Almost complete the i18n system, including:

Copy unifont..ttf.gz from source tree to target datafile path( now ONLY works with cmake );
Set the locale the same with system's setting;
If need unicode font, unzip and load unifont when init ui styles;
Apply gettext() to labels in space_info.py, who are the main menu items.

Each of these should have been commit one by one. As they work well according to my tests, so I just lazily send a long list.

14 files changed, 160 insertions, 19 deletions

diff --git a/source/blender/blenfont/BLF_api.h b/source/blender/blenfont/BLF_api.h
index 79c8c3b9a1a..05f383cdace 100644
--- a/source/blender/blenfont/BLF_api.h
+++ b/source/blender/blenfont/BLF_api.h
@@ -188,6 +188,8 @@ void BLF_lang_init(void);
 
 /* Set the current locale. */
 void BLF_lang_set(const char *);
+/* Get the current locale. */
+char* BLF_lang_get(void);
 
 /* Set the current encoding name. */
 void BLF_lang_encoding_name(const char *str);
@@ -218,4 +220,8 @@ void BLF_dir_free(char **dirs, int count);
 extern int blf_mono_font;
 extern int blf_mono_font_render; // dont mess drawing with render threads.
 
+// XXX, me, too
+extern int blf_unifont;
+extern int blf_unifont_render; // dont mess drawing with render threads.
+
 #endif /* BLF_API_H */
diff --git a/source/blender/blenfont/intern/blf.c b/source/blender/blenfont/intern/blf.c
index 1d2ac298af4..b5ad6ab8ae9 100644
--- a/source/blender/blenfont/intern/blf.c
+++ b/source/blender/blenfont/intern/blf.c
@@ -76,6 +76,10 @@ static int global_font_dpi= 72;
 int blf_mono_font= -1;
 int blf_mono_font_render= -1;
 
+// XXX, should these be made into global_font_'s too?
+int blf_unifont= -1;
+int blf_unifont_render= -1;
+
 static FontBLF *BLF_get(int fontid)
 {
 	if (fontid >= 0 && fontid < BLF_MAX_FONT)
diff --git a/source/blender/blenfont/intern/blf_lang.c b/source/blender/blenfont/intern/blf_lang.c
index e7f9d1746ad..6a3e5b1f2ef 100644
--- a/source/blender/blenfont/intern/blf_lang.c
+++ b/source/blender/blenfont/intern/blf_lang.c
@@ -89,6 +89,7 @@ void BLF_lang_set(const char *str)
 	
 #if defined (_WIN32) || defined(__APPLE__)
 		BLI_setenv("LANG", str);
+		BLI_strncpy(global_language, BLI_getenv("LANG"), sizeof(global_language));
 #else
 		char *locreturn= setlocale(LC_ALL, str);
 		if (locreturn == NULL) {
@@ -101,14 +102,12 @@ void BLF_lang_set(const char *str)
 
 			MEM_freeN(lang);
 		}
-
+		BLI_strncpy(global_language, locreturn, sizeof(global_language));
 		setlocale(LC_NUMERIC, "C");
 #endif
 		textdomain(DOMAIN_NAME);
 		bindtextdomain(DOMAIN_NAME, global_messagepath);
 		/* bind_textdomain_codeset(DOMAIN_NAME, global_encoding_name); */
-		BLI_strncpy(global_language, str, sizeof(global_language));
-		
 	}
 }
 
@@ -118,6 +117,11 @@ void BLF_lang_encoding(const char *str)
 	/* bind_textdomain_codeset(DOMAIN_NAME, encoding_name); */
 }
 
+char* BLF_lang_get(void)
+{
+	return global_language;
+}
+
 #else /* ! INTERNATIONAL */
 
 void BLF_lang_init(void)
@@ -137,4 +141,9 @@ void BLF_lang_set(const char *str)
 	return;
 }
 
