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README-windows: Convert to actual Markdown text.

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@ -1,12 +1,10 @@
Windows # Windows
================================================================================
================================================================================ ## OpenGL ES 2.x support
OpenGL ES 2.x support
================================================================================
SDL has support for OpenGL ES 2.x under Windows via two alternative SDL has support for OpenGL ES 2.x under Windows via two alternative
implementations. implementations.
The most straightforward method consists in running your app in a system with 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 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 which supports the WGL_EXT_create_context_es2_profile extension. Vendors known
@ -16,15 +14,14 @@ The other method involves using the ANGLE library (https://code.google.com/p/ang
If an OpenGL ES 2.x context is requested and no WGL_EXT_create_context_es2_profile 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 extension is found, SDL will try to load the libEGL.dll library provided by
ANGLE. ANGLE.
To obtain the ANGLE binaries, you can either compile from source from To obtain the ANGLE binaries, you can either compile from source from
https://chromium.googlesource.com/angle/angle or copy the relevant binaries 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: a recent Chrome/Chromium install for Windows. The files you need are:
* libEGL.dll - libEGL.dll
* libGLESv2.dll - libGLESv2.dll
* d3dcompiler_46.dll (supports Windows Vista or later, better shader compiler) - d3dcompiler_46.dll (supports Windows Vista or later, better shader compiler) *or* d3dcompiler_43.dll (supports Windows XP or later)
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 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). d3dcompiler_* DLL at all (for details on this, see their documentation).
@ -35,11 +32,10 @@ SDL_HINT_VIDEO_WIN_D3DCOMPILER hint (see SDL_hints.h for more details).
Known Bugs: Known Bugs:
* SDL_GL_SetSwapInterval is currently a no op when using ANGLE. It appears - 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 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. refreshing if this is set to anything other than the default value.
Vulkan Surface Support ## Vulkan Surface Support
==============
Support for creating Vulkan surfaces is configured on by default. To disable it change the value of `SDL_VIDEO_VULKAN` to 0 in `SDL_config_windows.h`. You must install the [Vulkan SDK](https://www.lunarg.com/vulkan-sdk/) in order to use Vulkan graphics in your application. Support for creating Vulkan surfaces is configured on by default. To disable it change the value of `SDL_VIDEO_VULKAN` to 0 in `SDL_config_windows.h`. You must install the [Vulkan SDK](https://www.lunarg.com/vulkan-sdk/) in order to use Vulkan graphics in your application.