public ResultList encode(Version version)
{
if (version == null)
{
// compute minimal encoding trying the three version sizes.
Version[] versions =
{
getVersion(VersionSize.SMALL),
getVersion(VersionSize.MEDIUM),
getVersion(VersionSize.LARGE)
};
ResultList[] results =
{
encodeSpecificVersion(versions[0]),
encodeSpecificVersion(versions[1]),
encodeSpecificVersion(versions[2])
};
int smallestSize = Int32.MaxValue;
int smallestResult = -1;
for (int i = 0; i < 3; i++)
{
int size = results[i].Size;
if (Encoder.willFit(size, versions[i], ecLevel) && size < smallestSize)
{
smallestSize = size;
smallestResult = i;
}
}
if (smallestResult < 0)
{
throw new WriterException("Data too big for any version");
}
return(results[smallestResult]);
}
else
{
// compute minimal encoding for a given version
ResultList result = encodeSpecificVersion(version);
if (!Encoder.willFit(result.Size, getVersion(getVersionSize(result.getVersion())), ecLevel))
{
throw new WriterException("Data too big for version" + version);
}
return(result);
}
}
public ResultList(Version version, Edge solution, MinimalEncoder encoder)
{
this.encoder = encoder;
this.version = version;
var length = 0;
var current = solution;
var containsECI = false;
while (current != null)
{
length += current.characterLength;
Edge previous = current.previous;
bool needECI = current.mode == Mode.BYTE &&
(previous == null && current.charsetEncoderIndex != 0) || // at the beginning and charset is not ISO-8859-1
(previous != null && current.charsetEncoderIndex != previous.charsetEncoderIndex);
if (needECI)
{
containsECI = true;
}
if (previous == null || previous.mode != current.mode || needECI)
{
list.Insert(0, new ResultNode(current.mode, current.fromPosition, current.charsetEncoderIndex, length, encoder, this));
length = 0;
}
if (needECI)
{
list.Insert(0, new ResultNode(Mode.ECI, current.fromPosition, current.charsetEncoderIndex, 0, encoder, this));
}
current = previous;
}
// prepend FNC1 if needed. If the bits contain an ECI then the FNC1 must be preceeded by an ECI.
// If there is no ECI at the beginning then we put an ECI to the default charset (ISO-8859-1)
if (encoder.isGS1)
{
var first = list[0];
if (first != null && first.mode != Mode.ECI && containsECI)
{
// prepend a default character set ECI
list.Insert(0, new ResultNode(Mode.ECI, 0, 0, 0, encoder, this));
}
first = list[0];
// prepend or insert a FNC1_FIRST_POSITION after the ECI (if any)
var node = new ResultNode(Mode.FNC1_FIRST_POSITION, 0, 0, 0, encoder, this);
if (first == null || first.mode != Mode.ECI)
{
list.Insert(0, node);
}
else
{
list.Insert(1, node);
}
}
// set version to smallest version into which the bits fit.
int versionNumber = version.VersionNumber;
int lowerLimit;
int upperLimit;
switch (getVersionSize(version))
{
case VersionSize.SMALL:
lowerLimit = 1;
upperLimit = 9;
break;
case VersionSize.MEDIUM:
lowerLimit = 10;
upperLimit = 26;
break;
case VersionSize.LARGE:
default:
lowerLimit = 27;
upperLimit = 40;
break;
}
int size = getSize(version);
// increase version if needed
while (versionNumber < upperLimit && !Encoder.willFit(size, Version.getVersionForNumber(versionNumber), encoder.ecLevel))
{
versionNumber++;
}
// shrink version if possible
while (versionNumber > lowerLimit && Encoder.willFit(size, Version.getVersionForNumber(versionNumber - 1), encoder.ecLevel))
{
versionNumber--;
}
this.version = Version.getVersionForNumber(versionNumber);
}
