draw(in:from:operation:fraction:respectFlipped:hints:)
Draws all or part of the image in the specified rectangle respecting the hints and the orientation of the current coordinate system.
Declaration
func draw(in dstSpacePortionRect: NSRect, from srcSpacePortionRect: NSRect, operation op: NSCompositingOperation, fraction requestedAlpha: CGFloat, respectFlipped respectContextIsFlipped: Bool, hints: [NSImageRep.HintKey : Any]?)Parameters
- dstSpacePortionRect:
The rectangle in which to draw the image, specified in the current coordinate system.
- srcSpacePortionRect:
The source rectangle specifying the portion of the image you want to draw. The coordinates of this rectangle must be specified using the image’s own coordinate system. If you pass in
NSZeroRect, the entire image is drawn. - op:
The compositing operation to use when drawing the image. See the Nscompositingoperation constants.
- requestedAlpha:
The alpha of the image, specified as a value from 0.0 to 1.0. Specifying a value of 0.0 draws the image as fully transparent while a value of 1.0 draws the image as fully opaque. Values greater than 1.0 are interpreted as 1.0.
- respectContextIsFlipped:
True if the drawing should respect the context flipped state, otherwise False.
- hints:
An optional dictionary of hints that provide more context for selecting or generating the image. See
Image Hint Dictionary Keysfor a summary of the possible key-value pairs.
Discussion
If the srcSpacePortionRect and dstSpacePortionRect rectangles have different sizes, the source portion of the image is scaled to fit the specified destination rectangle.