mirror of
https://github.com/RGBCube/serenity
synced 2025-07-24 15:27:42 +00:00
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Kernel/Devices/BlockDevice.h>
|
|
#include <Kernel/Graphics/VirtIOGPU/VirtIOGPU.h>
|
|
#include <Kernel/VirtIO/VirtIO.h>
|
|
#include <Kernel/VirtIO/VirtIOQueue.h>
|
|
|
|
namespace Kernel::Graphics {
|
|
|
|
class VirtIOFrameBufferDevice final : public BlockDevice {
|
|
public:
|
|
VirtIOFrameBufferDevice(VirtIOGPU& virtio_gpu, VirtIOGPUScanoutID);
|
|
virtual ~VirtIOFrameBufferDevice() override;
|
|
|
|
virtual void deactivate_writes();
|
|
virtual void activate_writes();
|
|
|
|
bool try_to_set_resolution(size_t width, size_t height);
|
|
void clear_to_black();
|
|
|
|
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; }
|
|
|
|
size_t size_in_bytes() const;
|
|
static size_t calculate_framebuffer_size(size_t width, size_t height)
|
|
{
|
|
return sizeof(u32) * width * height;
|
|
}
|
|
|
|
void flush_dirty_window(VirtIOGPURect const&);
|
|
void transfer_framebuffer_data_to_host(VirtIOGPURect const&);
|
|
void flush_displayed_image(VirtIOGPURect const&);
|
|
|
|
void draw_ntsc_test_pattern();
|
|
|
|
u8* framebuffer_data();
|
|
|
|
private:
|
|
virtual const char* class_name() const override { return "VirtIOFrameBuffer"; }
|
|
|
|
VirtIOGPURespDisplayInfo::VirtIOGPUDisplayOne const& display_info() const;
|
|
VirtIOGPURespDisplayInfo::VirtIOGPUDisplayOne& display_info();
|
|
|
|
void create_framebuffer();
|
|
|
|
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
|
|
virtual KResultOr<Region*> mmap(Process&, FileDescription&, const Range&, u64 offset, int prot, bool shared) override;
|
|
virtual bool can_read(const FileDescription&, size_t) const override { return true; }
|
|
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
|
|
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
|
|
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; };
|
|
virtual void start_request(AsyncBlockDeviceRequest& request) override { request.complete(AsyncDeviceRequest::Failure); }
|
|
|
|
virtual mode_t required_mode() const override { return 0666; }
|
|
virtual String device_name() const override { return String::formatted("fb{}", minor()); }
|
|
|
|
VirtIOGPU& m_gpu;
|
|
const VirtIOGPUScanoutID m_scanout;
|
|
VirtIOGPUResourceID m_resource_id { 0 };
|
|
OwnPtr<Region> m_framebuffer;
|
|
RefPtr<VMObject> m_framebuffer_sink_vmobject;
|
|
bool m_are_writes_active { true };
|
|
// FIXME: This needs to be cleaned up if the WindowServer exits while we are in a tty
|
|
WeakPtr<Region> m_userspace_mmap_region;
|
|
};
|
|
|
|
}
|