package org.apache.fop.fo.expr;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.datatypes.PercentBase;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.properties.ColorProperty;
import org.apache.fop.fo.properties.Property;
class CIELabColorFunction extends FunctionBase {
public int getRequiredArgsCount() {
return 6;
}
@Override
public PercentBase getPercentBase() {
return new CIELabPercentBase();
}
public Property eval(Property[] args, PropertyInfo pInfo) throws PropertyException {
float red = args[0].getNumber().floatValue();
float green = args[1].getNumber().floatValue();
float blue = args[2].getNumber().floatValue();
if ((red < 0 || red > 255) || (green < 0 || green > 255) || (blue < 0 || blue > 255)) {
throw new PropertyException("sRGB color values out of range. "
+ "Arguments to cie-lab-color() must be [0..255] or [0%..100%]");
}
float l = args[3].getNumber().floatValue();
float a = args[4].getNumber().floatValue();
float b = args[5].getNumber().floatValue();
if (l < 0 || l > 100) {
throw new PropertyException("L* value out of range. Valid range: [0..100]");
}
if (a < -127 || a > 127 || b < -127 || b > 127) {
throw new PropertyException("a* and b* values out of range. Valid range: [-127..+127]");
}
StringBuffer sb = new StringBuffer();
sb.append("cie-lab-color(" + red + "," + green + "," + blue + ","
+ l + "," + a + "," + b + ")");
FOUserAgent ua = (pInfo == null)
? null
: (pInfo.getFO() == null ? null : pInfo.getFO().getUserAgent());
return ColorProperty.getInstance(ua, sb.toString());
}
private static class CIELabPercentBase implements PercentBase {
public int getDimension() {
return 0;
}
public double getBaseValue() {
return 1.0f;
}
public int getBaseLength(PercentBaseContext context) {
return 0;
}
}
}