private void WriteGradientDefs(List <GradientFill> gradients)
{
WriteTag(VexDrawTag.GradientFillList);
WriteBits(0, 5); // note: no nBits here, just padding
WriteBits(gradients.Count, 11);
for (int index = 0; index < gradients.Count; index++)
{
GradientFill gf = gradients[index];
// first type - all non radial will be solid
// use 8 bits for future expansion and to keep semi aligned
int type = (gf.FillType == FillType.Radial) ? 1 : 0;
WriteBits(type, 3);
float[] tltr = DrawObject.GetGradientLine(gf);
int[] values = new int[4];
for (int i = 0; i < tltr.Length; i++)
{
values[i] = (int)(tltr[i] * DrawObject.twips);
}
WriteFourNBitValues(values);
// new argb colors
List <Color> colors = new List <Color>(gf.Fills);
List <float> positions = new List <float>(gf.Stops);
if (gf.FillType == FillType.Radial)
{
gf.ReverseStops(colors, positions);
}
// stops and ratios [[col,rat],[col,rat]...]
int stopCount = colors.Count;
if (stopCount > 8)
{
stopCount = 8;
Console.WriteLine("*Flash only supports 8 colors max in gradients");
}
uint[] wCols = new uint[stopCount];
for (int i = 0; i < stopCount; i++)
{
wCols[i] = colors[i].AFlipRGB;
}
uint colBits = MinBits(wCols);
WriteNBitsCount(colBits);
int[] ratios = new int[positions.Count];
for (int i = 0; i < stopCount; i++)
{
ratios[i] = (int)(positions[i] * 255);
}
uint ratioBits = MinBits(ratios);
WriteNBitsCount(ratioBits);
WriteBits(stopCount, 11);
for (int i = 0; i < stopCount; i++)
{
WriteBits(wCols[i], colBits);
WriteBits(ratios[i], ratioBits);
}
}
FlushTag();
}
