Base class of anything 2D. Base class of anything 2D. Canvas items are laid out in a tree; children inherit and extend their parent's transform. CanvasItem is extended by [Control] for anything GUI-related, and by [Node2D] for anything related to the 2D engine. Any CanvasItem can draw. For this, [method update] must be called, then [constant NOTIFICATION_DRAW] will be received on idle time to request redraw. Because of this, canvas items don't need to be redrawn on every frame, improving the performance significantly. Several functions for drawing on the CanvasItem are provided (see [code]draw_*[/code] functions). However, they can only be used inside the [method Object._notification], signal or [method _draw] virtual functions. Canvas items are drawn in tree order. By default, children are on top of their parents so a root CanvasItem will be drawn behind everything. This behavior can be changed on a per-item basis. A CanvasItem can also be hidden, which will also hide its children. It provides many ways to change parameters such as modulation (for itself and its children) and self modulation (only for itself), as well as its blend mode. Ultimately, a transform notification can be requested, which will notify the node that its global position changed in case the parent tree changed. https://docs.godotengine.org/en/3.1/tutorials/2d/2d_transforms.html https://docs.godotengine.org/en/3.1/tutorials/2d/custom_drawing_in_2d.html Called (if exists) to draw the canvas item. Draws a string character using a custom font. Returns the advance, depending on the character width and kerning with an optional next character. Draws a colored circle. Draws a colored polygon of any amount of points, convex or concave. Draws a line from a 2D point to another, with a given color and width. It can be optionally antialiased. Draws multiple, parallel lines with a uniform [code]color[/code]. [code]width[/code] and [code]antialiased[/code] are currently not implemented and have no effect. Draws multiple, parallel lines with a uniform [code]width[/code], segment-by-segment coloring, and optional antialiasing. Colors assigned to line segments match by index between [code]points[/code] and [code]colors[/code]. Draws a polygon of any amount of points, convex or concave. Draws interconnected line segments with a uniform [code]color[/code] and [code]width[/code] and optional antialiasing. Draws interconnected line segments with a uniform [code]width[/code], segment-by-segment coloring, and optional antialiasing. Colors assigned to line segments match by index between [code]points[/code] and [code]colors[/code]. Draws a custom primitive. 1 point for a point, 2 points for a line, 3 points for a triangle and 4 points for a quad. Draws a colored rectangle. Sets a custom transform for drawing via components. Anything drawn afterwards will be transformed by this. Sets a custom transform for drawing via matrix. Anything drawn afterwards will be transformed by this. Draws a string using a custom font. Draws a styled rectangle. Draws a texture at a given position. Draws a textured rectangle at a given position, optionally modulated by a color. If [code]transpose[/code] is [code]true[/code], the texture will have its X and Y coordinates swapped. Draws a textured rectangle region at a given position, optionally modulated by a color. If [code]transpose[/code] is [code]true[/code], the texture will have its X and Y coordinates swapped. Returns the [RID] of the [World2D] canvas where this item is in. Returns the canvas item RID used by [VisualServer] for this item. Get the transform matrix of this item's canvas. Get the global position of the mouse. Get the global transform matrix of this item. Get the global transform matrix of this item in relation to the canvas. Get the mouse position relative to this item's position. Get the transform matrix of this item. Get the viewport's boundaries as a [Rect2]. Get this item's transform in relation to the viewport. Get the [World2D] where this item is in. Hide the CanvasItem if it's currently visible. Returns [code]true[/code] if local transform notifications are communicated to children. Returns [code]true[/code] if the node is set as top-level. See [method set_as_toplevel]. Returns [code]true[/code] if global transform notifications are communicated to children. Returns [code]true[/code] if the node is present in the [SceneTree], its [member visible] property is [code]true[/code] and its inherited visibility is also [code]true[/code]. Assigns [code]screen_point[/code] as this node's new local transform. Transformations issued by [code]event[/code]'s inputs are applied in local space instead of global space. If [code]enable[/code] is [code]true[/code], the node won't inherit its transform from parent canvas items. If [code]enable[/code] is [code]true[/code], children will be updated with local transform data. If [code]enable[/code] is [code]true[/code], children will be updated with global transform data. Show the CanvasItem if it's currently hidden. For controls that inherit [Popup], the correct way to make them visible is to call one of the multiple [code]popup*()[/code] functions instead. Queue the CanvasItem for update. [constant NOTIFICATION_DRAW] will be called on idle time to request redraw. The rendering layers in which this [code]CanvasItem[/code] responds to [Light2D] nodes. Default value: [code]1[/code]. The material applied to textures on this [code]CanvasItem[/code]. Default value: [code]null[/code]. The color applied to textures on this [code]CanvasItem[/code]. Default value: [code]Color(1, 1, 1, 1)[/code] (opaque "white"). The color applied to textures on this [code]CanvasItem[/code]. This is not inherited by children [code]CanvasItem[/code]s. Default value: [code]Color(1, 1, 1, 1)[/code] (opaque "white").. If [code]true[/code], the object draws behind its parent. Default value: [code]false[/code]. If [code]true[/code], the object draws on top of its parent. Default value: [code]true[/code]. If [code]true[/code], the parent [code]CanvasItem[/code]'s [member material] property is used as this one's material. Default value: [code]false[/code]. If [code]true[/code], this [code]CanvasItem[/code] is drawn. Default value: [code]true[/code]. For controls that inherit [Popup], the correct way to make them visible is to call one of the multiple [code]popup*()[/code] functions instead. Emitted when the CanvasItem must redraw. This can only be connected realtime, as deferred will not allow drawing. Emitted when becoming hidden. Emitted when the item rect has changed. Emitted when the visibility (hidden/visible) changes. Mix blending mode. Colors are assumed to be independent of the alpha (opacity) value. Additive blending mode. Subtractive blending mode. Multiplicative blending mode. Mix blending mode. Colors are assumed to be premultiplied by the alpha (opacity) value. Disable blending mode. Colors including alpha are written as-is. Only applicable for render targets with a transparent background. No lighting will be applied. The CanvasItem's transform has changed. This notification is only received if enabled by [method set_notify_transform] or [method set_notify_local_transform]. The CanvasItem is requested to draw. The CanvasItem's visibility has changed. The CanvasItem has entered the canvas. The CanvasItem has exited the canvas.