Apple capability matrix updated for MacOS 10.7

[Groovounet]

I hope nobody had the weird idea on invest in a MacBook using a HD3000 because you are stock to OpenGL 2.1.

http://developer.apple.com/graphicsi...1070_Core.html

I seems that Apple choice was to build a new drivers, only running OpenGL 3.2. There are extensions but none which are part of the OpenGL 3.2 core profile. Clear and nice cut.

[Alfonse Reinheart]

That's highly annoying. No explicit attributes. No texture_sRGB (needed to have S3TC with sRGB). It's better than it was, but not as good as it ought to be.

[feelgood]

Both EXT_texture_sRGB and ARB_framebuffer_sRGB are supported under GL 3.2 (through the core API path)
as well as GL 2.x (via extensions on supported renderers) on this platform.

[Alfonse Reinheart]

EXT_texture_sRGB contains enums for DXT compressed sRGB textures. Which are most assuredly not supported via core 3.2. Go ahead, check the spec; you won't find GL_COMPRESSED_SRGB_S3TC_DXT1 anywhere in the specification.

So effectively, they took out support for sRGB S3TC compressed textures.

[arekkusu]

sRGB DXT formats are still supported. They're in the gl3ext.h and they work.

[Alfonse Reinheart]

sRGB DXT formats are still supported. They're in the gl3ext.h and they work.

And since no extension is advertised for it, and it's not part of core, it is therefore a driver bug that it works. Calling glCompressedTexImage2D with GL_COMPRESSED_SRGB_S3TC_DXT1_EXT as the internal format should give a GL_INVALID_ENUM error.

[malexander]

According to this article, GL4.1 on OSX might not be too far away (see "OpenGL 3.2", about halfway down) -- at least for recent AMD and Nvidia equipped systems, that is. The fact that the new Macbook Airs only have Intel GPUs is a little disappointing on this front. Two steps forward, one back

[Groovounet]

Define "not too far away"

More seriously, it takes time to write drivers and I can't picture OpenGL 4.1 on mac in even a year... but I wish!

[Alfonse Reinheart]

I trust the guys at ArsTech, so if they say it isn't too far away, I'm willing to buy it.

However, that says nothing about EXT_texture_sRGB and compressed sRGB textures.

The fact that the new Macbook Airs only have Intel GPUs is a little disappointing on this front.

The thing is, Intel's HD3000 GPU can handle OpenGL 3.2. Or 3.3. There's no reason it can't. The only reason they seem stuck at 3.1 is because Intel sucks. I would have thought that if anyone could force Intel to write functioning drivers, it would be Apple.

I guess some things are beyond even Steve Jobs. Or maybe Intel is upset about that whole "we're making fat loads of cash off ARM chips with iOS!" thing...

[Zenja]

The weirdest puzzle is why 3.2 and not 3.3, since there isn't any hardware requirement between them. 3.3 allows the shaders to use in/inout/out instead of attribute/varying/uniform keywords, which is exactly what we need for OpenGL ES 2.0. So we're still stuck using 2 different shaders, or using definitions to get GLSL keywords.