keii.dev
1/*
2 * Copyright (C) 2020-2022 The opuntiaOS Project Authors.
3 * + Contributed by Nikita Melekhin <nimelehin@gmail.com>
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#include "Screen.h"
10#include "../Managers/Compositor.h"
11#include <cstring>
12#include <fcntl.h>
13#include <sys/ioctl.h>
14#include <sys/mman.h>
15#include <utility>
16
17namespace WinServer {
18
19Screen* s_WinServer_Screen_the = nullptr;
20
21Screen::Screen()
22 : m_depth(4)
23 , m_write_bitmap()
24 , m_display_bitmap()
25{
26 s_WinServer_Screen_the = this;
27 m_screen_fd = open("/dev/bga", O_RDWR);
28 m_bounds = LG::Rect(0, 0, ioctl(m_screen_fd, BGA_GET_WIDTH, 0), ioctl(m_screen_fd, BGA_GET_HEIGHT, 0));
29
30 size_t screen_buffer_size = width() * height() * depth();
31 auto* first_buffer = reinterpret_cast<LG::Color*>(mmap(NULL, 1, PROT_READ | PROT_WRITE, MAP_SHARED, m_screen_fd, 0));
32 auto* second_buffer = reinterpret_cast<LG::Color*>(reinterpret_cast<uint8_t*>(first_buffer) + screen_buffer_size);
33
34 m_display_bitmap = LG::PixelBitmap(first_buffer, width(), height());
35 m_write_bitmap = LG::PixelBitmap(second_buffer, width(), height());
36
37 m_display_bitmap_ptr = &m_display_bitmap;
38 m_write_bitmap_ptr = &m_write_bitmap;
39
40 m_active_buffer = 0;
41}
42
43void Screen::swap_buffers()
44{
45 m_write_bitmap_ptr.swap(m_display_bitmap_ptr);
46 m_active_buffer ^= 1;
47 ioctl(m_screen_fd, BGA_SWAP_BUFFERS, m_active_buffer);
48}
49
50} // namespace WinServer