Expand pixelref to return SkImageInfo and rowbytes

src/image/SkDataPixelRef.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 "SkDataPixelRef.h"
 #include "SkData.h"
 #include "SkFlattenableBuffers.h"
 
-SkDataPixelRef::SkDataPixelRef(SkData* data) : fData(data) {
+SkDataPixelRef::SkDataPixelRef(const SkImageInfo& info,
+                               SkData* data, size_t rowBytes)
+    : fInfo(info)
+    , fData(data)
+    , fRB(rowBytes) 
+{
     fData->ref();
-    this->setPreLocked(const_cast<void*>(fData->data()), NULL);
+    this->setPreLocked(const_cast<void*>(fData->data()), rowBytes, NULL);
 }
 
 SkDataPixelRef::~SkDataPixelRef() {
     fData->unref();
 }
 
-void* SkDataPixelRef::onLockPixels(SkColorTable** ct) {
+void* SkDataPixelRef::onLockPixels(SkImageInfo* info, size_t* rowBytes,
+                                   SkColorTable** ct) {
+    *info = fInfo;
+    *rowBytes = fRB;
     *ct = NULL;
     return const_cast<void*>(fData->data());
 }
 
 void SkDataPixelRef::onUnlockPixels() {
     // nothing to do
 }
 
 void SkDataPixelRef::flatten(SkFlattenableWriteBuffer& buffer) const {

[scroggo, 2013/11/19 18:17:09]

We need to flatten (and unflatten) fInfo.

[reed1, 2013/11/20 20:56:56]

doh!

     this->INHERITED::flatten(buffer);
+    
     buffer.writeDataAsByteArray(fData);
+    buffer.write32(fRB);
 }
 
 SkDataPixelRef::SkDataPixelRef(SkFlattenableReadBuffer& buffer)
         : INHERITED(buffer, NULL) {
     fData = buffer.readByteArrayAsData();
-    this->setPreLocked(const_cast<void*>(fData->data()), NULL);
+    fRB = buffer.read32();
+    this->setPreLocked(const_cast<void*>(fData->data()), fRB, NULL);
 }