138 lines
3.1 KiB
C#
138 lines
3.1 KiB
C#
//
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// Mono.Cairo.Context.cs
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//
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// Author:
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// Miguel de Icaza (miguel@novell.com)
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//
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// This is an OO wrapper API for the Cairo API.
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//
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// Copyright 2007 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Runtime.InteropServices;
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using Cairo;
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namespace Cairo {
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public class Path : IDisposable
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{
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[StructLayout(LayoutKind.Sequential)]
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struct PathStruct
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{
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public Status Status;
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public IntPtr Data;
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public int NumData;
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}
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IntPtr handle = IntPtr.Zero;
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Status status;
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PathData[] data;
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internal Path (IntPtr handle)
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{
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if (handle == IntPtr.Zero)
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throw new ArgumentException ("handle should not be NULL", "handle");
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this.handle = handle;
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if (CairoDebug.Enabled)
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CairoDebug.OnAllocated (handle);
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}
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~Path ()
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{
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Dispose (false);
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}
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public IntPtr Handle { get { return handle; } }
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public void Dispose ()
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{
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Dispose (true);
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GC.SuppressFinalize (this);
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}
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protected virtual void Dispose (bool disposing)
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{
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if (!disposing || CairoDebug.Enabled)
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CairoDebug.OnDisposed<Path> (handle, disposing);
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if (handle == IntPtr.Zero)
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return;
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NativeMethods.cairo_path_destroy (handle);
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handle = IntPtr.Zero;
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}
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void CheckDisposed ()
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{
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if (handle == IntPtr.Zero)
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throw new ObjectDisposedException ("Object has already been disposed");
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}
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void MarshalData ()
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{
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if (data == null)
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{
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var rawStruct = Marshal.PtrToStructure<PathStruct>(handle);
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status = rawStruct.Status;
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data = new PathData[rawStruct.NumData];
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int oneDataSize = Marshal.SizeOf<PathData>();
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for (int i = 0; i < rawStruct.NumData; i++)
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{
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IntPtr iPtr = new IntPtr(rawStruct.Data.ToInt64() + i * oneDataSize);
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data[i] = Marshal.PtrToStructure<PathData>(iPtr);
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}
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}
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}
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public Status Status
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{
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get
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{
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CheckDisposed ();
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MarshalData ();
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return status;
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}
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}
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public int NumData
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{
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get
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{
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CheckDisposed ();
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MarshalData ();
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return data.Length;
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}
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}
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public PathData[] Data
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{
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get
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{
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CheckDisposed ();
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MarshalData ();
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return data;
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}
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}
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}
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}
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