bool Font::LoadFromStream(InputStream& stream)
{
// Cleanup the previous resources
Cleanup();
myRefCount = new int(1);
// Initialize FreeType
// Note: we initialize FreeType for every font instance in order to avoid having a single
// global manager that would create a lot of issues regarding creation and destruction order.
FT_Library library;
if (FT_Init_FreeType(&library) != 0)
{
Err() << "Failed to load font from stream (failed to initialize FreeType)" << std::endl;
return false;
}
myLibrary = library;
// Prepare a wrapper for our stream, that we'll pass to FreeType callbacks
FT_StreamRec* rec = new FT_StreamRec;
std::memset(rec, 0, sizeof(rec));
rec->base = NULL;
rec->size = static_cast<unsigned long>(stream.GetSize());
rec->pos = 0;
rec->descriptor.pointer = &stream;
rec->read = &Read;
rec->close = &Close;
// Setup the FreeType callbacks that will read our stream
FT_Open_Args args;
args.flags = FT_OPEN_STREAM;
args.stream = rec;
args.driver = 0;
// Load the new font face from the specified stream
FT_Face face;
if (FT_Open_Face(static_cast<FT_Library>(myLibrary), &args, 0, &face) != 0)
{
Err() << "Failed to load font from stream (failed to create the font face)" << std::endl;
return false;
}
// Select the unicode character map
if (FT_Select_Charmap(face, FT_ENCODING_UNICODE) != 0)
{
Err() << "Failed to load font from stream (failed to set the Unicode character set)" << std::endl;
return false;
}
// Store the loaded font in our ugly void* :)
myFace = face;
myStreamRec = rec;
return true;
}
