text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "ui/gfx/platform_font_win.h"
  
  #include <algorithm>
  #include <dwrite.h>
  #include <math.h>
  #include <windows.h>
  
  #include "base/debug/alias.h"
  #include "base/logging.h"
  #include "base/macros.h"
  #include "base/strings/string_util.h"
  #include "base/strings/sys_string_conversions.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/win/scoped_comptr.h"
  #include "base/win/scoped_gdi_object.h"
  #include "base/win/scoped_hdc.h"
  #include "base/win/scoped_select_object.h"
  #include "base/win/win_util.h"
  #include "third_party/skia/include/core/SkTypeface.h"
  #include "ui/gfx/canvas.h"
  #include "ui/gfx/font.h"
  #include "ui/gfx/font_render_params.h"
  #include "ui/gfx/win/scoped_set_map_mode.h"
  #include "ui/gfx/win/dpi.h"
  
  namespace {
  
  // If the tmWeight field of a TEXTMETRIC structure has a value >= this, the
  // font is bold.
  const int kTextMetricWeightBold = 700;
  
  // Returns the minimum font size, using the minimum size callback, if set.
  int GetMinimumFontSize() {
    int min_font_size = 0;
    if (gfx::PlatformFontWin::get_minimum_font_size_callback)
      min_font_size = gfx::PlatformFontWin::get_minimum_font_size_callback();
    return min_font_size;
  }
  
  // Returns either minimum font allowed for a current locale or
  // lf_height + size_delta value.
  int AdjustFontSize(int lf_height, int size_delta) {
    if (lf_height < 0) {
      lf_height -= size_delta;
    } else {
      lf_height += size_delta;
    }
    const int min_font_size = GetMinimumFontSize();
    // Make sure lf_height is not smaller than allowed min font size for current
    // locale.
    if (abs(lf_height) < min_font_size) {
      return lf_height < 0 ? -min_font_size : min_font_size;
    } else {
      return lf_height;
    }
  }
  
  // Sets style properties on |font_info| based on |font_style|.
  void SetLogFontStyle(int font_style, LOGFONT* font_info) {
    font_info->lfUnderline = (font_style & gfx::Font::UNDERLINE) != 0;
    font_info->lfItalic = (font_style & gfx::Font::ITALIC) != 0;
    font_info->lfWeight = (font_style & gfx::Font::BOLD) ? FW_BOLD : FW_NORMAL;
  }
  
  // Returns a matching IDWriteFont for the |font_info| passed in. If we fail
  // to find a matching font, then we return the IDWriteFont corresponding to
  // the default font on the system.
  // Returns S_OK on success.
  HRESULT GetMatchingDirectWriteFont(const LOGFONT& font_info,
                                     int font_style,
                                     IDWriteFactory* factory,
                                     IDWriteFont** dwrite_font) {
    // First try the GDI compat route to convert the LOGFONT to a IDWriteFont
    // If that succeeds then we are good. If that fails then try and find a
    // match from the DirectWrite font collection.
    base::win::ScopedComPtr<IDWriteGdiInterop> gdi_interop;
    HRESULT hr = factory->GetGdiInterop(gdi_interop.Receive());
    if (FAILED(hr)) {
      CHECK(false);
      return hr;
    }
  
    hr = gdi_interop->CreateFontFromLOGFONT(&font_info, dwrite_font);
    if (SUCCEEDED(hr))
      return hr;
  
    // Get the matching font from the system font collection exposed by
    // DirectWrite.
    base::win::ScopedComPtr<IDWriteFontCollection> font_collection;
    hr = factory->GetSystemFontCollection(font_collection.Receive());
    if (FAILED(hr)) {
      CHECK(false);
      return hr;
    }
  