+char* BLF_lang_get(void)
+{
+	return "";
+}
+
 #endif /* INTERNATIONAL */
diff --git a/source/blender/blenlib/BLI_fileops.h b/source/blender/blenlib/BLI_fileops.h
index 59c01348c07..27b1a67b32c 100644
--- a/source/blender/blenlib/BLI_fileops.h
+++ b/source/blender/blenlib/BLI_fileops.h
@@ -53,6 +53,7 @@ int   BLI_exists(const char *file);
 int   BLI_copy_fileops(const char *file, const char *to);
 int   BLI_rename(const char *from, const char *to);
 int   BLI_gzip(const char *from, const char *to);
+int   BLI_ungzip_to_mem(const char *from_file, char *to_mem, const int size);
 int   BLI_delete(const char *file, int dir, int recursive);
 int   BLI_move(const char *file, const char *to);
 int   BLI_touch(const char *file);
diff --git a/source/blender/blenlib/BLI_path_util.h b/source/blender/blenlib/BLI_path_util.h
index 81fc8a50db6..3b27e4dafa0 100644
--- a/source/blender/blenlib/BLI_path_util.h
+++ b/source/blender/blenlib/BLI_path_util.h
@@ -98,6 +98,7 @@ char *BLI_get_folder_version(const int id, const int ver, const int do_check);
 #endif
 
 void BLI_setenv(const char *env, const char *val);
+char *BLI_getenv(const char *env);
 void BLI_setenv_if_new(const char *env, const char* val);
 
 void BLI_make_file_string(const char *relabase, char *string,  const char *dir, const char *file);
diff --git a/source/blender/blenlib/intern/fileops.c b/source/blender/blenlib/intern/fileops.c
index 2e0f4b483b1..b72f31dd128 100644
--- a/source/blender/blenlib/intern/fileops.c
+++ b/source/blender/blenlib/intern/fileops.c
@@ -102,6 +102,24 @@ int BLI_gzip(const char *from, const char *to) {
 	return rval;
 }
 
+/* gzip the file in from_file and write it to memery to_mem, at most size bytes.
+   return the unziped size
+  */
+int BLI_ungzip_to_mem(const char *from_file, char *to_mem, const int size)
+{
+	gzFile gzfile;
+	int readsize;
+
+	gzfile = gzopen( from_file, "rb" );
+	readsize = gzread( gzfile, to_mem, size);
+
+	if (readsize < 0)
+        readsize = EOF;
+
+	return readsize;
+}
+
+
 /* return 1 when file can be written */
 int BLI_is_writable(const char *filename)
 {
diff --git a/source/blender/blenlib/intern/path_util.c b/source/blender/blenlib/intern/path_util.c
index e0a08d0b890..6d85fd33953 100644
--- a/source/blender/blenlib/intern/path_util.c
+++ b/source/blender/blenlib/intern/path_util.c
@@ -1205,6 +1205,10 @@ void BLI_setenv(const char *env, const char*val)
 #endif
 }
 
+char *BLI_getenv(const char *env)
+{
+	return getenv(env);
+}
 
 /**
  Only set an env var if already not there.
diff --git a/source/blender/editors/datafiles/CMakeLists.txt b/source/blender/editors/datafiles/CMakeLists.txt
index a359b0ef6f5..b0c74ca12fc 100644
--- a/source/blender/editors/datafiles/CMakeLists.txt
+++ b/source/blender/editors/datafiles/CMakeLists.txt
@@ -19,8 +19,10 @@
 #
 # ***** END GPL LICENSE BLOCK *****
 
