/**
* Given a user id this function scales and crops the user images to remove
* the one pixel black border.
*
* @global object
* @param int $id
* @param string $dir
* @return boolean
*/
function upgrade_profile_image($id, $dir = 'users')
{
global $CFG, $OUTPUT;
$im = ImageCreateFromJPEG($CFG->dataroot . '/' . $dir . '/' . $id . '/f1.jpg');
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor(100, 100);
$im2 = ImageCreateTrueColor(35, 35);
} else {
$im1 = ImageCreate(100, 100);
$im2 = ImageCreate(35, 35);
}
if (function_exists('ImageCopyResampled') and $CFG->gdversion >= 2) {
ImageCopyBicubic($im1, $im, 0, 0, 2, 2, 100, 100, 96, 96);
} else {
imagecopy($im1, $im, 0, 0, 0, 0, 100, 100);
$c = ImageColorsForIndex($im1, ImageColorAt($im1, 2, 2));
$color = ImageColorClosest($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel($im1, 0, 0, $color);
$c = ImageColorsForIndex($im1, ImageColorAt($im1, 2, 97));
$color = ImageColorClosest($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel($im1, 0, 99, $color);
$c = ImageColorsForIndex($im1, ImageColorAt($im1, 97, 2));
$color = ImageColorClosest($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel($im1, 99, 0, $color);
$c = ImageColorsForIndex($im1, ImageColorAt($im1, 97, 97));
$color = ImageColorClosest($im1, $c['red'], $c['green'], $c['blue']);
ImageSetPixel($im1, 99, 99, $color);
for ($x = 1; $x < 99; $x++) {
$c1 = ImageColorsForIndex($im1, ImageColorAt($im, $x, 1));
$color = ImageColorClosest($im, $c1['red'], $c1['green'], $c1['blue']);
ImageSetPixel($im1, $x, 0, $color);
$c2 = ImageColorsForIndex($im1, ImageColorAt($im1, $x, 98));
$color = ImageColorClosest($im, $c2['red'], $c2['green'], $c2['blue']);
ImageSetPixel($im1, $x, 99, $color);
}
for ($y = 1; $y < 99; $y++) {
$c3 = ImageColorsForIndex($im1, ImageColorAt($im, 1, $y));
$color = ImageColorClosest($im, $c3['red'], $c3['green'], $c3['blue']);
ImageSetPixel($im1, 0, $y, $color);
$c4 = ImageColorsForIndex($im1, ImageColorAt($im1, 98, $y));
$color = ImageColorClosest($im, $c4['red'], $c4['green'], $c4['blue']);
ImageSetPixel($im1, 99, $y, $color);
}
}
ImageCopyBicubic($im2, $im, 0, 0, 2, 2, 35, 35, 96, 96);
if (function_exists('ImageJpeg')) {
if (ImageJpeg($im1, $CFG->dataroot . '/' . $dir . '/' . $id . '/f1.jpg', 90) and ImageJpeg($im2, $CFG->dataroot . '/' . $dir . '/' . $id . '/f2.jpg', 95)) {
@chmod($CFG->dataroot . '/' . $dir . '/' . $id . '/f1.jpg', 0666);
@chmod($CFG->dataroot . '/' . $dir . '/' . $id . '/f2.jpg', 0666);
return 1;
}
} else {
echo $OUTPUT->notification('PHP has not been configured to support JPEG images. Please correct this.');
}
return 0;
}
function lightboxgallery_resize_image($image, $infoobj, $width, $height, $offsetx = 0, $offsety = 0)
{
global $CFG;
$resized = lightboxgallery_image_create($width, $height);
$oldwidth = $infoobj->imagesize[0];
$oldheight = $infoobj->imagesize[1];
$cx = $oldwidth / 2;
$cy = $oldheight / 2;
$ratiow = $width / $oldwidth;
$ratioh = $height / $oldheight;
if ($ratiow < $ratioh) {
$srcw = floor($width / $ratioh);
$srch = $oldheight;
$srcx = floor($cx - $srcw / 2) + $offsetx;
$srcy = $offsety;
} else {
$srcw = $oldwidth;
$srch = floor($height / $ratiow);
$srcx = $offsetx;
$srcy = floor($cy - $srch / 2) + $offsety;
}
ImageCopyBicubic($resized, $image, 0, 0, $srcx, $srcy, $width, $height, $srcw, $srch);
return $resized;
}
/**
* (Re)generate thumbnail image according to the dimensions specified in the field settings.
