Resize Image in Blackberry

Sometimes it is needed to resize an image.
Resizing an image to a smaller resolution may cause some distortion of the image.


Image can be programatically resize in many ways.


Approach 1
----------

private Bitmap getScaledBitmapImage(EncodedImage image, int width, int height) { // Handle null image if (image == null) { return null; } //return bestFit(image.getBitmap(), width, height); int currentWidthFixed32 = Fixed32.toFP(image.getWidth()); int currentHeightFixed32 = Fixed32.toFP(image.getHeight()); int requiredWidthFixed32 = Fixed32.toFP(width); int requiredHeightFixed32 = Fixed32.toFP(height); int scaleXFixed32 = Fixed32.div(currentWidthFixed32, requiredWidthFixed32); int scaleYFixed32 = Fixed32.div(currentHeightFixed32, requiredHeightFixed32); image = image.scaleImage32(scaleXFixed32, scaleYFixed32); return image.getBitmap(); }

Approach 2
------------

public static Bitmap resizeBitmap(Bitmap image, int width, int height) { int imageWidth = image.getWidth(); int imageHeight = image.getHeight(); // Need an array (for RGB, with the size of original image) int rgb[] = new int[imageWidth * imageHeight]; // Get the RGB array of image into "rgb" image.getARGB(rgb, 0, imageWidth, 0, 0, imageWidth, imageHeight); // Call to our function and obtain rgb2 int rgb2[] = rescaleArray(rgb, imageWidth, imageHeight, width, height); // Create an image with that RGB array Bitmap temp2 = new Bitmap(width, height); temp2.setARGB(rgb2, 0, width, 0, 0, width, height); return temp2; } private static int[] rescaleArray(int[] ini, int x, int y, int x2, int y2) { int out[] = new int[x2*y2]; for (int yy = 0; yy < y2; yy++) { int dy = yy * y / y2; for (int xx = 0; xx < x2; xx++) { int dx = xx * x / x2; out[(x2 * yy) + xx] = ini[(x * dy) + dx]; } } return out; }

Approach 3
----------

public static Bitmap bestFit(Bitmap image, int maxWidth, int maxHeight) { // getting image properties int w = image.getWidth(); int h = image.getHeight(); // get the ratio int ratiow = 100 * maxWidth / w; int ratioh = 100 * maxHeight / h; // this is to find the best ratio to // resize the image without deformations int ratio = Math.min(ratiow, ratioh); // computing final desired dimensions int desiredWidth = w * ratio / 100; int desiredHeight = h * ratio / 100; //resizing return resizeBitmap(image, desiredWidth, desiredHeight); }