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// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2004 Novell, Inc.
//
// Authors:
// Peter Bartok pbartok@novell.com
//
// NOT COMPLETE
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Reflection;
namespace System.Windows.Forms {
[Editor("System.Drawing.Design.CursorEditor, " + Consts.AssemblySystem_Drawing_Design, typeof(System.Drawing.Design.UITypeEditor))]
[Serializable]
[TypeConverter(typeof(CursorConverter))]
public sealed class Cursor : IDisposable, ISerializable {
#region Internal Structs
[StructLayout(LayoutKind.Sequential)]
private struct CursorDir {
internal ushort idReserved; // Reserved
internal ushort idType; // resource type (2 for cursors)
internal ushort idCount; // how many cursors
internal CursorEntry[] idEntries; // the entries for each cursor
};
[StructLayout(LayoutKind.Sequential)]
private struct CursorEntry {
internal byte width; // Width of cursor
internal byte height; // Height of cursor
internal byte colorCount; // colors in cursor
internal byte reserved; // Reserved
internal ushort xHotspot; // Hotspot X
internal ushort yHotspot; // Hotspot Y
internal ushort bitCount; // Bits per pixel
internal uint sizeInBytes; // size of (CursorInfoHeader + ANDBitmap + ORBitmap)
internal uint fileOffset; // position in file
};
[StructLayout(LayoutKind.Sequential)]
private struct CursorInfoHeader {
internal uint biSize;
internal int biWidth;
internal int biHeight;
internal ushort biPlanes;
internal ushort biBitCount;
internal uint biCompression;
internal uint biSizeImage;
internal int biXPelsPerMeter;
internal int biYPelsPerMeter;
internal uint biClrUsed;
internal uint biClrImportant;
};
[StructLayout(LayoutKind.Sequential)]
private struct CursorImage {
internal CursorInfoHeader cursorHeader; // image header
internal uint[] cursorColors; // colors table
internal byte[] cursorXOR; // bits for XOR mask
internal byte[] cursorAND; // bits for AND mask
};
#endregion // Internal structs
#region Local Variables
private static Cursor current;
private CursorDir cursor_dir;
private CursorImage[] cursor_data;
private int id;
internal IntPtr handle;
private Size size;
private Bitmap shape;
private Bitmap mask;
private Bitmap cursor;
internal string name;
#if NET_2_0
private object tag;
#endif
#endregion // Local Variables
#region Public Constructors
private void CreateCursor(System.IO.Stream stream) {
InitFromStream(stream);
this.shape = ToBitmap(true, false);
this.mask = ToBitmap(false, false);
handle = XplatUI.DefineCursor(shape, mask, Color.FromArgb(255, 255, 255), Color.FromArgb(255, 255, 255), cursor_dir.idEntries[id].xHotspot, cursor_dir.idEntries[id].yHotspot);
this.shape.Dispose();
this.shape = null;
this.mask.Dispose();
this.mask = null;
if (handle != IntPtr.Zero) {
this.cursor = ToBitmap(true, true);
}
}
private Cursor(SerializationInfo info, StreamingContext context) {
}
private Cursor() {
}
~Cursor() {
Dispose();
}
// This is supposed to take a Win32 handle
public Cursor(IntPtr handle) {
this.handle = handle;
}
public Cursor(System.IO.Stream stream) {
CreateCursor(stream);
}
public Cursor(string fileName) : this (new FileStream (fileName, FileMode.Open)) {
}
public Cursor(Type type, string resource) {
using (Stream s = type.Assembly.GetManifestResourceStream (type, resource)) {
if (s != null) {
CreateCursor(s);
return;
}
}
// Try a different way, previous failed
using (Stream s = Assembly.GetExecutingAssembly().GetManifestResourceStream(resource)) {
if (s != null) {
CreateCursor(s);
return;
}
}
throw new FileNotFoundException ("Resource name was not found: `" + resource + "'");
}
#endregion // Public Constructors
#region Public Static Properties
public static Rectangle Clip {
get {
IntPtr handle;
bool confined;
Rectangle rect;
