#lockdown Nick.Penwarden
#rb none
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MAJOR FEATURES + CHANGES
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Change 3209340 on 2016/11/23 by Ben.Marsh
Convert UE4 codebase to an "include what you use" model - where every header just includes the dependencies it needs, rather than every source file including large monolithic headers like Engine.h and UnrealEd.h.
Measured full rebuild times around 2x faster using XGE on Windows, and improvements of 25% or more for incremental builds and full rebuilds on most other platforms.
* Every header now includes everything it needs to compile.
* There's a CoreMinimal.h header that gets you a set of ubiquitous types from Core (eg. FString, FName, TArray, FVector, etc...). Most headers now include this first.
* There's a CoreTypes.h header that sets up primitive UE4 types and build macros (int32, PLATFORM_WIN64, etc...). All headers in Core include this first, as does CoreMinimal.h.
* Every .cpp file includes its matching .h file first.
* This helps validate that each header is including everything it needs to compile.
* No engine code includes a monolithic header such as Engine.h or UnrealEd.h any more.
* You will get a warning if you try to include one of these from the engine. They still exist for compatibility with game projects and do not produce warnings when included there.
* There have only been minor changes to our internal games down to accommodate these changes. The intent is for this to be as seamless as possible.
* No engine code explicitly includes a precompiled header any more.
* We still use PCHs, but they're force-included on the compiler command line by UnrealBuildTool instead. This lets us tune what they contain without breaking any existing include dependencies.
* PCHs are generated by a tool to get a statistical amount of coverage for the source files using it, and I've seeded the new shared PCHs to contain any header included by > 15% of source files.
Tool used to generate this transform is at Engine\Source\Programs\IncludeTool.
[CL 3209342 by Ben Marsh in Main branch]
UE-14641 - Fix PushMenu() to use QueryPopupMethod()
Pretty big refactor
Adds IMenu as way to identify menus. Replaces referring to menus as SWindows.
Lots of uses of PushMenu() fixed up to match new API
#codereview Nick.Atamas
[CL 2579277 by Chris Wood in Main branch]
- Fixed references not being up-to-date as changes are made live in the editor. Simply close and reopen the Size Map to see updated references. (UE-14410)
- Fixed many issues with Size Map not showing the correct set of referenced content by an asset (no longer uses Asset Registry, instead serializes to find references.)
- Fixed 2D textures not reporting correct size (they were reporting current streamed-in mips, not worst-case size)
- Fixed assets that reported zero bytes as their size not being tracked as "unknown size"
- Fixed root-level assets sometimes getting bundled into the "SHARED" group
- Fixed Size Map no longer functioning when viewing large numbers of assets, such as all Engine Content
- Fixed Size Map having to be closed and reopened sometimes to show all of the correct references
- Fixed node text sometimes drawing with unintentionally huge fonts due to integer overflow
- Fixed the asset type name not being shown next to an asset name that had child references
- Fixed hard-to-read text labels due to node colors being desaturated too much at even shallow depth levels
[CL 2530259 by Mike Fricker in Main branch]
- New "Size Map" feature that shows the resource size for selected assets in Content Browser
- Select assets in Content Browser, right click and choose "Size Map..." to show sizes for those assets
- Select actors and press Alt+Shift+M to show sizes of assets used by those actors
- Select assets in Reference Viewer, right click and choose "Size Map..." to show sizes for those assets
- Also added a new "Tree Map" general purpose Slate widget (STreeMap)
[CL 2521609 by Mike Fricker in Main branch]
