An EncoderParameter structure holds a parameter that can be passed to an image encoder. An EncoderParameter structure can also be used to receive a list of possible values supported by a particular parameter of a particular image encoder.

 

C++ Syntax

 

typedef struct EncoderParameter {

GUID Guid:

ULONG NumberOfValues;

ULONG Type;

void * Value;

};

 

FreeBASIC 语法

 

TYPE EncoderParameter

Guid AS GUID

NumberOfValues AS ULONG

Type AS ULONG

Value AS ANY PTR

END TYPE

 

成员

 

guid

 

Identifies the parameter category. GUIDs that represent various parameter categories (EncoderCompression, EncoderColorDepth, and the like) are defined in Gdiplusimaging.inc.

 

NumberOfValues

 

Number of values in the array pointed to by the Value data member.

 

type

 

Identifies the data type of the parameter. The EncoderParameterValueType enumeration in Gdiplusenums.inc defines several possible value types.

 

Value

 

Pointer to an array of values. Each value has the type specified by the Type data member.