tests/DeferredCanvasTest.cpp - platform/external/skia - Gitiles


 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
 #include "SkBitmap.h"
 #include "SkBitmapProcShader.h"
 #include "SkDeferredCanvas.h"
 #include "SkDevice.h"
 #include "SkGradientShader.h"
 #include "SkShader.h"

 static const int gWidth = 2;
 static const int gHeight = 2;

 static void create(SkBitmap* bm, SkBitmap::Config config, SkColor color) {
     bm->setConfig(config, gWidth, gHeight);
     bm->allocPixels();
     bm->eraseColor(color);
 }

 static void TestDeferredCanvasBitmapAccess(skiatest::Reporter* reporter) {
     SkBitmap store;

     create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
     SkDevice device(store);
     SkDeferredCanvas canvas(&device);

     canvas.clear(0x00000000);

     SkAutoLockPixels alp(store);
     REPORTER_ASSERT(reporter, store.getColor(0,0) == 0xFFFFFFFF); //verify that clear was deferred
     SkBitmap accessed = canvas.getDevice()->accessBitmap(false);
     REPORTER_ASSERT(reporter, store.getColor(0,0) == 0x00000000); //verify that clear was executed
     REPORTER_ASSERT(reporter, accessed.pixelRef() == store.pixelRef());
 }

 static void TestDeferredCanvasFlush(skiatest::Reporter* reporter) {
     SkBitmap store;

     create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
     SkDevice device(store);
     SkDeferredCanvas canvas(&device);

     canvas.clear(0x00000000);

     SkAutoLockPixels alp(store);
     REPORTER_ASSERT(reporter, store.getColor(0,0) == 0xFFFFFFFF); //verify that clear was deferred
     canvas.flush();
     REPORTER_ASSERT(reporter, store.getColor(0,0) == 0x00000000); //verify that clear was executed
 }

 static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
     SkBitmap store;
     SkRect fullRect;
     fullRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(gWidth),
         SkIntToScalar(gHeight));
     SkRect partialRect;
     partialRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0),
         SkIntToScalar(1), SkIntToScalar(1));
     create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
     SkDevice device(store);
     SkDeferredCanvas canvas(&device);

     // verify that frame is intially fresh
     REPORTER_ASSERT(reporter, canvas.isFreshFrame());
     // no clearing op since last call to isFreshFrame -> not fresh
     REPORTER_ASSERT(reporter, !canvas.isFreshFrame());

     // Verify that clear triggers a fresh frame
     canvas.clear(0x00000000);
     REPORTER_ASSERT(reporter, canvas.isFreshFrame());

     // Verify that clear with saved state triggers a fresh frame
     canvas.save(SkCanvas::kMatrixClip_SaveFlag);
     canvas.clear(0x00000000);
     canvas.restore();
     REPORTER_ASSERT(reporter, canvas.isFreshFrame());

     // Verify that clear within a layer does NOT trigger a fresh frame
     canvas.saveLayer(NULL, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
     canvas.clear(0x00000000);
     canvas.restore();
     REPORTER_ASSERT(reporter, !canvas.isFreshFrame());

     // Verify that a clear with clipping triggers a fresh frame
     // (clear is not affected by clipping)
     canvas.save(SkCanvas::kMatrixClip_SaveFlag);
     canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
     canvas.clear(0x00000000);
     canvas.restore();
     REPORTER_ASSERT(reporter, canvas.isFreshFrame());

     // Verify that full frame rects with different forms of opaque paint
     // trigger frames to be marked as fresh
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, canvas.isFreshFrame());
     }
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
         paint.setXfermodeMode(SkXfermode::kSrcIn_Mode);
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         SkBitmap bmp;
         create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
         bmp.setIsOpaque(true);
         SkShader* shader = SkShader::CreateBitmapShader(bmp,
             SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
         paint.setShader(shader)->unref();
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, canvas.isFreshFrame());
     }