    // Steps as below:-
    // This mirrors skia.
    // 1. Attempt to find a DirectWrite font family based on the face name in the
    //    font. That may not work at all times, as the face name could be random
    //    GDI has its own font system where in it creates a font matching the
    //    characteristics in the LOGFONT structure passed into
    //    CreateFontIndirect. DirectWrite does not do that. If this succeeds then
    //    return the matching IDWriteFont from the family.
    // 2. If step 1 fails then repeat with the default system font. This has the
    //    same limitations with the face name as mentioned above.
    // 3. If step 2 fails then return the first family from the collection and
    //    use that.
    base::win::ScopedComPtr<IDWriteFontFamily> font_family;
    BOOL exists = FALSE;
    uint32 index = 0;
    hr = font_collection->FindFamilyName(font_info.lfFaceName, &index, &exists);
    // If we fail to find a match then try fallback to the default font on the
    // system. This is what skia does as well.
    if (FAILED(hr) || (index == UINT_MAX) || !exists) {
      NONCLIENTMETRICS metrics = {0};
      metrics.cbSize = sizeof(metrics);
      if (!SystemParametersInfoW(SPI_GETNONCLIENTMETRICS,
                                 sizeof(metrics),
                                 &metrics,
                                 0)) {
        CHECK(false);
        return E_FAIL;
      }
      hr = font_collection->FindFamilyName(metrics.lfMessageFont.lfFaceName,
                                           &index,
                                           &exists);
    }
  
    if (index != UINT_MAX && exists) {
      hr = font_collection->GetFontFamily(index, font_family.Receive());
    } else {
      // If we fail to find a matching font, then fallback to the first font in
      // the list. This is what skia does as well.
      hr = font_collection->GetFontFamily(0, font_family.Receive());
    }
  
    if (FAILED(hr)) {
      CHECK(false);
      return hr;
    }
  
    DWRITE_FONT_WEIGHT weight = (font_style & SkTypeface::kBold)
                              ? DWRITE_FONT_WEIGHT_BOLD
                              : DWRITE_FONT_WEIGHT_NORMAL;
    DWRITE_FONT_STRETCH stretch = DWRITE_FONT_STRETCH_NORMAL;
    DWRITE_FONT_STYLE italic = (font_style & SkTypeface::kItalic)
                              ? DWRITE_FONT_STYLE_ITALIC
                              : DWRITE_FONT_STYLE_NORMAL;
  
    // The IDWriteFontFamily::GetFirstMatchingFont call fails on certain machines
    // for fonts like MS UI Gothic, Segoe UI, etc. It is not clear why these
    // fonts could be accessible to GDI and not to DirectWrite.
    // The code below adds some debug fields to help track down these failures.
    // 1. We get the matching font list for the font attributes passed in.
    // 2. We get the font count in the family with a debug alias variable.
    // 3. If GetFirstMatchingFont fails then we CHECK as before.
    // Next step would be to remove the CHECKs in this function and fallback to
    // GDI.
    // http://crbug.com/434425
    // TODO(ananta)
    // Remove the GetMatchingFonts and related code here once we get to a stable
    // state in canary.
    base::win::ScopedComPtr<IDWriteFontList> matching_font_list;
    hr = font_family->GetMatchingFonts(weight, stretch, italic,
                                       matching_font_list.Receive());
    uint32 matching_font_count = 0;
    if (SUCCEEDED(hr))
      matching_font_count = matching_font_list->GetFontCount();
  
    hr = font_family->GetFirstMatchingFont(weight, stretch, italic,
                                           dwrite_font);
    if (FAILED(hr)) {
      base::debug::Alias(&matching_font_count);
      CHECK(false);
    }
    return hr;
  }
  
  }  // namespace
  
  namespace gfx {
  
  // static
  PlatformFontWin::HFontRef* PlatformFontWin::base_font_ref_;
  
  // static
  PlatformFontWin::AdjustFontCallback
      PlatformFontWin::adjust_font_callback = nullptr;
  PlatformFontWin::GetMinimumFontSizeCallback
      PlatformFontWin::get_minimum_font_size_callback = NULL;
  
  IDWriteFactory* PlatformFontWin::direct_write_factory_ = nullptr;
  
  ////////////////////////////////////////////////////////////////////////////////
  // PlatformFontWin, public
  
  PlatformFontWin::PlatformFontWin() : font_ref_(GetBaseFontRef()) {
  }
  
  PlatformFontWin::PlatformFontWin(NativeFont native_font) {
    InitWithCopyOfHFONT(native_font);
  }
  
