[TextServer] Silently skip invalid system fallback fonts.

modules/text_server_adv/text_server_adv.cpp

@@ -1357,7 +1357,7 @@ _FORCE_INLINE_ bool TextServerAdvanced::_ensure_glyph(FontAdvanced *p_font_data,
 	return false;
 }
 
-_FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_font_data, const Vector2i &p_size, FontForSizeAdvanced *&r_cache_for_size) const {
+_FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_font_data, const Vector2i &p_size, FontForSizeAdvanced *&r_cache_for_size, bool p_silent) const {
 	ERR_FAIL_COND_V(p_size.x <= 0, false);
 
 	HashMap<Vector2i, FontForSizeAdvanced *>::Iterator E = p_font_data->cache.find(p_size);
@@ -1378,7 +1378,11 @@ _FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_f
 				error = FT_Init_FreeType(&ft_library);
 				if (error != 0) {
 					memdelete(fd);
-					ERR_FAIL_V_MSG(false, "FreeType: Error initializing library: '" + String(FT_Error_String(error)) + "'.");
+					if (p_silent) {
+						return false;
+					} else {
+						ERR_FAIL_V_MSG(false, "FreeType: Error initializing library: '" + String(FT_Error_String(error)) + "'.");
+					}
 				}
 #ifdef MODULE_SVG_ENABLED
 				FT_Property_Set(ft_library, "ot-svg", "svg-hooks", get_tvg_svg_in_ot_hooks());
@@ -1412,7 +1416,11 @@ _FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_f
 				FT_Done_Face(fd->face);
 				fd->face = nullptr;
 				memdelete(fd);
-				ERR_FAIL_V_MSG(false, "FreeType: Error loading font: '" + String(FT_Error_String(error)) + "'.");
+				if (p_silent) {
+					return false;
+				} else {
+					ERR_FAIL_V_MSG(false, "FreeType: Error loading font: '" + String(FT_Error_String(error)) + "'.");
+				}
 			}
 		}
 
@@ -1847,7 +1855,11 @@ _FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_f
 		}
 #else
 		memdelete(fd);
-		ERR_FAIL_V_MSG(false, "FreeType: Can't load dynamic font, engine is compiled without FreeType support!");
+		if (p_silent) {
+			return false;
+		} else {
+			ERR_FAIL_V_MSG(false, "FreeType: Can't load dynamic font, engine is compiled without FreeType support!");
+		}
 #endif
 	} else {
 		// Init bitmap font.
@@ -1858,6 +1870,16 @@ _FORCE_INLINE_ bool TextServerAdvanced::_ensure_cache_for_size(FontAdvanced *p_f
 	return true;
 }
 
+_FORCE_INLINE_ bool TextServerAdvanced::_font_validate(const RID &p_font_rid) const {
+	FontAdvanced *fd = _get_font_data(p_font_rid);
+	ERR_FAIL_NULL_V(fd, false);
+
+	MutexLock lock(fd->mutex);
+	Vector2i size = _get_size(fd, 16);
+	FontForSizeAdvanced *ffsd = nullptr;
+	return _ensure_cache_for_size(fd, size, ffsd, true);
+}
+
 _FORCE_INLINE_ void TextServerAdvanced::_font_clear_cache(FontAdvanced *p_font_data) {
 	MutexLock ftlock(ft_mutex);
 
@@ -5106,6 +5128,10 @@ RID TextServerAdvanced::_find_sys_font_for_text(const RID &p_fdef, const String
 			SystemFontCacheRec sysf;
 			sysf.rid = _create_font();
 			_font_set_data_ptr(sysf.rid, font_data.ptr(), font_data.size());
+			if (!_font_validate(sysf.rid)) {
+				_free_rid(sysf.rid);
+				continue;
+			}
 
 			Dictionary var = dvar;
 			// Select matching style from collection.

modules/text_server_adv/text_server_adv.h

@@ -365,7 +365,8 @@ class TextServerAdvanced : public TextServerExtension {
 	_FORCE_INLINE_ FontGlyph rasterize_bitmap(FontForSizeAdvanced *p_data, int p_rect_margin, FT_Bitmap p_bitmap, int p_yofs, int p_xofs, const Vector2 &p_advance, bool p_bgra) const;
 #endif
 	_FORCE_INLINE_ bool _ensure_glyph(FontAdvanced *p_font_data, const Vector2i &p_size, int32_t p_glyph, FontGlyph &r_glyph) const;
-	_FORCE_INLINE_ bool _ensure_cache_for_size(FontAdvanced *p_font_data, const Vector2i &p_size, FontForSizeAdvanced *&r_cache_for_size) const;
+	_FORCE_INLINE_ bool _ensure_cache_for_size(FontAdvanced *p_font_data, const Vector2i &p_size, FontForSizeAdvanced *&r_cache_for_size, bool p_silent = false) const;
+	_FORCE_INLINE_ bool _font_validate(const RID &p_font_rid) const;
 	_FORCE_INLINE_ void _font_clear_cache(FontAdvanced *p_font_data);
 	static void _generateMTSDF_threaded(void *p_td, uint32_t p_y);
 

modules/text_server_fb/text_server_fb.cpp

@@ -791,7 +791,7 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_glyph(FontFallback *p_font_data,
 	return false;
 }
 
