95 lines
4.1 KiB
C#
95 lines
4.1 KiB
C#
// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using System.Runtime.InteropServices;
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namespace SharpDX.Win32
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{
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/// <summary>
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/// Internal FontFileEnumerator Callback
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/// </summary>
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internal class ComStreamBaseShadow : SharpDX.ComObjectShadow
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{
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private static readonly ComStreamBaseVtbl Vtbl = new ComStreamBaseVtbl(0);
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internal class ComStreamBaseVtbl : ComObjectVtbl
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{
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//public static IntPtr CallbackToPtr(IStream fontFileEnumerator)
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//{
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// return CallbackToPtr<IStreamBase, ComStreamBaseShadow>(fontFileEnumerator);
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//}
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public ComStreamBaseVtbl(int numberOfMethods)
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: base(numberOfMethods + 2)
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{
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AddMethod(new ReadDelegate(ReadImpl));
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AddMethod(new WriteDelegate(WriteImpl));
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}
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/// <unmanaged>HRESULT ISequentialStream::Read([Out, Buffer] void* pv,[In] unsigned int cb,[Out, Optional] unsigned int* pcbRead)</unmanaged>
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/* public int Read(System.IntPtr vRef, int cb) */
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[UnmanagedFunctionPointer(CallingConvention.StdCall)]
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private delegate int ReadDelegate(IntPtr thisPtr, IntPtr buffer, int sizeOfBytes, out int bytesRead);
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private static int ReadImpl(IntPtr thisPtr, IntPtr buffer, int sizeOfBytes, out int bytesRead)
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{
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bytesRead = 0;
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try
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{
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var shadow = ToShadow<ComStreamBaseShadow>(thisPtr);
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var callback = ((IStream) shadow.Callback);
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bytesRead = callback.Read(buffer, sizeOfBytes);
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}
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catch (Exception exception)
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{
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return (int)SharpDX.Result.GetResultFromException(exception);
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}
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return Result.Ok.Code;
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}
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/// <unmanaged>HRESULT ISequentialStream::Write([In, Buffer] const void* pv,[In] unsigned int cb,[Out, Optional] unsigned int* pcbWritten)</unmanaged>
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/* public int Write(System.IntPtr vRef, int cb) */
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[UnmanagedFunctionPointer(CallingConvention.StdCall)]
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private delegate int WriteDelegate(IntPtr thisPtr, IntPtr buffer, int sizeOfBytes, out int bytesWrite);
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private static int WriteImpl(IntPtr thisPtr, IntPtr buffer, int sizeOfBytes, out int bytesWrite)
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{
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bytesWrite = 0;
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try
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{
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var shadow = ToShadow<ComStreamBaseShadow>(thisPtr);
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var callback = ((IStream)shadow.Callback);
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bytesWrite = callback.Write(buffer, sizeOfBytes);
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}
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catch (Exception exception)
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{
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return (int)SharpDX.Result.GetResultFromException(exception);
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}
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return Result.Ok.Code;
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}
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}
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protected override CppObjectVtbl GetVtbl
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{
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get { return Vtbl; }
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}
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}
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}
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