fontselect: find fonts with PostScript outlines by PostScript name

Fonts without PostScript outlines (such as TrueType fonts) are unaffected,
and their PostScript names continue to be ignored when searching for fonts.

This matches the behavior of GDI and hence VSFilter.

1 files changed, 20 insertions, 0 deletions

diff --git a/libass/ass_directwrite.c b/libass/ass_directwrite.c
index 6b6b623..8388f1c 100644
--- a/libass/ass_directwrite.c
+++ b/libass/ass_directwrite.c
@@ -483,6 +483,24 @@ static int map_width(enum DWRITE_FONT_STRETCH stretch)
     }
 }
 
+static bool is_postscript(IDWriteFont *font)
+{
+    HRESULT hr = S_OK;
+    IDWriteFontFace *face = NULL;
+    DWRITE_FONT_FACE_TYPE type;
+
+    hr = IDWriteFont_CreateFontFace(font, &face);
+    if (FAILED(hr) || !face)
+        return false;
+
+    type = IDWriteFontFace_GetType(face);
+    IDWriteFontFace_Release(face);
+
+    return type == DWRITE_FONT_FACE_TYPE_CFF ||
+           type == DWRITE_FONT_FACE_TYPE_RAW_CFF ||
+           type == DWRITE_FONT_FACE_TYPE_TYPE1;
+}
+
 /*
  * Scan every system font on the current machine and add it
  * to the libass lookup. Stores the FontPrivate as private data
@@ -616,6 +634,8 @@ static void scan_fonts(IDWriteFactory *factory,
             }
             IDWriteLocalizedStrings_Release(familyNames);
 
+            meta.is_postscript = is_postscript(font);
+
             FontPrivate *font_priv = (FontPrivate *) calloc(1, sizeof(*font_priv));
             font_priv->font = font;