Intersect SkPictureImageFilter bounds against clip bounds.

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 "SkBitmap.h"
 #include "SkBitmapDevice.h"
 #include "SkBitmapSource.h"
@@ skipping 549 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(ImageFilterPictureImageFilter, reporter) {
+DEF_TEST(ImageFilterCrossProcessPictureImageFilter, 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());
 
@@ skipping 38 matching lines @@
     crossProcessCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(1, 1)), redPaintWithFilter);
     SkAutoTUnref<SkPicture> crossProcessPicture(crossProcessRecorder.endRecording());
 
     canvas.clear(0x0);
     canvas.drawPicture(crossProcessPicture);
     pixel = *bitmap.getAddr32(0, 0);
     // The result here should not be green, since the filter draws nothing.
     REPORTER_ASSERT(reporter, pixel != SK_ColorGREEN);
 }
 
+DEF_TEST(ImageFilterClippedPictureImageFilter, 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());
+
+    SkAutoTUnref<SkImageFilter> imageFilter(
+        SkPictureImageFilter::Create(picture.get()));
+
+    SkBitmap result;
+    SkIPoint offset;
+    SkImageFilter::Context ctx(SkMatrix::I(), SkIRect::MakeXYWH(1, 1, 1, 1), NULL);
+    SkBitmap bitmap;
+    bitmap.allocN32Pixels(2, 2);
+    SkBitmapDevice device(bitmap);
+    SkDeviceImageFilterProxy proxy(&device);
+    REPORTER_ASSERT(reporter, !imageFilter->filterImage(&proxy, bitmap, ctx, &result, &offset));
+}
+
 DEF_TEST(ImageFilterEmptySaveLayer, 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);
 
     SkRTreeFactory factory;
@@ skipping 185 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