read-bmp.rar_BMP 读取_Read_bmp.c_VC bmp_bmp_read bmp

#include "read_bmp.h" int Load_BMP(const char *file_name, BMP_Data *bmp_data) { struct BMP_File_Header bmp_file_header; struct BMP_Image_Header bmp_image_header; FILE *bmp_file; if( !(bmp_file = fopen(file_name, "rb")) ) return 0; fread( &bmp_file_header, sizeof bmp_file_header, 1, bmp_file); fread( &bmp_image_header, sizeof bmp_image_header, 1, bmp_file); if( *((char *)&bmp_file_header.type) != 'B' && *(((char *)&bmp_file_header.type)+1) != 'M' && bmp_image_header.depth != 24 ) { fclose( bmp_file ); return 0; } bmp_data->width = bmp_image_header.width; bmp_data->height = bmp_image_header.height; bmp_data->data = (char *)malloc( bmp_image_header.size ); fseek( bmp_file, bmp_file_header.l_data_offset, SEEK_SET); fread( bmp_data->data, bmp_image_header.size, 1, bmp_file); fclose( bmp_file ); return 1; } int Save_BMP(const char *file_name, const BMP_Data *bmp_data) { struct BMP_File_Header bmp_file_header; struct BMP_Image_Header bmp_image_header; FILE *bmp_file; if( !(bmp_file = fopen(file_name, "rb")) ) return 0; fread( &bmp_file_header, sizeof bmp_file_header, 1, bmp_file); fread( &bmp_image_header, sizeof bmp_image_header, 1, bmp_file); if( *((char *)&bmp_file_header.type) != 'B' || *(((char *)&bmp_file_header.type)+1) != 'M' || bmp_image_header.depth != 24 || bmp_data->width != bmp_image_header.width || bmp_data->height != bmp_image_header.height ) { fclose( bmp_file ); return 0; } fclose( bmp_file ); if( !(bmp_file = fopen(file_name, "wb")) ) return 0; fwrite( &bmp_file_header, sizeof bmp_file_header, 1, bmp_file); fwrite( &bmp_image_header, sizeof bmp_image_header, 1, bmp_file); fwrite( bmp_data->data, bmp_data->width * bmp_data->height * 3, 1, bmp_file); fclose(bmp_file); return 1; }