PhotupBitmapOptionsFactory.java

PhotupBitmapOptionsFactory.java

public class PhotupBitmapOptionsFactory implements BitmapOptionsFactory {

    private static int MAX_DIMEN = 512;

    @Override
    public Options newOptionsFromStream(InputStream inputStream, int width, int height) {
        BitmapFactory.Options bitmapFactoryOptions = new BitmapFactory.Options();

        final int maxDim;
        if (height > 0 && width > 0) {
            maxDim = Math.max(height, width);
        } else {
            maxDim = MAX_DIMEN;
        }

        bitmapFactoryOptions.inJustDecodeBounds = true;
        try {
            BitmapFactory.decodeStream(inputStream, null, bitmapFactoryOptions);
        } catch (SecurityException ignore) {}

        final int origWidth = bitmapFactoryOptions.outWidth;
        final int origHeight = bitmapFactoryOptions.outHeight;

        bitmapFactoryOptions.inJustDecodeBounds = false;
        bitmapFactoryOptions.inScaled = false;
        bitmapFactoryOptions.inPurgeable = true;
        bitmapFactoryOptions.inInputShareable = true;
        bitmapFactoryOptions.inDither = true;
        bitmapFactoryOptions.inPreferredConfig = Bitmap.Config.RGB_565;

        if (origWidth > maxDim || origHeight > maxDim) {
            int k = 1;
            int tmpHeight = origHeight, tmpWidth = origWidth;
            while ((tmpWidth / 2) >= maxDim || (tmpHeight / 2) >= maxDim) {
                tmpWidth /= 2;
                tmpHeight /= 2;
                k *= 2;
            }
            bitmapFactoryOptions.inSampleSize = k;
        }

        return bitmapFactoryOptions;
    }
}