Method Initialize

Source/D3DUtil/FontBitmap.h:84–215

	}

	HRESULT Initialize(const WCHAR* fontName, const int fontHeight, UINT fontFlags, const WCHAR* chars, UINT length)
	{
		DeleteObject(m_hBitmap);
		m_pBitmapBits = nullptr;
		m_charCoords.clear();

		HRESULT hr = S_OK;

		// Create a font. By specifying ANTIALIASED_QUALITY, we might get an
		// antialiased font, but this is not guaranteed.
		HFONT hFont = CreateFontW(
			fontHeight, 0, 0, 0,
			(fontFlags & D3DFONT_BOLD)   ? FW_BOLD : FW_NORMAL,
			(fontFlags & D3DFONT_ITALIC) ? TRUE    : FALSE,
			FALSE, FALSE,
			DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
			CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY,
			DEFAULT_PITCH, fontName);

		HDC hDC = CreateCompatibleDC(nullptr);
		SetMapMode(hDC, MM_TEXT);
		HFONT hFontOld = (HFONT)SelectObject(hDC, hFont);

		std::vector<SIZE> charSizes;
		charSizes.reserve(length);
		SIZE size;
		LONG maxWidth = 0;
		LONG maxHeight = 0;
		for (UINT i = 0; i < length; i++) {
			if (GetTextExtentPoint32W(hDC, &chars[i], 1, &size) == FALSE) {
				hr = E_FAIL;
				break;
			}
			charSizes.emplace_back(size);

			if (size.cx > maxWidth) {
				maxWidth = size.cx;
			}
			if (size.cy > maxHeight) {
				maxHeight = size.cy;
			}
		}

		if (S_OK == hr) {
			m_MaxCharMetric = { maxWidth, maxHeight };
			UINT stepX = m_MaxCharMetric.cx + 2;
			UINT stepY = m_MaxCharMetric.cy;
			UINT bmWidth = 128;
			UINT bmHeight = 128;
			UINT columns = bmWidth / stepX;
			UINT lines = bmHeight / stepY;

			while (length > lines * columns) {
				if (bmWidth <= bmHeight) {
					bmWidth *= 2;
				} else {
					bmHeight += 128;
				}