glbench/yuv2rgb_2.glslv

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uniform float imageHeight;

attribute vec4 c;

varying vec2 lineCounter;
varying vec2 yPlane;
varying vec2 uPlane;
varying vec2 vPlane;

void main() {
  gl_Position = vec4(2.0 * c.x - 1.0, 2.0 * c.y - 1.0, 0.0, 1.0);
  lineCounter = vec2(c.y * imageHeight / 4.0, 0.0);
  yPlane = vec2(c.x, 1. - (2.0 * c.y + 1.0) / 3.0);
  uPlane = vec2(c.x / 2.0, 1. - (c.y + 1.0) / 6.0);
  vPlane = vec2(c.x / 2.0, 1. - c.y / 6.0);
}