Pdf to image issue

[fabiencomte]

Hello,
When i render a pdf page containing text and schematics to an image, the text looks correct but the schematics have a black background (original is white).

Do you have an idea please ?

[evilduckz]

I was able to replicate this as well. doing a pdf to tiff with the rasterizer. The pdf contained a signature (using fill and sign) and upon conversion the tiff had a black box where the signature should have been. I did some additional research and the problem lies within the viewer. Soon as i open the pdf with the viewer (no conversion) the signature appears with a infilled black rectangle. I downloaded ghostscript and fed the same commands through the cmd prompt and received back the correct image with no black box for the signature

[fabiencomte]

Hello,
Could you give me your command please to do some tests ?

[evilduckz]

the easiest way to replicate this issue is to sign a pdf (using fill and sign) and then open it with the ghostscript.net viewer. The problem exists in the viewer anyways since that is the code the rasterizer uses. Please let me know if you need additional details.

[fabiencomte]

For you, the bug is in the viewer, right ?

[fabiencomte]

Hello,
With your command you use a different sDEVICE than the Library (that use display), right ?

[evilduckz]

If you run the ghostscript.net viewer the bug will present it self by opening a pdf that has a signature in it via a fill and sign.

The bug also presents it self via the command line (becuase the cmd line uses the ghostscript.net view code)

[Cabecinha84]

Hello,

I have found the same problem you have reported. pdfs with signatures, look with black background and wrong colors on the sign box.
I have tried debbuging ghostscript.net viewer but couldn`t find the ghostscript parameter that is missing or wrong that is causing this.
Did you find a solution using ghostscript.net?

Thank you.

[fabiencomte]

Hello,

No I have no solution, sorry…

[yuanshengyu]

Hello,
You can use DEVICE to avoid the problem.
GhostscriptJpegDevice dev = new GhostscriptJpegDevice(GhostscriptJpegDeviceType.Jpeg);
dev.GraphicsAlphaBits = GhostscriptImageDeviceAlphaBits.V_4;
dev.TextAlphaBits = GhostscriptImageDeviceAlphaBits.V_4;
dev.ResolutionXY = new GhostscriptImageDeviceResolution(dpi, dpi);
dev.InputFiles.Add(pdfPath);
dev.Pdf.FirstPage = startPage;
dev.Pdf.LastPage = endPage;
dev.CustomSwitches.Add("-dDOINTERPOLATE");
dev.OutputPath = string.Format("{0}\{1}_page-%03d.jpg", dstDir, name);
dev.Process(versionInfo, true, null);

[jhabjan]

Fixed in today's v.1.2.2. release.