Source/WebCore/platform/graphics/ca/PlatformCAFilters.h

/*
 * Copyright (C) 2013 Apple Inc. 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 APPLE INC. ``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 APPLE INC. OR
 * CONTRIBUTORS 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef PlatformCAFilters_h
#define PlatformCAFilters_h

#include "FilterOperations.h"
#include "GraphicsTypes.h"
#include "PlatformLayer.h"
#include <wtf/RetainPtr.h>

#if PLATFORM(COCOA)
#define USE_CA_FILTERS 1
#else
#define USE_CA_FILTERS 0
#endif

OBJC_CLASS NSValue;

namespace WebCore {

class PlatformCALayer;

class PlatformCAFilters {
public:
    WEBCORE_EXPORT static void setFiltersOnLayer(PlatformLayer*, const FilterOperations&);
    WEBCORE_EXPORT static void setBlendingFiltersOnLayer(PlatformLayer*, const BlendMode);
    static int numAnimatedFilterProperties(FilterOperation::OperationType);
    static const char* animatedFilterPropertyName(FilterOperation::OperationType, int internalFilterPropertyIndex);

#if PLATFORM(COCOA)
    WEBCORE_EXPORT static RetainPtr<NSValue> filterValueForOperation(const FilterOperation*, int internalFilterPropertyIndex);
#endif

#ifdef USE_CA_FILTERS
    // A null operation indicates that we should make a "no-op" filter of the given type.
    static RetainPtr<NSValue> colorMatrixValueForFilter(FilterOperation::OperationType, const FilterOperation*);
#endif
};

}

#endif // PlatformCAFilters_h