VoiceCamera.CameraFragment.ConfigureTransform C# (CSharp) Метод

        private void ConfigureTransform(int viewWidth, int viewHeight)
        {
            Activity activity = Activity;
            if (mTextureView == null || mPreviewSize == null || activity == null) {
                return;
            }

            SurfaceOrientation rotation = activity.WindowManager.DefaultDisplay.Rotation;
            Matrix matrix = new Matrix ();
            RectF viewRect = new RectF (0, 0, viewWidth, viewHeight);
            RectF bufferRect = new RectF (0, 0, mPreviewSize.Width, mPreviewSize.Height);
            float centerX = viewRect.CenterX();
            float centerY = viewRect.CenterY();
            if (rotation == SurfaceOrientation.Rotation90 || rotation == SurfaceOrientation.Rotation270) {
                bufferRect.Offset (centerX - bufferRect.CenterX(), centerY - bufferRect.CenterY());
                matrix.SetRectToRect (viewRect, bufferRect, Matrix.ScaleToFit.Fill);
                float scale = System.Math.Max ((float)viewHeight / mPreviewSize.Height, (float)viewWidth / mPreviewSize.Width);
                matrix.PostScale (scale, scale, centerX, centerY);
                matrix.PostRotate (90 * ((int)rotation - 2), centerX, centerY);
            }
            mTextureView.SetTransform (matrix);
        }

 public void OnSurfaceTextureAvailable(Android.Graphics.SurfaceTexture surface, int width, int height)
 {
     Fragment.ConfigureTransform(width, height);
     Fragment.StartPreview();
 }