question: public static float scaleToFitTargetSize ( int [ ] dimensions , int targetWidth , int targetHeight ) { if ( dimensions . length < 2 || dimensions [ 0 ] <= 0 || dimensions [ 1 ] <= 0 ) { throw new IllegalArgumentException ( "Expected dimensions to have length >= 2 && dimensions[0] > 0 && " + "dimensions[1] > 0" ) ; } float scale = Math . max ( ( float ) targetWidth / dimensions [ 0 ] , ( float ) targetHeight / dimensions [ 1 ] ) ; dimensions [ 0 ] *= scale ; dimensions [ 1 ] *= scale ; return scale ; }
target:  Scales the provided dimension such that it is just large enough to fit the target width and height.