Message callback funtionality

Introduce functionality for providing a message callback that is used
for passing messages to the controlling application instead of simply
printing them to standard output.  The function pointer to the callback
is stored in the ass_library_t instance. ass_msg needs access to it, so
in many places the library instance needs to be passed around now.

The default behavior is the old one: messages of MSGL_INFO or lower
are printed to the standard output, prefixed with "[ass]".

1 files changed, 6 insertions, 4 deletions

diff --git a/libass/ass_bitmap.h b/libass/ass_bitmap.h
index f6b13805..2e34a5c6 100644
--- a/libass/ass_bitmap.h
+++ b/libass/ass_bitmap.h
@@ -24,6 +24,8 @@
 #include <ft2build.h>
 #include FT_GLYPH_H
 
+#include "ass.h"
+
 typedef struct ass_synth_priv_s ass_synth_priv_t;
 
 ass_synth_priv_t *ass_synth_init(double);
@@ -44,10 +46,10 @@ typedef struct bitmap_s {
  * \param bm_g out: pointer to the bitmap of glyph shadow is returned here
  * \param be 1 = produces blurred bitmaps, 0 = normal bitmaps
  */
-int glyph_to_bitmap(ass_synth_priv_t *priv_blur, FT_Glyph glyph,
-                    FT_Glyph outline_glyph, bitmap_t **bm_g,
-                    bitmap_t **bm_o, bitmap_t **bm_s, int be,
-                    double blur_radius, FT_Vector shadow_offset);
+int glyph_to_bitmap(ass_library_t *library, ass_synth_priv_t *priv_blur,
+                    FT_Glyph glyph, FT_Glyph outline_glyph,
+                    bitmap_t **bm_g, bitmap_t **bm_o, bitmap_t **bm_s,
+                    int be, double blur_radius, FT_Vector shadow_offset);
 
 void ass_free_bitmap(bitmap_t *bm);