source/blender/draw/engines/overlay/shaders/armature_shape_solid_frag.glsl


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uniform float alpha = 0.6;

in vec4 finalColor;
flat in int inverted;

layout(location = 0) out vec4 fragColor;
layout(location = 1) out vec4 lineOutput;

void main()
{
  /* Manual backface cullling.. Not ideal for performance
   * but needed for view clarity in xray mode and support
   * for inverted bone matrices. */
  if ((inverted == 1) == gl_FrontFacing) {
    discard;
  }
  fragColor = vec4(finalColor.rgb, alpha);
  lineOutput = vec4(0.0);
}