/*
 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef RenderLayerFilterInfo_h
#define RenderLayerFilterInfo_h

#include "core/dom/Element.h"
#include "core/fetch/DocumentResource.h"
#include "core/platform/graphics/LayoutRect.h"
#include "core/platform/graphics/filters/FilterOperation.h"
#include "core/platform/graphics/filters/custom/CustomFilterProgramClient.h"
#include "wtf/HashMap.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"

namespace WebCore {

class FilterEffectRenderer;
class FilterOperations;
class RenderLayer;
class RenderLayerFilterInfo;

typedef HashMap<const RenderLayer*, RenderLayerFilterInfo*> RenderLayerFilterInfoMap;

class RenderLayerFilterInfo : public CustomFilterProgramClient, public DocumentResourceClient {
public:
    static RenderLayerFilterInfo* filterInfoForRenderLayer(const RenderLayer*);
    static RenderLayerFilterInfo* createFilterInfoForRenderLayerIfNeeded(RenderLayer*);
    static void removeFilterInfoForRenderLayer(RenderLayer*);

    const LayoutRect& dirtySourceRect() const { return m_dirtySourceRect; }
    void expandDirtySourceRect(const LayoutRect& rect) { m_dirtySourceRect.unite(rect); }
    void resetDirtySourceRect() { m_dirtySourceRect = LayoutRect(); }

    FilterEffectRenderer* renderer() const { return m_renderer.get(); }
    void setRenderer(PassRefPtr<FilterEffectRenderer>);

    // Implementation of the CustomFilterProgramClient interface.
    virtual void notifyCustomFilterProgramLoaded(CustomFilterProgram*);

    void updateCustomFilterClients(const FilterOperations&);
    void removeCustomFilterClients();

    void updateReferenceFilterClients(const FilterOperations&);
    virtual void notifyFinished(Resource*);
    void removeReferenceFilterClients();

private:
    RenderLayerFilterInfo(RenderLayer*);
    ~RenderLayerFilterInfo();

    RenderLayer* m_layer;

    RefPtr<FilterEffectRenderer> m_renderer;
    LayoutRect m_dirtySourceRect;

    typedef Vector<RefPtr<CustomFilterProgram> > CustomFilterProgramList;
    CustomFilterProgramList m_cachedCustomFilterPrograms;

    static RenderLayerFilterInfoMap* s_filterMap;
    Vector<RefPtr<Element> > m_internalSVGReferences;
    Vector<ResourcePtr<DocumentResource> > m_externalSVGReferences;
};

} // namespace WebCore


#endif // RenderLayerFilterInfo_h