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https://github.com/RGBCube/serenity
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78e724a899
We already use the term adapter for instances of this class, so let's better represent this class by changing its name to what it really is.
95 lines
3.1 KiB
C++
95 lines
3.1 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 <Kernel/Bus/VirtIO/Device.h>
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#include <Kernel/Bus/VirtIO/Queue.h>
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#include <Kernel/Graphics/FramebufferDevice.h>
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#include <Kernel/Graphics/GenericGraphicsAdapter.h>
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#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
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namespace Kernel::Graphics::VirtIOGPU {
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class GraphicsAdapter;
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class FramebufferDevice final : public Kernel::FramebufferDevice {
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friend class Console;
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struct Buffer {
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size_t framebuffer_offset { 0 };
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u8* framebuffer_data { nullptr };
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Protocol::Rect dirty_rect {};
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ResourceID resource_id { 0 };
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};
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public:
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FramebufferDevice(GraphicsAdapter const&, ScanoutID);
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virtual ~FramebufferDevice() override;
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virtual void deactivate_writes();
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virtual void activate_writes();
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KResult try_to_set_resolution(size_t width, size_t height);
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void clear_to_black(Buffer&);
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size_t width() const { return display_info().rect.width; }
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size_t height() const { return display_info().rect.height; }
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size_t pitch() const { return display_info().rect.width * 4; }
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static size_t calculate_framebuffer_size(size_t width, size_t height)
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{
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// VirtIO resources can only map on page boundaries!
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return Memory::page_round_up(sizeof(u32) * width * height);
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}
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void flush_dirty_window(Protocol::Rect const&, Buffer&);
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void transfer_framebuffer_data_to_host(Protocol::Rect const&, Buffer&);
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void flush_displayed_image(Protocol::Rect const&, Buffer&);
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void draw_ntsc_test_pattern(Buffer&);
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u8* framebuffer_data();
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private:
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virtual StringView class_name() const override { return "VirtIOFrameBuffer"sv; }
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Protocol::DisplayInfoResponse::Display const& display_info() const;
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Protocol::DisplayInfoResponse::Display& display_info();
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KResult create_framebuffer();
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void create_buffer(Buffer&, size_t, size_t);
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void set_buffer(int);
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virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
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virtual KResultOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
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static bool is_valid_buffer_index(int 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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Buffer& buffer_from_index(int buffer_index)
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{
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return buffer_index == 0 ? m_main_buffer : m_back_buffer;
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}
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Buffer& current_buffer() const { return *m_current_buffer; }
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GraphicsAdapter const& adapter() const;
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GraphicsAdapter& adapter();
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const ScanoutID m_scanout;
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Buffer* m_current_buffer { nullptr };
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Atomic<int, AK::memory_order_relaxed> m_last_set_buffer_index { 0 };
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Buffer m_main_buffer;
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Buffer m_back_buffer;
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OwnPtr<Memory::Region> m_framebuffer;
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RefPtr<Memory::VMObject> m_framebuffer_sink_vmobject;
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size_t m_buffer_size { 0 };
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bool m_are_writes_active { true };
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// FIXME: This needs to be cleaned up if the WindowServer exits while we are in a tty
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WeakPtr<Memory::Region> m_userspace_mmap_region;
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};
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}
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