C++ IDWriteFont类代码示例

ULONG GetBestFontAttributes(IDWriteFontCollection* fontCollection, const WCHAR* fontFamilyName, const FontFaceInfo& desiredAttributes)
{
    DWRITE_FONT_WEIGHT  fontWeight  = desiredAttributes.fontWeight;
    DWRITE_FONT_STYLE   fontStyle   = desiredAttributes.fontStyle;
    DWRITE_FONT_STRETCH fontStretch = desiredAttributes.fontStretch;

    IDWriteFontFamily*  fontFamily = NULL;
    IDWriteFont*        font = NULL;

    if (SUCCEEDED(GetFontFamily(fontCollection, fontFamilyName, &fontFamily)))
    {
        if (SUCCEEDED(fontFamily->GetFirstMatchingFont(fontWeight, fontStretch, fontStyle, &font)))
        {
            fontWeight = font->GetWeight();
            fontStyle = font->GetStyle();
            fontStretch = font->GetStretch();
        }
    }

    SafeRelease(&font);
    SafeRelease(&fontFamily);

    FontFaceInfo fontFaceInfo(L"", fontWeight, fontStyle, fontStretch);

    return fontFaceInfo.PackedFontAttributes();
}

    const float getFontHeightToEmSizeFactor(Font& font, IDWriteFontCollection& dwFontCollection)
    {
        // To set the font size factor, we need to get the font metrics
        BOOL fontFound;
        uint32 fontIndex;

        // Search for the font in the font collection using the font name
        HRESULT hr = dwFontCollection.FindFamilyName (font.getTypefaceName().toWideCharPointer(),
                                                      &fontIndex, &fontFound);
        if (! fontFound)
            fontIndex = 0;

        IDWriteFontFamily* dwFontFamily = nullptr;
        hr = dwFontCollection.GetFontFamily (fontIndex, &dwFontFamily);

        IDWriteFont* dwFont = nullptr;
        hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL,
                                                 DWRITE_FONT_STRETCH_NORMAL,
                                                 DWRITE_FONT_STYLE_NORMAL, &dwFont);
        IDWriteFontFace* dwFontFace = nullptr;
        hr = dwFont->CreateFontFace (&dwFontFace);

        // Font metrics are in font design units
        DWRITE_FONT_METRICS dwFontMetrics;
        dwFontFace->GetMetrics (&dwFontMetrics);
        const float totalHeight = std::abs ((float) dwFontMetrics.ascent) + std::abs ((float) dwFontMetrics.descent);
        const float fontHeightToEmSizeFactor = (float) dwFontMetrics.designUnitsPerEm / totalHeight;

        safeRelease (&dwFontFace);
        safeRelease (&dwFont);
        safeRelease (&dwFontFamily);

        return fontHeightToEmSizeFactor;
    }

bool CDirectWriteRenderer::GetFontMetrics(CDirectWriteFont &Font, FontMetrics *pMetrics)
{
	if (pMetrics == nullptr)
		return false;
	if (m_pRenderTarget == nullptr)
		return false;

	HRESULT hr = E_UNEXPECTED;
	IDWriteTextFormat *pTextFormat = Font.GetTextFormat();

	if (pTextFormat != nullptr) {
		IDWriteFontCollection *pFontCollection;

		hr = pTextFormat->GetFontCollection(&pFontCollection);
		if (SUCCEEDED(hr)) {
			WCHAR szName[256];

			hr = pTextFormat->GetFontFamilyName(szName, lengthof(szName));
			if (SUCCEEDED(hr)) {
				UINT32 Index;
				BOOL fExists;

				hr = pFontCollection->FindFamilyName(szName, &Index, &fExists);
				if (SUCCEEDED(hr)) {
					IDWriteFontFamily *pFontFamily;

					hr = pFontCollection->GetFontFamily(Index, &pFontFamily);
					if (SUCCEEDED(hr)) {
						IDWriteFont *pFont;

						hr = pFontFamily->GetFirstMatchingFont(
							pTextFormat->GetFontWeight(),
							pTextFormat->GetFontStretch(),
							pTextFormat->GetFontStyle(),
							&pFont);
						if (SUCCEEDED(hr)) {
							DWRITE_FONT_METRICS Metrics;

