/**
* Method called by the processAllColorSpace if the ColorSpace to check is Separation. Because
* this kind of ColorSpace can have an alternate color space, the processAllColorSpace is called
* to check this alternate color space. (Indexed, Separation, DeviceN and Pattern can't be a Base
* color space)
*
* @param colorSpace the color space object to check.
*/
protected void processSeparationColorSpace(PDColorSpace colorSpace) {
try {
COSBase cosAlt = ((COSArray) colorSpace.getCOSObject()).getObject(2);
PDColorSpace altCol = PDColorSpace.create(cosAlt);
if (altCol != null) {
ColorSpaces acs = ColorSpaces.valueOf(altCol.getName());
switch (acs) {
case Separation:
case DeviceN:
case Pattern:
case Indexed:
case I:
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE_ALTERNATE,
acs.getLabel() + " color space can't be used as alternate color space"));
break;
default:
processAllColorSpace(altCol);
}
}
} catch (IOException e) {
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE,
"Unable to read Separation color space : " + e.getMessage(),
e));
}
}
/**
* Method called by the validate method. According to the ColorSpace, a specific ColorSpace method
* is called.
*
* @param colorSpace the color space object to check.
*/
protected final void processAllColorSpace(PDColorSpace colorSpace) {
ColorSpaces cs = ColorSpaces.valueOf(colorSpace.getName());
switch (cs) {
case DeviceRGB:
case RGB:
processRGBColorSpace(colorSpace);
break;
case DeviceCMYK:
case CMYK:
processCYMKColorSpace(colorSpace);
break;
case CalRGB:
case CalGray:
case Lab:
processCalibratedColorSpace(colorSpace);
break;
case DeviceGray:
case G:
processGrayColorSpace(colorSpace);
break;
case ICCBased:
processICCBasedColorSpace(colorSpace);
break;
case DeviceN:
processDeviceNColorSpace(colorSpace);
break;
case Indexed:
case I:
processIndexedColorSpace(colorSpace);
break;
case Separation:
processSeparationColorSpace(colorSpace);
break;
case Pattern:
processPatternColorSpace(colorSpace);
break;
default:
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_UNKNOWN_COLOR_SPACE,
cs.getLabel() + " is unknown as ColorSpace"));
}
}
/**
* Method called by the processAllColorSpace if the ColorSpace to check is Indexed. Because this
* kind of ColorSpace can have a Base color space, the processAllColorSpace is called to check
* this base color space. (Indexed and Pattern can't be a Base color space)
*
* @param colorSpace the color space object to check.
*/
protected void processIndexedColorSpace(PDColorSpace colorSpace) {
PDIndexed indexed = (PDIndexed) colorSpace;
PDColorSpace based = indexed.getBaseColorSpace();
ColorSpaces cs = ColorSpaces.valueOf(based.getName());
if (cs == ColorSpaces.Indexed || cs == ColorSpaces.I) {
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE_INDEXED,
"Indexed color space can't be used as Base color space"));
return;
}
if (cs == ColorSpaces.Pattern) {
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE_INDEXED,
"Pattern color space can't be used as Base color space"));
return;
}
processAllColorSpace(based);
}
/**
* Method called by the processAllColorSpace if the ColorSpace to check is a ICCBased color space.
* Because this kind of ColorSpace can have alternate color space, the processAllColorSpace is
* called to check this alternate color space. (Pattern is forbidden as Alternate Color Space)
*
* @param colorSpace the color space object to check.
*/
protected void processICCBasedColorSpace(PDColorSpace colorSpace) {
PDICCBased iccBased = (PDICCBased) colorSpace;
try {
ICC_Profile.getInstance(iccBased.getPDStream().createInputStream());
PDColorSpace altpdcs = iccBased.getAlternateColorSpace();
if (altpdcs != null) {
ColorSpaces altCsId = ColorSpaces.valueOf(altpdcs.getName());
if (altCsId == ColorSpaces.Pattern) {
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_PATTERN_COLOR_SPACE_FORBIDDEN,
"Pattern is forbidden as AlternateColorSpace of a ICCBased"));
}
/*
* According to the ISO-19005-1:2005
*
* A conforming reader shall render ICCBased colour spaces as specified by the ICC specification,
* and shall not use the Alternate colour space specified in an ICC profile stream dictionary
*
* We don't check the alternate ColorSpaces
*/
}
} catch (IllegalArgumentException e) {
// this is not a ICC_Profile
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE_ICCBASED,
"ICCBased color space is invalid: " + e.getMessage(),
e));
} catch (IOException e) {
context.addValidationError(
new ValidationError(
ERROR_GRAPHIC_INVALID_COLOR_SPACE,
"Unable to read ICCBase color space: " + e.getMessage(),
e));
}
}
