Watermark on the uploaded images

Question

Hello everybody. Is it possible to add watermark to the uploaded images? I tried to make it myself, but without any result.

I wrote thiscode and added it to qa-util.image.php:

                            //watermark add-on
                            $watermarkfile = 'watermark.png';
                            $watermark = imagecreatefrompng($watermarkfile);
                            // width and height of the watermark
                            $x2 = imagesx($watermark);
                            $y2 = imagesy($watermark);
                            $wmwidth = $width - $x2 - 10;
                            $wmheight = $height - $y2 - 10;
                            imageSaveAlpha($watermark, true);
                            imagecopyresampled($image, $watermark, $wmwidth, $wmheight, 0, 0, $width, $height, $x2, $y2);

Comments

Did you find a way or solution?

Answer 1

Reference:

http://www.php.net/manual/en/image.examples-watermark.php

Method to get image data:

$blobid = "Set your blob id of image";

if(function_exists('qa_read_blob'))

  $blob = qa_read_blob($blobid);

else

  $blob = qa_db_blob_read($blobid);

$imagedata = imagecreatefromstring($blob['content']);

Comments

Thanks, I know this examples, but I can't understand where we recieving image file.
I want to know where we can get image file (not BLOB) and modify it.

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I edited answer. Ask a question a little more exactly.