com.bumptech.glide.load.resource.bitmap
Class BitmapTransformation
java.lang.Object
com.bumptech.glide.load.resource.bitmap.BitmapTransformation
- All Implemented Interfaces:
- Transformation<Bitmap>
- Direct Known Subclasses:
- CenterCrop, FitCenter
public abstract class BitmapTransformation
- extends Object
- implements Transformation<Bitmap>
A simple Transformation
for transforming Bitmap
s that
abstracts away dealing with Resource
objects for subclasses.
Use cases will look something like this:
public class FillSpace extends BaseBitmapTransformation {
@Override
public Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
if (toTransform.getWidth() == outWidth && toTransform.getHeight() == outHeight) {
return toTransform;
}
return Bitmap.createScaledBitmap(toTransform, outWidth, outHeight, true);
}
}
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
BitmapTransformation
public BitmapTransformation(Context context)
BitmapTransformation
public BitmapTransformation(BitmapPool bitmapPool)
transform
public final Resource<Bitmap> transform(Resource<Bitmap> resource,
int outWidth,
int outHeight)
- Description copied from interface:
Transformation
- Transforms the given resource and returns the transformed resource.
Note - If the original resource object is not returned, the original resource will be recycled and it's
internal resources may be reused. This means it is not safe to rely on the original resource or any internal
state of the original resource in any new resource that is created. Usually this shouldn't occur, but if
absolutely necessary either the original resource object can be returned with modified internal state, or
the data in the original resource can be copied into the transformed resource.
- Specified by:
transform
in interface Transformation<Bitmap>
- Parameters:
resource
- The resource to transform.outWidth
- The width of the view or target the resource will be displayed in, or
Target.SIZE_ORIGINAL
to indicate the original
resource width.outHeight
- The height of the view or target the resource will be displayed in, or
Target.SIZE_ORIGINAL
to indicate the original
resource height.
- Returns:
- The transformed resource.
transform
protected abstract Bitmap transform(BitmapPool pool,
Bitmap toTransform,
int outWidth,
int outHeight)
- Transforms the given
Bitmap
based on the given dimensions and returns the transformed
result.
outWidth and outHeight will never be Target.SIZE_ORIGINAL
, this
class converts them to be the size of the Bitmap we're going to transform before calling this method.
- Parameters:
pool
- A BitmapPool
that can be used to obtain and
return intermediate Bitmap
s used in this transformation. For every
Bitmap
obtained from the pool during this transformation, a
Bitmap
must also be returned.toTransform
- The Bitmap
to transform.outWidth
- The ideal width of the transformed bitmap (the transformed width does not need to match exactly).outHeight
- The ideal height of the transformed bitmap (the transformed heightdoes not need to match
exactly).