Change camera switch animation to always zoom in.

bug:5954954

Change-Id: Ie2c2bc0c3c25a63dd0fc4b5f162b2ceff76475da

4 files changed, 9 insertions, 47 deletions

diff --git a/src/com/android/camera/Camera.java b/src/com/android/camera/Camera.java
index e8a56a73..a5e4a77c 100644
--- a/src/com/android/camera/Camera.java
+++ b/src/com/android/camera/Camera.java
@@ -2263,7 +2263,7 @@ public class Camera extends ActivityBase implements FocusManager.Listener,
 
         // Start switch camera animation.
         mCameraDevice.waitForIdle(); // Wait until startPreview finishes.
-        mCameraScreenNail.animateSwitchCamera(mirror);
+        mCameraScreenNail.animateSwitchCamera();
     }
 
     // Preview texture has been copied. Now camera can be released and the
diff --git a/src/com/android/camera/CameraScreenNail.java b/src/com/android/camera/CameraScreenNail.java
index ed7c8477..bf3deb2f 100644
--- a/src/com/android/camera/CameraScreenNail.java
+++ b/src/com/android/camera/CameraScreenNail.java
@@ -98,10 +98,9 @@ public class CameraScreenNail extends SurfaceTextureScreenNail {
         }
     }
 
-    public void animateSwitchCamera(boolean backToFront) {
+    public void animateSwitchCamera() {
         synchronized (mLock) {
             if (mAnimState == ANIM_SWITCH_DARK_PREVIEW) {
-                mSwitchAnimManager.setSwitchDirection(backToFront);
                 // Do not request render here because camera has been just
                 // started. We do not want to draw black frames.
                 mAnimState = ANIM_SWITCH_WAITING_FIRST_FRAME;
diff --git a/src/com/android/camera/SwitchAnimManager.java b/src/com/android/camera/SwitchAnimManager.java
index fa5d2584..36da7a8f 100644
--- a/src/com/android/camera/SwitchAnimManager.java
+++ b/src/com/android/camera/SwitchAnimManager.java
@@ -23,21 +23,14 @@ import com.android.gallery3d.ui.RawTexture;
 
 /**
  * Class to handle the animation when switching between back and front cameras.
- * The transition is like from Homescreen to AllApps, where front camera is
- * AllApps, and back camera is Homescreen. This is because the back camera is
- * positioned on the phone underneath the front camera.
- *
- * From back-camera to front camera:
- * - Back camera zooms-out and fades out; Front camera zooms-out and fades-in.
- *
- * From front camera to back camera:
- * - Front camera zooms-in and fades out; Back camera zooms-in and fades-in.
+ * The snapshot of the previous camera zooms in and fades out. The preview of
+ * the new camera zooms in and fades in.
  */
 public class SwitchAnimManager {
     private static final String TAG = "SwitchAnimManager";
     // The amount of change for zooming in and out.
-    private static final float ZOOM_DELTA_FRONT_CAMERA = 0.5f;
-    private static final float ZOOM_DELTA_BACK_CAMERA = 0.2f;
+    private static final float ZOOM_DELTA_PREVIEW = 0.2f;
+    private static final float ZOOM_DELTA_REVIEW = 0.5f;
     private static final float ANIMATION_DURATION = 400;  // ms
     public static final float INITIAL_DARKEN_ALPHA = 0.8f;
 
@@ -47,16 +40,10 @@ public class SwitchAnimManager {
     private float mCenterY;
     private int mDrawWidth;
     private int mDrawHeight;
-    // True if switching from back camera to front camera. False otherwise.
-    private boolean mBackToFront;
 
     public SwitchAnimManager() {
     }
 
-    public void setSwitchDirection(boolean backToFront) {
-        mBackToFront = backToFront;
-    }
-
     // x, y, x and h: the rectangle area where the animation takes place.
     public void startAnimation(int x, int y, int w, int h) {
         mAnimStartTime = SystemClock.uptimeMillis();
@@ -76,8 +63,8 @@ public class SwitchAnimManager {
 
         // Calculate the position and the size of the preview and review.
         float fraction = timeDiff / ANIMATION_DURATION;
-        float previewScale = calculatePreviewScale(fraction, mBackToFront);
-        float reviewScale = calculateReviewScale(fraction, mBackToFront);
+        float previewScale = 1 - ZOOM_DELTA_PREVIEW * (1 - fraction);
+        float reviewScale = 1 + ZOOM_DELTA_REVIEW * fraction;
         float previewWidth = mDrawWidth * previewScale;
         float previewHeight = mDrawHeight * previewScale;
         float reviewWidth = mDrawWidth * reviewScale;
@@ -100,26 +87,4 @@ public class SwitchAnimManager {
         canvas.setAlpha(alpha);
         return true;
     }
-
-    // Calculate the zoom factor of preview based on the given time fraction.
-    private float calculatePreviewScale(float fraction, boolean backToFront) {
-        if (backToFront) {
-            // Front camera zooms out.
-            return 1 + ZOOM_DELTA_FRONT_CAMERA * (1 - fraction);
-        } else {
-            // Back camera zooms in.
-            return 1 - ZOOM_DELTA_BACK_CAMERA * (1 - fraction);
-        }
-    }
-
-    // Calculate the zoom factor of review based on the given time fraction.
-    private float calculateReviewScale(float fraction, boolean backToFront) {
-        if (backToFront) {
-            // Back camera zooms out.
-            return 1 - ZOOM_DELTA_BACK_CAMERA * fraction;
-        } else {
-            // Front camera zooms in.
-            return 1 + ZOOM_DELTA_FRONT_CAMERA * fraction;
-        }
-    }
 }
diff --git a/src/com/android/camera/VideoCamera.java b/src/com/android/camera/VideoCamera.java
index 758c78d2..1b6b29bf 100755
--- a/src/com/android/camera/VideoCamera.java
+++ b/src/com/android/camera/VideoCamera.java
@@ -2158,9 +2158,7 @@ public class VideoCamera extends ActivityBase
 
         // Start switch camera animation.
         mCameraDevice.waitForIdle(); // Wait until startPreview finishes.
-        CameraInfo info = CameraHolder.instance().getCameraInfo()[mCameraId];
-        boolean backToFront = (info.facing == CameraInfo.CAMERA_FACING_FRONT);
-        mCameraScreenNail.animateSwitchCamera(backToFront);
+        mCameraScreenNail.animateSwitchCamera();
 
         // Enable all camera controls.
         mSwitchingCamera = false;