     // Verify that full frame rects with different forms of non-opaque paint
     // do not trigger frames to be marked as fresh
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(254);
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         // Defining a cone that partially overlaps the canvas
         const SkPoint pt1 = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
         const SkScalar r1 = SkIntToScalar(1);
         const SkPoint pt2 = SkPoint::Make(SkIntToScalar(10), SkIntToScalar(0));
         const SkScalar r2 = SkIntToScalar(5);
         const SkColor colors[2] = {SK_ColorWHITE, SK_ColorWHITE};
         const SkScalar pos[2] = {0, SK_Scalar1};
         SkShader* shader = SkGradientShader::CreateTwoPointConical(
             pt1, r1, pt2, r2, colors, pos, 2, SkShader::kClamp_TileMode, NULL);
         paint.setShader(shader)->unref();
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         SkBitmap bmp;
         create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
         bmp.setIsOpaque(false);
         SkShader* shader = SkShader::CreateBitmapShader(bmp,
             SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
         paint.setShader(shader)->unref();
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }

     // Verify that incomplete coverage does not trigger a fresh frame
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
         canvas.drawRect(partialRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }

     // Verify that incomplete coverage due to clipping does not trigger a fresh
     // frame
     {
         canvas.save(SkCanvas::kMatrixClip_SaveFlag);
         canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
         canvas.drawRect(fullRect, paint);
         canvas.restore();
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }
     {
         canvas.save(SkCanvas::kMatrixClip_SaveFlag);
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
         SkPath path;
         path.addCircle(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(2));
         canvas.clipPath(path, SkRegion::kIntersect_Op, false);
         canvas.drawRect(fullRect, paint);
         canvas.restore();
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }

     // Verify that stroked rect does not trigger a fresh frame
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setAlpha(255);
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
     }

     // Verify kSrcMode triggers a fresh frame even with transparent color
     {
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(100);
         paint.setXfermodeMode(SkXfermode::kSrc_Mode);
         canvas.drawRect(fullRect, paint);
         REPORTER_ASSERT(reporter, canvas.isFreshFrame());
     }
 }

 class MockDevice : public SkDevice {
 public:
     MockDevice(const SkBitmap& bm) : SkDevice(bm) {
         fDrawBitmapCallCount = 0;
     }
     virtual void drawBitmap(const SkDraw&, const SkBitmap&,
                             const SkIRect*,
                             const SkMatrix&, const SkPaint&) {
         fDrawBitmapCallCount++;
     }

     int fDrawBitmapCallCount;
 };

 // Verifies that the deferred canvas triggers a flush when its memory
 // limit is exceeded
 static void TestDeferredCanvasMemoryLimit(skiatest::Reporter* reporter) {
     SkBitmap store;
     store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     store.allocPixels();
     MockDevice mockDevice(store);
     SkDeferredCanvas canvas(&mockDevice);
     canvas.setMaxRecordingStorage(160000);

     SkBitmap sourceImage;
     // 100 by 100 image, takes 40,000 bytes in memory
     sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     sourceImage.allocPixels();

     for (int i = 0; i < 5; i++) {
         sourceImage.notifyPixelsChanged(); // to force re-serialization
         canvas.drawBitmap(sourceImage, 0, 0, NULL);
     }

     REPORTER_ASSERT(reporter, mockDevice.fDrawBitmapCallCount == 4);
 }

 class NotificationCounter : public SkDeferredCanvas::NotificationClient {
 public:
     NotificationCounter() {
         fPrepareForDrawCount = fStorageAllocatedChangedCount =
             fFlushedDrawCommandsCount = fSkippedPendingDrawCommandsCount = 0;
     }

     virtual void prepareForDraw() SK_OVERRIDE {
         fPrepareForDrawCount++;
     }
     virtual void storageAllocatedForRecordingChanged(size_t) SK_OVERRIDE {
         fStorageAllocatedChangedCount++;
     }
     virtual void flushedDrawCommands() SK_OVERRIDE {
         fFlushedDrawCommandsCount++;
     }
     virtual void skippedPendingDrawCommands() SK_OVERRIDE {
         fSkippedPendingDrawCommandsCount++;
     }

