Where to set image W and H when converting PDF to Image, PdfReadDefines.FitPage VS MagickImage.Resize

[tomasr78]

I am converting PDF to Image and a little confused what is the proper way to set the final Image dimension.

I have tried to do that using PdfReadDefines class and assign MagickGeometry to PdfReadDefines.FitPage property, it reduces the image dimension but not to 400px.

var pdfReadDefines = new PdfReadDefines();
var magickGeometry = new MagickGeometry(400, 400) //Resize to max 400 one of dimensions and keep image proporition
       {
           IgnoreAspectRatio = false,
            Greater = true
         };
pdfReadDefines.Interpolate = true;
pdfReadDefines.FitPage = magickGeometry;

var magickReadSettings = new MagickReadSettings
{
   Density = new Density(300,300),
   ColorSpace = ColorSpace.sRGB
};

magickReadSettings.Defines = pdfReadDefines;

To solve this, I am resizing the image one more time using the method MagickImage.Resize(magickGeometry).

I would like to understand what pdfReadDefines.FitPage does and I know that GhostScript accepts image dimension properties, then how to set it?

[dlemstra]

When you specify the fitpage the image will be fit inside the dimensions that you are specifying. The maximum size will be 400x400 in your example.

[tomasr78]

I have found that MagickReadSettings.Density property changes the geometry of an image. If I leave Density not set the image has correct geometry like it is set in MagickGeometry class, but if I set Density the geometry changes.

[dlemstra]

That is happening because setting the width and height internally changes the density (when its not set)