forked from Bananymous/banan-os
111 lines
2.7 KiB
C++
111 lines
2.7 KiB
C++
#include "Window.h"
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#include <BAN/Debug.h>
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#include <BAN/ScopeGuard.h>
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#include <LibGUI/Window.h>
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#include <sys/banan-os.h>
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#include <sys/mman.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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munmap(m_fb_addr, client_width() * client_height() * 4);
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smo_delete(m_smo_key);
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LibGUI::EventPacket::DestroyWindowEvent packet;
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(void)packet.send_serialized(m_client_fd);
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close(m_client_fd);
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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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long smo_key = smo_create(fb_bytes, PROT_READ | PROT_WRITE);
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if (smo_key == -1)
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return BAN::Error::from_errno(errno);
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BAN::ScopeGuard smo_deleter([&]() { smo_delete(smo_key); });
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uint32_t* fb_addr = static_cast<uint32_t*>(smo_map(smo_key));
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if (fb_addr == nullptr)
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return BAN::Error::from_errno(errno);
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memset(fb_addr, 0xFF, fb_bytes);
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BAN::ScopeGuard smo_unmapper([&]() { munmap(fb_addr, fb_bytes); });
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{
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const auto old_area = m_client_area;
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m_client_area.width = width;
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m_client_area.height = 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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return title_bar_ret.release_error();
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}
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smo_deleter.disable();
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smo_unmapper.disable();
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if (m_fb_addr)
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munmap(m_fb_addr, client_width() * client_height() * 4);
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if (m_smo_key)
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smo_delete(m_smo_key);
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m_fb_addr = fb_addr;
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m_smo_key = smo_key;
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m_client_area.width = width;
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m_client_area.height = 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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