Preserve texture compression when saving a revised skp from debugger

debugger/QT/SkDebuggerGUI.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 "SkDebuggerGUI.h"
 #include "PictureRenderer.h"
 #include "SkPictureData.h"
@@ skipping 337 matching lines @@
 
 void SkDebuggerGUI::drawComplete() {
     SkString clipStack;
     fDebugger.getClipStackText(&clipStack);
     fInspectorWidget.setText(clipStack.c_str(), SkInspectorWidget::kClipStack_TabType);
 
     fInspectorWidget.setMatrix(fDebugger.getCurrentMatrix());
     fInspectorWidget.setClip(fDebugger.getCurrentClip());
 }
 
+// Encodes to PNG, unless there is already encoded data, in which case that gets
+// used.
+class PngPixelSerializer : public SkPixelSerializer {

[scroggo, 2015/03/20 17:21:41]

I think this is the third instance of this. It may be time to consolidate.

+public:
+    bool onUseEncodedData(const void*, size_t) SK_OVERRIDE { return true; }
+    SkData* onEncodePixels(const SkImageInfo& info, const void* pixels,
+                           size_t rowBytes) SK_OVERRIDE {
+        return SkImageEncoder::EncodeData(info, pixels, rowBytes, SkImageEncoder::kPNG_Type, 100);
+    }
+};
+
 void SkDebuggerGUI::saveToFile(const SkString& filename) {
     SkFILEWStream file(filename.c_str());
     SkAutoTUnref<SkPicture> copy(fDebugger.copyPicture());
 
-    copy->serialize(&file);
+    PngPixelSerializer serializer;
+    copy->serialize(&file, &serializer);
 }
 
 void SkDebuggerGUI::loadFile(QListWidgetItem *item) {
     if (fDirectoryWidgetActive) {
         fFileName = fPath.toAscii().data();
         // don't add a '/' to files in the local directory
         if (fFileName.size() > 0) {
             fFileName.append("/");
         }
         fFileName.append(item->text().toAscii().data());
@@ skipping 479 matching lines @@
         fCanvasWidget.drawTo(fPausedRow);
     } else {
         fCanvasWidget.drawTo(fListWidget.currentRow());
     }
 }
 
 void SkDebuggerGUI::updateHit(int newHit) {
     fCommandHitBox.setText(QString::number(newHit));
 }