Add GM to repro crbug.com/472795

src/effects/SkBitmapSource.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapSource.h"
 #include "SkDevice.h"
 #include "SkCanvas.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkValidationUtils.h"
 
 SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap)
   : INHERITED(0, 0)
   , fBitmap(bitmap)
   , fSrcRect(SkRect::MakeWH(SkIntToScalar(bitmap.width()),
                             SkIntToScalar(bitmap.height())))
   , fDstRect(fSrcRect)
-{}
+  , fFilterQuality(kHigh_SkFilterQuality) {
+}
 
-SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap, const SkRect& srcRect, const SkRect& dstRect)
+SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap, 
+                               const SkRect& srcRect, const SkRect& dstRect,
+                               SkFilterQuality filterQuality)
   : INHERITED(0, 0)
   , fBitmap(bitmap)
   , fSrcRect(srcRect)
-  , fDstRect(dstRect) {}
+  , fDstRect(dstRect)
+  , fFilterQuality(filterQuality) {
+}
 
 SkFlattenable* SkBitmapSource::CreateProc(SkReadBuffer& buffer) {
     SkRect src, dst;
     buffer.readRect(&src);
     buffer.readRect(&dst);
     SkBitmap bitmap;
     if (!buffer.readBitmap(&bitmap)) {
         return NULL;
     }
     return SkBitmapSource::Create(bitmap, src, dst);
@@ skipping 26 matching lines @@
     SkCanvas canvas(device.get());
     SkPaint paint;
 
     // Subtract off the integer component of the translation (will be applied in loc, below).
     dstRect.offset(-SkIntToScalar(dstIRect.fLeft), -SkIntToScalar(dstIRect.fTop));
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     // FIXME: this probably shouldn't be necessary, but drawBitmapRectToRect asserts
     // None filtering when it's translate-only
     paint.setFilterQuality(
         fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ?
-               kNone_SkFilterQuality : kHigh_SkFilterQuality);
+               kNone_SkFilterQuality : fFilterQuality);
     canvas.drawBitmapRectToRect(fBitmap, &fSrcRect, dstRect, &paint);
 
     *result = device.get()->accessBitmap(false);
     offset->fX = dstIRect.fLeft;
     offset->fY = dstIRect.fTop;
+
     return true;
 }
 
 void SkBitmapSource::computeFastBounds(const SkRect&, SkRect* dst) const {
     *dst = fDstRect;
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkBitmapSource::toString(SkString* str) const {
     str->appendf("SkBitmapSource: (");
     str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
                  fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     str->appendf("bitmap: (%d,%d)",
                  fBitmap.width(), fBitmap.height());
     str->append(")");
 }
 #endif