写位图到文件

typedef struct{ WORD bfType; //位图文件的类型，必须为BM DWORD bfSize; WORD bfReserved1; WORD bfReserved2; DWORD bfOffBits; }BMPFILEHEADER; typedef struct{ DWORD biSize; LONG biWidth; LONG biHeight; WORD biPlanes; WORD biBitCount; DWORD biCompression; DWORD biSizeImage; LONG biXPelsPerMeter; LONG biYPelsPerMeter; DWORD biClrUsed; DWORD biClrImportant; }BMPINFOHEADER; /* * 参数说明： * pData为rgb24数据， width为位图宽度， height为位图高度， filename为位图文件的名字 */ void Snapshot(BYTE *pData, int width, int height, char *filename) { long size; BMPFILEHEADER bfh; BMPINFOHEADER bih; FILE *fp; size = width*height*3; //每个像素点上有3个字节，分别用来表示r,g,b的颜色 bfh.bfType = 0x4d42; bfh.bfSize = size + sizeof(BMPFILEHEADER) + sizeof(BMPINFOHEADER); bfh.bfReserved1 = 0; bfh.bfReserved2 = 0; bfh.bfOffBits = bfh.bfSize - size; //RGB24位图结构体的通用定义 bih.biSize = sizeof(BMPINFOHEADER); bih.biWidth = width; bih.biHeight = height; bih.biPlanes = 1; bih.biBitCount = 24; bih.biCompression = 0; bih.biSizeImage = size; bih.biXPelsPerMeter = 0; bih.biYPelsPerMeter = 0; bih.biClrUsed = 0; bih.biClrImportant = 0; fp = fopen(filename, "wb"); if(!fp) return; fwrite(&bfh, 1, sizeof(BMPFILEHEADER), fp); fwrite(&bih, 1, sizeof(BMPINFOHEADER), fp); fwrite(pData, 1, size, fp); fclose(fp); }