小编Hem*_*rma的帖子

我已经创建了一个C++结构来读取和验证JFIF文件格式的标头.结构如下......

#pragma pack(1)
typedef struct _JFIF_Header
{
    WORD SOIMarker;         // start of image marker
    WORD APP0_Marker;       // Application use marker
    WORD APP0_Length;       // Length of APP0 field
    BYTE Identifier[5];     // zero terminating string "JFIF",X'4A', X'46', X'49', X'46', X'00'
    BYTE Version[2];        // X'01',X'02'
    BYTE Units;             // units = 0:no units ;; units = 1:X and Y are dots per inch ;; units = 2:X and Y are dots per cm
    WORD XDensity;          // horizontal pixel density
    WORD YDensity;          // vertical pixel …