virtualx-engine/doc/classes/Font.xml

<?xml version="1.0" encoding="UTF-8" ?>
<class name="Font" inherits="Resource" version="4.0">
	<brief_description>
		Font class is set of font data sources used to draw text.
	</brief_description>
	<description>
		Font contains a set of glyphs to represent Unicode characters, as well as the ability to draw it with variable width, ascent, descent and kerning.
		[b]Note:[/b] A character is a symbol that represents an item (letter, digit etc.) in an abstract way.
		[b]Note:[/b] A glyph is a bitmap or shape used to draw a one or more characters in a context-dependent manner. Glyph indices are bound to the specific font data source.
		[b]Note:[/b] If a non of the font data sources contain glyphs for a character used in a string, the character in question will be replaced with a box displaying its hexadecimal code.
		[codeblocks]
		[gdscript]
		var font = Font.new()
		font.add_data(load("res://BarlowCondensed-Bold.ttf"))
		$"Label".set("custom_fonts/font", font)
		$"Label".set("custom_fonts/font_size", 64)
		[/gdscript]
		[csharp]
		var font = new Font();
		font.AddData(ResourceLoader.Load&lt;FontData&gt;("res://BarlowCondensed-Bold.ttf"));
		GetNode("Label").Set("custom_fonts/font", font);
		GetNode("Label").Set("custom_font_sizes/font_size", 64);
		[/csharp]
		[/codeblocks]
		To control font substitution priority use [FontData] language and script support.
		Use language overrides to use same [Font] stack for multiple languages:
		[codeblocks]
		[gdscript]
		# Use Naskh font for Persian and Nastaʼlīq font for Urdu text.
		var font_data_fa = load("res://NotoNaskhArabicUI_Regular.ttf");
		font_data_fa.set_language_support_override("fa", true);
		font_data_fa.set_language_support_override("ur", false);

		var font_data_ur = load("res://NotoNastaliqUrdu_Regular.ttf");
		font_data_ur.set_language_support_override("fa", false);
		font_data_ur.set_language_support_override("ur", true);
		[/gdscript]
		[csharp]
		// Use Naskh font for Persian and Nastaʼlīq font for Urdu text.
		var fontDataFA = ResourceLoader.Load&lt;FontData&gt;("res://NotoNaskhArabicUI_Regular.ttf");
		fontDataFA.SetLanguageSupportOverride("fa", true);
		fontDataFA.SetLanguageSupportOverride("ur", false);

		var fontDataUR = ResourceLoader.Load&lt;FontData&gt;("res://NotoNastaliqUrdu_Regular.ttf");
		fontDataUR.SetLanguageSupportOverride("fa", false);
		fontDataUR.SetLanguageSupportOverride("ur", true);
		[/csharp]
		[/codeblocks]
		Use script overrides to specify supported scripts for bitmap font or for less common scripts not directly supported by TrueType format:
		[codeblocks]
		[gdscript]
		# Use specified font for Egyptian hieroglyphs.
		var font_data = load("res://unifont.ttf");
		font_data.set_script_support_override("Egyp", true);
		[/gdscript]
		[csharp]
		// Use specified font for Egyptian hieroglyphs.
		var fontData = ResourceLoader.Load&lt;FontData&gt;("res://unifont.ttf");
		fontData.SetScriptSupportOverride("Egyp", true);
		[/csharp]
		[/codeblocks]
	</description>
	<tutorials>
	</tutorials>
	<methods>
		<method name="add_data">
			<return type="void">
			</return>
			<argument index="0" name="data" type="FontData">
			</argument>
			<description>
				Add font data source to the set.
			</description>
		</method>
		<method name="draw_char" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="canvas_item" type="RID">
			</argument>
			<argument index="1" name="pos" type="Vector2">
			</argument>
			<argument index="2" name="char" type="int">
			</argument>
			<argument index="3" name="next" type="int" default="0">
			</argument>
			<argument index="4" name="size" type="int" default="-1">
			</argument>
			<argument index="5" name="modulate" type="Color" default="Color( 1, 1, 1, 1 )">
			</argument>
			<argument index="6" name="outline_size" type="int" default="0">
			</argument>
			<argument index="7" name="outline_modulate" type="Color" default="Color( 1, 1, 1, 0 )">
			</argument>
			<description>
				Draw a single Unicode character [code]char[/code] into a canvas item using the font, at a given position, with [code]modulate[/code] color, and optionally kerning if [code]next[/code] is passed. [code]position[/code] specifies the baseline, not the top. To draw from the top, [i]ascent[/i] must be added to the Y axis.
