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https://github.com/RGBCube/serenity
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cd115270fc
In the same fashion like in the Linux kernel, we support pre-initialized framebuffers that were set up by either the BIOS or the bootloader. These framebuffers can be backed by any kind of video hardware, and are not tied to VGA hardware at all. Therefore, this code should be in a separate sub-folder in the Graphics subsystem to indicate this.
52 lines
2.2 KiB
C++
52 lines
2.2 KiB
C++
/*
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* Copyright (c) 2022, 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/RefPtr.h>
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#include <AK/Try.h>
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#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
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#include <Kernel/Graphics/DisplayConnector.h>
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#include <Kernel/Locking/Spinlock.h>
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#include <Kernel/Memory/TypedMapping.h>
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namespace Kernel {
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class GenericDisplayConnector
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: public DisplayConnector {
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friend class DeviceManagement;
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public:
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static NonnullRefPtr<GenericDisplayConnector> must_create_with_preset_resolution(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch);
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protected:
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ErrorOr<void> create_attached_framebuffer_console();
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GenericDisplayConnector(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch);
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virtual bool mutable_mode_setting_capable() const override final { return false; }
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virtual bool double_framebuffering_capable() const override { return false; }
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virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override { return Error::from_errno(ENOTSUP); }
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virtual ErrorOr<void> set_safe_mode_setting() override { return {}; }
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virtual ErrorOr<void> set_y_offset(size_t) override { return Error::from_errno(ENOTSUP); }
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virtual ErrorOr<void> unblank() override { return Error::from_errno(ENOTSUP); }
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virtual bool partial_flush_support() const override final { return false; }
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virtual bool flush_support() const override final { return false; }
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// Note: This is "possibly" a paravirtualized hardware, but since we don't know, we assume there's no refresh rate...
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// We rely on the BIOS and/or the bootloader to initialize the hardware for us, so we don't really care about
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// the specific implementation and settings that were chosen with the given hardware as long as we just
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// have a dummy framebuffer to work with.
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virtual bool refresh_rate_support() const override final { return false; }
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virtual ErrorOr<void> flush_first_surface() override final;
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virtual void enable_console() override final;
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virtual void disable_console() override final;
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RefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
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};
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}
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