@flyskywhy/react-native-gcanvas/core/test/benchmarks/shaow/tc_2d_shadow.js

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

ctx.fillStyle = "blue";
ctx.shadowColor = "black";
ctx.shadowBlur = 20*ratio;
ctx.shadowOffsetX = 20*ratio;
ctx.shadowOffsetY = 20*ratio;
ctx.fillRect(10*ratio, 10*ratio, 100*ratio, 100*ratio);