2 * Copyright (c) 2007-2010 SlimDX Group
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4 * Permission is hereby granted, free of charge, to any person obtaining a copy
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5 * of this software and associated documentation files (the "Software"), to deal
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6 * in the Software without restriction, including without limitation the rights
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7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 * copies of the Software, and to permit persons to whom the Software is
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9 * furnished to do so, subject to the following conditions:
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11 * The above copyright notice and this permission notice shall be included in
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12 * all copies or substantial portions of the Software.
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14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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28 namespace DirectWrite
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30 ref class FontFileStream;
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33 /// Font file loader interface handles loading font file resources of a particular type from a key.
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34 /// The font file loader interface is recommended to be implemented by a singleton object.
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35 /// IMPORTANT: font file loader implementations must not register themselves with DirectWrite factory
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36 /// inside their constructors and must not unregister themselves in their destructors, because
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37 /// registration and underregistration operations increment and decrement the object reference count respectively.
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38 /// Instead, registration and underregistration of font file loaders with DirectWrite factory should be performed
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39 /// outside of the font file loader implementation as a separate step.
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41 public interface struct IFontFileLoader
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44 /// Creates a font file stream object that encapsulates an open file resource.
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45 /// The resource is closed when the last reference to fontFileStream is released.
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47 /// <param name="fontFileReferenceKey">Font file reference key that uniquely identifies the font file resource
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48 /// within the scope of the font loader being used.</param>
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49 /// <param name="fontFileReferenceKeySize">Size of font file reference key in bytes.</param>
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51 /// Reference to the newly created font file stream.
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53 FontFileStream ^CreateStreamFromKey(IntPtr fontFileReferenceKey, int fontFileReferenceKeySize);
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56 class IFontFileLoaderShim : public IDWriteFontFileLoader
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59 static IFontFileLoaderShim *CreateInstance(IFontFileLoader ^loader);
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61 STDMETHOD(QueryInterface)(REFIID riid, void **ppvObject);
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62 STDMETHOD_(ULONG, AddRef)();
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63 STDMETHOD_(ULONG, Release)();
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65 STDMETHOD(CreateStreamFromKey)(void const *fontFileReferenceKey, UINT32 fontFileReferenceKeySize, IDWriteFontFileStream **fontFileStream);
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68 IFontFileLoaderShim(IFontFileLoader ^wrappedInterface);
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71 gcroot<IFontFileLoader ^> m_wrappedInterface;
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