Add alternate SkPicture::clone

src/core/SkPicture.cpp

Index: src/core/SkPicture.cpp
diff --git a/src/core/SkPicture.cpp b/src/core/SkPicture.cpp
index 9261664717eeaf72cf170a1356b630cf79d8fc6e..03a18ab8f839f93106459315f29c562c2433ef70 100644
--- a/src/core/SkPicture.cpp
+++ b/src/core/SkPicture.cpp
@@ -191,8 +191,8 @@ SkPicture::~SkPicture() {}
 #ifdef SK_SUPPORT_LEGACY_PICTURE_CLONE
 // fRecord TODO, fix by deleting this method
 SkPicture* SkPicture::clone() const {
-    SkPicture* clonedPicture = SkNEW(SkPicture);
-    this->clone(clonedPicture, 1);
+    SkPicture* clonedPicture;
+    this->clone(&clonedPicture, 1);
     return clonedPicture;
 }
 
@@ -261,6 +261,72 @@ void SkPicture::clone(SkPicture* pictures, int count) const {
         }
     }
 }
+
+// fRecord TODO, fix by deleting this method
+void SkPicture::clone(SkPicture* pictures[], int count) const {

[mtklein, 2014/07/10 19:14:01]

Can this be, for now,

void SkPicture::clone(SkPicture* pictures[], int count) const {
  for (int i = 0; i < count; i++) {
    pictures[i] = SkNEW(SkPicture);
  }
  clone(*pictures, count);
}

next to become

void SkPicture::clone(SkPicture* pictures[], int count) const {
  for (int i = 0; i < count; i++) {
    pictures[i] = this;
  }
}

?

+    SkPictCopyInfo copyInfo;
+
+    for (int i = 0; i < count; i++) {
+        SkPicture* clone = pictures[i] = SkNEW(SkPicture);
+
+        clone->needsNewGenID();
+        clone->fWidth = fWidth;
+        clone->fHeight = fHeight;
+        clone->fData.reset(NULL);
+        clone->fRecordWillPlayBackBitmaps = fRecordWillPlayBackBitmaps;
+
+        /*  We want to copy the src's playback. However, if that hasn't been built
+            yet, we need to fake a call to endRecording() without actually calling
+            it (since it is destructive, and we don't want to change src).
+         */
+        if (fData.get()) {
+            if (!copyInfo.initialized) {
+                int paintCount = SafeCount(fData->fPaints);
+
+                /* The alternative to doing this is to have a clone method on the paint and have it
+                 * make the deep copy of its internal structures as needed. The holdup to doing
+                 * that is at this point we would need to pass the SkBitmapHeap so that we don't
+                 * unnecessarily flatten the pixels in a bitmap shader.
+                 */
+                copyInfo.paintData.setCount(paintCount);
+
+                /* Use an SkBitmapHeap to avoid flattening bitmaps in shaders. If there already is
+                 * one, use it. If this SkPictureData was created from a stream, fBitmapHeap
+                 * will be NULL, so create a new one.
+                 */
+                if (fData->fBitmapHeap.get() == NULL) {
+                    // FIXME: Put this on the stack inside SkPicture::clone.
+                    SkBitmapHeap* heap = SkNEW(SkBitmapHeap);
+                    copyInfo.controller.setBitmapStorage(heap);
+                    heap->unref();
+                } else {
+                    copyInfo.controller.setBitmapStorage(fData->fBitmapHeap);
+                }
+
+                SkDEBUGCODE(int heapSize = SafeCount(fData->fBitmapHeap.get());)
+                for (int i = 0; i < paintCount; i++) {
+                    if (NeedsDeepCopy(fData->fPaints->at(i))) {
+                        copyInfo.paintData[i] =
+                            SkFlatData::Create<SkPaint::FlatteningTraits>(&copyInfo.controller,
+                                                              fData->fPaints->at(i), 0);
+
+                    } else {
+                        // this is our sentinel, which we use in the unflatten loop
+                        copyInfo.paintData[i] = NULL;
+                    }
+                }
+                SkASSERT(SafeCount(fData->fBitmapHeap.get()) == heapSize);
+
+                // needed to create typeface playback
+                copyInfo.controller.setupPlaybacks();
+                copyInfo.initialized = true;
+            }
+
+            clone->fData.reset(SkNEW_ARGS(SkPictureData, (*fData, &copyInfo)));
+            clone->fUniqueID = this->uniqueID(); // need to call method to ensure != 0
+        }
+    }
+}
 #endif//SK_SUPPORT_LEGACY_PICTURE_CLONE
 
 // fRecord OK