ladybird/Kernel/Graphics/Console/VGATextModeConsole.h

/*
 * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/RefCounted.h>
#include <AK/Types.h>
#include <Kernel/Graphics/Console/Console.h>
#include <Kernel/Locking/Spinlock.h>

namespace Kernel::Graphics {
class VGATextModeConsole final : public Console {
public:
    static NonnullRefPtr<VGATextModeConsole> initialize();
    virtual size_t chars_per_line() const override { return width(); };

    virtual bool has_hardware_cursor() const override { return true; }
    virtual bool is_hardware_paged_capable() const override { return true; }

    virtual size_t bytes_per_base_glyph() const override { return 2; }
    virtual void set_cursor(size_t x, size_t y) override;
    virtual void hide_cursor() override;
    virtual void show_cursor() override;
    virtual void clear(size_t x, size_t y, size_t length) override;
    virtual void write(size_t x, size_t y, char ch, bool critical = false) override;
    virtual void write(size_t x, size_t y, char ch, Color background, Color foreground, bool critical = false) override;
    virtual void write(char ch, bool critical = false) override;
    virtual void flush(size_t, size_t, size_t, size_t) override { }

    virtual void enable() override { }
    virtual void disable() override { }

private:
    void clear_vga_row(u16 row);

    explicit VGATextModeConsole(NonnullOwnPtr<Memory::Region>);

    mutable Spinlock m_vga_lock;

    NonnullOwnPtr<Memory::Region> m_vga_window_region;
    VirtualAddress m_current_vga_window;
};

}