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Custom Font Color
http://forum.pdfsharp.de/viewtopic.php?f=2&t=1587		 Page 1 of 1
Author:  slowjoe [ Mon Mar 21, 2011 2:00 am ]
Post subject:  Custom Font Color
Hi,

I have written a fairly simple C# windows app that draws a background image then text on top of it.
I can not seem to set the font color to a "custom" color (RGB or CMYK) but the predefined colors work.
The custom colors appear black. I hope I'm missing something simple.
Any help is appreciated.

Thank you,
Joe

Code:
            PdfDocument document = new PdfDocument();

            // Create a new page
            PdfPage page = document.AddPage();
            page.Size = PageSize.Letter;
            page.Orientation = PageOrientation.Portrait;
           
            XGraphics gfx = XGraphics.FromPdfPage(page, XPageDirection.Downwards);

            // Draw background
            gfx.DrawImage(XImage.FromFile("Background.pdf"), 0, 0);

            // Write on top of background with known colors
            gfx.DrawString("Name", new XFont("Garamond", 12, XFontStyle.Regular), XBrushes.Firebrick, 100, 670, XStringFormats.TopLeft);
            gfx.DrawString("Title", new XFont("Garamond", 10, XFontStyle.Italic), XBrushes.DodgerBlue, 100, 685, XStringFormats.TopLeft);
           
            // Write on top of background with custom colors
            // DOES NOT WORK, COMES OUT BLACK!!!!!!

            gfx.DrawString("Phone", new XFont("Garamond", 12, XFontStyle.Regular), new XSolidBrush(XColor.FromCmyk(62, 28, 2, 3)), 100, 700, XStringFormats.TopLeft);
            gfx.DrawString("Email", new XFont("Garamond", 10, XFontStyle.Regular), new XSolidBrush(XColor.FromCmyk(5, 95, 39, 16)), 100, 715, XStringFormats.TopLeft);

            // Save the document...
            document.Save("BackgroundWithText.pdf");
Author:  Thomas Hoevel [ Mon Mar 21, 2011 9:24 am ]
Post subject:  Re: Custom Font Color
Hi!

Please note that CMYK uses floating point numbers for the colour components.
Values >= 1 mean full saturation. So all colours you specify are black!

See also here:
http://www.pdfsharp.net/wiki/ColorsCMYK ... hx?HL=cmyk

You use CMYK colours, but you don't set the PDF file to CMYK mode. This should not make a big difference.
Author:  slowjoe [ Mon Mar 21, 2011 5:50 pm ]
Post subject:  Re: Custom Font Color
Hi Thomas,

Thanks for the quick reply. I won't be able to test it out untill tonight but it leads to my next question. Do I enter the CMKY values as a percentage of 255 or of 100. In other words, the values I tried (62, 28, 2, 3) were given to me from someone that uses photo shop. Should I enter 0.62, 0.28, 0.02, 0.03 or 62/255, 28/255 etc.? I guess I could just try each case myself but if you know that would be great.

Thanks again,
Joe
Author:  Thomas Hoevel [ Tue Mar 22, 2011 8:37 am ]
Post subject:  Re: Custom Font Color
slowjoe wrote:
Should I enter 0.62, 0.28, 0.02, 0.03 or 62/255, 28/255 etc.?

I'd go for 0.62, 0.28, 0.02, 0.03 (that's what the average photo shop user will expect to see).
Author:  slowjoe [ Tue Mar 22, 2011 2:25 pm ]
Post subject:  Re: Custom Font Color
Hi Thomas,

That was what I needed - the colors look right.

Thank you very much,
Joe
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