deferred canvas

samplecode/SampleApp.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 786 matching lines @@
 #endif
 
     fUseClip = false;
     fUsePicture = false;
     fAnimating = false;
     fRotate = false;
     fPerspAnim = false;
     fRequestGrabImage = false;
     fTilingMode = kNo_Tiling;
     fMeasureFPS = false;
+    fUseDeferredCanvas = false;
     fLCDState = SkOSMenu::kMixedState;
     fAAState = SkOSMenu::kMixedState;
     fSubpixelState = SkOSMenu::kMixedState;
     fHintingState = 0;
     fPixelGeometryIndex = 0;
     fFilterQualityIndex = 0;
     fFlipAxis = 0;
 
     fMouseX = fMouseY = 0;
     fFatBitsScale = 8;
@@ skipping 163 matching lines @@
         paint.setColor(SK_ColorBLACK);
         canvas->drawText(c_str, size, left + SK_Scalar1, top + SK_Scalar1, paint);
     }
     paint.setColor(desiredColor);
     canvas->drawText(c_str, size, left, top, paint);
 }
 
 #define XCLIP_N  8
 #define YCLIP_N  8
 
+#include "SkDeferredCanvas.h"
+#include "SkDumpCanvas.h"
+
 void SampleWindow::draw(SkCanvas* canvas) {
     gAnimTimer.updateTime();
 
     if (fGesture.isActive()) {
         this->updateMatrix();
     }
 
     if (fMeasureFPS) {
         fMeasureFPS_Time = 0;
     }
 
     SkSize tile = this->tileSize();
 
     if (kNo_Tiling == fTilingMode) {
-        this->INHERITED::draw(canvas); // no looping or surfaces needed
+        SkDebugfDumper dumper;
+        SkDumpCanvas dump(&dumper);
+        SkDeferredCanvas deferred(canvas);
+        SkCanvas* c = fUseDeferredCanvas ? &deferred : canvas;
+        this->INHERITED::draw(c); // no looping or surfaces needed
     } else {
         const SkScalar w = SkScalarCeilToScalar(tile.width());
         const SkScalar h = SkScalarCeilToScalar(tile.height());
         SkImageInfo info = SkImageInfo::MakeN32Premul(SkScalarTruncToInt(w), SkScalarTruncToInt(h));
         auto surface(canvas->makeSurface(info));
         SkCanvas* tileCanvas = surface->getCanvas();
 
         for (SkScalar y = 0; y < height(); y += h) {
             for (SkScalar x = 0; x < width(); x += w) {
                 SkAutoCanvasRestore acr(tileCanvas, true);
@@ skipping 645 matching lines @@
         case 'B':
             post_event_to_sink(new SkEvent("PictFileView::toggleBBox"), curr_view(this));
             // Cannot call updateTitle() synchronously, because the toggleBBox event is still in
             // the queue.
             post_event_to_sink(new SkEvent(gUpdateWindowTitleEvtName), this);
             this->inval(nullptr);
             break;
         case 'D':
             toggleDistanceFieldFonts();
             break;
+        case 'E':
+            fUseDeferredCanvas = !fUseDeferredCanvas;
+            this->inval(nullptr);
+            break;
         case 'f':
             // only
             toggleFPS();
             break;
         case 'F':
             FLAGS_portableFonts ^= true;
             this->inval(nullptr);
             break;
         case 'g':
             fRequestGrabImage = true;
@@ skipping 333 matching lines @@
     }
     if (fPerspAnim) {
         title.prepend("<K> ");
     }
     if (this->getSurfaceProps().flags() & SkSurfaceProps::kUseDeviceIndependentFonts_Flag) {
         title.prepend("<DIF> ");
     }
     if (fUsePicture) {
         title.prepend("<P> ");
     }
+    if (fUseDeferredCanvas) {
+        title.prepend("<E> ");
+    }
 
     title.prepend(trystate_str(fLCDState, "LCD ", "lcd "));
     title.prepend(trystate_str(fAAState, "AA ", "aa "));
     title.prepend(gFilterQualityStates[fFilterQualityIndex].fLabel);
     title.prepend(trystate_str(fSubpixelState, "S ", "s "));
     title.prepend(fFlipAxis & kFlipAxis_X ? "X " : nullptr);
     title.prepend(fFlipAxis & kFlipAxis_Y ? "Y " : nullptr);
     title.prepend(gHintingStates[fHintingState].label);
     title.prepend(gPixelGeometryStates[fPixelGeometryIndex].label);
 
@@ skipping 205 matching lines @@
 #ifdef SK_BUILD_FOR_MAC
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }