public static void Trim(D2dDestructible destructible)
{
alphaData = destructible.AlphaData;
alphaWidth = destructible.AlphaWidth;
alphaHeight = destructible.AlphaHeight;
var xMin = 0;
var xMax = alphaWidth;
var yMin = 0;
var yMax = alphaHeight;
for (var x = xMin; x < xMax; x++)
{
if (FastSolidAlphaVertical(yMin, yMax, x, alphaWidth) == false)
{
xMin += 1;
}
else
{
break;
}
}
for (var x = xMax - 1; x >= xMin; x--)
{
if (FastSolidAlphaVertical(yMin, yMax, x, alphaWidth) == false)
{
xMax -= 1;
}
else
{
break;
}
}
for (var y = yMin; y < yMax; y++)
{
if (FastSolidAlphaHorizontal(xMin, xMax, y, alphaWidth) == false)
{
yMin += 1;
}
else
{
break;
}
}
for (var y = yMax - 1; y >= yMin; y--)
{
if (FastSolidAlphaHorizontal(xMin, xMax, y, alphaWidth) == false)
{
yMax -= 1;
}
else
{
break;
}
}
var width = xMax - xMin + 2;
var height = yMax - yMin + 2;
var rect = D2dRect.CreateFromMinSize(xMin - 1, yMin - 1, width, height);
D2dHelper.ReserveTempAlphaDataClear(width, height);
D2dHelper.PasteAlpha(alphaData, alphaWidth, xMin, xMax, yMin, yMax, 1, 1, width);
destructible.SubsetAlphaWith(D2dHelper.tempAlphaData, rect, destructible.AlphaCountRaw);
}