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Fixed bug 1565 - some small GL context creation enhancements
Matthias Bentrup 2012-08-09 12:53:17 PDT With OpenGL 4.3 the ARB added a new context flag for context reset isolation and renamed the existing ES2 profile bit to ES profile bit, as it can be used to request GLES 3 compatible contexts, too. This patch adds these changes to SDL on Linux and Windows. Also SDL lacks the ability to create shared contexts. This patch also adds a new GL attribute to enable context sharing. As casting a GL context to int is not portable, I added only a boolean attribute SDL_GL_SHARE_WITH_CURRENT_CONTEXT, which makes the new context share resources with the context current on the creating thread.
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