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Conversion from DXF to JPG doesn't always scale correctly

Aspose.CAD Product Family
#1

Hello,
I’m using Aspose.CAD (.NET) to covert a DXF file to JPG (output image size 1000 x 1000).
I want that the rasterized drawing to scale to fit the 1000 x 1000 area while keeping its ratio and
with many DXF file this operation works as expected however with a few DXF files the output drawing only fill around 1/4 of the space.
I verified this unexpected behaviour with both version 20.7.0 and 20.9.1 of Aspose.CAD.
Can you give me some feedback?

Here the code I use and an attachment with a DXF file that gives issues:

using (Aspose.CAD.FileFormats.Cad.CadImage cadImage = (Aspose.CAD.FileFormats.Cad.CadImage)Aspose.CAD.Image.Load(filename))
{
Aspose.CAD.Rectangle rect = cadImage.Bounds;
var options = new Aspose.CAD.ImageOptions.JpegOptions();
Aspose.CAD.ImageOptions.CadRasterizationOptions rasterizationOptions = new CadRasterizationOptions()
{
BackgroundColor = Aspose.CAD.Color.White,
PageHeight = 1000,
PageWidth = 1000,
DrawType = Aspose.CAD.FileFormats.Cad.CadDrawTypeMode.UseObjectColor
};
options.VectorRasterizationOptions = rasterizationOptions;

                            // save DXF as a JPEG 
                           cadImage.Save(Path.GetDirectoryName(filename) + "\\" + Path.GetFileNameWithoutExtension(filename) + ".jpg", options);

}

0700410_01_B-1.dxf.zip (108.8 KB)

#2

Hello,

try adding Layout to rasterizationoptions

In java i do it as below

CadRasterizationOptions rasterizationOptions = new CadRasterizationOptions();
rasterizationOptions.setUnitType(UnitType.Millimeter);
rasterizationOptions.setBackgroundColor(Color.getWhite());
rasterizationOptions.setPageWidth(420);
rasterizationOptions.setPageHeight(297);
// rasterizationOptions.setExportAllLayoutContent(true);
rasterizationOptions.setLayouts(new String[] { “Model” });

#3

Thanks for your reply.
I tried with yours rasterization options but the problem persisted (I repeat so not to be misunderstood that this issue happen only with a few DXF files like the one I attached):

Aspose.CAD.ImageOptions.CadRasterizationOptions rasterizationOptions = new CadRasterizationOptions()
{
BackgroundColor = Aspose.CAD.Color.White,
PageHeight = 1000,
PageWidth = 1000,
UnitType = UnitType.Millimeter,
Layouts = new string[] { “Model” }

                            };
#4

@kymossrl

Please provide the output file that you are getting in your end along with desired output that you want to achieve so that we may judge the difference and try helping you further.

#5

Here a compressed file with two output images.
The one with the name that start with “Scaled wrongly” has the drawing rasterized within 1/4 of the actual image area (1000 x 1000), the file with the name that start with “Scaled correctly” you can see how the drawing fit the the image area as expected.
The output JPG with the name that start with “Scaled wrongly” is the result of the input DXF that I’ve attached in the first post.

Output JPG.zip (78.2 KB)

#6

@kymossrl

I have opened a ticket with ID CADNET-1218 in our issue tracking system to further investigate the scaling related issue on our end. This thread has been linked with the issue so that you may be notified once the issue will be fixed.