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      1 /*
      2  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifndef RenderLayerFilterInfo_h
     31 #define RenderLayerFilterInfo_h
     32 
     33 #include "core/dom/Element.h"
     34 #include "core/fetch/DocumentResource.h"
     35 #include "platform/geometry/LayoutRect.h"
     36 #include "platform/graphics/filters/FilterOperation.h"
     37 #include "wtf/HashMap.h"
     38 #include "wtf/PassRefPtr.h"
     39 #include "wtf/RefPtr.h"
     40 
     41 namespace WebCore {
     42 
     43 class FilterEffectRenderer;
     44 class FilterOperations;
     45 class RenderLayer;
     46 class RenderLayerFilterInfo;
     47 
     48 typedef HashMap<const RenderLayer*, RenderLayerFilterInfo*> RenderLayerFilterInfoMap;
     49 
     50 class RenderLayerFilterInfo FINAL : public DocumentResourceClient {
     51 public:
     52     static RenderLayerFilterInfo* filterInfoForRenderLayer(const RenderLayer*);
     53     static RenderLayerFilterInfo* createFilterInfoForRenderLayerIfNeeded(RenderLayer*);
     54     static void removeFilterInfoForRenderLayer(RenderLayer*);
     55 
     56     const LayoutRect& dirtySourceRect() const { return m_dirtySourceRect; }
     57     void expandDirtySourceRect(const LayoutRect& rect) { m_dirtySourceRect.unite(rect); }
     58     void resetDirtySourceRect() { m_dirtySourceRect = LayoutRect(); }
     59 
     60     FilterEffectRenderer* renderer() const { return m_renderer.get(); }
     61     void setRenderer(PassRefPtr<FilterEffectRenderer>);
     62 
     63     void updateReferenceFilterClients(const FilterOperations&);
     64     virtual void notifyFinished(Resource*) OVERRIDE;
     65     void removeReferenceFilterClients();
     66 
     67 private:
     68     RenderLayerFilterInfo(RenderLayer*);
     69     virtual ~RenderLayerFilterInfo();
     70 
     71     RenderLayer* m_layer;
     72 
     73     RefPtr<FilterEffectRenderer> m_renderer;
     74     LayoutRect m_dirtySourceRect;
     75 
     76     static RenderLayerFilterInfoMap* s_filterMap;
     77     WillBePersistentHeapVector<RefPtrWillBeMember<Element> > m_internalSVGReferences;
     78     Vector<ResourcePtr<DocumentResource> > m_externalSVGReferences;
     79 };
     80 
     81 } // namespace WebCore
     82 
     83 
     84 #endif // RenderLayerFilterInfo_h
     85