Is this page helpful?
public static RasterImage ChangeFromWmf(
IntPtr hwmf,
int width,
int height,
RasterColor backColor
)
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.
The newly created Leadtools.RasterImage object.
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.
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, use ChangeFromWmf(hemf, width, height, backColor).
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+.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
public void ChangeFromWmfExample()
{
RasterCodecs codecs = new RasterCodecs();
IntPtr hwmf;
// Load an image
using (RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"), 24, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Change to WMF
hwmf = RasterImageConverter.ChangeToWmf(image);
}
// Convert the WMF back to a RasterImage preserving the size
using (RasterImage image = RasterImageConverter.ChangeFromWmf(hwmf, 0, 0))
{
// Save it to disk
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Image1_ChangeFromWmf.bmp"), RasterImageFormat.Bmp, 24);
}
// Clean up
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}