Use image rect information to display zoomed picture.

camera/libcameraservice/CameraService.cpp

@@ -865,7 +865,11 @@ status_t CameraService::Client::takePicture()
 }
 
 // snapshot taken
-void CameraService::Client::handleShutter()
+void CameraService::Client::handleShutter(
+    image_rect_type *size // The width and height of yuv picture for
+                          // registerBuffer. If this is NULL, use the picture
+                          // size from parameters.
+)
 {
     // Play shutter sound.
     if (mMediaPlayerClick.get() != NULL) {
@@ -889,12 +893,21 @@ void CameraService::Client::handleShutter()
     if (mSurface != 0 && !mUseOverlay) {
         int w, h;
         CameraParameters params(mHardware->getParameters());
-        params.getPictureSize(&w, &h);
         uint32_t transform = 0;
         if (params.getOrientation() == CameraParameters::CAMERA_ORIENTATION_PORTRAIT) {
             LOGV("portrait mode");
             transform = ISurface::BufferHeap::ROT_90;
         }
+
+        if (size == NULL) {
+            params.getPictureSize(&w, &h);
+        } else {
+            w = size->width;
+            h = size->height;
+            w &= ~1;
+            h &= ~1;
+            LOGD("Snapshot image width=%d, height=%d", w, h);
+        }
         ISurface::BufferHeap buffers(w, h, w, h,
             PIXEL_FORMAT_YCbCr_420_SP, transform, 0, mHardware->getRawHeap());
 
@@ -1048,7 +1061,8 @@ void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, int32_
 
     switch (msgType) {
         case CAMERA_MSG_SHUTTER:
-            client->handleShutter();
+            // ext1 is the dimension of the yuv picture.
+            client->handleShutter((image_rect_type *)ext1);
             break;
         default:
             sp<ICameraClient> c = client->mCameraClient;

camera/libcameraservice/CameraService.h

@@ -145,7 +145,7 @@ private:
         static      sp<Client>  getClientFromCookie(void* user);
 
                     void        handlePreviewData(const sp<IMemory>&);
-                    void        handleShutter();
+                    void        handleShutter(image_rect_type *image);
                     void        handlePostview(const sp<IMemory>&);
                     void        handleRawPicture(const sp<IMemory>&);
                     void        handleCompressedPicture(const sp<IMemory>&);

include/ui/CameraHardwareInterface.h

@@ -25,6 +25,15 @@
 #include <ui/Overlay.h>
 
 namespace android {
+/**
+ *  The size of image for display.
+ */
+typedef struct image_rect_struct
+{
+  uint32_t width;      /* Image width */
+  uint32_t height;     /* Image height */
+} image_rect_type;
+
 
 typedef void (*notify_callback)(int32_t msgType,
                                 int32_t ext1,