OpenGL image viewer, need some help on implementation

[wysota]

We talk about HDR images, which pixel is represented with 16 bit float, 32 bit float or 32 bit integer. QPixmap doesn't support this kind of format.

Does your screen support it? Because if not, there is no point in doing something which you'll never see.

Also, he can use shaders for image processing.

And probe texels for colours when he wants to check the pixel value?

Using shaders would make sense if he had 100 images per second to process, but not with an image viewer. At least that's my point of view.