src/cobalt/renderer/glimp_shaders/glsl/fragment_skia_circle_masked_texture_domain.glsl

#version 100
precision mediump float;
uniform sampler2D uSampler0_Stage0;
uniform vec4 uTexDom_Stage0;
uniform vec3 ucircle_Stage1;
uniform float uRTHeight;
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: TextureDomain
    output_Stage0 = (vColor * texture2D(
        uSampler0_Stage0,
        clamp(vMatrixCoord_Stage0, uTexDom_Stage0.xy, uTexDom_Stage0.zw)));
  }

  vec4 output_Stage1;
  {
    // Stage 1: Circle
    float d = ucircle_Stage1.z - length(fragCoordYDown.xy - ucircle_Stage1.xy);
    d = clamp(d, 0.0, 1.0);
    output_Stage1 = (output_Stage0 * d);
  }

  gl_FragColor = output_Stage1;
}