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

 /*
  * 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 "SkCanvas.h"
 #include "SkDrawable.h"
 #include "SkFont.h"
 #include "SkPictureRecorder.h"
 #include "SkReadBuffer.h"
 #include "SkRect.h"
 #include "SkStream.h"
 #include "SkWriteBuffer.h"
 #include "Test.h"

 class IntDrawable : public SkDrawable {
 public:
     IntDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
         : fA(a)
         , fB(b)
         , fC(c)
         , fD(d)
     {}

     void flatten(SkWriteBuffer& buffer) const override {
         buffer.writeUInt(fA);
         buffer.writeUInt(fB);
         buffer.writeUInt(fC);
         buffer.writeUInt(fD);
     }

     static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
         uint32_t a = buffer.readUInt();
         uint32_t b = buffer.readUInt();
         uint32_t c = buffer.readUInt();
         uint32_t d = buffer.readUInt();
         return sk_sp<IntDrawable>(new IntDrawable(a, b, c, d));
     }

     Factory getFactory() const override { return CreateProc; }

     uint32_t a() const { return fA; }
     uint32_t b() const { return fB; }
     uint32_t c() const { return fC; }
     uint32_t d() const { return fD; }

     const char* getTypeName() const override { return "IntDrawable"; }

 protected:
     SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
     void onDraw(SkCanvas*) override {}

 private:
     uint32_t fA;
     uint32_t fB;
     uint32_t fC;
     uint32_t fD;
 };

 class PaintDrawable : public SkDrawable {
 public:
     PaintDrawable(const SkPaint& paint)
         : fPaint(paint)
     {}

     void flatten(SkWriteBuffer& buffer) const override {
         buffer.writePaint(fPaint);
     }

     static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
         SkPaint paint;
         buffer.readPaint(&paint, nullptr);
         return sk_sp<PaintDrawable>(new PaintDrawable(paint));
     }

     Factory getFactory() const override { return CreateProc; }

     const SkPaint& paint() const { return fPaint; }

     const char* getTypeName() const override { return "PaintDrawable"; }

 protected:
     SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
     void onDraw(SkCanvas*) override {}

 private:
     SkPaint fPaint;
 };

 class CompoundDrawable : public SkDrawable {
 public:
     CompoundDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d, const SkPaint& paint)
         : fIntDrawable(new IntDrawable(a, b, c, d))
         , fPaintDrawable(new PaintDrawable(paint))
     {}

     CompoundDrawable(IntDrawable* intDrawable, PaintDrawable* paintDrawable)
         : fIntDrawable(SkRef(intDrawable))
         , fPaintDrawable(SkRef(paintDrawable))
     {}

     void flatten(SkWriteBuffer& buffer) const override {
         buffer.writeFlattenable(fIntDrawable.get());
         buffer.writeFlattenable(fPaintDrawable.get());
     }

     static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
         sk_sp<SkFlattenable> intDrawable(
                 buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
         SkASSERT(intDrawable);
         SkASSERT(!strcmp("IntDrawable", intDrawable->getTypeName()));

         sk_sp<SkFlattenable> paintDrawable(
                 buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
         SkASSERT(paintDrawable);
         SkASSERT(!strcmp("PaintDrawable", paintDrawable->getTypeName()));

         return sk_sp<CompoundDrawable>(new CompoundDrawable((IntDrawable*) intDrawable.get(),
                                                             (PaintDrawable*) paintDrawable.get()));
     }

     Factory getFactory() const override { return CreateProc; }

     IntDrawable* intDrawable() const { return fIntDrawable.get(); }
     PaintDrawable* paintDrawable() const { return fPaintDrawable.get(); }

     const char* getTypeName() const override { return "CompoundDrawable"; }

 protected:
     SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
     void onDraw(SkCanvas*) override {}

 private:
     sk_sp<IntDrawable>   fIntDrawable;
     sk_sp<PaintDrawable> fPaintDrawable;
 };

 class RootDrawable : public SkDrawable {
 public:
     RootDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d, const SkPaint& paint,
                    uint32_t e, uint32_t f, uint32_t g, uint32_t h, SkDrawable* drawable)
         : fCompoundDrawable(new CompoundDrawable(a, b, c, d, paint))
         , fIntDrawable(new IntDrawable(e, f, g, h))
         , fDrawable(SkRef(drawable))
     {}

