| #version 100 |
| |
| precision mediump float; |
| varying mediump vec2 vEllipseOffsets_Stage0; |
| varying mediump vec4 vEllipseRadii_Stage0; |
| varying mediump vec4 vinColor_Stage0; |
| void main() { |
| vec4 outputCoverage_Stage0; |
| { |
| vec2 scaledOffset = vEllipseOffsets_Stage0 * vEllipseRadii_Stage0.xy; |
| float test = dot(scaledOffset, scaledOffset) - 1.0; |
| vec2 grad = (2.0 * scaledOffset) * vEllipseRadii_Stage0.xy; |
| float grad_dot = dot(grad, grad); |
| grad_dot = max(grad_dot, 0.0001); |
| float invlen = inversesqrt(grad_dot); |
| float edgeAlpha = clamp(0.5 - test * invlen, 0.0, 1.0); |
| outputCoverage_Stage0 = vec4(edgeAlpha); |
| } |
| { |
| gl_FragColor = outputCoverage_Stage0; |
| } |
| } |