private static void NormalizeFirstStopOffset(IList <GradientColorStop> result)
{
// assert that all stops has no absolute on vector offsets and hints
GradientColorStop firstStop = result[0];
if (firstStop.GetOffsetType() != GradientColorStop.OffsetType.AUTO)
{
return;
}
double firstStopOffset = 0;
foreach (GradientColorStop stopColor in result)
{
if (stopColor.GetOffsetType() == GradientColorStop.OffsetType.RELATIVE)
{
firstStopOffset = stopColor.GetOffset();
break;
}
else
{
if (stopColor.GetHintOffsetType() == GradientColorStop.HintOffsetType.RELATIVE_ON_GRADIENT)
{
firstStopOffset = stopColor.GetHintOffset();
break;
}
}
}
firstStopOffset = Math.Min(0, firstStopOffset);
firstStop.SetOffset(firstStopOffset, GradientColorStop.OffsetType.RELATIVE);
}
private static void NormalizeAutoStops(IList <GradientColorStop> toNormalizeList, int fromIndex, int toIndex
, double prevOffset, double nextOffset)
{
System.Diagnostics.Debug.Assert(toIndex >= fromIndex);
int intervalsCount = Math.Min(toIndex, toNormalizeList.Count - 1) - fromIndex + 1;
double offsetShift = (nextOffset - prevOffset) / intervalsCount;
double currentOffset = prevOffset;
for (int i = fromIndex; i < toIndex; ++i)
{
currentOffset += offsetShift;
GradientColorStop currentAutoStop = toNormalizeList[i];
System.Diagnostics.Debug.Assert(currentAutoStop.GetOffsetType() == GradientColorStop.OffsetType.AUTO);
currentAutoStop.SetOffset(currentOffset, GradientColorStop.OffsetType.RELATIVE);
}
}