     RootDrawable(CompoundDrawable* compoundDrawable, IntDrawable* intDrawable,
             SkDrawable* drawable)
         : fCompoundDrawable(SkRef(compoundDrawable))
         , fIntDrawable(SkRef(intDrawable))
         , fDrawable(SkRef(drawable))
     {}

     void flatten(SkWriteBuffer& buffer) const override {
         buffer.writeFlattenable(fCompoundDrawable.get());
         buffer.writeFlattenable(fIntDrawable.get());
         buffer.writeFlattenable(fDrawable.get());
     }

     static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
         sk_sp<SkFlattenable> compoundDrawable(
                 buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
         SkASSERT(compoundDrawable);
         SkASSERT(!strcmp("CompoundDrawable", compoundDrawable->getTypeName()));

         sk_sp<SkFlattenable> intDrawable(
                 buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
         SkASSERT(intDrawable);
         SkASSERT(!strcmp("IntDrawable", intDrawable->getTypeName()));

         sk_sp<SkFlattenable> drawable(
                 buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
         SkASSERT(drawable);

         return sk_sp<RootDrawable>(new RootDrawable((CompoundDrawable*) compoundDrawable.get(),
                                                     (IntDrawable*) intDrawable.get(),
                                                     (SkDrawable*) drawable.get()));
     }

     Factory getFactory() const override { return CreateProc; }

     CompoundDrawable* compoundDrawable() const { return fCompoundDrawable.get(); }
     IntDrawable* intDrawable() const { return fIntDrawable.get(); }
     SkDrawable* drawable() const { return fDrawable.get(); }

     const char* getTypeName() const override { return "RootDrawable"; }

 protected:
     SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
     void onDraw(SkCanvas*) override {}

 private:
     sk_sp<CompoundDrawable> fCompoundDrawable;
     sk_sp<IntDrawable>      fIntDrawable;
     sk_sp<SkDrawable>       fDrawable;
 };

 // Register these drawables for deserialization some time before main().
 static struct Initializer {
     Initializer() {
         SK_REGISTER_FLATTENABLE(IntDrawable);
         SK_REGISTER_FLATTENABLE(PaintDrawable);
         SK_REGISTER_FLATTENABLE(CompoundDrawable);
         SK_REGISTER_FLATTENABLE(RootDrawable);
     }
 } initializer;

 DEF_TEST(FlattenDrawable, r) {
     // Create and serialize the test drawable
     sk_sp<SkDrawable> drawable(new IntDrawable(1, 2, 3, 4));
     SkPaint paint;
     paint.setColor(SK_ColorBLUE);
     sk_sp<RootDrawable> root(new RootDrawable(5, 6, 7, 8, paint, 9, 10, 11, 12, drawable.get()));
     SkBinaryWriteBuffer writeBuffer;
     writeBuffer.writeFlattenable(root.get());

     // Copy the contents of the write buffer into a read buffer
     sk_sp<SkData> data = SkData::MakeUninitialized(writeBuffer.bytesWritten());
     writeBuffer.writeToMemory(data->writable_data());
     SkReadBuffer readBuffer(data->data(), data->size());

     // Deserialize and verify the drawable
     sk_sp<SkDrawable> out((SkDrawable*)readBuffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
     REPORTER_ASSERT(r, out);
     REPORTER_ASSERT(r, !strcmp("RootDrawable", out->getTypeName()));

