Move inval dedup to Window for wider usages.

tools/viewer/Viewer.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "Viewer.h"
 
 #include "GMSlide.h"
@@ skipping 65 matching lines @@
     fWindow->attach(fBackendType, DisplayParams());
 
     // register callbacks
     fCommands.attach(fWindow);
     fWindow->registerPaintFunc(on_paint_handler, this);
     fWindow->registerTouchFunc(on_touch_handler, this);
 
     // add key-bindings
     fCommands.addCommand('s', "Overlays", "Toggle stats display", [this]() {
         this->fDisplayStats = !this->fDisplayStats;
-        fWindow->inval();
+        fWindow->invalIfNeeded();
     });
     fCommands.addCommand('c', "Modes", "Toggle sRGB color mode", [this]() {
         DisplayParams params = fWindow->getDisplayParams();
         params.fProfileType = (kLinear_SkColorProfileType == params.fProfileType)
             ? kSRGB_SkColorProfileType : kLinear_SkColorProfileType;
         fWindow->setDisplayParams(params);
         this->updateTitle();
-        fWindow->inval();
+        fWindow->invalIfNeeded();
     });
     fCommands.addCommand(Window::Key::kRight, "Right", "Navigation", "Next slide", [this]() {
         int previousSlide = fCurrentSlide;
         fCurrentSlide++;
         if (fCurrentSlide >= fSlides.count()) {
             fCurrentSlide = 0;
         }
         this->setupCurrentSlide(previousSlide);
     });
     fCommands.addCommand(Window::Key::kLeft, "Left", "Navigation", "Previous slide", [this]() {
         int previousSlide = fCurrentSlide;
         fCurrentSlide--;
         if (fCurrentSlide < 0) {
             fCurrentSlide = fSlides.count() - 1;
         }
         this->setupCurrentSlide(previousSlide);
     });
     fCommands.addCommand(Window::Key::kUp, "Up", "Transform", "Zoom in", [this]() {
         this->changeZoomLevel(1.f / 32.f);
-        fWindow->inval();
+        fWindow->invalIfNeeded();
     });
     fCommands.addCommand(Window::Key::kDown, "Down", "Transform", "Zoom out", [this]() {
         this->changeZoomLevel(-1.f / 32.f);
-        fWindow->inval();
+        fWindow->invalIfNeeded();
     });
 #ifndef SK_BUILD_FOR_ANDROID
     fCommands.addCommand('d', "Modes", "Change rendering backend", [this]() {
         fWindow->detach();
 
         if (sk_app::Window::kVulkan_BackendType == fBackendType) {
             fBackendType = sk_app::Window::kNativeGL_BackendType;
         } 
         // TODO: get Vulkan -> OpenGL working without swapchain creation failure
         //else if (sk_app::Window::kNativeGL_BackendType == fBackendType) {
@@ skipping 103 matching lines @@
         SkRect windowRect = fWindow->getContentRect();
         fDefaultMatrixInv.mapRect(&windowRect);
         fGesture.setTransLimit(SkRect::MakeWH(slideSize.width(), slideSize.height()), windowRect);
     }
 
     this->updateTitle();
     fSlides[fCurrentSlide]->load();
     if (previousSlide >= 0) {
         fSlides[previousSlide]->unload();
     }
-    fWindow->inval();
+    fWindow->invalIfNeeded();
 }
 
 #define MAX_ZOOM_LEVEL  8
 #define MIN_ZOOM_LEVEL  -8
 
 void Viewer::changeZoomLevel(float delta) {
     fZoomLevel += delta;
     if (fZoomLevel > 0) {
         fZoomLevel = SkMinScalar(fZoomLevel, MAX_ZOOM_LEVEL);
         fZoomScale = fZoomLevel + SK_Scalar1;
@@ skipping 59 matching lines @@
         }
         case Window::kDown_InputState: {
             fGesture.touchBegin(castedOwner, touchPoint.fX, touchPoint.fY);
             break;
         }
         case Window::kMove_InputState: {
             fGesture.touchMoved(castedOwner, touchPoint.fX, touchPoint.fY);
             break;
         }
     }
-    fWindow->inval();
+    fWindow->invalIfNeeded();
     return true;
 }
 
 void Viewer::drawStats(SkCanvas* canvas) {
     static const float kPixelPerMS = 2.0f;
     static const int kDisplayWidth = 130;
     static const int kDisplayHeight = 100;
     static const int kDisplayPadding = 10;
     static const int kGraphPadding = 3;
     static const SkScalar kBaseMS = 1000.f / 60.f;  // ms/frame to hit 60 fps
@@ skipping 39 matching lines @@
 }
 
 void Viewer::onIdle(double ms) {
     // Record measurements
     fMeasurements[fCurrentMeasurement++] = ms;
     fCurrentMeasurement &= (kMeasurementCount - 1);  // fast mod
     SkASSERT(fCurrentMeasurement < kMeasurementCount);
 
     fAnimTimer.updateTime();
     if (fSlides[fCurrentSlide]->animate(fAnimTimer) || fDisplayStats) {
-        fWindow->inval();
+        fWindow->invalIfNeeded();
     }
 }