							pFont->GetMetrics(&Metrics);
							const float Ratio = pTextFormat->GetFontSize() / static_cast<float>(Metrics.designUnitsPerEm);
							pMetrics->Ascent = Metrics.ascent * Ratio;
							pMetrics->Descent = Metrics.descent * Ratio;
							pMetrics->LineGap = Metrics.lineGap * Ratio;

							pFont->Release();
						}

						pFontFamily->Release();
					}
				}
			}
		}

		pFontCollection->Release();
	}

	return SUCCEEDED(hr);
}

bool TextFormatD2D::GetDWPropertiesFromGDIProperties(
	const WCHAR* gdiFamilyName, const bool gdiBold, const bool gdiItalic,
	DWRITE_FONT_WEIGHT& dwFontWeight, DWRITE_FONT_STYLE& dwFontStyle,
	DWRITE_FONT_STRETCH& dwFontStretch, WCHAR* dwFamilyName, UINT dwFamilyNameSize)
{
	bool result = false;
	IDWriteFont* dwFont = CreateDWFontFromGDIFamilyName(gdiFamilyName);
	if (dwFont)
	{
		if (GetFamilyNameFromDWFont(dwFont, dwFamilyName, dwFamilyNameSize))
		{
			dwFontWeight = dwFont->GetWeight();
			if (gdiBold)
			{
				if (dwFontWeight == DWRITE_FONT_WEIGHT_NORMAL)
				{
					dwFontWeight = DWRITE_FONT_WEIGHT_BOLD;
				}
				else if (dwFontWeight < DWRITE_FONT_WEIGHT_ULTRA_BOLD)
				{
					// If 'gdiFamilyName' was e.g. 'Segoe UI Light', |dwFontWeight| wil be equal to
					// DWRITE_FONT_WEIGHT_LIGHT. If |gdiBold| is true in that case, we need to
					// increase the weight a little more for similar results with GDI+.
					// TODO: Is +100 enough?
					dwFontWeight = (DWRITE_FONT_WEIGHT)(dwFontWeight + 100);
				}
			}

			dwFontStyle = dwFont->GetStyle();
			if (gdiItalic && dwFontStyle == DWRITE_FONT_STYLE_NORMAL)
			{
				dwFontStyle = DWRITE_FONT_STYLE_ITALIC;
			}

			dwFontStretch = dwFont->GetStretch();

			result = true;
		}

		dwFont->Release();
	}

	return result;
}

static void styleChanged(struct fontDialog *f)
{
	LRESULT pos;
	BOOL selected;
	IDWriteFont *font;

	selected = cbGetCurSel(f->styleCombobox, &pos);
	if (!selected)		// on deselect, do nothing
		return;
	f->curStyle = pos;

	font = (IDWriteFont *) cbGetItemData(f->styleCombobox, (WPARAM) (f->curStyle));
	// these are for the nearest match when changing the family; see below
	f->weight = font->GetWeight();
	f->style = font->GetStyle();
	f->stretch = font->GetStretch();

	queueRedrawSampleText(f);
}

HRESULT GetDWritePropertiesFromGDIProperties(
	IDWriteFactory* factory, const WCHAR* gdiFamilyName, const bool gdiBold, const bool gdiItalic,
	DWRITE_FONT_WEIGHT& dwriteFontWeight, DWRITE_FONT_STYLE& dwriteFontStyle,
	DWRITE_FONT_STRETCH& dwriteFontStretch, WCHAR* dwriteFamilyName, UINT dwriteFamilyNameSize)
{
	HRESULT hr = E_FAIL;
	IDWriteFont* dwriteFont = CreateDWriteFontFromGDIFamilyName(factory, gdiFamilyName);
	if (dwriteFont)
	{
		hr = GetFamilyNameFromDWriteFont(dwriteFont, dwriteFamilyName, dwriteFamilyNameSize);
		if (SUCCEEDED(hr))
		{
			GetPropertiesFromDWriteFont(
				dwriteFont, gdiBold, gdiItalic, &dwriteFontWeight, &dwriteFontStyle, &dwriteFontStretch);
		}

		dwriteFont->Release();
	}

	return hr;
}

IDWriteFont* FindDWriteFontInFontFamilyByGDIFamilyName(
	IDWriteFontFamily* fontFamily, const WCHAR* gdiFamilyName)
{
	const UINT32 fontFamilyFontCount = fontFamily->GetFontCount();
	for (UINT32 j = 0; j < fontFamilyFontCount; ++j)
	{
		IDWriteFont* font;
		HRESULT hr = fontFamily->GetFont(j, &font);
		if (SUCCEEDED(hr))
		{
			WCHAR buffer[LF_FACESIZE];
			hr = GetGDIFamilyNameFromDWriteFont(font, buffer, _countof(buffer));
			if (SUCCEEDED(hr) && _wcsicmp(gdiFamilyName, buffer) == 0)
			{
				return font;
			}

