Edit report at http://bugs.php.net/bug.php?id=53598&edit=1
ID: 53598 User updated by: the-ninth at gmx dot com Reported by: the-ninth at gmx dot com Summary: GD does not support color profiles -Status: Feedback +Status: Assigned Type: Feature/Change Request Package: GD related Operating System: Irrelevant PHP Version: Irrelevant Assigned To: pajoye Block user comment: N Private report: N New Comment: Sorry, should be back now. I added one more: http://www.the-ninth.com/demo/demo_phpim.jpg This one was re-sized with ImageMagick, which retains the color profile. Cheers, Robert Previous Comments: ------------------------------------------------------------------------ [2010-12-26 19:22:25] [email protected] Can you restore the links please? 404 now ------------------------------------------------------------------------ [2010-12-24 01:11:27] the-ninth at gmx dot com Hi, Try this one: http://www.the-ninth.com/demo/demo_php_argb.jpg http://www.the-ninth.com/demo/demo_lightroom_argb.jpg It was generated in AdobeRGB color space and the profile was removed during resizing. I assume that your Firefox should display it differently, because for the one from Lightroom it knows that it is AdobeRGB while for the one from PHP/GD it will fall back to sRGB. But in any case, the essence is that color profiles are a part of images and at least some current browsers rely on this information. At the moment it is FF and Safari, and IE9 will have color-management too. Then the problem will affect the majority of users. So for the future it would be really helpful if GD would allow to read/write color profiles. Cheers, Robert ------------------------------------------------------------------------ [2010-12-23 15:52:56] [email protected] I think I need more visible differences as I don't have a calibration system in place nor a calibrated monitor :P I will already analyze the delta in the meta information of both images. ------------------------------------------------------------------------ [2010-12-23 15:45:06] the-ninth at gmx dot com Hi, Check these two pictures: http://www.the-ninth.com/demo/demo_php.jpg http://www.the-ninth.com/demo/demo_lightroom.jpg demo_lightroom.jpg was generated by Adobe Lightroom and contains the profile. Demo.php was generated by GD and does not contain the profile. To see the difference you need to have a system color profile that is different from sRGB, like you would have with a calibrated monitor. Then if you open them in Firefox you'll see the difference. I think Safari does color management too, so you might see the difference there as well. Maybe also IE9. If you do not have a calibrated monitor, then probably sRGB is the system default anyway, so in this case Firefox takes sRGB for the picture without the profile and the result is correct. Thanks, Robert ------------------------------------------------------------------------ [2010-12-23 15:37:47] [email protected] hi, Can you send me a couple of images with the profile(s) you are referring to please? ------------------------------------------------------------------------ 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/bug.php?id=53598 -- Edit this bug report at http://bugs.php.net/bug.php?id=53598&edit=1
