Q: I have encountered one difficulty with assigning RGB color to a
text or path.
I intended to use R=37, G=64, B=97 parameters but result was
unexpected. The font just become transparent.
The code I have use fore coloring text:
element = builder.CreateTextRun("some text");
element.GetGState().SetFillColorSpace(ColorSpace.CreateDeviceRGB());
ColorPt blueColor = new ColorPt(37, 64, 97);
element.GetGState().SetFillColor(blueColor);
writer.WriteElement(element);
writer.WriteElement(builder.CreateTextEnd());
Wherever I assign all three parameters of ColorPt object the code
return transparent text.
What is the best way to assign a color to the text using RGB color
space family?
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A: In PDF all color component are floating point numbers in the range
between 0.0 to 1.0. To correct the problem simply divide the colorants
by 255.0. For example:
element.GetGState().SetFillColorSpace(ColorSpace.CreateDeviceRGB());
element.GetGState().SetFillColor(new ColorPt(37/255.0, 64/255.0,
97/255.0));