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#include "WSCompositor.h"
#include "WSEvent.h"
#include "WSEventLoop.h"
#include "WSScreen.h"
#include "WSWindowManager.h"
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
static WSScreen* s_the;
WSScreen& WSScreen::the()
{
ASSERT(s_the);
return *s_the;
}
WSScreen::WSScreen(unsigned width, unsigned height)
: m_width(width)
, m_height(height)
{
ASSERT(!s_the);
s_the = this;
m_cursor_location = rect().center();
m_framebuffer_fd = open("/dev/bxvga", O_RDWR);
ASSERT(m_framebuffer_fd >= 0);
set_resolution(width, height);
}
WSScreen::~WSScreen()
{
}
void WSScreen::set_resolution(int width, int height)
{
struct BXVGAResolution {
int width;
int height;
};
BXVGAResolution resolution { (int)width, (int)height};
int rc = ioctl(m_framebuffer_fd, 1985, (int)&resolution);
ASSERT(rc == 0);
if (m_framebuffer) {
size_t previous_size_in_bytes = m_width * m_height * sizeof(RGBA32) * 2;
int rc = munmap(m_framebuffer, previous_size_in_bytes);
ASSERT(rc == 0);
}
size_t framebuffer_size_in_bytes = width * height * sizeof(RGBA32) * 2;
m_framebuffer = (RGBA32*)mmap(nullptr, framebuffer_size_in_bytes, PROT_READ | PROT_WRITE, MAP_SHARED, m_framebuffer_fd, 0);
ASSERT(m_framebuffer && m_framebuffer != (void*)-1);
m_width = width;
m_height = height;
m_cursor_location.constrain(rect());
}
void WSScreen::on_receive_mouse_data(int dx, int dy, int dz, unsigned buttons)
{
auto prev_location = m_cursor_location;
m_cursor_location.move_by(dx, dy);
m_cursor_location.constrain(rect());
unsigned prev_buttons = m_mouse_button_state;
m_mouse_button_state = buttons;
unsigned changed_buttons = prev_buttons ^ buttons;
auto post_mousedown_or_mouseup_if_needed = [&] (MouseButton button) {
if (!(changed_buttons & (unsigned)button))
return;
auto message = make<WSMouseEvent>(buttons & (unsigned)button ? WSEvent::MouseDown : WSEvent::MouseUp, m_cursor_location, buttons, button, m_modifiers);
WSEventLoop::the().post_event(WSWindowManager::the(), move(message));
};
post_mousedown_or_mouseup_if_needed(MouseButton::Left);
post_mousedown_or_mouseup_if_needed(MouseButton::Right);
post_mousedown_or_mouseup_if_needed(MouseButton::Middle);
if (m_cursor_location != prev_location) {
auto message = make<WSMouseEvent>(WSEvent::MouseMove, m_cursor_location, buttons, MouseButton::None, m_modifiers);
WSEventLoop::the().post_event(WSWindowManager::the(), move(message));
}
if (dz) {
auto message = make<WSMouseEvent>(WSEvent::MouseWheel, m_cursor_location, buttons, MouseButton::None, m_modifiers, dz);
WSEventLoop::the().post_event(WSWindowManager::the(), move(message));
}
if (m_cursor_location != prev_location)
WSCompositor::the().invalidate_cursor();
}
void WSScreen::on_receive_keyboard_data(KeyEvent kernel_event)
{
m_modifiers = kernel_event.modifiers();
auto message = make<WSKeyEvent>(kernel_event.is_press() ? WSEvent::KeyDown : WSEvent::KeyUp, kernel_event.key, kernel_event.character, kernel_event.modifiers());
WSEventLoop::the().post_event(WSWindowManager::the(), move(message));
}
void WSScreen::set_y_offset(int offset)
{
int rc = ioctl(m_framebuffer_fd, 1982, offset);
ASSERT(rc == 0);
}
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