void addAttributedRange (const AttributedString::Attribute& attr, IDWriteTextLayout& textLayout,
const int textLen, ID2D1RenderTarget& renderTarget, IDWriteFontCollection& fontCollection)
{
DWRITE_TEXT_RANGE range;
range.startPosition = attr.range.getStart();
range.length = jmin (attr.range.getLength(), textLen - attr.range.getStart());
if (const Font* const font = attr.getFont())
{
const String familyName (FontStyleHelpers::getConcreteFamilyName (*font));
BOOL fontFound = false;
uint32 fontIndex;
fontCollection.FindFamilyName (familyName.toWideCharPointer(), &fontIndex, &fontFound);
if (! fontFound)
fontIndex = 0;
ComSmartPtr<IDWriteFontFamily> fontFamily;
HRESULT hr = fontCollection.GetFontFamily (fontIndex, fontFamily.resetAndGetPointerAddress());
ComSmartPtr<IDWriteFont> dwFont;
uint32 fontFacesCount = 0;
fontFacesCount = fontFamily->GetFontCount();
for (int i = fontFacesCount; --i >= 0;)
{
hr = fontFamily->GetFont (i, dwFont.resetAndGetPointerAddress());
if (font->getTypefaceStyle() == getFontFaceName (dwFont))
break;
}
textLayout.SetFontFamilyName (familyName.toWideCharPointer(), range);
textLayout.SetFontWeight (dwFont->GetWeight(), range);
textLayout.SetFontStretch (dwFont->GetStretch(), range);
textLayout.SetFontStyle (dwFont->GetStyle(), range);
const float fontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (*dwFont);
textLayout.SetFontSize (font->getHeight() * fontHeightToEmSizeFactor, range);
}
if (const Colour* const colour = attr.getColour())
{
ComSmartPtr<ID2D1SolidColorBrush> d2dBrush;
renderTarget.CreateSolidColorBrush (D2D1::ColorF (colour->getFloatRed(),
colour->getFloatGreen(),
colour->getFloatBlue(),
colour->getFloatAlpha()),
d2dBrush.resetAndGetPointerAddress());
// We need to call SetDrawingEffect with a legimate brush to get DirectWrite to break text based on colours
textLayout.SetDrawingEffect (d2dBrush, range);
}
}
