//bmconv.c

#include #include#include#include"bmconv.h"

/*************************************************************************

文件名稱:bmconv.c/bmconv.h

文件功能:BMP提取到點陣RGB顯示

創建時間:2013-04-20

文件作者:女孩不哭

文件版本:1.0

文件說明:專用

*************************************************************************/__inline unsignedint myrgb(inta)

{

unsignedshort b = (a&0xff)>>3;

unsignedshort g = ((a&0xff00)>>10);

unsignedshort r = ((a&0xff0000)>>19);

unsignedint rgb = (b|(g<<5)|(r<<11));returnrgb;

}int main(void)

{char file[260];char file_out[260];char* pstr =NULL;

unsignedchar* 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("輸入BMP文件打開路徑:");

fgets(file,sizeof(file),stdin);

pstr= strrchr(file,'\n');if(pstr) *pstr = 0;

printf("輸入BMP文件保存路徑:");

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,"打開輸入文件錯誤!\n");return 1;

}

fpout= fopen(file_out,"wb");if(fpout==NULL){

fprintf(stderr,"打開輸出文件錯誤!\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,"讀取文件頭時錯誤!\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("文件頭結構體大小:%d\n"

"文件頭簽名:\'BM\'\n"

"文件大小:%u bytes\n"

"保留4字節值:%u\n"

"位圖數據距文件開始的偏移:%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,"讀取圖像信息頭錯誤!\n");return 1;

}

printf("圖像信息頭結構體大小:%d\n"

"圖像信息頭大小:%d bytes\n"

"位圖寬度: %u 像素\n"

"位圖高度: %u 像素\n"

"位圖面數: %d 面\n"

"位深: %d bpp\n"

"壓縮說明: %d\n"

"位圖數據大小: %u bytes\n"

"水平分辨率: %u 像素/米\n"

"垂直分辨率: %u 像素/米\n"

"使用的顏色數: %u\n"

"重要的顏色數: %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);//檢測文件數據大小是否符合文件頭

size = bmih.width*3;

size+= size%4==0?0:4-size%4;

size*=bmih.height;if(size != file_size-bmfh.data_offset){

fprintf(stderr,"位圖的數據量與文件頭所標識的數據量的長度不一致!\n");

fclose(fpin);return 1;

}if(bmih.bpp != 24){

fprintf(stderr,"不是24位位深的BMP位圖,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,"分配文件緩沖區時出錯!\n");

fclose(fpin);return 1;

}if(size != fread(buffer,1,size,fpin)){

fprintf(stderr,"讀取位圖數據時讀取的長度不一致!\n");

free(buffer);

fclose(fpin);return 1;

}

fclose(fpin);//交換上下內存

for(;;){int bytes_line = size/bmih.height;int rows = bmih.height/2;int it=0;

unsignedchar* tmp = (unsigned char*)malloc(bytes_line);while(it

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;

}//總像素點個數(一個像素3個字節),3個字節轉換成2個字節,2個字節轉成字符串需要7個字節空間(0x0000,)//每行后面1個換行符(每行16個"0x0000,",2個字節),字符串開始的結束的字符串("unsigned char image[] = {" + 換行 + "};"

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,"申請保存數據用的緩沖區失敗!\n");

free(buffer);return 1;

}

printf("正在生成數據...\n");for(;;){char* ptr =outout_data;

unsignedchar* pbuf =buffer;int count = 0;

unsignedlonglines;int skip = (bmih.width*3%4)?(4-bmih.width*3%4):0;intlen;

len=sprintf(ptr,"unsigned short image[] = {\r\n");

ptr+=len;for(lines=0;lines

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("結尾指針: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,"寫入數據的長度不等于待寫入的要求!\n");

}else{

printf("已全部保存到文件!\n");

}

fclose(fpout);

free(buffer);

free(outout_data);break;

}break;

}return 0;

}

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