sdl2_frt/docs/README-windows.md

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.
     
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.
vulkan: Initial Vulkan support! This work was done by Jacob Lifshay and Mark Callow; I'm just merging it into revision control. 2017-08-28 04:15:57 +02:00			`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.`

			`Vulkan Surface Support`
			`==============`

Be clear that disabling Vulkan surface support disables the entire SDL Vulkan integration 2017-08-28 09:11:38 +02:00			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.