private MemoryStream GetBitmapResource(ResourceValue name)
{
// Bitmap resources are saved either as DIB or DDB bitmaps and
// therefore it is quite ok to use Win-API function LoadBitmap().
// See also http://support.microsoft.com/kb/67883/de.
// TODO: Use GetBinaryResource() instead of LoadBitmap().
// Because the bitmap returned by function LoadBitmap() seems
// to be loaded with wrong colors.
// REMARK: Using LoadImage() instead produces almost the same result!
// And therefore it makes no sense to use this function.
MemoryStream result = new MemoryStream();
IntPtr hBitmap = ResourcesLocator.LoadBitmap(this.hModule, name.Value);
if (hBitmap != IntPtr.Zero)
{
Bitmap bitmap = Image.FromHbitmap(hBitmap);
if (bitmap != null)
{
bitmap.Save(result, ImageFormat.Bmp);
}
ResourcesLocator.DeleteObject(hBitmap);
result.Position = 0;
}
return(result);
}
private byte[] GetBinaryResource(ResourceType type, ResourceValue name)
{
// Writing a general function to handle resource loading based on
// functions FindResource(), LoadResource() etc. is not really
// easy because of the returned handle HGLOBAL is a pointer to
// resource depending structures that contain additional resource
// type depending information and not the resource information
// directly! For example see loading an icon resource under
// http://www.codeproject.com/Tips/62005/Extracting-A-Particular-Icon-From-an-ICO-Resource.aspx
// But the code below should work for custom resources like PNG,
// XML etc.
byte[] result = new byte[0];
IntPtr hInfo = ResourcesLocator.FindResource(this.hModule, name.Value, type.Value);
if (hInfo != IntPtr.Zero)
{
int size = ResourcesLocator.SizeofResource(this.hModule, hInfo);
IntPtr hResource = ResourcesLocator.LoadResource(this.hModule, hInfo);
if (hResource != IntPtr.Zero)
{
result = new byte[size];
IntPtr hLock = ResourcesLocator.LockResource(hResource);
if (hLock != IntPtr.Zero)
{
Marshal.Copy(hLock, result, 0, size);
}
}
}
return(result);
}
public ResourceValue[] GetValues(ResourceType type)
{
ResourceValue[] result = new ResourceValue[0];
if (this.cache.ContainsKey(type))
{
result = this.cache[type].ToArray();
}
return(result);
}
private MemoryStream GetStringResource(ResourceValue name)
{
MemoryStream result = new MemoryStream();
ResourceType type = new ResourceType(ResourceTypes.RT_STRING);
byte[] buffer = this.GetBinaryResource(type, name);
if (buffer.Length > 0)
{
BinaryWriter writer = new BinaryWriter(result);
char[] helper = Encoding.Unicode.GetString(buffer).ToCharArray();
int offset = 0;
for (int index = 0; index < 16; index++)
{
if (helper[offset] != 0)
{
int length = helper[offset]; // GetWord() // String length in characters
offset++;
if (length > 0)
{
int stringID = (name.Value.ToInt32() - 1) * 16 + index;
writer.Write(stringID);
writer.Write(length);
for (int inner = offset; inner < offset + length; inner++)
{
writer.Write(helper[inner]);
}
}
offset += length;
}
else
{
offset++;
}
}
result.Position = 0;
}
return(result);
}
private MemoryStream GetIconResource(ResourceValue name)
{
// This function is based on code written by Tsuda Kageyu.
// Many thanks to him! For more information see code sample
// under http://www.codeproject.com/KB/cs/IconExtractor.aspx.
const int NEWHEADER = 6; // sizeof(NEWHEADER)
const int ICONRESDIR = 16; // sizeof(ICONRESDIR)
const int GROUPRESDIR = 14; // sizeof(GROUPRESDIR)
ResourceType group = new ResourceType(ResourceTypes.RT_GROUP_ICON);
ResourceType entry = new ResourceType(ResourceTypes.RT_ICON);
MemoryStream result = new MemoryStream();
byte[] groupBuffer = this.GetBinaryResource(group, name);
if (groupBuffer.Length > 0)
{
BinaryWriter writer = new BinaryWriter(result);
int count = BitConverter.ToUInt16(groupBuffer, 4);
int offset = NEWHEADER + ICONRESDIR * count;
writer.Write(groupBuffer, 0, NEWHEADER);
for (int index = 0; index < count; index++)
{
writer.BaseStream.Seek(NEWHEADER + ICONRESDIR * index, SeekOrigin.Begin);
writer.Write(groupBuffer, NEWHEADER + GROUPRESDIR * index, ICONRESDIR - 4);
writer.Write(offset);
IntPtr iconID = (IntPtr)BitConverter.ToUInt16(groupBuffer, NEWHEADER + GROUPRESDIR * index + 12);
byte[] imageBuffer = this.GetBinaryResource(entry, new ResourceValue(iconID));
writer.BaseStream.Seek(offset, SeekOrigin.Begin);
writer.Write(imageBuffer, 0, imageBuffer.Length);
offset += imageBuffer.Length;
}
result.Position = 0;
}
return(result);
}
public MemoryStream GetResource(ResourceType type, ResourceValue name)
{
MemoryStream result = null;
if (this.hModule != IntPtr.Zero)
{
if (type.Type == ResourceTypes.RT_BITMAP)
{
result = this.GetBitmapResource(name);
}
else if (type.Type == ResourceTypes.RT_GROUP_ICON || type.Type == ResourceTypes.RT_ICON)
{
// Resource icons consisting of an icon group on this calling level!
