banan-os/userspace/WindowServer/Window.cpp

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#include "Window.h"
#include <BAN/Debug.h>
#include <LibGUI/Window.h>
#include <sys/banan-os.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <unistd.h>
Window::Window(int fd, Rectangle area, long smo_key, BAN::StringView title, const LibFont::Font& font)
: m_client_fd(fd)
, m_client_area(area)
, m_smo_key(smo_key)
{
MUST(m_title.append(title));
prepare_title_bar(font);
m_fb_addr = static_cast<uint32_t*>(smo_map(smo_key));
ASSERT(m_fb_addr);
memset(m_fb_addr, 0, client_width() * client_height() * 4);
}
Window::~Window()
{
munmap(m_fb_addr, client_width() * client_height() * 4);
smo_delete(m_smo_key);
LibGUI::EventPacket event;
event.type = LibGUI::EventPacket::Type::DestroyWindow;
send(m_client_fd, &event, sizeof(event), 0);
close(m_client_fd);
}
void Window::prepare_title_bar(const LibFont::Font& font)
{
const size_t title_bar_bytes = title_bar_width() * title_bar_height() * 4;
uint32_t* title_bar_data = new uint32_t[title_bar_bytes];
ASSERT(title_bar_data);
for (size_t i = 0; i < title_bar_bytes; i++)
title_bar_data[i] = 0xFFFFFF;
const auto text_area = title_text_area();
for (size_t i = 0; i < m_title.size() && (i + 1) * font.width() < static_cast<uint32_t>(text_area.width); i++)
{
const auto* glyph = font.glyph(m_title[i]);
if (glyph == nullptr)
continue;
const int32_t y_off = (font.height() < (uint32_t)title_bar_height()) ? (title_bar_height() - font.height()) / 2 : 0;
const int32_t x_off = y_off + i * font.width();
for (int32_t y = 0; (uint32_t)y < font.height(); y++)
{
if (y + y_off >= title_bar_height())
break;
for (int32_t x = 0; (uint32_t)x < font.width(); x++)
{
if (x + x_off >= text_area.width)
break;
const uint8_t bitmask = 1 << (font.width() - x - 1);
if (glyph[y * font.pitch()] & bitmask)
title_bar_data[(y_off + y) * title_bar_width() + (x_off + x)] = 0x000000;
}
}
}
if (m_title_bar_data)
delete[] m_title_bar_data;
m_title_bar_data = title_bar_data;
}