-_FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_font_data, const Vector2i &p_size, FontForSizeFallback *&r_cache_for_size) const {
+_FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_font_data, const Vector2i &p_size, FontForSizeFallback *&r_cache_for_size, bool p_silent) const {
 	ERR_FAIL_COND_V(p_size.x <= 0, false);
 
 	HashMap<Vector2i, FontForSizeFallback *>::Iterator E = p_font_data->cache.find(p_size);
@@ -813,7 +813,11 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_f
 				error = FT_Init_FreeType(&ft_library);
 				if (error != 0) {
 					memdelete(fd);
-					ERR_FAIL_V_MSG(false, "FreeType: Error initializing library: '" + String(FT_Error_String(error)) + "'.");
+					if (p_silent) {
+						return false;
+					} else {
+						ERR_FAIL_V_MSG(false, "FreeType: Error initializing library: '" + String(FT_Error_String(error)) + "'.");
+					}
 				}
 #ifdef MODULE_SVG_ENABLED
 				FT_Property_Set(ft_library, "ot-svg", "svg-hooks", get_tvg_svg_in_ot_hooks());
@@ -847,7 +851,11 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_f
 				FT_Done_Face(fd->face);
 				fd->face = nullptr;
 				memdelete(fd);
-				ERR_FAIL_V_MSG(false, "FreeType: Error loading font: '" + String(FT_Error_String(error)) + "'.");
+				if (p_silent) {
+					return false;
+				} else {
+					ERR_FAIL_V_MSG(false, "FreeType: Error loading font: '" + String(FT_Error_String(error)) + "'.");
+				}
 			}
 		}
 
@@ -980,7 +988,11 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_f
 		}
 #else
 		memdelete(fd);
-		ERR_FAIL_V_MSG(false, "FreeType: Can't load dynamic font, engine is compiled without FreeType support!");
+		if (p_silent) {
+			return false;
+		} else {
+			ERR_FAIL_V_MSG(false, "FreeType: Can't load dynamic font, engine is compiled without FreeType support!");
+		}
 #endif
 	}
 
@@ -989,6 +1001,16 @@ _FORCE_INLINE_ bool TextServerFallback::_ensure_cache_for_size(FontFallback *p_f
 	return true;
 }
 
+_FORCE_INLINE_ bool TextServerFallback::_font_validate(const RID &p_font_rid) const {
+	FontFallback *fd = _get_font_data(p_font_rid);
+	ERR_FAIL_NULL_V(fd, false);
+
+	MutexLock lock(fd->mutex);
+	Vector2i size = _get_size(fd, 16);
+	FontForSizeFallback *ffsd = nullptr;
+	return _ensure_cache_for_size(fd, size, ffsd, true);
+}
+
 _FORCE_INLINE_ void TextServerFallback::_font_clear_cache(FontFallback *p_font_data) {
 	MutexLock ftlock(ft_mutex);
 
@@ -3920,6 +3942,10 @@ RID TextServerFallback::_find_sys_font_for_text(const RID &p_fdef, const String
 				SystemFontCacheRec sysf;
 				sysf.rid = _create_font();
 				_font_set_data_ptr(sysf.rid, font_data.ptr(), font_data.size());
+				if (!_font_validate(sysf.rid)) {
+					_free_rid(sysf.rid);
+					continue;
+				}
 
 				Dictionary var = dvar;
 				// Select matching style from collection.

modules/text_server_fb/text_server_fb.h

@@ -314,7 +314,8 @@ class TextServerFallback : public TextServerExtension {
 	_FORCE_INLINE_ FontGlyph rasterize_bitmap(FontForSizeFallback *p_data, int p_rect_margin, FT_Bitmap p_bitmap, int p_yofs, int p_xofs, const Vector2 &p_advance, bool p_bgra) const;
 #endif
 	_FORCE_INLINE_ bool _ensure_glyph(FontFallback *p_font_data, const Vector2i &p_size, int32_t p_glyph, FontGlyph &r_glyph) const;
-	_FORCE_INLINE_ bool _ensure_cache_for_size(FontFallback *p_font_data, const Vector2i &p_size, FontForSizeFallback *&r_cache_for_size) const;
+	_FORCE_INLINE_ bool _ensure_cache_for_size(FontFallback *p_font_data, const Vector2i &p_size, FontForSizeFallback *&r_cache_for_size, bool p_silent = false) const;
+	_FORCE_INLINE_ bool _font_validate(const RID &p_font_rid) const;
 	_FORCE_INLINE_ void _font_clear_cache(FontFallback *p_font_data);
 	static void _generateMTSDF_threaded(void *p_td, uint32_t p_y);