@flyskywhy/react-native-gcanvas/core/test/benchmarks/stroke/tc_2d_stroke_alpha.js

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

ctx.strokeStyle = 'rgba(255,0,0,0.5)';
ctx.lineWidth = 5*ratio;
ctx.strokeRect(10*ratio, 10*ratio, 100*ratio, 100*ratio);