mcs/class/System.Drawing/System.Drawing/Bitmap.cs

   1 //
   2 // System.Drawing.Bitmap.cs
   3 //
   4 // Copyright (C) 2002 Ximian, Inc.  http://www.ximian.com
   5 // Copyright (C) 2004 Novell, Inc.  http://www.novell.com
   6 //
   7 // Authors:
   8 //      Alexandre Pigolkine (pigolkine@gmx.de)
   9 //      Christian Meyer (Christian.Meyer@cs.tum.edu)
  10 //      Miguel de Icaza (miguel@ximian.com)
  11 //      Jordi Mas i Hernandez (jmas@softcatala.org)
  12 //      Ravindra (rkumar@novell.com)
  13 //
  14
  15 //
  16 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  17 //
  18 // Permission is hereby granted, free of charge, to any person obtaining
  19 // a copy of this software and associated documentation files (the
  20 // "Software"), to deal in the Software without restriction, including
  21 // without limitation the rights to use, copy, modify, merge, publish,
  22 // distribute, sublicense, and/or sell copies of the Software, and to
  23 // permit persons to whom the Software is furnished to do so, subject to
  24 // the following conditions:
  25 //
  26 // The above copyright notice and this permission notice shall be
  27 // included in all copies or substantial portions of the Software.
  28 //
  29 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  30 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  31 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  32 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  33 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  34 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  35 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  36 //
  37
  38 using System;
  39 using System.IO;
  40 using System.Drawing.Imaging;
  41 using System.Runtime.Serialization;
  42 using System.Runtime.InteropServices;
  43 using System.ComponentModel;
  44
  45 namespace System.Drawing
  46 {
  47         [Serializable]
  48         [ComVisible (true)]
  49         [Editor ("System.Drawing.Design.BitmapEditor, " + Consts.AssemblySystem_Drawing_Design, typeof (System.Drawing.Design.UITypeEditor))]
  50         public sealed class Bitmap : Image
  51         {
  52                 #region constructors
  53                 // constructors
  54                 internal Bitmap (IntPtr ptr)
  55                 {
  56                         nativeObject = ptr;
  57                 }
  58
  59                 public Bitmap (int width, int height) : this (width, height, PixelFormat.Format32bppArgb)
  60                 {
  61
  62                 }
  63
  64                 public Bitmap (int width, int height, Graphics g)
  65                 {
  66                         IntPtr bmp;
  67                         Status s = GDIPlus.GdipCreateBitmapFromGraphics (width, height, g.nativeObject, out bmp);
  68                         GDIPlus.CheckStatus (s);
  69                         nativeObject = (IntPtr)bmp;
  70                 }
  71
  72                 public Bitmap (int width, int height, PixelFormat format)
  73                 {
  74                         IntPtr bmp;
  75                         Status s = GDIPlus.GdipCreateBitmapFromScan0 (width, height, 0, format, IntPtr.Zero, out bmp);
  76                         GDIPlus.CheckStatus (s);
  77                         nativeObject = (IntPtr) bmp;
  78
  79                 }
  80
  81                 public Bitmap (Image original) : this (original.Width, original.Height, PixelFormat.Format32bppArgb)
  82                 {
  83                         BitmapFromImage(original, original.Size);
  84                 }
  85
  86                 public Bitmap (Stream stream)  : this (stream, false) {}
  87
  88                 public Bitmap (string filename) : this (filename, false) {}
  89
  90                 public Bitmap (Image original, Size newSize)  : this (newSize.Width, newSize.Height, PixelFormat.Format32bppArgb)
  91                 {
  92                         Status          status;
  93                         Graphics        g;
  94
  95                         g=Graphics.FromImage(this);
  96
  97                         status = GDIPlus.GdipDrawImageRectRectI(g.nativeObject, original.nativeObject,
  98                                 0, 0, newSize.Width, newSize.Height,
  99                                 0, 0, original.Width, original.Height,
 100                                 GraphicsUnit.Pixel, IntPtr.Zero, null, IntPtr.Zero);
 101                         GDIPlus.CheckStatus (status);
 102
 103                         g.Dispose();
 104                 }
 105
 106                 internal Bitmap (int width, int height, PixelFormat pixel, IntPtr bmp)
 107                 {
 108                         nativeObject = (IntPtr)bmp;
 109                 }
 110
 111                 internal Bitmap (float width, float height, PixelFormat pixel, IntPtr bmp)
 112                 {
 113                         nativeObject = (IntPtr)bmp;
 114
 115                 }
 116
 117                 internal void BitmapFromImage(Image original, Size newSize){
 118
