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 Surface : IDisposable
  44         {
  45                 static Hashtable surfaces = new Hashtable ();
  46                 internal IntPtr surface = IntPtr.Zero;
  47
  48                 private Surface (IntPtr ptr, bool owns)
  49                 {
  50                         surface = ptr;
  51                         lock (typeof (Surface)){
  52                                 surfaces [ptr] = this;
  53                         }
  54                         if (!owns)
  55                                 CairoAPI.cairo_surface_reference (ptr);
  56                 }
  57
  58                 static internal Surface LookupExternalSurface (IntPtr p)
  59                 {
  60                         lock (typeof (Surface)){
  61                                 object o = surfaces [p];
  62                                 if (o == null){
  63                                         return new Surface (p, false);
  64                                 }
  65                                 return (Surface) o;
  66                         }
  67                 }
  68
  69                 public static Cairo.Surface CreateForImage (
  70                         string data, Cairo.Format format, int width, int height, int stride)
  71                 {
  72                         IntPtr p = CairoAPI.cairo_surface_create_for_image (
  73                                 data, format, width, height, stride);
  74
  75                         return new Cairo.Surface (p, true);
  76                 }
  77
  78                 public static Cairo.Surface CreateForImage (
  79                         Cairo.Format format, int width, int height)
  80                 {
  81                         IntPtr p = CairoAPI.cairo_image_surface_create (
  82                                 format, width, height);
  83
  84                         return new Cairo.Surface (p, true);
  85                 }
  86
  87
  88                 public static Cairo.Surface CreateSimilar (
  89                         Cairo.Surface surface, Cairo.Format format, int width, int height)
  90                 {
  91                         IntPtr p = CairoAPI.cairo_surface_create_similar (
  92                                 surface.Handle, format, width, height);
  93
  94                         return new Cairo.Surface (p, true);
  95                 }
  96
  97                 public static Cairo.Surface CreateSimilarSolid (
  98                         Cairo.Surface surface, Cairo.Format format,
  99                         int width, int height, double red, double green, double blue, double alpha)
 100                 {
 101                         IntPtr p = CairoAPI.cairo_surface_create_similar_solid (
 102                                 surface.Handle, format, width, height, red, green, blue, alpha);
 103
 104                         return new Cairo.Surface (p, true);
 105                 }
 106
 107                 ~Surface ()
 108                 {
 109                         Dispose (false);
 110                 }
 111
 112                 public void Show (Graphics gr, int width, int height)
 113                 {
 114                         CairoAPI.cairo_show_surface (gr.Handle, surface, width,  height);
 115                 }
 116
 117                 void IDisposable.Dispose ()
 118                 {
 119                         Dispose (true);
 120                         GC.SuppressFinalize (this);
 121                 }
 122
 123                 protected virtual void Dispose (bool disposing)
 124                 {
 125                         if (surface == (IntPtr) 0)
 126                                 return;
 127                         lock (typeof (Surface)){
 128                                 surfaces.Remove (surface);
 129                         }
 130                         CairoAPI.cairo_surface_destroy (surface);
 131                         surface = (IntPtr) 0;
 132                 }
 133
 134                 public IntPtr Handle {
 135                         get { return surface; }
 136                 }
 137
 138                 public int Repeat {
 139                         set {
 140                                 CairoAPI.cairo_surface_set_repeat (surface, value);
 141                         }
 142                 }
 143
 144                 public Cairo.Matrix Matrix {
 145                         set {
 146                                 CairoAPI.cairo_surface_set_matrix (surface, value.Pointer);
 147                         }
 148
 149                         get {
 150                                 IntPtr p = IntPtr.Zero;
 151                                 CairoAPI.cairo_surface_get_matrix (surface, out p);
 152                                 return new Cairo.Matrix (p);
 153                         }
 154                 }
 155
 156                 public Cairo.Filter Filter {
 157                         set {
 158                                 CairoAPI.cairo_surface_set_filter (surface, value);
 159                         }
 160                 }
 161
 162                 public IntPtr Pointer {
 163                         get { return surface; }
 164                 }
 165
 166
 167
 168         }
 169 }