     int fPrepareForDrawCount;
     int fStorageAllocatedChangedCount;
     int fFlushedDrawCommandsCount;
     int fSkippedPendingDrawCommandsCount;

 private:
     typedef SkDeferredCanvas::NotificationClient INHERITED;
 };

 static void TestDeferredCanvasBitmapCaching(skiatest::Reporter* reporter) {
     SkBitmap store;
     store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     store.allocPixels();
     SkDevice device(store);
     NotificationCounter notificationCounter;
     SkDeferredCanvas canvas(&device);
     canvas.setNotificationClient(&notificationCounter);

     const int imageCount = 2;
     SkBitmap sourceImages[imageCount];
     for (int i = 0; i < imageCount; i++)
     {
         sourceImages[i].setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
         sourceImages[i].allocPixels();
     }

     size_t bitmapSize = sourceImages[0].getSize();

     canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fStorageAllocatedChangedCount);
     // stored bitmap + drawBitmap command
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > bitmapSize);

     // verify that nothing can be freed at this point
     REPORTER_ASSERT(reporter, 0 == canvas.freeMemoryIfPossible(~0U));

     // verify that flush leaves image in cache
     REPORTER_ASSERT(reporter, 0 == notificationCounter.fFlushedDrawCommandsCount);
     REPORTER_ASSERT(reporter, 0 == notificationCounter.fPrepareForDrawCount);
     canvas.flush();
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fPrepareForDrawCount);
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() >= bitmapSize);

     // verify that after a flush, cached image can be freed
     REPORTER_ASSERT(reporter, canvas.freeMemoryIfPossible(~0U) >= bitmapSize);

     // Verify that caching works for avoiding multiple copies of the same bitmap
     canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
     REPORTER_ASSERT(reporter, 2 == notificationCounter.fStorageAllocatedChangedCount);
     canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
     REPORTER_ASSERT(reporter, 2 == notificationCounter.fStorageAllocatedChangedCount);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() < 2 * bitmapSize);

     // Verify partial eviction based on bytesToFree
     canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
     canvas.flush();
     REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > 2 * bitmapSize);
     size_t bytesFreed = canvas.freeMemoryIfPossible(1);
     REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
     REPORTER_ASSERT(reporter,  bytesFreed >= bitmapSize);
     REPORTER_ASSERT(reporter,  bytesFreed < 2*bitmapSize);

     // Verifiy that partial purge works, image zero is in cache but not reffed by
     // a pending draw, while image 1 is locked-in.
     canvas.freeMemoryIfPossible(~0U);
     REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
     canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
     canvas.flush();
     canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
     bytesFreed = canvas.freeMemoryIfPossible(~0U);
     // only one bitmap should have been freed.
     REPORTER_ASSERT(reporter,  bytesFreed >= bitmapSize);
     REPORTER_ASSERT(reporter,  bytesFreed < 2*bitmapSize);
     // Clear for next test
     canvas.flush();
     canvas.freeMemoryIfPossible(~0U);
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() < bitmapSize);

     // Verify the image cache is sensitive to genID bumps
     canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
     sourceImages[1].notifyPixelsChanged();
     canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
     REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > 2*bitmapSize);

     // Verify that nothing in this test caused commands to be skipped
     REPORTER_ASSERT(reporter, 0 == notificationCounter.fSkippedPendingDrawCommandsCount);
 }

 static void TestDeferredCanvasSkip(skiatest::Reporter* reporter) {
     SkBitmap store;
     store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     store.allocPixels();
     SkDevice device(store);
     NotificationCounter notificationCounter;
     SkDeferredCanvas canvas(&device);
     canvas.setNotificationClient(&notificationCounter);
     canvas.clear(0x0);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fSkippedPendingDrawCommandsCount);
     REPORTER_ASSERT(reporter, 0 == notificationCounter.fFlushedDrawCommandsCount);
     canvas.flush();
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fSkippedPendingDrawCommandsCount);
     REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);