				[b]Note:[/b] Do not use this function to draw strings character by character, use [method draw_string] or [TextLine] instead.
			</description>
		</method>
		<method name="draw_multiline_string" qualifiers="const">
			<return type="void">
			</return>
			<argument index="0" name="canvas_item" type="RID">
			</argument>
			<argument index="1" name="pos" type="Vector2">
			</argument>
			<argument index="2" name="text" type="String">
			</argument>
			<argument index="3" name="align" type="int" enum="HAlign" default="0">
			</argument>
			<argument index="4" name="width" type="float" default="-1">
			</argument>
			<argument index="5" name="max_lines" type="int" default="-1">
			</argument>
			<argument index="6" name="size" type="int" default="-1">
			</argument>
			<argument index="7" name="modulate" type="Color" default="Color( 1, 1, 1, 1 )">
			</argument>
			<argument index="8" name="outline_size" type="int" default="0">
			</argument>
			<argument index="9" name="outline_modulate" type="Color" default="Color( 1, 1, 1, 0 )">
			</argument>
			<argument index="10" name="flags" type="int" default="51">
			</argument>
			<description>
				Breaks [code]text[/code] to the lines using rules specified by [code]flags[/code] and draws it into a canvas item using the font, at a given position, with [code]modulate[/code] color, optionally clipping the width and aligning horizontally. [code]position[/code] specifies the baseline of the first line, not the top. To draw from the top, [i]ascent[/i] must be added to the Y axis.
				See also [method CanvasItem.draw_multiline_string].
			</description>
		</method>
		<method name="draw_string" qualifiers="const">
			<return type="void">
			</return>
			<argument index="0" name="canvas_item" type="RID">
			</argument>
			<argument index="1" name="pos" type="Vector2">
			</argument>
			<argument index="2" name="text" type="String">
			</argument>
			<argument index="3" name="align" type="int" enum="HAlign" default="0">
			</argument>
			<argument index="4" name="width" type="float" default="-1">
			</argument>
			<argument index="5" name="size" type="int" default="-1">
			</argument>
			<argument index="6" name="modulate" type="Color" default="Color( 1, 1, 1, 1 )">
			</argument>
			<argument index="7" name="outline_size" type="int" default="0">
			</argument>
			<argument index="8" name="outline_modulate" type="Color" default="Color( 1, 1, 1, 0 )">
			</argument>
			<argument index="9" name="flags" type="int" default="3">
			</argument>
			<description>
				Draw [code]text[/code] into a canvas item using the font, at a given position, with [code]modulate[/code] color, optionally clipping the width and aligning horizontally. [code]position[/code] specifies the baseline, not the top. To draw from the top, [i]ascent[/i] must be added to the Y axis.
				See also [method CanvasItem.draw_string].
			</description>
		</method>
		<method name="get_ascent" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="size" type="int" default="-1">
			</argument>
			<description>
				Returns the average font ascent (number of pixels above the baseline).
				[b]Note:[/b] Real ascent of the string is context-dependent and can be significantly different from the value returned by this function. Use it only as rough estimate (e.g. as the ascent of empty line).
			</description>
		</method>
		<method name="get_char_size" qualifiers="const">
			<return type="Vector2">
			</return>
			<argument index="0" name="char" type="int">
			</argument>
			<argument index="1" name="next" type="int" default="0">
			</argument>
			<argument index="2" name="size" type="int" default="-1">
			</argument>
			<description>
				Returns the size of a character, optionally taking kerning into account if the next character is provided.
				[b]Note:[/b] Do not use this function to calculate width of the string character by character, use [method get_string_size] or [TextLine] instead.
			</description>
		</method>
		<method name="get_data" qualifiers="const">
			<return type="FontData">
			</return>
			<argument index="0" name="idx" type="int">
			</argument>
			<description>
				Returns the font data source at index [code]idx[/code]. If the index does not exist, returns [code]null[/code].
			</description>
		</method>
		<method name="get_data_count" qualifiers="const">
			<return type="int">
			</return>
			<description>
				Returns the number of font data sources.
			</description>
		</method>
		<method name="get_descent" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="size" type="int" default="-1">
			</argument>
			<description>
				Returns the average font descent (number of pixels below the baseline).
				[b]Note:[/b] Real descent of the string is context-dependent and can be significantly different from the value returned by this function. Use it only as rough estimate (e.g. as the descent of empty line).
