Give a choice to use OpenGL ES (ANGLE) on Windows

[techtonik]

Reticketed from #3632.

OpenGL really suxx on my hardware (just 5 years old notebook) and I want to play with Godot. I had some success making it run with regal by @nigels-com, but it is still too slow.

Chrome uses OpenGL ES for WebGL and it works ok through ANGLE library. Firefox uses it too.

Ideally, it should be possible to select ANGLE renderer with command line.

[reduz]

The amount of people with your hardware is reaaally small and will keep
decreasing. It doesn't make much sense to do all this work to support it.

On Tue, Feb 9, 2016 at 11:51 AM, anatoly techtonik <notifications@github.com

wrote:

Reticketed from #3632 #3632.

OpenGL really suxx on my hardware (just 5 years old notebook) and I want
to play with Godot. I had some success making it run with regal
https://github.com/p3/regal by @nigels-com
https://github.com/nigels-com, but it is still too slow.

Chrome uses OpenGL ES for WebGL and it works ok through ANGLE
https://en.wikipedia.org/wiki/ANGLE_(software) library. Firefox uses it
too.

Ideally, it should be possible to select ANGLE renderer with command line.

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#3634.

[techtonik]

How much work exactly and what is this work? Generate stubs for dynamic linking. Is that all?

[techtonik]

The amount of people with hardware may be small, but OpenGL support in Windows drivers is much worse for a bigger audience. That's why Google decided to create ANGLE and translate calls into DirectX. This will at least benefit Godot performance on this platform.

[punto-]

I think the way to do this is making a gl_context that uses egl (there's
one in the winrt port, but uses some windows 8 specific stuff, it shouldn't
be too hard to make one for normal windows), then get angle to compile
inside our tree. The rest should work normally, angle provides the egl and
gles headers, so you have to tell the rasterizer to include those (instead
of the desktop gl ones, or glew)

I don't know if dynamic linking with stubs works because angle is gles and
godot on pc is desktop gl.

On 9 February 2016 at 15:23, anatoly techtonik notifications@github.com
wrote:

How much work exactly and what is this work? Generate stubs for dynamic
linking. Is that all?

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#3634 (comment).

[techtonik]

It would be much-much clearer is somebody could draw diagrams. =/ regal somehow does all the hard stuff of dynamic linking for many OpenGL features and even opens web port with debug info, but I have no idea what Godot requires on its side. I guess I need to get that compiled first to see.

[punto-]

Since we got kicked out of the other issue :p, here's a link to a 32 bit
build with ANGLE:

http://op.godotengine.org:81/godot.windows.tools.angle.32.exe

(it's new, I made it with the 32 bit cmd prompt this time) we need people
with the intel cards where normal godot fails to test it, also check if you
have "d3dcompiler_47.dll" on your system, the Angle people tell me this is
what's causing the "failed to create d3d shaders" error.
Also try this on chrome on the same computer:

http://tof.p1x.in/html5/

It's a game exported to html5, chrome supposedly uses the same Angle code,
so if it works there it should work on ours.

On 9 February 2016 at 16:53, anatoly techtonik notifications@github.com
wrote:

It would be much-much clearer is somebody could draw diagrams. =/ regal
somehow does all the hard stuff of dynamic linking for many OpenGL features
and even opens web port with debug info, but I have no idea what Godot
requires on his side. I guess I need to get that compiled first.

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#3634 (comment).

[punto-]

Also check for the error ""No D3D compiler module found - aborting!\n", or
similar, anything from this function
https://github.com/punto-/godot/blob/angle/drivers/angle/libANGLE/renderer/d3d/HLSLCompiler.cpp#L109

On 20 February 2016 at 13:50, Ariel Manzur ariel@godotengine.org wrote:

Since we got kicked out of the other issue :p, here's a link to a 32 bit
build with ANGLE:

http://op.godotengine.org:81/godot.windows.tools.angle.32.exe

(it's new, I made it with the 32 bit cmd prompt this time) we need people
with the intel cards where normal godot fails to test it, also check if you
have "d3dcompiler_47.dll" on your system, the Angle people tell me this is
what's causing the "failed to create d3d shaders" error.
Also try this on chrome on the same computer:

http://tof.p1x.in/html5/

It's a game exported to html5, chrome supposedly uses the same Angle code,
so if it works there it should work on ours.

