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Surface.cs

//
// Mono.Cairo.CairoSurfaceObject.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 ImageSurface : Surface
        {
            public ImageSurface (Format format, int width, int height)
            {
                  surface = CairoAPI.cairo_image_surface_create (format, width, height);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }

            public ImageSurface (string data, Cairo.Format format, int width, int height, int stride)
            {
                  surface = CairoAPI.cairo_image_surface_create_for_data (data, format, width, height, stride);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }
            
            public ImageSurface (string filename)
            {
                  surface = CairoAPI.cairo_image_surface_create_from_png (filename);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }
            
            public int Width {
                  get { return CairoAPI.cairo_image_surface_get_width (surface); }
            }
            
            public int Height {
                  get { return CairoAPI.cairo_image_surface_get_height (surface); }
            }
            
      }

      #if UNSTABLE
      public class PdfSurface : Surface
      {
            public PdfSurface (string filename, double width, double height)
            {
                  surface = CairoAPI.cairo_pdf_surface_create (filename, width, height);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }

            public void SetDPI (double x_dpi, double y_dpi)
            {
                  CairoAPI.cairo_pdf_surface_set_dpi (surface, x_dpi, y_dpi);
            }
      }

      public class PostscriptSurface : Surface
      {
            public PostscriptSurface (string filename, double width, double height)
            {
                  surface = CairoAPI.cairo_ps_surface_create (filename, width, height);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }

            public void SetDPI (double x_dpi, double y_dpi)
            {
                  CairoAPI.cairo_ps_surface_set_dpi (surface, x_dpi, y_dpi);
            }
      }
      #endif

      public class Win32Surface : Surface
      {
            public Win32Surface (IntPtr hdc)
            {
                  surface = CairoAPI.cairo_win32_surface_create (hdc);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }
      }

      public class XlibSurface : Surface
      {
            public XlibSurface (IntPtr display, IntPtr drawable, IntPtr visual, int width, int height)
            {
                  surface = CairoAPI.cairo_xlib_surface_create (display, drawable, visual, width, height);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }

            /* FIXME: has the same parameters as above
            public XlibSurface (IntPtr display, IntPtr bitmap, IntPtr screen, int width, int height)
            {
                  surface = CairoAPI.cairo_xlib_surface_create_for_bitmap (display, bitmap, screen, width, height);
                  lock (surfaces.SyncRoot){
                        surfaces [surface] = this;
                  }
            }
            */

            public void SetDrawable (IntPtr drawable, int width, int height)
            {
                  CairoAPI.cairo_xlib_surface_set_drawable (surface, drawable, width, height);
            }

            public void SetSize (int width, int height)
            {
                  CairoAPI.cairo_xlib_surface_set_size (surface, width, height);
            }
      }
   
      public class Surface : IDisposable 
        {                                 
            protected static Hashtable surfaces = new Hashtable ();
                internal IntPtr surface = IntPtr.Zero;

            protected Surface()
            {
            }
            
                private 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){
                              return new Surface (p, false);
                        }
                        return (Surface) o;
                  }
            }           
            
            [Obsolete ("Use an ImageSurface constructor instead.")]
                public static Cairo.Surface CreateForImage (
                        string 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 (Graphics gr, int width, int height) 
            {
                  CairoAPI.cairo_set_source_surface (gr.Handle, surface, width, height);
                  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 Cairo.Status Finish ()
            {
                  return CairoAPI.cairo_surface_finish (surface);
            }
            
                public IntPtr Handle {
                        get {
                        return surface;
                  }
                }

            public PointD DeviceOffset {
                  set {
                        CairoAPI.cairo_surface_set_device_offset (surface, value.X, value.Y);
                  }
            }
            
            public void Destroy()
            {
                  CairoAPI.cairo_surface_destroy (surface);
            }

            public void WriteToPng (string filename)
            {
                  CairoAPI.cairo_surface_write_to_png (surface, filename);
            }
            
                public IntPtr Pointer {
                        get {
                        return surface;
                  }
                }
            
            public Status Status {
                  get { return CairoAPI.cairo_surface_status (surface); }
            }

        }
}

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