blob: b2f111128aaf09d49a9a5a3e3705bf079e896893 [file] [log] [blame]
#version 100
precision mediump float;
uniform sampler2D uSampler0_Stage0;
uniform vec4 uinnerRect_Stage1;
uniform float uRTHeight;
uniform vec2 uinvRadiiXY_Stage1;
varying vec4 vColor;
varying vec2 vMatrixCoord_Stage0;
void main()
{
vec4 fragCoordYDown = vec4(gl_FragCoord.x, uRTHeight - gl_FragCoord.y, 1.0, 1.0);
vec4 output_Stage0;
{
// Stage 0: Texture
output_Stage0 = (vColor * texture2D(uSampler0_Stage0, vMatrixCoord_Stage0));
}
vec4 output_Stage1;
{
// Stage 1: EllipticalRRect
vec2 dxy0 = uinnerRect_Stage1.xy - fragCoordYDown.xy;
vec2 dxy1 = fragCoordYDown.xy - uinnerRect_Stage1.zw;
vec2 dxy = max(max(dxy0, dxy1), 0.0);
vec2 Z = dxy * uinvRadiiXY_Stage1;
float implicit = dot(Z, dxy) - 1.0;
float grad_dot = 4.0 * dot(Z, Z);
grad_dot = max(grad_dot, 1.0e-4);
float approx_dist = implicit * inversesqrt(grad_dot);
float alpha = clamp(0.5 + approx_dist, 0.0, 1.0);
output_Stage1 = (output_Stage0 * alpha);
}
gl_FragColor = output_Stage1;
}