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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Bus/VirtIO/Device.h>
#include <Kernel/Bus/VirtIO/Queue.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
namespace Kernel::Graphics::VirtIOGPU {
class GraphicsAdapter;
class FramebufferDevice final : public GenericFramebufferDevice {
friend class Console;
struct Buffer {
size_t framebuffer_offset { 0 };
u8* framebuffer_data { nullptr };
Protocol::Rect dirty_rect {};
ResourceID resource_id { 0 };
};
public:
FramebufferDevice(GraphicsAdapter const&, ScanoutID);
virtual ~FramebufferDevice() override;
virtual ErrorOr<void> try_to_initialize() override { return {}; }
virtual void deactivate_writes();
virtual void activate_writes();
size_t width() const { return display_info().rect.width; }
size_t height() const { return display_info().rect.height; }
size_t pitch() const { return display_info().rect.width * 4; }
static size_t calculate_framebuffer_size(size_t width, size_t height)
{
// VirtIO resources can only map on page boundaries!
return Memory::page_round_up(sizeof(u32) * width * height);
}
u8* framebuffer_data();
private:
virtual bool multihead_support() const override { return false; }
virtual bool flushing_support() const override { return false; }
virtual bool partial_flushing_support() const override { return true; }
virtual size_t heads_count() const override { return 1; }
virtual ErrorOr<size_t> buffer_length(size_t head) const override;
virtual ErrorOr<size_t> pitch(size_t head) const override;
virtual ErrorOr<size_t> height(size_t head) const override;
virtual ErrorOr<size_t> width(size_t head) const override;
virtual ErrorOr<size_t> vertical_offset(size_t head) const override;
virtual ErrorOr<bool> vertical_offsetted(size_t head) const override;
virtual ErrorOr<void> set_head_resolution(size_t head, size_t width, size_t height, size_t pitch) override;
virtual ErrorOr<void> set_head_buffer(size_t head, bool second_buffer) override;
virtual ErrorOr<void> flush_head_buffer(size_t head) override;
virtual ErrorOr<void> flush_rectangle(size_t head, FBRect const&) override;
void flush_dirty_window(Protocol::Rect const&, Buffer&);
void transfer_framebuffer_data_to_host(Protocol::Rect const&, Buffer&);
void flush_displayed_image(Protocol::Rect const&, Buffer&);
void draw_ntsc_test_pattern(Buffer&);
Protocol::DisplayInfoResponse::Display const& display_info() const;
Protocol::DisplayInfoResponse::Display& display_info();
void clear_to_black(Buffer&);
ErrorOr<void> create_framebuffer();
void create_buffer(Buffer&, size_t, size_t);
void set_buffer(int);
virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
static bool is_valid_buffer_index(int buffer_index)
{
return buffer_index == 0 || buffer_index == 1;
}
Buffer& buffer_from_index(int buffer_index)
{
return buffer_index == 0 ? m_main_buffer : m_back_buffer;
}
Buffer& current_buffer() const { return *m_current_buffer; }
RefPtr<GraphicsAdapter> adapter() const;
const ScanoutID m_scanout;
Buffer* m_current_buffer { nullptr };
Atomic<int, AK::memory_order_relaxed> m_last_set_buffer_index { 0 };
Buffer m_main_buffer;
Buffer m_back_buffer;
OwnPtr<Memory::Region> m_framebuffer;
RefPtr<Memory::VMObject> m_framebuffer_sink_vmobject;
size_t m_buffer_size { 0 };
bool m_are_writes_active { true };
// FIXME: This needs to be cleaned up if the WindowServer exits while we are in a tty
WeakPtr<Memory::Region> m_userspace_mmap_region;
};
}
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