Update GLSL uniforms (glshader element)

[Yu You]

Hi,

There's a way to modify uniform variables for the glshader element.
The following is an example of changing simple value types like float.


    uniforms = Gst.Structure.new_empty("uniforms")
    u1 = GObject.Value(GObject.TYPE_FLOAT)
    u1.set_float(hdegree)
    uniforms.set_value("u1", u1)
    shader.set_property("uniforms", uniforms)
    uniforms.free()

But it is common in GLSL shader we use data types like Vec2/Vec3.
The following code did not work.
    v1 = Graphene.Vec2()
    v1.init(0.5,0.5)
    uniforms.set_value("v1", v1)

Should I create GObject.Value() with GObject.TYPE_?? for Graphene.Vec2?
How to set the  Graphene.Vec2 object to the GObject.Value?

Thanks.

Regards,

Yu
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