     RootDrawable* rootOut = (RootDrawable*) out.get();
     REPORTER_ASSERT(r, 5 == rootOut->compoundDrawable()->intDrawable()->a());
     REPORTER_ASSERT(r, 6 == rootOut->compoundDrawable()->intDrawable()->b());
     REPORTER_ASSERT(r, 7 == rootOut->compoundDrawable()->intDrawable()->c());
     REPORTER_ASSERT(r, 8 == rootOut->compoundDrawable()->intDrawable()->d());
     REPORTER_ASSERT(r, SK_ColorBLUE ==
             rootOut->compoundDrawable()->paintDrawable()->paint().getColor());
     REPORTER_ASSERT(r, 9 == rootOut->intDrawable()->a());
     REPORTER_ASSERT(r, 10 == rootOut->intDrawable()->b());
     REPORTER_ASSERT(r, 11 == rootOut->intDrawable()->c());
     REPORTER_ASSERT(r, 12 == rootOut->intDrawable()->d());

     // Note that we can still recognize the generic drawable as an IntDrawable
     SkDrawable* generic = rootOut->drawable();
     REPORTER_ASSERT(r, !strcmp("IntDrawable", generic->getTypeName()));
     IntDrawable* integer = (IntDrawable*) generic;
     REPORTER_ASSERT(r, 1 == integer->a());
     REPORTER_ASSERT(r, 2 == integer->b());
     REPORTER_ASSERT(r, 3 == integer->c());
     REPORTER_ASSERT(r, 4 == integer->d());
 }

 DEF_TEST(FlattenRecordedDrawable, r) {
     // Record a set of canvas draw commands
     SkPictureRecorder recorder;
     SkCanvas* canvas = recorder.beginRecording(1000.0f, 1000.0f);
     SkPaint paint;
     paint.setColor(SK_ColorGREEN);
     canvas->drawPoint(42.0f, 17.0f, paint);
     paint.setColor(SK_ColorRED);
     canvas->drawPaint(paint);
     SkPaint textPaint;
     textPaint.setColor(SK_ColorBLUE);
     canvas->drawString("TEXT", 467.0f, 100.0f, SkFont(), textPaint);

     // Draw some drawables as well
     sk_sp<SkDrawable> drawable(new IntDrawable(1, 2, 3, 4));
     sk_sp<RootDrawable> root(new RootDrawable(5, 6, 7, 8, paint, 9, 10, 11, 12, drawable.get()));
     canvas->drawDrawable(root.get(), 747.0f, 242.0f);
     sk_sp<PaintDrawable> paintDrawable(new PaintDrawable(paint));
     canvas->drawDrawable(paintDrawable.get(), 500.0, 500.0f);
     sk_sp<CompoundDrawable> comDrawable(new CompoundDrawable(13, 14, 15, 16, textPaint));
     canvas->drawDrawable(comDrawable.get(), 10.0f, 10.0f);

     // Serialize the recorded drawable
     sk_sp<SkDrawable> recordedDrawable = recorder.finishRecordingAsDrawable();
     SkBinaryWriteBuffer writeBuffer;
     writeBuffer.writeFlattenable(recordedDrawable.get());

     // Copy the contents of the write buffer into a read buffer
     sk_sp<SkData> data = SkData::MakeUninitialized(writeBuffer.bytesWritten());
     writeBuffer.writeToMemory(data->writable_data());
     SkReadBuffer readBuffer(data->data(), data->size());

     // Deserialize and verify the drawable
     sk_sp<SkDrawable> out((SkDrawable*)readBuffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
     REPORTER_ASSERT(r, out);
     REPORTER_ASSERT(r, !strcmp("SkRecordedDrawable", out->getTypeName()));
 }

 // be sure these constructs compile, don't assert, and return null
 DEF_TEST(Flattenable_EmptyDeserialze, reporter) {
     auto data = SkData::MakeEmpty();

