagecolortransparent($newih, $background);
imagealphablending($newih, false);
imagecopyresampled($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
imagesavealpha($newih, true);
} else {
// imagecopyresized is faster, but results in noticeably worse image quality.
// Given the images are resized only once each time they're
// made, I suggest you just leave the good quality one in place
imagecopyresampled($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
//imagecopyresized($newih, $oldih, 0, 0, 0, 0, $newdimensions['w'], $newdimensions['h'], $oldx, $oldy);
}
$result = imagepng($newih, $resizedimagefile);
if ($result) {
return $resizedimagefile;
}
}
// end attempting to build a resized image
}
// Image not available in any size
return false;
}
