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"SGIS_texture_edge_clamp unavailable" but "GL_EXT_texture_edge_clamp: OK" #880
Many people seem to be getting this warning now. And I have indeed noticed artifacts along texture edges, but the same happened in older versions. As I understand it, the problem was always there, just that the warning message appeared only in SFML 2.3.
I have this on an old NVIDIA graphics card, other people reported the same on new ones.
And the thing is...
glewinfo | grep texture_edge_clamp
Some graphics cards seem to have this feature under a different name. It may be worth adding a fallback like this.
Hmm... I guess Nvidia doesn't think it makes sense to expose the same extension under its aliases like everybody else does. Will fix.
It definitely wasn't always there, because there was never a problem.
This "issue" has only became apparent now after we added support for hardware that doesn't support texture edge clamping, because I guess not many people with Nvidia cards have tested/reported the issue after the commit got merged.
added a commit
May 10, 2015
Should be fixed in https://github.com/SFML/SFML/tree/bugfix/ext_texture_edge_clamp.