  PlatformFontWin::PlatformFontWin(const std::string& font_name,
                                   int font_size) {
    InitWithFontNameAndSize(font_name, font_size);
  }
  
  Font PlatformFontWin::DeriveFontWithHeight(int height, int style) {
    DCHECK_GE(height, 0);
    if (GetHeight() == height && GetStyle() == style)
      return Font(this);
  
    // CreateFontIndirect() doesn't return the largest size for the given height
    // when decreasing the height. Iterate to find it.
    if (GetHeight() > height) {
      const int min_font_size = GetMinimumFontSize();
      Font font = DeriveFont(-1, style);
      int font_height = font.GetHeight();
      int font_size = font.GetFontSize();
      while (font_height > height && font_size != min_font_size) {
        font = font.Derive(-1, style);
        if (font_height == font.GetHeight() && font_size == font.GetFontSize())
          break;
        font_height = font.GetHeight();
        font_size = font.GetFontSize();
      }
      return font;
    }
  
    LOGFONT font_info;
    GetObject(GetNativeFont(), sizeof(LOGFONT), &font_info);
    font_info.lfHeight = height;
    SetLogFontStyle(style, &font_info);
  
    HFONT hfont = CreateFontIndirect(&font_info);
    return DeriveWithCorrectedSize(hfont);
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  // PlatformFontWin, PlatformFont implementation:
  
  Font PlatformFontWin::DeriveFont(int size_delta, int style) const {
    LOGFONT font_info;
    GetObject(GetNativeFont(), sizeof(LOGFONT), &font_info);
    const int requested_font_size = font_ref_->requested_font_size();
    font_info.lfHeight = AdjustFontSize(-requested_font_size, size_delta);
    SetLogFontStyle(style, &font_info);
  
    HFONT hfont = CreateFontIndirect(&font_info);
    return Font(new PlatformFontWin(CreateHFontRef(hfont)));
  }
  
  int PlatformFontWin::GetHeight() const {
    return font_ref_->height();
  }
  
  int PlatformFontWin::GetBaseline() const {
    return font_ref_->baseline();
  }
  
  int PlatformFontWin::GetCapHeight() const {
    return font_ref_->cap_height();
  }
  
  int PlatformFontWin::GetExpectedTextWidth(int length) const {
    return length * std::min(font_ref_->GetDluBaseX(),
                             font_ref_->ave_char_width());
  }
  
  int PlatformFontWin::GetStyle() const {
    return font_ref_->style();
  }
  
  std::string PlatformFontWin::GetFontName() const {
    return font_ref_->font_name();
  }
  
  std::string PlatformFontWin::GetActualFontNameForTesting() const {
    // With the current implementation on Windows, HFontRef::font_name() returns
    // the font name taken from the HFONT handle, but it's not the name that comes
    // from the font's metadata.  See http://crbug.com/327287
    return font_ref_->font_name();
  }
  
  std::string PlatformFontWin::GetLocalizedFontName() const {
    base::win::ScopedCreateDC memory_dc(CreateCompatibleDC(NULL));
    if (!memory_dc.Get())
      return GetFontName();
  
    // When a font has a localized name for a language matching the system
    // locale, GetTextFace() returns the localized name.
    base::win::ScopedSelectObject font(memory_dc.Get(), font_ref_->hfont());
    wchar_t localized_font_name[LF_FACESIZE];
    int length = GetTextFace(memory_dc.Get(), arraysize(localized_font_name),
                             &localized_font_name[0]);
    if (length <= 0)
      return GetFontName();
    return base::SysWideToUTF8(localized_font_name);
  }
  
  int PlatformFontWin::GetFontSize() const {
    return font_ref_->font_size();
  }
  
  const FontRenderParams& PlatformFontWin::GetFontRenderParams() {
    CR_DEFINE_STATIC_LOCAL(const gfx::FontRenderParams, params,
        (gfx::GetFontRenderParams(gfx::FontRenderParamsQuery(false), NULL)));
    return params;
  }
  
  NativeFont PlatformFontWin::GetNativeFont() const {
    return font_ref_->hfont();
  }
  
