protected Bitmap downsampleWithSize(
RecyclableBufferedInputStream bis,
BitmapFactory.Options options,
BitmapPool pool,
int inWidth,
int inHeight,
int sampleSize) {
if (sampleSize > 1) {
options.inSampleSize = sampleSize;
} else {
setInBitmap(options, pool.get(inWidth, inHeight, getConfig(bis)));
}
return decodeStream(bis, options);
}
/**
* Load the image for the given InputStream. If a recycled Bitmap whose dimensions exactly match
* those of the image for the given InputStream is available, the operation is much less expensive
* in terms of memory.
*
* <p>Note - this method will throw an exception of a Bitmap with dimensions not matching those of
* the image for the given InputStream is provided.
*
* @param bis An InputStream to the data for the image
* @param options The options to pass to {@link BitmapFactory#decodeStream(java.io.InputStream,
* android.graphics.Rect, android.graphics.BitmapFactory.Options)}
* @param pool A pool of recycled bitmaps
* @param outWidth The width the final image should be close to
* @param outHeight The height the final image should be close to
* @return A new bitmap containing the image from the given InputStream, or recycle if recycle is
* not null
*/
public Bitmap downsample(
RecyclableBufferedInputStream bis,
BitmapFactory.Options options,
BitmapPool pool,
int outWidth,
int outHeight) {
bis.mark(MARK_POSITION);
int orientation = 0;
try {
orientation = new ImageHeaderParser(bis).getOrientation();
} catch (IOException e) {
e.printStackTrace();
}
try {
bis.reset();
} catch (IOException e) {
e.printStackTrace();
}
final int[] inDimens = getDimensions(bis, options);
final int inWidth = inDimens[0];
final int inHeight = inDimens[1];
final int degreesToRotate = ImageResizer.getExifOrientationDegrees(orientation);
final int sampleSize;
if (degreesToRotate == 90 || degreesToRotate == 270) {
// if we're rotating the image +-90 degrees, we need to downsample accordingly so the image
// width is
// decreased to near our target's height and the image height is decreased to near our target
// width
sampleSize = getSampleSize(inHeight, inWidth, outWidth, outHeight);
} else {
sampleSize = getSampleSize(inWidth, inHeight, outWidth, outHeight);
}
final Bitmap downsampled =
downsampleWithSize(bis, options, pool, inWidth, inHeight, sampleSize);
final Bitmap rotated = ImageResizer.rotateImageExif(downsampled, pool, orientation);
if (downsampled != rotated) {
pool.put(downsampled);
}
return rotated;
}