1 /*
2   Copyright 1999-2021 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 "magick/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   HanningFilter,
40   HammingFilter,
41   BlackmanFilter,
42   GaussianFilter,
43   QuadraticFilter,
44   CubicFilter,
45   CatromFilter,
46   MitchellFilter,
47   JincFilter,
48   SincFilter,
49   SincFastFilter,
50   KaiserFilter,
51   WelshFilter,
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   SentinelFilter  /* a count of all the filters, not a real filter */
66 } FilterTypes;
67 
68 /*
69   Backward compatibility for the more correctly named Jinc Filter.  Original
70   source of this filter is from "zoom" but it refers to a reference by Pratt,
71   who does not actualy name the filter.
72 */
73 #define BesselFilter JincFilter
74 
75 typedef struct _ResampleFilter
76   ResampleFilter;
77 
78 extern MagickExport MagickBooleanType
79   ResamplePixelColor(ResampleFilter *,const double,const double,
80     MagickPixelPacket *),
81   SetResampleFilterInterpolateMethod(ResampleFilter *,
82     const InterpolatePixelMethod),
83   SetResampleFilterVirtualPixelMethod(ResampleFilter *,
84     const VirtualPixelMethod);
85 
86 extern MagickExport ResampleFilter
87   *AcquireResampleFilter(const Image *,ExceptionInfo *),
88   *DestroyResampleFilter(ResampleFilter *);
89 
90 extern MagickExport void
91   ScaleResampleFilter(ResampleFilter *,const double,const double,const double,
92     const double),
93   SetResampleFilter(ResampleFilter *,const FilterTypes,const double);
94 
95 #if defined(__cplusplus) || defined(c_plusplus)
96 }
97 #endif
98 
99 #endif
100