/// <summary>
/// Determines whether the specified <see cref="System.Object"/> is equal to this instance.
/// </summary>
/// <param name="o">The <see cref="System.Object"/> to compare with this instance.</param>
/// <returns>
/// <c>true</c> if the specified <see cref="System.Object"/> is equal to this instance; otherwise, <c>false</c>.
/// </returns>
override public bool Equals(Object o)
{
if (!(o is FinderPattern))
{
return(false);
}
FinderPattern that = (FinderPattern)o;
return(Value == that.Value);
}
private Pair decodePair(BitArray row, bool right, int rowNumber, IDictionary <DecodeHintType, object> hints)
{
int[] startEnd = findFinderPattern(row, 0, right);
if (startEnd == null)
{
return(null);
}
FinderPattern pattern = parseFoundFinderPattern(row, rowNumber, right, startEnd);
if (pattern == null)
{
return(null);
}
ResultPointCallback resultPointCallback = hints == null || !hints.ContainsKey(DecodeHintType.NEED_RESULT_POINT_CALLBACK) ? null :
(ResultPointCallback)hints[DecodeHintType.NEED_RESULT_POINT_CALLBACK];
if (resultPointCallback != null)
{
float center = (startEnd[0] + startEnd[1]) / 2.0f;
if (right)
{
// row is actually reversed
center = row.Size - 1 - center;
}
resultPointCallback(new ResultPoint(center, rowNumber));
}
DataCharacter outside = decodeDataCharacter(row, pattern, true);
if (outside == null)
{
return(null);
}
DataCharacter inside = decodeDataCharacter(row, pattern, false);
if (inside == null)
{
return(null);
}
return(new Pair(1597 * outside.Value + inside.Value,
outside.ChecksumPortion + 4 * inside.ChecksumPortion,
pattern));
}
private DataCharacter decodeDataCharacter(BitArray row, FinderPattern pattern, bool outsideChar)
{
int[] counters = getDataCharacterCounters();
counters[0] = 0;
counters[1] = 0;
counters[2] = 0;
counters[3] = 0;
counters[4] = 0;
counters[5] = 0;
counters[6] = 0;
counters[7] = 0;
if (outsideChar)
{
recordPatternInReverse(row, pattern.StartEnd[0], counters);
}
else
{
recordPattern(row, pattern.StartEnd[1] + 1, counters);
// reverse it
for (int i = 0, j = counters.Length - 1; i < j; i++, j--)
{
int temp = counters[i];
counters[i] = counters[j];
counters[j] = temp;
}
}
int numModules = outsideChar ? 16 : 15;
float elementWidth = (float)count(counters) / (float)numModules;
int[] oddCounts = this.getOddCounts();
int[] evenCounts = this.getEvenCounts();
float[] oddRoundingErrors = this.getOddRoundingErrors();
float[] evenRoundingErrors = this.getEvenRoundingErrors();
for (int i = 0; i < counters.Length; i++)
{
float value = (float)counters[i] / elementWidth;
int rounded = (int)(value + 0.5f); // Round
if (rounded < 1)
{
rounded = 1;
}
else if (rounded > 8)
{
rounded = 8;
}
int offset = i >> 1;
if ((i & 0x01) == 0)
{
oddCounts[offset] = rounded;
oddRoundingErrors[offset] = value - rounded;
}
else
{
evenCounts[offset] = rounded;
evenRoundingErrors[offset] = value - rounded;
}
}
if (!adjustOddEvenCounts(outsideChar, numModules))
{
return(null);
}
int oddSum = 0;
int oddChecksumPortion = 0;
for (int i = oddCounts.Length - 1; i >= 0; i--)
{
oddChecksumPortion *= 9;
oddChecksumPortion += oddCounts[i];
oddSum += oddCounts[i];
}
int evenChecksumPortion = 0;
int evenSum = 0;
for (int i = evenCounts.Length - 1; i >= 0; i--)
{
evenChecksumPortion *= 9;
evenChecksumPortion += evenCounts[i];
evenSum += evenCounts[i];
}
int checksumPortion = oddChecksumPortion + 3 * evenChecksumPortion;
if (outsideChar)
{
if ((oddSum & 0x01) != 0 || oddSum > 12 || oddSum < 4)
{
return(null);
}
int group = (12 - oddSum) / 2;
int oddWidest = OUTSIDE_ODD_WIDEST[group];
int evenWidest = 9 - oddWidest;
int vOdd = RSSUtils.getRSSvalue(oddCounts, oddWidest, false);
int vEven = RSSUtils.getRSSvalue(evenCounts, evenWidest, true);
int tEven = OUTSIDE_EVEN_TOTAL_SUBSET[group];
int gSum = OUTSIDE_GSUM[group];
return(new DataCharacter(vOdd * tEven + vEven + gSum, checksumPortion));
}
else
{
if ((evenSum & 0x01) != 0 || evenSum > 10 || evenSum < 4)
{
return(null);
}
int group = (10 - evenSum) / 2;
int oddWidest = INSIDE_ODD_WIDEST[group];
int evenWidest = 9 - oddWidest;
int vOdd = RSSUtils.getRSSvalue(oddCounts, oddWidest, true);
int vEven = RSSUtils.getRSSvalue(evenCounts, evenWidest, false);
int tOdd = INSIDE_ODD_TOTAL_SUBSET[group];
int gSum = INSIDE_GSUM[group];
return(new DataCharacter(vEven * tOdd + vOdd + gSum, checksumPortion));
}
}