Offscreen drawing on the other hand refers to the process of generating bitmap graphics in the background using the CPU before handing them off to the GPU for onscreen rendering. Green is for whenever an offscreen buffer is reused, while red is for when it had to be re-created. Be sure to also check Color Hits Green and Misses Red. Instruments’ Core Animation Tool has an option called Color Offscreen-Rendered Yellow that will color regions yellow that have been rendered with an offscreen buffer (this option is also available in the Simulator’s Debug menu). Use mask layer instead of rnerRadius to avoid blending, but mask causes offscreen renderingīyRoundingCorners: ,ĬornerRadii: CGSize(width: 20, height: 20) rnerRadius, with or without layer.maskedCorners causes blending If a value for the mask property is also specified, the two masks are multiplied to get the final mask value. When the value of this property is true, Core Animation creates an implicit clipping mask that matches the bounds of the layer and includes any corner radius effects. However, setting the masksToBounds property to true causes the content to be clipped to the rounded corners. By default, the corner radius does not apply to the image in the layer’s contents property it applies only to the background color and border of the layer. Setting the radius to a value greater than 0.0 causes the layer to begin drawing rounded corners on its background. Using a bitmap is WAY heavier in terms of memory and performance.

cornerRadius was deliberately improved in Metal so it could be used everywhere.Talked to a Core Animation engineer again: On Simulator -> Debug -> Color Blended Layer Corner radius # Run on device, Xcode -> Debug -> View debugging -> Rendering -> Color blended layer

Corner radius for one corner ios