  // static
  void PlatformFontWin::SetDirectWriteFactory(IDWriteFactory* factory) {
    // We grab a reference on the DirectWrite factory. This reference is
    // leaked, which is ok because skia leaks it as well.
    factory->AddRef();
    direct_write_factory_ = factory;
  }
  
  // static
  void PlatformFontWin::GetTextMetricsForFont(HDC hdc,
                                              HFONT font,
                                              TEXTMETRIC* text_metrics) {
    base::win::ScopedSelectObject scoped_font(hdc, font);
    GetTextMetrics(hdc, text_metrics);
  }
  
  // static
  int PlatformFontWin::GetFontSize(const LOGFONT& font_info) {
    if (font_info.lfHeight < 0)
      return -font_info.lfHeight;
  
    base::win::ScopedGetDC screen_dc(NULL);
    base::win::ScopedGDIObject<HFONT> font(CreateFontIndirect(&font_info));
  
    TEXTMETRIC font_metrics = {0};
    PlatformFontWin::GetTextMetricsForFont(screen_dc, font, &font_metrics);
    return font_metrics.tmAscent;
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  // Font, private:
  
  void PlatformFontWin::InitWithCopyOfHFONT(HFONT hfont) {
    DCHECK(hfont);
    LOGFONT font_info;
    GetObject(hfont, sizeof(LOGFONT), &font_info);
    font_ref_ = CreateHFontRef(CreateFontIndirect(&font_info));
  }
  
  void PlatformFontWin::InitWithFontNameAndSize(const std::string& font_name,
                                                int font_size) {
    HFONT hf = ::CreateFont(-font_size, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE,
                            DEFAULT_CHARSET,
                            OUT_DEFAULT_PRECIS,
                            CLIP_DEFAULT_PRECIS,
                            DEFAULT_QUALITY,
                            DEFAULT_PITCH | FF_DONTCARE,
                            base::UTF8ToUTF16(font_name).c_str());
    font_ref_ = CreateHFontRef(hf);
  }
  
  // static
  PlatformFontWin::HFontRef* PlatformFontWin::GetBaseFontRef() {
    if (base_font_ref_ == NULL) {
      NONCLIENTMETRICS_XP metrics;
      base::win::GetNonClientMetrics(&metrics);
  
      if (adjust_font_callback)
        adjust_font_callback(&metrics.lfMessageFont);
      Size dpi = gfx::GetDPI();
      int targetSize = MulDiv(metrics.lfMessageFont.lfHeight, 96, dpi.height());
      metrics.lfMessageFont.lfHeight = 
          AdjustFontSize(metrics.lfMessageFont.lfHeight, metrics.lfMessageFont.lfHeight - targetSize);
      HFONT font = CreateFontIndirect(&metrics.lfMessageFont);
      DLOG_ASSERT(font);
      base_font_ref_ = PlatformFontWin::CreateHFontRef(font);
      // base_font_ref_ is global, up the ref count so it's never deleted.
      base_font_ref_->AddRef();
    }
    return base_font_ref_;
  }
  
  PlatformFontWin::HFontRef* PlatformFontWin::CreateHFontRef(HFONT font) {
    TEXTMETRIC font_metrics;
  
    {
      base::win::ScopedGetDC screen_dc(NULL);
      gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT);
      GetTextMetricsForFont(screen_dc, font, &font_metrics);
    }
  
    if (direct_write_factory_)
      return CreateHFontRefFromSkia(font, font_metrics);
  
    return CreateHFontRefFromGDI(font, font_metrics);
  }
  
  PlatformFontWin::HFontRef* PlatformFontWin::CreateHFontRefFromGDI(
      HFONT font,
      const TEXTMETRIC& font_metrics) {
    const int height = std::max<int>(1, font_metrics.tmHeight);
    const int baseline = std::max<int>(1, font_metrics.tmAscent);
    const int cap_height =
        std::max<int>(1, font_metrics.tmAscent - font_metrics.tmInternalLeading);
    const int ave_char_width = std::max<int>(1, font_metrics.tmAveCharWidth);
    const int font_size =
        std::max<int>(1, font_metrics.tmHeight - font_metrics.tmInternalLeading);
    int style = 0;
    if (font_metrics.tmItalic)
      style |= Font::ITALIC;
    if (font_metrics.tmUnderlined)
      style |= Font::UNDERLINE;
    if (font_metrics.tmWeight >= kTextMetricWeightBold)
      style |= Font::BOLD;
  
    return new HFontRef(font, font_size, height, baseline, cap_height,
                        ave_char_width, style);
  }
  
