<?php
require 'image_alpha.php';
$pdf = new PDF_ImageAlpha();
$pdf->AddPage();
$pdf->SetFont('Arial', '', 16);
$pdf->MultiCell(0, 8, str_repeat('Hello World! ', 180));
// A) provide image + separate 8-bit mask (best quality!)
// first embed mask image (w, h, x and y will be ignored, the image will be scaled to the target image's size)
$maskImg = $pdf->Image('mask.png', 0, 0, 0, 0, '', '', true);
// embed image, masked with previously embedded mask
$pdf->Image('image.png', 55, 10, 100, 0, '', '', false, $maskImg);
// B) use alpha channel from PNG (alpha channel converted to 7-bit by GD, lower quality)
$pdf->ImagePngWithAlpha('image_with_alpha.png', 55, 100, 100);
// C) same as B), but using Image() method that recognizes the alpha channel
$pdf->Image('image_with_alpha.png', 55, 190, 100);
$pdf->Output();