1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* Copyright (C) 2013 DENSO CORPORATION
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "bitmap.h"
#include <stdio.h>
struct __attribute__ ((__packed__)) BITMAPFILEHEADER {
char bfType[2];
uint32_t bfSize;
uint16_t bfReserved1;
uint16_t bfReserved2;
uint32_t bfOffBits;
};
struct __attribute__ ((__packed__)) BITMAPINFOHEADER {
uint32_t biSize;
uint32_t biWidth;
uint32_t biHeight;
uint16_t biPlanes;
uint16_t biBitCount;
uint32_t biCompression;
uint32_t biSizeImage;
uint32_t biXPixPerMeter;
uint32_t biYPixPerMeter;
uint32_t biClrUsed;
uint32_t biClrImporant;
};
static void
create_file_header(struct BITMAPFILEHEADER *file_header, int32_t image_size)
{
file_header->bfType[0] = 'B';
file_header->bfType[1] = 'M';
file_header->bfSize = sizeof(struct BITMAPFILEHEADER)
+ sizeof(struct BITMAPINFOHEADER)
+ image_size;
file_header->bfOffBits = sizeof(struct BITMAPFILEHEADER)
+ sizeof(struct BITMAPINFOHEADER);
}
static void
create_info_header(struct BITMAPINFOHEADER *info_header, int32_t image_size, int32_t width, int32_t height, int16_t bpp)
{
info_header->biSize = sizeof(struct BITMAPINFOHEADER);
info_header->biWidth = width;
info_header->biHeight = height;
info_header->biPlanes = 1;
info_header->biBitCount = bpp;
info_header->biSizeImage = image_size;
}
static int
write_bitmap(const char *filename,
const struct BITMAPFILEHEADER *file_header,
const struct BITMAPINFOHEADER *info_header,
const char *buffer)
{
FILE *fp = fopen(filename, "w");
if (fp == NULL) {
return -1;
}
fwrite(file_header, sizeof(struct BITMAPFILEHEADER), 1, fp);
fwrite(info_header, sizeof(struct BITMAPINFOHEADER), 1, fp);
fwrite(buffer, info_header->biSizeImage, 1, fp);
fclose(fp);
return 0;
}
int
save_as_bitmap(const char *filename,
const char *buffer,
int32_t image_size,
int32_t width,
int32_t height,
int16_t bpp)
{
if ((filename == NULL) || (buffer == NULL)) {
return -1;
}
struct BITMAPFILEHEADER file_header = {};
struct BITMAPINFOHEADER info_header = {};
create_file_header(&file_header, image_size);
create_info_header(&info_header, image_size, width, height, bpp);
return write_bitmap(filename, &file_header, &info_header, buffer);
}
|
