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<?php
/**
* gd.thumbnail.inc.php
*
* @author Ian Selby (ian@gen-x-design.com)
* @copyright Copyright 2006-2011
* @version 1.3.0 (based on 1.1.3)
* @modded by Alex Rabe
*
*/

/**
* PHP class for dynamically resizing, cropping, and rotating images for thumbnail purposes and either displaying them on-the-fly or saving them.
*
*/
class ngg_Thumbnail {
/**
* Error message to display, if any
*
* @var string
*/
var $errmsg;
/**
* Whether or not there is an error
*
* @var boolean
*/
var $error;
/**
* Format of the image file
*
* @var string
*/
var $format;
/**
* File name and path of the image file
*
* @var string
*/
var $fileName;
/**
* Current dimensions of working image
*
* @var array
*/
var $currentDimensions;
/**
* New dimensions of working image
*
* @var array
*/
var $newDimensions;
/**
* Image resource for newly manipulated image
*
* @var resource
* @access private
*/
var $newImage;
/**
* Image resource for image before previous manipulation
*
* @var resource
* @access private
*/
var $oldImage;
/**
* Image resource for image being currently manipulated
*
* @var resource
* @access private
*/
var $workingImage;
/**
* Percentage to resize image by
*
* @var int
* @access private
*/
var $percent;
/**
* Maximum width of image during resize
*
* @var int
* @access private
*/
var $maxWidth;
/**
* Maximum height of image during resize
*
* @var int
* @access private
*/
var $maxHeight;
/**
* Image for Watermark
*
* @var string
*
*/
var $watermarkImgPath;
/**
* Text for Watermark
*
* @var string
*
*/
var $watermarkText;
/**
* Image Resource ID for Watermark
*
* @var string
*
*/
function ngg_Thumbnail($fileName,$no_ErrorImage = false) {
//make sure the GD library is installed
if(!function_exists("gd_info")) {
echo 'You do not have the GD Library installed. This class requires the GD library to function properly.' . "\n";
echo 'visit http://us2.php.net/manual/en/ref.image.php for more information';
exit;
}
//initialize variables
$this->errmsg = '';
$this->error = false;
$this->currentDimensions = array();
$this->newDimensions = array();
$this->fileName = $fileName;
$this->percent = 100;
$this->maxWidth = 0;
$this->maxHeight = 0;
$this->watermarkImgPath = '';
$this->watermarkText = '';

//check to see if file exists
if(!file_exists($this->fileName)) {
$this->errmsg = 'File not found';
$this->error = true;
}
//check to see if file is readable
elseif(!is_readable($this->fileName)) {
$this->errmsg = 'File is not readable';
$this->error = true;
}

//if there are no errors, determine the file format
if($this->error == false) {
$data = @getimagesize($this->fileName);
if (isset($data) && is_array($data)) {
$extensions = array('1' => 'GIF', '2' => 'JPG', '3' => 'PNG');
$extension = array_key_exists($data[2], $extensions) ? $extensions[$data[2]] : '';
if($extension) {
$this->format = $extension;
} else {
$this->errmsg = 'Unknown file format';
$this->error = true;
}
} else {
$this->errmsg = 'File is not an image';
$this->error = true;
}
}

// increase memory-limit if possible, GD needs this for large images
// @ini_set('memory_limit', '128M');

if($this->error == false) {
// Check memory consumption if file exists
$this->checkMemoryForImage($this->fileName);
}

//initialize resources if no errors
if($this->error == false) {

switch($this->format) {
case 'GIF':
$this->oldImage = ImageCreateFromGif($this->fileName);
break;
case 'JPG':
$this->oldImage = ImageCreateFromJpeg($this->fileName);
break;
case 'PNG':
$this->oldImage = ImageCreateFromPng($this->fileName);
break;
}
if (!$this->oldImage) {
$this->errmsg = 'Create Image failed. Check memory limit';
$this->error = true;
} else {
$size = GetImageSize($this->fileName);
$this->currentDimensions = array('width'=>$size[0],'height'=>$size[1]);
$this->newImage = $this->oldImage;
}
}


if($this->error == true) {
if(!$no_ErrorImage)
$this->showErrorImage();
return;
}
}

