I use an alternative way to do this before:
- Create a path geometry
- Open the path geometry to get the geometry sink
- Call GetGlyphRunOutline to convert to text to geometry
- Call GetBounds of the converted geometry to get the boundary rectangle
After converting the text to geometry, you can translate/rotate/scaling it, and do everything what a geometry can do. you can also just drop the geometry after getting the boundary rectangle and drawing with your own method.
Some codes for your references
// Create path geometry
hr = pD2DFactory->CreatePathGeometry(&pPathGeometry);
if(FAILED(hr))
{
MessageBox(NULL, L"Create path geometry failed!", L"Error", 0);
return;
}
// Open sink
hr = pPathGeometry->Open(&pGeometrySink);
if(FAILED(hr))
{
MessageBox(NULL, L"Open geometry sink failed!", L"Error", 0);
return;
}
// Get glyph run outline
hr = pFontFace->GetGlyphRunOutline(
fontSize_, // font size
pGlyphIndices,
NULL,
NULL,
textLength,
FALSE,
FALSE,
pGeometrySink
);
if(FAILED(hr))
{
MessageBox(NULL, L"Get glyph run outline failed!", L"Error", 0);
return;
}
// Close sink
pGeometrySink->Close();