Bug #53154 [NEW]: Zero-height rectangle has whiskers

From: Operating system: Linux PHP version: 5.3.3 Package: GD related Bug Type: Bug Bug description:Zero-height rectangle has whiskers Description: ------------ Using imagerectangle() to draw a rectangle that happens to have zero height results in a horizontal line with small 'whiskers' at the ends. The whiskers extend up and down 1 pixel from the line. This looks weird. This only happens with unit line thickness. It does not happen with zero width rectangles, nor with imagefilledrectangle(). Note: Using PHP-bundled GD library. Test script: --------------- <?php $img = imagecreate(400, 200); $white = imagecolorallocate($img, 255, 255, 255); $black = imagecolorallocate($img, 0, 0, 0); $red = imagecolorallocate($img, 255, 0, 0); imagestring($img, 4, 5, 5, "RECTANGLES", $black); imagestring($img, 4, 150, 5, "Filled", $black); imagestring($img, 4, 300, 5, "Unfilled", $black); imagestring($img, 4, 5, 75, "Height=0", $black); imagestring($img, 4, 5, 145, "Width=0", $black); imagefilledrectangle($img, 150, 95, 200, 95, $black); imagerectangle($img, 300, 95, 350, 95, $black); imagefilledrectangle($img, 175, 125, 175, 175, $black); imagerectangle($img, 325, 125, 325, 175, $black); imageellipse($img, 325, 95, 90, 50, $red); // Circle the bad one imagepng($img); Expected result: ---------------- In all 4 cases, a single line should be drawn. Actual result: -------------- The upper right case (zero height, unfilled rectangle) has whiskers at the ends. -- Edit bug report at http://bugs.php.net/bug.php?id=53154&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53154&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53154&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53154&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53154&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53154&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53154&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53154&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53154&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53154&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53154&r=support Expected behavior: http://bugs.php.net/fix.php?id=53154&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53154&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53154&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53154&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53154&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53154&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53154&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53154&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53154&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53154&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53154&r=mysqlcfg