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Surface.cs

//
// Mono.Cairo.Surface.cs
//
// Authors:
//    Duncan Mak
//    Miguel de Icaza.
//
// (C) Ximian Inc, 2003.
// (C) Novell, Inc. 2003.
//
// This is an OO wrapper API for the Cairo API
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// 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.
//

using System;
using System.Collections;


namespace Cairo {

      public class Surface : IDisposable 
        {                                 
            protected static Hashtable surfaces = new Hashtable ();
                internal IntPtr surface = IntPtr.Zero;

            protected Surface()
            {
            }
            
                protected Surface (IntPtr ptr, bool owns)
                {
                        surface = ptr;
                  lock (surfaces.SyncRoot){
                        surfaces [ptr] = this;
                  }
                  if (!owns)
                        CairoAPI.cairo_surface_reference (ptr);
                }

            static internal Surface LookupExternalSurface (IntPtr p)
            {
                  lock (surfaces.SyncRoot){
                        object o = surfaces [p];
                        if (o == null){
#if CAIRO_1_2
                              SurfaceType st = CairoAPI.cairo_surface_get_type (p);

                              switch (st) {
                              case SurfaceType.Image:
                                    return new ImageSurface (p, false);
                              case SurfaceType.Pdf:
                                    return new PdfSurface (p, false);
                              case SurfaceType.XLib:
                                    return new XlibSurface (p, false);
                              case SurfaceType.Xcb:
                                    return new XcbSurface (p, false);
                              }
#else
                              return new Surface (p, false);
#endif                              
                        }
                        return (Surface) o;
                  }
            }           
            
            public Surface GetObject (IntPtr handle)
            {
                  return LookupExternalSurface (handle);
            }

            [Obsolete ("Use an ImageSurface constructor instead.")]
                public static Cairo.Surface CreateForImage (
                        ref byte[] data, Cairo.Format format, int width, int height, int stride)
                {
                        IntPtr p = CairoAPI.cairo_image_surface_create_for_data (
                                data, format, width, height, stride);
                        
                        return new Cairo.Surface (p, true);
                }

            [Obsolete ("Use an ImageSurface constructor instead.")]
                public static Cairo.Surface CreateForImage (
                        Cairo.Format format, int width, int height)
                {
                        IntPtr p = CairoAPI.cairo_image_surface_create (
                                format, width, height);

                        return new Cairo.Surface (p, true);
                }


                public Cairo.Surface CreateSimilar (
                        Cairo.Content content, int width, int height)
                {
                        IntPtr p = CairoAPI.cairo_surface_create_similar (
                                this.Handle, content, width, height);

                        return new Cairo.Surface (p, true);
                }

            ~Surface ()
            {
                  Dispose (false);
            }

            public void Show (Context gr, double x, double y) 
            {
                  CairoAPI.cairo_set_source_surface (gr.Handle, surface, x, y);
                  CairoAPI.cairo_paint (gr.Handle);
            }

            void IDisposable.Dispose ()
            {
                  Dispose (true);
                  GC.SuppressFinalize (this);
            }

            protected virtual void Dispose (bool disposing)
            {
                  if (surface == (IntPtr) 0)
                        return;
                  
                  lock (surfaces.SyncRoot)
                        surfaces.Remove (surface);

                  CairoAPI.cairo_surface_destroy (surface);
                  surface = (IntPtr) 0;
            }
            
            public Status Finish ()
            {
                  CairoAPI.cairo_surface_finish (surface);
                  return Status;
            }
            
            public void Flush ()
            {
                  CairoAPI.cairo_surface_flush (surface);
            }
            
            public void MarkDirty ()
            {
                  CairoAPI.cairo_surface_mark_dirty (Handle);
            }
            
            public void MarkDirty (Rectangle rectangle)
            {
                  CairoAPI.cairo_surface_mark_dirty_rectangle (Handle, (int)rectangle.X, (int)rectangle.Y, (int)rectangle.Width, (int)rectangle.Height);
            }
            
                public IntPtr Handle {
                        get {
                        return surface;
                  }
                }

            public PointD DeviceOffset {
#if CAIRO_1_2
                  get {
                        double x, y;
                        CairoAPI.cairo_surface_get_device_offset (surface, out x, out y);
                        return new PointD (x, y);
                  }
#endif
                  set {
                        CairoAPI.cairo_surface_set_device_offset (surface, value.X, value.Y);
                  }
            }
            
            public void Destroy()
            {
                  Dispose (true);
            }

#if CAIRO_1_2
            public void SetFallbackResolution (double x, double y)
            {
                  CairoAPI.cairo_surface_set_fallback_resolution (surface, x, y);
            }
#endif

            public void WriteToPng (string filename)
            {
                  CairoAPI.cairo_surface_write_to_png (surface, filename);
            }
            
            [Obsolete ("Use Handle instead.")]
                public IntPtr Pointer {
                        get {
                        return surface;
                  }
                }
            
            public Status Status {
                  get { return CairoAPI.cairo_surface_status (surface); }
            }

#if CAIRO_1_2
            public Content Content {
                  get { return CairoAPI.cairo_surface_get_content (surface); }
            }

            public SurfaceType SurfaceType {
                  get { return CairoAPI.cairo_surface_get_type (surface); }
            }
#endif
        }
}

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