blob: c37000f00bd5bbc41dd46dbf884f27ebc401d283 [file] [log] [blame]
#version 100
uniform highp float u_skRTHeight;
precision mediump float;
uniform vec4 uinnerRect_Stage2;
uniform vec4 uinvRadiiLTRB_Stage2;
uniform highp sampler2D uTextureSampler_0_Stage1;
varying mediump vec4 vcolor_Stage0;
varying highp vec2 vTransformedCoords_0_Stage0;
void main() {
highp vec2 _sktmpCoord = gl_FragCoord.xy;
highp vec4 sk_FragCoord = vec4(_sktmpCoord.x, u_skRTHeight - _sktmpCoord.y, 1.0, 1.0);
vec4 outputColor_Stage0;
{
outputColor_Stage0 = vcolor_Stage0;
}
vec4 output_Stage1;
{
vec4 child;
{
child = texture2D(uTextureSampler_0_Stage1, vTransformedCoords_0_Stage0).xyzw;
}
output_Stage1 = child * outputColor_Stage0.w;
}
vec4 output_Stage2;
{
vec2 dxy0 = uinnerRect_Stage2.xy - sk_FragCoord.xy;
vec2 dxy1 = sk_FragCoord.xy - uinnerRect_Stage2.zw;
vec2 dxy = max(max(dxy0, dxy1), 0.0);
vec2 Z = max(max(dxy0 * uinvRadiiLTRB_Stage2.xy, dxy1 * uinvRadiiLTRB_Stage2.zw), 0.0);
float implicit = dot(Z, dxy) - 1.0;
float grad_dot = 4.0 * dot(Z, Z);
grad_dot = max(grad_dot, 0.0001);
float approx_dist = implicit * inversesqrt(grad_dot);
float alpha = clamp(0.5 - approx_dist, 0.0, 1.0);
output_Stage2 = vec4(alpha);
}
{
gl_FragColor = output_Stage1 * output_Stage2;
}
}