WebCore/CanvasPixelArray.h

   1 /*
   2  * Copyright (C) 2008, 2009 Apple 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  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef CanvasPixelArray_h
  30 #define CanvasPixelArray_h
  31
  32 #include <wtf/ByteArray.h>
  33 #include <wtf/MathExtras.h>
  34 #include <wtf/PassRefPtr.h>
  35 #include <wtf/RefCounted.h>
  36 #include <wtf/Vector.h>
  37
  38 namespace WebCore {
  39
  40     class CanvasPixelArray : public RefCounted<CanvasPixelArray> {
  41     public:
  42         static PassRefPtr<CanvasPixelArray> create(unsigned length);
  43
  44         WTF::ByteArray* data() { return m_data.get(); }
  45         unsigned length() const { return m_data->length(); }
  46
  47         void set(unsigned index, double value)
  48         {
  49             m_data->set(index, value);
  50         }
  51
  52         bool get(unsigned index, unsigned char& result) const
  53         {
  54             return m_data->get(index, result);
  55         }
  56
  57     private:
  58         CanvasPixelArray(unsigned length);
  59         RefPtr<WTF::ByteArray> m_data;
  60     };
  61
  62 } // namespace WebCore
  63
  64 #endif // CanvasPixelArray_h