* If thumbnail width and height are BOTH not specified then no thumbnail is generated, and
* additionally an attempted delete of the existing thumbnail takes place.
*/
function update_thumbnail($content)
{
global $CFG;
require_once $CFG->libdir . '/gdlib.php';
$datalocation = $CFG->dataroot . '/' . $this->data->course . '/' . $CFG->moddata . '/data/' . $this->data->id . '/' . $this->field->id . '/' . $content->recordid;
$originalfile = $datalocation . '/' . $content->content;
if (!file_exists($originalfile)) {
return;
}
if (!file_exists($datalocation . '/thumb')) {
mkdir($datalocation . '/thumb', 0777);
}
$thumbnaillocation = $datalocation . '/thumb/' . $content->content;
$imageinfo = GetImageSize($originalfile);
$image->width = $imageinfo[0];
$image->height = $imageinfo[1];
$image->type = $imageinfo[2];
if (!$image->width || !$image->height) {
// Should not happen
return;
}
switch ($image->type) {
case 1:
if (function_exists('ImageCreateFromGIF')) {
$im = ImageCreateFromGIF($originalfile);
} else {
return;
}
break;
case 2:
if (function_exists('ImageCreateFromJPEG')) {
$im = ImageCreateFromJPEG($originalfile);
} else {
return;
}
break;
case 3:
if (function_exists('ImageCreateFromPNG')) {
$im = ImageCreateFromPNG($originalfile);
} else {
return;
}
break;
}
// fix for MDL-7270
$thumbwidth = isset($this->field->param4) ? $this->field->param4 : '';
$thumbheight = isset($this->field->param5) ? $this->field->param5 : '';
if ($thumbwidth || $thumbheight) {
// Only if either width OR height specified do we want a thumbnail
$wcrop = $image->width;
$hcrop = $image->height;
if ($thumbwidth && !$thumbheight) {
$thumbheight = $image->height * $thumbwidth / $image->width;
} else {
if ($thumbheight && !$thumbwidth) {
$thumbwidth = $image->width * $thumbheight / $image->height;
} else {
// BOTH are set - may need to crop if aspect ratio differs
$hratio = $image->height / $thumbheight;
$wratio = $image->width / $thumbwidth;
if ($wratio > $hratio) {
// Crop the width
$wcrop = intval($thumbwidth * $hratio);
} elseif ($hratio > $wratio) {
// Crop the height
$hcrop = intval($thumbheight * $wratio);
}
}
}
// At this point both $thumbwidth and $thumbheight are set, and $wcrop and $hcrop
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor($thumbwidth, $thumbheight);
} else {
$im1 = ImageCreate($thumbwidth, $thumbheight);
}
// Prevent alpha blending for PNG images
if ($image->type == 3) {
imagealphablending($im1, false);
}
$cx = $image->width / 2;
$cy = $image->height / 2;
// These "half" measurements use the "crop" values rather than the actual dimensions
$halfwidth = floor($wcrop * 0.5);
$halfheight = floor($hcrop * 0.5);
ImageCopyBicubic($im1, $im, 0, 0, $cx - $halfwidth, $cy - $halfheight, $thumbwidth, $thumbheight, $halfwidth * 2, $halfheight * 2);
// Save alpha transparency for PNG images
if ($image->type == 3) {
imagesavealpha($im1, true);
}
if (function_exists('ImageJpeg') && $image->type != 3) {
@touch($thumbnaillocation);
// Helps in Safe mode
if (ImageJpeg($im1, $thumbnaillocation, 90)) {
@chmod($thumbnaillocation, 0666);
}
} elseif (function_exists('ImagePng') && $image->type == 3) {
@touch($thumbnaillocation);
// Helps in Safe mode
if (ImagePng($im1, $thumbnaillocation, 9)) {
@chmod($thumbnaillocation, 0666);
}
}
} else {
