public void Serialize(Stream stream, ColourCollection palette, AdobePhotoshopColourSwatchFileVersion version)
{
this.Serialize(stream, palette, version, AdobePhotoshopColourSwatchColourSpace.RGB);
}
/// <summary>
/// Serializes the specified <see cref="ColourCollection" /> and writes the palette to a file using the specified <see cref="Stream" />.
/// </summary>
/// <param name="stream">The <see cref="Stream" /> used to write the palette.</param>
/// <param name="palette">The <see cref="ColourCollection" /> to serialize.</param>
public override void Serialise(Stream stream, ColourCollection palette)
{
this.Serialize(stream, palette, AdobePhotoshopColourSwatchColourSpace.RGB);
}
public void Serialize(Stream stream, ColourCollection palette, AdobePhotoshopColourSwatchColourSpace colourSpace)
{
this.Serialize(stream, palette, AdobePhotoshopColourSwatchFileVersion.VERSION2, colourSpace);
}
/// <summary>
/// Serializes the specified <see cref="ColourCollection" /> and writes the palette to a file using the specified Stream.
/// </summary>
/// <param name="stream">The <see cref="Stream" /> used to write the palette.</param>
/// <param name="palette">The <see cref="ColourCollection" /> to serialize.</param>
void IPaletteSerialiser.Serialise(Stream stream, ColourCollection palette)
{
this.Serialise(stream, palette);
}
/// <summary> /// Serializes the specified <see cref="ColourCollection" /> and writes the palette to a file using the specified <see cref="Stream"/>. /// </summary> /// <param name="stream">The <see cref="Stream" /> used to write the palette.</param> /// <param name="palette">The <see cref="ColourCollection" /> to serialize.</param> public abstract void Serialise(Stream stream, ColourCollection palette);
protected virtual void WritePalette(Stream stream, ColourCollection palette, AdobePhotoshopColourSwatchFileVersion version, AdobePhotoshopColourSwatchColourSpace colorSpace)
{
int swatchIndex;
this.WriteInt16(stream, (short)version);
this.WriteInt16(stream, (short)palette.Count);
swatchIndex = 0;
foreach (Color colour in palette)
{
short value1;
short value2;
short value3;
short value4;
swatchIndex++;
switch (colorSpace)
{
case AdobePhotoshopColourSwatchColourSpace.RGB:
value1 = (short)(colour.R * 256);
value2 = (short)(colour.G * 256);
value3 = (short)(colour.B * 256);
value4 = 0;
break;
case AdobePhotoshopColourSwatchColourSpace.HSB:
value1 = (short)(colour.GetHue() * 182.04);
value2 = (short)(colour.GetSaturation() * 655.35);
value3 = (short)(colour.GetBrightness() * 655.35);
value4 = 0;
break;
case AdobePhotoshopColourSwatchColourSpace.GRAYSCALE:
if (colour.R == colour.G && colour.R == colour.B)
{
// already grayscale
value1 = (short)(colour.R * 39.0625);
}
else
{
// color is not grayscale, convert
value1 = (short)((colour.R + colour.G + colour.B) / 3.0 * 39.0625);
}
value2 = 0;
value3 = 0;
value4 = 0;
break;
default:
throw new InvalidOperationException("Color space not supported.");
}
this.WriteInt16(stream, (short)colorSpace);
this.WriteInt16(stream, value1);
this.WriteInt16(stream, value2);
this.WriteInt16(stream, value3);
this.WriteInt16(stream, value4);
if (version == AdobePhotoshopColourSwatchFileVersion.VERSION2)
{
string name;
#if USENAMEHACK
name = palette.GetName(swatchIndex - 1);
if (string.IsNullOrEmpty(name))
{
name = string.Format("Swatch {0}", swatchIndex);
}
#else
name = colour.IsNamedColor ? colour.Name : string.Format("Swatch {0}", swatchIndex);
#endif
this.WriteInt32(stream, name.Length);
this.WriteString(stream, name);
}
}
}
protected virtual ColourCollection ReadPalette(Stream stream, AdobePhotoshopColourSwatchFileVersion version)
{
int colourCount;
ColourCollection results;
results = new ColourCollection();
// read the number of colors, which also occupies two bytes
colourCount = this.ReadInt16(stream);
for (int i = 0; i < colourCount; i++)
{
AdobePhotoshopColourSwatchColourSpace colorSpace;
int value1;
int value2;
int value3;
string name;
// again, two bytes for the color space
colorSpace = (AdobePhotoshopColourSwatchColourSpace)this.ReadInt16(stream);
value1 = this.ReadInt16(stream);
value2 = this.ReadInt16(stream);
value3 = this.ReadInt16(stream);
this.ReadInt16(stream); // only CMYK supports this field. As we can't handle CMYK colors, we read the value to advance the stream but don't do anything with it
if (version == AdobePhotoshopColourSwatchFileVersion.VERSION2)
{
int length;
// need to read the name even though currently our colour collection doesn't support names
length = this.ReadInt32(stream);
name = this.ReadString(stream, length);
}
else
{
name = string.Empty;
}
switch (colorSpace)
{
case AdobePhotoshopColourSwatchColourSpace.RGB:
int red;
int green;
int blue;
// RGB.
