Upstreaming DropShadowImageFilter into skia, from Blink

gm/imagefiltersbase.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkShader.h"
 
 #include "SkBlurImageFilter.h"
 #include "SkColorFilterImageFilter.h"
+#include "SkDropShadowImageFilter.h"
 #include "SkTestImageFilters.h"
 
 class FailImageFilter : public SkImageFilter {
 public:
     FailImageFilter() : INHERITED(0) {}
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(FailImageFilter)
 protected:
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) {
@@ skipping 123 matching lines @@
 class ImageFiltersBaseGM : public skiagm::GM {
 public:
     ImageFiltersBaseGM () {}
 
 protected:
 
     virtual SkString onShortName() {
         return SkString("imagefiltersbase");
     }
 
-    virtual SkISize onISize() { return SkISize::Make(700, 460); }
+    virtual SkISize onISize() { return SkISize::Make(700, 500); }
 
     void draw_frame(SkCanvas* canvas, const SkRect& r) {
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setColor(SK_ColorRED);
         canvas->drawRect(r, paint);
     }
 
     virtual uint32_t onGetFlags() const {
         // Because of the use of drawSprite, this test is excluded
@@ skipping 12 matching lines @@
         };
 
         SkColorFilter* cf = SkColorFilter::CreateModeFilter(SK_ColorRED,
                                                      SkXfermode::kSrcIn_Mode);
         SkImageFilter* filters[] = {
             NULL,
             new IdentityImageFilter,
             new FailImageFilter,
             SkColorFilterImageFilter::Create(cf),
             new SkBlurImageFilter(12.0f, 0.0f),
+            new SkDropShadowImageFilter(10.0f, 5.0f, 3.0f, SK_ColorBLUE),
         };
         cf->unref();
 
         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
         SkScalar MARGIN = SkIntToScalar(16);
         SkScalar DX = r.width() + MARGIN;
         SkScalar DY = r.height() + MARGIN;
 
         canvas->translate(MARGIN, MARGIN);
         for (size_t i = 0; i < SK_ARRAY_COUNT(drawProc); ++i) {
@@ skipping 14 matching lines @@
     }
 
 private:
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new ImageFiltersBaseGM; }
 static skiagm::GMRegistry reg(MyFactory);