 }

 static void TestDeferredCanvasBitmapShaderNoLeak(skiatest::Reporter* reporter) {
     // This is a regression test for crbug.com/155875
     // This test covers a code path that inserts bitmaps into the bitmap heap through the
     // flattening of SkBitmapProcShaders. The refcount in the bitmap heap is maintained through
     // the flattening and unflattening of the shader.
     SkBitmap store;
     store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     store.allocPixels();
     SkDevice device(store);
     SkDeferredCanvas canvas(&device);
     // test will fail if nbIterations is not in sync with
     // BITMAPS_TO_KEEP in SkGPipeWrite.cpp
     const int nbIterations = 5;
     size_t bytesAllocated = 0;
     for(int pass = 0; pass < 2; ++pass) {
         for(int i = 0; i < nbIterations; ++i) {
             SkPaint paint;
             SkBitmap paintPattern;
             paintPattern.setConfig(SkBitmap::kARGB_8888_Config, 10, 10);
             paintPattern.allocPixels();
             paint.setShader(SkNEW_ARGS(SkBitmapProcShader,
                 (paintPattern, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode)))->unref();
             canvas.drawPaint(paint);
             canvas.flush();

             // In the first pass, memory allocation should be monotonically increasing as
             // the bitmap heap slots fill up.  In the second pass memory allocation should be
             // stable as bitmap heap slots get recycled.
             size_t newBytesAllocated = canvas.storageAllocatedForRecording();
             if (pass == 0) {
                 REPORTER_ASSERT(reporter, newBytesAllocated > bytesAllocated);
                 bytesAllocated = newBytesAllocated;
             } else {
                 REPORTER_ASSERT(reporter, newBytesAllocated == bytesAllocated);
             }
         }
     }
     // All cached resources should be evictable since last canvas call was flush()
     canvas.freeMemoryIfPossible(~0U);
     REPORTER_ASSERT(reporter, 0 == canvas.storageAllocatedForRecording());
 }

 static void TestDeferredCanvasBitmapSizeThreshold(skiatest::Reporter* reporter) {
     SkBitmap store;
     store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     store.allocPixels();

     SkBitmap sourceImage;
     // 100 by 100 image, takes 40,000 bytes in memory
     sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     sourceImage.allocPixels();

     // 1 under : should not store the image
     {
         SkDevice device(store);
         SkDeferredCanvas canvas(&device);
         canvas.setBitmapSizeThreshold(39999);
         canvas.drawBitmap(sourceImage, 0, 0, NULL);
         size_t newBytesAllocated = canvas.storageAllocatedForRecording();
         REPORTER_ASSERT(reporter, newBytesAllocated == 0);
     }

     // exact value : should store the image
     {
         SkDevice device(store);
         SkDeferredCanvas canvas(&device);
         canvas.setBitmapSizeThreshold(40000);
         canvas.drawBitmap(sourceImage, 0, 0, NULL);
         size_t newBytesAllocated = canvas.storageAllocatedForRecording();
         REPORTER_ASSERT(reporter, newBytesAllocated > 0);
     }

     // 1 over : should still store the image
     {
         SkDevice device(store);
         SkDeferredCanvas canvas(&device);
         canvas.setBitmapSizeThreshold(40001);
         canvas.drawBitmap(sourceImage, 0, 0, NULL);
         size_t newBytesAllocated = canvas.storageAllocatedForRecording();
         REPORTER_ASSERT(reporter, newBytesAllocated > 0);
     }
 }

 static void TestDeferredCanvas(skiatest::Reporter* reporter) {
     TestDeferredCanvasBitmapAccess(reporter);
     TestDeferredCanvasFlush(reporter);
     TestDeferredCanvasFreshFrame(reporter);
     TestDeferredCanvasMemoryLimit(reporter);
     TestDeferredCanvasBitmapCaching(reporter);
     TestDeferredCanvasSkip(reporter);
     TestDeferredCanvasBitmapShaderNoLeak(reporter);
     TestDeferredCanvasBitmapSizeThreshold(reporter);
 }

 #include "TestClassDef.h"
 DEFINE_TESTCLASS("DeferredCanvas", TestDeferredCanvasClass, TestDeferredCanvas)