Size size;
XplatUI.GrabInfo(out handle, out confined, out rect);
if (handle != IntPtr.Zero) {
return rect;
}
XplatUI.GetDisplaySize(out size);
rect.X = 0;
rect.Y = 0;
rect.Width = size.Width;
rect.Height = size.Height;
return rect;
}
[MonoTODO("First need to add ability to set cursor clip rectangle to XplatUI drivers to implement this property")]
set {
;
}
}
[MonoTODO("Implement setting a null cursor, and add XplatUI method to get current cursor")]
public static Cursor Current {
get {
if (current != null) {
return current;
}
return Cursors.Default;
}
set {
if (current != value) {
current = value;
if (current == null || current == Cursors.Default){
// FIXME - define and set empty cursor
XplatUI.OverrideCursor(IntPtr.Zero);
} else
XplatUI.OverrideCursor(current.handle);
}
}
}
public static Point Position {
get {
int x;
int y;
XplatUI.GetCursorPos (IntPtr.Zero, out x, out y);
return new Point (x, y);
}
set {
XplatUI.SetCursorPos(IntPtr.Zero, value.X, value.Y);
}
}
#endregion // Public Static Properties
#region Public Instance Properties
public IntPtr Handle {
get {
return handle;
}
}
public Size Size {
get {
return size;
}
}
#if NET_2_0
[Localizable (false)]
[Bindable (true)]
[TypeConverter (typeof (StringConverter))]
[DefaultValue (null)]
[MWFCategory ("Data")]
public object Tag {
get { return this.tag; }
set { this.tag = value; }
}
#endif
#endregion // Public Instance Properties
#region Public Static Methods
public static void Hide() {
XplatUI.ShowCursor(false);
}
public static void Show() {
XplatUI.ShowCursor(false);
}
public static bool operator !=(Cursor left, Cursor right) {
if ((object)left == (object)right) {
return false;
}
if ((object)left == null || (object)right == null) {
return true;
}
if (left.handle == right.handle) {
return false;
}
return true;
}
public static bool operator ==(Cursor left, Cursor right) {
if ((object)left == (object)right) {
return true;
}
if ((object)left == null || (object)right == null) {
return false;
}
if (left.handle == right.handle) {
return true;
}
return false;
}
#endregion // Public Static Methods
#region Public Instance Methods
public IntPtr CopyHandle() {
return handle;
}
public void Dispose() {
if (this.cursor != null) {
this.cursor.Dispose();
this.cursor = null;
}
if (this.shape != null) {
this.shape.Dispose();
this.shape = null;
}
if (this.mask != null) {
this.mask.Dispose();
this.mask = null;
}
GC.SuppressFinalize (this);
}
public void Draw(Graphics g, Rectangle targetRect) {
if (this.cursor != null) {
g.DrawImage(this.cursor, targetRect);
}
}
public void DrawStretched(Graphics g, Rectangle targetRect) {
if (this.cursor != null) {
g.DrawImage(this.cursor, targetRect, new Rectangle(0, 0, this.cursor.Width, this.cursor.Height), GraphicsUnit.Pixel);
}
}
public override bool Equals(object obj) {
if ( !(obj is Cursor)) {
return false;
}
if (((Cursor)obj).handle == this.handle) {
return true;
}
return false;
}
public override int GetHashCode() {
return base.GetHashCode ();
}
public override string ToString() {
if (name != null) {
return "[Cursor:" + name + "]";
}
throw new FormatException("Cannot convert custom cursors to string.");
}
void ISerializable.GetObjectData(SerializationInfo si, StreamingContext context) {
MemoryStream ms;
BinaryWriter wr;
CursorImage ci;
ms = new MemoryStream();
wr = new BinaryWriter(ms);
ci = cursor_data[this.id];
// Build the headers, first the CursorDir
wr.Write((ushort)0); // Reserved
wr.Write((ushort)2); // Resource type
wr.Write((ushort)1); // Count
// Next the CursorEntry
wr.Write((byte)cursor_dir.idEntries[this.id].width);
wr.Write((byte)cursor_dir.idEntries[this.id].height);
wr.Write((byte)cursor_dir.idEntries[this.id].colorCount);
wr.Write((byte)cursor_dir.idEntries[this.id].reserved);
wr.Write((ushort)cursor_dir.idEntries[this.id].xHotspot);
