//the header contains all the basic information for the psd, such as its size
private void parseHeader()
{
Console.Out.WriteLine("parsing header");
signiture = bytes.getString(4);
if (signiture != "8BPS")
{
throw new Exception("Incorrect PSD signiture: " + signiture);
}
traceProperty("signiture", signiture);
//read the version
version = bytes.getUI16();
if (version != 1)
{
if (version == 2)
{
throw new Exception("PSB is not supported.");
}
else
{
throw new Exception("Unknown version: " + version);
}
}
traceProperty("version", version);
//there are 6 reserved bytes that dont do anything
bytes.skipBytes(6);
//the number of color channels
numberOfChannels = bytes.getUI16();
traceProperty("number of channels", numberOfChannels);
//the width and height of the canvas in pixels
height = bytes.getUI32();
width = bytes.getUI32();
traceProperty("width", width);
traceProperty("height", height);
//the number of bits per channel
bitDepth = bytes.getUI16();
traceProperty("bit depth", bitDepth);
//the color mode, there is an enum for this called colorModeEnum
colorMode = bytes.getUI16();
if (ColorModeEnum.getName(colorMode) == null)
{
throw new Exception("Unknown color mode: " + colorMode);
}
traceProperty("color mode", ColorModeEnum.getName(colorMode));
}
//parses the color mode data, e.g. whether it is rgb or cymk,
//i can not parse indexed or duotone colors
private void parseColorModeData()
{
Console.Out.WriteLine("parsing color mode data");
uint length = bytes.getUI32();
switch (colorMode)
{
case ColorModeEnum.INDEXED:
throw new Exception("Indexed color mode not supported");
case ColorModeEnum.DUOTONE:
throw new Exception("Duotone color mode not supported");
default:
if (length != 0)
{
throw new Exception("Color mode data found for: " + ColorModeEnum.getName(colorMode));
}
break;
}
}