			font->Release();
		}
	}

	return nullptr;
}

    //==================================================================================================
    static float getFontHeightToEmSizeFactor (IDWriteFont& dwFont)
    {
        ComSmartPtr<IDWriteFontFace> dwFontFace;
        dwFont.CreateFontFace (dwFontFace.resetAndGetPointerAddress());

        if (dwFontFace == nullptr)
            return 1.0f;

        DWRITE_FONT_METRICS dwFontMetrics;
        dwFontFace->GetMetrics (&dwFontMetrics);

        const float totalHeight = (float) (std::abs (dwFontMetrics.ascent) + std::abs (dwFontMetrics.descent));
        return dwFontMetrics.designUnitsPerEm / totalHeight;
    }

static QFontEngine *loadEngine(int script, const QFontDef &request,
                               HDC fontHdc, int dpi, bool rawMode,
                               const QtFontDesc *desc,
                               const QStringList &family_list)
{
    LOGFONT lf;
    memset(&lf, 0, sizeof(LOGFONT));

    bool useDevice = (request.styleStrategy & QFont::PreferDevice) && fontHdc;

    HDC hdc = shared_dc();
    QString font_name = desc != 0 ? desc->family->name : request.family;

    if (useDevice) {
        hdc = fontHdc;
        font_name = request.family;
    }

    bool stockFont = false;
    bool preferClearTypeAA = false;

    HFONT hfont = 0;


#if !defined(QT_NO_DIRECTWRITE)
    bool useDirectWrite = (request.hintingPreference == QFont::PreferNoHinting)
                       || (request.hintingPreference == QFont::PreferVerticalHinting);
    IDWriteFont *directWriteFont = 0;
#else
    bool useDirectWrite = false;
#endif

    if (rawMode) {                        // will choose a stock font
        int f, deffnt = SYSTEM_FONT;
        QString fam = desc != 0 ? desc->family->name.toLower() : request.family.toLower();
        if (fam == QLatin1String("default"))
            f = deffnt;
        else if (fam == QLatin1String("system"))
            f = SYSTEM_FONT;
#ifndef Q_WS_WINCE
        else if (fam == QLatin1String("system_fixed"))
            f = SYSTEM_FIXED_FONT;
        else if (fam == QLatin1String("ansi_fixed"))
            f = ANSI_FIXED_FONT;
        else if (fam == QLatin1String("ansi_var"))
            f = ANSI_VAR_FONT;
        else if (fam == QLatin1String("device_default"))
            f = DEVICE_DEFAULT_FONT;
        else if (fam == QLatin1String("oem_fixed"))
            f = OEM_FIXED_FONT;
#endif
        else if (fam[0] == QLatin1Char('#'))
            f = fam.right(fam.length()-1).toInt();
        else
            f = deffnt;
        hfont = (HFONT)GetStockObject(f);
        if (!hfont) {
            qErrnoWarning("QFontEngine::loadEngine: GetStockObject failed");
            hfont = systemFont();
        }
        stockFont = true;
    } else {

        int hint = FF_DONTCARE;
        switch (request.styleHint) {
            case QFont::Helvetica:
                hint = FF_SWISS;
                break;
            case QFont::Times:
                hint = FF_ROMAN;
                break;
            case QFont::Courier:
                hint = FF_MODERN;
                break;
            case QFont::OldEnglish:
                hint = FF_DECORATIVE;
                break;
            case QFont::System:
                hint = FF_MODERN;
                break;
            default:
                break;
        }

        lf.lfHeight = -qRound(request.pixelSize);
        lf.lfWidth                = 0;
        lf.lfEscapement        = 0;
        lf.lfOrientation        = 0;
        if (desc == 0 || desc->style->key.weight == 50)
            lf.lfWeight = FW_DONTCARE;
        else
            lf.lfWeight = (desc->style->key.weight*900)/99;
        lf.lfItalic         = (desc != 0 && desc->style->key.style != QFont::StyleNormal);
        lf.lfCharSet        = DEFAULT_CHARSET;

        int strat = OUT_DEFAULT_PRECIS;
        if (request.styleStrategy & QFont::PreferBitmap) {
            strat = OUT_RASTER_PRECIS;
#ifndef Q_WS_WINCE
        } else if (request.styleStrategy & QFont::PreferDevice) {
//.........这里部分代码省略.........

