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Bug 1620

Summary: SDL_GL_ExtensionSupported() needs to use glGetStringi() in 3.2 Core Profile
Product: SDL Reporter: Ryan C. Gordon <icculus>
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P1 CC: llxxnntt
Version: HG 2.0   
Hardware: All   
OS: All   

Description Ryan C. Gordon 2012-10-10 20:44:29 UTC 
OpenGL 3.0 added a glGetStringi() entry point that lets you get individual elements of a string. So you can iterate over glGetStringi(GL_EXTENSIONS, i) to get each extension name individually, instead of parsing the whole whitespace-delimited string the usual way.

The OpenGL 3.2 Core Profile removed the usual way, so you have to use glGetStringi() with such a GL context.

Therefore SDL_GL_ExtensionSupported() will need to use this approach in the appropriate cases.


Example of the 3.0 method:

http://hg.icculus.org/icculus/mojoshader/file/c383aebc9f13/mojoshader_opengl.c#l1096

--ryan.
Comment 1 Sam Lantinga 2013-05-21 03:00:46 UTC 
Ryan, can you take care of this for the SDL 2.0 release?  This is an important fix for anyone using the SDL API with a 3.2 core profile.
Comment 2 Ryan C. Gordon 2013-05-22 01:31:59 UTC 
(In reply to comment #1)
> Ryan, can you take care of this for the SDL 2.0 release?  This is an
> important fix for anyone using the SDL API with a 3.2 core profile.

Fixed in hg changeset 5b35f3e503c4.

--ryan.
Comment 3 Ryan C. Gordon 2013-07-12 11:52:48 UTC 
*** Bug 1510 has been marked as a duplicate of this bug. ***