Custom shader draw command. The renderer generates a quad over bounds
and dispatches the consumer's fragment shader with the kit's vertex prelude.
uniforms keys must match names declared in the consumer's fragment shader.
The kit automatically sets u_bounds, u_view, and u_proj — do not
declare those in uniforms.
Custom shader draw command. The renderer generates a quad over
boundsand dispatches the consumer's fragment shader with the kit's vertex prelude.uniformskeys must match names declared in the consumer's fragment shader. The kit automatically setsu_bounds,u_view, andu_proj— do not declare those inuniforms.API may change before v2.