/**
* Resizes the image base on the width provided.
* This resize maintain's the image aspect ratio.
*
* @param Image $image Image to process
*
* @return Image
*/
protected function processImage(Image $image)
{
$this->_throwExceptionIfNoWidthIsSet();
$width = $this->get("width");
$maxHeight = $this->has("max-height") ? $this->get("max-height") : 0;
$imageResource = $image->createImageResource();
list($oldWidth, $oldHeight) = getimagesize($image->getFullPath());
//////////////////////////////////////////////////////////////////////
// For Aspect ratio
$newHeight = 0;
if ($maxHeight == 0) {
// if the height is not specified calculate the relative height
$newHeight = $width * $oldHeight / $oldWidth;
}
//////////////////////////////////////////////////////////////////////
if ($maxHeight > 0) {
$photoIsPortrait = $oldHeight > $oldWidth;
if ($photoIsPortrait) {
$width = $maxHeight * $oldWidth / $oldHeight;
$newHeight = $maxHeight;
} else {
// This is a landscape photo
$newHeight = $width * ($oldHeight / $oldWidth);
}
}
$newImageResource = imagecreatetruecolor($width, $newHeight);
imagecopyresampled($newImageResource, $imageResource, 0, 0, 0, 0, $width, $newHeight, $oldWidth, $oldHeight);
$image->createImage($newImageResource);
}
/**
* Converts image to grayscale
*
* @param Image $image Image to process
*
* @return void
*/
protected function processImage(Image $image)
{
$imageResource = $image->createImageResource();
list($width, $height) = getimagesize($image->getFullPath());
for ($i = 0; $i < $width; $i++) {
for ($j = 0; $j < $height; $j++) {
// get the rgb value for current pixel
$rgb = imagecolorat($imageResource, $i, $j);
// extract each value for r, g, b
$rr = $rgb >> 16 & 0xff;
$gg = $rgb >> 8 & 0xff;
$bb = $rgb & 0xff;
// get the Value from the RGB value
$g = round(($rr + $gg + $bb) / 3);
// grayscale values have r=g=b=g
$val = imagecolorallocate($imageResource, $g, $g, $g);
// set the gray value
imagesetpixel($imageResource, $i, $j, $val);
}
}
$image->createImage($imageResource);
}
/**
* Formats the file by applying the file name strategy defined
*
* @param Image $image Image object being processed
*
* @return void
*/
private function _formatFile(Image $image)
{
$imageFileFormatter = new ImageFileFormatter($image);
$newFileName = $imageFileFormatter->generate($this->_format, []);
// Rename the final file to its designated format
$imageName = $image->getImageName();
if ($imageName !== $newFileName) {
$this->getFileSystem()->rename($imageName, $newFileName);
}
$image->setImageName($newFileName);
}
/**
* Get the physical dimension of the image
*
* @return array
*/
private function _getImageDimension()
{
$imagePath = $this->_image->getFullPath();
// Use the original width and height of the image
return getimagesize($imagePath);
}
