mirror of
https://github.com/RGBCube/serenity
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3337a5722a
According to the specification, modesetting can be invoked with no need for flushing the framebuffer nor with DMA to transfer the framebuffer rendering.
87 lines
3.3 KiB
C++
87 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/BinaryBufferWriter.h>
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#include <AK/DistinctNumeric.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/Graphics/Console/Console.h>
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#include <Kernel/Graphics/DisplayConnector.h>
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#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
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#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
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#include <Kernel/Memory/Region.h>
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#include <LibEDID/EDID.h>
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namespace Kernel::Graphics::VirtIOGPU {
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class Console;
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}
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namespace Kernel {
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class VirtIOGraphicsAdapter;
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class VirtIODisplayConnector final : public DisplayConnector {
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friend class Graphics::VirtIOGPU::Console;
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friend class DeviceManagement;
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public:
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static NonnullLockRefPtr<VirtIODisplayConnector> must_create(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id);
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void set_edid_bytes(Badge<VirtIOGraphicsAdapter>, Array<u8, 128> const& edid_bytes);
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void set_safe_mode_setting_after_initialization(Badge<VirtIOGraphicsAdapter>);
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Graphics::VirtIOGPU::ScanoutID scanout_id() const { return m_scanout_id; }
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Graphics::VirtIOGPU::Protocol::DisplayInfoResponse::Display display_information(Badge<VirtIOGraphicsAdapter>) const;
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void initialize_console(Badge<VirtIOGraphicsAdapter>);
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private:
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virtual bool mutable_mode_setting_capable() const override { return true; }
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virtual bool double_framebuffering_capable() const override { return false; }
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virtual bool partial_flush_support() const override { return true; }
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virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
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virtual ErrorOr<void> set_safe_mode_setting() override;
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virtual ErrorOr<void> set_y_offset(size_t y) override;
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virtual ErrorOr<void> unblank() override;
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// Note: VirtIO hardware requires a constant refresh to keep the screen in sync to the user.
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virtual bool flush_support() const override { return true; }
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// Note: Paravirtualized hardware doesn't require a defined refresh rate for modesetting.
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virtual bool refresh_rate_support() const override { return false; }
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virtual ErrorOr<void> flush_first_surface() override;
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virtual ErrorOr<void> flush_rectangle(size_t buffer_index, FBRect const& rect) override;
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virtual void enable_console() override;
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virtual void disable_console() override;
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static bool is_valid_buffer_index(size_t buffer_index)
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{
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return buffer_index == 0 || buffer_index == 1;
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}
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private:
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VirtIODisplayConnector(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id);
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ErrorOr<void> flush_displayed_image(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
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void set_dirty_displayed_rect(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
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void clear_to_black();
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// Member data
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// Context used for kernel operations (e.g. flushing resources to scanout)
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Graphics::VirtIOGPU::ContextID m_kernel_context_id;
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NonnullLockRefPtr<VirtIOGraphicsAdapter> m_graphics_adapter;
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LockRefPtr<Graphics::VirtIOGPU::Console> m_console;
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Graphics::VirtIOGPU::Protocol::DisplayInfoResponse::Display m_display_info {};
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Graphics::VirtIOGPU::ScanoutID m_scanout_id;
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constexpr static size_t NUM_TRANSFER_REGION_PAGES = 256;
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};
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}
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