-set(INC "")
-
+set(INC
+	../../blenlib
+	../../../../intern/guardedalloc
+)
 set(SRC
 	Bfont.c
 	add.png.c
@@ -29,6 +31,7 @@ set(SRC
 	blob.png.c
 	blur.png.c
 	bmonofont.ttf.c
+	bunifont.ttf.c
 	clay.png.c
 	clone.png.c
 	crease.png.c
diff --git a/source/blender/editors/datafiles/bunifont.ttf.c b/source/blender/editors/datafiles/bunifont.ttf.c
new file mode 100755
index 00000000000..dd2acb0cb52
--- /dev/null
+++ b/source/blender/editors/datafiles/bunifont.ttf.c
@@ -0,0 +1,40 @@
+/** \file blender/editors/datafiles/bunifont.ttf.c
+ *  \ingroup eddatafiles
+ */
+/* DataToC output of file <bfont_ttf> */
+
+#include <zlib.h>
+#include <stdio.h>
+#include "BLI_path_util.h"
+#include "BLI_string.h"
+#include "BLI_fileops.h"
+#include "BLI_memarena.h"
+#include "MEM_guardedalloc.h"
+
+const int datatoc_bunifont_ttf_size = 16336376;
+static char* datatoc_bunifont_ttf = 0;
+
+static char unifont_path[1024];
+static char unifont_filename[]="unifont-5.1.20080907.ttf.zip";
+
+char *get_datatoc_bunifont_ttf(void)
+{
+    if( datatoc_bunifont_ttf==NULL )
+    {
+        char *fontpath = BLI_get_folder(BLENDER_DATAFILES, "fonts");
+        BLI_snprintf( unifont_path, sizeof(unifont_path), "%s/%s", fontpath, unifont_filename );
+
+        if( BLI_exists(unifont_path) )
+        {
+			datatoc_bunifont_ttf = (char*)MEM_mallocN( datatoc_bunifont_ttf_size, "get_datatoc_bunifont_ttf" );
+			BLI_ungzip_to_mem( unifont_path, datatoc_bunifont_ttf, datatoc_bunifont_ttf_size );
+        }
+    }
+    return datatoc_bunifont_ttf;
+}
+
+void free_datatoc_bunifont_ttf(void)
+{
+	if( datatoc_bunifont_ttf!=NULL )
+		MEM_freeN( datatoc_bunifont_ttf );
+}
diff --git a/source/blender/editors/include/ED_datafiles.h b/source/blender/editors/include/ED_datafiles.h
index ee29df3fffb..6831f80092c 100644
--- a/source/blender/editors/include/ED_datafiles.h
+++ b/source/blender/editors/include/ED_datafiles.h
@@ -56,6 +56,9 @@ extern char datatoc_bfont_ttf[];
 extern int datatoc_bmonofont_ttf_size;
 extern char datatoc_bmonofont_ttf[];
 
+extern int datatoc_bunifont_ttf_size;
+extern char* get_datatoc_bunifont_ttf();
+
 /* Brush icon datafiles */
 /* TODO: this could be simplified by putting all
    the brush icons in one file */
diff --git a/source/blender/editors/interface/interface_style.c b/source/blender/editors/interface/interface_style.c
index 2e4106b3c04..9ebf7c9cd4f 100644
--- a/source/blender/editors/interface/interface_style.c
+++ b/source/blender/editors/interface/interface_style.c
@@ -76,7 +76,7 @@
 
 /* ********************************************** */
 
-static uiStyle *ui_style_new(ListBase *styles, const char *name)
+static uiStyle *ui_style_new(ListBase *styles, const char *name, short fontid)
 {
 	uiStyle *style= MEM_callocN(sizeof(uiStyle), "new style");
 	
@@ -85,7 +85,7 @@ static uiStyle *ui_style_new(ListBase *styles, const char *name)
 	
 	style->panelzoom= 1.0;
 
-	style->paneltitle.uifont_id= UIFONT_DEFAULT;
+	style->paneltitle.uifont_id= fontid;
 	style->paneltitle.points= 12;
 	style->paneltitle.kerning= 1;
 	style->paneltitle.shadow= 1;
@@ -94,7 +94,7 @@ static uiStyle *ui_style_new(ListBase *styles, const char *name)
 	style->paneltitle.shadowalpha= 0.15f;
 	style->paneltitle.shadowcolor= 1.0f;
 	
-	style->grouplabel.uifont_id= UIFONT_DEFAULT;
+	style->grouplabel.uifont_id= fontid;
 	style->grouplabel.points= 12;
 	style->grouplabel.kerning= 1;
 	style->grouplabel.shadow= 3;
@@ -102,7 +102,7 @@ static uiStyle *ui_style_new(ListBase *styles, const char *name)
 	style->grouplabel.shady= -1;
 	style->grouplabel.shadowalpha= 0.25f;
 	
