CODEWITHSUNDEEP
c++windowswinapidirectwrite
user13113975
user13113975

Reputation:

Trying to use custom fonts with DirectWrite

I am trying to load a font file from memory. The resource script defines the font like this:

ID_FONT CUSTOM_RC "res/Montserrat-Regular.ttf"

And then I try to load the font resource like this:

IDWriteFactory5* dwFactory = nullptr;
DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory5),
    reinterpret_cast<IUnknown**>(&dwFactory));

HRSRC resourceInfo = FindResourceW(instance, MAKEINTRESOURCEW(ID_FONT),
    L"CUSTOM_RC");

HGLOBAL resourceData = LoadResource(instance, resourceInfo);

LPVOID resource = LockResource(resourceData);

DWORD size = SizeofResource(instance, resourceInfo);

DWORD fonts = 0;
HANDLE font = AddFontMemResourceEx(resource, size, 0, &fonts);

Then I create the IDWriteTextFormat like this:

IDWriteTextFormat* format;
dwFactory->CreateTextFormat(L"Montserrat", nullptr, DWRITE_FONT_WEIGHT_REGULAR,
    DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, 20.0f, L"en-us",
    &format);

I get no issues loading the resource, but when I try to use the font, it doesn't work. It just gives me a different font, which I think is Ariel.

I also tried loading the font like this:

IDWriteInMemoryFontFileLoader* loader = nullptr;
dwFactory->CreateInMemoryFontFileLoader(&loader);
dwFactory->RegisterFontFileLoader(loader);

IDWriteFontFile* fontFile = nullptr;
loader->CreateInMemoryFontFileReference(dwFactory, resource, size, nullptr,
    &fontFile);

But now I have a IDWriteFontFile and I'm not sure how I am supposed to make a IDWriteTextFormat from it, or if it even is the proper way to load the resource.

I'm not sure what I am doing wrong or where to go from here.

Upvotes: 0

Views: 483

Answers (1)

Jeaninez - MSFT
Jeaninez - MSFT

Reputation: 4040

For each font file in the local file system, create an IDWriteFontFile that refers to it via CreateFontFileReference. And then add the IDWriteFontFile object to the font set builder using the AddFontFile method.

For more details, I suggest you could refer to the Doc:Custom Font Sets

Upvotes: 0

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