On 19 June 2015 at 00:07, Matteo Bruni mbruni@codeweavers.com wrote:
Using the GLSL shader backend implies GLSL vp and fp replacements,
An argument could perhaps be made that it should, but currently that's not true. You can still use the the GLSL shader backend with e.g. fixed function fragment processing with some level of success. The only reason it doesn't happen much in practice is the way select_vertex_implementation() and select_fragment_implementation() are implemented, but that's external to the shader backend.
2015-06-19 11:06 GMT+02:00 Henri Verbeet hverbeet@gmail.com:
On 19 June 2015 at 00:07, Matteo Bruni mbruni@codeweavers.com wrote:
Using the GLSL shader backend implies GLSL vp and fp replacements,
An argument could perhaps be made that it should, but currently that's not true. You can still use the the GLSL shader backend with e.g. fixed function fragment processing with some level of success. The only reason it doesn't happen much in practice is the way select_vertex_implementation() and select_fragment_implementation() are implemented, but that's external to the shader backend.
That's true. It's likely I need to enforce it at some point though, at least for core profile. Actually using non-GLSL vp with the GLSL shader backend is already broken by some of my latest changes in set_glsl_shader_program(). I can fix that part but I'm not sure there aren't other blockers after it. I guess I'll look into adding some mechanism to the shader backends for accepting or rejecting vp and fp implementations, or something along those lines.
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Am 2015-06-19 um 11:06 schrieb Henri Verbeet:
You can still use the the GLSL shader backend with e.g. fixed function fragment processing with some level of success.
The level success with that is quite high actually. I use this to test the nvts / nvrc backends when I touch something that might have an impact there. I prefer to keep unexpected mixes of shader / vertex / fragment pipelines working.
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Henri Verbeet -
Matteo Bruni -
Stefan Dösinger