HRESULT DWriteCreateResources(HDC hdc, wchar_t *text, HFONT hfont)
{
    HRESULT hr = S_OK;

    // If the DirectWrite factory doesn't exist, create the resources,
    // only create these resources once.
    if (!g_pDWriteFactory)
    {
        HWND hwnd;
        RECT r;

        // DirectWrite variables.
        IDWriteFontFamily* pFontFamily = NULL;
        IDWriteFont* pFont = NULL;
        IDWriteLocalizedStrings* pFamilyNames = NULL;
        
        // Logical (GDI) font.
        LOGFONT lf = {};

        UINT32 length = 0;
        UINT32 index = 0;
        float fontSize = 0;

        // length of the string
        UINT32 textLength = 0;

        wchar_t *name = NULL;

        // Get a handle to the DC and the window rect.
        hwnd = WindowFromDC(hdc);
        GetClientRect(hwnd, &r);

        // Calculate the string length.
        textLength = UINT32(wcslen(text));

        // Create the DirectWrite factory.
        hr = DWriteCreateFactory(
            DWRITE_FACTORY_TYPE_SHARED,
            __uuidof(IDWriteFactory),
            reinterpret_cast<IUnknown**>(&g_pDWriteFactory)
            );

        // Create a GDI interop interface.
        if (SUCCEEDED(hr))
        {
            hr = g_pDWriteFactory->GetGdiInterop(&g_pGdiInterop);
        }
        
        if (SUCCEEDED(hr))
        {
            // Get a logical font from the font handle.
            GetObject(hfont, sizeof(LOGFONT), &lf);
        }

        // Convert to a DirectWrite font.
        if (SUCCEEDED(hr))
        {
            hr = g_pGdiInterop->CreateFontFromLOGFONT(&lf, &pFont);
        }
        
        // Get the font family.
        if (SUCCEEDED(hr))
        {
            hr = pFont->GetFontFamily(&pFontFamily);
        }

        // Get a list of localized family names.
        if (SUCCEEDED(hr))
        {
            hr = pFontFamily->GetFamilyNames(&pFamilyNames);
        }

        // Select the first locale.  This is OK, because we are not displaying the family name.
        index = 0;
        
        // Get the length of the family name.
        if (SUCCEEDED(hr))
        {
            hr = pFamilyNames->GetStringLength(index, &length);
        }

        if (SUCCEEDED(hr))
        {
            // Allocate a new string.
            name = new (std::nothrow) wchar_t[length+1];
		    if (name == NULL)
            {
			    hr = E_OUTOFMEMORY;
            }
        }

        // Get the actual family name.
        if (SUCCEEDED(hr))
        {
            hr = pFamilyNames->GetString(index, name, length+1);
        }

        if (SUCCEEDED(hr))
        {
            // Calculate the font size.
//.........这里部分代码省略.........

    HRESULT
DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize)
{
    // Most of this function is copy from: http://msdn.microsoft.com/en-us/library/windows/desktop/dd941783(v=vs.85).aspx
    HRESULT hr = S_OK;

    IDWriteFont *font = NULL;
    IDWriteFontFamily *fontFamily = NULL;
    IDWriteLocalizedStrings *localizedFamilyNames = NULL;

    if (SUCCEEDED(hr))
    {
	hr = mGdiInterop->CreateFontFromLOGFONT(&logFont, &font);
    }

    // Get the font family to which this font belongs.
    if (SUCCEEDED(hr))
    {
	hr = font->GetFontFamily(&fontFamily);
    }

    // Get the family names. This returns an object that encapsulates one or
    // more names with the same meaning but in different languages.
    if (SUCCEEDED(hr))
    {
	hr = fontFamily->GetFamilyNames(&localizedFamilyNames);
    }

    // Get the family name at index zero. If we were going to display the name
    // we'd want to try to find one that matched the use locale, but for
    // purposes of creating a text format object any language will do.

