ID: 37730 Comment by: lbayuk at pobox dot com Reported By: marc dot lazzaro at st dot com Status: No Feedback Bug Type: GD related Operating System: Win XP PHP Version: 5.1.4 Assigned To: pajoye New Comment:
I am also finding that the TrueType font bounding box from ImageTTFBBox and ImageTTFText seems to be wrong for text at angles other than 0 degrees. Using PHP-5.2.4 on Linux. My test script just draws the returned bounding box for text and angles from 0 to 360. It shows that for text at 0 degrees, the box encloses the text, but for all other angles the box is off by different amounts. The worst case is for text between 180 and 270 degrees, where the text is completely outside the bounding box. My test script is about 50 lines long, and I would be happy to post or mail it but I'm not sure what is correct. Let's not abandon this bug report until we figure out whether PHP is at fault or we are using it wrong. Previous Comments: ------------------------------------------------------------------------ [2007-03-09 01:00:00] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2007-03-01 12:00:29] hopka at hopka dot net The font is standard Arial, the ttf i use is here: http://hopka.net/Arial.ttf However, i did try other fonts and i could not find any font that produced different results. ------------------------------------------------------------------------ [2007-03-01 11:45:44] [EMAIL PROTECTED] "so i don't see how i should rotate the offset to get the correct bounding box." Your script is wrong, you add 100 to each vertex, no matter where they are. The result rectangle is then drawn at the wrong place. About the offset pixel, what I asked here remains. Please provide the font as well. ------------------------------------------------------------------------ [2007-03-01 11:40:15] hopka at hopka dot net If i draw the box that imagettftext (sorry, did not try that before) returns without modifying the coordinates, it is almost (1 pixel off) the same as the box i get after adding 100 to each coordinate of imagettfbbox' return value. That would mean that either imagettftext is also wrong (because it produces the same results as my script) or that one would also have to modify the coordinates returned by imagettftext. Also, the rectangles returned by both functions are already rotated, so i don't see how i should rotate the offset to get the correct bounding box. ------------------------------------------------------------------------ [2007-03-01 00:14:13] [EMAIL PROTECTED] "I made a little demonstration script (includes source + phpinfo): http://hopka.net/imagettfbbox.php5"; Your script is wrong, you forgot that each position is relative to the origin of the text. Adding 100 to each of them is not correct. You have to rotate the offset. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/37730 -- Edit this bug report at http://bugs.php.net/?id=37730&edit=1
