But if you use OpenGL + C++ language for your game probably you'll need to calculate scaling depending on the device.

Or just set up an appropriate matrix with the resolution you want to handle (and the GPU will take care of everything else).

But if you use OpenGL + C++ language for your game probably you'll need to calculate scaling depending on the device.

Or just take advantage that the coordinates range from -1.0 to 1.0 and just set up an appropriate matrix with the resolution you want to handle (and the GPU will take care of everything else).