[vbox-dev] Chromium WebGL vs Angle WebGL

Michael Thayer michael.thayer at oracle.com
Mon Apr 29 11:49:58 PDT 2013


Hello Michael,

Perhaps I am missing something here, but first I have trouble seeing 
what ANGLE should provide which we are currently lacking (in fact I am 
not quite sure what you feel is wrong with our current solution at all 
which cannot be fixed in place), and secondly it looks from its web page 
like a Windows-only library to run OpenGL ES on top of DirectX rather 
than a cross-platform one to translate DirectX into WebGL.  I am not 
even quite clear either why you think we need such a library - are you 
considering Windows guests being displayed in a host web browser?  And 
if so, do you think that ANGLE would be suitable for being embedded into 
a guest display driver?

Regards,

Michael

On 29/04/13 19:09, Michael Slavitch wrote:
> In other words, it's an open-source library that can do for VirtualBox
> what Mesa/Gallium3D does for VMWare: Present a consistent OpenGL 3D
> library no matter the underlying platform.  It has a BSD license.
>
>
> On Mon, Apr 29, 2013 at 12:49 PM, Michael Slavitch <slavitch at gmail.com> wrote:
>> The latter is what's used in Oracle VirtualBox to provide WebGL
>> services to pass graphics commands to the host.
>>
>> That's what Angle provides, as a library, for applications that can
>> use it, and for the same reason, as it allows the same library to
>> offer near-native graphics support cross-platform, such that DirectX
>> API commands can be translated into WebGL calls supported on myriad
>> platforms.  They support translation of DirectX 9 and DirectX 10.
>>
>>
>>
>> On Mon, Apr 29, 2013 at 12:42 PM, Michael Slavitch <slavitch at gmail.com> wrote:
>>> The latter is what's used in Oracle VirtualBox to provide WebGL
>>> services, correct?  That's what Angle provides, as a library, for
>>> applications that can use it.
>>>
>>>
>>>
>>>
>>> On Mon, Apr 29, 2013 at 12:13 PM, Michael Thayer
>>> <michael.thayer at oracle.com> wrote:
>>>> Hello Michael,
>>>>
>>>> I think you have the wrong Chromium there[1][2].
>>>>
>>>> Regards,
>>>>
>>>> Michael
>>>>
>>>> [1] http://www.chromium.org/
>>>> [2] http://chromium.sourceforge.net/
>>>>
>>>>
>>>> On 29/04/13 17:59, Michael Slavitch wrote:
>>>>>
>>>>> Has anyone investigated replacing the Chromium WebGL used in
>>>>> Virtualbox with the capabilities offered by Angle?  The result would
>>>>> give Windows guests on Linux/MacOS hosts access to
>>>>> hardware-accelerated WebGL libraries on the underlying hosts,  and
>>>>> achieve parity with host implementations when using Direct3D 10 or
>>>>> above.
>>>>>
>>>>> Deets here:
>>>>>
>>>>> https://code.google.com/p/angleproject/
>>>>>
>>>>> ANGLE is a conformant implementation of the OpenGL ES 2.0
>>>>> specification that is hardware‐accelerated via Direct3D. ANGLE
>>>>> v1.0.772 was certified compliant by passing the ES 2.0.3 conformance
>>>>> tests in October 2011. ANGLE also provides an implementation of the
>>>>> EGL 1.4 specification.
>>>>>
>>>>> ANGLE is used as the default WebGL backend for both Google Chrome and
>>>>> Mozilla Firefox on Windows platforms. Chrome uses ANGLE for all
>>>>> graphics rendering on Windows, including the accelerated Canvas2D
>>>>> implementation and the Native Client sandbox environment.
>>>>>
>>>>>>>
>>>>> Portions of the ANGLE shader compiler are used as a shader validator
>>>>> and translator by WebGL implementations across multiple platforms. It
>>>>> is used on Mac OS X, Linux, and in mobile variants of the browsers.
>>>>> Having one shader validator helps to ensure that a consistent set of
>>>>> GLSL ES shaders are accepted across browsers and platforms.
>>>>>
>>>>> The shader translator can be used to translate shaders to other
>>>>> shading languages, and to optionally apply shader modifications to
>>>>> work around bugs or quirks in the native graphics drivers. The
>>>>> translator targets Desktop GLSL, Direct3D HLSL, and even ESSL for
>>>>> native GLES2 platforms.
>>>>> <<<
>>>>>
>>>>> _______________________________________________
>>>>> vbox-dev mailing list
>>>>> vbox-dev at virtualbox.org
>>>>> https://www.virtualbox.org/mailman/listinfo/vbox-dev
>>>>>
>>>>
>>>>
>>>> --
>>>> ORACLE Deutschland B.V. & Co. KG   Michael Thayer
>>>> Werkstrasse 24                     VirtualBox engineering
>>>> 71384 Weinstadt, Germany           mailto:michael.thayer at oracle.com
>>>>
>>>> Hauptverwaltung: Riesstr. 25, D-80992 München
>>>> Registergericht: Amtsgericht München, HRA 95603
>>>> Geschäftsführer: Jürgen Kunz
>>>>
>>>> Komplementärin: ORACLE Deutschland Verwaltung B.V.
>>>> Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
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>
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-- 
ORACLE Deutschland B.V. & Co. KG   Michael Thayer
Werkstrasse 24                     VirtualBox engineering
71384 Weinstadt, Germany           mailto:michael.thayer at oracle.com

Hauptverwaltung: Riesstr. 25, D-80992 München
Registergericht: Amtsgericht München, HRA 95603
Geschäftsführer: Jürgen Kunz

Komplementärin: ORACLE Deutschland Verwaltung B.V.
Hertogswetering 163/167, 3543 AS Utrecht, Niederlande
Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697
Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher



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