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.Drawing;
  37 using System.Runtime.InteropServices;
  38 using System.Collections;
  39 using Cairo;
  40
  41 namespace Cairo {
  42
  43         public class SurfaceImage : Surface
  44         {
  45
  46                 public SurfaceImage (string filename)
  47                 {
  48                         surface = CairoAPI.cairo_image_surface_create_from_png (filename);
  49                         lock (surfaces.SyncRoot){
  50                                 surfaces [surface] = this;
  51                         }
  52
  53                         CairoAPI.cairo_surface_reference (surface);
  54                 }
  55
  56                 public int Width {
  57                         get { return CairoAPI.cairo_image_surface_get_width (surface); }
  58                 }
  59
  60                 public int Height {
  61                         get { return CairoAPI.cairo_image_surface_get_height (surface); }
  62                 }
  63
  64         }
  65
  66         public class Surface : IDisposable
  67         {
  68                 protected static Hashtable surfaces = new Hashtable ();
  69                 internal IntPtr surface = IntPtr.Zero;
  70
  71                 protected Surface()
  72                 {}
  73
  74                 private Surface (IntPtr ptr, bool owns)
  75                 {
  76                         surface = ptr;
  77                         lock (surfaces.SyncRoot){
  78                                 surfaces [ptr] = this;
  79                         }
  80                         if (!owns)
  81                                 CairoAPI.cairo_surface_reference (ptr);
  82                 }
  83
  84                 static internal Surface LookupExternalSurface (IntPtr p)
  85                 {
  86                         lock (surfaces.SyncRoot){
  87                                 object o = surfaces [p];
  88                                 if (o == null){
  89                                         return new Surface (p, false);
  90                                 }
  91                                 return (Surface) o;
  92                         }
  93                 }
  94
  95                 public static Cairo.Surface CreateForXlib (IntPtr display, IntPtr win,
  96                                                            IntPtr visual, int w,
  97                                                            int h)
  98                 {
  99                         IntPtr p = CairoAPI.cairo_xlib_surface_create (display, win,
 100                                                                    visual, w, h);
 101                         if(p == IntPtr.Zero) System.Console.WriteLine("Failed creating surface");
 102                         return new Cairo.Surface (p, false);
 103                 }
 104
 105                 public static Cairo.Surface CreateForImage (
 106                         string data, Cairo.Format format, int width, int height, int stride)
 107                 {
 108                         IntPtr p = CairoAPI.cairo_image_surface_create_for_data (
 109                                 data, format, width, height, stride);
 110
 111                         return new Cairo.Surface (p, true);
 112                 }
 113
 114                 public static Cairo.Surface CreateForImage (
 115                         Cairo.Format format, int width, int height)
 116                 {
 117                         IntPtr p = CairoAPI.cairo_image_surface_create (
 118                                 format, width, height);
 119
 120                         return new Cairo.Surface (p, true);
 121                 }
 122
 123
 124                 public static Cairo.Surface CreateSimilar (
 125                         Cairo.Surface surface, Cairo.Format format, int width, int height)
 126                 {
 127                         IntPtr p = CairoAPI.cairo_surface_create_similar (
 128                                 surface.Handle, format, width, height);
 129
 130                         return new Cairo.Surface (p, true);
 131                 }
 132
 133                 public static Cairo.Surface CreateSimilarSolid (
 134                         Cairo.Surface surface, Cairo.Format format,
 135                         int width, int height, double red, double green, double blue, double alpha)
 136                 {
 137                         IntPtr p = CairoAPI.cairo_surface_create_similar_solid (
 138                                 surface.Handle, format, width, height, red, green, blue, alpha);
 139
 140                         return new Cairo.Surface (p, true);
 141                 }
 142
 143                 ~Surface ()
 144                 {
 145                         Dispose (false);
 146                 }
 147
 148                 public void Show (Graphics gr, int width, int height)
 149                 {
 150                         CairoAPI.cairo_set_source_surface (gr.Handle, surface, width, height);
 151                         CairoAPI.cairo_paint (gr.Handle);
 152                 }
 153
 154                 void IDisposable.Dispose ()
 155                 {
 156                         Dispose (true);
 157                         GC.SuppressFinalize (this);
 158                 }
 159
 160                 protected virtual void Dispose (bool disposing)
 161                 {
 162                         if (surface == (IntPtr) 0)
 163                                 return;
 164                         lock (surfaces.SyncRoot){
 165                                 surfaces.Remove (surface);
 166                         }
 167                         CairoAPI.cairo_surface_destroy (surface);
 168                         surface = (IntPtr) 0;
 169                 }
 170
 171                 public Cairo.Status Finish ()
 172                 {
 173                         return CairoAPI.cairo_surface_finish (surface);
 174                 }
 175
 176                 public IntPtr Handle {
 177                         get { return surface; }
 178                 }
 179
 180                 public PointD DeviceOffset {
 181                         set { CairoAPI.cairo_surface_set_device_offset (surface,
 182                                                                     value.X,
 183                                                                     value.Y);
 184                         }
 185                 }
 186
 187                 public void XlibSetSize (int w, int h)
 188                 {
 189                         CairoAPI.cairo_xlib_surface_set_size (surface, w, h);
 190                 }
 191
 192                 public void Destroy()
 193                 {
 194                         CairoAPI.cairo_surface_destroy (surface);
 195                 }
 196
 197                 public IntPtr Pointer {
 198                         get { return surface; }
 199                 }
 200
 201         }
 202 }