  Font PlatformFontWin::DeriveWithCorrectedSize(HFONT base_font) {
    base::win::ScopedGetDC screen_dc(NULL);
    gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT);
  
    base::win::ScopedGDIObject<HFONT> best_font(base_font);
    TEXTMETRIC best_font_metrics;
    GetTextMetricsForFont(screen_dc, best_font, &best_font_metrics);
  
    LOGFONT font_info;
    GetObject(base_font, sizeof(LOGFONT), &font_info);
  
    // Set |lfHeight| to negative value to indicate it's the size, not the height.
    font_info.lfHeight =
        -(best_font_metrics.tmHeight - best_font_metrics.tmInternalLeading);
  
    do {
      // Increment font size. Prefer font with greater size if its height isn't
      // greater than height of base font.
      font_info.lfHeight = AdjustFontSize(font_info.lfHeight, 1);
      base::win::ScopedGDIObject<HFONT> font(CreateFontIndirect(&font_info));
      TEXTMETRIC font_metrics;
      GetTextMetricsForFont(screen_dc, font, &font_metrics);
      if (font_metrics.tmHeight > best_font_metrics.tmHeight)
        break;
      best_font.Set(font.release());
      best_font_metrics = font_metrics;
    } while (true);
  
    return Font(new PlatformFontWin(CreateHFontRef(best_font.release())));
  }
  
  // static
  PlatformFontWin::HFontRef* PlatformFontWin::CreateHFontRefFromSkia(
      HFONT gdi_font,
      const TEXTMETRIC& font_metrics) {
    LOGFONT font_info = {0};
    GetObject(gdi_font, sizeof(LOGFONT), &font_info);
  
    // If the font height is passed in as 0, assume the height to be -1 to ensure
    // that we return the metrics for a 1 point font.
    // If the font height is positive it represents the rasterized font's cell
    // height. Calculate the actual height accordingly.
    if (font_info.lfHeight > 0) {
      font_info.lfHeight =
          font_metrics.tmInternalLeading - font_metrics.tmHeight;
    } else if (font_info.lfHeight == 0) {
      font_info.lfHeight = -1;
    }
  
    int skia_style = SkTypeface::kNormal;
    if (font_info.lfWeight >= FW_SEMIBOLD &&
        font_info.lfWeight <= FW_ULTRABOLD) {
      skia_style |= SkTypeface::kBold;
    }
    if (font_info.lfItalic)
      skia_style |= SkTypeface::kItalic;
  
    // Skia does not return all values we need for font metrics. For e.g.
    // the cap height which indicates the height of capital letters is not
    // returned even though it is returned by DirectWrite.
    // TODO(ananta)
    // Fix SkScalerContext_win_dw.cpp to return all metrics we need from
    // DirectWrite and remove the code here which retrieves metrics from
    // DirectWrite to calculate the cap height.
    base::win::ScopedComPtr<IDWriteFont> dwrite_font;
    HRESULT hr = GetMatchingDirectWriteFont(font_info,
                                            skia_style,
                                            direct_write_factory_,
                                            dwrite_font.Receive());
    if (FAILED(hr)) {
      CHECK(false);
      return nullptr;
    }
  
    DWRITE_FONT_METRICS dwrite_font_metrics = {0};
    dwrite_font->GetMetrics(&dwrite_font_metrics);
  
    skia::RefPtr<SkTypeface> skia_face = skia::AdoptRef(
        SkTypeface::CreateFromName(
            base::SysWideToUTF8(font_info.lfFaceName).c_str(),
                                static_cast<SkTypeface::Style>(skia_style)));
  
    BOOL antialiasing = TRUE;
    SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, &antialiasing, 0);
  
    SkPaint paint;
    paint.setAntiAlias(!!antialiasing);
    paint.setTypeface(skia_face.get());
    paint.setTextSize(-font_info.lfHeight);
    SkPaint::FontMetrics skia_metrics;
    paint.getFontMetrics(&skia_metrics);
  