-	style->widgetlabel.uifont_id= UIFONT_DEFAULT;
+	style->widgetlabel.uifont_id= fontid;
 	style->widgetlabel.points= 11;
 	style->widgetlabel.kerning= 1;
 	style->widgetlabel.shadow= 3;
@@ -111,7 +111,7 @@ static uiStyle *ui_style_new(ListBase *styles, const char *name)
 	style->widgetlabel.shadowalpha= 0.15f;
 	style->widgetlabel.shadowcolor= 1.0f;
 	
-	style->widget.uifont_id= UIFONT_DEFAULT;
+	style->widget.uifont_id= fontid;
 	style->widget.points= 11;
 	style->widget.kerning= 1;
 	style->widget.shadowalpha= 0.25f;
@@ -295,6 +295,7 @@ void uiStyleInit(void)
 {
 	uiFont *font= U.uifonts.first;
 	uiStyle *style= U.uistyles.first;
+	char *lang_set= BLF_lang_get();
 	
 	/* recover from uninitialized dpi */
 	if(U.dpi == 0)
@@ -335,11 +336,7 @@ void uiStyleInit(void)
 			BLF_size(font->blf_id, 14, U.dpi);
 		}
 	}
-	
-	if(style==NULL) {
-		ui_style_new(&U.uistyles, "Default Style");
-	}
-	
+
 	// XXX, this should be moved into a style, but for now best only load the monospaced font once.
 	if (blf_mono_font == -1)
 		blf_mono_font= BLF_load_mem_unique("monospace", (unsigned char *)datatoc_bmonofont_ttf, datatoc_bmonofont_ttf_size);
@@ -351,6 +348,46 @@ void uiStyleInit(void)
 		blf_mono_font_render= BLF_load_mem_unique("monospace", (unsigned char *)datatoc_bmonofont_ttf, datatoc_bmonofont_ttf_size);
 
 	BLF_size(blf_mono_font_render, 12, 72);
+
+	/* XXX Maybe it's bad to do this */
+	if(style==NULL) {
+		if( strcmp(lang_set,"hr.UTF-8")==0
+			|| strcmp(lang_set,"ar.UTF-8")==0
+			|| strcmp(lang_set,"bg.UTF-8")==0
+			|| strcmp(lang_set,"ca.UTF-8")==0
+			|| strcmp(lang_set,"cs.UTF-8")==0
+			|| strcmp(lang_set,"de.UTF-8")==0
+			|| strcmp(lang_set,"el.UTF-8")==0
+			|| strcmp(lang_set,"es.UTF-8")==0
+			|| strcmp(lang_set,"fi.UTF-8")==0
+			|| strcmp(lang_set,"fr.UTF-8")==0
+			|| strcmp(lang_set,"it.UTF-8")==0
+			|| strcmp(lang_set,"ja.UTF-8")==0
+			|| strcmp(lang_set,"ko.UTF-8")==0
+			|| strcmp(lang_set,"pl.UTF-8")==0
+			|| strcmp(lang_set,"ro.UTF-8")==0
+			|| strcmp(lang_set,"ru.UTF-8")==0
+			|| strcmp(lang_set,"sr.UTF-8")==0
+			|| strcmp(lang_set,"sv.UTF-8")==0
+			|| strcmp(lang_set,"uk.UTF-8")==0
+			|| strcmp(lang_set,"zh_CN.UTF-8")==0
+			)
+		{
+			// load unifont only when need. It takes 15MB memories
+			// get_datatoc_bunifont_ttf() may return null, BLF_load_mem_unique() will handle it
+			if( blf_unifont == -1 )
+				blf_unifont= BLF_load_mem_unique("unifont", (unsigned char *)get_datatoc_bunifont_ttf(), datatoc_bunifont_ttf_size);
+			if( blf_unifont != -1 )
+			{
+				BLF_size(blf_unifont, 12, 72);
+				ui_style_new(&U.uistyles, "Unifont Style", blf_unifont );
+			}
+			else
+				ui_style_new(&U.uistyles, "Default Style", UIFONT_DEFAULT );
+		}
+		else
+			ui_style_new(&U.uistyles, "Default Style", UIFONT_DEFAULT );
+	}
 }
 
 void uiStyleFontSet(uiFontStyle *fs)
diff --git a/source/blender/windowmanager/intern/wm_init_exit.c b/source/blender/windowmanager/intern/wm_init_exit.c
index 2e4148ca51d..a27be49af43 100644
--- a/source/blender/windowmanager/intern/wm_init_exit.c
+++ b/source/blender/windowmanager/intern/wm_init_exit.c
@@ -139,6 +139,10 @@ void WM_init(bContext *C, int argc, const char **argv)
 	
