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Kernel/Graphics: Simplify the feature level of the Graphics subsystem

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Instead of letting the user to determine whether framebuffer devices
will be created (which is useless because they are gone by now), let's
simplify the flow by allowing the user to choose between full, limited
or disabled functionality. The determination happens only once, so, if
the user decided to disable graphics support, the initialize method
exits immediately. If limited functionality is chosen, then a generic
DisplayConnector is initialized with the preset framebuffer resolution,
if present, and then the initialize method exits. As a default, the code
proceeds to initialize all drivers as usual.
This commit is contained in:
Liav A 2022-04-30 15:53:02 +03:00 • committed by Andreas Kling
parent e301af8352
commit d49a35df31
5 changed files with 35 additions and 50 deletions
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7
Kernel/Graphics/GraphicsManagement.h
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@ -33,10 +33,6 @@ public:
void attach_new_display_connector(Badge<DisplayConnector>, DisplayConnector&);
void detach_display_connector(Badge<DisplayConnector>, DisplayConnector&);
bool framebuffer_devices_console_only() const;
bool framebuffer_devices_use_bootloader_framebuffer() const;
bool framebuffer_devices_exist() const;
void set_vga_text_mode_cursor(size_t console_width, size_t x, size_t y);
void disable_vga_text_mode_console_cursor();
void disable_vga_emulation_access_permanently();
@ -55,6 +51,9 @@ private:
NonnullRefPtrVector<GenericGraphicsAdapter> m_graphics_devices;
RefPtr<Graphics::Console> m_console;
// Note: This is only used when booting with kernel commandline that includes "graphics_subsystem_mode=limited"
RefPtr<GenericDisplayConnector> m_preset_resolution_generic_display_connector;
// Note: there could be multiple VGA adapters, but only one can operate in VGA mode
RefPtr<VGACompatibleAdapter> m_vga_adapter;
unsigned m_current_minor_number { 0 };