<?php

// WHEN YOU CLICK ON THIS SCRIPT YOU Will SEE A
// GRAY PAGE 
// JUST RELOAD YOUR FM & YOUR NEW 
// GRAYSCALE-TINTED  IMAGE WILL BE THERE.

// ADD YOUR FILE NAME.
// PICK YOUR DESTINATION FILE NAME. IF YOU USE 
// YOUR ORIGINAL NAME HERE THE ORIGINAL IMAGE WILL 
// WILL TURN GRAYSCALE. 
// ADD YOUR TINT COLOR.
// USE RGB (255) OR HEX (0xFF)
// AMOUNT OF TRANSPARENCY. 0 - 127. (SOLID TO CLEAR)
$originalFileName  = "draglandsm.jpg";
$destinationFileName = "draglandsmC_TINT_40.jpg";
$Rtint = 0x70;
$Gtint = 0x70;
$Btint = 0xdf;
$transparency =40;

// CREATE A COPY OF THE ORIGINAL IMAGE.
// THIS IS FOR JPG. CHANGE BELOW TO USE PNG.
$fullPath = explode(".",$originalFileName);
$lastIndex = sizeof($fullPath) - 1;
$extension = $fullPath[$lastIndex];
if (preg_match("/jpg|jpeg|JPG|JPEG/", $extension)){
   $sourceImage = imagecreatefromjpeg($originalFileName);
 }

// GET IMAGE DIMENSIONS.
$img_width = imageSX($sourceImage);
$img_height = imageSY($sourceImage);

// CONVERT TO GRAYSCALE.
for ($y = 0; $y <$img_height; $y++) { 
   for ($x = 0; $x <$img_width; $x++) { 
$rgb = imagecolorat($sourceImage, $x, $y);
$red = ($rgb >> 16) & 0xFF;
$green = ($rgb >> 8) & 0xFF;
$blue = $rgb & 0xFF;
$gray = round(.299*$red + .587*$green + .114*$blue);

// SHIFT GRAY LEVEL TO THE LEFT.
$grayR = $gray << 16; // R: red
$grayG = $gray << 8;  // G: green
$grayB = $gray;    // B: blue
     
// OPERATION TO COMPUTE GRAY VALUE.
$grayColor = $grayR | $grayG | $grayB;

// SET THE PIXEL COLOR
imagesetpixel ($sourceImage, $x, $y, $grayColor);
imagecolorallocate ($sourceImage, $gray, $gray, $gray);
   }
 }

// COPY PIXEL VALUES TO NEW FILE BUFFER.
// PLUS TRANSLUCENT RECTANGLE.
$destinationImage = ImageCreateTrueColor($img_width, $img_height);
imagecopy($destinationImage, $sourceImage, 0, 0, 0, 0, $img_width, $img_height);
$color = imagecolorallocatealpha($destinationImage, $Rtint, $Gtint, $Btint, $transparency);
imagefilledrectangle($destinationImage, 0, 0, $img_width, $img_height, $color);

// CREATE FILE TO DISK OR FM.
imagejpeg($destinationImage, $destinationFileName);
 
// DESTROY TEMP IMAGE BUFFERS.
imagedestroy($destinationImage);  
imagedestroy($sourceImage);

?>