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Diffstat (limited to '3rdparty/sdl2/docs/README-windows.md')
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diff --git a/3rdparty/sdl2/docs/README-windows.md b/3rdparty/sdl2/docs/README-windows.md new file mode 100644 index 00000000000..076b1556e84 --- /dev/null +++ b/3rdparty/sdl2/docs/README-windows.md @@ -0,0 +1,41 @@ +Windows +================================================================================ + +================================================================================ +OpenGL ES 2.x support +================================================================================ + +SDL has support for OpenGL ES 2.x under Windows via two alternative +implementations. +The most straightforward method consists in running your app in a system with +a graphic card paired with a relatively recent (as of November of 2013) driver +which supports the WGL_EXT_create_context_es2_profile extension. Vendors known +to ship said extension on Windows currently include nVidia and Intel. + +The other method involves using the ANGLE library (https://code.google.com/p/angleproject/) +If an OpenGL ES 2.x context is requested and no WGL_EXT_create_context_es2_profile +extension is found, SDL will try to load the libEGL.dll library provided by +ANGLE. +To obtain the ANGLE binaries, you can either compile from source from +https://chromium.googlesource.com/angle/angle or copy the relevant binaries from +a recent Chrome/Chromium install for Windows. The files you need are: + + * libEGL.dll + * libGLESv2.dll + * d3dcompiler_46.dll (supports Windows Vista or later, better shader compiler) + or... + * d3dcompiler_43.dll (supports Windows XP or later) + +If you compile ANGLE from source, you can configure it so it does not need the +d3dcompiler_* DLL at all (for details on this, see their documentation). +However, by default SDL will try to preload the d3dcompiler_46.dll to +comply with ANGLE's requirements. If you wish SDL to preload d3dcompiler_43.dll (to +support Windows XP) or to skip this step at all, you can use the +SDL_HINT_VIDEO_WIN_D3DCOMPILER hint (see SDL_hints.h for more details). + +Known Bugs: + + * SDL_GL_SetSwapInterval is currently a no op when using ANGLE. It appears + that there's a bug in the library which prevents the window contents from + refreshing if this is set to anything other than the default value. + |