@flyskywhy/react-native-gcanvas/core/test/benchmarks/composite/compite_desover.js

A C++ native canvas 2D/WebGL component based on gpu opengl glsl shader GCanvas

ctx.fillStyle = "red";
ctx.fillRect(20*ratio, 140*ratio, 75*ratio, 50*ratio);
ctx.globalCompositeOperation = "destination-over";

ctx.fillStyle = "blue";
ctx.fillRect(50*ratio, 170*ratio, 75*ratio, 50*ratio);