@flyskywhy/react-native-gcanvas/core/test/benchmarks/shaow/tc_2d_shadow_alpha.js

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

ctx.translate(100, 100);

ctx.fillStyle = "rgba(0, 0, 255, 0.5)";
ctx.shadowColor = "rgba(0, 0, 0, 0.2)";
ctx.shadowBlur = 20;
ctx.shadowOffsetX = 20;
ctx.shadowOffsetY = 20;
ctx.fillRect(10, 10, 100, 100);