Fix for partially-specified crop rects.

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 1121 matching lines @@
     SkAutoTUnref<SkImageFilter> offsetFilter(SkOffsetImageFilter::Create(0, 0, NULL, &cropRect));
     SkAutoTUnref<SkImageFilter> blurFilter(makeBlur());
     SkAutoTUnref<SkImageFilter> composedFilter(SkComposeImageFilter::Create(blurFilter, offsetFilter.get()));
     SkBitmap result;
     SkIPoint offset;
     SkImageFilter::Context ctx(SkMatrix::I(), SkIRect::MakeLargest(), NULL);
     REPORTER_ASSERT(reporter, composedFilter->filterImage(&proxy, bitmap, ctx, &result, &offset));
     REPORTER_ASSERT(reporter, offset.fX == 1 && offset.fY == 0);
 }
 
+DEF_TEST(PartialCropRect, reporter) {
+    SkBitmap bitmap;
+    bitmap.allocN32Pixels(100, 100);
+    bitmap.eraseARGB(0, 0, 0, 0);
+    const SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
+    SkBitmapDevice device(bitmap, props);
+    SkImageFilter::Proxy proxy(&device);
+
+    SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(100, 0, 20, 30),
+        SkImageFilter::CropRect::kHasRight_CropEdge | SkImageFilter::CropRect::kHasBottom_CropEdge);
+    SkAutoTUnref<SkImageFilter> filter(make_grayscale(NULL, &cropRect));
+    SkBitmap result;
+    SkIPoint offset;
+    SkImageFilter::Context ctx(SkMatrix::I(), SkIRect::MakeLargest(), NULL);
+    REPORTER_ASSERT(reporter, filter->filterImage(&proxy, bitmap, ctx, &result, &offset));
+    REPORTER_ASSERT(reporter, offset.fX == 0);
+    REPORTER_ASSERT(reporter, offset.fY == 0);
+    REPORTER_ASSERT(reporter, result.width() == 20);
+    REPORTER_ASSERT(reporter, result.height() == 30);
+}
+
 #if SK_SUPPORT_GPU
 
 DEF_GPUTEST(ImageFilterCropRectGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     if (NULL == context) {
         return;
     }
     const SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
 
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
@@ skipping 54 matching lines @@
                                                          SkSurface::kNo_Budgeted,
                                                          SkImageInfo::MakeN32Premul(1, 1),
                                                          0,
                                                          &props,
                                                          SkGpuDevice::kUninit_InitContents));
     SkImageFilter::Proxy proxy(device);
 
     test_negative_blur_sigma(&proxy, reporter);
 }
 #endif