Allow SkPictureImageFilter to be serialized when not run cross-process.

tests/ImageFilterTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBicubicImageFilter.h"
 #include "SkBitmap.h"
 #include "SkBitmapDevice.h"
 #include "SkBitmapSource.h"
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
 #include "SkColorFilterImageFilter.h"
 #include "SkColorMatrixFilter.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDisplacementMapEffect.h"
 #include "SkDropShadowImageFilter.h"
 #include "SkFlattenableBuffers.h"
+#include "SkFlattenableSerialization.h"
 #include "SkGradientShader.h"
 #include "SkLightingImageFilter.h"
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkMatrixImageFilter.h"
 #include "SkMergeImageFilter.h"
 #include "SkMorphologyImageFilter.h"
 #include "SkOffsetImageFilter.h"
 #include "SkPicture.h"
+#include "SkPictureImageFilter.h"
 #include "SkPictureRecorder.h"
 #include "SkRect.h"
 #include "SkTileImageFilter.h"
 #include "SkXfermodeImageFilter.h"
 #include "Test.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContextFactory.h"
 #include "SkGpuDevice.h"
 #endif
@@ skipping 436 matching lines @@
     recordingCanvas->save();
     recordingCanvas->scale(SkIntToScalar(10), SkIntToScalar(10));
     recordingCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(100, 100)), solidPaint);
     recordingCanvas->restore(); // scale
     recordingCanvas->restore(); // saveLayer
     SkAutoTUnref<SkPicture> picture(recorder.endRecording());
 
     canvas.drawPicture(*picture);
 }
 
+DEF_TEST(ImageFilterPictureImageFilterTest, reporter) {
+
+    SkRTreeFactory factory;
+    SkPictureRecorder recorder;
+    SkCanvas* recordingCanvas = recorder.beginRecording(1, 1, &factory, 0);
+
+    // Create an SkPicture which simply draws a green 1x1 rectangle.
+    SkPaint greenPaint;
+    greenPaint.setColor(SK_ColorGREEN);
+    recordingCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(1, 1)), greenPaint);
+    SkAutoTUnref<SkPicture> picture(recorder.endRecording());
+
+    // Wrap that SkPicture in an SkPictureImageFilter.
+    SkAutoTUnref<SkImageFilter> imageFilter(
+        SkPictureImageFilter::Create(picture.get()));
+
+    // Check that SkPictureImageFilter successfully serializes its contained
+    // SkPicture when not in cross-process mode.
+    SkPaint paint;
+    paint.setImageFilter(imageFilter.get());
+    SkPictureRecorder outerRecorder;
+    SkCanvas* outerCanvas = outerRecorder.beginRecording(1, 1, &factory, 0);
+    SkPaint redPaintWithFilter;
+    redPaintWithFilter.setColor(SK_ColorRED);
+    redPaintWithFilter.setImageFilter(imageFilter.get());
+    outerCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(1, 1)), redPaintWithFilter);
+    SkAutoTUnref<SkPicture> outerPicture(outerRecorder.endRecording());
+
+    SkBitmap bitmap;
+    bitmap.allocN32Pixels(1, 1);
+    SkBitmapDevice device(bitmap);
+    SkCanvas canvas(&device);
+
+    // The result here should be green, since the filter 
+    canvas.clear(0x0);
+    canvas.drawPicture(*outerPicture);
+    uint32_t pixel = *bitmap.getAddr32(0, 0);
+    REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
+
+    // Check that, for now, SkPictureImageFilter does not serialize or
+    // deserialize its contained picture when the filter is serialized 
+    // cross-process. Do this by "laundering" it through SkValidatingReadBuffer.
+    SkAutoTUnref<SkData> data(SkValidatingSerializeFlattenable(imageFilter.get()));
+    SkFlattenable* flattenable = SkValidatingDeserializeFlattenable(
+        data->data(), data->size(), SkImageFilter::GetFlattenableType());
+    SkImageFilter* unflattenedFilter = static_cast<SkImageFilter*>(flattenable);
+
+    redPaintWithFilter.setImageFilter(unflattenedFilter);
+    SkPictureRecorder crossProcessRecorder;
+    SkCanvas* crossProcessCanvas = crossProcessRecorder.beginRecording(1, 1, &factory, 0);
+    crossProcessCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(1, 1)), redPaintWithFilter);
+    SkAutoTUnref<SkPicture> crossProcessPicture(crossProcessRecorder.endRecording());
+
+    canvas.clear(SK_ColorBLUE);
+    canvas.drawPicture(*crossProcessPicture);
+    pixel = *bitmap.getAddr32(0, 0);
+    // The result here should be the canvas background (blue), since the filter draws nothing.
+    REPORTER_ASSERT(reporter, pixel == SK_ColorBLUE);
+}
+
 DEF_TEST(ImageFilterEmptySaveLayerTest, reporter) {
 
     // Even when there's an empty saveLayer()/restore(), ensure that an image
     // filter or color filter which affects transparent black still draws.
 
     SkBitmap bitmap;
     bitmap.allocN32Pixels(10, 10);
     SkBitmapDevice device(bitmap);
     SkCanvas canvas(&device);
 
@@ skipping 186 matching lines @@
 }
 
 DEF_GPUTEST(XfermodeImageFilterCroppedInputGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkImageInfo::MakeN32Premul(1, 1),
                                                          0));
     test_xfermode_cropped_input(device, reporter);
 }
 #endif