Add Transform section to viewer tools window.

This adds sliders for Zoom and Rotate.

Change-Id: Ie568e5381d76bd5a457760e2d6224e42e64c7f16
Reviewed-on: https://skia-review.googlesource.com/123027
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/viewer/Viewer.h b/tools/viewer/Viewer.h
index 760e3b8520..25cbed656c 100644
--- a/tools/viewer/Viewer.h
+++ b/tools/viewer/Viewer.h
@@ -100,6 +100,7 @@ private:
     void drawImGui();
 
     void changeZoomLevel(float delta);
+    void preTouchMatrixChanged();
     SkMatrix computePreTouchMatrix();
     SkMatrix computeMatrix();
     SkPoint mapEvent(float x, float y);
@@ -141,6 +142,7 @@ private:
 
     // transform data
     SkScalar               fZoomLevel;
+    SkScalar               fRotation;
 
     sk_app::CommandSet     fCommands;