Instance Method

contentsAreFlipped()

Returns a Boolean indicating whether the layer content is implicitly flipped when rendered.

Declaration

func contentsAreFlipped() -> Bool

Return Value

true if the layer contents are implicitly flipped when rendered or false if they are not. This method returns false by default.

Discussion

This method provides information about whether the layer’s contents are being flipped during drawing. You should not attempt to override this method and return a different value.

If the layer needs to flip its content, it returns true from this method and applies a y-flip transform to the graphics context before passing it to the layer’s draw(in:) method. Similarly, the layer converts any rectangles passed to its setNeedsDisplay(_:) into the flipped coordinate space.

See Also

Configuring the Layer’s Rendering Behavior

var isOpaque: Bool

A Boolean value indicating whether the layer contains completely opaque content.

var edgeAntialiasingMask: CAEdgeAntialiasingMask

A bitmask defining how the edges of the receiver are rasterized.

var isGeometryFlipped: Bool

A Boolean that indicates whether the geometry of the layer and its sublayers is flipped vertically.

var drawsAsynchronously: Bool

A Boolean indicating whether drawing commands are deferred and processed asynchronously in a background thread.

var shouldRasterize: Bool

A Boolean that indicates whether the layer is rendered as a bitmap before compositing. Animatable

var rasterizationScale: CGFloat

The scale at which to rasterize content, relative to the coordinate space of the layer. Animatable

var contentsFormat: CALayerContentsFormat

A hint for the desired storage format of the layer contents.

func render(in: CGContext)

Renders the layer and its sublayers into the specified context.

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