コード例 #1
0
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    Log.d(TAG, "surfaceChanged");

    if (mHolder.getSurface() == null) {
      Log.e(TAG, "Error: preview surface does not exist");
      return;
    }

    // preview_width = width;
    // preview_height = height;

    mPreviewWidth = mCameraManager.getPreviewSize().x;
    mPreviewHeight = mCameraManager.getPreviewSize().y;

    mCameraManager.stopPreview();
    mCameraManager.getCamera().setPreviewCallback(this);
    mCameraManager.getCamera().setDisplayOrientation(90); // Portrait mode

    mCameraManager.startPreview();
  }
コード例 #2
0
  /**
   * Transform result to surfaceView coordinates
   *
   * <p>This method is needed because coordinates are given in landscape camera coordinates. Now is
   * working but transform operations aren't very explained
   *
   * <p>TODO re-write this method explaining each single value
   *
   * @return a new PointF array with transformed points
   */
  private PointF[] transformToViewCoordinates(ResultPoint[] resultPoints) {

    PointF[] transformedPoints = new PointF[resultPoints.length];
    int index = 0;
    if (resultPoints != null) {
      float previewX = mCameraManager.getPreviewSize().x;
      float previewY = mCameraManager.getPreviewSize().y;
      float scaleX = this.getWidth() / previewY;
      float scaleY = this.getHeight() / previewX;

      for (ResultPoint point : resultPoints) {
        PointF tmppoint = new PointF((previewY - point.getY()) * scaleX, point.getX() * scaleY);
        transformedPoints[index] = tmppoint;
        index++;
      }
    }
    return transformedPoints;
  }