    wchar_t familyName[100];
    if (SUCCEEDED(hr))
    {
	hr = localizedFamilyNames->GetString(0, familyName,
		ARRAYSIZE(familyName));
    }

    if (SUCCEEDED(hr))
    {
	// If no font size was passed in use the lfHeight of the LOGFONT.
	if (fontSize == 0)
	{
	    // Convert from pixels to DIPs.
	    fontSize = PixelsToDipsY(logFont.lfHeight);
	    if (fontSize < 0)
	    {
		// Negative lfHeight represents the size of the em unit.
		fontSize = -fontSize;
	    }
	    else
	    {
		// Positive lfHeight represents the cell height (ascent +
		// descent).
		DWRITE_FONT_METRICS fontMetrics;
		font->GetMetrics(&fontMetrics);

		// Convert the cell height (ascent + descent) from design units
		// to ems.
		float cellHeight = static_cast<float>(
			fontMetrics.ascent + fontMetrics.descent)
					       / fontMetrics.designUnitsPerEm;

		// Divide the font size by the cell height to get the font em
		// size.
		fontSize /= cellHeight;
	    }
	}
    }

    // The text format includes a locale name. Ideally, this would be the
    // language of the text, which may or may not be the same as the primary
    // language of the user. However, for our purposes the user locale will do.
    wchar_t localeName[LOCALE_NAME_MAX_LENGTH];
    if (SUCCEEDED(hr))
    {
	if (GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH) == 0)
	    hr = HRESULT_FROM_WIN32(GetLastError());
    }

    if (SUCCEEDED(hr))
    {
	// Create the text format object.
	hr = mDWriteFactory->CreateTextFormat(
		familyName,
		NULL, // no custom font collection
		font->GetWeight(),
		font->GetStyle(),
		font->GetStretch(),
		fontSize,
		localeName,
		&mTextFormat);
    }

    if (SUCCEEDED(hr))
    {
	mFontWeight = static_cast<DWRITE_FONT_WEIGHT>(logFont.lfWeight);
	mFontStyle = logFont.lfItalic ? DWRITE_FONT_STYLE_ITALIC
	    : DWRITE_FONT_STYLE_NORMAL;
//.........这里部分代码省略.........

void TextFormatD2D::SetProperties(
	const WCHAR* fontFamily, int size, bool bold, bool italic,
	const FontCollection* fontCollection)
{
	auto fontCollectionD2D = (FontCollectionD2D*)fontCollection;

	Dispose();

	WCHAR dwriteFamilyName[LF_FACESIZE];
	DWRITE_FONT_WEIGHT dwriteFontWeight =
		bold ? DWRITE_FONT_WEIGHT_BOLD : DWRITE_FONT_WEIGHT_REGULAR;
	DWRITE_FONT_STYLE dwriteFontStyle =
		italic ? DWRITE_FONT_STYLE_ITALIC : DWRITE_FONT_STYLE_NORMAL;
	DWRITE_FONT_STRETCH dwriteFontStretch = DWRITE_FONT_STRETCH_NORMAL;
	const float dwriteFontSize = size * (4.0f / 3.0f);

	// |fontFamily| uses the GDI/GDI+ font naming convention so try to create DirectWrite font
	// using the GDI family name and then create a text format using the DirectWrite family name
	// obtained from it.
	HRESULT hr = Util::GetDWritePropertiesFromGDIProperties(
		CanvasD2D::c_DWFactory.Get(), fontFamily, bold, italic, dwriteFontWeight, dwriteFontStyle,
		dwriteFontStretch, dwriteFamilyName, _countof(dwriteFamilyName));
	if (SUCCEEDED(hr))
	{
		hr = CanvasD2D::c_DWFactory->CreateTextFormat(
			dwriteFamilyName,
			nullptr,
			dwriteFontWeight,
			dwriteFontStyle,
			dwriteFontStretch,
			dwriteFontSize,
			L"",
			&m_TextFormat);
	}

	if (FAILED(hr))
	{
		IDWriteFontCollection* dwriteFontCollection = nullptr;