	/*
	* Copyright 2012 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/
	#include "Test.h"
	#include "SkBitmap.h"
	#include "SkBitmapProcShader.h"
	#include "SkDeferredCanvas.h"
	#include "SkDevice.h"
	#include "SkGradientShader.h"
	#include "SkShader.h"

	static const int gWidth = 2;
	static const int gHeight = 2;

	static void create(SkBitmap* bm, SkBitmap::Config config, SkColor color) {
	bm->setConfig(config, gWidth, gHeight);
	bm->allocPixels();
	bm->eraseColor(color);
	}

	static void TestDeferredCanvasBitmapAccess(skiatest::Reporter* reporter) {
	SkBitmap store;

	create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);

	canvas.clear(0x00000000);

	SkAutoLockPixels alp(store);
	REPORTER_ASSERT(reporter, store.getColor(0,0) == 0xFFFFFFFF); //verify that clear was deferred
	SkBitmap accessed = canvas.getDevice()->accessBitmap(false);
	REPORTER_ASSERT(reporter, store.getColor(0,0) == 0x00000000); //verify that clear was executed
	REPORTER_ASSERT(reporter, accessed.pixelRef() == store.pixelRef());
	}

	static void TestDeferredCanvasFlush(skiatest::Reporter* reporter) {
	SkBitmap store;

	create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);

	canvas.clear(0x00000000);

	SkAutoLockPixels alp(store);
	REPORTER_ASSERT(reporter, store.getColor(0,0) == 0xFFFFFFFF); //verify that clear was deferred
	canvas.flush();
	REPORTER_ASSERT(reporter, store.getColor(0,0) == 0x00000000); //verify that clear was executed
	}

	static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
	SkBitmap store;
	SkRect fullRect;
	fullRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(gWidth),
	SkIntToScalar(gHeight));
	SkRect partialRect;
	partialRect.setXYWH(SkIntToScalar(0), SkIntToScalar(0),
	SkIntToScalar(1), SkIntToScalar(1));
	create(&store, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);

	// verify that frame is intially fresh
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());
	// no clearing op since last call to isFreshFrame -> not fresh
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());

	// Verify that clear triggers a fresh frame
	canvas.clear(0x00000000);
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());

	// Verify that clear with saved state triggers a fresh frame
	canvas.save(SkCanvas::kMatrixClip_SaveFlag);
	canvas.clear(0x00000000);
	canvas.restore();
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());

	// Verify that clear within a layer does NOT trigger a fresh frame
	canvas.saveLayer(NULL, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
	canvas.clear(0x00000000);
	canvas.restore();
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());

	// Verify that a clear with clipping triggers a fresh frame
	// (clear is not affected by clipping)
	canvas.save(SkCanvas::kMatrixClip_SaveFlag);
	canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
	canvas.clear(0x00000000);
	canvas.restore();
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());

	// Verify that full frame rects with different forms of opaque paint
	// trigger frames to be marked as fresh
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(255);
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());
	}
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(255);
	paint.setXfermodeMode(SkXfermode::kSrcIn_Mode);
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	SkBitmap bmp;
	create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
	bmp.setIsOpaque(true);
	SkShader* shader = SkShader::CreateBitmapShader(bmp,
	SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
	paint.setShader(shader)->unref();
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());
	}

	// Verify that full frame rects with different forms of non-opaque paint
	// do not trigger frames to be marked as fresh
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(254);
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	// Defining a cone that partially overlaps the canvas
	const SkPoint pt1 = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
	const SkScalar r1 = SkIntToScalar(1);
	const SkPoint pt2 = SkPoint::Make(SkIntToScalar(10), SkIntToScalar(0));
	const SkScalar r2 = SkIntToScalar(5);
	const SkColor colors[2] = {SK_ColorWHITE, SK_ColorWHITE};
	const SkScalar pos[2] = {0, SK_Scalar1};
	SkShader* shader = SkGradientShader::CreateTwoPointConical(
	pt1, r1, pt2, r2, colors, pos, 2, SkShader::kClamp_TileMode, NULL);
	paint.setShader(shader)->unref();
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	SkBitmap bmp;
	create(&bmp, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
	bmp.setIsOpaque(false);
	SkShader* shader = SkShader::CreateBitmapShader(bmp,
	SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
	paint.setShader(shader)->unref();
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}

