读取 bmp 文件头信息， read bmp infomation_modelsim 读取bmp文件-优快云博客

本文链接：https://blog.youkuaiyun.com/carlsonlee_freec/article/details/6233780

本文介绍了一个用于读取BMP图像文件头信息的C语言程序。该程序定义了BMP文件头的数据结构，并通过一系列fread函数从指定的BMP文件中读取各个字段的数据。读取完成后，程序将打印出文件头中的关键信息。

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#include <stdio.h>

typedef signed char         INT8;
typedef signed short        INT16;
typedef signed int          INT32;
typedef unsigned char       UINT8;
typedef unsigned short      UINT16;
typedef unsigned int        UINT32;

typedef struct tagBITMAPINFOHEADER
{
   UINT16       ID;
   UINT32       biSize;
   UINT32       biReserve;
   UINT32       biDataOffset;
   UINT32       biHeaderSize;
   UINT32       biWidth;
   UINT32       biHeight;
   UINT16       biPlanes;
   UINT16       biBitCount;
   UINT32       biCompression;
   UINT32       biSizeImage;
   UINT32       biXPelsPerMeter;
   UINT32       biYPelsPerMeter;
   UINT32       biColor;
   UINT32       biClrImportant;
}BitmapIfoHeader;

static void ReadBmpHeader(FILE *fp, BitmapIfoHeader *pBmpHeader)
{
   if(pBmpHeader==NULL || fp==NULL)
       return;
   fread((void*)&pBmpHeader->ID, 1, 2, fp);
   fread((void*)&pBmpHeader->biSize, 1, 4, fp);
   fread((void*)&pBmpHeader->biReserve, 1, 4, fp);
   fread((void*)&pBmpHeader->biDataOffset, 1, 4, fp);
   fread((void*)&pBmpHeader->biHeaderSize, 1, 4, fp);
   fread((void*)&pBmpHeader->biWidth, 1, 4, fp);
   fread((void*)&pBmpHeader->biHeight, 1, 4, fp);
   fread((void*)&pBmpHeader->biPlanes, 1, 2, fp);
   fread((void*)&pBmpHeader->biBitCount, 1, 2, fp);
   fread((void*)&pBmpHeader->biCompression, 1, 4, fp);
   fread((void*)&pBmpHeader->biSizeImage, 1, 4, fp);
   fread((void*)&pBmpHeader->biXPelsPerMeter, 1, 4, fp);
   fread((void*)&pBmpHeader->biYPelsPerMeter, 1, 4, fp);
   fread((void*)&pBmpHeader->biColor, 1, 4, fp);
   fread((void*)&pBmpHeader->biClrImportant, 1, 4, fp);
}

int main(int argc,char *argv[])
{
   FILE *fp = NULL;
   BitmapIfoHeader bmpInfo = {0};
   if(argc<1)
       return 0;
   fp = fopen(argv[1], "rb");
   if(fp == NULL)
       return 0;
   ReadBmpHeader(fp, &bmpInfo);

   printf("ID = %d/n", bmpInfo.ID);
   printf("biSize = %d/n", bmpInfo.biSize);
   printf("biDataOffset = %d/n", bmpInfo.biDataOffset);
   printf("biHeaderSize = %d/n", bmpInfo.biHeaderSize);
   printf("biWidth = %d/n", bmpInfo.biWidth);
   printf("biHeight = %d/n", bmpInfo.biHeight);
   printf("biBitCount = %d/n", bmpInfo.biBitCount);
   printf("biCompression = %d/n", bmpInfo.biCompression);
   printf("biSizeImage = %d/n", bmpInfo.biSizeImage);
   printf("biXPelsPerMeter = %d/n", bmpInfo.biXPelsPerMeter);
   printf("biYPelsPerMeter = %d/n", bmpInfo.biYPelsPerMeter);
   fclose(fp);
   return 1;
}