/**
* Calculate the memory limit
*
*/
function checkMemoryForImage( $filename ){

if ( (function_exists('memory_get_usage')) && (ini_get('memory_limit')) ) {
$imageInfo = getimagesize($filename);
switch($this->format) {
case 'GIF':
// measured factor 1 is better
$CHANNEL = 1;
break;
case 'JPG':
$CHANNEL = $imageInfo['channels'];
break;
case 'PNG':
// didn't get the channel for png
$CHANNEL = 3;
break;
}
$MB = 1048576; // number of bytes in 1M
$K64 = 65536; // number of bytes in 64K
$TWEAKFACTOR = 1.68; // Or whatever works for you
$memoryNeeded = round( ( $imageInfo[0] * $imageInfo[1]
* $imageInfo['bits']
* $CHANNEL / 8
+ $K64
) * $TWEAKFACTOR
);
$memoryNeeded = memory_get_usage() + $memoryNeeded;
// get memory limit
$memory_limit = ini_get('memory_limit');

// PHP docs : Note that to have no memory limit, set this directive to -1.
if ($memory_limit == -1 ) return;

// Just check megabyte limits, not higher
if ( strtolower(substr($memory_limit, -1)) == 'm' ) {

if ($memory_limit != '') {
$memory_limit = substr($memory_limit, 0, -1) * 1024 * 1024;
}

if ($memoryNeeded > $memory_limit) {
$memoryNeeded = round ($memoryNeeded / 1024 / 1024, 2);
$this->errmsg = 'Exceed Memory limit. Require : '.$memoryNeeded. " MByte" ;
$this->error = true;
}
}
}
return;
}

/**
* Must be called to free up allocated memory after all manipulations are done
*
*/
function destruct() {
if(is_resource($this->newImage)) @ImageDestroy($this->newImage);
if(is_resource($this->oldImage)) @ImageDestroy($this->oldImage);
if(is_resource($this->workingImage)) @ImageDestroy($this->workingImage);
}

/**
* Returns the current width of the image
*
* @return int
*/
function getCurrentWidth() {
return $this->currentDimensions['width'];
}

/**
* Returns the current height of the image
*
* @return int
*/
function getCurrentHeight() {
return $this->currentDimensions['height'];
}

/**
* Calculates new image width
*
* @param int $width
* @param int $height
* @return array
*/
function calcWidth($width,$height) {
$newWp = (100 * $this->maxWidth) / $width;
$newHeight = ($height * $newWp) / 100;
return array('newWidth'=>intval($this->maxWidth),'newHeight'=>intval($newHeight));
}

/**
* Calculates new image height
*
* @param int $width
* @param int $height
* @return array
*/
function calcHeight($width,$height) {
$newHp = (100 * $this->maxHeight) / $height;
$newWidth = ($width * $newHp) / 100;
return array('newWidth'=>intval($newWidth),'newHeight'=>intval($this->maxHeight));
}

/**
* Calculates new image size based on percentage
*
* @param int $width
* @param int $height
* @return array
*/
function calcPercent($width,$height) {
$newWidth = ($width * $this->percent) / 100;
$newHeight = ($height * $this->percent) / 100;
return array('newWidth'=>intval($newWidth),'newHeight'=>intval($newHeight));
}

/**
* Calculates new image size based on width and height, while constraining to maxWidth and maxHeight
*
* @param int $width
* @param int $height
*/
function calcImageSize($width,$height) {
$newSize = array('newWidth'=>$width,'newHeight'=>$height);

if($this->maxWidth > 0) {

$newSize = $this->calcWidth($width,$height);

if($this->maxHeight > 0 && $newSize['newHeight'] > $this->maxHeight) {
$newSize = $this->calcHeight($newSize['newWidth'],$newSize['newHeight']);
}

//$this->newDimensions = $newSize;
}

if($this->maxHeight > 0) {
$newSize = $this->calcHeight($width,$height);

if($this->maxWidth > 0 && $newSize['newWidth'] > $this->maxWidth) {
$newSize = $this->calcWidth($newSize['newWidth'],$newSize['newHeight']);
}

//$this->newDimensions = $newSize;
}

$this->newDimensions = $newSize;
}

/**
* Calculates new image size based percentage
*
* @param int $width
* @param int $height
*/
function calcImageSizePercent($width,$height) {
if($this->percent > 0) {
$this->newDimensions = $this->calcPercent($width,$height);
}
}