			</description>
		</method>
		<method name="get_height" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="size" type="int" default="-1">
			</argument>
			<description>
				Returns the total average font height (ascent plus descent) in pixels.
				[b]Note:[/b] Real height of the string is context-dependent and can be significantly different from the value returned by this function. Use it only as rough estimate (e.g. as the height of empty line).
			</description>
		</method>
		<method name="get_multiline_string_size" qualifiers="const">
			<return type="Vector2">
			</return>
			<argument index="0" name="text" type="String">
			</argument>
			<argument index="1" name="width" type="float" default="-1">
			</argument>
			<argument index="2" name="size" type="int" default="-1">
			</argument>
			<argument index="3" name="flags" type="int" default="48">
			</argument>
			<description>
				Returns the size of a bounding box of a string broken into the lines, taking kerning and advance into account.
				See also [method draw_multiline_string].
			</description>
		</method>
		<method name="get_spacing" qualifiers="const">
			<return type="int">
			</return>
			<argument index="0" name="type" type="int">
			</argument>
			<description>
				Returns the spacing for the given [code]type[/code] (see [enum SpacingType]).
			</description>
		</method>
		<method name="get_string_size" qualifiers="const">
			<return type="Vector2">
			</return>
			<argument index="0" name="text" type="String">
			</argument>
			<argument index="1" name="size" type="int" default="-1">
			</argument>
			<description>
				Returns the size size of a bounding box of a string, taking kerning and advance into account.
				See also [method draw_string].
			</description>
		</method>
		<method name="get_supported_chars" qualifiers="const">
			<return type="String">
			</return>
			<description>
				Returns a string containing all the characters available in the font.
				If a given character is included in more than one font data source, it appears only once in the returned string.
			</description>
		</method>
		<method name="get_underline_position" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="size" type="int" default="-1">
			</argument>
			<description>
				Return average pixel offset of the underline below the baseline.
				[b]Note:[/b] Real underline position of the string is context-dependent and can be significantly different from the value returned by this function. Use it only as rough estimate.
			</description>
		</method>
		<method name="get_underline_thickness" qualifiers="const">
			<return type="float">
			</return>
			<argument index="0" name="size" type="int" default="-1">
			</argument>
			<description>
				Return average thickness of the underline.
				[b]Note:[/b] Real underline thickness of the string is context-dependent and can be significantly different from the value returned by this function. Use it only as rough estimate.
			</description>
		</method>
		<method name="has_char" qualifiers="const">
			<return type="bool">
			</return>
			<argument index="0" name="char" type="int">
			</argument>
			<description>
				Return [code]true[/code] if a Unicode [code]char[/code] is available in the font.
			</description>
		</method>
		<method name="remove_data">
			<return type="void">
			</return>
			<argument index="0" name="idx" type="int">
			</argument>
			<description>
				Removes the font data source at index [code]idx[/code]. If the index does not exist, nothing happens.
			</description>
		</method>
		<method name="set_data">
			<return type="void">
			</return>
			<argument index="0" name="idx" type="int">
			</argument>
			<argument index="1" name="data" type="FontData">
			</argument>
			<description>
				Sets the font data source at index [code]idx[/code]. If the index does not exist, nothing happens.
			</description>
		</method>
		<method name="set_spacing">
			<return type="void">
			</return>
			<argument index="0" name="type" type="int">
			</argument>
			<argument index="1" name="value" type="int">
			</argument>
			<description>
				Sets the spacing for [code]type[/code] (see [enum SpacingType]) to [code]value[/code] in pixels (not relative to the font size).
			</description>
		</method>
		<method name="update_changes">
			<return type="void">
			</return>
			<description>
				After editing a font (changing data sources, etc.). Call this function to propagate changes to controls that might use it.
			</description>
		</method>
	</methods>
	<members>
		<member name="extra_spacing_bottom" type="int" setter="set_spacing" getter="get_spacing" default="0">
			Extra spacing at the bottom of the line in pixels.
		</member>
		<member name="extra_spacing_top" type="int" setter="set_spacing" getter="get_spacing" default="0">
			Extra spacing at the top of the line in pixels.
		</member>
	</members>
	<constants>
		<constant name="SPACING_TOP" value="0" enum="SpacingType">
			Spacing at the top of the line.
		</constant>
		<constant name="SPACING_BOTTOM" value="1" enum="SpacingType">
			Spacing at the bottom of the line.
		</constant>
	</constants>
</class>