wr.Write((ushort)cursor_dir.idEntries[this.id].yHotspot);
wr.Write((uint)(40 + (ci.cursorColors.Length * 4) + ci.cursorXOR.Length + ci.cursorAND.Length));
wr.Write((uint)(6 + 16)); // CursorDir + CursorEntry size
// Then the CursorInfoHeader
wr.Write(ci.cursorHeader.biSize);
wr.Write(ci.cursorHeader.biWidth);
wr.Write(ci.cursorHeader.biHeight);
wr.Write(ci.cursorHeader.biPlanes);
wr.Write(ci.cursorHeader.biBitCount);
wr.Write(ci.cursorHeader.biCompression);
wr.Write(ci.cursorHeader.biSizeImage);
wr.Write(ci.cursorHeader.biXPelsPerMeter);
wr.Write(ci.cursorHeader.biYPelsPerMeter);
wr.Write(ci.cursorHeader.biClrUsed);
wr.Write(ci.cursorHeader.biClrImportant);
for (int i = 0; i < ci.cursorColors.Length; i++) {
wr.Write(ci.cursorColors[i]);
}
wr.Write(ci.cursorXOR);
wr.Write(ci.cursorAND);
wr.Flush();
si.AddValue ("CursorData", ms.ToArray());
}
#endregion // Public Instance Methods
#region Private Methods w
private void InitFromStream(Stream stream) {
ushort entry_count;
CursorEntry ce;
uint largest;
//read the cursor header
if (stream == null || stream.Length == 0) {
throw new System.ArgumentException ("The argument 'stream' must be a picture that can be used as a cursor", "stream");
}
BinaryReader reader = new BinaryReader (stream);
cursor_dir = new CursorDir ();
cursor_dir.idReserved = reader.ReadUInt16();
cursor_dir.idType = reader.ReadUInt16();
if (cursor_dir.idReserved != 0 || !(cursor_dir.idType == 2 || cursor_dir.idType == 1))
throw new System.ArgumentException ("Invalid Argument, format error", "stream");
entry_count = reader.ReadUInt16();
cursor_dir.idCount = entry_count;
cursor_dir.idEntries = new CursorEntry[entry_count];
cursor_data = new CursorImage[entry_count];
//now read in the CursorEntry structures
for (int i=0; i < entry_count; i++){
ce = new CursorEntry();
ce.width = reader.ReadByte();
ce.height = reader.ReadByte();
ce.colorCount = reader.ReadByte();
ce.reserved = reader.ReadByte();
ce.xHotspot = reader.ReadUInt16();
ce.yHotspot = reader.ReadUInt16();
if (cursor_dir.idType == 1) {
ce.xHotspot = (ushort)(ce.width / 2);
ce.yHotspot = (ushort)(ce.height / 2);
}
ce.sizeInBytes = reader.ReadUInt32();
ce.fileOffset = reader.ReadUInt32();
cursor_dir.idEntries[i] = ce;
}
// If we have more than one pick the largest cursor
largest = 0;
for (int j=0; j < entry_count; j++){
if (cursor_dir.idEntries[j].sizeInBytes >= largest) {
largest = cursor_dir.idEntries[j].sizeInBytes;
this.id = (ushort)j;
this.size.Height = cursor_dir.idEntries[j].height;
this.size.Width = cursor_dir.idEntries[j].width;
}
}
//now read in the cursor data
for (int j = 0; j < entry_count; j++) {
CursorImage curdata;
CursorInfoHeader cih;
byte[] buffer;
BinaryReader cih_reader;
int num_colors;
int cursor_height;
int bytes_per_line;
int xor_size;
int and_size;
curdata = new CursorImage();
cih = new CursorInfoHeader();
stream.Seek (cursor_dir.idEntries[j].fileOffset, SeekOrigin.Begin);
buffer = new byte [cursor_dir.idEntries[j].sizeInBytes];
stream.Read (buffer, 0, buffer.Length);
cih_reader = new BinaryReader(new MemoryStream(buffer));
cih.biSize = cih_reader.ReadUInt32 ();
if (cih.biSize != 40) {
throw new System.ArgumentException ("Invalid cursor file", "stream");
}
cih.biWidth = cih_reader.ReadInt32 ();
cih.biHeight = cih_reader.ReadInt32 ();
cih.biPlanes = cih_reader.ReadUInt16 ();
cih.biBitCount = cih_reader.ReadUInt16 ();
cih.biCompression = cih_reader.ReadUInt32 ();
cih.biSizeImage = cih_reader.ReadUInt32 ();
cih.biXPelsPerMeter = cih_reader.ReadInt32 ();
cih.biYPelsPerMeter = cih_reader.ReadInt32 ();
cih.biClrUsed = cih_reader.ReadUInt32 ();
cih.biClrImportant = cih_reader.ReadUInt32 ();
curdata.cursorHeader = cih;
//Read the number of colors used and corresponding memory occupied by