	// Verify that incomplete coverage does not trigger a fresh frame
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(255);
	canvas.drawRect(partialRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}

	// Verify that incomplete coverage due to clipping does not trigger a fresh
	// frame
	{
	canvas.save(SkCanvas::kMatrixClip_SaveFlag);
	canvas.clipRect(partialRect, SkRegion::kIntersect_Op, false);
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(255);
	canvas.drawRect(fullRect, paint);
	canvas.restore();
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}
	{
	canvas.save(SkCanvas::kMatrixClip_SaveFlag);
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(255);
	SkPath path;
	path.addCircle(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(2));
	canvas.clipPath(path, SkRegion::kIntersect_Op, false);
	canvas.drawRect(fullRect, paint);
	canvas.restore();
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}

	// Verify that stroked rect does not trigger a fresh frame
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kStroke_Style);
	paint.setAlpha(255);
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, !canvas.isFreshFrame());
	}

	// Verify kSrcMode triggers a fresh frame even with transparent color
	{
	SkPaint paint;
	paint.setStyle(SkPaint::kFill_Style);
	paint.setAlpha(100);
	paint.setXfermodeMode(SkXfermode::kSrc_Mode);
	canvas.drawRect(fullRect, paint);
	REPORTER_ASSERT(reporter, canvas.isFreshFrame());
	}
	}

	class MockDevice : public SkDevice {
	public:
	MockDevice(const SkBitmap& bm) : SkDevice(bm) {
	fDrawBitmapCallCount = 0;
	}
	virtual void drawBitmap(const SkDraw&, const SkBitmap&,
	const SkIRect*,
	const SkMatrix&, const SkPaint&) {
	fDrawBitmapCallCount++;
	}

	int fDrawBitmapCallCount;
	};

	// Verifies that the deferred canvas triggers a flush when its memory
	// limit is exceeded
	static void TestDeferredCanvasMemoryLimit(skiatest::Reporter* reporter) {
	SkBitmap store;
	store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	store.allocPixels();
	MockDevice mockDevice(store);
	SkDeferredCanvas canvas(&mockDevice);
	canvas.setMaxRecordingStorage(160000);

	SkBitmap sourceImage;
	// 100 by 100 image, takes 40,000 bytes in memory
	sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	sourceImage.allocPixels();

	for (int i = 0; i < 5; i++) {
	sourceImage.notifyPixelsChanged(); // to force re-serialization
	canvas.drawBitmap(sourceImage, 0, 0, NULL);
	}

	REPORTER_ASSERT(reporter, mockDevice.fDrawBitmapCallCount == 4);
	}

	class NotificationCounter : public SkDeferredCanvas::NotificationClient {
	public:
	NotificationCounter() {
	fPrepareForDrawCount = fStorageAllocatedChangedCount =
	fFlushedDrawCommandsCount = fSkippedPendingDrawCommandsCount = 0;
	}

	virtual void prepareForDraw() SK_OVERRIDE {
	fPrepareForDrawCount++;
	}
	virtual void storageAllocatedForRecordingChanged(size_t) SK_OVERRIDE {
	fStorageAllocatedChangedCount++;
	}
	virtual void flushedDrawCommands() SK_OVERRIDE {
	fFlushedDrawCommandsCount++;
	}
	virtual void skippedPendingDrawCommands() SK_OVERRIDE {
	fSkippedPendingDrawCommandsCount++;
	}

	int fPrepareForDrawCount;
	int fStorageAllocatedChangedCount;
	int fFlushedDrawCommandsCount;
	int fSkippedPendingDrawCommandsCount;

	private:
	typedef SkDeferredCanvas::NotificationClient INHERITED;
	};

