把图片B(半透明)压在图片A(半透明)上面的颜色叠加算法
half4 blend_color(half4 c1, half4 c2)
{
half4 result = half4(0, 0, 0, max(c1.a, c2.a));
result.rgb = c1.rgb * (1 - c2.a) + c2.rgb * c2.a;
return result;
}
把图片B(半透明)压在图片A(半透明)上面的颜色叠加算法
half4 blend_color(half4 c1, half4 c2)
{
half4 result = half4(0, 0, 0, max(c1.a, c2.a));
result.rgb = c1.rgb * (1 - c2.a) + c2.rgb * c2.a;
return result;
}