#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]
[UETOOL-125] - Have the "return to defaults" arrow on a brush's texture actually go back to the size of the texture
#change Customization of property rows now supports passing reset to default customizations to child properties so that structs like vectors can have their components handled by the same custom handler as the parent. Properties identify themselves by passing their handle to the delegate.
#change Reset to default is now set on properties using FResetToDefaultOverride class containing the delegates and ovrride behaviors.
#change Slate brush customization sets custom reset behavior on the Image Size property and uses the texture size as the default size.
#codereview matt.kuhlenschmidt
[CL 2644978 by Chris Wood in Main branch]
The display name, filter string, and tooltips for the property editor (and associated detail customizations) are now stored as FText rather than FString. This allows us to remove SLATE_TEXT_ARGUMENT from the detail customization widgets.
[CL 2372595 by Jamie Dale in Main branch]
- Improved UI. Removed bOverrideBaseProperties as it was pointless. Altered customization to place check boxes for overrides next to their values like the parameters of instances.
- Overrides now respect the parent chain.
- Mirrored the override data in the MIC render proxy.
#codereview Nick.Penwarden, Daniel.Wright
[CL 2364823 by Simon Tovey in Main branch]
#ttp 339373 - Crash: when you create a endless loop with material instance that has it self as a parent the editor will become unresponsive
#branch UE4
#proj Editor.MaterialEditor, Editor.UnrealEd, Runtime.Engine
[CL 2320455 by Richard TalbotWatkin in Main branch]
#TTP 340962 - LIVE: RENDERING: Font Sample Parameter Behavior in MIC
Created sub struct for UDEditorFontParameterValue to contain the font parameter fields.
Removed font specific widget construction as it can now use the generic CreateParameterValueWidget function to build the UI.
[CL 2238120 by Allan Bentham in Main branch]