result = this.GetIconResource(name);
}
else if (type.Type == ResourceTypes.RT_GROUP_CURSOR || type.Type == ResourceTypes.RT_CURSOR)
{
// Resource icons consisting of an icon group on this calling level!
result = this.GetCursorResource(name);
}
else if (type.Type == ResourceTypes.RT_STRING)
{
result = this.GetStringResource(name);
}
else if (type.Type == ResourceTypes.RT_VERSION)
{
// Simply return as binary data.
result = new MemoryStream(this.GetBinaryResource(type, name));
}
else
{
result = new MemoryStream(this.GetBinaryResource(type, name));
}
}
return(result);
}
private MemoryStream GetCursorResource(ResourceValue name)
{
// Implementing this function made a lot pain in the ass!
// This is because of that class Cursor does not eat streams
// with data comming from a resource! This class only likes
// such streams in the cursour file format (file type *.cur).
// Not a problem?!? Indeed, it is a problem, because resource
// format for cursors differs from cursor file format! Further
// but not complete information about cursors can be found
// under http://msdn.microsoft.com/en-us/library/ms646975.aspx
// Conclusion: It was a very long way!
const int NEWHEADER = 6; // sizeof(NEWHEADER)
const int CURSORDIR = 16; // sizeof(CURSORDIR)
const int LOCALHEADER = 4; // sizeof(LOCALHEADER)
ResourceType group = new ResourceType(ResourceTypes.RT_GROUP_CURSOR);
ResourceType entry = new ResourceType(ResourceTypes.RT_CURSOR);
MemoryStream result = new MemoryStream();
MemoryStream images = new MemoryStream(); // Temporary buffer to hold image data.
byte[] groupBuffer = this.GetBinaryResource(group, name);
if (groupBuffer.Length > 0)
{
BinaryWriter groupWriter = new BinaryWriter(result);
BinaryReader groupReader = new BinaryReader(new MemoryStream(groupBuffer));
// Read NEWHEADER data.
ushort idReserved = groupReader.ReadUInt16();
ushort idType = groupReader.ReadUInt16();
ushort idCount = groupReader.ReadUInt16();
// Data offset within cursor file.
ushort offset = (ushort)(NEWHEADER + CURSORDIR * idCount);
// Write NEWHEADER data.
groupWriter.Write(idReserved); // Must be 0.
groupWriter.Write(idType); // Must be 2 for cursors!
groupWriter.Write(idCount); // Number of cursor "images".
for (int index = 0; index < idCount; index++)
{
// Read CURSORDIR data.
ushort wWidth = groupReader.ReadUInt16();
ushort wHeight = groupReader.ReadUInt16();
ushort wPlanes = groupReader.ReadUInt16();
ushort wBitCount = groupReader.ReadUInt16();
uint dwBytesInRes = groupReader.ReadUInt32();
ushort wImageOffset = groupReader.ReadUInt16();
byte[] imageBuffer = this.GetBinaryResource(entry, new ResourceValue(new IntPtr(wImageOffset)));
if (imageBuffer.Length > 0)
{
BinaryReader imageReader = new BinaryReader(new MemoryStream(imageBuffer));
// Read LOCALHEADER data.
ushort wXHotSpot = imageReader.ReadUInt16();
ushort wYHotSpot = imageReader.ReadUInt16();
// Adapt resource data to fit cursor file data needs!
byte bWidth = (byte)wWidth;
byte bHeight = (byte)(wHeight / 2); // Recalc if odd!
byte bColorCount = 0;
byte bReserved = 0;
ushort wPadding = 0;
// Planes and BitCount are used as HotSpot information instead!
wPlanes = wXHotSpot;
wBitCount = wYHotSpot;
// HotSpot information have to be removed from image buffer!
dwBytesInRes = dwBytesInRes - LOCALHEADER; // 4 bytes of HotSpot!
// Write new CURSORDIR data.
groupWriter.Write(bWidth);
groupWriter.Write(bHeight);
groupWriter.Write(bColorCount);
groupWriter.Write(bReserved);
groupWriter.Write(wPlanes);
groupWriter.Write(wBitCount);
groupWriter.Write(dwBytesInRes);
groupWriter.Write(offset);
groupWriter.Write(wPadding);
// Recalculate next offset.
offset += (ushort)(dwBytesInRes);
// Append current image data at the temporary buffer.
images.Write(imageBuffer, LOCALHEADER, (int)dwBytesInRes);
}
}
// Now append all image data at once at the result buffer.
groupWriter.Write(images.ToArray(), 0, (int)images.Length);
// Return to the result stream's start position.
result.Position = 0;
}
return(result);
}
