Add an hinting mode setting to DynamicFonts

- Editor font hinting can now be tweaked in the Editor Settings.
- DynamicFonts used in projects now have tweakable hinting settings
  in their DynamicFontData child. Changes will be visible upon
  reloading the scene in the editor.

(cherry picked from commit c1544c12ef)

editor/editor_fonts.cpp

@@ -103,9 +103,11 @@ void editor_register_fonts(Ref<Theme> p_theme) {
 	/* Custom font */
 
 	String custom_font = EditorSettings::get_singleton()->get("interface/editor/main_font");
+	DynamicFontData::Hinting font_hinting = (DynamicFontData::Hinting)(int)EditorSettings::get_singleton()->get("interface/editor/main_font_hinting");
 	Ref<DynamicFontData> CustomFont;
 	if (custom_font.length() > 0) {
 		CustomFont.instance();
+		CustomFont->set_hinting(font_hinting);
 		CustomFont->set_font_path(custom_font);
 		CustomFont->set_force_autohinter(true); //just looks better..i think?
 	}
@@ -113,9 +115,11 @@ void editor_register_fonts(Ref<Theme> p_theme) {
 	/* Custom source code font */
 
 	String custom_font_source = EditorSettings::get_singleton()->get("interface/editor/code_font");
+	DynamicFontData::Hinting font_source_hinting = (DynamicFontData::Hinting)(int)EditorSettings::get_singleton()->get("interface/editor/code_font_hinting");
 	Ref<DynamicFontData> CustomFontSource;
 	if (custom_font_source.length() > 0) {
 		CustomFontSource.instance();
+		CustomFontSource->set_hinting(font_source_hinting);
 		CustomFontSource->set_font_path(custom_font_source);
 	}
 
@@ -123,38 +127,45 @@ void editor_register_fonts(Ref<Theme> p_theme) {
 
 	Ref<DynamicFontData> DefaultFont;
 	DefaultFont.instance();
+	DefaultFont->set_hinting(font_hinting);
 	DefaultFont->set_font_ptr(_font_NotoSansUI_Regular, _font_NotoSansUI_Regular_size);
 	DefaultFont->set_force_autohinter(true); //just looks better..i think?
 
 	Ref<DynamicFontData> FontFallback;
 	FontFallback.instance();
+	FontFallback->set_hinting(font_hinting);
 	FontFallback->set_font_ptr(_font_DroidSansFallback, _font_DroidSansFallback_size);
 	FontFallback->set_force_autohinter(true); //just looks better..i think?
 
 	Ref<DynamicFontData> FontJapanese;
 	FontJapanese.instance();
+	FontJapanese->set_hinting(font_hinting);
 	FontJapanese->set_font_ptr(_font_DroidSansJapanese, _font_DroidSansJapanese_size);
 	FontJapanese->set_force_autohinter(true); //just looks better..i think?
 
 	Ref<DynamicFontData> FontArabic;
 	FontArabic.instance();
+	FontArabic->set_hinting(font_hinting);
 	FontArabic->set_font_ptr(_font_NotoNaskhArabicUI_Regular, _font_NotoNaskhArabicUI_Regular_size);
 	FontArabic->set_force_autohinter(true); //just looks better..i think?
 
 	Ref<DynamicFontData> FontHebrew;
 	FontHebrew.instance();
+	FontHebrew->set_hinting(font_hinting);
 	FontHebrew->set_font_ptr(_font_NotoSansHebrew_Regular, _font_NotoSansHebrew_Regular_size);
 	FontHebrew->set_force_autohinter(true); //just looks better..i think?
 
 	Ref<DynamicFontData> FontThai;
 	FontThai.instance();
+	FontThai->set_hinting(font_hinting);
 	FontThai->set_font_ptr(_font_NotoSansThaiUI_Regular, _font_NotoSansThaiUI_Regular_size);
 	FontThai->set_force_autohinter(true); //just looks better..i think?
 
-	/* Source Code Pro */
+	/* Hack */
 
 	Ref<DynamicFontData> dfmono;
 	dfmono.instance();
+	dfmono->set_hinting(font_source_hinting);
 	dfmono->set_font_ptr(_font_Hack_Regular, _font_Hack_Regular_size);
 	//dfd->set_force_autohinter(true); //just looks better..i think?
 

editor/editor_settings.cpp

@@ -285,6 +285,10 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	hints["interface/editor/main_font_size"] = PropertyInfo(Variant::INT, "interface/editor/main_font_size", PROPERTY_HINT_RANGE, "10,40,1", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	_initial_set("interface/editor/code_font_size", 14);
 	hints["interface/editor/code_font_size"] = PropertyInfo(Variant::INT, "interface/editor/code_font_size", PROPERTY_HINT_RANGE, "8,96,1", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
+	_initial_set("interface/editor/main_font_hinting", 2);
+	hints["interface/editor/main_font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/main_font_hinting", PROPERTY_HINT_ENUM, "None,Light,Normal", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
+	_initial_set("interface/editor/code_font_hinting", 2);
+	hints["interface/editor/code_font_hinting"] = PropertyInfo(Variant::INT, "interface/editor/code_font_hinting", PROPERTY_HINT_ENUM, "None,Light,Normal", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	_initial_set("interface/editor/main_font", "");
 	hints["interface/editor/main_font"] = PropertyInfo(Variant::STRING, "interface/editor/main_font", PROPERTY_HINT_GLOBAL_FILE, "*.ttf,*.otf", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	_initial_set("interface/editor/code_font", "");

scene/resources/dynamic_font.cpp

@@ -80,6 +80,14 @@ void DynamicFontData::set_force_autohinter(bool p_force) {
 void DynamicFontData::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_font_path", "path"), &DynamicFontData::set_font_path);
 	ClassDB::bind_method(D_METHOD("get_font_path"), &DynamicFontData::get_font_path);
+	ClassDB::bind_method(D_METHOD("set_hinting", "mode"), &DynamicFontData::set_hinting);
+	ClassDB::bind_method(D_METHOD("get_hinting"), &DynamicFontData::get_hinting);
+
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "hinting", PROPERTY_HINT_ENUM, "None,Light,Normal"), "set_hinting", "get_hinting");
+
+	BIND_ENUM_CONSTANT(HINTING_NONE);
+	BIND_ENUM_CONSTANT(HINTING_LIGHT);
+	BIND_ENUM_CONSTANT(HINTING_NORMAL);
 
