1 package com.bumptech.glide.load.resource.bitmap; 2 3 import android.graphics.Bitmap; 4 5 import com.bumptech.glide.load.DecodeFormat; 6 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool; 7 8 /** 9 * A bitmap decoder for a given resource type. 10 * 11 * @param <T> The type of resource this decoder can decode a {@link Bitmap} from. 12 */ 13 public interface BitmapDecoder<T> { 14 /** 15 * Returns a decoded bitmap for a given resource and target dimensions. 16 * 17 * @param resource The resource to decode, managed by the caller, no need to clean it up. 18 * @param bitmapPool A bitmap pool that can be used to reuse bitmaps during the load. Any bitmaps created or 19 * obtained from the pool other than the bitmap returned by this method should be returned to the 20 * pool. 21 * @param outWidth The target width for the returned bitmap (need not match exactly). 22 * @param outHeight The target height for the returned bitmap (need not match exactly). 23 * @param decodeFormat The desired configuration for the returned bitmap. 24 */ decode(T resource, BitmapPool bitmapPool, int outWidth, int outHeight, DecodeFormat decodeFormat)25 Bitmap decode(T resource, BitmapPool bitmapPool, int outWidth, int outHeight, DecodeFormat decodeFormat) 26 throws Exception; 27 28 /** 29 * Returns some unique String id that distinguishes this decoder from any other decoder. 30 * 31 * <p> 32 * This method can return the empty string if for all practical purposes it applies no transformations to the 33 * data while loading the resource. For {@link android.graphics.Bitmap}s this would mean at a minimum doing no 34 * downsampling and also probably always producing {@link android.graphics.Bitmap}s with 35 * {@link android.graphics.Bitmap.Config#ARGB_8888} as their config. 36 * </p> 37 */ getId()38 String getId(); 39 } 40