public virtual void Extract([NotNull] SequentialReader reader, [NotNull] Com.Drew.Metadata.Metadata metadata)
{
reader.SetMotorolaByteOrder(false);
int type;
int imageCount;
// Read header (ICONDIR structure)
try
{
int reserved = reader.GetUInt16();
if (reserved != 0)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Invalid header bytes");
metadata.AddDirectory(directory);
return;
}
type = reader.GetUInt16();
if (type != 1 && type != 2)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Invalid type " + type + " -- expecting 1 or 2");
metadata.AddDirectory(directory);
return;
}
imageCount = reader.GetUInt16();
if (imageCount == 0)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Image count cannot be zero");
metadata.AddDirectory(directory);
return;
}
}
catch (IOException ex)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Exception reading ICO file metadata: " + ex.Message);
metadata.AddDirectory(directory);
return;
}
// Read each embedded image
IcoDirectory directory_1 = null;
try
{
for (int imageIndex = 0; imageIndex < imageCount; imageIndex++)
{
directory_1 = new IcoDirectory();
metadata.AddDirectory(directory_1);
directory_1.SetInt(IcoDirectory.TagImageType, type);
directory_1.SetInt(IcoDirectory.TagImageWidth, reader.GetUInt8());
directory_1.SetInt(IcoDirectory.TagImageHeight, reader.GetUInt8());
directory_1.SetInt(IcoDirectory.TagColourPaletteSize, reader.GetUInt8());
// Ignore this byte (normally zero, though .NET's System.Drawing.Icon.Save method writes 255)
reader.GetUInt8();
if (type == 1)
{
// Icon
directory_1.SetInt(IcoDirectory.TagColourPlanes, reader.GetUInt16());
directory_1.SetInt(IcoDirectory.TagBitsPerPixel, reader.GetUInt16());
}
else
{
// Cursor
directory_1.SetInt(IcoDirectory.TagCursorHotspotX, reader.GetUInt16());
directory_1.SetInt(IcoDirectory.TagCursorHotspotY, reader.GetUInt16());
}
directory_1.SetLong(IcoDirectory.TagImageSizeBytes, reader.GetUInt32());
directory_1.SetLong(IcoDirectory.TagImageOffsetBytes, reader.GetUInt32());
}
}
catch (IOException ex)
{
System.Diagnostics.Debug.Assert((directory_1 != null));
directory_1.AddError("Exception reading ICO file metadata: " + ex.Message);
}
}
public virtual void Extract([NotNull] SequentialReader reader, [NotNull] Com.Drew.Metadata.Metadata metadata)
{
reader.SetMotorolaByteOrder(false);
int type;
int imageCount;
// Read header (ICONDIR structure)
try
{
int reserved = reader.GetUInt16();
if (reserved != 0)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Invalid header bytes");
metadata.AddDirectory(directory);
return;
}
type = reader.GetUInt16();
if (type != 1 && type != 2)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Invalid type " + type + " -- expecting 1 or 2");
metadata.AddDirectory(directory);
return;
}
imageCount = reader.GetUInt16();
if (imageCount == 0)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Image count cannot be zero");
metadata.AddDirectory(directory);
return;
}
}
catch (IOException ex)
{
IcoDirectory directory = new IcoDirectory();
directory.AddError("Exception reading ICO file metadata: " + ex.Message);
metadata.AddDirectory(directory);
return;
}
// Read each embedded image
IcoDirectory directory_1 = null;
try
{
for (int imageIndex = 0; imageIndex < imageCount; imageIndex++)
{
directory_1 = new IcoDirectory();
metadata.AddDirectory(directory_1);
directory_1.SetInt(IcoDirectory.TagImageType, type);
directory_1.SetInt(IcoDirectory.TagImageWidth, reader.GetUInt8());
directory_1.SetInt(IcoDirectory.TagImageHeight, reader.GetUInt8());
directory_1.SetInt(IcoDirectory.TagColourPaletteSize, reader.GetUInt8());
// Ignore this byte (normally zero, though .NET's System.Drawing.Icon.Save method writes 255)
reader.GetUInt8();
if (type == 1)
{
// Icon
directory_1.SetInt(IcoDirectory.TagColourPlanes, reader.GetUInt16());
directory_1.SetInt(IcoDirectory.TagBitsPerPixel, reader.GetUInt16());
}
else
{
// Cursor
directory_1.SetInt(IcoDirectory.TagCursorHotspotX, reader.GetUInt16());
directory_1.SetInt(IcoDirectory.TagCursorHotspotY, reader.GetUInt16());
}
directory_1.SetLong(IcoDirectory.TagImageSizeBytes, reader.GetUInt32());
directory_1.SetLong(IcoDirectory.TagImageOffsetBytes, reader.GetUInt32());
}
}
catch (IOException ex)
{
System.Diagnostics.Debug.Assert((directory_1 != null));
directory_1.AddError("Exception reading ICO file metadata: " + ex.Message);
}
}