1 attribute mediump vec2 aPosition;
2 varying mediump vec2 vTexCoord;
3 uniform highp mat4 uMvpMatrix;
4 uniform highp vec3 uSize;
5 varying mediump vec2 sTexCoordRect;
9 gl_Position = uMvpMatrix * vec4(aPosition * uSize.xy, 0.0, 1.0);
10 vTexCoord = aPosition + vec2(0.5);