[77] | 1 | /* |
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| 2 | Copyright (C) 2006 Pedro Felzenszwalb |
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| 3 | |
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| 4 | This program is free software; you can redistribute it and/or modify |
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| 5 | it under the terms of the GNU General Public License as published by |
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| 6 | the Free Software Foundation; either version 2 of the License, or |
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| 7 | (at your option) any later version. |
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| 8 | |
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| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | GNU General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU General Public License |
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| 15 | along with this program; if not, write to the Free Software |
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| 16 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 17 | */ |
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| 18 | |
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| 19 | /* a simple image class */ |
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| 20 | |
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| 21 | #ifndef IMAGE_H |
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| 22 | #define IMAGE_H |
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| 23 | |
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| 24 | #include <cstring> |
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| 25 | #include <misc.h> |
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| 26 | /* |
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| 27 | template <class T> |
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| 28 | class image { |
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| 29 | public: |
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| 30 | |
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| 31 | image(const int width, const int height, const bool init = true); |
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| 32 | |
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| 33 | |
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| 34 | ~image(); |
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| 35 | |
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| 36 | |
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| 37 | void init(const T &val); |
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| 38 | |
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| 39 | image<T> *copy() const; |
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| 40 | |
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| 41 | int width() const { return w; } |
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| 42 | |
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| 43 | int height() const { return h; } |
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| 44 | |
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| 45 | T *data; |
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| 46 | |
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| 47 | T **access; |
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| 48 | |
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| 49 | private: |
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| 50 | int w, h; |
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| 51 | }; |
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| 52 | */ |
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| 53 | |
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| 54 | typedef struct{ |
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| 55 | int w,h; |
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| 56 | rgb *data; |
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| 57 | rgb **access; |
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| 58 | }image; |
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| 59 | |
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| 60 | typedef struct{ |
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| 61 | int w,h; |
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| 62 | float *data; |
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| 63 | float **access; |
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| 64 | }imagef; |
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| 65 | |
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| 66 | image *image_construct(const int width, const int height, const bool init); |
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| 67 | void image_destruct(image *self){ |
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| 68 | free(self->data); |
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| 69 | free(self->access); |
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| 70 | free(self); |
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| 71 | } |
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| 72 | void image_init(image *self,const rgb *val); |
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| 73 | image *image_copy(image *self); |
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| 74 | int image_width(image *self){return self->w;} |
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| 75 | int image_height(image *self){return self->h;} |
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| 76 | |
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| 77 | /* use imRef to access image data. */ |
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| 78 | #define imRef(im, x, y) (im->access[y][x]) |
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| 79 | |
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| 80 | /* use imPtr to get pointer to image data. */ |
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| 81 | #define imPtr(im, x, y) &(im->access[y][x]) |
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| 82 | |
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| 83 | image *image_construct(const int width, const int height, const bool init) { |
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| 84 | image *self = (image *)malloc(sizeof(image)); |
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| 85 | self->w = width; |
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| 86 | self->h = height; |
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| 87 | self->data = (rgb *)malloc(self->w * self->h * sizeof(rgb)); // allocate space for image data |
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| 88 | self->access = (rgb **)malloc(self->h* sizeof (rgb *)); // allocate space for row pointers |
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| 89 | |
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| 90 | // initialize row pointers |
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| 91 | for (int i = 0; i < self->h; i++) |
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| 92 | self->access[i] = self->data + (i * self->w); |
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| 93 | |
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| 94 | if (init) |
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| 95 | memset(self->data, 0, self->w * self->h * sizeof(rgb)); |
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| 96 | return self; |
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| 97 | } |
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| 98 | |
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| 99 | void image_init(image *self,const rgb *val){ |
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| 100 | rgb *ptr = imPtr(self,0,0); |
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| 101 | rgb *end = imPtr(self,self->w-1, self->h -1); |
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| 102 | while (ptr <=end) |
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| 103 | *ptr++ = *val; |
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| 104 | } |
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| 105 | |
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| 106 | image * image_copy(image *self){ |
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| 107 | image *im = image_construct(self->w, self->h,false); |
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| 108 | memcpy(im->data, self->data, self->w * self->h *sizeof(rgb)); |
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| 109 | return im; |
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| 110 | } |
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| 111 | |
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| 112 | //imagef |
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| 113 | |
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| 114 | imagef *imagef_construct(const int width, const int height, const bool init); |
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| 115 | void imagef_destruct(imagef *self){ |
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| 116 | free(self->data); |
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| 117 | free(self->access); |
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| 118 | free(self); |
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| 119 | } |
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| 120 | void imagef_init(imagef *self,const float *val); |
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| 121 | imagef *imagef_copy(imagef *self); |
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| 122 | int imagef_width(imagef *self){return self->w;} |
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| 123 | int imagef_height(imagef *self){return self->h;} |
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| 124 | |
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| 125 | /* use imRef to access image data. */ |
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| 126 | #define imRef(im, x, y) (im->access[y][x]) |
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| 127 | |
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| 128 | /* use imPtr to get pointer to image data. */ |
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| 129 | #define imPtr(im, x, y) &(im->access[y][x]) |
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| 130 | |
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| 131 | imagef *imagef_construct(const int width, const int height, const bool init) { |
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| 132 | imagef *self = (imagef *)malloc(sizeof(imagef)); |
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| 133 | self->w = width; |
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| 134 | self->h = height; |
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| 135 | self->data = (float *)malloc(self->w * self->h * sizeof(float)); // allocate space for image data |
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| 136 | self->access = (float **)malloc(self->h* sizeof (float *)); // allocate space for row pointers |
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| 137 | |
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| 138 | // initialize row pointers |
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| 139 | for (int i = 0; i < self->h; i++) |
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| 140 | self->access[i] = self->data + (i * self->w); |
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| 141 | |
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| 142 | if (init) |
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| 143 | memset(self->data, 0, self->w * self->h * sizeof(float)); |
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| 144 | return self; |
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| 145 | } |
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| 146 | |
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| 147 | void imagef_init(imagef *self,const float *val){ |
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| 148 | float *ptr = imPtr(self,0,0); |
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| 149 | float *end = imPtr(self,self->w-1, self->h -1); |
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| 150 | while (ptr <=end) |
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| 151 | *ptr++ = *val; |
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| 152 | |
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| 153 | } |
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| 154 | |
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| 155 | imagef * imagef_copy(image *self){ |
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| 156 | imagef *im = imagef_construct(self->w, self->h,false); |
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| 157 | memcpy(im->data, self->data, self->w * self->h *sizeof(float)); |
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| 158 | return im; |
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| 159 | } |
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| 160 | |
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| 161 | #endif |
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| 162 | |
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