function createThumbnail($path, $config, $width, $height, $image_bg, $image_stretch, $quality)
{
if (GKIS_Mystore_Image::checkCache(GKIS_Mystore_Image::translateName($path, $config['module_id']), $config['last_modification'], $config['module_id'])) {
return TRUE;
} else {
// importing classes
jimport('joomla.filesystem.file');
jimport('joomla.filesystem.folder');
jimport('joomla.filesystem.path');
//script configuration - increase memory limit to 64MB
ini_set('memory_limit', '64M');
// cache dir
$cache_dir = JPATH_ROOT . DS . 'modules' . DS . 'mod_image_show_gk4' . DS . 'cache' . DS;
// file path
$file = GKIS_Mystore_Image::getRealPath($path);
// filename
$filename = GKIS_Mystore_Image::translateName($path, $config['module_id']);
// Getting informations about image
if (is_file($file)) {
$imageData = getimagesize($file);
// loading image depends from type of image
if ($imageData['mime'] == 'image/jpeg' || $imageData['mime'] == 'image/pjpeg' || $imageData['mime'] == 'image/jpg') {
$imageSource = @imagecreatefromjpeg($file);
} elseif ($imageData['mime'] == 'image/gif') {
$imageSource = @imagecreatefromgif($file);
} else {
$imageSource = @imagecreatefrompng($file);
}
// here can be exist an error when image is to big - then class return blank page
// setting image size in variables
$imageSourceWidth = imagesx($imageSource);
$imageSourceHeight = imagesy($imageSource);
// Creating blank canvas
$imageBG = imagecreatetruecolor($width, $height);
// If image is JPG or GIF
if ($imageData['mime'] == 'image/jpeg' || $imageData['mime'] == 'image/pjpeg' || $imageData['mime'] == 'image/jpg' || $imageData['mime'] == 'image/gif') {
// when bg is set to transparent - use black background
if ($image_bg == 'transparent') {
$bgColorR = 0;
$bgColorG = 0;
$bgColorB = 0;
} else {
// in other situation - translate hex to RGB
$bg = $image_bg;
if (strlen($bg) == 4) {
$bg = $bg[0] . $bg[1] . $bg[1] . $bg[2] . $bg[2] . $bg[3] . $bg[3];
}
$hex_color = strtolower(trim($bg, '#;&Hh'));
$bg = array_map('hexdec', explode('.', wordwrap($hex_color, ceil(strlen($hex_color) / 3), '.', 1)));
$bgColorR = $bg[0];
$bgColorG = $bg[1];
$bgColorB = $bg[2];
}
// Creating color
$rgb = imagecolorallocate($imageBG, $bgColorR, $bgColorG, $bgColorB);
// filling canvas with new color
imagefill($imageBG, 0, 0, $rgb);
} else {
// for PNG images
$imageBG = imagecreatetruecolor($width, $height);
// enable transparent background
if ($image_bg == 'transparent') {
// create transparent color
$rgb = imagecolorallocatealpha($imageBG, 0, 0, 0, 127);
} else {
// create normal color
$bg = $image_bg;
// translate hex to RGB
$hex_color = strtolower(trim($bg, '#;&Hh'));
$bg = array_map('hexdec', explode('.', wordwrap($hex_color, ceil(strlen($hex_color) / 3), '.', 1)));
// creating color
$rgb = imagecolorallocate($imageBG, $bg[0], $bg[1], $bg[2]);
}
// filling the canvas
imagefill($imageBG, 0, 0, $rgb);
// enabling transparent settings for better quality
imagealphablending($imageBG, false);
imagesavealpha($imageBG, true);
}
// when stretching is disabled
if (!$image_stretch) {
// calculate ratio for first scaling
$ratio = $imageSourceWidth > $imageSourceHeight ? $width / $imageSourceWidth : $height / $imageSourceHeight;
// calculate new image size
$imageSourceNWidth = $imageSourceWidth * $ratio;
$imageSourceNHeight = $imageSourceHeight * $ratio;
// calculate ratio for second scaling
if ($width > $height) {
if ($imageSourceNHeight > $height) {
$ratio2 = $height / $imageSourceNHeight;
$imageSourceNHeight *= $ratio2;
$imageSourceNWidth *= $ratio2;
}
} else {
if ($imageSourceNWidth > $width) {
$ratio2 = $width / $imageSourceNWidth;
$imageSourceNHeight *= $ratio2;
$imageSourceNWidth *= $ratio2;
}
}
// setting position of putting thumbnail on canvas
$base_x = floor(($width - $imageSourceNWidth) / 2);
$base_y = floor(($height - $imageSourceNHeight) / 2);
} else {
// when stretching is disabled
$imageSourceNWidth = $width;
$imageSourceNHeight = $height;
$base_x = 0;
$base_y = 0;
}
// copy image
imagecopyresampled($imageBG, $imageSource, $base_x, $base_y, 0, 0, $imageSourceNWidth, $imageSourceNHeight, $imageSourceWidth, $imageSourceHeight);
// save image depends from MIME type
if ($imageData['mime'] == 'image/jpeg' || $imageData['mime'] == 'image/pjpeg' || $imageData['mime'] == 'image/jpg') {
imagejpeg($imageBG, $cache_dir . $filename, $quality);
} elseif ($imageData['mime'] == 'image/gif') {
imagegif($imageBG, $cache_dir . $filename);
} else {
imagepng($imageBG, $cache_dir . $filename);
}
return TRUE;
} else {
return FALSE;
}
}
}