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When running with ODSC in the editor Materials can have incomplete or partial shader maps. In other words some shaders _might_ be missing. If a render system requires all shaders to be present and can't use ODSC functionality to compile the necessary shaders we need a mechanism for compiling just the missing shaders. - Added UMaterialInterface::CacheShaders() which is implemented for UMatetrial and UMaterialInstance. The call is just forwarded along to CacheResourceShadersForRendering and InitStaticPermutation respectively. - You can call CacheResourceShadersForRendering multiple times (even with a completed shader map) and it will not recache uniform expressions. If the Resource's shader map is complete the function is a no-op. - FObjectCacheContext can accept a UWorld and will only return primitives that are in that world. - Added a function SubmitRemainingJobsForWorld(UWorld* World, EMaterialShaderPrecompileMode CompileMode) that will iterate all materials used by primitives in the world and compile the missing shaders. - SubmitRemainingJobsForWorld() is used in various scenarios in the editor to ensure _all_ shaders are compiled for all materials before proceeding. - Explicitly try to compile UI and PP materials. Since we don't know which ones are used in the given world we just have to iterate all loaded ones. This is a potential area of optimization. - If there are already complete shader maps (if you are not running with the shader job cache), SubmitRemainingJobsForWorld is fast and results in a no-op for each material. #rb Arciel.Rekman, Danny.Couture #jira UE-136442, UE-136447 #preflight 61fc0e9c176256ec4f764206 [CL 18848560 by Jason Nadro in ue5-main branch]