| // Test whether u_textureSize is correctly set; change fragment color to green if yes. | |
| precision mediump float; | |
| uniform vec2 u_textureSize; | |
| bool areFloatsEqual(float a, float b) | |
| { | |
| const float epsilon = 0.001; | |
| return (a > (b - epsilon)) && (a < (b + epsilon)); | |
| } | |
| bool areVectorsEqual(vec2 a, vec2 b) | |
| { | |
| return areFloatsEqual(a.x, b.x) && areFloatsEqual(a.y, b.y); | |
| } | |
| void main() | |
| { | |
| gl_FragColor = areVectorsEqual(u_textureSize, vec2(100.0, 100.0)) ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0); | |
| } |