dwrite: Implement GetPaletteEntryCount().

dlls/dwrite/dwrite_private.h

@@ -154,6 +154,7 @@ extern HRESULT opentype_get_font_strings_from_id(const void*,DWRITE_INFORMATIONA
 extern HRESULT opentype_get_typographic_features(IDWriteFontFace*,UINT32,UINT32,UINT32,UINT32*,DWRITE_FONT_FEATURE_TAG*) DECLSPEC_HIDDEN;
 extern BOOL opentype_get_vdmx_size(const void*,INT,UINT16*,UINT16*) DECLSPEC_HIDDEN;
 extern UINT32 opentype_get_cpal_palettecount(const void*) DECLSPEC_HIDDEN;
+extern UINT32 opentype_get_cpal_paletteentrycount(const void*) DECLSPEC_HIDDEN;
 
 enum gasp_flags {
     GASP_GRIDFIT             = 0x0001,

dlls/dwrite/font.c

@@ -964,8 +964,8 @@ static UINT32 WINAPI dwritefontface2_GetColorPaletteCount(IDWriteFontFace2 *ifac
 static UINT32 WINAPI dwritefontface2_GetPaletteEntryCount(IDWriteFontFace2 *iface)
 {
     struct dwrite_fontface *This = impl_from_IDWriteFontFace2(iface);
-    FIXME("(%p): stub\n", This);
-    return 0;
+    TRACE("(%p)\n", This);
+    return opentype_get_cpal_paletteentrycount(get_fontface_cpal(This));
 }
 
 static HRESULT WINAPI dwritefontface2_GetPaletteEntries(IDWriteFontFace2 *iface, UINT32 palette_index,

dlls/dwrite/opentype.c

@@ -1428,3 +1428,9 @@ UINT32 opentype_get_cpal_palettecount(const void *cpal)
     const struct CPAL_Header_0 *header = (const struct CPAL_Header_0*)cpal;
     return header ? GET_BE_WORD(header->numPalette) : 0;
 }
+
+UINT32 opentype_get_cpal_paletteentrycount(const void *cpal)
+{
+    const struct CPAL_Header_0 *header = (const struct CPAL_Header_0*)cpal;
+    return header ? GET_BE_WORD(header->numPaletteEntries) : 0;
+}