/**
* Displays error image
*
*/
function showErrorImage() {
header('Content-type: image/png');
$errImg = ImageCreate(220,25);
$bgColor = imagecolorallocate($errImg,0,0,0);
$fgColor1 = imagecolorallocate($errImg,255,255,255);
$fgColor2 = imagecolorallocate($errImg,255,0,0);
imagestring($errImg,3,6,6,'Error:',$fgColor2);
imagestring($errImg,3,55,6,$this->errmsg,$fgColor1);
imagepng($errImg);
imagedestroy($errImg);
}

/**
* Resizes image to fixed Width x Height
*
* @param int $Width
* @param int $Height
*/
function resizeFix($Width = 0, $Height = 0, $deprecated = 3) {
$this->newWidth = $Width;
$this->newHeight = $Height;

if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($this->newWidth,$this->newHeight);
}
else {
$this->workingImage = ImageCreate($this->newWidth,$this->newHeight);
}

// ImageCopyResampled(
$this->imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newWidth,
$this->newHeight,
$this->currentDimensions['width'],
$this->currentDimensions['height']
);

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newWidth;
$this->currentDimensions['height'] = $this->newHeight;
}


/**
* Resizes image to maxWidth x maxHeight
*
* @param int $maxWidth
* @param int $maxHeight
*/
function resize($maxWidth = 0, $maxHeight = 0, $deprecated = 3) {
$this->maxWidth = $maxWidth;
$this->maxHeight = $maxHeight;

$this->calcImageSize($this->currentDimensions['width'],$this->currentDimensions['height']);

if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
else {
$this->workingImage = ImageCreate($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}

// ImageCopyResampled(
$this->imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}

/**
* Resizes the image by $percent percent
*
* @param int $percent
*/
function resizePercent($percent = 0) {
$this->percent = $percent;

$this->calcImageSizePercent($this->currentDimensions['width'],$this->currentDimensions['height']);

if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}
else {
$this->workingImage = ImageCreate($this->newDimensions['newWidth'],$this->newDimensions['newHeight']);
}

$this->ImageCopyResampled(
$this->workingImage,
$this->oldImage,
0,
0,
0,
0,
$this->newDimensions['newWidth'],
$this->newDimensions['newHeight'],
$this->currentDimensions['width'],
$this->currentDimensions['height']
);

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
}

/**
* Crops the image from calculated center in a square of $cropSize pixels
*
* @param int $cropSize
*/
function cropFromCenter($cropSize) {
if($cropSize > $this->currentDimensions['width']) $cropSize = $this->currentDimensions['width'];
if($cropSize > $this->currentDimensions['height']) $cropSize = $this->currentDimensions['height'];

$cropX = intval(($this->currentDimensions['width'] - $cropSize) / 2);
$cropY = intval(($this->currentDimensions['height'] - $cropSize) / 2);

if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($cropSize,$cropSize);
}
else {
$this->workingImage = ImageCreate($cropSize,$cropSize);
}

$this->imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$cropX,
$cropY,
$cropSize,
$cropSize,
$cropSize,
$cropSize
);

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $cropSize;
$this->currentDimensions['height'] = $cropSize;
}

/**
* Advanced cropping function that crops an image using $startX and $startY as the upper-left hand corner.
*
* @param int $startX
* @param int $startY
* @param int $width
* @param int $height
*/
function crop($startX, $startY, $width, $height) {
//make sure the cropped area is not greater than the size of the image
if($width > $this->currentDimensions['width']) $width = $this->currentDimensions['width'];
if($height > $this->currentDimensions['height']) $height = $this->currentDimensions['height'];
//make sure not starting outside the image
if(($startX + $width) > $this->currentDimensions['width']) $startX = ($this->currentDimensions['width'] - $width);
if(($startY + $height) > $this->currentDimensions['height']) $startY = ($this->currentDimensions['height'] - $height);
if($startX < 0) $startX = 0;
if($startY < 0) $startY = 0;

if(function_exists("ImageCreateTrueColor")) {
$this->workingImage = ImageCreateTrueColor($width,$height);
}
else {
$this->workingImage = ImageCreate($width,$height);
}

$this->imagecopyresampled(
$this->workingImage,
$this->oldImage,
0,
0,
$startX,
$startY,
$width,
$height,
$width,
$height
);

