Submit: rgb color values for PDF

[dustismo]

Hi,

Not sure what the best method to submit is, but since the code needed is extremely small I thought I would just post it here.

The following will add support for color in the form

rgb(255,0,0)
or
rgb(100%, 0%, 0%)

I noticed that hex values seem to work fine, though they are not documented.

here is the code for ITextUtils.java:

 /**
 * return a color value from a string specification.
 */
 public static Color colorValue(String colorName) {
 String clr = colorName.trim().toLowerCase();
 if (clr.startsWith("rgb"))
 return rgbStringToColor(clr);

 Color color = colorMap.get(clr);
 if (color == null) {
 color = Color.decode(clr);
 }
 return color;
 }

/*
 * Returns color of the form rgb(r,g,b) or rgb(r,g,b,a)
 * r,g,b,a values can be 0-255 or float values with a '%' sign
 */
public static Color rgbStringToColor(String rgbString) {
 String rgb[] = rgbString.split(",");
 int r = parseSingleChanel(rgb[0]);
 int g = parseSingleChanel(rgb[1]);
 int b = parseSingleChanel(rgb[2]);
 if (rgb.length != 4)
 return new Color(r,g,b);
 int a = parseSingleChanel(rgb[3]);
 return new Color(r,g,b,a);
}

public static int parseSingleChanel(String chanel) {
 if (chanel.contains("%")) {
 float percent = Float.parseFloat(chanel.replaceAll("[^0-9\\.]",""));
 return (int)(255 * (percent / 100));
 }
 return Integer.parseInt(chanel.replaceAll("[^0-9]", ""));
}

Hope this is useful,
Dustin

[ivanflorentin]

That would be a nice addition.

Are you using this?

[norman.richards]

If you open a JIRA issue and attach the code, it will make sure that the changes don't get lost in the mix here. It might be a week or so before I can get back to itext work.

Do you think this is a more natural way to write colors than then formats supported by Color.decode, which is what we can do now?

[dustismo]

created jira issue:
http://jira.jboss.org/jira/browse/JBSEAM-1165

I do think this is a natural way to do RGB colors, it conforms to CSS standard so I think most web devs should be familiar. The code above also has support for the alpha chanel (so would be like rgb(100%,0,0,50%) ) but the alpha doesn't seem to affect the rendered pdf.

thanks,
Dustin