#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]
#jira UE-21176 - Cannot click the create new project button on a monitor with 1366 x 768 resolution
[CL 2697249 by Richard TalbotWatkin in Main branch]
#jira UE-21176 - Cannot click the create new project button on a monitor with 1366 x 768 resolution
[CL 2697230 by Richard TalbotWatkin in Main branch]
Made the Project Browser window a bit higher so it's clear that there's description text below the template image.
#jira UE-9085 - new project browser window clipping
[CL 2511581 by Richard TalbotWatkin in Main branch]
Stopped the "Compiling C++ Code" message in the editor MainFrame always having a cancel button
FModuleCompilerStartedEvent now passes a bool to say whether the hot-reload/compile operation is being run async, or whether it's blocking. We now only show the cancel button for async compiles, as the UI is otherwise blocked waiting for the compile to finish.
Added a bWaitForCompletion input parameter to DoHotReloadFromEditor. This mirrors the RebindPackages API that DoHotReloadFromEditor internally calls, and prevents UPackFactory needing to perform a manual tick.
[CL 2437789 by Matthew Griffin in Main branch]
Also removed tabs from the project browser dialogs when they're not necessary. Fixed up some incorrect icon sizes to work with the new layout.
[CL 2290664 by Andrew Rodham in Main branch]
* Categorized templates into Blueprint/C++ templates and organized them into tabs
* New categories can be specified in the templatedefs.ini file of a template project using a Category tag:
Category=NewCategory
* New category types can be registered with a proper description and icon in code through FGameProjectGenerationModule::RegisterTemplateCategory.
* Added preview images to templates
* Generally tidied the UI
This addresses TTP#321302 - EDITOR: Project Browser: Reduce Thumbnail size of Templates
Reviewed by Matt.Kuhlenschmidt
[CL 2260660 by Andrew Rodham in Main branch]
Please note that file comments had no purpose in nearly all cases and just added visual clutter. The two files that had meaningful file comments had their comments moved into the corresponding classes. There are still hundreds of file comments left in other files that will be removed over time.
Also cleaned up some random stuff along the way:
- relative paths to public headers within the same module are no longer necessary (automatically discovered by UBT now)
- header guards are deprecated, use #pragma once instead (all compilers support it now)
- space between multiple template brackets is no longer required (all compilers support >> now)
- NULL to nullptr, OVERRIDE to override
- spelling errors, whitespace, line breaks
[CL 2104067 by Max Preussner in Main branch]
#ttp 330039 EDITOR: Platform-agnostic editor code depends on Windows-only VSAccessor headers
#detail Source code access is now extensible via plugins, so any new editors can be easily added.
#add Added SourceCodeAccess module that routes access via plugins.
#change Moved much of the old VSAccessor code into a new VisualStudioSourceCodeAccess plugin.
#add Added a counterpart XCode plugin & migrated the code from FSourceCodeNavigation (Applescript etc.) into there.
#remove Removed applescript for XCode access (it is now done via code).
#remove Removed source code access functionality from platform layer.
#add Added details customization for source code access settings, so users can choose their own accessor.
#remove Removed dependencies on VSAccessor.
#change Changed API in SWidget to not require building a string to be parsed, instead this acesses and forwards filenames & line numbers.
#extra Tested on Mac by Mark S.
reviewed by Andrew.Brown
[CL 2048697 by Thomas Sarkanen in Main branch]
#proj UE4
#branch UE4
#summary Changed UBT and UHT exit codes to inform about compilation result. The editor is reading exit code of UBT process and changes output message informing if this is a failure due to header changes.
#codereview Robert.Manuszewski
[CL 2044928 by Jaroslaw Palczynski in Main branch]
