Bug #65171 [Asn->Csd]: imagescale() fails

Edit report at https://bugs.php.net/bug.php?id=65171&edit=1 ID: 65171 Updated by: remi@php.net Reported by: susisoy at 163 dot com Summary: imagescale() fails -Status: Assigned +Status: Closed Type: Bug Package: GD related Operating System: CentOS 6.4 PHP Version: 5.5.0 Assigned To: remi Block user comment: N Private report: N New Comment: Automatic comment on behalf of remi Revision: http://git.php.net/?p=php-src.git;a=commit;h=2728e6f01798b1146b41587d38bf84cdf9988d17 Log: Fixed Bug #65171 imagescale() fails Previous Comments: ------------------------------------------------------------------------ [2014-10-15 16:58:53] richard at sublogic dot se After talking with RemiFedora at #libgd on IRC at irc.freenode.net I got the following workaround: Specify an explicit height for imagescale(). My system which showed the problem: Archlinux PHP Version 5.6.1 array (size=12) 'GD Version' => string '2.1.0-alpha' (length=11) 'FreeType Support' => boolean true 'FreeType Linkage' => string 'with freetype' (length=13) 'T1Lib Support' => boolean false 'GIF Read Support' => boolean true 'GIF Create Support' => boolean true 'JPEG Support' => boolean true 'PNG Support' => boolean true 'WBMP Support' => boolean true 'XPM Support' => boolean true 'XBM Support' => boolean true 'JIS-mapped Japanese Font Support' => boolean false ------------------------------------------------------------------------ [2014-10-15 16:50:58] remi@php.net Despite document says third arg (height) is optional, it is, for now, mandatory. ------------------------------------------------------------------------ [2013-12-31 16:04:42] matteosistisette at gmail dot com It looks like this function is just some kind of draft (there's a warning in the documentation saying it's not documented), recently introduced. If it's not intended to be used and it's still not functional, it should either be made invisible until it's usable, or an alternative should be mentioned in the documentation. Having to find out that it's completely broken by using it after finding it in the documentation is terribly annoying. ------------------------------------------------------------------------ [2013-07-01 07:50:31] susisoy at 163 dot com Description: ------------ imagescale() function cannot be used. Test script: --------------- <?php $im = imagecreatefrompng('1.png'); $im2 = imagescale($im, 100); imagepng($im2); Expected result: ---------------- Warning: imagescale(): gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully in /mnt/hgfs/F/Test/index.php on line 3 Warning: imagepng() expects parameter 1 to be resource, boolean given in /mnt/hgfs/F/Test/index.php on line 4 Actual result: -------------- ... ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65171&edit=1