blob: 43b519ae954cb5f1b41c8e60e563ed45d96444af [file] [log] [blame]
#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;
}
}