float ReadRedAverage()
{
if (RenderStack.Graphics.Configuration.canUseFramebufferObject)
{
int level = 0;
int size = Texture.Size.Width;
while (size > 1)
{
size /= 2;
++level;
}
framebuffer.AttachTextureLevel(FramebufferAttachment.ColorAttachment0, level);
float[] pixels = new float[4];
float[] depths = new float[4];
GL.ReadBuffer(ReadBufferMode.ColorAttachment0);
GL.ReadPixels <float>(0, 0, 1, 1, PixelFormat.Red, PixelType.Float, pixels);
return(pixels[0]);
}
else
{
return(0.0f);
}
}