Increase ROI size to 1/8 of the image width

Bug: 10863323
Change-Id: I962afbb0b49a6902fac0bbd5209b52591604ed20

1 files changed, 10 insertions, 4 deletions

diff --git a/src/com/android/camera/FocusOverlayManager.java b/src/com/android/camera/FocusOverlayManager.java
index a41959b08..d9addac48 100644
--- a/src/com/android/camera/FocusOverlayManager.java
+++ b/src/com/android/camera/FocusOverlayManager.java
@@ -513,15 +513,21 @@ public class FocusOverlayManager {
     }
 
     private void calculateTapArea(int x, int y, float areaMultiple, Rect rect) {
-        int areaSize = (int) (Math.min(mPreviewWidth, mPreviewHeight) * areaMultiple / 20);
-        int left = CameraUtil.clamp(x - areaSize, 0, mPreviewWidth - 2 * areaSize);
-        int top = CameraUtil.clamp(y - areaSize, 0, mPreviewHeight - 2 * areaSize);
+        int areaSize = (int) (getAreaSize() * areaMultiple);
+        int left = CameraUtil.clamp(x - areaSize / 2, 0, mPreviewWidth - areaSize);
+        int top = CameraUtil.clamp(y - areaSize / 2, 0, mPreviewHeight - areaSize);
 
-        RectF rectF = new RectF(left, top, left + 2 * areaSize, top + 2 * areaSize);
+        RectF rectF = new RectF(left, top, left + areaSize, top + areaSize);
         mMatrix.mapRect(rectF);
         CameraUtil.rectFToRect(rectF, rect);
     }
 
+    private int getAreaSize() {
+        // Recommended focus area size from the manufacture is 1/8 of the image
+        // width
+        return Math.min(mPreviewWidth, mPreviewHeight) / 8;
+    }
+
     /* package */ int getFocusState() {
         return mState;
     }