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WICGifLogicalScreenDescriptorProperties enumeration (wincodec.h)

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

Syntax

typedef enum WICGifLogicalScreenDescriptorProperties {
  WICGifLogicalScreenSignature = 0x1,
  WICGifLogicalScreenDescriptorWidth = 0x2,
  WICGifLogicalScreenDescriptorHeight = 0x3,
  WICGifLogicalScreenDescriptorGlobalColorTableFlag = 0x4,
  WICGifLogicalScreenDescriptorColorResolution = 0x5,
  WICGifLogicalScreenDescriptorSortFlag = 0x6,
  WICGifLogicalScreenDescriptorGlobalColorTableSize = 0x7,
  WICGifLogicalScreenDescriptorBackgroundColorIndex = 0x8,
  WICGifLogicalScreenDescriptorPixelAspectRatio = 0x9,
  WICGifLogicalScreenDescriptorProperties_FORCE_DWORD = 0x7fffffff
} ;

Constants

 
WICGifLogicalScreenSignature
Value: 0x1
[VT_UI1		 VT_VECTOR] Indicates the signature property.
WICGifLogicalScreenDescriptorWidth
Value: 0x2
[VT_UI2] Indicates the width in pixels.
WICGifLogicalScreenDescriptorHeight
Value: 0x3
[VT_UI2] Indicates the height in pixels.
WICGifLogicalScreenDescriptorGlobalColorTableFlag
Value: 0x4
[VT_BOOL] Indicates the global color table flag. TRUE if a global color table is present; otherwise, FALSE.
WICGifLogicalScreenDescriptorColorResolution
Value: 0x5
[VT_UI1] Indicates the color resolution in bits per pixel.
WICGifLogicalScreenDescriptorSortFlag
Value: 0x6
[VT_BOOL] Indicates the sorted color table flag. TRUE if the table is sorted; otherwise, FALSE.
WICGifLogicalScreenDescriptorGlobalColorTableSize
Value: 0x7
[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
Value: 0x8
[VT_UI1] Indicates the index within the color table to use for the background (pixels not defined in the image).
WICGifLogicalScreenDescriptorPixelAspectRatio
Value: 0x9
[VT_UI1] Indicates the factor used to compute an approximation of the aspect ratio.
WICGifLogicalScreenDescriptorProperties_FORCE_DWORD
Value: 0x7fffffff

Requirements

Requirement Value
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