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      1 /*
      2   Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization
      3   dedicated to making software imaging solutions freely available.
      4 
      5   You may not use this file except in compliance with the License.  You may
      6   obtain a copy of the License at
      7 
      8     https://imagemagick.org/script/license.php
      9 
     10   Unless required by applicable law or agreed to in writing, software
     11   distributed under the License is distributed on an "AS IS" BASIS,
     12   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13   See the License for the specific language governing permissions and
     14   limitations under the License.
     15 
     16   MagickCore graphic resample methods.
     17 */
     18 #ifndef MAGICKCORE_RESAMPLE_H
     19 #define MAGICKCORE_RESAMPLE_H
     20 
     21 #include "MagickCore/cache-view.h"
     22 
     23 #if defined(__cplusplus) || defined(c_plusplus)
     24 extern "C" {
     25 #endif
     26 
     27 /*
     28   WARNING:  The order of this table must also match the order of a table
     29   located in AcquireResizeFilter() in "resize.c" otherwise the users filter
     30   will not match the actual filter that is setup.
     31 */
     32 typedef enum
     33 {
     34   UndefinedFilter,
     35   PointFilter,
     36   BoxFilter,
     37   TriangleFilter,
     38   HermiteFilter,
     39   HannFilter,
     40   HammingFilter,
     41   BlackmanFilter,
     42   GaussianFilter,
     43   QuadraticFilter,
     44   CubicFilter,
     45   CatromFilter,
     46   MitchellFilter,
     47   JincFilter,
     48   SincFilter,
     49   SincFastFilter,
     50   KaiserFilter,
     51   WelchFilter,
     52   ParzenFilter,
     53   BohmanFilter,
     54   BartlettFilter,
     55   LagrangeFilter,
     56   LanczosFilter,
     57   LanczosSharpFilter,
     58   Lanczos2Filter,
     59   Lanczos2SharpFilter,
     60   RobidouxFilter,
     61   RobidouxSharpFilter,
     62   CosineFilter,
     63   SplineFilter,
     64   LanczosRadiusFilter,
     65   CubicSplineFilter,
     66   SentinelFilter  /* a count of all the filters, not a real filter */
     67 } FilterType;
     68 
     69 /*
     70   Backward compatibility for the more correctly named Jinc Filter.  Original
     71   source of this filter is from "zoom" but it refers to a reference by Pratt,
     72   who does not actualy name the filter.
     73 
     74   also miss-spellings of common filters
     75 */
     76 #define BesselFilter  JincFilter
     77 #define WelshFilter   WelchFilter
     78 #define HanningFilter HannFilter
     79 
     80 typedef struct _ResampleFilter
     81   ResampleFilter;
     82 
     83 extern MagickExport MagickBooleanType
     84   ResamplePixelColor(ResampleFilter *,const double,const double,
     85     PixelInfo *,ExceptionInfo *),
     86   SetResampleFilterInterpolateMethod(ResampleFilter *,
     87     const PixelInterpolateMethod),
     88   SetResampleFilterVirtualPixelMethod(ResampleFilter *,
     89     const VirtualPixelMethod);
     90 
     91 extern MagickExport ResampleFilter
     92   *AcquireResampleFilter(const Image *,ExceptionInfo *),
     93   *DestroyResampleFilter(ResampleFilter *);
     94 
     95 extern MagickExport void
     96   ScaleResampleFilter(ResampleFilter *,const double,const double,const double,
     97     const double),
     98   SetResampleFilter(ResampleFilter *,const FilterType);
     99 
    100 #if defined(__cplusplus) || defined(c_plusplus)
    101 }
    102 #endif
    103 
    104 #endif
    105