| #version 100 |
| |
| #extension GL_OES_standard_derivatives : require |
| uniform highp float u_skRTHeight; |
| precision mediump float; |
| precision mediump sampler2D; |
| uniform mediump vec4 uColor_Stage0; |
| uniform mediump float uCoverage_Stage0; |
| uniform mediump vec3 uedges_Stage1[4]; |
| varying mediump vec4 vHairQuadEdge_Stage0; |
| void main() { |
| highp vec4 sk_FragCoord = vec4(gl_FragCoord.x, u_skRTHeight - gl_FragCoord.y, gl_FragCoord.z, gl_FragCoord.w); |
| mediump vec4 outputColor_Stage0; |
| mediump vec4 outputCoverage_Stage0; |
| { |
| outputColor_Stage0 = uColor_Stage0; |
| mediump float edgeAlpha; |
| mediump vec2 duvdx = dFdx(vHairQuadEdge_Stage0.xy); |
| mediump vec2 duvdy = -dFdy(vHairQuadEdge_Stage0.xy); |
| mediump vec2 gF = vec2((2.0 * vHairQuadEdge_Stage0.x) * duvdx.x - duvdx.y, (2.0 * vHairQuadEdge_Stage0.x) * duvdy.x - duvdy.y); |
| edgeAlpha = vHairQuadEdge_Stage0.x * vHairQuadEdge_Stage0.x - vHairQuadEdge_Stage0.y; |
| edgeAlpha = sqrt((edgeAlpha * edgeAlpha) / dot(gF, gF)); |
| edgeAlpha = max(1.0 - edgeAlpha, 0.0); |
| outputCoverage_Stage0 = vec4(uCoverage_Stage0 * edgeAlpha); |
| } |
| mediump vec4 output_Stage1; |
| { |
| mediump float alpha = 1.0; |
| mediump float edge; |
| edge = dot(uedges_Stage1[0], vec3(sk_FragCoord.x, sk_FragCoord.y, 1.0)); |
| edge = clamp(edge, 0.0, 1.0); |
| alpha *= edge; |
| edge = dot(uedges_Stage1[1], vec3(sk_FragCoord.x, sk_FragCoord.y, 1.0)); |
| edge = clamp(edge, 0.0, 1.0); |
| alpha *= edge; |
| edge = dot(uedges_Stage1[2], vec3(sk_FragCoord.x, sk_FragCoord.y, 1.0)); |
| edge = clamp(edge, 0.0, 1.0); |
| alpha *= edge; |
| edge = dot(uedges_Stage1[3], vec3(sk_FragCoord.x, sk_FragCoord.y, 1.0)); |
| edge = clamp(edge, 0.0, 1.0); |
| alpha *= edge; |
| output_Stage1 = outputCoverage_Stage0 * alpha; |
| } |
| { |
| gl_FragColor = outputColor_Stage0 * output_Stage1; |
| } |
| } |