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $height;
}

/**
* Outputs the image to the screen, or saves to $name if supplied. Quality of JPEG images can be controlled with the $quality variable
*
* @param int $quality
* @param string $name
*/
function show($quality=100,$name = '') {
switch($this->format) {
case 'GIF':
if($name != '') {
@ImageGif($this->newImage,$name) or $this->error = true;
}
else {
header('Content-type: image/gif');
ImageGif($this->newImage);
}
break;
case 'JPG':
if($name != '') {
@ImageJpeg($this->newImage,$name,$quality) or $this->error = true;
}
else {
header('Content-type: image/jpeg');
ImageJpeg($this->newImage,'',$quality);
}
break;
case 'PNG':
if($name != '') {
@ImagePng($this->newImage,$name) or $this->error = true;
}
else {
header('Content-type: image/png');
ImagePng($this->newImage);
}
break;
}
}

/**
* Saves image as $name (can include file path), with quality of # percent if file is a jpeg
*
* @param string $name
* @param int $quality
* @return bool errorstate
*/
function save($name,$quality=100) {
$this->show($quality,$name);
if ($this->error == true) {
$this->errmsg = 'Create Image failed. Check safe mode settings';
return false;
}

if( function_exists('do_action') )
do_action('ngg_ajax_image_save', $name);

return true;
}

/**
* Creates Apple-style reflection under image, optionally adding a border to main image
*
* @param int $percent
* @param int $reflection
* @param int $white
* @param bool $border
* @param string $borderColor
*/
function createReflection($percent,$reflection,$white,$border = true,$borderColor = '#a4a4a4') {
$width = $this->currentDimensions['width'];
$height = $this->currentDimensions['height'];

$reflectionHeight = intval($height * ($reflection / 100));
$newHeight = $height + $reflectionHeight;
$reflectedPart = $height * ($percent / 100);

$this->workingImage = ImageCreateTrueColor($width,$newHeight);

ImageAlphaBlending($this->workingImage,true);

$colorToPaint = ImageColorAllocateAlpha($this->workingImage,255,255,255,0);
ImageFilledRectangle($this->workingImage,0,0,$width,$newHeight,$colorToPaint);

imagecopyresampled(
$this->workingImage,
$this->newImage,
0,
0,
0,
$reflectedPart,
$width,
$reflectionHeight,
$width,
($height - $reflectedPart));
$this->imageFlipVertical();

imagecopy($this->workingImage,$this->newImage,0,0,0,0,$width,$height);

imagealphablending($this->workingImage,true);

for($i=0;$i<$reflectionHeight;$i++) {
$colorToPaint = imagecolorallocatealpha($this->workingImage,255,255,255,($i/$reflectionHeight*-1+1)*$white);
imagefilledrectangle($this->workingImage,0,$height+$i,$width,$height+$i,$colorToPaint);
}

if($border == true) {
$rgb = $this->hex2rgb($borderColor,false);
$colorToPaint = imagecolorallocate($this->workingImage,$rgb[0],$rgb[1],$rgb[2]);
imageline($this->workingImage,0,0,$width,0,$colorToPaint); //top line
imageline($this->workingImage,0,$height,$width,$height,$colorToPaint); //bottom line
imageline($this->workingImage,0,0,0,$height,$colorToPaint); //left line
imageline($this->workingImage,$width-1,0,$width-1,$height,$colorToPaint); //right line
}

$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
$this->currentDimensions['width'] = $width;
$this->currentDimensions['height'] = $newHeight;
}

/**
* Flip an image.
*
* @param bool $horz flip the image in horizontal mode
* @param bool $vert flip the image in vertical mode
*/
function flipImage( $horz = false, $vert = false ) {

$sx = $vert ? ($this->currentDimensions['width'] - 1) : 0;
$sy = $horz ? ($this->currentDimensions['height'] - 1) : 0;
$sw = $vert ? -$this->currentDimensions['width'] : $this->currentDimensions['width'];
$sh = $horz ? -$this->currentDimensions['height'] : $this->currentDimensions['height'];

$this->workingImage = imagecreatetruecolor( $this->currentDimensions['width'], $this->currentDimensions['height'] );

$this->imagecopyresampled($this->workingImage, $this->oldImage, 0, 0, $sx, $sy, $this->currentDimensions['width'], $this->currentDimensions['height'], $sw, $sh) ;
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;

return true;
}

/**
* Rotate an image clockwise or counter clockwise
*
* @param string $direction could be CW or CCW
*/
function rotateImage( $dir = 'CW' ) {

