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WindowServer: Re-use existing Screen instances and improve fallbacks

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If a screen layout cannot be applied, instead of failing to start
WindowServer try to fall back to an auto-generated screen layout with
the devices that are detected.

Also, be a bit smarter about changing the current screen layout.
Instead of closing all framebuffers and bringing them back up, keep
what we can and only change resolution on those that we need to change
them on. To make this work we also need to move away from using an
array of structures to hold compositor related per-screen data to
attaching it to the Screen itself, which makes re-using a screen much
simpler.
This commit is contained in:
Tom 2021-07-18 10:24:41 -06:00 • committed by Andreas Kling
parent 1ecb725357
commit dbb9f891fb
7 changed files with 483 additions and 190 deletions
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2
Userland/Services/WindowServer/ScreenLayout.h
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@ -35,7 +35,7 @@ public:
unsigned main_screen_index { 0 };
bool is_valid(String* error_msg = nullptr) const;
void normalize();
bool normalize();
bool load_config(const Core::ConfigFile& config_file, String* error_msg = nullptr);
bool save_config(Core::ConfigFile& config_file, bool sync = true) const;
bool try_auto_add_framebuffer(String const&);