public void ReconstructionTest()
{
var arr = new byte[] { 1, 2, 3, 4 };
var b = new FastBitArray(arr);
var arr2 = b.ToByteArray();
Assert.Equal(arr.Length, arr2.Length);
Assert.Equal(arr[0], arr2[0]);
Assert.Equal(arr[arr.Length - 1], arr2[arr2.Length - 1]);
Assert.Equal(4 * 8, b.Length);
b.Length++;
Assert.Equal((4 * 8) + 1, b.Length);
arr2 = b.ToByteArray();
Assert.Equal(arr[0], arr2[0]);
Assert.Equal(0, arr2[arr2.Length - 1]);
b.SetBit(4 * 8, true);
arr2 = b.ToByteArray();
Assert.Equal(arr[0], arr2[0]);
Assert.Equal(1, arr2[arr2.Length - 1]);
var b2 = new FastBitArray(arr2);
var arr3 = b2.ToByteArray();
Assert.Equal(arr2.Length, arr3.Length);
Assert.Equal(arr2[0], arr3[0]);
Assert.Equal(arr2[arr2.Length - 1], arr3[arr3.Length - 1]);
}
public static unsafe byte[] GetMaskFromImage(Bitmap bmp)
{
int stride = ((bmp.Width + 7) / 8) * 8;
FastBitArray arr = new FastBitArray(stride * bmp.Height);
int strideFactor = 0;
var data = bmp.BasicLockBits();
int bmpStride = data.Stride / 4;
uint *ptrInt = (uint *)data.Scan0;
for (int y = 0; y < bmp.Height; y++)
{
for (int x = 0; x < bmp.Width; x++)
{
if (*(ptrInt + x + (y * bmpStride)) == 0xFFFFFFFFu)
{
arr.SetTrueReverse(x + strideFactor);
}
}
strideFactor += stride;
}
bmp.UnlockBits(data);
return(arr.ToByteArray());
}
public static List <BufferRegion> GetMasksForSprite(ProjectFile pf, AssetSprite spr, out Rect maskbbox, List <Bitmap> bitmaps = null)
{
if (bitmaps == null)
{
bitmaps = GetBitmaps(pf, spr.Width, spr.Height, spr.TextureItems);
}
if (bitmaps.Count == 0)
{
maskbbox = new Rect(0, 0, 0, 0);
return(new List <BufferRegion>());
}
var info = spr.CollisionMask;
if (info.Left == null || info.Top == null || info.Right == null || info.Bottom == null)
{
maskbbox = new Rect(spr.Width - 1, spr.Height - 1, 0, 0);
}
else
{
maskbbox = null;
}
if (spr.CollisionMask.Type == MaskType.PrecisePerFrame)
{
// Get masks for individual frames
List <BufferRegion> res = new List <BufferRegion>(bitmaps.Count);
for (int i = 0; i < bitmaps.Count; i++)
{
res.Add(new BufferRegion(GetMaskForBitmap(bitmaps[i], spr, ref maskbbox).ToByteArray()));
}
if (maskbbox != null)
{
maskbbox.Left = Math.Max(0, maskbbox.Left);
maskbbox.Top = Math.Max(0, maskbbox.Top);
maskbbox.Right = Math.Min(spr.Width - 1, maskbbox.Right);
maskbbox.Bottom = Math.Min(spr.Height - 1, maskbbox.Bottom);
}
return(res);
}
else
{
// Get the mask for the first frame, then add following frames
FastBitArray mask = GetMaskForBitmap(bitmaps[0], spr, ref maskbbox);
for (int i = 1; i < bitmaps.Count; i++)
{
GetMaskForBitmap(bitmaps[i], spr, ref maskbbox, mask);
}
if (maskbbox != null)
{
maskbbox.Left = Math.Max(0, maskbbox.Left);
maskbbox.Top = Math.Max(0, maskbbox.Top);
maskbbox.Right = Math.Min(spr.Width - 1, maskbbox.Right);
maskbbox.Bottom = Math.Min(spr.Height - 1, maskbbox.Bottom);
}
return(new List <BufferRegion> {
new BufferRegion(mask.ToByteArray())
});
}
}
