khtml/svg/graphics/filters/SVGFEComponentTransfer.h

   1 /*
   2     Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   3                   2004, 2005 Rob Buis <buis@kde.org>
   4                   2005 Eric Seidel <eric@webkit.org>
   5
   6     This library is free software; you can redistribute it and/or
   7     modify it under the terms of the GNU Library General Public
   8     License as published by the Free Software Foundation; either
   9     version 2 of the License, or (at your option) any later version.
  10
  11     This library is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14     Library General Public License for more details.
  15
  16     You should have received a copy of the GNU Library General Public License
  17     aint with this library; see the file COPYING.LIB.  If not, write to
  18     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19     Boston, MA 02110-1301, USA.
  20 */
  21
  22 #ifndef SVGFEComponentTransfer_h
  23 #define SVGFEComponentTransfer_h
  24
  25 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
  26 #include <wtf/Vector.h>
  27
  28 #include "SVGFilterEffect.h"
  29 #include "SVGFEDisplacementMap.h"
  30
  31 #if PLATFORM(CI)
  32 #ifdef __OBJC__
  33 @class CIImage;
  34 @class CIFilter;
  35 #else
  36 class CIImage;
  37 class CIFilter;
  38 #endif
  39 #endif
  40
  41 namespace WebCore {
  42
  43 enum SVGComponentTransferType {
  44     SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN  = 0,
  45     SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY = 1,
  46     SVG_FECOMPONENTTRANSFER_TYPE_TABLE    = 2,
  47     SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE = 3,
  48     SVG_FECOMPONENTTRANSFER_TYPE_LINEAR   = 4,
  49     SVG_FECOMPONENTTRANSFER_TYPE_GAMMA    = 5
  50 };
  51
  52 struct SVGComponentTransferFunction {
  53     SVGComponentTransferFunction()
  54         : type(SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN)
  55         , slope(0.0f)
  56         , intercept(0.0f)
  57         , amplitude(0.0f)
  58         , exponent(0.0f)
  59         , offset(0.0f)
  60     {
  61     }
  62
  63     SVGComponentTransferType type;
  64
  65     float slope;
  66     float intercept;
  67     float amplitude;
  68     float exponent;
  69     float offset;
  70
  71     Vector<float> tableValues;
  72 };
  73
  74 class SVGFEComponentTransfer : public SVGFilterEffect {
  75 public:
  76     SVGFEComponentTransfer(SVGResourceFilter*);
  77
  78     SVGComponentTransferFunction redFunction() const;
  79     void setRedFunction(const SVGComponentTransferFunction&);
  80
  81     SVGComponentTransferFunction greenFunction() const;
  82     void setGreenFunction(const SVGComponentTransferFunction&);
  83
  84     SVGComponentTransferFunction blueFunction() const;
  85     void setBlueFunction(const SVGComponentTransferFunction&);
  86
  87     SVGComponentTransferFunction alphaFunction() const;
  88     void setAlphaFunction(const SVGComponentTransferFunction&);
  89
  90     virtual TextStream& externalRepresentation(TextStream&) const;
  91
  92 #if PLATFORM(CI)
  93     virtual CIFilter* getCIFilter(const FloatRect& bbox) const;
  94
  95 private:
  96     CIFilter* getFunctionFilter(SVGChannelSelectorType, CIImage* inputImage) const;
  97 #endif
  98
  99 private:
 100     SVGComponentTransferFunction m_redFunc;
 101     SVGComponentTransferFunction m_greenFunc;
 102     SVGComponentTransferFunction m_blueFunc;
 103     SVGComponentTransferFunction m_alphaFunc;
 104 };
 105
 106 } // namespace WebCore
 107
 108 #endif // ENABLE(SVG) && ENABLE(SVG_FILTERS)
 109
 110 #endif // SVGFEComponentTransfer_h