     #define test(name)  REPORTER_ASSERT(reporter, !name::Deserialize(data->data(), data->size()))
     test(SkPathEffect);
     test(SkMaskFilter);
     test(SkShaderBase); // todo: make this just be shader!
     test(SkColorFilter);
     test(SkImageFilter);
     test(SkDrawLooper);
     #undef test
 }
	/*
	* 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 "SkCanvas.h"
	#include "SkDrawable.h"
	#include "SkFont.h"
	#include "SkPictureRecorder.h"
	#include "SkReadBuffer.h"
	#include "SkRect.h"
	#include "SkStream.h"
	#include "SkWriteBuffer.h"
	#include "Test.h"

	class IntDrawable : public SkDrawable {
	public:
	IntDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d)
	: fA(a)
	, fB(b)
	, fC(c)
	, fD(d)
	{}

	void flatten(SkWriteBuffer& buffer) const override {
	buffer.writeUInt(fA);
	buffer.writeUInt(fB);
	buffer.writeUInt(fC);
	buffer.writeUInt(fD);
	}

	static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
	uint32_t a = buffer.readUInt();
	uint32_t b = buffer.readUInt();
	uint32_t c = buffer.readUInt();
	uint32_t d = buffer.readUInt();
	return sk_sp<IntDrawable>(new IntDrawable(a, b, c, d));
	}

	Factory getFactory() const override { return CreateProc; }

	uint32_t a() const { return fA; }
	uint32_t b() const { return fB; }
	uint32_t c() const { return fC; }
	uint32_t d() const { return fD; }

	const char* getTypeName() const override { return "IntDrawable"; }

	protected:
	SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
	void onDraw(SkCanvas*) override {}

	private:
	uint32_t fA;
	uint32_t fB;
	uint32_t fC;
	uint32_t fD;
	};

	class PaintDrawable : public SkDrawable {
	public:
	PaintDrawable(const SkPaint& paint)
	: fPaint(paint)
	{}

	void flatten(SkWriteBuffer& buffer) const override {
	buffer.writePaint(fPaint);
	}

	static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
	SkPaint paint;
	buffer.readPaint(&paint, nullptr);
	return sk_sp<PaintDrawable>(new PaintDrawable(paint));
	}

	Factory getFactory() const override { return CreateProc; }

	const SkPaint& paint() const { return fPaint; }

	const char* getTypeName() const override { return "PaintDrawable"; }

	protected:
	SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
	void onDraw(SkCanvas*) override {}

	private:
	SkPaint fPaint;
	};

	class CompoundDrawable : public SkDrawable {
	public:
	CompoundDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d, const SkPaint& paint)
	: fIntDrawable(new IntDrawable(a, b, c, d))
	, fPaintDrawable(new PaintDrawable(paint))
	{}

	CompoundDrawable(IntDrawable* intDrawable, PaintDrawable* paintDrawable)
	: fIntDrawable(SkRef(intDrawable))
	, fPaintDrawable(SkRef(paintDrawable))
	{}

	void flatten(SkWriteBuffer& buffer) const override {
	buffer.writeFlattenable(fIntDrawable.get());
	buffer.writeFlattenable(fPaintDrawable.get());
	}

	static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
	sk_sp<SkFlattenable> intDrawable(
	buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	SkASSERT(intDrawable);
	SkASSERT(!strcmp("IntDrawable", intDrawable->getTypeName()));

	sk_sp<SkFlattenable> paintDrawable(
	buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	SkASSERT(paintDrawable);
	SkASSERT(!strcmp("PaintDrawable", paintDrawable->getTypeName()));

	return sk_sp<CompoundDrawable>(new CompoundDrawable((IntDrawable*) intDrawable.get(),
	(PaintDrawable*) paintDrawable.get()));
	}

	Factory getFactory() const override { return CreateProc; }

	IntDrawable* intDrawable() const { return fIntDrawable.get(); }
	PaintDrawable* paintDrawable() const { return fPaintDrawable.get(); }

	const char* getTypeName() const override { return "CompoundDrawable"; }

	protected:
	SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
	void onDraw(SkCanvas*) override {}

	private:
	sk_sp<IntDrawable> fIntDrawable;
	sk_sp<PaintDrawable> fPaintDrawable;
	};

	class RootDrawable : public SkDrawable {
	public:
	RootDrawable(uint32_t a, uint32_t b, uint32_t c, uint32_t d, const SkPaint& paint,
	uint32_t e, uint32_t f, uint32_t g, uint32_t h, SkDrawable* drawable)
	: fCompoundDrawable(new CompoundDrawable(a, b, c, d, paint))
	, fIntDrawable(new IntDrawable(e, f, g, h))
	, fDrawable(SkRef(drawable))
	{}

