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ChangeFromWmf(IntPtr,Int32,Int32,RasterColor) Method

Summary

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

Syntax

C++

public static Leadtools.RasterImage ChangeFromWmf(  
   IntPtr hwmf, 
   int width, 
   int height, 
   Leadtools.RasterColor backColor 
)

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

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

Parameters

hwmf
Handle to the WMF to be changed.

width
Amount by which to scale the metafiles original width.

height
Amount by which to scale the metafiles 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, hwmf is freed.

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

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

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

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

If width > 0 and height > 0 - the 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 ChangeFromWmf(IntPtr, int, int).

Requirements

Target Platforms