// The first three values in the color data are red , green , and blue . They are full unsigned
// 16-bit values as in Apple's RGBColor data structure. Pure red = 65535, 0, 0.
red = value1 / 256;
green = value2 / 256;
blue = value3 / 256;
results.Add(Color.FromArgb(red, green, blue));
break;
case AdobePhotoshopColourSwatchColourSpace.HSB:
double hue;
double saturation;
double brightness;
// HSB.
// The first three values in the color data are hue , saturation , and brightness . They are full
// unsigned 16-bit values as in Apple's HSVColor data structure. Pure red = 0,65535, 65535.
hue = value1 / 182.04;
saturation = value2 / 655.35;
brightness = value3 / 655.35;
results.Add(new HSLColour(hue, saturation, brightness).ToRgbColour());
break;
case AdobePhotoshopColourSwatchColourSpace.GRAYSCALE:
int gray;
// Grayscale.
// The first value in the color data is the gray value, from 0...10000.
gray = (int)(value1 / 39.0625);
results.Add(Color.FromArgb(gray, gray, gray));
break;
default:
throw new InvalidDataException(string.Format("Color space '{0}' not supported.", colorSpace));
}
#if USENAMEHACK
results.SetName(i, name);
#endif
}
return(results);
}
/// <summary>
/// Deserializes the <see cref="ColourCollection" /> contained by the specified <see cref="Stream" />.
/// </summary>
/// <param name="stream">The <see cref="Stream" /> that contains the palette to deserialize.</param>
/// <returns>The <see cref="ColourCollection" /> being deserialized.</returns>
public override ColourCollection Deserialise(Stream stream)
{
byte[] buffer;
string header;
ColourCollection results;
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
results = new ColourCollection();
// read the FORM header that identifies the document as an IFF file
buffer = new byte[4];
stream.Read(buffer, 0, buffer.Length);
if (Encoding.ASCII.GetString(buffer) != "FORM")
{
throw new InvalidDataException("Form header not found.");
}
// the next value is the size of all the data in the FORM chunk
// We don't actually need this value, but we have to read it
// regardless to advance the stream
this.ReadInt32(stream);
// read either the PBM or ILBM header that identifies this document as an image file
stream.Read(buffer, 0, buffer.Length);
header = Encoding.ASCII.GetString(buffer);
if (header != "PBM " && header != "ILBM")
{
throw new InvalidDataException("Bitmap header not found.");
}
while (stream.Read(buffer, 0, buffer.Length) == buffer.Length)
{
int chunkLength;
chunkLength = this.ReadInt32(stream);
if (Encoding.ASCII.GetString(buffer) != "CMAP")
{
// some other LBM chunk, skip it
if (stream.CanSeek)
{
stream.Seek(chunkLength, SeekOrigin.Current);
}
else
{
for (int i = 0; i < chunkLength; i++)
{
stream.ReadByte();
}
}
}
else
{
// color map chunk!
for (int i = 0; i < chunkLength / 3; i++)
{
int r;
int g;
int b;
r = stream.ReadByte();
g = stream.ReadByte();
b = stream.ReadByte();
results.Add(Color.FromArgb(r, g, b));
}
// all done so stop reading the rest of the file
break;
}
// chunks always contain an even number of bytes even if the recorded length is odd
// if the length is odd, then there's a padding byte in the file - just read and discard
if (chunkLength % 2 != 0)
{
stream.ReadByte();
}
}
return(results);
}
