能生成BMP

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| 16937996| 能生成BMP| 2022-11-30T11:54:00| | BlogPost|

能生成BMP

http://bbs.bccn.net/thread-336164-1-1.html    为何该程序生成的BMP图像打不开？？

 

程序代码：

 

#include <stdio.h>

#include <time.h>

#include <stdlib.h>

#include <malloc.h>

#include <conio.h>

#include <pshpack2.h>

#include <poppack.h>

 

typedef unsigned char BYTE;

typedef unsigned short WORD;

typedef unsigned long DWORD;

 

 

/*定义位图文件头*/

typedef struct tag_BIT_MAP_FILE_HEADER

{

WORD bfType;

DWORD bfSize;

WORD bfReserved1;

WORD bfReserved2;

DWORD bfOffBits;

} BIT_MAP_FILE_HEADER;

 

/*定义信息头*/

typedef struct tagBIT_MAP_INFO_HEADER

{

DWORD biSize;

DWORD biWidth;

DWORD biHeight;

WORD biPlanes;

WORD biBitCount;

DWORD biCompression;

DWORD biSizeImage;

DWORD biXPelsPerMeter;

DWORD biYPelsPerMeter;

DWORD biClrUsed;

DWORD biClrImportant;

} BIT_MAP_INFO_HEADER;

 

/*调色板*/

typedef struct tagRGB

{

BYTE blue;

BYTE green;

BYTE red;

} RGB;

 

 

 

int main()

{

RGB *bmp_data = NULL;

FILE *bmp_file;

long i;

long width = 80;

long height = 80;

long date_size = width*height;

BIT_MAP_FILE_HEADER bmp_map_file;

BIT_MAP_INFO_HEADER bmp_map_info;

 

if((bmp_file=fopen("cubs.bmp", "wb+")) == NULL)

{

printf("Error!\n");

system("pause");

exit(0);

}

/*写入图位文件头*/

bmp_map_file.bfType = 0x4d42;

bmp_map_file.bfSize = 14 + 40 + width * height * 3;

bmp_map_file.bfReserved1 = 0;

bmp_map_file.bfReserved2 = 0;

bmp_map_file.bfOffBits = 0x36;

fwrite(&bmp_map_file, sizeof(BIT_MAP_FILE_HEADER), 1, bmp_file);

 

/*写入信息头*/

bmp_map_info.biSize = 40;

bmp_map_info.biPlanes = 1;

bmp_map_info.biHeight = height;

bmp_map_info.biWidth = width;

bmp_map_info.biBitCount = 24;

bmp_map_info.biClrImportant = 0;

bmp_map_info.biClrUsed = 0;

bmp_map_info.biSizeImage = width*height*3;

bmp_map_info.biCompression = 0;

bmp_map_info.biXPelsPerMeter = 0;

bmp_map_info.biYPelsPerMeter = 0;

fwrite(&bmp_map_info, sizeof(BIT_MAP_INFO_HEADER), 1, bmp_file);

 

/*给图像分配内存*/

if((bmp_data=(RGB*)malloc(width * height * 3)) == NULL)

{

printf("申请内存失败！\n");

exit(0);

}

/*RGB赋值并写入文件中*/

for(i= 0; i<width*height; i++)

{

bmp_data[i].green=255;

bmp_data[i].red=0;

bmp_data[i].blue=0;

}

fwrite(bmp_data, sizeof(RGB), date_size, bmp_file);

 

printf("BMP图像生成成功！\n\n\n");

fclose(bmp_file);

free(bmp_data);

bmp_data = NULL;

return 0;

}

 

 

//============================================================================================

 

#pragma pack(push)

#pragma pack(1)

 

/*定义位图文件头*/

typedef struct tag_BIT_MAP_FILE_HEADER

{

WORD bfType;

DWORD bfSize;

WORD bfReserved1;

WORD bfReserved2;

DWORD bfOffBits;

} BIT_MAP_FILE_HEADER;

 

/*定义信息头*/

typedef struct tagBIT_MAP_INFO_HEADER

{

DWORD biSize;

DWORD biWidth;

DWORD biHeight;

WORD biPlanes;

WORD biBitCount;

DWORD biCompression;

DWORD biSizeImage;

DWORD biXPelsPerMeter;

DWORD biYPelsPerMeter;

DWORD biClrUsed;

DWORD biClrImportant;

} BIT_MAP_INFO_HEADER;

 

/*调色板*/

typedef struct tagRGB

{

BYTE blue;

BYTE green;

BYTE red;

} RGB;

 

#pragma pack(pop)

 

如果你用的是VC，这样改一下再编译就行了 

| 648658| | 2022-11-30T11:54:00| false| | 2022-11-30T11:53:31.437| true| 能生成BMP http://bbs.bccn.net/thread-336164-1-1.html 为何该程序生成的BMP图像打不开？？ 程序代码： #include <stdio.h> #include <time.h> #include <stdlib.h> #include <malloc.h| Anonymous|