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Clarify (lack of) support for desktop OpenGL on the Raspberry Pi

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gabomdq committed Oct 21, 2014
1 parent 5f193f0 commit 96fd9cefc8d8f3ae97ba78d9c6216591641f8da0

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@@ -150,6 +150,23 @@ this determining the CAPS LOCK behavior:

sudo dpkg-reconfigure locales

================================================================================
OpenGL problems
================================================================================

If you have desktop OpenGL headers installed at build time in your RPi or cross
compilation environment, support for it will be built in. However, the chipset
does not actually have support for it, which causes issues in certain SDL apps
since the presence of OpenGL support supersedes the ES/ES2 variants.
The workaround is to disable OpenGL at configuration time:

./configure --disable-video-opengl

Or if the application uses the Render functions, you can use the SDL_RENDER_DRIVER
environment variable:

export SDL_RENDER_DRIVER=opengles2

================================================================================
Notes
================================================================================

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