Windows Metafile

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Windows Metafile

The native vector graphics file format in Windows. Windows Metafiles also can hold bitmaps and text. The original 16-bit format uses the .WMF file extension. The subsequent 32-bit format, which supports more sophisticated graphics functions, generates .EMF (Enhanced MetaFile) files.

Actual Drawing Commands
WMF and EMF files are made up of Windows drawing commands (GDI calls), which results in an efficient format that renders illustrations very quickly. Metafiles are also used by programs to hold data between sessions, and Windows uses it for temporary storage in the Clipboard.

Standard and Placeable Versions
The standard WMF file uses an 18-byte header followed by GDI command records. There are two additional WMF variations that place another header in front of the standard header. A Placeable Metafile uses a 22-byte header containing x-y coordinates for positioning the image on the page. A Clipboard Metafile uses an 8- or 16-byte header. In an EMF file, all header information, including Placeable and Clipboard data, is stored in the first GDI command record.
References in periodicals archive ?
Support for EMF Files - SigmaPlot 11 now includes support for importing or exporting Enhanced Metafile Format (EMF) files, a new and improved 32-bit revision of the WMF format.
0 release adds support for Microsoft Word 97, Microsoft Excel 97, Microsoft PowerPoint 97, Lotus WordPro 97, Lotus Freelance 97, Lotus 1-2-3 97, Corel WordPerfect 8, Corel Presentations 8, Corel QuattroPro 8, XyWrite, Applix Words and Enhanced Metafile formats.
MS05-053: A vulnerability in the rendering of Windows Metafile (WMF) and Enhanced Metafile (EMF) image formats could allow an attacker to execute remote code and take complete control of an affected system.
Today's Microsoft Bulletin, includes vulnerabilities in the Windows Metafile (WMF) and Enhanced Metafile (EMF) image formats.
The first remotely exploitable security vulnerability is a graphics rendering issue that exists in Enhanced Metafile (EMF) and Windows Metafile (WMF) extensions within default installations across Windows 2000, Windows NT 4.
The critical discoveries include dangerous flaws in Windows Remote Procedure Call (RPC), Local Security Authority Subsystem Service (LSASS), and in the rendering of Windows Metafile (WMF) and Enhanced Metafile (EMF) image formats.
Among the graphic file formats that SnagIt now supports for reading and writing include: Windows Icon (ICO), Enhanced Metafile (EMF), Windows Metafile (WMF), Encapsulated Postscript (EPS), Adobe Photoshop 3.
Improved Printing Capabilities--includes extensive enhancements to printing support, including 24-bit color, Enhanced Metafile (EMF), optional transparency handling, color dithering method control and persistence of paper size and margins in workspaces.
It adds the ability to import graphics in HiJaak's extensive list of supported formats, including Windows Enhanced Metafile Format, into virtually any Windows 95 application.
Selections can be sent to the Windows clipboard as Enhanced Metafiles and bitmaps or saved to file for use in www and other documents.

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