 	BLF_init(11, U.dpi); /* Please update source/gamengine/GamePlayer/GPG_ghost.cpp if you change this */
 	BLF_lang_init();
+	// use default settings
+	BLF_lang_encoding("");
+	BLF_lang_set("");
+
 	/* get the default database, plus a wm */
 	WM_read_homefile(C, NULL, G.factory_startup);
 
@@ -337,6 +341,7 @@ extern void free_anim_copybuf(void);
 extern void free_anim_drivers_copybuf(void); 
 extern void free_fmodifiers_copybuf(void); 
 extern void free_posebuf(void); 
+extern void free_datatoc_bunifont_ttf(void);
 
 /* called in creator.c even... tsk, split this! */
 void WM_exit(bContext *C)
@@ -375,7 +380,7 @@ void WM_exit(bContext *C)
 	BIF_freeTemplates(C);
 	
 	free_ttfont(); /* bke_font.h */
-	
+	free_datatoc_bunifont_ttf(); /* bunifont.ttf.c */
 	free_openrecent();
 	
 	BKE_freecubetable();
diff --git a/source/creator/CMakeLists.txt b/source/creator/CMakeLists.txt
index aea48d88b47..4bb0437ed6f 100644
--- a/source/creator/CMakeLists.txt
+++ b/source/creator/CMakeLists.txt
@@ -346,7 +346,9 @@ if(UNIX AND NOT APPLE)
 		)
 
 		install(
-			DIRECTORY ${CMAKE_SOURCE_DIR}/release/bin/.blender/locale
+			DIRECTORY
+					${CMAKE_SOURCE_DIR}/release/bin/.blender/locale
+					${CMAKE_SOURCE_DIR}/release/datafiles/fonts
 			DESTINATION ${TARGETDIR_VER}/datafiles
 			PATTERN ".svn" EXCLUDE
 		)
@@ -421,7 +423,9 @@ elseif(WIN32)
 			DESTINATION ${TARGETDIR_VER}/config
 		)
 		install(
-			DIRECTORY ${CMAKE_SOURCE_DIR}/release/bin/.blender/locale
+			DIRECTORY
+					${CMAKE_SOURCE_DIR}/release/bin/.blender/locale
+					${CMAKE_SOURCE_DIR}/release/datafiles/fonts
 			DESTINATION ${TARGETDIR_VER}/datafiles
 			PATTERN ".svn" EXCLUDE
 		)
@@ -677,7 +681,9 @@ elseif(APPLE)
 		)
 
 		install_dir(
-			${CMAKE_SOURCE_DIR}/release/bin/.blender/locale/
+			DIRECTORY
+					${CMAKE_SOURCE_DIR}/release/bin/.blender/locale
+					${CMAKE_SOURCE_DIR}/release/datafiles/fonts
 			\${TARGETDIR_VER}/datafiles/locale
 		)
 	endif()
diff --git a/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp b/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
index 7a98c7e09b0..522efb0cd8e 100644
--- a/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
+++ b/source/gameengine/GamePlayer/ghost/GPG_ghost.cpp
@@ -413,6 +413,10 @@ int main(int argc, char** argv)
 	// Setup builtin font for BLF (mostly copied from creator.c, wm_init_exit.c and interface_style.c)
 	BLF_init(11, U.dpi);
 	BLF_lang_init();
+	// use default settings
+	BLF_lang_encoding("");
+	BLF_lang_set("");
+
 	BLF_load_mem("default", (unsigned char*)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
  
 	// Parse command line options