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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "Screen.h"
28#include "Compositor.h"
29#include "Event.h"
30#include "EventLoop.h"
31#include "WindowManager.h"
32#include <Kernel/FB.h>
33#include <Kernel/MousePacket.h>
34#include <fcntl.h>
35#include <stdio.h>
36#include <sys/mman.h>
37#include <unistd.h>
38
39namespace WindowServer {
40
41static Screen* s_the;
42
43Screen& Screen::the()
44{
45 ASSERT(s_the);
46 return *s_the;
47}
48
49Screen::Screen(unsigned desired_width, unsigned desired_height)
50{
51 ASSERT(!s_the);
52 s_the = this;
53 m_framebuffer_fd = open("/dev/fb0", O_RDWR | O_CLOEXEC);
54 if (m_framebuffer_fd < 0) {
55 perror("failed to open /dev/fb0");
56 ASSERT_NOT_REACHED();
57 }
58
59 if (fb_set_buffer(m_framebuffer_fd, 0) == 0) {
60 m_can_set_buffer = true;
61 }
62
63 set_resolution(desired_width, desired_height);
64 m_cursor_location = rect().center();
65}
66
67Screen::~Screen()
68{
69}
70
71void Screen::set_resolution(int width, int height)
72{
73 FBResolution resolution { 0, (int)width, (int)height };
74 int rc = fb_set_resolution(m_framebuffer_fd, &resolution);
75 ASSERT(rc == 0);
76 on_change_resolution(resolution.pitch, resolution.width, resolution.height);
77}
78
79void Screen::on_change_resolution(int pitch, int width, int height)
80{
81 if (m_framebuffer) {
82 size_t previous_size_in_bytes = m_size_in_bytes;
83 int rc = munmap(m_framebuffer, previous_size_in_bytes);
84 ASSERT(rc == 0);
85 }
86
87 int rc = fb_get_size_in_bytes(m_framebuffer_fd, &m_size_in_bytes);
88 ASSERT(rc == 0);
89
90 m_framebuffer = (Gfx::RGBA32*)mmap(nullptr, m_size_in_bytes, PROT_READ | PROT_WRITE, MAP_SHARED, m_framebuffer_fd, 0);
91 ASSERT(m_framebuffer && m_framebuffer != (void*)-1);
92
93 m_pitch = pitch;
94 m_width = width;
95 m_height = height;
96
97 m_cursor_location.constrain(rect());
98}
99
100void Screen::set_buffer(int index)
101{
102 ASSERT(m_can_set_buffer);
103 int rc = fb_set_buffer(m_framebuffer_fd, index);
104 ASSERT(rc == 0);
105}
106
107void Screen::on_receive_mouse_data(const MousePacket& packet)
108{
109 auto prev_location = m_cursor_location;
110 if (packet.is_relative) {
111 m_cursor_location.move_by(packet.x, packet.y);
112#ifdef WSSCREEN_DEBUG
113 dbgprintf("Screen: New Relative mouse point @ X %d, Y %d\n", m_cursor_location.x(), m_cursor_location.y());
114#endif
115 } else {
116 m_cursor_location = { packet.x * m_width / 0xffff, packet.y * m_height / 0xffff };
117#ifdef WSSCREEN_DEBUG
118 dbgprintf("Screen: New Absolute mouse point @ X %d, Y %d\n", m_cursor_location.x(), m_cursor_location.y());
119#endif
120 }
121
122 m_cursor_location.constrain(rect());
123
124 unsigned buttons = packet.buttons;
125 unsigned prev_buttons = m_mouse_button_state;
126 m_mouse_button_state = buttons;
127 unsigned changed_buttons = prev_buttons ^ buttons;
128 auto post_mousedown_or_mouseup_if_needed = [&](MouseButton button) {
129 if (!(changed_buttons & (unsigned)button))
130 return;
131 auto message = make<MouseEvent>(buttons & (unsigned)button ? Event::MouseDown : Event::MouseUp, m_cursor_location, buttons, button, m_modifiers);
132 Core::EventLoop::current().post_event(WindowManager::the(), move(message));
133 };
134 post_mousedown_or_mouseup_if_needed(MouseButton::Left);
135 post_mousedown_or_mouseup_if_needed(MouseButton::Right);
136 post_mousedown_or_mouseup_if_needed(MouseButton::Middle);
137 if (m_cursor_location != prev_location) {
138 auto message = make<MouseEvent>(Event::MouseMove, m_cursor_location, buttons, MouseButton::None, m_modifiers);
139 Core::EventLoop::current().post_event(WindowManager::the(), move(message));
140 }
141
142 if (packet.z) {
143 auto message = make<MouseEvent>(Event::MouseWheel, m_cursor_location, buttons, MouseButton::None, m_modifiers, packet.z);
144 Core::EventLoop::current().post_event(WindowManager::the(), move(message));
145 }
146
147 if (m_cursor_location != prev_location)
148 Compositor::the().invalidate_cursor();
149}
150
151void Screen::on_receive_keyboard_data(::KeyEvent kernel_event)
152{
153 m_modifiers = kernel_event.modifiers();
154 auto message = make<KeyEvent>(kernel_event.is_press() ? Event::KeyDown : Event::KeyUp, kernel_event.key, kernel_event.character, kernel_event.modifiers());
155 Core::EventLoop::current().post_event(WindowManager::the(), move(message));
156}
157
158}