[PyQt] Include software rendering and HLSL compiler in the PyQt5 wheels for Windows

[Phil Thompson]

On 6 Jun 2018, at 11:21 pm, Cody Scott <cody at perspexis.com> wrote:
> 
> Okay I have learned that dynamic OpenGL means that at runtime Qt will determine which OpenGL implementation to use.
> 
> If OpenGL >= 2.0 is not available it will try ANGLE and if ANGLE is not available it will use a software renderer[0].
> 
> These three files are required for ANGLE to work.
> 
> • libEGL.dll
> • libGLESv2.dll
> • d3dcompiler_XX.dll
> 
> libEGL.dll and libGLESv2.dll are already being included in the wheels.
> 
> Without allowing Qt to fallback to the software renderer (opengl32sw.dll) I tried adding the d3dcompiler_47.dll from my Qt 5.10.1 msvc2015 directory but the application would not work.
> 
> Failed to load libEGL (The specified module could not be found.)
> QWindowsEGLStaticContext::create: Failed to load and resolve libEGL functions
> 
> Hey Phil, which msvc directory do you copy the .dlls from when building the wheels?

The only msvc files copied are...

msvcp140.dll
concrt140.dll
vcruntime140.dll

Phil