//color table. Fill this memory chunk into rgbquad[]
switch (cih.biBitCount){
case 1: num_colors = 2; break;
case 4: num_colors = 16; break;
case 8: num_colors = 256; break;
default: num_colors = 0; break;
}
curdata.cursorColors = new uint[num_colors];
for (int i = 0; i < num_colors; i++) {
curdata.cursorColors[i] = cih_reader.ReadUInt32 ();
}
//XOR mask is immediately after ColorTable and its size is
//icon height* no. of bytes per line
//cursor height is half of BITMAPINFOHEADER.biHeight, since it contains
//both XOR as well as AND mask bytes
cursor_height = cih.biHeight/2;
//bytes per line should should be uint aligned
bytes_per_line = ((((cih.biWidth * cih.biPlanes * cih.biBitCount)+ 31)>>5)<<2);
//Determine the XOR array Size
xor_size = bytes_per_line * cursor_height;
curdata.cursorXOR = new byte[xor_size];
for (int i = 0; i < xor_size; i++) {
curdata.cursorXOR[i] = cih_reader.ReadByte();
}
//Determine the AND array size
and_size = (int)(cih_reader.BaseStream.Length - cih_reader.BaseStream.Position);
curdata.cursorAND = new byte[and_size];
for (int i = 0; i < and_size; i++) {
curdata.cursorAND[i] = cih_reader.ReadByte();
}
cursor_data[j] = curdata;
cih_reader.Close();
}
reader.Close();
}
private Bitmap ToBitmap(bool xor, bool transparent) {
CursorImage ci;
CursorInfoHeader cih;
int ncolors;
Bitmap bmp;
BitmapData bits;
ColorPalette pal;
int biHeight;
int bytesPerLine;
if (cursor_data == null) {
return new Bitmap(32, 32);
}
ci = cursor_data[this.id];
cih = ci.cursorHeader;
biHeight = cih.biHeight / 2;
if (!xor) {
// The AND mask is 1bit - very straightforward
bmp = new Bitmap(cih.biWidth, biHeight, PixelFormat.Format1bppIndexed);
pal = bmp.Palette;
pal.Entries[0] = Color.FromArgb(0, 0, 0);
pal.Entries[1] = Color.FromArgb(unchecked((int)0xffffffffff));
bits = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, bmp.PixelFormat);
for (int y = 0; y < biHeight; y++) {
Marshal.Copy(ci.cursorAND, bits.Stride * y, (IntPtr)(bits.Scan0.ToInt64() + bits.Stride * (biHeight - 1 - y)), bits.Stride);
}
bmp.UnlockBits(bits);
} else {
ncolors = (int)cih.biClrUsed;
if (ncolors == 0) {
if (cih.biBitCount < 24) {
ncolors = (int)(1 << cih.biBitCount);
}
}
switch(cih.biBitCount) {
case 1: { // Monochrome
bmp = new Bitmap(cih.biWidth, biHeight, PixelFormat.Format1bppIndexed);
break;
}
case 4: { // 4bpp
bmp = new Bitmap(cih.biWidth, biHeight, PixelFormat.Format4bppIndexed);
break;
}
case 8: { // 8bpp
bmp = new Bitmap(cih.biWidth, biHeight, PixelFormat.Format8bppIndexed);
break;
}
case 24:
case 32: { // 32bpp
bmp = new Bitmap(cih.biWidth, biHeight, PixelFormat.Format32bppArgb);
break;
}
default: {
throw new Exception("Unexpected number of bits:" + cih.biBitCount.ToString());
}
}
if (cih.biBitCount < 24) {
pal = bmp.Palette; // Managed palette
for (int i = 0; i < ci.cursorColors.Length; i++) {
pal.Entries[i] = Color.FromArgb((int)ci.cursorColors[i] | unchecked((int)0xff000000));
}
bmp.Palette = pal;
}
bytesPerLine = (int)((((cih.biWidth * cih.biBitCount) + 31) & ~31) >> 3);
bits = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, bmp.PixelFormat);
for (int y = 0; y < biHeight; y++) {
Marshal.Copy(ci.cursorXOR, bytesPerLine * y, (IntPtr)(bits.Scan0.ToInt64() + bits.Stride * (biHeight - 1 - y)), bytesPerLine);
}
bmp.UnlockBits(bits);
}
if (transparent) {
bmp = new Bitmap(bmp); // This makes a 32bpp image out of an indexed one
// Apply the mask to make properly transparent
for (int y = 0; y < biHeight; y++) {
for (int x = 0; x < cih.biWidth / 8; x++) {
for (int bit = 7; bit >= 0; bit--) {
if (((ci.cursorAND[y * cih.biWidth / 8 +x] >> bit) & 1) != 0) {
bmp.SetPixel(x*8 + 7-bit, biHeight - y - 1, Color.Transparent);
}
}
}
}
}
return bmp;
}
#endregion // Private Methods
}
}
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