// read spf from file
public static SPFFile FromFile(string pathToFile)
{
FileStream fs = new FileStream(pathToFile, FileMode.Open);
SPFFile spfFile = FromStream(fs);
return(spfFile);
}
// read spf from stream
public static SPFFile FromStream(Stream stream)
{
SPFFile spfFile = new SPFFile();
byte[] buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
stream.Close();
BinaryReader br = new BinaryReader(new MemoryStream(buffer));
spfFile.signature = br.ReadChars(2);
spfFile.width = br.ReadInt32();
spfFile.height = br.ReadInt32();
spfFile.stripCount = br.ReadInt32();
spfFile.strips = new SPFStrip[spfFile.stripCount];
for (int i = 0; i < spfFile.stripCount; i++)
{
int length;
byte r, g, b, a;
length = br.ReadInt32();
if (length < 0)
{
List <Color> rawColors = new List <Color>();
for (int j = 0; j < Math.Abs(length); j++)
{
r = br.ReadByte();
g = br.ReadByte();
b = br.ReadByte();
a = br.ReadByte();
rawColors.Add(Color.FromArgb(a, r, g, b));
}
spfFile.strips[i] = new SPFStrip(length, rawColors.ToArray());
}
else
{
r = br.ReadByte();
g = br.ReadByte();
b = br.ReadByte();
a = br.ReadByte();
spfFile.strips[i] = new SPFStrip(length, new Color[] { Color.FromArgb(a, r, g, b) });
}
}
br.Close();
return(spfFile);
}
private void convertToSpfButton_Click(object sender, EventArgs e)
{
settings.spf = SPFFile.FromBitmap(settings.bit);
ChangeLayout();
imageViewer.Invalidate();
stripCountLabel.Text = "Strip count: " + settings.spf.stripCount.ToString();
}
//
private void LoadSPF()
{
settings.spf = SPFFile.FromFile(pathToFile);
if (settings.spf == null)
{
MessageBox.Show(@"This file doesn't exists ¯\_(ツ)_/¯");
return;
}
else
{
settings.bit = settings.spf.GetImage();
ChangeLayout();
imageViewer.Invalidate();
stripCountLabel.Text = "Strip count: " + settings.spf.stripCount.ToString();
}
}
// convert bitmap to spf
public static SPFFile FromBitmap(Bitmap bit)
{
SPFFile spfFile = new SPFFile();
Color color;
Color nextColor = Color.White;
List <Color> rawColors = new List <Color>();
List <SPFStrip> strips = new List <SPFStrip>();
int offset = 0; // pixel offset
int xx = 0, yy = 0; // pixel 2D coordinate
int length = 1; // strip length
int imagePixelNumber = bit.Width * bit.Height; // number of pixels
//
spfFile.signature = new char[] { 'S', 'P' };
spfFile.width = bit.Width; // width
spfFile.height = bit.Height; // height
int stripCount = 0;
// algorithm for finding pixels with same color for forming strips
while (offset < imagePixelNumber)
{
color = bit.GetPixel(xx, yy);
// next color
offset++;
OffsetToCoordinates(ref xx, ref yy, offset, bit.Width);
// while offset less that imagePixelNumber and previous pixel color equals to current pixel color
while ((offset < imagePixelNumber) && (color == (nextColor = bit.GetPixel(xx, yy))))
{
offset++;
length++;
OffsetToCoordinates(ref xx, ref yy, offset, bit.Width);
}
if (length == 1)
{
rawColors.Add(color);
length = -1;
// next color
Color col = Color.White;
while ((offset < imagePixelNumber) && (color != (col = bit.GetPixel(xx, yy))))
{
rawColors.Add(col);
color = col;
length--;
offset++;
OffsetToCoordinates(ref xx, ref yy, offset, bit.Width);
}
strips.Add(new SPFStrip(length, rawColors.ToArray()));
rawColors.Clear();
}
else
{
strips.Add(new SPFStrip(length, new Color[] { color }));
}
stripCount++;
length = 1; // length to default
}
spfFile.stripCount = stripCount;
spfFile.strips = strips.ToArray();
spfFile.original = bit;
return(spfFile);
}
