mcs/class/Mono.Cairo/Mono.Cairo/Surface.cs

   1 //
   2 // Mono.Cairo.CairoSurfaceObject.cs
   3 //
   4 // Authors:
   5 //    Duncan Mak
   6 //    Miguel de Icaza.
   7 //
   8 // (C) Ximian Inc, 2003.
   9 // (C) Novell, Inc. 2003.
  10 //
  11 // This is an OO wrapper API for the Cairo API
  12 //
  13 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Collections;
  37
  38 namespace Cairo {
  39
  40         public class SurfaceImage : Surface
  41         {
  42
  43                 public SurfaceImage (string filename)
  44                 {
  45                         surface = CairoAPI.cairo_image_surface_create_from_png (filename);
  46                         lock (surfaces.SyncRoot){
  47                                 surfaces [surface] = this;
  48                         }
  49
  50                         CairoAPI.cairo_surface_reference (surface);
  51                 }
  52
  53                 public int Width {
  54                         get { return CairoAPI.cairo_image_surface_get_width (surface); }
  55                 }
  56
  57                 public int Height {
  58                         get { return CairoAPI.cairo_image_surface_get_height (surface); }
  59                 }
  60
  61         }
  62
  63         public class Surface : IDisposable
  64         {
  65                 protected static Hashtable surfaces = new Hashtable ();
  66                 internal IntPtr surface = IntPtr.Zero;
  67
  68                 protected Surface()
  69                 {}
  70
  71                 private Surface (IntPtr ptr, bool owns)
  72                 {
  73                         surface = ptr;
  74                         lock (surfaces.SyncRoot){
  75                                 surfaces [ptr] = this;
  76                         }
  77                         if (!owns)
  78                                 CairoAPI.cairo_surface_reference (ptr);
  79                 }
  80
  81                 static internal Surface LookupExternalSurface (IntPtr p)
  82                 {
  83                         lock (surfaces.SyncRoot){
  84                                 object o = surfaces [p];
  85                                 if (o == null){
  86                                         return new Surface (p, false);
  87                                 }
  88                                 return (Surface) o;
  89                         }
  90                 }
  91
  92                 public static Cairo.Surface CreateForXlib (IntPtr display, IntPtr win,
  93                                                            IntPtr visual, int w,
  94                                                            int h)
  95                 {
  96                         IntPtr p = CairoAPI.cairo_xlib_surface_create (display, win,
  97                                                                    visual, w, h);
  98                         if(p == IntPtr.Zero) System.Console.WriteLine("Failed creating surface");
  99                         return new Cairo.Surface (p, false);
 100                 }
 101
 102                 public static Cairo.Surface CreateForImage (
 103                         string data, Cairo.Format format, int width, int height, int stride)
 104                 {
 105                         IntPtr p = CairoAPI.cairo_image_surface_create_for_data (
 106                                 data, format, width, height, stride);
 107
 108                         return new Cairo.Surface (p, true);
 109                 }
 110
 111                 public static Cairo.Surface CreateForImage (
 112                         Cairo.Format format, int width, int height)
 113                 {
 114                         IntPtr p = CairoAPI.cairo_image_surface_create (
 115                                 format, width, height);
 116
 117                         return new Cairo.Surface (p, true);
 118                 }
 119
 120
 121                 public static Cairo.Surface CreateSimilar (
 122                         Cairo.Surface surface, Cairo.Format format, int width, int height)
 123                 {
 124                         IntPtr p = CairoAPI.cairo_surface_create_similar (
 125                                 surface.Handle, format, width, height);
 126
 127                         return new Cairo.Surface (p, true);
 128                 }
 129
 130                 public static Cairo.Surface CreateSimilarSolid (
 131                         Cairo.Surface surface, Cairo.Format format,
 132                         int width, int height, double red, double green, double blue, double alpha)
 133                 {
 134                         IntPtr p = CairoAPI.cairo_surface_create_similar_solid (
 135                                 surface.Handle, format, width, height, red, green, blue, alpha);
 136
 137                         return new Cairo.Surface (p, true);
 138                 }
 139
 140                 ~Surface ()
 141                 {
 142                         Dispose (false);
 143                 }
 144
 145                 public void Show (Graphics gr, int width, int height)
 146                 {
 147                         CairoAPI.cairo_set_source_surface (gr.Handle, surface, width, height);
 148                         CairoAPI.cairo_paint (gr.Handle);
 149                 }
 150
 151                 void IDisposable.Dispose ()
 152                 {
 153                         Dispose (true);
 154                         GC.SuppressFinalize (this);
 155                 }
 156
 157                 protected virtual void Dispose (bool disposing)
 158                 {
 159                         if (surface == (IntPtr) 0)
 160                                 return;
 161                         lock (surfaces.SyncRoot){
 162                                 surfaces.Remove (surface);
 163                         }
 164                         CairoAPI.cairo_surface_destroy (surface);
 165                         surface = (IntPtr) 0;
 166                 }
 167
 168                 public Cairo.Status Finish ()
 169                 {
 170                         return CairoAPI.cairo_surface_finish (surface);
 171                 }
 172
 173                 public IntPtr Handle {
 174                         get { return surface; }
 175                 }
 176
 177                 public PointD DeviceOffset {
 178                         set { CairoAPI.cairo_surface_set_device_offset (surface,
 179                                                                     value.X,
 180                                                                     value.Y);
 181                         }
 182                 }
 183
 184                 public void XlibSetSize (int w, int h)
 185                 {
 186                         CairoAPI.cairo_xlib_surface_set_size (surface, w, h);
 187                 }
 188
 189                 public void Destroy()
 190                 {
 191                         CairoAPI.cairo_surface_destroy (surface);
 192                 }
 193
 194                 public void WriteToPng (string filename)
 195                 {
 196                         CairoAPI.cairo_surface_write_to_png (surface, filename);
 197                 }
 198
 199                 public IntPtr Pointer {
 200                         get { return surface; }
 201                 }
 202
 203         }
 204 }