 119                         if (original is Bitmap) {
 120
 121                                 if (nativeObject!=IntPtr.Zero)
 122                                         Dispose();
 123
 124                                 Bitmap bmpOriginal = (Bitmap) original;
 125
 126                                 IntPtr bmp;
 127                                 Status s = GDIPlus.GdipCloneBitmapAreaI (0, 0, newSize.Width, newSize.Height, bmpOriginal.PixelFormat, bmpOriginal.nativeObject, out bmp);
 128                                 GDIPlus.CheckStatus (s);
 129                                 nativeObject = (IntPtr) bmp;
 130
 131                         }
 132                         else {
 133                                 throw new NotImplementedException ();
 134                         }
 135                 }
 136
 137                 void InitFromFile (string filename)
 138                 {
 139                         IntPtr imagePtr;
 140                         Status st = GDIPlus.GdipLoadImageFromFile (filename, out imagePtr);
 141                         GDIPlus.CheckStatus (st);
 142                         nativeObject = imagePtr;
 143                 }
 144
 145                 public Bitmap (Stream stream, bool useIcm)
 146                 {
 147                         InitFromStream (stream);
 148                 }
 149
 150                 public Bitmap (string filename, bool useIcm)
 151                 {
 152                         InitFromFile (filename);
 153                 }
 154
 155                 public Bitmap (Type type, string resource)
 156                 {
 157                         using (Stream s = type.Assembly.GetManifestResourceStream (resource)){
 158                                 if (s == null)
 159                                         throw new FileNotFoundException ("Resource name was not found: `" + resource + "'");
 160
 161                                 InitFromStream (s);
 162                         }
 163                 }
 164
 165                 public Bitmap (Image original, int width, int heigth)
 166                 {
 167                         Size newSize = new Size();
 168                         newSize.Height=heigth;
 169                         newSize.Width=width;
 170
 171                         BitmapFromImage(original,newSize);
 172                 }
 173
 174                 public Bitmap (int width, int height, int stride, PixelFormat format, IntPtr scan0)
 175                 {
 176                         IntPtr bmp;
 177
 178                         Status status = GDIPlus.GdipCreateBitmapFromScan0 (width, height, stride, format, scan0, out bmp);
 179                         GDIPlus.CheckStatus (status);
 180                         nativeObject = (IntPtr) bmp;
 181                 }
 182
 183                 //The below function is not required. Call should resolve to base
 184                 //Moreover there is a problem with the declaration. Base class function
 185                 //is not declared as protected to access in descendent class
 186                 /*private Bitmap (SerializationInfo info, StreamingContext context) : base(info, context)
 187                 {
 188                 }*/
 189
 190                 #endregion
 191                 // methods
 192                 public Color GetPixel (int x, int y) {
 193
 194                         int argb;
 195
 196                         Status s = GDIPlus.GdipBitmapGetPixel(nativeObject, x, y, out argb);
 197                         GDIPlus.CheckStatus (s);
 198
 199                         return Color.FromArgb(argb);
 200                 }
 201
 202                 public void SetPixel (int x, int y, Color color)
 203                 {
 204                         Status s = GDIPlus.GdipBitmapSetPixel(nativeObject, x, y, color.ToArgb());
 205                         GDIPlus.CheckStatus (s);
 206                 }
 207
 208                 public Bitmap Clone (Rectangle rect,PixelFormat format)
 209                 {
 210                         IntPtr bmp;
 211                         Status status = GDIPlus.GdipCloneBitmapAreaI(rect.X, rect.Top, rect.Width, rect.Height,
 212                                PixelFormat, nativeObject,  out bmp);
 213
 214                         GDIPlus.CheckStatus (status);
 215
 216                         Bitmap bmpnew = new Bitmap (rect.Width, rect.Height,  PixelFormat, (IntPtr) bmp);
 217                         return bmpnew;
 218                 }
 219
 220                 public Bitmap Clone (RectangleF rect, PixelFormat format)
 221                 {
 222                         IntPtr bmp;
 223                         Status status = GDIPlus.GdipCloneBitmapArea (rect.X, rect.Top, rect.Width, rect.Height,
 224                                PixelFormat, nativeObject,  out bmp);
 225                         GDIPlus.CheckStatus (status);
 226
 227                         Bitmap bmpnew = new Bitmap (rect.Width, rect.Height,  PixelFormat, (IntPtr) bmp);
 228                         return bmpnew;
 229                 }
 230
