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https://github.com/SerenityOS/serenity
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c48d540230
This code is specific to x86 machines, as virtually no other computer architecture has any compatibility with old VGA legacy functionality.
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, 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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#pragma once
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#include <AK/Types.h>
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#include <Kernel/Devices/GPU/Console/Console.h>
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#include <Kernel/Locking/Spinlock.h>
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namespace Kernel::Graphics {
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class VGATextModeConsole final : public Console {
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public:
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static NonnullLockRefPtr<VGATextModeConsole> initialize();
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virtual size_t chars_per_line() const override { return width(); }
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virtual bool has_hardware_cursor() const override { return true; }
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virtual bool is_hardware_paged_capable() const override { return true; }
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virtual size_t bytes_per_base_glyph() const override { return 2; }
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virtual void set_cursor(size_t x, size_t y) override;
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virtual void clear(size_t x, size_t y, size_t length) override;
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virtual void write(size_t x, size_t y, char ch, bool critical = false) override;
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virtual void write(size_t x, size_t y, char ch, Color background, Color foreground, bool critical = false) override;
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virtual void write(char ch, bool critical = false) override;
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virtual void flush(size_t, size_t, size_t, size_t) override { }
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virtual void enable() override { }
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virtual void disable() override { }
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private:
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virtual void hide_cursor() override;
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virtual void show_cursor() override;
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virtual void scroll_up() override;
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void clear_vga_row(u16 row);
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explicit VGATextModeConsole(NonnullOwnPtr<Memory::Region>);
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mutable Spinlock<LockRank::None> m_vga_lock {};
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NonnullOwnPtr<Memory::Region> m_vga_window_region;
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VirtualAddress m_current_vga_window;
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};
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}
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