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Also adds a few things to GPUShader for easily create shaders.
Heavy usage of macros to compose the createInfo and avoid
duplications and copy paste bugs.
This makes the link between the shader request functions
(in workbench_shader.cc) and the actual createInfo a bit
obscure since the names are composed and not searchable.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D13910
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This is to be able to turn off the extension usage on demand.
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In order to use a workaround builtin uniform, we need to count it
just like other uniforms and give it some space in the name buffer.
This also fixes extensions being added after the uniform declaration.
All `#extension` directives are now part of the gl backend.
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Apply clang format as proposed in T53211.
For details on usage and instructions for migrating branches
without conflicts, see:
https://wiki.blender.org/wiki/Tools/ClangFormat
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Non-manifold geom was producing inverted result when the camera was inside
the shadow volume.
When rendering non manifold geometry with the depth fail method, we need to
emit the cap as if it was the same geometry with a virtual thickness.
Another way to view it is to imagine having a set of non-manifold geometry
all facing the light.
So for every tri we emit a front cap oriented toward the light and the
back cap pointing away from it (whatever the actual orientation of the tri).
Extrusion pass stay the same as the depth pass method (double the increment
if it's a manifold edge).
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Totally Manifold objects only require a single increment/decrement of the
stencil value. This result in less geometry generated and less overdraw.
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Also add new debug visualisation.
Depth fail method is not used for the moment but has nice benefits. It will
be used efficiently in the future.
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