 231                 public static Bitmap FromHicon (IntPtr hicon)   //TODO: Untested
 232                 {
 233                         IntPtr bitmap;
 234
 235                         Status status = GDIPlus.GdipCreateBitmapFromHICON (hicon, out bitmap);
 236                         GDIPlus.CheckStatus (status);
 237
 238                         return new Bitmap (0,0, PixelFormat.Format32bppArgb, bitmap);   // FIXME
 239                 }
 240
 241                 public static Bitmap FromResource (IntPtr hinstance, string bitmapName) //TODO: Untested
 242                 {
 243                         IntPtr bitmap;
 244
 245                         Status status = GDIPlus.GdipCreateBitmapFromResource (hinstance, bitmapName, out bitmap);
 246                         GDIPlus.CheckStatus (status);
 247
 248                         return new Bitmap (0,0, PixelFormat.Format32bppArgb, bitmap); // FIXME
 249                 }
 250
 251                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 252                 public IntPtr GetHbitmap ()
 253                 {
 254                         return GetHbitmap(Color.Gray);
 255                 }
 256
 257                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 258                 public IntPtr GetHbitmap (Color background)
 259                 {
 260                         IntPtr HandleBmp;
 261
 262                         Status status = GDIPlus.GdipCreateHBITMAPFromBitmap (nativeObject, out HandleBmp, background.ToArgb ());
 263                         GDIPlus.CheckStatus (status);
 264
 265                         return  HandleBmp;
 266                 }
 267
 268                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 269                 public IntPtr GetHicon ()
 270                 {
 271                         IntPtr HandleIcon;
 272
 273                         Status status = GDIPlus.GdipCreateHICONFromBitmap (nativeObject, out HandleIcon);
 274                         GDIPlus.CheckStatus (status);
 275
 276                         return  HandleIcon;
 277                 }
 278
 279                 public BitmapData LockBits (Rectangle rect, ImageLockMode flags, PixelFormat format)
 280                 {
 281                         BitmapData result = new BitmapData();
 282
 283                         if (nativeObject == (IntPtr) 0)
 284                                 throw new Exception ("nativeObject is null");
 285
 286                         IntPtr lfBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(result));
 287                         Marshal.StructureToPtr(result, lfBuffer, false);
 288
 289                         Status status = GDIPlus.GdipBitmapLockBits (nativeObject, ref rect, flags, format,  lfBuffer);
 290
 291                         result = (BitmapData) Marshal.PtrToStructure(lfBuffer,  typeof(BitmapData));
 292                         Marshal.FreeHGlobal (lfBuffer);
 293                         //NOTE: scan0 points to piece of memory allocated in the unmanaged space
 294                         GDIPlus.CheckStatus (status);
 295
 296                         return  result;
 297                 }
 298
 299                 public void MakeTransparent ()
 300                 {
 301                         Color clr = GetPixel(0,0);
 302                         MakeTransparent (clr);
 303                 }
 304
 305                 public void MakeTransparent (Color transparentColor)
 306                 {
 307                         // We have to draw always over a 32-bitmap surface that supports alpha channel
 308                         Bitmap  bmp = new Bitmap(Width, Height, PixelFormat.Format32bppArgb);
 309                         Graphics gr = Graphics.FromImage(bmp);
 310                         Rectangle destRect = new Rectangle(0,0, Width, Height);
 311                         ImageAttributes imageAttr = new ImageAttributes();
 312
 313                         imageAttr.SetColorKey(transparentColor, transparentColor);
 314
 315                         gr.DrawImage (this, destRect, 0, 0, Width, Height,      GraphicsUnit.Pixel, imageAttr);
 316
 317                         Size newSize = new Size();
 318                         newSize.Height=Height;
 319                         newSize.Width=Width;
 320                         BitmapFromImage(bmp,newSize);
 321
 322                         gr.Dispose();
 323                         bmp.Dispose();
 324                         imageAttr.Dispose();
 325                 }
 326
 327                 public void SetResolution (float xDpi, float yDpi)
 328                 {
 329                         Status status = GDIPlus.GdipBitmapSetResolution (nativeObject, xDpi, yDpi);
 330                         GDIPlus.CheckStatus (status);
 331                 }
 332
 333                 public void UnlockBits (BitmapData bitmap_data)
 334                 {
 335                         Status status = GDIPlus.GdipBitmapUnlockBits (nativeObject, bitmap_data);
 336                         GDIPlus.CheckStatus (status);
 337                 }
 338         }
 339 }