1 uniform sampler2D mrt0, mrt1, mrt2, mrt3;

2 uniform vec2 tex_scale;

3

4 void main()

5 {

6 vec2 tc = gl_TexCoord[0].st;

7

8 vec4 texel;

9 if(tc.x < 0.25) {

10 texel = texture2D(mrt0, tc * vec2(4.0, 1.0) * tex_scale);

11 } else if(tc.x < 0.5) {

12 texel = texture2D(mrt1, (tc - vec2(0.25, 0.0)) * vec2(4.0, 1.0) * tex_scale);

13 } else if(tc.x < 0.75) {

14 texel = texture2D(mrt2, (tc - vec2(0.5, 0.0)) * vec2(4.0, 1.0) * tex_scale);

15 } else {

16 texel = texture2D(mrt3, (tc - vec2(0.75, 0.0)) * vec2(4.0, 1.0) * tex_scale);

17 }

18

19 gl_FragColor = texel;

20 }