2014-07-29 14:20:12 +02:00
|
|
|
Windows
|
2014-04-10 03:29:19 +02:00
|
|
|
================================================================================
|
|
|
|
|
|
|
|
|
|
================================================================================
|
|
|
|
|
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.
|
|
|
|
|
|