On 9 February 2016 at 16:53, anatoly techtonik notifications@github.com
wrote:

It would be much-much clearer is somebody could draw diagrams. =/ regal
somehow does all the hard stuff of dynamic linking for many OpenGL features
and even opens web port with debug info, but I have no idea what Godot
requires on his side. I guess I need to get that compiled first.

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#3634 (comment)
.

[techtonik]

Current output is below. There is no system-wide d3dcompiler_47.dll so I am going to steal one from Chrome.

...
S3TC: 1 ATITC: 0
ERROR: ShaderGLES2::get_current_version: CanvasShaderGLES2: Program LINK FAILED:
Failed to create D3D shaders.

   At: drivers\gles2\shader_gles2.cpp:544
ERROR: ShaderGLES2::get_current_version: Method/Function Failed, returning: 0
   At: drivers\gles2\shader_gles2.cpp:551
ERROR: ShaderGLES2::bind: Condition ' !version ' is true. returned: false
   At: drivers\gles2\shader_gles2.cpp:126
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354
ERROR: ShaderGLES2::_get_uniform: Condition ' !version ' is true. returned: -1
   At: C:\msys\1.0\home\ariel\godot-angle\drivers/gles2/shader_gles2.h:354

[techtonik]

Copying d3dcompiler_47.dll from Chrome makes it work. =) Even faster than with regal.

[punto-]

Ok.. so apparently you can have direct x but not have this mysterious dll..
I guess that's a solution for these old cards then, if they get this dll
with the .exe..

On 24 February 2016 at 09:24, anatoly techtonik notifications@github.com
wrote:

Copying d3dcompiler_47.dll from Chrome makes it work. =) Even faster than
with regal.

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#3634 (comment).

[techtonik]

There a lot of copies of this .dll with installed apps, but nothing system-wide.

[techtonik]

Now the problem is:

drivers\angle\libANGLE\renderer\d3d\d3d11\win32\NativeWindow.cpp:15:19: fatal error: dcomp.h: No such file or directory

Now looking how to disable D3D11 in https://groups.google.com/d/topic/angleproject/4O00UBCP3T8/discussion

[techtonik]

For now I am trying to remove files mentioned in D3D11 option in https://chromium.googlesource.com/angle/angle/+/master/src/libGLESv2.gypi

[techtonik]

Now I am trying to workaround with -msse flag after an error mentioned in http://stackoverflow.com/questions/31846389/why-do-i-get-this-compile-error-with-gcc-5-and-cilk-plus

[techtonik]

-msse didn't work. Trying with -msse2, because the offending file is called ./libANGLE/renderer/d3d/loadimageSSE2.cpp

And here is why it appeared https://bugs.chromium.org/p/angleproject/issues/attachmentText?aid=2166

[techtonik]

It is impossible to disable D3D11 for now. Waiting for a fix https://groups.google.com/d/msg/angleproject/4O00UBCP3T8/f6DG6yhcDgAJ

[techtonik]

Fix for me to be able to run this on D3D9 is in the process - https://chromium-review.googlesource.com/#/c/336780/

[techtonik]

Fix committed. Need to update ANGLE sources and try again https://bugs.chromium.org/p/angleproject/issues/detail?id=1345

[techtonik]

Working on this.. Got stuck in Google workflow tools.

[punto-]

What are the current issues? I remember a couple of the demos don't work,
but they also fail the same way in the html5 export

On 28 May 2016 at 01:52, anatoly techtonik notifications@github.com wrote:

Working on this.. Got stuck in Google workflow tools.

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[techtonik]

@punto- I need to update ANGLE the code to tell about current issues, because it needs to run on DirectX 9 for MinGW gcc that I've got on my Vista. So far I am trying to figure out which files to copy there.

[techtonik]

@punto- can you rebase your branch on top of current master? I've got some merge conflicts that I am unable to resolve.

[techtonik]

Closing this to restart from scratch with new information in #6726