public void Read( Stream ins, String PackName )
{
if (ins.ReadByte() != (byte)'R' ) return;
if (ins.ReadByte() != (byte)'B' ) return;
if (ins.ReadByte() != (byte)'S' ) return;
if (ins.ReadByte() != (byte)'P' ) return;
int nSprites = ReadWord( ins );
ReadDword( ins );
ReadDword( ins );
int firstSprite = Sprites.Count;
// read header
for (int i = 0; i < nSprites; i++)
{
Sprite sp = new Sprite();
sp.Width = ReadWord( ins );
sp.Height = ReadWord( ins );
sp.ClrFormat = (ColorFormat)ReadWord( ins );
sp.Frame.x = ReadWord( ins );
sp.Frame.y = ReadWord( ins );
sp.Frame.w = ReadWord( ins );
sp.Frame.h = ReadWord( ins );
sp.Name = PackName + i;
int bFiltered = ReadWord( ins );
if (bFiltered == 1) sp.Filtered = true; else sp.Filtered = false;
int nRects = ReadWord( ins );
sp.PivotX = (short)ReadWord( ins );
sp.PivotY = (short)ReadWord( ins );
sp.ShiftX = (short)ReadWord( ins );
sp.ShiftY = (short)ReadWord( ins );
for (int j = 0; j < nRects; j++)
{
Frame rc = new Frame();
rc.x = ReadWord( ins );
rc.y = ReadWord( ins );
rc.w = ReadWord( ins );
rc.h = rc.w;
ReadWord( ins );
sp.Partition.Rects.Add( rc );
}
Sprites.Add( sp );
}
// read pixels
for (int i = firstSprite; i < Sprites.Count; i++)
{
Sprite sprite = (Sprite)Sprites[i];
int nBytes = sprite.GetNumBytes();
sprite.Bytes = new byte[nBytes];
ins.Read( sprite.Bytes, 0, nBytes );
}
}
public void Subtract( ref Sprite sp )
{
if (sp.Width != Width ||
sp.Height != Height)
{
return;
}
Bitmap sbmp = sp.GetBitmap( false );
Bitmap dbmp = GetBitmap( false );
int nPixels = Width*Height;
int nSame = 0;
int nNonTransp = 0;
unchecked
{
for (int i = 0; i < nPixels; i++)
{
int x = i%Width;
int y = i/Width;
Color dclr = dbmp.GetPixel( x, y );
Color sclr = sbmp.GetPixel( x, y );
if (sclr.A != 0)
{
nNonTransp++;
}
Color clr = dclr;
if (sclr == dclr)
{
clr = Color.FromArgb( 0, 0, 0, 0 );
nSame++;
}
sbmp.SetPixel( x, y, clr );
}
}
const int c_SubtractBias = 30;
if (nSame > nNonTransp*c_SubtractBias/100)
{
Difference = true;
CreatePartition( sbmp );
}
}