Review Request 128426: Support OpenGL 3.2 Core profile in FadingNode shaders

[Aleix Pol Gonzalez]

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Looks like an interesting optimization oportunity! :)


src/declarativeimports/core/fadingnode.cpp (line 67)
<https://git.reviewboard.kde.org/r/128426/#comment65692>

    use `switch`?


- Aleix Pol Gonzalez


On July 12, 2016, 1:34 a.m., David Edmundson wrote:
> 
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> https://git.reviewboard.kde.org/r/128426/
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> (Updated July 12, 2016, 1:34 a.m.)
> 
> 
> Review request for KDE Frameworks and Plasma.
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> Repository: plasma-framework
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> 
> Description
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> Qt has two shaders for all items; one for when running OpenGL3.2+ without backwards compatibility (i.e running CoreProfile) and one that supports more legacy systems. (see
> the shaders directory and the versions ending with _core)
> 
> core profile is only used if explicitly by the app enabled when creating the GL context. 
> 
> Something we don't currently do in Plasma, but a 3d party user could be doing.
> 
> Long term it's also something I want to do in Plasma optionally as it gives a 15Mb memory saving with Mesa.
> 
> This patch updates our material to provide the right shader for the
> given version matching the behavior of
> QSGShaderSourceBuilder::resolveShaderPath which Qt uses internally.
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> 
> Diffs
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>   src/declarativeimports/core/fadingnode.cpp 88b7310641f58c2b74fe61d2c5a97847cf7dc3b8 
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> Diff: https://git.reviewboard.kde.org/r/128426/diff/
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> 
> Testing
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> ran krunner with 
> +    QSurfaceFormat format;
> +    format.setVersion(3,2);
> +    format.setProfile(QSurfaceFormat::CoreProfile);
> +    QSurfaceFormat::setDefaultFormat(format);
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> and it still works.
> 
> plasmashell unchanged (so still requesting an GL 2.0 context) also still works.
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> 
> Thanks,
> 
> David Edmundson
> 
>

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