diff --git a/src/hb-directwrite.cc b/src/hb-directwrite.cc index ce04f5bab..e0ad4d257 100644 --- a/src/hb-directwrite.cc +++ b/src/hb-directwrite.cc @@ -43,6 +43,14 @@ * Functions for using HarfBuzz with DirectWrite fonts. **/ +/* Declare object creator for dynamic support of DWRITE */ +typedef HRESULT (* WINAPI t_DWriteCreateFactory)( + DWRITE_FACTORY_TYPE factoryType, + REFIID iid, + IUnknown **factory +); + + /* * DirectWrite font stream helpers */ @@ -137,6 +145,7 @@ public: struct hb_directwrite_face_data_t { + HMODULE dwrite_dll; IDWriteFactory *dwriteFactory; IDWriteFontFile *fontFile; DWriteFontFileStream *fontFileStream; @@ -158,12 +167,33 @@ _hb_directwrite_shaper_face_data_create (hb_face_t *face) return nullptr; \ } HB_STMT_END + data->dwrite_dll = LoadLibrary (TEXT ("DWRITE")); + if (unlikely (!data->dwrite_dll)) + FAIL ("Cannot find DWrite.DLL"); + + t_DWriteCreateFactory p_DWriteCreateFactory; + +#if defined(__GNUC__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wcast-function-type" +#endif + + p_DWriteCreateFactory = (t_DWriteCreateFactory) + GetProcAddress (data->dwrite_dll, "DWriteCreateFactory"); + +#if defined(__GNUC__) +#pragma GCC diagnostic pop +#endif + + if (unlikely (!p_DWriteCreateFactory)) + FAIL ("Cannot find DWriteCreateFactory()."); + HRESULT hr; // TODO: factory and fontFileLoader should be cached separately IDWriteFactory* dwriteFactory; - hr = DWriteCreateFactory (DWRITE_FACTORY_TYPE_SHARED, __uuidof (IDWriteFactory), - (IUnknown**) &dwriteFactory); + hr = p_DWriteCreateFactory (DWRITE_FACTORY_TYPE_SHARED, __uuidof (IDWriteFactory), + (IUnknown**) &dwriteFactory); if (unlikely (hr != S_OK)) FAIL ("Failed to run DWriteCreateFactory()."); @@ -227,6 +257,8 @@ _hb_directwrite_shaper_face_data_destroy (hb_directwrite_face_data_t *data) delete data->fontFileStream; if (data->faceBlob) hb_blob_destroy (data->faceBlob); + if (data->dwrite_dll) + FreeLibrary (data->dwrite_dll); if (data) delete data; }