$angle = ($dir == 'CW') ? 90 : -90;

if ( function_exists('imagerotate') ) {
$this->workingImage = imagerotate($this->oldImage, 360 - $angle, 0); // imagerotate() rotates CCW
$this->currentDimensions['width'] = imagesx($this->workingImage);
$this->currentDimensions['height'] = imagesy($this->workingImage);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;
return true;
}

$this->workingImage = imagecreatetruecolor( $this->currentDimensions['height'], $this->currentDimensions['width'] );

imagealphablending($this->workingImage, false);
imagesavealpha($this->workingImage, true);

switch ($angle) {

case 90 :
for( $x = 0; $x < $this->currentDimensions['width']; $x++ ) {
for( $y = 0; $y < $this->currentDimensions['height']; $y++ ) {
if ( !imagecopy($this->workingImage, $this->oldImage, $this->currentDimensions['height'] - $y - 1, $x, $x, $y, 1, 1) )
return false;
}
}
break;

case -90 :
for( $x = 0; $x < $this->currentDimensions['width']; $x++ ) {
for( $y = 0; $y < $this->currentDimensions['height']; $y++ ) {
if ( !imagecopy($this->workingImage, $this->oldImage, $y, $this->currentDimensions['width'] - $x - 1, $x, $y, 1, 1) )
return false;
}
}
break;

default :
return false;
}

$this->currentDimensions['width'] = imagesx($this->workingImage);
$this->currentDimensions['height'] = imagesy($this->workingImage);
$this->oldImage = $this->workingImage;
$this->newImage = $this->workingImage;

return true;

}

/**
* Inverts working image, used by reflection function
*
* @access private
*/
function imageFlipVertical() {
$x_i = imagesx($this->workingImage);
$y_i = imagesy($this->workingImage);

for($x = 0; $x < $x_i; $x++) {
for($y = 0; $y < $y_i; $y++) {
imagecopy($this->workingImage,$this->workingImage,$x,$y_i - $y - 1, $x, $y, 1, 1);
}
}
}

/**
* Converts hexidecimal color value to rgb values and returns as array/string
*
* @param string $hex
* @param bool $asString
* @return array|string
*/
function hex2rgb($hex, $asString = false) {
// strip off any leading #
if (0 === strpos($hex, '#')) {
$hex = substr($hex, 1);
} else if (0 === strpos($hex, '&H')) {
$hex = substr($hex, 2);
}

// break into hex 3-tuple
$cutpoint = ceil(strlen($hex) / 2)-1;
$rgb = explode(':', wordwrap($hex, $cutpoint, ':', $cutpoint), 3);

// convert each tuple to decimal
$rgb[0] = (isset($rgb[0]) ? hexdec($rgb[0]) : 0);
$rgb[1] = (isset($rgb[1]) ? hexdec($rgb[1]) : 0);
$rgb[2] = (isset($rgb[2]) ? hexdec($rgb[2]) : 0);

return ($asString ? "{$rgb[0]} {$rgb[1]} {$rgb[2]}" : $rgb);
}

/**
* Based on the Watermark function by Marek Malcherek
* http://www.malcherek.de
*
* @param string $color
* @param string $wmFont
* @param int $wmSize
* @param int $wmOpaque
*/
function watermarkCreateText($color = '000000',$wmFont, $wmSize = 10, $wmOpaque = 90 ){
// set font path
$wmFontPath = NGGALLERY_ABSPATH."fonts/".$wmFont;
if ( !is_readable($wmFontPath))
return;

// This function requires both the GD library and the FreeType library.
if ( !function_exists('ImageTTFBBox') )
return;

$TextSize = @ImageTTFBBox($wmSize, 0, $wmFontPath, $this->watermarkText) or die;
$TextWidth = abs($TextSize[2]) + abs($TextSize[0]);
$TextHeight = abs($TextSize[7]) + abs($TextSize[1]);
// Create Image for Text
$this->workingImage = ImageCreateTrueColor($TextWidth, $TextHeight);
ImageSaveAlpha($this->workingImage, true);
ImageAlphaBlending($this->workingImage, false);
$bgText = imagecolorallocatealpha($this->workingImage, 255, 255, 255, 127);
imagefill($this->workingImage, 0, 0, $bgText);
$wmTransp = 127 -( $wmOpaque * 1.27 );
$rgb = $this->hex2rgb($color,false);
$TextColor = imagecolorallocatealpha($this->workingImage, $rgb[0], $rgb[1], $rgb[2], $wmTransp);

