mirror of
https://github.com/LadybirdBrowser/ladybird.git
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109 lines
3.9 KiB
C++
109 lines
3.9 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 GenericFramebufferDevice {
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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 ErrorOr<void> try_to_initialize() override { return {}; }
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virtual void deactivate_writes() override;
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virtual void activate_writes() override;
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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).value();
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}
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u8* framebuffer_data();
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private:
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virtual bool multihead_support() const override { return false; }
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virtual bool flushing_support() const override { return false; }
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virtual bool partial_flushing_support() const override { return true; }
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virtual size_t heads_count() const override { return 1; }
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virtual ErrorOr<size_t> buffer_length(size_t head) const override;
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virtual ErrorOr<size_t> pitch(size_t head) const override;
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virtual ErrorOr<size_t> height(size_t head) const override;
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virtual ErrorOr<size_t> width(size_t head) const override;
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virtual ErrorOr<size_t> vertical_offset(size_t head) const override;
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virtual ErrorOr<bool> vertical_offsetted(size_t head) const override;
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virtual ErrorOr<void> set_head_resolution(size_t head, size_t width, size_t height, size_t pitch) override;
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virtual ErrorOr<void> set_head_buffer(size_t head, bool second_buffer) override;
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virtual ErrorOr<void> flush_head_buffer(size_t head) override;
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virtual ErrorOr<void> flush_rectangle(size_t head, FBRect const&) override;
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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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Protocol::DisplayInfoResponse::Display const& display_info() const;
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Protocol::DisplayInfoResponse::Display& display_info();
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void clear_to_black(Buffer&);
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ErrorOr<void> 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 ErrorOr<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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RefPtr<GraphicsAdapter> adapter() const;
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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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