Fix image layer codepath

- asynchronous loading
- support for tiled content using TiledTexture
- fix repaint/duplication bugs
- share same textures as layers
- disambiguate between images by computing a CRC code
- added better debugging in TilesManager/ClassTracker to track
  memory usage

bug:5661120 bug:5572134 bug:5521718

Change-Id: Id422fb991d6233bbe4dc6e5c3c7409468b7dca98

1 files changed, 4 insertions, 20 deletions

diff --git a/Source/WebKit/android/jni/ViewStateSerializer.cpp b/Source/WebKit/android/jni/ViewStateSerializer.cpp
index 93f4375..6b473f5 100644
--- a/Source/WebKit/android/jni/ViewStateSerializer.cpp
+++ b/Source/WebKit/android/jni/ViewStateSerializer.cpp
@@ -111,11 +111,6 @@ static BaseLayerAndroid* nativeDeserializeViewState(JNIEnv* env, jobject, jobjec
         if (childLayer)
             layer->addChild(childLayer);
     }
-    // Now double back and delete any imageRefs
-    for (int i = 0; i < layer->countChildren(); i++) {
-        LayerAndroid* childLayer = static_cast<LayerAndroid*>(layer->getChild(i));
-        cleanupImageRefs(childLayer);
-    }
     delete stream;
     return layer;
 }
@@ -297,15 +292,16 @@ void serializeLayer(LayerAndroid* layer, SkWStream* stream)
     stream->writeBool(layer->m_preserves3D);
     stream->writeScalar(layer->m_anchorPointZ);
     stream->writeScalar(layer->m_drawOpacity);
-    bool hasContentsImage = layer->m_imageRef != 0;
+    bool hasContentsImage = layer->m_imageCRC != 0;
     stream->writeBool(hasContentsImage);
     if (hasContentsImage) {
         SkFlattenableWriteBuffer buffer(1024);
         buffer.setFlags(SkFlattenableWriteBuffer::kCrossProcess_Flag);
         ImageTexture* imagetexture =
-                ImagesManager::instance()->getTextureForImage(layer->m_imageRef, false);
+                ImagesManager::instance()->retainImage(layer->m_imageCRC);
         if (imagetexture && imagetexture->bitmap())
             imagetexture->bitmap()->flatten(buffer);
+        ImagesManager::instance()->releaseImage(layer->m_imageCRC);
         stream->write32(buffer.size());
         buffer.writeToStream(stream);
     }
@@ -388,8 +384,7 @@ LayerAndroid* deserializeLayer(SkStream* stream)
         contentsImage.unflatten(buffer);
         SkBitmapRef* imageRef = new SkBitmapRef(contentsImage);
         layer->setContentsImage(imageRef);
-        // We delay deleting the imageRef until after deserialization to make
-        // sure we have unique keys
+        delete imageRef;
     }
     bool hasRecordingPicture = stream->readBool();
     if (hasRecordingPicture) {
@@ -418,17 +413,6 @@ LayerAndroid* deserializeLayer(SkStream* stream)
     return layer;
 }
 
-void cleanupImageRefs(LayerAndroid* layer)
-{
-    if (!layer)
-        return;
-    int count = layer->countChildren();
-    for (int i = 0; i < count; i++)
-        cleanupImageRefs(layer->getChild(i));
-    if (layer->m_imageRef)
-        delete layer->m_imageRef;
-}
-
 /*
  * JNI registration
  */