// Create Text on image
imagettftext($this->workingImage, $wmSize, 0, 0, abs($TextSize[5]), $TextColor, $wmFontPath, $this->watermarkText);
$this->watermarkImgPath = $this->workingImage;

return;
}

/**
* Modfied Watermark function by Steve Peart
* http://parasitehosting.com/
*
* @param string $relPOS
* @param int $xPOS
* @param int $yPOS
*/
function watermarkImage( $relPOS = 'botRight', $xPOS = 0, $yPOS = 0) {

// if it's a resource ID take it as watermark text image
if(is_resource($this->watermarkImgPath)) {
$this->workingImage = $this->watermarkImgPath;
} else {
// Would you really want to use anything other than a png?
$this->workingImage = @imagecreatefrompng($this->watermarkImgPath);
// if it's not a valid file die...
if (empty($this->workingImage) or (!$this->workingImage))
return;
}

imagealphablending($this->workingImage, false);
imagesavealpha($this->workingImage, true);
$sourcefile_width=imageSX($this->oldImage);
$sourcefile_height=imageSY($this->oldImage);
$watermarkfile_width=imageSX($this->workingImage);
$watermarkfile_height=imageSY($this->workingImage);
switch(substr($relPOS, 0, 3)){
case 'top': $dest_y = 0 + $yPOS; break;
case 'mid': $dest_y = ($sourcefile_height / 2) - ($watermarkfile_height / 2); break;
case 'bot': $dest_y = $sourcefile_height - $watermarkfile_height - $yPOS; break;
default : $dest_y = 0; break;
}
switch(substr($relPOS, 3)){
case 'Left' : $dest_x = 0 + $xPOS; break;
case 'Center': $dest_x = ($sourcefile_width / 2) - ($watermarkfile_width / 2); break;
case 'Right': $dest_x = $sourcefile_width - $watermarkfile_width - $xPOS; break;
default : $dest_x = 0; break;
}

// debug
// $this->errmsg = 'X '.$dest_x.' Y '.$dest_y;
// $this->showErrorImage();

// if a gif, we have to upsample it to a truecolor image
if($this->format == 'GIF') {
$tempimage = imagecreatetruecolor($sourcefile_width,$sourcefile_height);
imagecopy($tempimage, $this->oldImage, 0, 0, 0, 0,$sourcefile_width, $sourcefile_height);
$this->newImage = $tempimage;
}

imagecopy($this->newImage, $this->workingImage, $dest_x, $dest_y, 0, 0,$watermarkfile_width, $watermarkfile_height);
}

/**
* Modfied imagecopyresampled function to save transparent images
* See : http://www.akemapa.com/2008/07/10/php-gd-resize-transparent-image-png-gif/
* @since 1.9.0
*
* @param resource $dst_image
* @param resource $src_image
* @param int $dst_x
* @param int $dst_y
* @param int $src_x
* @param int $src_y
* @param int $dst_w
* @param int $dst_h
* @param int $src_w
* @param int $src_h
* @return bool
*/
function imagecopyresampled( &$dst_image , $src_image , $dst_x , $dst_y , $src_x , $src_y , $dst_w , $dst_h , $src_w , $src_h) {

// Check if this image is PNG or GIF, then set if Transparent
if( $this->format == 'GIF' || $this->format == 'PNG'){
imagealphablending($dst_image, false);
imagesavealpha($dst_image, true);
$transparent = imagecolorallocatealpha($dst_image, 255, 255, 255, 127);
imagefilledrectangle($dst_image, 0, 0, $dst_w, $dst_h, $transparent);
}

imagecopyresampled($dst_image , $src_image , $dst_x , $dst_y , $src_x , $src_y , $dst_w , $dst_h , $src_w , $src_h);
return true;
}
}
?>

Change log

r1003 by alex.cologne on Sep 28, 2011   Diff
Keep images transparency for PNG and GIF
format
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Older revisions

r992 by alex.cologne on Sep 11, 2011   Diff
Check for -1 in memory limit
r934 by alex.cologne on May 6, 2011   Diff
Handle gigabyte limits
r912 by alex.cologne on Feb 15, 2011   Diff
Bugfix : Improved image format
detection in gd.thumbnail class (THX
to Kupar.b)
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