mirror of
https://github.com/Relintai/sdl2_frt.git
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24c86b5501
since the window system doesn't do it for us like other platforms. This prevents sticky keys and missed keys when going in and out of focus, for example Alt would appear to stick if switching away from an SDL app with Alt-Tab and had to be pressed again. CR: Sam
42 lines
2.0 KiB
Markdown
42 lines
2.0 KiB
Markdown
Windows
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================================================================================
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================================================================================
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OpenGL ES 2.x support
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================================================================================
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SDL has support for OpenGL ES 2.x under Windows via two alternative
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implementations.
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The most straightforward method consists in running your app in a system with
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a graphic card paired with a relatively recent (as of November of 2013) driver
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which supports the WGL_EXT_create_context_es2_profile extension. Vendors known
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to ship said extension on Windows currently include nVidia and Intel.
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The other method involves using the ANGLE library (https://code.google.com/p/angleproject/)
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If an OpenGL ES 2.x context is requested and no WGL_EXT_create_context_es2_profile
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extension is found, SDL will try to load the libEGL.dll library provided by
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ANGLE.
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To obtain the ANGLE binaries, you can either compile from source from
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https://chromium.googlesource.com/angle/angle or copy the relevant binaries from
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a recent Chrome/Chromium install for Windows. The files you need are:
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* libEGL.dll
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* libGLESv2.dll
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* d3dcompiler_46.dll (supports Windows Vista or later, better shader compiler)
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or...
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* d3dcompiler_43.dll (supports Windows XP or later)
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If you compile ANGLE from source, you can configure it so it does not need the
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d3dcompiler_* DLL at all (for details on this, see their documentation).
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However, by default SDL will try to preload the d3dcompiler_46.dll to
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comply with ANGLE's requirements. If you wish SDL to preload d3dcompiler_43.dll (to
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support Windows XP) or to skip this step at all, you can use the
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SDL_HINT_VIDEO_WIN_D3DCOMPILER hint (see SDL_hints.h for more details).
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Known Bugs:
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* SDL_GL_SetSwapInterval is currently a no op when using ANGLE. It appears
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that there's a bug in the library which prevents the window contents from
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refreshing if this is set to anything other than the default value.
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