@flyskywhy/react-native-gcanvas/core/test/benchmarks/shaow/tc_2d_shadowOffsetX.js

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

// Shadow
ctx.shadowColor = 'red';
ctx.shadowOffsetX = 25 *ratio;
ctx.shadowBlur =10 *ratio;

// Rectangle
ctx.fillStyle = 'blue';
ctx.fillRect(20 *ratio, 20 *ratio,150 *ratio,100 *ratio);