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https://github.com/RGBCube/serenity
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e2ed6ef741
The mmap interface was removed when we introduced the DisplayConnector class, as it was quite unsafe to use and didn't handle switching between graphical and text modes safely. By using the SharedFramebufferVMObject, we are able to elegantly coordinate the switch by remapping the attached mmap'ed-Memory::Region(s) with different mappings, therefore, keeping WindowServer to think that the mappings it has are still valid, while they are going to a different physical range until we are back to the graphical mode (after a switch from text mode). Most drivers take advantage of the fact that we know where is the actual framebuffer in physical memory space, the SharedFramebufferVMObject is created with that information. However, the VirtIO driver is different in that aspect, because it relies on DMA transactions to show graphics on the framebuffer, so the SharedFramebufferVMObject is created with that mindset to support the arbitrary framebuffer location in physical memory space.
64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Arch/x86/IO.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
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#include <Kernel/Graphics/GraphicsManagement.h>
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#include <Kernel/Graphics/VGA/DisplayConnector.h>
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namespace Kernel {
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NonnullRefPtr<GenericDisplayConnector> GenericDisplayConnector::must_create_with_preset_resolution(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
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{
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auto device_or_error = DeviceManagement::try_create_device<GenericDisplayConnector>(framebuffer_address, width, height, pitch);
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VERIFY(!device_or_error.is_error());
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auto connector = device_or_error.release_value();
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MUST(connector->create_attached_framebuffer_console());
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MUST(connector->initialize_edid_for_generic_monitor());
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return connector;
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}
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GenericDisplayConnector::GenericDisplayConnector(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
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: DisplayConnector(framebuffer_address, height * pitch, true)
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{
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m_current_mode_setting.horizontal_active = width;
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m_current_mode_setting.vertical_active = height;
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m_current_mode_setting.horizontal_stride = pitch;
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}
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ErrorOr<void> GenericDisplayConnector::create_attached_framebuffer_console()
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{
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auto width = m_current_mode_setting.horizontal_active;
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auto height = m_current_mode_setting.vertical_active;
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auto pitch = m_current_mode_setting.horizontal_stride;
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m_framebuffer_console = Graphics::ContiguousFramebufferConsole::initialize(m_framebuffer_address.value(), width, height, pitch);
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GraphicsManagement::the().set_console(*m_framebuffer_console);
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return {};
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}
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void GenericDisplayConnector::enable_console()
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{
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VERIFY(m_control_lock.is_locked());
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VERIFY(m_framebuffer_console);
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m_framebuffer_console->enable();
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}
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void GenericDisplayConnector::disable_console()
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{
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VERIFY(m_control_lock.is_locked());
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VERIFY(m_framebuffer_console);
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m_framebuffer_console->disable();
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}
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ErrorOr<void> GenericDisplayConnector::flush_first_surface()
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{
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return Error::from_errno(ENOTSUP);
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}
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}
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