Add toString methods to SkImageFilter-derived classes

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 37 matching lines @@
     MatrixTestImageFilter(skiatest::Reporter* reporter, const SkMatrix& expectedMatrix)
       : SkImageFilter(0, NULL), fReporter(reporter), fExpectedMatrix(expectedMatrix) {
     }
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context& ctx,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE {
         REPORTER_ASSERT(fReporter, ctx.ctm() == fExpectedMatrix);
         return true;
     }
 
+    SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(MatrixTestImageFilter)
 
 protected:
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         this->INHERITED::flatten(buffer);
         buffer.writeFunctionPtr(fReporter);
         buffer.writeMatrix(fExpectedMatrix);
     }
 
 private:
     skiatest::Reporter* fReporter;
     SkMatrix fExpectedMatrix;
 
     typedef SkImageFilter INHERITED;
 };
 
 }
 
 SkFlattenable* MatrixTestImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     skiatest::Reporter* reporter = (skiatest::Reporter*)buffer.readFunctionPtr();
     SkMatrix matrix;
     buffer.readMatrix(&matrix);
     return SkNEW_ARGS(MatrixTestImageFilter, (reporter, matrix));
 }
 
+#ifndef SK_IGNORE_TO_STRING
+void MatrixTestImageFilter::toString(SkString* str) const {
+    str->appendf("MatrixTestImageFilter: (");
+    str->append(")");
+}
+#endif
+
 static void make_small_bitmap(SkBitmap& bitmap) {
     bitmap.allocN32Pixels(kBitmapSize, kBitmapSize);
     SkCanvas canvas(bitmap);
     canvas.clear(0x00000000);
     SkPaint darkPaint;
     darkPaint.setColor(0xFF804020);
     SkPaint lightPaint;
     lightPaint.setColor(0xFF244484);
     const int i = kBitmapSize / 4;
     for (int y = 0; y < kBitmapSize; y += i) {
@@ skipping 994 matching lines @@
 
 DEF_GPUTEST(TestNegativeBlurSigmaGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkImageInfo::MakeN32Premul(1, 1),
                                                          gProps,
                                                          0));
     test_negative_blur_sigma(device, reporter);
 }
 #endif