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ChangeFromEmf(IntPtr,int,int,RasterColor) Method

Summary

Changes a Windows Enhanced Metafile (EMF) into a LEADTOOLS Leadtools.RasterImage object and, if successful, frees the Enhanced Metafile.

Syntax

C++

public static RasterImage ChangeFromEmf( 
   IntPtr hemf, 
   int width, 
   int height, 
   RasterColor backColor 
)

Public Overloads Shared Function ChangeFromEmf( _ 
   ByVal hemf As IntPtr, _ 
   ByVal width As Integer, _ 
   ByVal height As Integer, _ 
   ByVal backColor As Leadtools.RasterColor _ 
) As Leadtools.RasterImage

public: 
static Leadtools.RasterImage^ ChangeFromEmf(  
   IntPtr hemf, 
   int width, 
   int height, 
   Leadtools.RasterColor backColor 
)

Parameters

hemf
Handle to the EMF to be changed.

width
Amount by which to scale the enhanced metafile's original width.

height
Amount by which to scale the enhanced metafile's original height.

backColor
The color to use to fill the image area before painting the metafile objects.

Return Value

The newly created Leadtools.RasterImage object.

Remarks

Some metafiles do not have a background color, and hence, when the metafile is used to create a Leadtools.RasterImage object, the area not covered by the metafile objects will contain the default image background color (black). To create a raster image from a metafile like this with a specific background color, set the desired background color in the backColor parameter.

If this method is successful, hemf is freed.

The enhanced metafile can be loaded at the original dimension or scaled by using the width and height parameters.

If width == 0 and height == 0 - the enhanced metafile is loaded at the size present in the file.

If width == 0 and height > 0 - the enhanced metafile is stretched so that it has the height height (preserving the aspect ratio).

If width > 0 and height == 0 - the enhanced metafile is stretched so that it has the width width (preserving the aspect ratio).

If width > 0 and height > 0 - the enhanced metafile is stretched so that it has the width width and height height (the aspect ratio is ignored).

This method does not support signed images.

For more information refer to RasterImage and GDI/GDI+.

Example

For an example, refer to ChangeFromEmf(IntPtr, int, int).

Requirements

Target Platforms