Downsampler preserves original size for Target.SIZE_ORIGINAL for all downsample strategies.

PiperOrigin-RevId: 269628399

Author: sjudd

instrumentation/src/androidTest/java/com/bumptech/glide/load/resource/bitmap/DownsamplerEmulatorTest.java

@@ -28,6 +28,7 @@
 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPoolAdapter;
 import com.bumptech.glide.load.engine.bitmap_recycle.LruArrayPool;
+import com.bumptech.glide.request.target.Target;
 import com.bumptech.glide.util.Preconditions;
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -121,6 +122,9 @@ public void calculateScaling_withAtMost() throws IOException {
         .givenSquareImageWithDimensionOf(200, onAllApisAndAllFormatsExpect(200, 200))
         .givenSquareImageWithDimensionOf(450, onAllApisAndAllFormatsExpect(450, 450))
         .givenImageWithDimensionsOf(200, 450, onAllApisAndAllFormatsExpect(200, 450))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 
@@ -144,6 +148,9 @@ public void calculateScaling_withAtLeast() throws IOException {
         .givenSquareImageWithDimensionOf(200, onAllApisAndAllFormatsExpect(200, 200))
         .givenSquareImageWithDimensionOf(450, onAllApisAndAllFormatsExpect(450, 450))
         .givenImageWithDimensionsOf(200, 450, onAllApisAndAllFormatsExpect(200, 450))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 
@@ -207,6 +214,9 @@ public void calculateScaling_withCenterInside() throws IOException {
         .givenSquareImageWithDimensionOf(200, onAllApisAndAllFormatsExpect(200, 200))
         .givenSquareImageWithDimensionOf(450, onAllApisAndAllFormatsExpect(450, 450))
         .givenImageWithDimensionsOf(200, 450, onAllApisAndAllFormatsExpect(200, 450))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 
@@ -253,6 +263,9 @@ public void calculateScaling_withCenterOutside() throws IOException {
             450,
             atAndAbove(KITKAT).with(allFormats().expect(500, 1125)),
             below(KITKAT).with(allFormats().expect(200, 450)))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 
@@ -276,6 +289,9 @@ public void calculateScaling_withNone() throws IOException {
         .givenSquareImageWithDimensionOf(200, onAllApisAndAllFormatsExpect(200, 200))
         .givenSquareImageWithDimensionOf(450, onAllApisAndAllFormatsExpect(450, 450))
         .givenImageWithDimensionsOf(200, 450, onAllApisAndAllFormatsExpect(200, 450))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 
@@ -386,6 +402,9 @@ public void calculateScaling_withFitCenter() throws IOException {
             450,
             atAndAbove(KITKAT).with(allFormats().expect(222, 500)),
             below(KITKAT).with(allFormats().expect(200, 450)))
+        // Original scaling
+        .setTargetDimensions(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
+        .givenImageWithDimensionsOf(1821, 2634, onAllApisAndAllFormatsExpect(1821, 2634))
         .run();
   }
 

library/src/main/java/com/bumptech/glide/load/resource/bitmap/Downsampler.java

@@ -270,8 +270,14 @@ private Bitmap decodeFromWrappedStreams(
     int degreesToRotate = TransformationUtils.getExifOrientationDegrees(orientation);
     boolean isExifOrientationRequired = TransformationUtils.isExifOrientationRequired(orientation);
 
-    int targetWidth = requestedWidth == Target.SIZE_ORIGINAL ? sourceWidth : requestedWidth;
-    int targetHeight = requestedHeight == Target.SIZE_ORIGINAL ? sourceHeight : requestedHeight;
+    int targetWidth =
+        requestedWidth == Target.SIZE_ORIGINAL
+            ? (isRotationRequired(degreesToRotate) ? sourceHeight : sourceWidth)
+            : requestedWidth;
+    int targetHeight =
+        requestedHeight == Target.SIZE_ORIGINAL
+            ? (isRotationRequired(degreesToRotate) ? sourceWidth : sourceHeight)
+            : requestedHeight;
 
     ImageType imageType = ImageHeaderParserUtils.getType(parsers, is, byteArrayPool);
 
@@ -422,7 +428,7 @@ private static void calculateScaling(
     // width is decreased to near our target's height and the image height is decreased to near
     // our target width.
     //noinspection SuspiciousNameCombination
-    if (degreesToRotate == 90 || degreesToRotate == 270) {
+    if (isRotationRequired(degreesToRotate)) {
       orientedSourceWidth = sourceHeight;
       orientedSourceHeight = sourceWidth;
     }
@@ -906,4 +912,8 @@ public interface DecodeCallbacks {
 
     void onDecodeComplete(BitmapPool bitmapPool, Bitmap downsampled) throws IOException;
   }
+
+  private static boolean isRotationRequired(int degreesToRotate) {
+    return degreesToRotate == 90 || degreesToRotate == 270;
+  }
 }