added zr_input_unicode as another text input method

demo/x11/xlib.c

@@ -348,7 +348,7 @@ draw(XSurface *surf, struct zr_command_queue *queue)
         case ZR_COMMAND_TEXT: {
             const struct zr_command_text *t = zr_command(text, cmd);
             surface_draw_text(surf, t->x, t->y, t->w, t->h, (const char*)t->string,
-                    t->length, (XFont*)t->font->userdata.ptr, t->background, t->foreground);
+                t->length, (XFont*)t->font->userdata.ptr, t->background, t->foreground);
         } break;
         case ZR_COMMAND_CURVE:
         case ZR_COMMAND_IMAGE:
@@ -385,7 +385,8 @@ input_key(struct XWindow *xw, struct zr_input *in, XEvent *evt, zr_bool down)
             zr_input_key(in, ZR_KEY_PASTE, down && (evt->xkey.state & ControlMask));
         else if (*code == 'x')
             zr_input_key(in, ZR_KEY_CUT, down && (evt->xkey.state & ControlMask));
-        if (!down) zr_input_char(in, (char)*code);
+        if (!down)
+            zr_input_unicode(in, (zr_uint)*code);
     }
     XFree(code);
 }

zahnrad.c

@@ -728,6 +728,16 @@ zr_input_char(struct zr_input *in, char c)
     zr_input_glyph(in, glyph);
 }
 
+void
+zr_input_unicode(struct zr_input *in, zr_uint unicode)
+{
+    zr_size len;
+    zr_glyph rune;
+    ZR_ASSERT(in);
+    zr_utf_encode(unicode, rune, ZR_UTF_SIZE);
+    zr_input_glyph(in, rune);
+}
+
 void
 zr_input_end(struct zr_input *in)
 {

zahnrad.h

@@ -336,6 +336,11 @@ void zr_input_char(struct zr_input*, char);
     Input:
     - character to add to the text buffer
 */
+void zr_input_unicode(struct zr_input *in, zr_uint unicode);
+/* this function adds a unicode character into the internal text frame buffer
+    Input:
+    - unicode character to add to the text buffer
+*/
 void zr_input_end(struct zr_input*);
 /* this function sets the input state to readable */
 zr_bool zr_input_has_mouse_click_in_rect(const struct zr_input*,enum zr_buttons,