    // The calculations below are similar to those in the CreateHFontRef
    // function. The height, baseline and cap height are rounded up to ensure
    // that they match up closely with GDI.
    const int height = std::ceil(
        skia_metrics.fDescent - skia_metrics.fAscent + skia_metrics.fLeading);
    const int baseline = std::max<int>(1, std::ceil(-skia_metrics.fAscent));
    const int cap_height = std::ceil(paint.getTextSize() *
        static_cast<double>(dwrite_font_metrics.capHeight) /
            dwrite_font_metrics.designUnitsPerEm);
  
    // The metrics retrieved from skia don't have the average character width. In
    // any case if we get the average character width from skia then use that or
    // the average character width in the TEXTMETRIC structure.
    // TODO(ananta): Investigate whether it is possible to retrieve this value
    // from DirectWrite.
    const int ave_char_width =
        skia_metrics.fAvgCharWidth == 0 ? font_metrics.tmAveCharWidth
                : skia_metrics.fAvgCharWidth;
  
    int style = 0;
    if (skia_style & SkTypeface::kItalic)
      style |= Font::ITALIC;
    if (font_info.lfUnderline)
      style |= Font::UNDERLINE;
    if (font_info.lfWeight >= kTextMetricWeightBold)
      style |= Font::BOLD;
    return new HFontRef(gdi_font, -font_info.lfHeight, height, baseline,
                        cap_height, ave_char_width, style);
  }
  
  PlatformFontWin::PlatformFontWin(HFontRef* hfont_ref) : font_ref_(hfont_ref) {
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  // PlatformFontWin::HFontRef:
  
  PlatformFontWin::HFontRef::HFontRef(HFONT hfont,
                                      int font_size,
                                      int height,
                                      int baseline,
                                      int cap_height,
                                      int ave_char_width,
                                      int style)
      : hfont_(hfont),
        font_size_(font_size),
        height_(height),
        baseline_(baseline),
        cap_height_(cap_height),
        ave_char_width_(ave_char_width),
        style_(style),
        dlu_base_x_(-1),
        requested_font_size_(font_size) {
    DLOG_ASSERT(hfont);
  
    LOGFONT font_info;
    GetObject(hfont_, sizeof(LOGFONT), &font_info);
    font_name_ = base::UTF16ToUTF8(base::string16(font_info.lfFaceName));
    if (font_info.lfHeight < 0)
      requested_font_size_ = -font_info.lfHeight;
  }
  
  int PlatformFontWin::HFontRef::GetDluBaseX() {
    if (dlu_base_x_ != -1)
      return dlu_base_x_;
  
    dlu_base_x_ = GetAverageCharWidthInDialogUnits(hfont_);
    return dlu_base_x_;
  }
  
  // static
  int PlatformFontWin::HFontRef::GetAverageCharWidthInDialogUnits(
      HFONT gdi_font) {
    base::win::ScopedGetDC screen_dc(NULL);
    base::win::ScopedSelectObject font(screen_dc, gdi_font);
    gfx::ScopedSetMapMode mode(screen_dc, MM_TEXT);
  
    // Yes, this is how Microsoft recommends calculating the dialog unit
    // conversions. See: http://support.microsoft.com/kb/125681
    SIZE ave_text_size;
    GetTextExtentPoint32(screen_dc,
                         L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
                         52, &ave_text_size);
    int dlu_base_x = (ave_text_size.cx / 26 + 1) / 2;
  
    DCHECK_NE(dlu_base_x, -1);
    return dlu_base_x;
  }
  
  PlatformFontWin::HFontRef::~HFontRef() {
    DeleteObject(hfont_);
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  // PlatformFont, public:
  
  // static
  PlatformFont* PlatformFont::CreateDefault() {
    return new PlatformFontWin;
  }
  
  // static
  PlatformFont* PlatformFont::CreateFromNativeFont(NativeFont native_font) {
    return new PlatformFontWin(native_font);
  }
  
  // static
  PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
                                                    int font_size) {
    return new PlatformFontWin(font_name, font_size);
  }
  
  }  // namespace gfx
  