Bug #79068 [NEW]: gdTransformAffineCopy() changes interpolation method

From: cmb Operating system: * PHP version: 7.3Git-2020-01-06 (Git) Package: GD related Bug Type: Bug Bug description:gdTransformAffineCopy() changes interpolation method Description: ------------ See <https://github.com/libgd/libgd/issues/585>. Test script: --------------- <?php $src = imagecreatetruecolor(100, 100); imagefilledrectangle($src, 0, 0, 99, 99, 0xffffff); imageline($src, 10, 10, 90, 90, 0x000000); imagesetinterpolation($src, IMG_BSPLINE); $dst1 = imagerotate($src, 80, 0xffffff); imagepng($dst1, 'rot_exp.png'); imageaffine($src, [1, 1, 1, 1, 1, 1]); $dst2 = imagerotate($src, 80, 0xffffff); imagepng($dst2, 'rot_act.png'); Expected result: ---------------- both images are identical Actual result: -------------- both images are similar, but not identical -- Edit bug report at https://bugs.php.net/bug.php?id=79068&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79068&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79068&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79068&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79068&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79068&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79068&r=support Expected behavior: https://bugs.php.net/fix.php?id=79068&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79068&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79068&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79068&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79068&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79068&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79068&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79068&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79068&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79068&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79068&r=mysqlcfg