// ---------------------------------------------------------------
// Identify
//
// Examines the data from inSource and determines if it is in a
// format that this translator knows how to work with.
//
// Preconditions:
//
// Parameters: inSource, where the data to examine is
//
// inFormat, a hint about the data in inSource,
// it is ignored since it is only a hint
//
// ioExtension, configuration settings for the
// translator
//
// outInfo, information about what data is in
// inSource and how well this translator
// can handle that data is stored here
//
// outType, The format that the user wants
// the data in inSource to be
// converted to
//
// Postconditions:
//
// Returns: B_NO_TRANSLATOR, if this translator can't handle
// the data in inSource
//
// B_ERROR, if there was an error converting the data to the host
// format
//
// B_BAD_VALUE, if the settings in ioExtension are bad
//
// B_OK, if this translator understand the data and there were
// no errors found
// ---------------------------------------------------------------
status_t
BaseTranslator::Identify(BPositionIO *inSource,
const translation_format *inFormat, BMessage *ioExtension,
translator_info *outInfo, uint32 outType)
{
switch (fTranGroup) {
case B_TRANSLATOR_BITMAP:
return BitsIdentify(inSource, inFormat, ioExtension,
outInfo, outType);
default:
return DerivedIdentify(inSource, inFormat, ioExtension,
outInfo, outType);
}
}
status_t
BaseTranslator::BitsIdentify(BPositionIO *inSource,
const translation_format *inFormat, BMessage *ioExtension,
translator_info *outInfo, uint32 outType)
{
status_t result;
result = BitsCheck(inSource, ioExtension, outType);
if (result == B_OK)
result = identify_bits_header(inSource, outInfo);
else if (result == B_OK + 1)
// if NOT B_TRANSLATOR_BITMAP, it could be an image in the
// derived format
result = DerivedIdentify(inSource, inFormat, ioExtension,
outInfo, outType);
return result;
}
status_t
BaseTranslator::BitsIdentify(BPositionIO *inSource,
const translation_format *inFormat, BMessage *ioExtension,
translator_info *outInfo, uint32 outType)
{
status_t result = BitsCheck(inSource, ioExtension, outType);
if (result == B_OK) {
TranslatorBitmap bitmap;
result = identify_bits_header(inSource, outInfo, &bitmap);
if (result == B_OK)
result = DerivedCanHandleImageSize(bitmap.bounds.Width() + 1.0,
bitmap.bounds.Height() + 1.0);
} else if (result >= B_OK) {
// if NOT B_TRANSLATOR_BITMAP, it could be an image in the
// derived format
result = DerivedIdentify(inSource, inFormat, ioExtension,
outInfo, outType);
}
return result;
}
