#version 100 | |
precision mediump float; | |
uniform vec4 uinnerRect_Stage1; | |
uniform float uradiusPlusHalf_Stage1; | |
uniform float uRTHeight; | |
varying vec4 vColor; | |
varying vec4 vCircleEdge_Stage0; | |
void main() | |
{ | |
vec4 fragCoordYDown = vec4(gl_FragCoord.x, uRTHeight - gl_FragCoord.y, 1.0, 1.0); | |
vec4 output_Stage0; | |
{ | |
// Stage 0: CircleEdge | |
float d = length(vCircleEdge_Stage0.xy); | |
float edgeAlpha = clamp(vCircleEdge_Stage0.z - d, 0.0, 1.0); | |
output_Stage0 = vec4(edgeAlpha); | |
} | |
vec4 output_Stage1; | |
{ | |
// Stage 1: CircularRRect | |
vec2 dxy0 = uinnerRect_Stage1.xy - fragCoordYDown.xy; | |
vec2 dxy1 = fragCoordYDown.xy - uinnerRect_Stage1.zw; | |
vec2 dxy = max(max(dxy0, dxy1), 0.0); | |
float alpha = clamp(uradiusPlusHalf_Stage1 - length(dxy), 0.0, 1.0); | |
alpha = 1.0 - alpha; | |
output_Stage1 = (output_Stage0 * alpha); | |
} | |
gl_FragColor = (vColor * output_Stage1); | |
} |