Improve fontconfig setup

Add an argument to ass_set_fonts for controlling whether the fontconfig
font cache should be built/updated.  Add a new function ass_fonts_update
to make it possible to update fonts later on.
Additionally, stop using FcConfigSetDefault for thread safety.

1 files changed, 8 insertions, 4 deletions

diff --git a/libass/ass_render.c b/libass/ass_render.c
index df4e74c9..b5e8ab70 100644
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -3186,8 +3186,9 @@ void ass_set_line_spacing(ass_renderer_t *priv, double line_spacing)
     priv->settings.line_spacing = line_spacing;
 }
 
-int ass_set_fonts(ass_renderer_t *priv, const char *default_font,
-                  const char *default_family, int fc, const char *config)
+void ass_set_fonts(ass_renderer_t *priv, const char *default_font,
+                   const char *default_family, int fc, const char *config,
+                   int update)
 {
     if (priv->settings.default_font)
         free(priv->settings.default_font);
@@ -3204,9 +3205,12 @@ int ass_set_fonts(ass_renderer_t *priv, const char *default_font,
         fontconfig_done(priv->fontconfig_priv);
     priv->fontconfig_priv =
         fontconfig_init(priv->library, priv->ftlibrary, default_family,
-                        default_font, fc, config);
+                        default_font, fc, config, update);
+}
 
-    return !!priv->fontconfig_priv;
+int ass_fonts_update(ass_renderer_t *render_priv)
+{
+    return fontconfig_update(render_priv->fontconfig_priv);
 }
 
 /**