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androidresolution

Which width and height is best for 16:9 aspect ratio on VGA level?

As we know, the resolution of VGA is 640×480 and the aspect ratio is 4:3. But if I want to get the resolution about the 16:9 aspect ratio on VGA level, how to calculate it?

Is there any rule to get the right value?

Solution

  • In general, the way to figure out the aspect is like this:

    ClippedWidth = ScreenWidth
ClippedHeight = 9 * ScreenWidth / 16

    For VGA, that comes out at 640 x 360.

    If it were to come out larger than the actual screen height then you need to reverse the formula:

    ClippedWidth = 16 * ScreenHeight / 9
ClippedHeight = ScreenHeight

    Note that I have assumed you are trying to fit 16:9 data into 4:3. It's easy to go the other way. In fact, you don't even need the aspect:

    ClippedHeight = SourceHeight * ScreenWidth / SourceWidth

    or

    ClippedWidth = SourceWidth * ScreenHeight / SourceHeight

    In all cases, these calculations maintain the concept of square pixels.