// Try and remove the thumbnail - we don't want thumbnailing active
@unlink($thumbnaillocation);
}
}
/**
* Stores optimised icon images in icon file area
*
* @param $context
* @param component
* @param $itemid
* @param $originalfile
* @return success
*/
function process_new_icon($context, $component, $filearea, $itemid, $originalfile)
{
global $CFG;
if (empty($CFG->gdversion)) {
return false;
}
if (!is_file($originalfile)) {
return false;
}
$imageinfo = GetImageSize($originalfile);
if (empty($imageinfo)) {
return false;
}
$image = new stdClass();
$image->width = $imageinfo[0];
$image->height = $imageinfo[1];
$image->type = $imageinfo[2];
switch ($image->type) {
case IMAGETYPE_GIF:
if (function_exists('ImageCreateFromGIF')) {
$im = ImageCreateFromGIF($originalfile);
} else {
debugging('GIF not supported on this server');
return false;
}
break;
case IMAGETYPE_JPEG:
if (function_exists('ImageCreateFromJPEG')) {
$im = ImageCreateFromJPEG($originalfile);
} else {
debugging('JPEG not supported on this server');
return false;
}
break;
case IMAGETYPE_PNG:
if (function_exists('ImageCreateFromPNG')) {
$im = ImageCreateFromPNG($originalfile);
} else {
debugging('PNG not supported on this server');
return false;
}
break;
default:
return false;
}
if (function_exists('ImagePng')) {
$imagefnc = 'ImagePng';
$imageext = '.png';
$filters = PNG_NO_FILTER;
$quality = 1;
} else {
if (function_exists('ImageJpeg')) {
$imagefnc = 'ImageJpeg';
$imageext = '.jpg';
$filters = null;
// not used
$quality = 90;
} else {
debugging('Jpeg and png not supported on this server, please fix server configuration');
return false;
}
}
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor(100, 100);
$im2 = ImageCreateTrueColor(35, 35);
if ($image->type == IMAGETYPE_PNG and $imagefnc === 'ImagePng') {
imagealphablending($im1, false);
$color = imagecolorallocatealpha($im1, 0, 0, 0, 127);
imagefill($im1, 0, 0, $color);
imagesavealpha($im1, true);
imagealphablending($im2, false);
$color = imagecolorallocatealpha($im2, 0, 0, 0, 127);
imagefill($im2, 0, 0, $color);
imagesavealpha($im2, true);
}
} else {
$im1 = ImageCreate(100, 100);
$im2 = ImageCreate(35, 35);
}
$cx = $image->width / 2;
$cy = $image->height / 2;
if ($image->width < $image->height) {
$half = floor($image->width / 2.0);
} else {
$half = floor($image->height / 2.0);
}
ImageCopyBicubic($im1, $im, 0, 0, $cx - $half, $cy - $half, 100, 100, $half * 2, $half * 2);
ImageCopyBicubic($im2, $im, 0, 0, $cx - $half, $cy - $half, 35, 35, $half * 2, $half * 2);
$fs = get_file_storage();
$icon = array('contextid' => $context->id, 'component' => $component, 'filearea' => $filearea, 'itemid' => $itemid, 'filepath' => '/');
ob_start();
if (!$imagefnc($im1, NULL, $quality, $filters)) {
// keep old icons
ob_end_clean();
return false;
}
$data = ob_get_clean();
ImageDestroy($im1);
$icon['filename'] = 'f1' . $imageext;
$fs->delete_area_files($context->id, $component, $filearea, $itemid);
$fs->create_file_from_string($icon, $data);
ob_start();
if (!$imagefnc($im2, NULL, $quality, $filters)) {
ob_end_clean();
$fs->delete_area_files($context->id, $component, $filearea, $itemid);
return false;
}
$data = ob_get_clean();
ImageDestroy($im2);
$icon['filename'] = 'f2' . $imageext;
$fs->create_file_from_string($icon, $data);
return true;
}
