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Gfx: Implement DWrite interfaces required for loading fonts
This commit is contained in:
Birunthan Mohanathas
67
Common/Gfx/Util/DWriteFontCollectionLoader.cpp
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67
Common/Gfx/Util/DWriteFontCollectionLoader.cpp
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "DWriteFontCollectionLoader.h"
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#include "DWriteFontFileEnumerator.h"
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#include <vector>
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namespace Gfx {
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namespace Util {
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DWriteFontCollectionLoader* DWriteFontCollectionLoader::GetInstance()
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{
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static DWriteFontCollectionLoader s_Instance;
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return &s_Instance;
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}
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ULONG STDMETHODCALLTYPE DWriteFontCollectionLoader::AddRef()
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{
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// This is a singleton class so return a dummy value.
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return 1;
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}
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ULONG STDMETHODCALLTYPE DWriteFontCollectionLoader::Release()
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{
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// This is a singleton class so return a dummy value.
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return 1;
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}
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HRESULT STDMETHODCALLTYPE DWriteFontCollectionLoader::QueryInterface(IID const& riid, void** ppvObject)
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{
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if (riid == IID_IUnknown ||
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riid == __uuidof(IDWriteFontCollectionLoader))
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{
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*ppvObject = this;
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return S_OK;
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}
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*ppvObject = NULL;
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return E_NOINTERFACE;
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}
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HRESULT STDMETHODCALLTYPE DWriteFontCollectionLoader::CreateEnumeratorFromKey(
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IDWriteFactory* factory, void const* collectionKey, UINT32 collectionKeySize,
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IDWriteFontFileEnumerator** fontFileEnumerator)
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{
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*fontFileEnumerator = new DWriteFontFileEnumerator(
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*(const std::vector<IDWriteFontFile*>*)collectionKey);
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return S_OK;
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}
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} // namespace Util
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} // namespace Gfx
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53
Common/Gfx/Util/DWriteFontCollectionLoader.h
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53
Common/Gfx/Util/DWriteFontCollectionLoader.h
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@ -0,0 +1,53 @@
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef RM_GFX_UTIL_DWRITEFONTCOLLECTIONLOADER_H_
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#define RM_GFX_UTIL_DWRITEFONTCOLLECTIONLOADER_H_
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#include <dwrite.h>
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namespace Gfx {
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namespace Util {
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// Implements the IDWriteFontCollectionLoader interface as a singleton object. When
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// CreateEnumeratorFromKey is called, a new DWriteFontFileEnumerator object is created using
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// |fontCollectionKey| (which is assumed to be a pointer to std::vector<IDWriteFontFile*>).
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class DWriteFontCollectionLoader : public IDWriteFontCollectionLoader
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{
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public:
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static DWriteFontCollectionLoader* GetInstance();
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// IUnknown
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID uuid, void** object) override;
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virtual ULONG STDMETHODCALLTYPE AddRef() override;
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virtual ULONG STDMETHODCALLTYPE Release() override;
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// IFontCollectionLoader
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virtual HRESULT STDMETHODCALLTYPE CreateEnumeratorFromKey(
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IDWriteFactory* factory, void const* fontCollectionKey, UINT32 fontCollectionKeySize,
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IDWriteFontFileEnumerator** fontFileEnumerator) override;
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private:
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DWriteFontCollectionLoader() {}
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DWriteFontCollectionLoader(const DWriteFontCollectionLoader& other) {}
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};
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} // namespace Util
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} // namespace Gfx
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#endif
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77
Common/Gfx/Util/DWriteFontFileEnumerator.cpp
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77
Common/Gfx/Util/DWriteFontFileEnumerator.cpp
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@ -0,0 +1,77 @@
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "DWriteFontFileEnumerator.h"
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namespace Gfx {
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namespace Util {
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DWriteFontFileEnumerator::DWriteFontFileEnumerator(const std::vector<IDWriteFontFile*>& fontFiles) :
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m_RefCount(1),
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m_FontFiles(fontFiles),
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m_CurrentFontFileIndex(-1)
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{
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}
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ULONG STDMETHODCALLTYPE DWriteFontFileEnumerator::AddRef()
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{
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++m_RefCount;
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return m_RefCount;
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}
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ULONG STDMETHODCALLTYPE DWriteFontFileEnumerator::Release()
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{
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--m_RefCount;
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if (m_RefCount == 0)
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{
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delete this;
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return 0;
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}
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return m_RefCount;
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}
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HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::QueryInterface(IID const& riid, void** ppvObject)
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{
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if (riid == IID_IUnknown ||
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riid == __uuidof(IDWriteFontFileEnumerator))
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{
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*ppvObject = this;
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AddRef();
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return S_OK;
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}
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*ppvObject = NULL;
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return E_NOINTERFACE;
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}
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HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::MoveNext(BOOL* hasCurrentFile)
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{
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*hasCurrentFile = (++m_CurrentFontFileIndex < m_FontFiles.size());
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile)
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{
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IDWriteFontFile* currentFontFile = m_FontFiles[m_CurrentFontFileIndex];
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currentFontFile->AddRef();
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*fontFile = currentFontFile;
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return S_OK;
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}
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} // namespace Util
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} // namespace Gfx
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56
Common/Gfx/Util/DWriteFontFileEnumerator.h
Normal file
56
Common/Gfx/Util/DWriteFontFileEnumerator.h
Normal file
@ -0,0 +1,56 @@
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/*
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Copyright (C) 2013 Birunthan Mohanathas
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
|
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|
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You should have received a copy of the GNU General Public License
|
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef RM_GFX_UTIL_DWRITEFONTFILEENUMERATOR_H_
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#define RM_GFX_UTIL_DWRITEFONTFILEENUMERATOR_H_
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#include <vector>
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#include <dwrite.h>
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namespace Gfx {
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namespace Util {
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// Implements IDWriteFontFileEnumerator by enumerating over std::vector<IDWriteFontFile*>.
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class DWriteFontFileEnumerator : public IDWriteFontFileEnumerator
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{
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public:
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DWriteFontFileEnumerator(const std::vector<IDWriteFontFile*>& fontFiles);
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// IUnknown
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID uuid, void** object) override;
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virtual ULONG STDMETHODCALLTYPE AddRef() override;
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virtual ULONG STDMETHODCALLTYPE Release() override;
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// IDWriteFontFileEnumerator
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virtual HRESULT STDMETHODCALLTYPE MoveNext(BOOL* hasCurrentFile) override;
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virtual HRESULT STDMETHODCALLTYPE GetCurrentFontFile(IDWriteFontFile** currentFontFile) override;
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private:
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ULONG m_RefCount;
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const std::vector<IDWriteFontFile*>& m_FontFiles;
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// Current index of |m_FontFiles|. The type is int instead of size_t as it starts from -1 as
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// required by IDWriteFontFileEnumerator.
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int m_CurrentFontFileIndex;
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};
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} // namespace Util
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} // namespace Gfx
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#endif
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