Handling large jpegs in CPU raster - downsample to display res and 565

src/image/SkImage_Raster.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 51 matching lines @@
         }
         return true;
     }
 
     SkImage_Raster(const SkImageInfo&, SkData*, size_t rb, SkColorTable*);
     virtual ~SkImage_Raster();
 
     bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY) const override;
     const void* onPeekPixels(SkImageInfo*, size_t* /*rowBytes*/) const override;
     SkData* onRefEncoded() const override;
-    bool getROPixels(SkBitmap*) const override;
+    bool getROPixels(SkBitmap*, SkScalar = SK_Scalar1) const override;
     GrTexture* asTextureRef(GrContext*, const GrTextureParams&) const override;
     SkImage* onNewSubset(const SkIRect&) const override;
 
     // exposed for SkSurface_Raster via SkNewImageFromPixelRef
     SkImage_Raster(const SkImageInfo&, SkPixelRef*, const SkIPoint& origin, size_t rowBytes);
 
     SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
 
     bool isOpaque() const override;
     bool onAsLegacyBitmap(SkBitmap*, LegacyBitmapMode) const override;
@@ skipping 72 matching lines @@
     const SkImageInfo prInfo = pr->info();
     const SkImageInfo bmInfo = fBitmap.info();
 
     // we only try if we (the image) cover the entire area of the pixelRef
     if (prInfo.width() == bmInfo.width() && prInfo.height() == bmInfo.height()) {
         return pr->refEncodedData();
     }
     return nullptr;
 }
 
-bool SkImage_Raster::getROPixels(SkBitmap* dst) const {
+bool SkImage_Raster::getROPixels(SkBitmap* dst, SkScalar scaleHint) const {
     *dst = fBitmap;
     return true;
 }
 
 GrTexture* SkImage_Raster::asTextureRef(GrContext* ctx, const GrTextureParams& params) const {
 #if SK_SUPPORT_GPU
     if (!ctx) {
         return nullptr;
     }
 
@@ skipping 109 matching lines @@
         // pixelref since the caller might call setImmutable() themselves
         // (thus changing our state).
         if (fBitmap.isImmutable()) {
             bitmap->setInfo(fBitmap.info(), fBitmap.rowBytes());
             bitmap->setPixelRef(fBitmap.pixelRef(), fBitmap.pixelRefOrigin());
             return true;
         }
     }
     return this->INHERITED::onAsLegacyBitmap(bitmap, mode);
 }