Poor exported PNG quality and text cutting

Thank you so much for this great extension.

First issue My text gets cutted. Se the numbers in the images.

Next “issiue” I have installed the extension on my vb.net server and I am linking to a function (called latex2png - see below) in the code:

Shared Function latex2png(latex As String) As MemoryStream
        Dim parser = New TexFormulaParser()
        Dim formula = parser.Parse(latex)
        formula.GetRenderer(TexStyle.Script, 15.0, "Arial")

        Dim pngBytes = formula.RenderToPng(15.0, 0.0, 0.0, "Arial")
        Dim latexpng As New MemoryStream(pngBytes)

        Return latexpng
    End Function

Everything is working great, but sadly the quality of the image could be much better. Is there any way to get a higher quality of the png image that is created? Hope you can help me.

Seems like making the scale bigger is better. But the image gets to large in the end.

SCALE 12

SCALE 15

SCALE 25

BTW. I am writing the code in vb.net in aspx, and I am a novice. So go easy on me, when explaining. 😃

Kind regards Troels Christensen

[ForNeVeR]

Alright, after some additional research I have the working prototype. There’re two problems:

1. “Text cutting”: with default settings, some of the letter elements are sometimes drawn out of bounds of our images. See image attached (this is SVG, but it has the same problems anyway): Solution: Fix the images by adding a TranslateTransform to them if they’re out of bounds.
2. Images generated by TexRenderer.RenderToBitmap have poor resolution by default (something like 96 DPI because that’s the default resolution for “Display Independent Pixels”). Solution: Allow the users to define their own resolution instead of the default one.

[ForNeVeR]

@troelschristensen one of the quality solutions for now would be to use SVG instead of PNG. Take a look at our example project: it has the stuff to render the formula into SVG image, it will scale much better.

I was able to reproduce your “cutting” issue and I’m investigating it.