1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
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
17// Pyramid.h
18
19#ifndef PYRAMID_H
20#define PYRAMID_H
21
22#include "ImageUtils.h"
23
24typedef unsigned short int real;
25
26//  Structure containing a packed pyramid of type ImageTypeShort.  Used for pyramid
27//  blending, among other things.
28
29class PyramidShort
30{
31
32public:
33
34  ImageTypeShort *ptr;              // Pointer containing the image
35  real width, height;               // Width and height of input images
36  real numChannels;                 // Number of channels in input images
37  real border;                      // border size
38  real pitch;                       // Pitch.  Used for moving through image efficiently.
39
40  static PyramidShort *allocatePyramidPacked(real width, real height, real levels, real border = 0);
41  static PyramidShort *allocateImage(real width, real height, real border);
42  static void createPyramid(ImageType image, PyramidShort *pyramid, int last = 3 );
43  static void freeImage(PyramidShort *image);
44
45  static unsigned int calcStorage(real width, real height, real border2, int levels, int *lines);
46
47  static void BorderSpread(PyramidShort *pyr, int left, int right, int top, int bot);
48  static void BorderExpandOdd(PyramidShort *in, PyramidShort *out, PyramidShort *scr, int mode);
49  static int BorderExpand(PyramidShort *pyr, int nlev, int mode);
50  static int BorderReduce(PyramidShort *pyr, int nlev);
51  static void BorderReduceOdd(PyramidShort *in, PyramidShort *out, PyramidShort *scr);
52};
53
54#endif
55