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64463f4556
My expectation was that all toggles were disabled with OpenGL. But the specification states: "The initial value for each capability with the exception of GL_DITHER is GL_FALSE. The initial value for GL_DITHER is GL_TRUE." The kind of dithering is implementation dependent and our layered OpenGL implementations choose to do nothing when this is enabled (unless extensions like VK_EXT_legacy_dithering are supported). Since, again, per the spec: "As far as OpenGL layering is concerned, no dithering is technically an acceptable algorithm". But it does have a cost of older hardware where dithering is supported. This sets the default to match our other backends and get some performance on hardware that does do dithering.