/// Simplified to be single-threaded and blocking
private unsafe static void Bilinear(
Color32[] texColors, int texWidth, int texHeight,
Color32[] newColors, int newWidth, int newHeight)
{
// A single pass of bilinear filtering blends 4 pixels together,
// so don't try to reduce by more than a factor of 2 per iteration
Debug.Assert(newWidth * newHeight == newColors.Length);
fixed(Color32 *pTex = texColors)
{
ColorBuffer cur = new ColorBuffer(texColors, pTex, texWidth, texHeight);
while (true)
{
int tmpWidth = moveTowardsLog(cur.width, newWidth);
int tmpHeight = moveTowardsLog(cur.height, newHeight);
if (newColors.Length == tmpWidth * tmpHeight)
{
fixed(Color32 *pNew = newColors)
{
SinglePassBilinear(cur.array, cur.length, cur.width, cur.height,
pNew, newColors.Length, newWidth, newHeight);
}
return;
}
ColorBuffer tmp = new ColorBuffer(tmpWidth, tmpHeight);
SinglePassBilinear(cur.array, cur.length, cur.width, cur.height,
tmp.array, tmp.length, tmp.width, tmp.height);
cur.Deallocate();
cur = tmp;
}
}
}
