| precision mediump float; | |
| uniform vec4 u_include; // include scissor (x_min, y_min, x_max, y_max) | |
| varying vec2 v_offset; | |
| varying vec4 v_color; | |
| void main() { | |
| vec2 include = step(u_include.xy, v_offset) * step(v_offset, u_include.zw); | |
| gl_FragColor = v_color * include.x * include.y; | |
| } |