I came across a strange phenomena when I was using gDEBugger.
I opened a texture with the gDEBugger viewer. Under the data view, there is a texel value like this:
each component stands for RGBA, respectively.
However, after I ticked ‘Show values normalized to [0..255] range’, the values changed to
in which the red component exceeded the green and blue components. Then I switched to the image view, also found that the corresponding pixel is red. Really confusing!