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      1 /*
      2  * Copyright (C) 2012 Google Inc. 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 copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef SkiaImageFilterBuilder_h
     27 #define SkiaImageFilterBuilder_h
     28 
     29 #include "platform/PlatformExport.h"
     30 #include "platform/geometry/FloatSize.h"
     31 #include "platform/graphics/ColorSpace.h"
     32 #include "public/platform/WebFilterOperations.h"
     33 #include "wtf/HashMap.h"
     34 
     35 class SkImageFilter;
     36 
     37 namespace WebCore {
     38 class FilterEffect;
     39 class FilterOperations;
     40 
     41 class PLATFORM_EXPORT SkiaImageFilterBuilder {
     42 public:
     43     SkiaImageFilterBuilder();
     44     ~SkiaImageFilterBuilder();
     45 
     46     PassRefPtr<SkImageFilter> build(FilterEffect*, ColorSpace);
     47     bool buildFilterOperations(const FilterOperations&, blink::WebFilterOperations*);
     48 
     49     PassRefPtr<SkImageFilter> transformColorSpace(
     50         SkImageFilter* input, ColorSpace srcColorSpace, ColorSpace dstColorSpace);
     51 
     52     void setCropOffset(const FloatSize& cropOffset) { m_cropOffset = cropOffset; };
     53     FloatSize cropOffset() { return m_cropOffset; }
     54 
     55 private:
     56     typedef std::pair<FilterEffect*, ColorSpace> FilterColorSpacePair;
     57     typedef HashMap<FilterColorSpacePair, RefPtr<SkImageFilter> > FilterBuilderHashMap;
     58     FilterBuilderHashMap m_map;
     59     FloatSize m_cropOffset;
     60 };
     61 
     62 } // namespace WebCore
     63 
     64 namespace WTF {
     65 
     66 template<> struct DefaultHash<WebCore::FilterEffect*> {
     67     typedef PtrHash<WebCore::FilterEffect*> Hash;
     68 };
     69 template<> struct DefaultHash<WebCore::ColorSpace> {
     70     typedef IntHash<unsigned> Hash;
     71 };
     72 
     73 } // namespace WTF
     74 
     75 #endif
     76