	static void TestDeferredCanvasBitmapCaching(skiatest::Reporter* reporter) {
	SkBitmap store;
	store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	store.allocPixels();
	SkDevice device(store);
	NotificationCounter notificationCounter;
	SkDeferredCanvas canvas(&device);
	canvas.setNotificationClient(&notificationCounter);

	const int imageCount = 2;
	SkBitmap sourceImages[imageCount];
	for (int i = 0; i < imageCount; i++)
	{
	sourceImages[i].setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	sourceImages[i].allocPixels();
	}

	size_t bitmapSize = sourceImages[0].getSize();

	canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fStorageAllocatedChangedCount);
	// stored bitmap + drawBitmap command
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > bitmapSize);

	// verify that nothing can be freed at this point
	REPORTER_ASSERT(reporter, 0 == canvas.freeMemoryIfPossible(~0U));

	// verify that flush leaves image in cache
	REPORTER_ASSERT(reporter, 0 == notificationCounter.fFlushedDrawCommandsCount);
	REPORTER_ASSERT(reporter, 0 == notificationCounter.fPrepareForDrawCount);
	canvas.flush();
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fPrepareForDrawCount);
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() >= bitmapSize);

	// verify that after a flush, cached image can be freed
	REPORTER_ASSERT(reporter, canvas.freeMemoryIfPossible(~0U) >= bitmapSize);

	// Verify that caching works for avoiding multiple copies of the same bitmap
	canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
	REPORTER_ASSERT(reporter, 2 == notificationCounter.fStorageAllocatedChangedCount);
	canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
	REPORTER_ASSERT(reporter, 2 == notificationCounter.fStorageAllocatedChangedCount);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() < 2 * bitmapSize);

	// Verify partial eviction based on bytesToFree
	canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);
	canvas.flush();
	REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > 2 * bitmapSize);
	size_t bytesFreed = canvas.freeMemoryIfPossible(1);
	REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
	REPORTER_ASSERT(reporter, bytesFreed >= bitmapSize);
	REPORTER_ASSERT(reporter, bytesFreed < 2*bitmapSize);

	// Verifiy that partial purge works, image zero is in cache but not reffed by
	// a pending draw, while image 1 is locked-in.
	canvas.freeMemoryIfPossible(~0U);
	REPORTER_ASSERT(reporter, 2 == notificationCounter.fFlushedDrawCommandsCount);
	canvas.drawBitmap(sourceImages[0], 0, 0, NULL);
	canvas.flush();
	canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
	bytesFreed = canvas.freeMemoryIfPossible(~0U);
	// only one bitmap should have been freed.
	REPORTER_ASSERT(reporter, bytesFreed >= bitmapSize);
	REPORTER_ASSERT(reporter, bytesFreed < 2*bitmapSize);
	// Clear for next test
	canvas.flush();
	canvas.freeMemoryIfPossible(~0U);
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() < bitmapSize);

	// Verify the image cache is sensitive to genID bumps
	canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
	sourceImages[1].notifyPixelsChanged();
	canvas.drawBitmap(sourceImages[1], 0, 0, NULL);
	REPORTER_ASSERT(reporter, canvas.storageAllocatedForRecording() > 2*bitmapSize);

	// Verify that nothing in this test caused commands to be skipped
	REPORTER_ASSERT(reporter, 0 == notificationCounter.fSkippedPendingDrawCommandsCount);
	}

	static void TestDeferredCanvasSkip(skiatest::Reporter* reporter) {
	SkBitmap store;
	store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	store.allocPixels();
	SkDevice device(store);
	NotificationCounter notificationCounter;
	SkDeferredCanvas canvas(&device);
	canvas.setNotificationClient(&notificationCounter);
	canvas.clear(0x0);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fSkippedPendingDrawCommandsCount);
	REPORTER_ASSERT(reporter, 0 == notificationCounter.fFlushedDrawCommandsCount);
	canvas.flush();
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fSkippedPendingDrawCommandsCount);
	REPORTER_ASSERT(reporter, 1 == notificationCounter.fFlushedDrawCommandsCount);

