change old picture serialization to really handle images

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"
 #include "SkData.h"
-#include "SkImageGenerator.h"
+#include "SkImageGeneratorPriv.h"
 #include "SkImagePriv.h"
 #include "SkPixelRef.h"
 #include "SkSurface.h"
 
 class SkImage_Raster : public SkImage_Base {
 public:
     static bool ValidArgs(const Info& info, size_t rowBytes, size_t* minSize) {
         const int maxDimension = SK_MaxS32 >> 2;
 
         if (info.width() <= 0 || info.height() <= 0) {
@@ skipping 29 matching lines @@
         }
         return true;
     }
 
     SkImage_Raster(const SkImageInfo&, SkData*, size_t rb, const SkSurfaceProps*);
     virtual ~SkImage_Raster();
 
     SkSurface* onNewSurface(const SkImageInfo&, const SkSurfaceProps&) const override;
     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;
 
     // exposed for SkSurface_Raster via SkNewImageFromPixelRef
     SkImage_Raster(const SkImageInfo&, SkPixelRef*, const SkIPoint& pixelRefOrigin, size_t rowBytes,
                    const SkSurfaceProps*);
 
     SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
 
     SkShader* onNewShader(SkShader::TileMode,
                           SkShader::TileMode,
@@ skipping 62 matching lines @@
 const void* SkImage_Raster::onPeekPixels(SkImageInfo* infoPtr, size_t* rowBytesPtr) const {
     const SkImageInfo info = fBitmap.info();
     if ((kUnknown_SkColorType == info.colorType()) || !fBitmap.getPixels()) {
         return NULL;
     }
     *infoPtr = info;
     *rowBytesPtr = fBitmap.rowBytes();
     return fBitmap.getPixels();
 }
 
+SkData* SkImage_Raster::onRefEncoded() const {
+    SkPixelRef* pr = fBitmap.pixelRef();
+    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 NULL;
+}
+
 bool SkImage_Raster::getROPixels(SkBitmap* dst) const {
     *dst = fBitmap;
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkImage* SkImage::NewRasterCopy(const SkImageInfo& info, const void* pixels, size_t rowBytes) {
     size_t size;
     if (!SkImage_Raster::ValidArgs(info, rowBytes, &size) || !pixels) {
@@ skipping 24 matching lines @@
                                 RasterReleaseProc proc, ReleaseContext ctx) {
     size_t size;
     if (!SkImage_Raster::ValidArgs(info, rowBytes, &size) || !pixels) {
         return NULL;
     }
 
     SkAutoDataUnref data(SkData::NewWithProc(pixels, size, proc, ctx));
     return SkNEW_ARGS(SkImage_Raster, (info, data, rowBytes, NULL));
 }
 
-SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator) {
+SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {
     SkBitmap bitmap;
-    if (!SkInstallDiscardablePixelRef(generator, &bitmap)) {
+    if (!SkInstallDiscardablePixelRef(generator, subset, &bitmap, NULL)) {
         return NULL;
     }
     if (0 == bitmap.width() || 0 == bitmap.height()) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkImage_Raster, (bitmap, NULL));
 }
 
 SkImage* SkNewImageFromPixelRef(const SkImageInfo& info, SkPixelRef* pr,
@@ skipping 30 matching lines @@
 }
 
 const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* image) {
     return ((const SkImage_Raster*)image)->getPixelRef();
 }
 
 bool SkImage_Raster::isOpaque() const {
     return fBitmap.isOpaque();
 }