<?php

    /* Passport Generator */
    /* Author: Usama Muneeb */

    // |-------frame-------------------|
    // |           ^                   |
    // |           dst_y               |
    // |           V                   |
    // |<  dst_x  >|----window----|    |
    // |           |              |    |
    // |           |    overlay   |    |
    // |           |              |    |
    // |           |--------------|    |
    // |                               |
    // |     (and some text)           |
    // |                               |
    // |-------------------------------|

    $infix_w = 64; //width of overlay.png
    $infix_h = 64; //height of overlay.png

    $placeholder_w = 64; //width of window (same as $infix_w if the window is carefully cut according to overlay size)!
    $placeholder_h = 64; //height of window (same as $infix_h if the window is carefully cut according to overlay size)!

    $dst_x = 64;   // Left margin (offset) of picture placement point
    $dst_y = 64;   // Top margin (offset) of picture placement point

    $frame_w = 192; //width of frame.png
    $frame_h = 192; //height of frame.png

    // create the canvas
    $dst_image = imagecreatetruecolor($frame_w,$frame_h);

    // fetch the embedded picture
    $src_image = imagecreatefrompng("overlay.png");

    // copy selected part of the picture onto the canvas
    imagecopyresampled($dst_image, $src_image, $dst_x, $dst_y, 0, 0, $frame_w, $frame_h,
                       ($infix_w/$placeholder_w)*$frame_w, ($infix_h/$placeholder_h)*$frame_h);

    //fetch the frame with transparent window
    //as of yet, frame.png MUST have the picture placeholder area set transparent
    // using Photoshop or equivalent.
    $src = imagecreatefrompng("frame.png");

    // place the frame over the canvas
    imagecopy($dst_image, $src, 0, 0, 0, 0, $frame_w, $frame_h);

    // allocate color and font
    $black = imagecolorallocate($dst_image, 255, 255, 255);
    $font_path = "./myFont.ttf";

    // write text
    imagettftext($dst_image, 20, 0, 30, 30, $black, $font_path, "Lorem Ipsum");

    // send image to browser
    header('Content-Type: image/png');
    imagepng($dst_image);
?>