1// Multi-texture fragment shader
2// Brian Paul
3
4// Composite second texture over first.
5// We're assuming the 2nd texture has a meaningful alpha channel.
6
7uniform sampler2D tex1;
8uniform sampler2D tex2;
9
10void main()
11{
12   vec4 t1 = texture2D(tex1, gl_Color.xy);
13   vec4 t2 = texture2D(tex2, gl_Color.yz);
14   gl_FragColor = mix(t1, t2, t2.w);
15}
16