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WICGifLogicalScreenDescriptorProperties enumeration

Specifies the logical screen descriptor properties for Graphics Interchange Format (GIF) metadata.

Syntax


typedef enum WICGifLogicalScreenDescriptorProperties { 
  WICGifLogicalScreenSignature                       = 0x00000001,
  WICGifLogicalScreenDescriptorWidth                 = 0x00000002,
  WICGifLogicalScreenDescriptorHeight                = 0x00000003,
  WICGifLogicalScreenDescriptorGlobalColorTableFlag  = 0x00000004,
  WICGifLogicalScreenDescriptorColorResolution       = 0x00000005,
  WICGifLogicalScreenDescriptorSortFlag              = 0x00000006,
  WICGifLogicalScreenDescriptorGlobalColorTableSize  = 0x00000007,
  WICGifLogicalScreenDescriptorBackgroundColorIndex  = 0x00000008,
  WICGifLogicalScreenDescriptorPixelAspectRatio      = 0x00000009
} WICGifLogicalScreenDescriptorProperties;

Constants

WICGifLogicalScreenSignature

[VT_UI1 | VT_VECTOR] Indicates the signature property.

WICGifLogicalScreenDescriptorWidth

[VT_UI2] Indicates the width in pixels.

WICGifLogicalScreenDescriptorHeight

[VT_UI2] Indicates the height in pixels.

WICGifLogicalScreenDescriptorGlobalColorTableFlag

[VT_BOOL] Indicates the global color table flag. TRUE if a global color table is present; otherwise, FALSE.

WICGifLogicalScreenDescriptorColorResolution

[VT_UI1] Indicates the color resolution in bits per pixel.

WICGifLogicalScreenDescriptorSortFlag

[VT_BOOL] Indicates the sorted color table flag. TRUE if the table is sorted; otherwise, FALSE.

WICGifLogicalScreenDescriptorGlobalColorTableSize

[VT_UI1] Indicates the value used to calculate the number of bytes contained in the global color table.

To calculate the actual size of the color table, raise 2 to the value of the field + 1.

WICGifLogicalScreenDescriptorBackgroundColorIndex

[VT_UI1] Indicates the index within the color table to use for the background (pixels not defined in the image).

WICGifLogicalScreenDescriptorPixelAspectRatio

[VT_UI1] Indicates the factor used to compute an approximation of the aspect ratio.

Requirements

Minimum supported client

Windows 7, Windows Vista with SP2 and Platform Update for Windows Vista [desktop apps only]

Minimum supported server

Windows Server 2008 R2, Windows Server 2008 with SP2 and Platform Update for Windows Server 2008 [desktop apps only]

Header

Wincodec.h

IDL

Wincodec.idl

 

 

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