/// <summary>
/// Returns an instance of System.Drawing.Image which represents visually this CAlphaSprite instance.
/// A lossless conversion takes place.
/// </summary>
/// <returns></returns>
public Image ToImage()
{
Bitmap bmp = new Bitmap(1, 1);
if (this.Height > 0 && this.Width > 0)
{
bmp = new Bitmap(this.Width, this.Height, System.Drawing.Imaging.PixelFormat.Format16bppRgb565);
bmp.MakeTransparent();
int lc = 0;
foreach (Line l in this.Lines)
{
int sc = 0;
int sco = 0;
foreach (Segment s in l.Segments)
{
sco += (int)s.Offset;
for (int i = 0; i < s.PixCount; i++)
{
int x = sco;
int y = lc;
Color color = CAlphaSpriteHelper.GetColorFrom16bit(s.Pixels[i], s.Offset);
try
{
/* Try Catch reason:
* Some segments will overflow the boundaries of the sprite..
* This used to crash the old editor, but a try catch solves it.
* I'll investigate the reason later, but there seems to be absolutely no data loss.*/
bmp.SetPixel(x, y, color);
}
catch { }
sco++;
}
sc++;
}
lc++;
}
}
return(bmp);
}
/// <summary>
/// Initializes a new instance of CAlphaSprite from the given System.Drawing.Image
/// Warning: Lossy conversions take place.
/// DarkEden Alpha Sprites have 2 color channels (5 and 6 bits) and 1 alpha channel (5 bits)
/// whereas System.Drawing.Image is 32-bit in RGBA
/// Colors are approximated.
/// </summary>
/// <param name="srcimg"></param>
public CAlphaSprite(Image srcimg)
{
this.BodyLength = 0;
this.Width = (UInt16)srcimg.Width;
this.Height = (UInt16)srcimg.Height;
this.LineLengths = new UInt16[this.Height];
Bitmap srcbmp = new Bitmap(srcimg);
this.Lines = new Line[srcimg.Height];
for (int y = 0; y < srcimg.Height; y++)
{
this.Lines[y] = new Line();
UInt16 llength = 1;
List <Segment> lsegs = new List <Segment>();
for (int x = 0; x < srcimg.Width;)
{
Segment seg = new Segment();
llength += 2;
List <UInt16> pixels = new List <UInt16>();
byte offs = 0;
while (srcbmp.GetPixel(x, y).A == 0)
{
x++;
if (x >= srcimg.Width)
{
break;
}
else
{
offs += 1;
}
}
seg.Offset = offs;
if (x >= srcimg.Width)
{
llength -= 2;
break;
}
Color c = srcbmp.GetPixel(x, y);
while (c.A > 0)
{
pixels.Add(CAlphaSpriteHelper.Get16bitFromColor(c));
llength += 2;
x++;
if (x >= srcimg.Width)
{
break;
}
c = srcbmp.GetPixel(x, y);
}
seg.PixCount = (byte)pixels.Count;
seg.Pixels = pixels.ToArray();
lsegs.Add(seg);
}
this.LineLengths[y] = llength;
this.BodyLength += llength;
this.Lines[y].SegmentCount = (byte)lsegs.Count;
this.Lines[y].Segments = lsegs.ToArray();
}
this.ByteCount = this.GetBytes().Length;
}