Method m_getIcon

ImFileDialog.cpp:705–821

	}

	void* FileDialog::m_getIcon(const std::filesystem::path& path)
	{
#ifdef _WIN32
		if (m_icons.count(path.u8string()) > 0)
			return m_icons[path.u8string()];

		std::string pathU8 = path.u8string();

		std::error_code ec;
		m_icons[pathU8] = nullptr;

		DWORD attrs = 0;
		UINT flags = SHGFI_ICON | SHGFI_LARGEICON;
		if (!std::filesystem::exists(path, ec)) {
			flags |= SHGFI_USEFILEATTRIBUTES;
			attrs = FILE_ATTRIBUTE_DIRECTORY;
		}

		SHFILEINFOW fileInfo = { 0 };
		std::wstring pathW = path.wstring();
		for (int i = 0; i < pathW.size(); i++)
			if (pathW[i] == '/')
				pathW[i] = '\\';
		SHGetFileInfoW(pathW.c_str(), attrs, &fileInfo, sizeof(SHFILEINFOW), flags);

		if (fileInfo.hIcon == nullptr)
			return nullptr;

		// check if icon is already loaded
		auto itr = std::find(m_iconIndices.begin(), m_iconIndices.end(), fileInfo.iIcon);
		if (itr != m_iconIndices.end()) {
			const std::string& existingIconFilepath = m_iconFilepaths[itr - m_iconIndices.begin()];
			m_icons[pathU8] = m_icons[existingIconFilepath];
			return m_icons[pathU8];
		}

		m_iconIndices.push_back(fileInfo.iIcon);
		m_iconFilepaths.push_back(pathU8);

		ICONINFO iconInfo = { 0 };
		GetIconInfo(fileInfo.hIcon, &iconInfo);
		
		if (iconInfo.hbmColor == nullptr)
			return nullptr;

		DIBSECTION ds;
		GetObject(iconInfo.hbmColor, sizeof(ds), &ds);
		int byteSize = ds.dsBm.bmWidth * ds.dsBm.bmHeight * (ds.dsBm.bmBitsPixel / 8);

		if (byteSize == 0)
			return nullptr;

		uint8_t* data = (uint8_t*)malloc(byteSize);
		GetBitmapBits(iconInfo.hbmColor, byteSize, data);

		m_icons[pathU8] = this->CreateTexture(data, ds.dsBm.bmWidth, ds.dsBm.bmHeight, 0);

		free(data);