​

varying vec2 vTexCoord;

​

uniform sampler2D u_texture;

uniform sampler2D u_sourceTexture;

​

void main() {

  vec2 texCoord = vec2(vTexCoord.x, 1.0 - vTexCoord.y);

  vec4 sourceColor = texture2D(u_sourceTexture, texCoord);

  vec4 color = texture2D(u_texture, texCoord);

  //gl_FragColor = color;

  gl_FragColor = sourceColor;

  gl_FragColor.a = color.a * 0.997;

}