You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
117 lines
3.4 KiB
117 lines
3.4 KiB
/* |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License as published by |
|
* the Free Software Foundation; either version 2 of the License, or |
|
* (at your option) any later version. |
|
* |
|
* This program is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
* GNU Library General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU General Public License |
|
* along with this program; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor Boston, MA 02110-1301, USA |
|
*/ |
|
|
|
/** |
|
* @file |
|
* @brief Functions for work with image bitmaps |
|
*/ |
|
|
|
#include "common.h" |
|
#include "bitmap.h" |
|
|
|
/** bictionary for speedup bitmap comparing */ |
|
static unsigned char dict[256] = { |
|
/* 0x00 _0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _A _B _C _D _E _F */ |
|
/* ---------------------------------------------------- */ |
|
/* 0_ */ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, |
|
/* 1_ */ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, |
|
/* 2_ */ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, |
|
/* 3_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* 4_ */ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, |
|
/* 5_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* 6_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* 7_ */ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, |
|
/* 8_ */ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, |
|
/* 9_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* A_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* B_ */ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, |
|
/* C_ */ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, |
|
/* D_ */ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, |
|
/* E_ */ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, |
|
/* F_ */ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8, |
|
}; |
|
|
|
int |
|
simdb_bitmap_compare(const unsigned char *a, |
|
const unsigned char *b) |
|
{ |
|
unsigned char diff = 0; |
|
size_t i = 0; |
|
size_t cnt = 0; |
|
|
|
for (i = 0; i < SIMDB_BITMAP_SIZE; i++, a++, b++) { |
|
diff = *a ^ *b; |
|
cnt += dict[diff]; |
|
} |
|
|
|
return cnt; |
|
} |
|
|
|
size_t |
|
simdb_bitmap_diffmap(const unsigned char *a, |
|
const unsigned char *b, |
|
unsigned char *diff) |
|
{ |
|
size_t i = 0; |
|
|
|
for (i = 0; i < SIMDB_BITMAP_SIZE; i++, a++, b++, diff++) { |
|
*diff = *a ^ *b; |
|
} |
|
|
|
return i; |
|
} |
|
|
|
size_t |
|
simdb_bitmap_unpack(const unsigned char *map, |
|
unsigned char ** const buf) { |
|
size_t buf_size = SIMDB_BITMAP_BITS; |
|
uint16_t *p, row, mask; |
|
unsigned char *q = NULL; |
|
|
|
CALLOC(*buf, buf_size, sizeof(char)); |
|
|
|
p = (uint16_t *) map; |
|
q = *buf; |
|
for (size_t i = 0; i < SIMDB_BITMAP_SIDE; i++, p++) { |
|
row = *p; mask = 0x1; |
|
for (size_t j = 0; j < SIMDB_BITMAP_SIDE; j++, q++) { |
|
*q = (row & mask) ? 0xFF : 0x00; |
|
mask <<= 1; |
|
} |
|
} |
|
|
|
return buf_size; |
|
} |
|
|
|
void |
|
simdb_bitmap_print(const unsigned char *map) { |
|
unsigned char *buf = NULL, *p = NULL; |
|
char line[SIMDB_BITMAP_SIDE * 2 + 1]; |
|
|
|
simdb_bitmap_unpack(map, &buf); |
|
p = buf; |
|
|
|
line[SIMDB_BITMAP_SIDE * 2] = '\0'; |
|
for (size_t i = 0; i < SIMDB_BITMAP_SIDE; i++) { |
|
for (size_t j = 0; j < SIMDB_BITMAP_SIDE; j++, p++) { |
|
line[(j * 2) + 0] = (*p == 0x00) ? CHAR_NONE : CHAR_USED; |
|
line[(j * 2) + 1] = (*p == 0x00) ? CHAR_NONE : CHAR_USED; |
|
} |
|
puts(line); |
|
} |
|
|
|
FREE(buf); |
|
}
|
|
|