translations: Add Simplified Chinese language support

components/retro-go/config.h

@@ -166,3 +166,10 @@
 #ifndef RG_FONT_DEFAULT
 #define RG_FONT_DEFAULT RG_FONT_VERA_11
 #endif
+
+#ifndef RG_FONT_CHINESE
+#define RG_FONT_CHINESE RG_FONT_FUSIONPIXEL_12
+#endif
+
+// Will be moved elsewhere, this is for testing
+#define RG_CHINESE_SUPPORT 1

components/retro-go/fonts/fonts.h

@@ -10,6 +10,7 @@ extern const rg_font_t font_DejaVu12;
 extern const rg_font_t font_DejaVu15;
 extern const rg_font_t font_VeraBold11;
 extern const rg_font_t font_VeraBold14;
+extern const rg_font_t font_FusionPixel;
 
 enum {
     RG_FONT_BASIC_8,
@@ -19,6 +20,9 @@ enum {
     RG_FONT_DEJAVU_15,
     RG_FONT_VERA_11,
     RG_FONT_VERA_14,
+#if RG_CHINESE_SUPPORT
+    RG_FONT_FUSIONPIXEL_12,
+#endif
     RG_FONT_MAX,
 };
 
@@ -30,4 +34,7 @@ static const rg_font_t *fonts[RG_FONT_MAX] = {
     &font_DejaVu15,
     &font_VeraBold11,
     &font_VeraBold14,
+#if RG_CHINESE_SUPPORT
+    &font_FusionPixel,
+#endif
 };

components/retro-go/rg_gui.c

@@ -119,6 +119,15 @@ void rg_gui_init(void)
 
 bool rg_gui_set_language_id(int index)
 {
+    if (index == RG_LANG_CHS)
+    {
+#if RG_CHINESE_SUPPORT
+        rg_gui_set_font(RG_FONT_CHINESE);
+#else
+        RG_LOGE("Chinese font not included, impossible to switch to Chinese!");
+        return false;
+#endif
+    }
     if (rg_localization_set_language_id(index))
     {
         rg_settings_set_number(NS_GLOBAL, SETTING_LANGUAGE, index);
@@ -222,6 +231,14 @@ bool rg_gui_set_font(int index)
     if (index < 0 || index > RG_FONT_MAX - 1)
         return false;
 
+#if RG_CHINESE_SUPPORT
+    if (rg_localization_get_language_id() == RG_LANG_CHS && index != RG_FONT_CHINESE)
+    {
+        RG_LOGW("When the language is set to Chinese, only the Chinese font can be used!");
+        index = RG_FONT_CHINESE;
+    }
+#endif
+
     gui.font = fonts[index];
     gui.font_index = index;
     gui.font_height = (index < 3) ? (8 + index * 4) : gui.font->height;
@@ -1678,6 +1695,7 @@ static rg_gui_event_t language_cb(rg_gui_option_t *option, rg_gui_event_t event)
 
     if (event == RG_DIALOG_ENTER)
     {
+        // FIXME: Hide languages that can't be displayed because of a missing font (eg Chinese)
         rg_gui_option_t options[RG_LANG_MAX + 1];
         for (int i = 0; i < RG_LANG_MAX; i++)
             options[i] = (rg_gui_option_t){i, rg_localization_get_language_name(i), NULL, RG_DIALOG_FLAG_NORMAL, NULL};

components/retro-go/rg_localization.h

@@ -10,6 +10,7 @@ typedef enum
     RG_LANG_EN = 0,
     RG_LANG_FR,
     RG_LANG_DE,
+    RG_LANG_CHS,
   //RG_LANG_ES,
 
     RG_LANG_MAX