/**
* Method to add watermark on existing image.
*
* @param string $backgroundImagePath The path to the image that needs to be added with watermark.
* @param string $destinationPath The path to the image output
* @param string $destinationType The type of the output file
* @param string $watermarkImagePath The path to the watermark image.
* @param int $positionX The x position of where the watermark should be positioned.
* @param int $positionY The y position of where the watermark should be positioned.
*
* @return bool True on sucess.
* */
public static function addWatermark($backgroundImagePath, $destinationPath, $destinationType, $watermarkImagePath, $positionX = 0, $positionY = 0, $deleteBackgroundImage = true)
{
// Set output quality
$config = CFactory::getConfig();
$imgQuality = $config->get('output_image_quality');
$pngQuality = ($imgQuality - 100) / 11.111111;
$pngQuality = round(abs($pngQuality));
$watermarkInfo = getimagesize($watermarkImagePath);
$background = CImageHelper::open($backgroundImagePath, $destinationType);
$watermark = CImageHelper::open($watermarkImagePath, $watermarkInfo['mime']);
list($backgroundWidth, $backgroundHeight) = getimagesize($backgroundImagePath);
// Get overlay image width and hight
$watermarkWidth = imagesx($watermark);
$watermarkHeight = imagesy($watermark);
// Combine background image and watermark into a single output image
imagecopy($background, $watermark, $positionX, $positionY, 0, 0, $watermarkWidth, $watermarkHeight);
// Output
ob_start();
// Test if type is png
if ($destinationType == 'image/png' || $destinationType == 'image/x-png') {
imagepng($background, null, $pngQuality);
} elseif ($destinationType == 'image/gif') {
imagegif($background);
} else {
imagejpeg($background, null, $imgQuality);
}
$output = ob_get_contents();
ob_end_clean();
// Delete old image
if (JFile::exists($backgroundImagePath) && $deleteBackgroundImage) {
JFile::delete($backgroundImagePath);
}
// Free any memory from the existing image resources
imagedestroy($background);
imagedestroy($watermark);
return JFile::write($destinationPath, $output);
}
/**
* Method to add watermark on existing image.
*
* @param string $backgroundImagePath The path to the image that needs to be added with watermark.
* @param string $destinationPath The path to the image output
* @param string $destinationType The type of the output file
* @param string $watermarkImagePath The path to the watermark image.
* @param int $positionX The x position of where the watermark should be positioned.
* @param int $positionY The y position of where the watermark should be positioned.
*
* @return bool True on sucess.
**/
public static function addWatermark($backgroundImagePath, $destinationPath, $destinationType, $watermarkImagePath, $positionX = 0, $positionY = 0, $deleteBackgroundImage = true)
{
$watermarkInfo = getimagesize($watermarkImagePath);
$background = CImageHelper::open($backgroundImagePath, $destinationType);
$watermark = CImageHelper::open($watermarkImagePath, $watermarkInfo['mime']);
list($backgroundWidth, $backgroundHeight) = getimagesize($backgroundImagePath);
// Try to make the watermark image transparent
imagecolortransparent($watermark, imagecolorat($watermark, 0, 0));
// Get overlay image width and hight
$watermarkWidth = imagesx($watermark);
$watermarkHeight = imagesy($watermark);
// Combine background image and watermark into a single output image
imagecopymerge($background, $watermark, $positionX, $positionY, 0, 0, $watermarkWidth, $watermarkHeight, 100);
// Output
ob_start();
// Test if type is png
if ($destinationType == 'image/png' || $destinationType == 'image/x-png') {
imagepng($background);
} elseif ($destinationType == 'image/gif') {
imagegif($background);
} else {
imagejpeg($background, null, 80);
}
$output = ob_get_contents();
ob_end_clean();
// Delete old image
if (JFile::exists($backgroundImagePath) && $deleteBackgroundImage) {
JFile::delete($backgroundImagePath);
}
// Free any memory from the existing image resources
imagedestroy($background);
imagedestroy($watermark);
return JFile::write($destinationPath, $output);
}
public static function resize($srcPath, $destPath, $destType, $destWidth, $destHeight, $sourceX = 0, $sourceY = 0, $currentWidth=0, $currentHeight=0)
{
require_once(JPATH_SITE.DS.'components'.DS.'com_community'.DS.'libraries'.DS.'core.php');
require_once(JPATH_SITE.DS.'components'.DS.'com_community'.DS.'helpers'.DS.'image.php');
// See if we can grab image transparency
$image = CImageHelper::open( $srcPath , $destType );
$transparentIndex = imagecolortransparent( $image );
// Create new image resource
$image_p = ImageCreateTrueColor( $destWidth , $destHeight );
$background = ImageColorAllocate( $image_p , 255, 255, 255 );
// test if memory is enough
if($image_p == FALSE){
echo 'Image resize fail. Please increase PHP memory';
return false;
}
// Set the new image background width and height
$resourceWidth = $destWidth;
$resourceHeight = $destHeight;
if(empty($currentHeight) && empty($currentWidth))
{
list($currentWidth , $currentHeight) = getimagesize( $srcPath );
}
// If image is smaller, just copy to the center
$targetX = 0;
$targetY = 0;
// If the height and width is smaller, copy it to the center.
if( $destType != 'image/jpg' && $destType != 'image/jpeg' && $destType != 'image/pjpeg' )
{
if( ($currentHeight < $destHeight) && ($currentWidth < $destWidth) )
{
$targetX = intval( ($destWidth - $currentWidth) / 2);
$targetY = intval( ($destHeight - $currentHeight) / 2);
// Since the
$destWidth = $currentWidth;
$destHeight = $currentHeight;
}
}
// Resize GIF/PNG to handle transparency
if( $destType == 'image/gif' )
{
$colorTransparent = imagecolortransparent($image);
imagepalettecopy($image, $image_p);
imagefill($image_p, 0, 0, $colorTransparent);
imagecolortransparent($image_p, $colorTransparent);
imagetruecolortopalette($image_p, true, 256);
imagecopyresized($image_p, $image, $targetX, $targetY, $sourceX, $sourceY, $destWidth , $destHeight , $currentWidth , $currentHeight );
}
else if( $destType == 'image/png' || $destType == 'image/x-png')
{
// Disable alpha blending to keep the alpha channel
imagealphablending( $image_p , false);
imagesavealpha($image_p,true);
$transparent = imagecolorallocatealpha($image_p, 255, 255, 255, 127);
imagefilledrectangle($image_p, 0, 0, $resourceWidth, $resourceHeight, $transparent);
imagecopyresampled($image_p , $image, $targetX, $targetY, $sourceX, $sourceY, $destWidth, $destHeight, $currentWidth, $currentHeight);
}
else
{
// Turn off alpha blending to keep the alpha channel
imagealphablending( $image_p , false );
imagecopyresampled( $image_p , $image, $targetX, $targetY, $sourceX, $sourceY, $destWidth , $destHeight , $currentWidth , $currentHeight );
}
// Output
ob_start();
// Test if type is png
if( $destType == 'image/png' || $destType == 'image/x-png' )
{
imagepng( $image_p );
}
elseif ( $destType == 'image/gif')
{
imagegif( $image_p );
}
else
{
// We default to use jpeg
imagejpeg($image_p, null, 80);
}
$output = ob_get_contents();
ob_end_clean();
// @todo, need to verify that the $output is indeed a proper image data
return JFile::write( $destPath , $output );
}
