resize_and_crop.php
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<?php
list($width, $height) = getimagesize($_POST["imageSource"]);
$pWidth = $_POST["imageW"];
$pHeight = $_POST["imageH"];
$ext = end(explode(".",$_POST["imageSource"]));
$function = returnCorrectFunction($ext);
$image = $function($_POST["imageSource"]);
$width = imagesx($image);
$height = imagesy($image);
// Resample
$image_p = imagecreatetruecolor($pWidth, $pHeight);
setTransparency($image,$image_p,$ext);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $pWidth, $pHeight, $width, $height);
imagedestroy($image);
$widthR = imagesx($image_p);
$hegihtR = imagesy($image_p);
if($_POST["imageRotate"]){
$angle = 360 - $_POST["imageRotate"];
$image_p = imagerotate($image_p,$angle,0);
$pWidth = imagesx($image_p);
$pHeight = imagesy($image_p);
}
if($pWidth > $_POST["viewPortW"]){
$src_x = abs(abs($_POST["imageX"]) - abs(($_POST["imageW"] - $pWidth) / 2));
$dst_x = 0;
}else{
$src_x = 0;
$dst_x = $_POST["imageX"] + (($_POST["imageW"] - $pWidth) / 2);
}
if($pHeight > $_POST["viewPortH"]){
$src_y = abs($_POST["imageY"] - abs(($_POST["imageH"] - $pHeight) / 2));
$dst_y = 0;
}else{
$src_y = 0;
$dst_y = $_POST["imageY"] + (($_POST["imageH"] - $pHeight) / 2);
}
$viewport = imagecreatetruecolor($_POST["viewPortW"],$_POST["viewPortH"]);
setTransparency($image_p,$viewport,$ext);
imagecopy($viewport, $image_p, $dst_x, $dst_y, $src_x, $src_y, $pWidth, $pHeight);
imagedestroy($image_p);
$selector = imagecreatetruecolor($_POST["selectorW"],$_POST["selectorH"]);
setTransparency($viewport,$selector,$ext);
imagecopy($selector, $viewport, 0, 0, $_POST["selectorX"], $_POST["selectorY"],$_POST["viewPortW"],$_POST["viewPortH"]);
$file = "tmp/test".time().".".$ext;
parseImage($ext,$selector,$file);
imagedestroy($viewport);
//Return value
echo $file;
/* Functions */
function returnCorrectFunction($ext){
$function = "";
switch($ext){
case "png":
$function = "imagecreatefrompng";
break;
case "jpeg":
$function = "imagecreatefromjpeg";
break;
case "jpg":
$function = "imagecreatefromjpeg";
break;
case "gif":
$function = "imagecreatefromgif";
break;
}
return $function;
}
function parseImage($ext,$img,$file = null){
switch($ext){
case "png":
imagepng($img,($file != null ? $file : ''));
break;
case "jpeg":
imagejpeg($img,($file ? $file : ''),90);
break;
case "jpg":
imagejpeg($img,($file ? $file : ''),90);
break;
case "gif":
imagegif($img,($file ? $file : ''));
break;
}
}
function setTransparency($imgSrc,$imgDest,$ext){
if($ext == "png" || $ext == "gif"){
$trnprt_indx = imagecolortransparent($imgSrc);
// If we have a specific transparent color
if ($trnprt_indx >= 0) {
// Get the original image's transparent color's RGB values
$trnprt_color = imagecolorsforindex($imgSrc, $trnprt_indx);
// Allocate the same color in the new image resource
$trnprt_indx = imagecolorallocate($imgDest, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $trnprt_indx);
// Set the background color for new image to transparent
imagecolortransparent($imgDest, $trnprt_indx);
}
// Always make a transparent background color for PNGs that don't have one allocated already
elseif ($ext == "png") {
// Turn off transparency blending (temporarily)
imagealphablending($imgDest, true);
// Create a new transparent color for image
$color = imagecolorallocatealpha($imgDest, 0, 0, 0, 127);
// Completely fill the background of the new image with allocated color.
imagefill($imgDest, 0, 0, $color);
// Restore transparency blending
imagesavealpha($imgDest, true);
}
}
}
?>