Bitmap scaled Width And Height To Maximum - Android Graphics

Android examples for Graphics:Bitmap Scale

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Description

Bitmap scaled Width And Height To Maximum

Demo Code


//package com.java2s;

public class Main {
    public static int[] scaledWidthAndHeightToMaximum(int width,
            int height, int maxWidth, int maxHeight) {
        int[] output = new int[2];
        getScaledWidthAndHeightToMaximum(width, height, maxWidth,
                maxHeight, output);/*w ww.j  a  v  a 2  s .co  m*/
        return output;
    }

    /** Given a width and height, fills output array with scaled width and height values 
     * such that one of the values is exactly equal to the given maximum width or height, 
     * and the other value is less than or equal to the maximum.
     */
    public static void getScaledWidthAndHeightToMaximum(int width,
            int height, int maxWidth, int maxHeight, int[] output) {
        output[0] = width;
        output[1] = height;
        // common cases: if one dimension fits exactly and the other is smaller, return unmodified
        if (width == maxWidth && height <= maxHeight)
            return;
        if (height == maxHeight && width <= maxWidth)
            return;
        float wratio = ((float) width) / maxWidth;
        float hratio = ((float) height) / maxHeight;
        if (wratio <= hratio) {
            // scale to full height, partial width
            output[0] = (int) (width / hratio);
            output[1] = maxHeight;
        } else {
            // scale to full width, partial height
            output[0] = maxWidth;
            output[1] = (int) (height / wratio);
        }
    }
}

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