note 29770 deleted from function.imagettfbbox by didou

Note Submitter: nprice@tesseract.NoSpam.net ---- In the code provided by skhanna at csc dot tntech dot edu to find the height and width of the bounding-box returned by imagettfbox() I found a fencepost error while running the resulting graphic through my image editor. Thus, the code should be: $bbox = Imagettfbbox($fontsize,0,$font,$string) ; $width = ( ($bbox[0] > 0 && $bbox[2] > 0) || ($bbox[0] < 0 && $bbox[2] < 0) ) ? abs($bbox[2] - $bbox[0]) : ( abs($bbox[2]) + abs($bbox[0]) +1 ); $height = ( ($bbox[1] > 0 && $bbox[5] > 0) || ($bbox[1] < 0 && $bbox[5] < 0) ) ? abs($bbox[1] - $bbox[5]) : ( abs($bbox[1]) + abs($bbox[5]) +1 ); Why? An example: Lets say that to find the height, we use the lower left Y coordinate and the upper right Y coordinate. Lets say that imagegettfbbox() returns the following values: $bbox[1] => 2 #lower left Y coord. $bbox[5] => -15 #upper right Y coord. That means that from the baseline, it extends 2 pixels below, and 15 pixels above it, right? Wrong. It actually extends 3 pixels below (or 16 above, depending how you want to look at it), because the math above fails to account for the '0th' pixel at Y-coord 0. At least, that's what I observed. So, if you're wondering why your text gets clipped or positioned wrong by 1 pixel, hopefully this will give you a clue.