More cleanup in the Vulkan viewer

tools/vulkan/Window.h

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #ifndef Window_DEFINED
 #define Window_DEFINED
 
 #include "SkTypes.h"
 
 class SkCanvas;
 class VulkanTestContext;
 
 class Window {
 public:
     static Window* CreateNativeWindow(void* platformData);
 
     virtual ~Window() {};
 
     virtual void setTitle(const char*) = 0;
     virtual void show() = 0;
+    virtual void inval() = 0;
 
     struct AttachmentInfo {
         int fSampleCount;
         int fStencilBits;
     };
 
     enum BackEndType {
         kNativeGL_BackendType,
         kVulkan_BackendType
     };
@@ skipping 81 matching lines @@
         fPaintFunc = func;
         fPaintUserData = userData;
     }
 
     bool onChar(SkUnichar c, uint32_t modifiers);
     bool onKey(Key key, InputState state, uint32_t modifiers);
     bool onMouse(int x, int y, InputState state, uint32_t modifiers);
     void onPaint();
     void onResize(uint32_t width, uint32_t height);
 
+    uint32_t width() { return fWidth; }
+    uint32_t height() { return fHeight;  }
+
 protected:
     Window();
 
+    uint32_t     fWidth;
+    uint32_t     fHeight;
+
     OnCharFunc   fCharFunc;
     void*        fCharUserData;
     OnKeyFunc    fKeyFunc;
     void*        fKeyUserData;
     OnMouseFunc  fMouseFunc;
     void*        fMouseUserData;
     OnPaintFunc  fPaintFunc;
     void*        fPaintUserData;
 
     VulkanTestContext* fTestContext;
 };
 
 
 #endif