/* IDWriteGdiInterop methods */
virtual HRESULT STDMETHODCALLTYPE CreateFontFromLOGFONT(
LOGFONTW const *logFont,
IDWriteFont **font)
{
OutputDebugString("delegate_dwrite_gdi_interop::CreateFontFromLOGFONT");
HRESULT result;
UINT32 index;
BOOL exists;
result = mycoll_->FindFamilyName(logFont->lfFaceName, &index, &exists);
if (SUCCEEDED(result)) {
result = E_FAIL;
if (exists != FALSE) {
IDWriteFontFamily *family;
result = mycoll_->GetFontFamily(index, &family);
if (SUCCEEDED(result)) {
result = family->GetFirstMatchingFont(
(DWRITE_FONT_WEIGHT)logFont->lfWeight,
DWRITE_FONT_STRETCH_NORMAL,
DWRITE_FONT_STYLE_NORMAL,
font);
iunknown_release(family);
}
}
}
if (FAILED(result)) {
OutputDebugString("delegate_dwrite_gdi_interop::CreateFontFromLOGFONT -> fallback");
result = orig_this->CreateFontFromLOGFONT(logFont, font);
}
return result;
}
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 setupLayout (const AttributedString& text, const float maxWidth, const float maxHeight,
ID2D1RenderTarget& renderTarget, IDWriteFactory& directWriteFactory,
IDWriteFontCollection& fontCollection, ComSmartPtr<IDWriteTextLayout>& textLayout)
{
// To add color to text, we need to create a D2D render target
// Since we are not actually rendering to a D2D context we create a temporary GDI render target
Font defaultFont;
BOOL fontFound = false;
uint32 fontIndex;
fontCollection.FindFamilyName (defaultFont.getTypeface()->getName().toWideCharPointer(), &fontIndex, &fontFound);
if (! fontFound)
fontIndex = 0;
ComSmartPtr<IDWriteFontFamily> dwFontFamily;
HRESULT hr = fontCollection.GetFontFamily (fontIndex, dwFontFamily.resetAndGetPointerAddress());
ComSmartPtr<IDWriteFont> dwFont;
hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL,
dwFont.resetAndGetPointerAddress());
jassert (dwFont != nullptr);
const float defaultFontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (*dwFont);
ComSmartPtr<IDWriteTextFormat> dwTextFormat;
hr = directWriteFactory.CreateTextFormat (defaultFont.getTypefaceName().toWideCharPointer(), &fontCollection,
DWRITE_FONT_WEIGHT_REGULAR, DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL,
defaultFont.getHeight() * defaultFontHeightToEmSizeFactor,
L"en-us", dwTextFormat.resetAndGetPointerAddress());
setTextFormatProperties (text, *dwTextFormat);
{
DWRITE_TRIMMING trimming = { DWRITE_TRIMMING_GRANULARITY_CHARACTER, 0, 0 };
ComSmartPtr<IDWriteInlineObject> trimmingSign;
hr = directWriteFactory.CreateEllipsisTrimmingSign (dwTextFormat, trimmingSign.resetAndGetPointerAddress());
hr = dwTextFormat->SetTrimming (&trimming, trimmingSign);
}
const int textLen = text.getText().length();
hr = directWriteFactory.CreateTextLayout (text.getText().toWideCharPointer(), textLen, dwTextFormat,
maxWidth, maxHeight, textLayout.resetAndGetPointerAddress());
if (FAILED (hr) || textLayout == nullptr)
return false;
const int numAttributes = text.getNumAttributes();
for (int i = 0; i < numAttributes; ++i)
addAttributedRange (*text.getAttribute (i), *textLayout, textLen, renderTarget, fontCollection);
return true;
}
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);
}
}
bool IsFamilyInSystemFontCollection(IDWriteFactory* factory, const WCHAR* familyName)
{
bool result = false;
IDWriteFontCollection* systemFontCollection;
HRESULT hr = factory->GetSystemFontCollection(&systemFontCollection);
if (SUCCEEDED(hr))
{
UINT32 familyNameIndex;
BOOL familyNameFound;
HRESULT hr = systemFontCollection->FindFamilyName(
familyName, &familyNameIndex, &familyNameFound);
if (SUCCEEDED(hr) && familyNameFound)
{
result = true;
}
systemFontCollection->Release();
}
return result;
}
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;
}