remove dead mipmap code from SkBitmap

gm/scalebitmap.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 "gm.h"
-
-#include "SkImageDecoder.h"
-#include "SkStream.h"
-
-class ScaleBitmapGM : public skiagm::GM {
-
-public:
-
-    ScaleBitmapGM(const char filename[], float scale)
-        : fFilename(filename), fScale(scale)
-    {
-        this->setBGColor(0xFFDDDDDD);
-        fName.printf("scalebitmap_%s_%f", filename, scale);
-
-        SkString path(skiagm::GM::gResourcePath);
-        path.append("/");
-        path.append(fFilename);
-
-        SkImageDecoder *codec = NULL;
-        SkFILEStream stream(path.c_str());
-        if (stream.isValid()) {
-            codec = SkImageDecoder::Factory(&stream);
-        }
-        if (codec) {
-            stream.rewind();
-            codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config,
-                SkImageDecoder::kDecodePixels_Mode);
-            SkDELETE(codec);
-        } else {
-            fBM.allocN32Pixels(1, 1);
-            *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
-        }
-        fSize = fBM.height();
-    }
-
-protected:
-
-
-    SkBitmap    fBM;
-    SkString    fName;
-    SkString    fFilename;
-    int         fSize;
-    float       fScale;
-
-
-    virtual SkString onShortName() SK_OVERRIDE {
-        return fName;
-    }
-
-    virtual SkISize onISize() SK_OVERRIDE {
-        return SkISize::Make(fBM.width() * fScale, fBM.height() * fScale);
-    }
-
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        SkBitmap dst;
-        dst.allocN32Pixels(fBM.width() * fScale, fBM.height() * fScale);
-        fBM.scale(&dst);
-
-        canvas->drawBitmap(dst, 0, 0);
-    }
-
-private:
-    typedef skiagm::GM INHERITED;
-};
-
-class ScaleBitmapMipmapGM: public ScaleBitmapGM {
-    SkMatrix fMatrix;
-
-public:
-    ScaleBitmapMipmapGM(const char filename[], float scale)
-        : INHERITED(filename, scale)
-    {
-        fName.printf("scalebitmap_mipmap_%s_%f", filename, scale);
-        fBM.buildMipMap();
-        fMatrix.setScale(scale, scale);
-    }
-protected:
-    virtual void onDraw(SkCanvas *canvas) SK_OVERRIDE {
-        SkPaint paint;
-
-        paint.setFilterBitmap(true);
-        canvas->drawBitmapMatrix(fBM, fMatrix, &paint);
-    }
-private:
-     typedef ScaleBitmapGM INHERITED;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-DEF_GM( return new ScaleBitmapGM("mandrill_128.png", 2); )
-DEF_GM( return new ScaleBitmapGM("mandrill_64.png", 4); )
-DEF_GM( return new ScaleBitmapGM("mandrill_32.png", 8); )
-DEF_GM( return new ScaleBitmapGM("mandrill_16.png", 16); )
-
-DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.5f); )
-DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.25f); )
-DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.125f); )
-DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.0625f); )
-
-DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.5f); )
-DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.25f); )
-DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.125f); )
-DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.0625f); )