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "font_path", PROPERTY_HINT_FILE, "*.ttf,*.otf"), "set_font_path", "get_font_path");
 }
@@ -87,6 +95,7 @@ void DynamicFontData::_bind_methods() {
 DynamicFontData::DynamicFontData() {
 
 	force_autohinter = false;
+	hinting = DynamicFontData::HINTING_NORMAL;
 	font_mem = NULL;
 	font_mem_size = 0;
 }
@@ -197,8 +206,6 @@ Error DynamicFontAtSize::_load() {
 	if (id.filter)
 		texture_flags |= Texture::FLAG_FILTER;
 
-	//print_line("ASCENT: "+itos(ascent)+" descent "+itos(descent)+" hinted: "+itos(face->face_flags&FT_FACE_FLAG_HINTER));
-
 	valid = true;
 	return OK;
 }
@@ -431,15 +438,28 @@ void DynamicFontAtSize::_update_char(CharType p_char) {
 		char_map[p_char] = ch;
 		return;
 	}
-	int error = FT_Load_Char(face, p_char, FT_LOAD_RENDER | (font->force_autohinter ? FT_LOAD_FORCE_AUTOHINT : 0));
+
+	int ft_hinting;
+
+	switch (font->hinting) {
+		case DynamicFontData::HINTING_NONE:
+			ft_hinting = FT_LOAD_NO_HINTING;
+			break;
+		case DynamicFontData::HINTING_LIGHT:
+			ft_hinting = FT_LOAD_TARGET_LIGHT;
+			break;
+		default:
+			ft_hinting = FT_LOAD_TARGET_NORMAL;
+			break;
+	}
+
+	int error = FT_Load_Char(face, p_char, FT_HAS_COLOR(face) ? FT_LOAD_COLOR : FT_LOAD_DEFAULT | (font->force_autohinter ? FT_LOAD_FORCE_AUTOHINT : 0) | ft_hinting);
 	if (!error) {
 		error = FT_Render_Glyph(face->glyph, ft_render_mode_normal);
 	}
 	if (error) {
 
 		int advance = 0;
-		//stbtt_GetCodepointHMetrics(&font->info, p_char, &advance, 0);
-		//print_line("char has no bitmap: "+itos(p_char)+" but advance is "+itos(advance*scale));
 		Character ch;
 		ch.texture_idx = -1;
 		ch.advance = advance;
@@ -454,7 +474,6 @@ void DynamicFontAtSize::_update_char(CharType p_char) {
 
 	int w = slot->bitmap.width;
 	int h = slot->bitmap.rows;
-	//int p = slot->bitmap.pitch;
 	int yofs = slot->bitmap_top;
 	int xofs = slot->bitmap_left;
 	int advance = slot->advance.x >> 6;
@@ -508,8 +527,6 @@ void DynamicFontAtSize::_update_char(CharType p_char) {
 		break;
 	}
 
-	//print_line("CHAR: "+String::chr(p_char)+" TEX INDEX: "+itos(tex_index)+" X: "+itos(tex_x)+" Y: "+itos(tex_y));
-
 	if (tex_index == -1) {
 		//could not find texture to fit, create one
 		tex_x = 0;
@@ -610,8 +627,6 @@ void DynamicFontAtSize::_update_char(CharType p_char) {
 	chr.rect.position /= oversampling;
 	chr.rect.size /= oversampling;
 
-	//print_line("CHAR: "+String::chr(p_char)+" TEX INDEX: "+itos(tex_index)+" RECT: "+chr.rect+" X OFS: "+itos(xofs)+" Y OFS: "+itos(yofs));
-
 	char_map[p_char] = chr;
 }
 
@@ -722,6 +737,18 @@ void DynamicFont::set_use_filter(bool p_enable) {
 	_reload_cache();
 }
 
+DynamicFontData::Hinting DynamicFontData::get_hinting() const {
+
+	return hinting;
+}
+
+void DynamicFontData::set_hinting(Hinting p_hinting) {
+
+	if (hinting == p_hinting)
+		return;
+	hinting = p_hinting;
+}
+
 int DynamicFont::get_spacing(int p_type) const {
 
 	if (p_type == SPACING_TOP) {

scene/resources/dynamic_font.h

@@ -64,10 +64,20 @@ public:
 		}
 	};
 
+	enum Hinting {
+		HINTING_NONE,
+		HINTING_LIGHT,
+		HINTING_NORMAL
+	};
+
+	Hinting get_hinting() const;
+	void set_hinting(Hinting p_hinting);
+
 private:
 	const uint8_t *font_mem;
 	int font_mem_size;
 	bool force_autohinter;
+	Hinting hinting;
 
 	String font_path;
 	Map<CacheID, DynamicFontAtSize *> size_cache;
@@ -91,6 +101,8 @@ public:
 	~DynamicFontData();
 };
 
+VARIANT_ENUM_CAST(DynamicFontData::Hinting);
+
 class DynamicFontAtSize : public Reference {
 
 	GDCLASS(DynamicFontAtSize, Reference)