From 49192fddd6271a5d7bbbf20b1b2a3bef42f4e8bc Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Thu, 15 Jun 2006 08:05:51 +0000
Subject: [PATCH] Support UTF8 in OSD text

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18720 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libvo/sub.c | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/libvo/sub.c b/libvo/sub.c
index 05b0901516..580bb5831b 100644
--- a/libvo/sub.c
+++ b/libvo/sub.c
@@ -140,6 +140,35 @@ inline static void vo_draw_text_from_buffer(mp_osd_obj_t* obj,void (*draw_alpha)
     }
 }
 
+static unsigned utf8_get_char(char **str) {
+  uint8_t *strp = (uint8_t *)*str;
+  unsigned c = *strp++;
+  unsigned mask = 0x80;
+  int len = -1;
+  while (c & mask) {
+    mask >>= 1;
+    len++;
+  }
+  if (len <= 0 || len > 4)
+    goto no_utf8;
+  c &= mask - 1;
+  while ((*strp & 0xc0) == 0x80) {
+    if (len-- <= 0)
+      goto no_utf8;
+    c = (c << 6) | (*strp++ & 0x3f);
+  }
+  if (len)
+    goto no_utf8;
+  *str = (char *)strp;
+  return c;
+
+no_utf8:
+  strp = (uint8_t *)*str;
+  c = *strp++;
+  *str = (char *)strp;
+  return c;
+}
+
 inline static void vo_update_text_osd(mp_osd_obj_t* obj,int dxs,int dys){
 	unsigned char *cp=vo_osd_text;
 	int x=20;
@@ -150,7 +179,7 @@ inline static void vo_update_text_osd(mp_osd_obj_t* obj,int dxs,int dys){
         obj->bbox.y1=obj->y=10;
 
         while (*cp){
-          int c=*cp++;
+          uint16_t c=utf8_get_char(&cp);
 	  render_one_glyph(vo_font, c);
 	  x+=vo_font->width[c]+vo_font->charspace;
 	  h=get_height(c,h);
@@ -165,7 +194,7 @@ inline static void vo_update_text_osd(mp_osd_obj_t* obj,int dxs,int dys){
 	cp=vo_osd_text;
 	x = obj->x;
         while (*cp){
-          int c=*cp++;
+          uint16_t c=utf8_get_char(&cp);
           if ((font=vo_font->font[c])>=0)
             draw_alpha_buf(obj,x,obj->y,
 			   vo_font->width[c],