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Questions - core-graphics

Swift. disable antialiasing when UIBezierPath append

I'd like to append UIBezierPath without antialiasing. Here is what I tried. testView's frame is 10x10 let shadowLayer = CALayer() var path: UIBezierPath! shadowLayer.frame = testView....
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tonypeng2005

ios

swift

core-graphics

Votes: 0

Answers: 1

Latest Answer

You can create a new graphics context, set the shouldAntialias attribute to false and add the cgPath from your UIBezierPath to it. Or you can move it to draw(_:), get the current context and do the sa...
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Lalo

How to create animation inside CGContext

I have a circle and I want to make it pulsate. func drawCircle(context: CGContext) { let circle = CGRect(x: circleX, y: circleY, width: circleDiameter, height: circleDiameter) context.setFillC...
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errorka

swift

core-graphics

Votes: 0

Answers: 1

Latest Answer

Here is one way you can do it using CoreAnimation: func drawCircle(context: CGContext) { context.setFillColor(UIColor.systemPink.cgColor) context.addEllipse(in: CGRect(x: bounds.origin.x,...
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Shawn Frank

What is the most efficient way to show a live video preview with a CIFilter applied?

What is the most CPU, GPU, and energy efficient way on iOS to display a live preview of the camera and apply multiple CIFilter's to that live preview? Right now I have a solution that is basically get...
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sahandnayebaziz

swiftui

avfoundation

core-graphics

metal

cifilter

Votes: 0

Answers: 1

Latest Answer

I think this is the most effective way. Core Image (in its default config) uses Metal to perform the image filtering operations on the GPU. An MTKView is meant to be used for displaying results of a M...
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Frank Rupprecht

CGContext addPath to current path

I am confused by addPath() API of CGContextRef. The API documentation says If the source path is non-empty, then its path elements are appended in order onto the current path. The current transformati...
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Deepak Sharma

ios

uiview

uikit

core-graphics

cgcontext

Votes: 0

Answers: 1

Latest Answer

If you have already stroked (or filled) the path, there is no current path in this context. The context's current path is cleared as soon as you stroke or fill it. If I were to actually append a subp...
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matt

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