Composition allows you to draw a shape and blend it with the existing pixels. The canvas supports several composition modes using the globalCompositeOperation(mode)
operations. For instance:
source-over
source-in
source-out
source-atop
Let's begin with a short example demonstrating the exclusive or composition:
<<< @/docs/ch08-canvas/src/canvas/composition.qml#M1
The example below will demonstrate all composition modes by iterating over them and combining a rectangle and a circle. You can find the resulting output below the source code.
<<< @/docs/ch08-canvas/src/canvas/compositeoperation.qml#M1