		// If |fontFamily| is not in the system collection, use the font collection from
		// |fontCollectionD2D| if possible.
		if (!Util::IsFamilyInSystemFontCollection(CanvasD2D::c_DWFactory.Get(), fontFamily) &&
			(fontCollectionD2D && fontCollectionD2D->InitializeCollection()))
		{
			IDWriteFont* dwriteFont = Util::FindDWriteFontInFontCollectionByGDIFamilyName(
				fontCollectionD2D->m_Collection, fontFamily);
			if (dwriteFont)
			{
				hr = Util::GetFamilyNameFromDWriteFont(
					dwriteFont, dwriteFamilyName, _countof(dwriteFamilyName));
				if (SUCCEEDED(hr))
				{
					fontFamily = dwriteFamilyName;
					Util::GetPropertiesFromDWriteFont(
						dwriteFont, bold, italic, &dwriteFontWeight, &dwriteFontStyle,
						&dwriteFontStretch);
				}

				dwriteFont->Release();
			}

			dwriteFontCollection = fontCollectionD2D->m_Collection;
		}

		// Fallback in case above fails.
		hr = CanvasD2D::c_DWFactory->CreateTextFormat(
			fontFamily,
			dwriteFontCollection,
			dwriteFontWeight,
			dwriteFontStyle,
			dwriteFontStretch,
			dwriteFontSize,
			L"",
			&m_TextFormat);
	}

	if (SUCCEEDED(hr))
	{
		SetHorizontalAlignment(GetHorizontalAlignment());
		SetVerticalAlignment(GetVerticalAlignment());

		// Get the family name to in case CreateTextFormat() fallbacked on some other family name.
		hr = m_TextFormat->GetFontFamilyName(dwriteFamilyName, _countof(dwriteFamilyName));
		if (FAILED(hr)) return;

		Microsoft::WRL::ComPtr<IDWriteFontCollection> collection;
		Microsoft::WRL::ComPtr<IDWriteFontFamily> fontFamily;
		UINT32 familyNameIndex;
		BOOL exists;
		if (FAILED(m_TextFormat->GetFontCollection(collection.GetAddressOf())) ||
			FAILED(collection->FindFamilyName(dwriteFamilyName, &familyNameIndex, &exists)) ||
			FAILED(collection->GetFontFamily(familyNameIndex, fontFamily.GetAddressOf())))
		{
			return;
		}

		Microsoft::WRL::ComPtr<IDWriteFont> font;
		hr = fontFamily->GetFirstMatchingFont(
			m_TextFormat->GetFontWeight(),
			m_TextFormat->GetFontStretch(),
//.........这里部分代码省略.........

static void fontDialogDrawSampleText(struct fontDialog *f, ID2D1RenderTarget *rt)
{
	D2D1_COLOR_F color;
	D2D1_BRUSH_PROPERTIES props;
	ID2D1SolidColorBrush *black;
	IDWriteFont *font;
	IDWriteLocalizedStrings *sampleStrings;
	BOOL exists;
	WCHAR *sample;
	WCHAR *family;
	IDWriteTextFormat *format;
	D2D1_RECT_F rect;
	HRESULT hr;

	color.r = 0.0;
	color.g = 0.0;
	color.b = 0.0;
	color.a = 1.0;
	ZeroMemory(&props, sizeof (D2D1_BRUSH_PROPERTIES));
	props.opacity = 1.0;
	// identity matrix
	props.transform._11 = 1;
	props.transform._22 = 1;
	hr = rt->CreateSolidColorBrush(
		&color,
		&props,
		&black);
	if (hr != S_OK)
		logHRESULT(L"error creating solid brush", hr);

	font = (IDWriteFont *) cbGetItemData(f->styleCombobox, (WPARAM) f->curStyle);
	hr = font->GetInformationalStrings(DWRITE_INFORMATIONAL_STRING_SAMPLE_TEXT, &sampleStrings, &exists);
	if (hr != S_OK)
		exists = FALSE;
	if (exists) {
		sample = fontCollectionCorrectString(f->fc, sampleStrings);
		sampleStrings->Release();
	} else
		sample = L"The quick brown fox jumps over the lazy dog.";