	RootDrawable(CompoundDrawable* compoundDrawable, IntDrawable* intDrawable,
	SkDrawable* drawable)
	: fCompoundDrawable(SkRef(compoundDrawable))
	, fIntDrawable(SkRef(intDrawable))
	, fDrawable(SkRef(drawable))
	{}

	void flatten(SkWriteBuffer& buffer) const override {
	buffer.writeFlattenable(fCompoundDrawable.get());
	buffer.writeFlattenable(fIntDrawable.get());
	buffer.writeFlattenable(fDrawable.get());
	}

	static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) {
	sk_sp<SkFlattenable> compoundDrawable(
	buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	SkASSERT(compoundDrawable);
	SkASSERT(!strcmp("CompoundDrawable", compoundDrawable->getTypeName()));

	sk_sp<SkFlattenable> intDrawable(
	buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	SkASSERT(intDrawable);
	SkASSERT(!strcmp("IntDrawable", intDrawable->getTypeName()));

	sk_sp<SkFlattenable> drawable(
	buffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	SkASSERT(drawable);

	return sk_sp<RootDrawable>(new RootDrawable((CompoundDrawable*) compoundDrawable.get(),
	(IntDrawable*) intDrawable.get(),
	(SkDrawable*) drawable.get()));
	}

	Factory getFactory() const override { return CreateProc; }

	CompoundDrawable* compoundDrawable() const { return fCompoundDrawable.get(); }
	IntDrawable* intDrawable() const { return fIntDrawable.get(); }
	SkDrawable* drawable() const { return fDrawable.get(); }

	const char* getTypeName() const override { return "RootDrawable"; }

	protected:
	SkRect onGetBounds() override { return SkRect::MakeEmpty(); }
	void onDraw(SkCanvas*) override {}

	private:
	sk_sp<CompoundDrawable> fCompoundDrawable;
	sk_sp<IntDrawable> fIntDrawable;
	sk_sp<SkDrawable> fDrawable;
	};

	// Register these drawables for deserialization some time before main().
	static struct Initializer {
	Initializer() {
	SK_REGISTER_FLATTENABLE(IntDrawable);
	SK_REGISTER_FLATTENABLE(PaintDrawable);
	SK_REGISTER_FLATTENABLE(CompoundDrawable);
	SK_REGISTER_FLATTENABLE(RootDrawable);
	}
	} initializer;

	DEF_TEST(FlattenDrawable, r) {
	// Create and serialize the test drawable
	sk_sp<SkDrawable> drawable(new IntDrawable(1, 2, 3, 4));
	SkPaint paint;
	paint.setColor(SK_ColorBLUE);
	sk_sp<RootDrawable> root(new RootDrawable(5, 6, 7, 8, paint, 9, 10, 11, 12, drawable.get()));
	SkBinaryWriteBuffer writeBuffer;
	writeBuffer.writeFlattenable(root.get());

	// Copy the contents of the write buffer into a read buffer
	sk_sp<SkData> data = SkData::MakeUninitialized(writeBuffer.bytesWritten());
	writeBuffer.writeToMemory(data->writable_data());
	SkReadBuffer readBuffer(data->data(), data->size());

	// Deserialize and verify the drawable
	sk_sp<SkDrawable> out((SkDrawable*)readBuffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	REPORTER_ASSERT(r, out);
	REPORTER_ASSERT(r, !strcmp("RootDrawable", out->getTypeName()));

