mirror of
https://github.com/RGBCube/serenity
synced 2025-07-26 03:17:34 +00:00
WindowServer: Create the VirtualScreenBackend
This screen backend is just memory-backed and doesn't connect to any screen hardware. That way, we can boot Serenity without video hardware but in full graphical mode :^) To create a virtual screen, put something like this in your WindowServer.ini. There's no way yet to do this through Display Settings, though an existing virtual screen's settings can be changed there. ```ini [Screen0] Mode=Virtual Left=1024 Top=0 Width=1920 Height=1080 ScaleFactor=1 ```
This commit is contained in:
parent
be98ce0f9f
commit
935f401714
4 changed files with 140 additions and 4 deletions
81
Userland/Services/WindowServer/VirtualScreenBackend.cpp
Normal file
81
Userland/Services/WindowServer/VirtualScreenBackend.cpp
Normal file
|
@ -0,0 +1,81 @@
|
|||
/*
|
||||
* Copyright (c) 2018-2020, the SerenityOS developers.
|
||||
* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include "VirtualScreenBackend.h"
|
||||
#include "ScreenBackend.h"
|
||||
#include <AK/Try.h>
|
||||
#include <AK/kmalloc.h>
|
||||
#include <LibGfx/Color.h>
|
||||
|
||||
namespace WindowServer {
|
||||
|
||||
VirtualScreenBackend::~VirtualScreenBackend()
|
||||
{
|
||||
MUST(unmap_framebuffer());
|
||||
}
|
||||
|
||||
ErrorOr<void> VirtualScreenBackend::open()
|
||||
{
|
||||
m_can_device_flush_buffers = true;
|
||||
m_can_set_head_buffer = true;
|
||||
return {};
|
||||
}
|
||||
|
||||
void VirtualScreenBackend::set_head_buffer(int index)
|
||||
{
|
||||
VERIFY(index <= 1 && index >= 0);
|
||||
m_first_buffer_active = index == 0;
|
||||
}
|
||||
|
||||
ErrorOr<void> VirtualScreenBackend::set_head_resolution(FBHeadResolution resolution)
|
||||
{
|
||||
if (resolution.head_index != 0)
|
||||
return Error::from_string_literal("Only head index 0 is supported."sv);
|
||||
m_height = resolution.height;
|
||||
|
||||
if (resolution.pitch == 0)
|
||||
resolution.pitch = static_cast<int>(resolution.width * sizeof(Gfx::ARGB32));
|
||||
m_pitch = resolution.pitch;
|
||||
if (static_cast<int>(resolution.width * sizeof(Gfx::ARGB32)) != resolution.pitch)
|
||||
return Error::from_string_literal("Unsupported pitch"sv);
|
||||
|
||||
m_width = resolution.width;
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<FBHeadProperties> VirtualScreenBackend::get_head_properties()
|
||||
{
|
||||
return FBHeadProperties {
|
||||
.head_index = 0,
|
||||
.pitch = static_cast<unsigned>(m_pitch),
|
||||
.width = static_cast<unsigned>(m_width),
|
||||
.height = static_cast<unsigned>(m_height),
|
||||
.offset = static_cast<unsigned>(m_first_buffer_active ? 0 : m_back_buffer_offset),
|
||||
.buffer_length = static_cast<unsigned>(m_size_in_bytes),
|
||||
};
|
||||
}
|
||||
|
||||
ErrorOr<void> VirtualScreenBackend::map_framebuffer()
|
||||
{
|
||||
m_size_in_bytes = static_cast<unsigned long>(m_pitch) * m_height * 2;
|
||||
m_framebuffer = new Gfx::ARGB32[static_cast<unsigned long>(m_width) * m_height * 2];
|
||||
if (m_framebuffer == nullptr)
|
||||
return Error::from_errno(ENOMEM);
|
||||
|
||||
m_back_buffer_offset = m_size_in_bytes / 2;
|
||||
m_first_buffer_active = true;
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> VirtualScreenBackend::unmap_framebuffer()
|
||||
{
|
||||
delete[] m_framebuffer;
|
||||
return {};
|
||||
}
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue