android AGSL

Android Graphics Shading Language (AGSL) 为Android 13 引入的新特性，本文对其使用做一个

简单的介绍。

AGSL的一种用法是结合Paint使用：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new MyView(this));
    }

    private static class MyView extends View {
        private static final String SHADER_SRC =
                "half4 main(float2 fragCoord) {\n" +
                        "return half4(1,0,0,1);\n" +
                        "}";
        RuntimeShader mShader = new RuntimeShader(SHADER_SRC);

        private Paint mPaint = new Paint();

        public MyView(Context context){
            super(context);
            mPaint.setShader(mShader);
        }

        @Override
        protected void onDraw