Kernel/Graphics: Use DisplayConnector design for the Bochs driver

Kernel/Graphics/Bochs/QEMUDisplayConnector.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/RefPtr.h>
+#include <AK/Try.h>
+#include <Kernel/Graphics/Bochs/DisplayConnector.h>
+#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
+#include <Kernel/Locking/Spinlock.h>
+#include <Kernel/Memory/TypedMapping.h>
+
+namespace Kernel {
+
+struct BochsDisplayMMIORegisters;
+class QEMUDisplayConnector final
+    : public BochsDisplayConnector {
+    friend class BochsGraphicsAdapter;
+    friend class DeviceManagement;
+
+public:
+    static NonnullRefPtr<QEMUDisplayConnector> must_create(PhysicalAddress framebuffer_address, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
+
+    virtual IndexID index_id() const override;
+
+private:
+    ErrorOr<void> fetch_and_initialize_edid();
+    QEMUDisplayConnector(PhysicalAddress framebuffer_address, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
+
+    virtual bool double_framebuffering_capable() const override { return true; }
+    virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
+    virtual ErrorOr<void> set_y_offset(size_t y) override;
+    virtual ErrorOr<void> unblank() override;
+
+    void set_framebuffer_to_big_endian_format();
+    void set_framebuffer_to_little_endian_format();
+
+private:
+    Memory::TypedMapping<BochsDisplayMMIORegisters volatile> m_registers;
+};
+}