	RootDrawable* rootOut = (RootDrawable*) out.get();
	REPORTER_ASSERT(r, 5 == rootOut->compoundDrawable()->intDrawable()->a());
	REPORTER_ASSERT(r, 6 == rootOut->compoundDrawable()->intDrawable()->b());
	REPORTER_ASSERT(r, 7 == rootOut->compoundDrawable()->intDrawable()->c());
	REPORTER_ASSERT(r, 8 == rootOut->compoundDrawable()->intDrawable()->d());
	REPORTER_ASSERT(r, SK_ColorBLUE ==
	rootOut->compoundDrawable()->paintDrawable()->paint().getColor());
	REPORTER_ASSERT(r, 9 == rootOut->intDrawable()->a());
	REPORTER_ASSERT(r, 10 == rootOut->intDrawable()->b());
	REPORTER_ASSERT(r, 11 == rootOut->intDrawable()->c());
	REPORTER_ASSERT(r, 12 == rootOut->intDrawable()->d());

	// Note that we can still recognize the generic drawable as an IntDrawable
	SkDrawable* generic = rootOut->drawable();
	REPORTER_ASSERT(r, !strcmp("IntDrawable", generic->getTypeName()));
	IntDrawable* integer = (IntDrawable*) generic;
	REPORTER_ASSERT(r, 1 == integer->a());
	REPORTER_ASSERT(r, 2 == integer->b());
	REPORTER_ASSERT(r, 3 == integer->c());
	REPORTER_ASSERT(r, 4 == integer->d());
	}

	DEF_TEST(FlattenRecordedDrawable, r) {
	// Record a set of canvas draw commands
	SkPictureRecorder recorder;
	SkCanvas* canvas = recorder.beginRecording(1000.0f, 1000.0f);
	SkPaint paint;
	paint.setColor(SK_ColorGREEN);
	canvas->drawPoint(42.0f, 17.0f, paint);
	paint.setColor(SK_ColorRED);
	canvas->drawPaint(paint);
	SkPaint textPaint;
	textPaint.setColor(SK_ColorBLUE);
	canvas->drawString("TEXT", 467.0f, 100.0f, SkFont(), textPaint);

	// Draw some drawables as well
	sk_sp<SkDrawable> drawable(new IntDrawable(1, 2, 3, 4));
	sk_sp<RootDrawable> root(new RootDrawable(5, 6, 7, 8, paint, 9, 10, 11, 12, drawable.get()));
	canvas->drawDrawable(root.get(), 747.0f, 242.0f);
	sk_sp<PaintDrawable> paintDrawable(new PaintDrawable(paint));
	canvas->drawDrawable(paintDrawable.get(), 500.0, 500.0f);
	sk_sp<CompoundDrawable> comDrawable(new CompoundDrawable(13, 14, 15, 16, textPaint));
	canvas->drawDrawable(comDrawable.get(), 10.0f, 10.0f);

	// Serialize the recorded drawable
	sk_sp<SkDrawable> recordedDrawable = recorder.finishRecordingAsDrawable();
	SkBinaryWriteBuffer writeBuffer;
	writeBuffer.writeFlattenable(recordedDrawable.get());

	// Copy the contents of the write buffer into a read buffer
	sk_sp<SkData> data = SkData::MakeUninitialized(writeBuffer.bytesWritten());
	writeBuffer.writeToMemory(data->writable_data());
	SkReadBuffer readBuffer(data->data(), data->size());

	// Deserialize and verify the drawable
	sk_sp<SkDrawable> out((SkDrawable*)readBuffer.readFlattenable(SkFlattenable::kSkDrawable_Type));
	REPORTER_ASSERT(r, out);
	REPORTER_ASSERT(r, !strcmp("SkRecordedDrawable", out->getTypeName()));
	}

	// be sure these constructs compile, don't assert, and return null
	DEF_TEST(Flattenable_EmptyDeserialze, reporter) {
	auto data = SkData::MakeEmpty();

	#define test(name) REPORTER_ASSERT(reporter, !name::Deserialize(data->data(), data->size()))
	test(SkPathEffect);
	test(SkMaskFilter);
	test(SkShaderBase); // todo: make this just be shader!
	test(SkColorFilter);
	test(SkImageFilter);
	test(SkDrawLooper);
	#undef test
	}