	// DirectWrite doesn't allow creating a text format from a font; we need to get this ourselves
	family = cbGetItemText(f->familyCombobox, f->curFamily);
	hr = dwfactory->CreateTextFormat(family,
		NULL,
		font->GetWeight(),
		font->GetStyle(),
		font->GetStretch(),
		// typographic points are 1/72 inch; this parameter is 1/96 inch
		// fortunately Microsoft does this too, in https://msdn.microsoft.com/en-us/library/windows/desktop/dd371554%28v=vs.85%29.aspx
		f->curSize * (96.0 / 72.0),
		// see http://stackoverflow.com/questions/28397971/idwritefactorycreatetextformat-failing and https://msdn.microsoft.com/en-us/library/windows/desktop/dd368203.aspx
		// TODO use the current locale again?
		L"",
		&format);
	if (hr != S_OK)
		logHRESULT(L"error creating IDWriteTextFormat", hr);
	uiFree(family);

	rect.left = 0;
	rect.top = 0;
	rect.right = realGetSize(rt).width;
	rect.bottom = realGetSize(rt).height;
	rt->DrawText(sample, wcslen(sample),
		format,
		&rect,
		black,
		// TODO really?
		D2D1_DRAW_TEXT_OPTIONS_NONE,
		DWRITE_MEASURING_MODE_NATURAL);

	format->Release();
	if (exists)
		uiFree(sample);
	black->Release();
}

int main(void)
{
	int argc;
	LPWSTR *argv;
	WCHAR *fontname, *string;
	int len;
	HDC dc;
	HFONT font, prevfont;
	IDWriteFontCollection *sysfc;
	UINT32 index;
	BOOL exists;
	IDWriteFontFamily *dwfamily;
	IDWriteFont *dwfont;
	IDWriteFontFace *dwface;
	featurePreparer *features;
	HRESULT hr;

	// TODO would using wmain() be adequate?
	argv = CommandLineToArgvW(GetCommandLineW(), &argc);
	if (argv == NULL)
		dieLE("error getting command-line arguments");
	if (argc != 3) {
		fprintf(stderr, "usage: %ws font string\n", argv[0]);
		return 1;
	}
	fontname = argv[1];
	string = argv[2];
	len = wcslen(string);

	// DirectWrite requires COM
	hr = CoInitialize(NULL);
	if (hr != S_OK)
		die("error initializing COM", hr);
	// Uniscribe requires a device context with the font to use
	dc = GetDC(NULL);
	if (dc == NULL)
		dieLE("error getting screen HDC for Uniscribe");
	// TODO DEFAULT_CHARSET might affect the results we get
	font = CreateFontW(0, 0, 0, 0, 0, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, fontname);
	if (font == NULL)
		dieLE("error creating font for Uniscribe");
	prevfont = (HFONT) SelectObject(dc, font);
	if (prevfont == NULL)
		dieLE("error selecting font into HDC for Uniscribe");
	// and initialize DirectWrite
	hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED,
		__uuidof (IDWriteFactory),
		(IUnknown **) (&dwfactory));
	if (hr != S_OK)
		die("error initializing DirectWrite", hr);
	// and load the font *there*
	hr = dwfactory->GetSystemFontCollection(&sysfc, TRUE);
	if (hr != S_OK)
		die("error loading DirectWrite system font collection", hr);
	hr = sysfc->FindFamilyName(fontname, &index, &exists);
	if (hr != S_OK)
		die("error finding DirectWrite font family", hr);
	if (!exists)
		die("font not found in DirectWrite system font collection", E_FAIL);
	hr = sysfc->GetFontFamily(index, &dwfamily);
	if (hr != S_OK)
		die("error loading DirectWrite font family", hr);
	hr = dwfamily->GetFirstMatchingFont(DWRITE_FONT_WEIGHT_NORMAL,
		DWRITE_FONT_STRETCH_NORMAL,
		DWRITE_FONT_STYLE_NORMAL,
		&dwfont);
	if (hr != S_OK)
		die("error loading DirectWrite font object", hr);
	hr = dwfont->CreateFontFace(&dwface);
	if (hr != S_OK)
		die("error creating DirectWrite font face", hr);

	// first, uniscribe only; no features are used
//	uniscribeTest(dc, string, len, NULL,
//		doScriptItemize, doScriptShape, "Uniscribe");

	// next, unprepared features (NULL values)
	features = new featurePreparer;
//features->add('z','e','r','o',1);
//features->add('f','r','a','c',1);features->prepare(len);
//	uniscribeTest(dc, string, len, features,
//		doScriptItemizeOpenType, doScriptShapeOpenType, "Uniscribe OpenType");
	directwriteAnalyzerTest(dwface, string, len, features);
	delete features;

	dwface->Release();
	dwfont->Release();
	dwfamily->Release();
	sysfc->Release();
	dwfactory->Release();
	SelectObject(dc, prevfont);
	DeleteObject(font);
	ReleaseDC(NULL, dc);
	CoUninitialize();
	return 0;
}