remove SkImage::applyFilter() -- unused, can always re-add later

gm/spritebitmap.cpp

Index: gm/spritebitmap.cpp
diff --git a/gm/spritebitmap.cpp b/gm/spritebitmap.cpp
index 4f221d49fc71d808d0d932bb30d4973b174f4d52..6c438fad11da5b90957678ac9fae2e6af4f2876d 100644
--- a/gm/spritebitmap.cpp
+++ b/gm/spritebitmap.cpp
@@ -87,113 +87,3 @@ private:
     typedef GM INHERITED;
 };
 DEF_GM( return new SpriteBitmapGM; )
-
-///////////////////////////////////////////////////////////////////////////////////////////////////
-
-#include "SkColorFilterImageFilter.h"
-#include "SkModeColorFilter.h"
-#include "SkMorphologyImageFilter.h"
-#include "SkOffsetImageFilter.h"
-
-static SkImage* make_image(SkCanvas* rootCanvas) {
-    SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
-    SkAutoTUnref<SkSurface> surface(rootCanvas->newSurface(info));
-    if (!surface) {
-        surface.reset(SkSurface::NewRaster(info));
-    }
-
-    SkPaint paint;
-    paint.setAntiAlias(true);
-    paint.setColor(SK_ColorRED);
-    surface->getCanvas()->drawCircle(50, 50, 50, paint);
-    return surface->newImageSnapshot();
-}
-
-static void show_image(SkCanvas* canvas, SkImage* image, const SkIPoint& offset) {
-    SkScalar x = SkIntToScalar(offset.x());
-    SkScalar y = SkIntToScalar(offset.y());
-
-    SkPaint paint;
-    paint.setStyle(SkPaint::kStroke_Style);
-
-    SkRect r = SkRect::MakeIWH(image->width(), image->height());
-    r.offset(x, y);
-    // get on pixel-centers to make the hairline land on a numerical stable boundary
-    r.outset(SK_ScalarHalf, SK_ScalarHalf);
-    canvas->drawRect(r, paint);
-
-    canvas->drawImage(image, x, y, nullptr);
-}
-
-typedef SkImageFilter* (*ImageFilterFactory)();
-
-// +[]{...} did not work on windows (VS)
-// (ImageFilterFactory)[]{...} did not work on linux (gcc)
-// hence this cast function
-template <typename T> ImageFilterFactory IFCCast(T arg) { return arg; }
-
-// We expect that applying the filter will keep us in the same domain (raster or gpu)
-static void check_same_domain(SkImage* a, SkImage* b) {
-    SkASSERT(a->isTextureBacked() == b->isTextureBacked());
-}
-
-/**
- *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
- */
-class ApplyFilterGM : public skiagm::GM {
-public:
-    ApplyFilterGM() {}
-
-protected:
-    SkString onShortName() override {
-        return SkString("apply-filter");
-    }
-
-    SkISize onISize() override {
-        return SkISize::Make(780, 780);
-    }
-
-    void onDraw(SkCanvas* canvas) override {
-        SkAutoTUnref<SkImage> image0(make_image(canvas));
-
-        const ImageFilterFactory factories[] = {
-            IFCCast([]{ return SkBlurImageFilter::Create(8, 8); }),
-            IFCCast([]{ SkAutoTUnref<SkColorFilter> cf(SkModeColorFilter::Create(SK_ColorBLUE,
-                                                                     SkXfermode::kSrcIn_Mode));
-                 return SkColorFilterImageFilter::Create(cf);
-            }),
-            IFCCast([]{ return SkDilateImageFilter::Create(8, 8); }),
-            IFCCast([]{ return SkErodeImageFilter::Create(8, 8); }),
-            IFCCast([]{ return SkOffsetImageFilter::Create(8, 8); }),
-        };
-
-        const SkScalar spacer = image0->width() * 3.0f / 2;
-
-        for (auto&& factory : factories) {
-            SkAutoTUnref<SkImageFilter> filter(factory());
-
-            SkIPoint offset1, offset2;
-            SkAutoTUnref<SkImage> image1(image0->applyFilter(filter, &offset1, true));
-            SkAutoTUnref<SkImage> image2(image0->applyFilter(filter, &offset2, false));
-
-            check_same_domain(image0, image1);
-            check_same_domain(image0, image2);
-
-            canvas->save();
-            canvas->translate(30, 30);
-            show_image(canvas, image0, SkIPoint::Make(0, 0));   // original
-            canvas->translate(spacer, 0);
-            show_image(canvas, image1, offset1);                // snug
-            canvas->translate(spacer, 0);
-            show_image(canvas, image2, offset2);                // not snug
-
-            canvas->restore();
-
-            canvas->translate(0, spacer);
-        }
-    }
-
-private:
-    typedef GM INHERITED;
-};
-DEF_GM( return new ApplyFilterGM; )