add DeferredCanvas mode to SampleApp

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 163 matching lines @@
 #endif
     }
 
     virtual void setUpBackend(SampleWindow* win, int msaaSampleCount) {
         SkASSERT(kNone_BackEndType == fBackend);
 
         fBackend = kNone_BackEndType;
 
 #if SK_SUPPORT_GPU
         switch (win->getDeviceType()) {
-            case kRaster_DeviceType:
-                // fallthrough
-            case kPicture_DeviceType:
-                // fallthrough
+            case kRaster_DeviceType:    // fallthrough
+            case kPicture_DeviceType:    // fallthrough
+            case kDeferred_DeviceType:    // fallthrough
             case kGPU_DeviceType:
                 // all these guys use the native backend
                 fBackend = kNativeGL_BackEndType;
                 break;
 #if SK_ANGLE
             case kANGLE_DeviceType:
                 // ANGLE is really the only odd man out
                 fBackend = kANGLE_BackEndType;
                 break;
 #endif // SK_ANGLE
             default:
                 SkASSERT(false);
                 break;
         }
         AttachmentInfo attachmentInfo;
         bool result = win->attach(fBackend, msaaSampleCount, &attachmentInfo);
         if (!result) {
             SkDebugf("Failed to initialize GL");
             return;
         }
         fMSAASampleCount = msaaSampleCount;
 
         SkASSERT(NULL == fCurIntf);
         SkAutoTUnref<const GrGLInterface> glInterface;
         switch (win->getDeviceType()) {
-            case kRaster_DeviceType:
-                // fallthrough
-            case kPicture_DeviceType:
-                // fallthrough
+            case kRaster_DeviceType:    // fallthrough
+            case kPicture_DeviceType:   // fallthrough
+            case kDeferred_DeviceType:  // fallthrough
             case kGPU_DeviceType:
                 // all these guys use the native interface
                 glInterface.reset(GrGLCreateNativeInterface());
                 break;
 #if SK_ANGLE
             case kANGLE_DeviceType:
                 glInterface.reset(GrGLCreateANGLEInterface());
                 break;
 #endif // SK_ANGLE
             default:
@@ skipping 439 matching lines @@
 
 static inline SampleWindow::DeviceType cycle_devicetype(SampleWindow::DeviceType ct) {
     static const SampleWindow::DeviceType gCT[] = {
         SampleWindow::kPicture_DeviceType,
 #if SK_SUPPORT_GPU
         SampleWindow::kGPU_DeviceType,
 #if SK_ANGLE
         SampleWindow::kANGLE_DeviceType,
 #endif // SK_ANGLE
 #endif // SK_SUPPORT_GPU
-        SampleWindow::kRaster_DeviceType
+        SampleWindow::kDeferred_DeviceType,
+        SampleWindow::kRaster_DeviceType,
     };
     SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gCT) == SampleWindow::kDeviceTypeCnt, array_size_mismatch);
     return gCT[ct];
 }
 
 static SkString getSampleTitle(const SkViewFactory* sampleFactory) {
     SkView* view = (*sampleFactory)();
     SkString title;
     SampleCode::RequestTitle(view, &title);
     view->unref();
@@ skipping 135 matching lines @@
 
     fTransitionNext = 6;
     fTransitionPrev = 2;
 
     int sinkID = this->getSinkID();
     fAppMenu = new SkOSMenu;
     fAppMenu->setTitle("Global Settings");
     int itemID;
 
     itemID =fAppMenu->appendList("Device Type", "Device Type", sinkID, 0,
-                                "Raster", "Picture", "OpenGL",
+                                "Raster", "Picture", "OpenGL", "Deferred",
 #if SK_ANGLE
                                 "ANGLE",
 #endif
                                 NULL);
     fAppMenu->assignKeyEquivalentToItem(itemID, 'd');
     itemID = fAppMenu->appendTriState("AA", "AA", sinkID, fAAState);
     fAppMenu->assignKeyEquivalentToItem(itemID, 'b');
     itemID = fAppMenu->appendTriState("LCD", "LCD", sinkID, fLCDState);
     fAppMenu->assignKeyEquivalentToItem(itemID, 'l');
     itemID = fAppMenu->appendList("FilterQuality", "FilterQuality", sinkID, fFilterQualityIndex,
@@ skipping 346 matching lines @@
             name.set("unknown_sample");
         }
         name.append(".pdf");
 #ifdef SK_BUILD_FOR_ANDROID
         name.prepend("/sdcard/");
 #endif
         fPDFDocument.reset(SkDocument::CreatePDF(name.c_str()));
         canvas = fPDFDocument->beginPage(this->width(), this->height());
     } else if (kPicture_DeviceType == fDeviceType) {
         canvas = fRecorder.beginRecording(9999, 9999, NULL, 0);
+    } else if (kDeferred_DeviceType == fDeviceType) {
+        fDeferredSurface.reset(canvas->newSurface(canvas->imageInfo()));
+        if (fDeferredSurface.get()) {
+            fDeferredCanvas.reset(SkDeferredCanvas::Create(fDeferredSurface));
+            canvas = fDeferredCanvas;
+        }
     } else {
         canvas = this->INHERITED::beforeChildren(canvas);
     }
 
     if (fUseClip) {
         canvas->drawColor(0xFFFF88FF);
         canvas->clipPath(fClipPath, SkRegion::kIntersect_Op, true);
     }
 
     return canvas;
@@ skipping 68 matching lines @@
 
             SkAutoDataUnref data(ostream.copyToData());
             SkMemoryStream istream(data->data(), data->size());
             SkAutoTUnref<SkPicture> pict(SkPicture::CreateFromStream(&istream));
             if (pict.get() != NULL) {
                 orig->drawPicture(pict.get());
             }
         } else {
             picture->playback(orig);
         }
+    } else if (kDeferred_DeviceType == fDeviceType) {
+        SkAutoTUnref<SkImage> image(fDeferredCanvas->newImageSnapshot());
+        if (image) {
+            orig->drawImage(image, 0, 0, NULL);
+        }
+        fDeferredCanvas.reset(NULL);
+        fDeferredSurface.reset(NULL);
     }
 
     // Do this after presentGL and other finishing, rather than in afterChild
     if (fMeasureFPS && fMeasureFPS_StartTime) {
         fMeasureFPS_Time += SkTime::GetMSecs() - fMeasureFPS_StartTime;
     }
 }
 
 void SampleWindow::beforeChild(SkView* child, SkCanvas* canvas) {
     if (fRotate) {
@@ skipping 554 matching lines @@
 
 static const char* gDeviceTypePrefix[] = {
     "raster: ",
     "picture: ",
 #if SK_SUPPORT_GPU
     "opengl: ",
 #if SK_ANGLE
     "angle: ",
 #endif // SK_ANGLE
 #endif // SK_SUPPORT_GPU
+    "deferred: ",
 };
 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gDeviceTypePrefix) == SampleWindow::kDeviceTypeCnt,
                   array_size_mismatch);
 
 static const char* trystate_str(SkOSMenu::TriState state,
                                 const char trueStr[], const char falseStr[]) {
     if (SkOSMenu::kOnState == state) {
         return trueStr;
     } else if (SkOSMenu::kOffState == state) {
         return falseStr;
@@ skipping 414 matching lines @@
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }