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      1 package org.robolectric.shadows;
      2 
      3 import static android.os.Build.VERSION_CODES.LOLLIPOP;
      4 import static org.robolectric.RuntimeEnvironment.getApiLevel;
      5 import static org.robolectric.Shadows.shadowOf;
      6 
      7 import android.graphics.Bitmap;
      8 import android.graphics.BitmapFactory;
      9 import android.graphics.BitmapRegionDecoder;
     10 import android.graphics.Point;
     11 import android.graphics.Rect;
     12 import java.io.ByteArrayInputStream;
     13 import java.io.FileDescriptor;
     14 import java.io.FileInputStream;
     15 import java.io.IOException;
     16 import java.io.InputStream;
     17 import org.robolectric.annotation.Implementation;
     18 import org.robolectric.annotation.Implements;
     19 import org.robolectric.util.ReflectionHelpers;
     20 
     21 @Implements(BitmapRegionDecoder.class)
     22 public class ShadowBitmapRegionDecoder {
     23   private int width;
     24   private int height;
     25 
     26   @Implementation
     27   public static BitmapRegionDecoder newInstance(byte[] data, int offset, int length, boolean isShareable) throws IOException {
     28     return fillWidthAndHeight(newInstance(), new ByteArrayInputStream(data));
     29   }
     30 
     31   @Implementation
     32   public static BitmapRegionDecoder newInstance(FileDescriptor fd, boolean isShareable) throws IOException {
     33     return fillWidthAndHeight(newInstance(), new FileInputStream(fd));
     34   }
     35 
     36   @Implementation
     37   public static BitmapRegionDecoder newInstance(InputStream is, boolean isShareable) throws IOException {
     38     return fillWidthAndHeight(newInstance(), is);
     39   }
     40 
     41   @Implementation
     42   public static BitmapRegionDecoder newInstance(String pathName, boolean isShareable) throws IOException {
     43     return fillWidthAndHeight(newInstance(), new FileInputStream(pathName));
     44   }
     45 
     46   private static BitmapRegionDecoder fillWidthAndHeight(BitmapRegionDecoder bitmapRegionDecoder, InputStream is) {
     47     ShadowBitmapRegionDecoder shadowDecoder = shadowOf(bitmapRegionDecoder);
     48     Point imageSize = ImageUtil.getImageSizeFromStream(is);
     49     if (imageSize != null) {
     50       shadowDecoder.width = imageSize.x;
     51       shadowDecoder.height = imageSize.y;
     52     }
     53     return bitmapRegionDecoder;
     54   }
     55 
     56   @Implementation
     57   public int getWidth() {
     58     return width;
     59   }
     60 
     61   @Implementation
     62   public int getHeight() {
     63     return height;
     64   }
     65 
     66   @Implementation
     67   public Bitmap decodeRegion(Rect rect, BitmapFactory.Options options) {
     68     return Bitmap.createBitmap(rect.width(), rect.height(),
     69         options.inPreferredConfig != null ? options.inPreferredConfig : Bitmap.Config.ARGB_8888);
     70   }
     71 
     72   private static BitmapRegionDecoder newInstance() {
     73     if (getApiLevel() >= LOLLIPOP) {
     74       return ReflectionHelpers.callConstructor(BitmapRegionDecoder.class,
     75           new ReflectionHelpers.ClassParameter<>(long.class, 0L));
     76     } else {
     77       return ReflectionHelpers.callConstructor(BitmapRegionDecoder.class,
     78           new ReflectionHelpers.ClassParameter<>(int.class, 0));
     79     }
     80   }
     81 }
     82