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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
//bmconv.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bmconv.h"
/*************************************************************************
文件名称:bmconv.c/bmconv.h
文件功能:BMP提取到点阵RGB显示
创建时间:2013-04-20
文件作者:女孩不哭
文件版本:1.0
文件说明:专用
*************************************************************************/
__inline unsigned int myrgb(int a)
{
unsigned short b = (a&0xff)>>3;
unsigned short g = ((a&0xff00)>>10);
unsigned short r = ((a&0xff0000)>>19);
unsigned int rgb = (b|(g<<5)|(r<<11));
return rgb;
}
int main(void)
{
char file[260];
char file_out[260];
char* pstr = NULL;
unsigned char* buffer=NULL;
char* outout_data = NULL;
BITMAP_FILE_HEADER bmfh={0};
BITMAP_INFO_HEADER bmih={0};
FILE* fpin = NULL;
FILE* fpout = NULL;
size_t size = 0;
size_t file_size;
printf("输入BMP文件打开路径:");
fgets(file,sizeof(file),stdin);
pstr = strrchr(file,'\n');
if(pstr) *pstr = 0;
printf("输入BMP文件保存路径:");
fgets(file_out,sizeof(file_out),stdin);
pstr = strrchr(file_out,'\n');
if(pstr) *pstr = 0;
fpin = fopen(file,"rb");
if(fpin==NULL){
fprintf(stderr,"打开输入文件错误!\n");
return 1;
}
fpout = fopen(file_out,"wb");
if(fpout==NULL){
fprintf(stderr,"打开输出文件错误!\n");
fclose(fpin);
return 1;
}
fseek(fpin,0,SEEK_END);
file_size = ftell(fpin);
fseek(fpin,0,SEEK_SET);
size = fread(&bmfh,1,sizeof(bmfh),fpin);
if(size != sizeof(bmfh)){
fclose(fpin);
fprintf(stderr,"读取文件头时错误!\n");
return 1;
}
if(bmfh.signature[0]!='B' || bmfh.signature[1]!='M'){
fclose(fpin);
fprintf(stderr,"不是BMP文件!\n");
return 1;
}
printf(
"文件头结构体大小:%d\n"
"文件头签名:\'BM\'\n"
"文件大小:%u bytes\n"
"保留4字节值:%u\n"
"位图数据距文件开始的偏移:%u\n\n",(long)sizeof(bmfh),
bmfh.file_size,bmfh._reserved1,bmfh.data_offset);
size = fread(&bmih,1,sizeof(bmih),fpin);
if(size != sizeof(bmih)){
fclose(fpin);
fprintf(stderr,"读取图像信息头错误!\n");
return 1;
}
printf(
"图像信息头结构体大小:%d\n"
"图像信息头大小:%d bytes\n"
"位图宽度: %u 像素\n"
"位图高度: %u 像素\n"
"位图面数: %d 面\n"
"位深: %d bpp\n"
"压缩说明: %d\n"
"位图数据大小: %u bytes\n"
"水平分辨率: %u 像素/米\n"
"垂直分辨率: %u 像素/米\n"
"使用的颜色数: %u\n"
"重要的颜色数: %u\n\n",(long)sizeof(bmih),
bmih.header_size,bmih.width,bmih.height,bmih.planes,bmih.bpp,bmih.compress,
bmih.data_size,bmih.hresolution,bmih.vresolution,bmih.colors,bmih.colors_important);
//检测文件数据大小是否符合文件头
size = bmih.width*3;
size += size%4==0?0:4-size%4;
size *= bmih.height;
if(size != file_size-bmfh.data_offset){
fprintf(stderr,"位图的数据量与文件头所标识的数据量的长度不一致!\n");
fclose(fpin);
return 1;
}
if(bmih.bpp != 24){
fprintf(stderr,"不是24位位深的BMP位图,不被支持!\n");
fclose(fpin);
return 1;
}
buffer=(unsigned char*)malloc(size);
//printf("buffer大小:%d\n",size);
if(buffer==NULL){
fprintf(stderr,"分配文件缓冲区时出错!\n");
fclose(fpin);
return 1;
}
if(size != fread(buffer,1,size,fpin)){
fprintf(stderr,"读取位图数据时读取的长度不一致!\n");
free(buffer);
fclose(fpin);
return 1;
}
fclose(fpin);
//交换上下内存
for(;;){
int bytes_line = size/bmih.height;
int rows = bmih.height/2;
int it=0;
unsigned char* tmp = (unsigned char*)malloc(bytes_line);
while(it<rows){
memcpy(tmp,buffer+bytes_line*it,bytes_line);
memcpy(buffer+bytes_line*it,buffer+(bmih.height-1-it)*bytes_line,bytes_line);
memcpy(buffer+(bmih.height-1-it)*bytes_line,tmp,bytes_line);
it++;
}
free(tmp);
break;
}
//总像素点个数(一个像素3个字节),3个字节转换成2个字节,2个字节转成字符串需要7个字节空间(0x0000,)
//每行后面1个换行符(每行16个"0x0000,",2个字节),字符串开始的结束的字符串("unsigned char image[] = {" + 换行 + "};"
for(;;){
size_t pixels = bmih.width*bmih.height;
size_t str_length = pixels*7;
size_t crlf_count = pixels/16 + (pixels%16==0?0:1);
size_t prefix_length = sizeof("unsigned short image[] = {\r\n")-1 + sizeof("};\r\n")-1;
size_t total = str_length+crlf_count*2+prefix_length+1;
outout_data = (char*)malloc(total);
//printf("str:%d,crlf:%d,prefix:%d,total::%d\n",str_length,crlf_count*2,prefix_length,total);
if(outout_data == NULL){
fprintf(stderr,"申请保存数据用的缓冲区失败!\n");
free(buffer);
return 1;
}
printf("正在生成数据...\n");
for(;;){
char* ptr = outout_data;
unsigned char* pbuf = buffer;
int count = 0;
unsigned long lines;
int skip = (bmih.width*3%4)?(4-bmih.width*3%4):0;
int len;
len=sprintf(ptr,"unsigned short image[] = {\r\n");
ptr += len;
for(lines=0;lines<bmih.height;){
len=sprintf(ptr,"0x%04X,",(unsigned short)myrgb(*(int*)pbuf));
ptr += len;
count++;
if(count == 16){
count = 0;
len=sprintf(ptr,"\r\n");
ptr += len;
}
pbuf += 3;
if((unsigned long)pbuf-(unsigned long)buffer-lines*skip == bmih.width*3*(lines+1)){
pbuf += skip;
lines++;
}
}
if(count==0){
ptr -= 3;
len=sprintf(ptr,"\r\n");
ptr+=len;
}else{
--ptr;
len=sprintf(ptr,"\r\n");
ptr += len;
}
len=sprintf(ptr,"};\r\n");
ptr += len;
printf("生成成功!\n");
//printf("结尾指针:pbuf-buffer=%d,ptr-outout_data=%d\n",pbuf-buffer,ptr-outout_data);
len=fwrite(outout_data,1,(unsigned long)ptr-(unsigned long)outout_data,fpout);
if(len != (unsigned long)ptr-(unsigned long)outout_data){
fprintf(stderr,"写入数据的长度不等于待写入的要求!\n");
}else{
printf("已全部保存到文件!\n");
}
fclose(fpout);
free(buffer);
free(outout_data);
break;
}
break;
}
return 0;
}
|
