120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
#include "Window.h"
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#include <BAN/Debug.h>
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#include <LibGUI/Window.h>
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#include <sys/shm.h>
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#include <sys/socket.h>
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#include <unistd.h>
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Window::~Window()
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{
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shmdt(m_fb_addr);
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LibGUI::EventPacket::DestroyWindowEvent packet;
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BAN::Vector<uint8_t> buffer;
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if (!buffer.resize(packet.serialized_size()).is_error())
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{
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packet.serialize(buffer.span());
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size_t total_sent = 0;
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while (total_sent < buffer.size())
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{
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const ssize_t nsend = send(m_client_fd, buffer.data() + total_sent, buffer.size() - total_sent, 0);
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if (nsend <= 0)
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break;
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total_sent += nsend;
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}
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}
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}
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BAN::ErrorOr<void> Window::initialize(BAN::StringView title, uint32_t width, uint32_t height)
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{
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m_title.clear();
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TRY(m_title.append(title));
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TRY(resize(width, height));
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return {};
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}
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BAN::ErrorOr<void> Window::resize(uint32_t width, uint32_t height)
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{
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const size_t fb_bytes = width * height * 4;
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const int shmid = shmget(IPC_PRIVATE, fb_bytes, 0666);
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if (shmid == -1)
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return BAN::Error::from_errno(errno);
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uint32_t* fb_addr = static_cast<uint32_t*>(shmat(shmid, nullptr, 0));
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shmctl(shmid, IPC_RMID, nullptr);
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if (fb_addr == SHM_FAILED)
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return BAN::Error::from_errno(errno);
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memset(fb_addr, 0xFF, fb_bytes);
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{
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const auto old_area = m_client_area;
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m_client_area.max_x = m_client_area.min_x + width;
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m_client_area.max_y = m_client_area.min_y + height;
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auto title_bar_ret = prepare_title_bar();
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m_client_area = old_area;
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if (title_bar_ret.is_error())
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{
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shmdt(fb_addr);
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return title_bar_ret.release_error();
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}
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}
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if (m_fb_addr != nullptr)
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shmdt(m_fb_addr);
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m_fb_addr = fb_addr;
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m_shmid = shmid;
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m_client_area.max_x = m_client_area.min_x + width;
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m_client_area.max_y = m_client_area.min_y + height;
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return {};
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}
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BAN::ErrorOr<void> Window::prepare_title_bar()
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{
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const uint32_t font_w = m_font.width();
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const uint32_t font_h = m_font.height();
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const uint32_t font_p = m_font.pitch();
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TRY(m_title_bar_data.resize(title_bar_width() * title_bar_height()));
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for (auto& pixel : m_title_bar_data)
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pixel = 0xFFFFFFFF;
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const auto text_area = title_text_area();
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for (size_t i = 0; i < m_title.size() && (i + 1) * font_w < static_cast<uint32_t>(text_area.width()); i++)
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{
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const auto* glyph = m_font.glyph(m_title[i]);
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if (glyph == nullptr)
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continue;
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const int32_t y_off = (font_h < (uint32_t)title_bar_height()) ? (title_bar_height() - font_h) / 2 : 0;
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const int32_t x_off = y_off + i * font_w;
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for (int32_t y = 0; (uint32_t)y < font_h; y++)
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{
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if (y + y_off >= title_bar_height())
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break;
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for (int32_t x = 0; (uint32_t)x < font_w; x++)
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{
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if (x + x_off >= text_area.width())
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break;
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const uint8_t bitmask = 1 << (font_w - x - 1);
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if (glyph[y * font_p] & bitmask)
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m_title_bar_data[(y_off + y) * title_bar_width() + (x_off + x)] = 0xFF000000;
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}
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}
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}
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return {};
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}
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