	}

	static void TestDeferredCanvasBitmapShaderNoLeak(skiatest::Reporter* reporter) {
	// This is a regression test for crbug.com/155875
	// This test covers a code path that inserts bitmaps into the bitmap heap through the
	// flattening of SkBitmapProcShaders. The refcount in the bitmap heap is maintained through
	// the flattening and unflattening of the shader.
	SkBitmap store;
	store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	store.allocPixels();
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);
	// test will fail if nbIterations is not in sync with
	// BITMAPS_TO_KEEP in SkGPipeWrite.cpp
	const int nbIterations = 5;
	size_t bytesAllocated = 0;
	for(int pass = 0; pass < 2; ++pass) {
	for(int i = 0; i < nbIterations; ++i) {
	SkPaint paint;
	SkBitmap paintPattern;
	paintPattern.setConfig(SkBitmap::kARGB_8888_Config, 10, 10);
	paintPattern.allocPixels();
	paint.setShader(SkNEW_ARGS(SkBitmapProcShader,
	(paintPattern, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode)))->unref();
	canvas.drawPaint(paint);
	canvas.flush();

	// In the first pass, memory allocation should be monotonically increasing as
	// the bitmap heap slots fill up. In the second pass memory allocation should be
	// stable as bitmap heap slots get recycled.
	size_t newBytesAllocated = canvas.storageAllocatedForRecording();
	if (pass == 0) {
	REPORTER_ASSERT(reporter, newBytesAllocated > bytesAllocated);
	bytesAllocated = newBytesAllocated;
	} else {
	REPORTER_ASSERT(reporter, newBytesAllocated == bytesAllocated);
	}
	}
	}
	// All cached resources should be evictable since last canvas call was flush()
	canvas.freeMemoryIfPossible(~0U);
	REPORTER_ASSERT(reporter, 0 == canvas.storageAllocatedForRecording());
	}

	static void TestDeferredCanvasBitmapSizeThreshold(skiatest::Reporter* reporter) {
	SkBitmap store;
	store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	store.allocPixels();

	SkBitmap sourceImage;
	// 100 by 100 image, takes 40,000 bytes in memory
	sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
	sourceImage.allocPixels();

	// 1 under : should not store the image
	{
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);
	canvas.setBitmapSizeThreshold(39999);
	canvas.drawBitmap(sourceImage, 0, 0, NULL);
	size_t newBytesAllocated = canvas.storageAllocatedForRecording();
	REPORTER_ASSERT(reporter, newBytesAllocated == 0);
	}

	// exact value : should store the image
	{
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);
	canvas.setBitmapSizeThreshold(40000);
	canvas.drawBitmap(sourceImage, 0, 0, NULL);
	size_t newBytesAllocated = canvas.storageAllocatedForRecording();
	REPORTER_ASSERT(reporter, newBytesAllocated > 0);
	}

	// 1 over : should still store the image
	{
	SkDevice device(store);
	SkDeferredCanvas canvas(&device);
	canvas.setBitmapSizeThreshold(40001);
	canvas.drawBitmap(sourceImage, 0, 0, NULL);
	size_t newBytesAllocated = canvas.storageAllocatedForRecording();
	REPORTER_ASSERT(reporter, newBytesAllocated > 0);
	}
	}

	static void TestDeferredCanvas(skiatest::Reporter* reporter) {
	TestDeferredCanvasBitmapAccess(reporter);
	TestDeferredCanvasFlush(reporter);
	TestDeferredCanvasFreshFrame(reporter);
	TestDeferredCanvasMemoryLimit(reporter);
	TestDeferredCanvasBitmapCaching(reporter);
	TestDeferredCanvasSkip(reporter);
	TestDeferredCanvasBitmapShaderNoLeak(reporter);
	TestDeferredCanvasBitmapSizeThreshold(reporter);
	}

	#include "TestClassDef.h"
	DEFINE_TESTCLASS("DeferredCanvas", TestDeferredCanvasClass, TestDeferredCanvas)