An ImageCodecInfo structure stores information about an image codec (encoder/decoder). GDI+ provides several built-in image codecs. You can obtain information about those codecs by calling the GetImageEncoders function and the GetImageDecoders function. Each of those functions returns an array of ImageCodecInfo structures, one for each available encoder or decoder.

 

C++ Syntax

 

typedef struct ImageCodecInfo {

CLSID ClassID;

GUID FormatID;

WCHAR * CodecName;

WCHAR * DllName;

WCHAR * FormatDescription;

WCHAR * FilenameExtension;

WCHAR * MimeType;

DWORD Flags;

DWORD Version;

DWORD SigCount;

DWORD SigSize;

BYTE * SigPattern;

BYTE * SigMask;

};

 

FreeBASIC 语法

 

TYPE ImageCodecInfo

Clsid AS CLSID

FormatID AS GUID

CodecName AS WCHAR PTR

DllName AS WCHAR PTR

FormatDescription AS WCHAR PTR

FilenameExtension AS WCHAR PTR

MimeType AS WCHAR PTR

Flags AS DWORD

Version AS DWORD

SigCount AS DWORD

SigSize AS DWORD

SigPattern AS UBYTE PTR

SigMask AS UBYTE PTR

END TYPE

 

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ClassID

 

Codec identifier.

 

FormatID

 

File format identifier. GUIDs that identify various file formats (ImageFormatBMP, ImageFormatEMF, and the like) are defined in Gdiplusimaging.inc.

 

CodecName

 

Pointer to a null-terminated wide string that contains the codec name.

 

DllName

 

Pointer to a null-terminated wide string that contains the path name of the DLL in which the codec resides. If the codec is not in a DLL, this pointer is NULL.

 

FormatDescription

 

Pointer to a null-terminated wide string that contains the name of the file format used by the codec.

 

FilenameExtension

 

Pointer to a null-terminated wide string that contains all file-name extensions associated with the codec. The extensions are separated by semicolons.

 

MimeType

 

Pointer to a null-terminated wide string that contains the mime type of the codec.

 

Flags

 

Combination of flags from the ImageCodecFlags enumeration.

 

Version

 

Integer that indicates the version of the codec.

 

SigCount

 

Integer that indicates the number of signatures used by the file format associated with the codec.

 

SigSize

 

Integer that indicates the number of bytes in each signature.

 

SigPattern

 

Pointer to an array of bytes that contains the pattern for each signature.

 

SigMask

 

Pointer to an array of bytes that contains the mask for each signature.