rainmeter-studio/Common/Gfx/Util/DWriteFontFileEnumerator.cpp

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/*
Copyright (C) 2013 Birunthan Mohanathas
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "DWriteFontFileEnumerator.h"
namespace Gfx {
namespace Util {
DWriteFontFileEnumerator::DWriteFontFileEnumerator(const std::vector<IDWriteFontFile*>& fontFiles) :
m_RefCount(1),
m_FontFiles(fontFiles),
m_CurrentFontFileIndex(-1)
{
}
ULONG STDMETHODCALLTYPE DWriteFontFileEnumerator::AddRef()
{
++m_RefCount;
return m_RefCount;
}
ULONG STDMETHODCALLTYPE DWriteFontFileEnumerator::Release()
{
--m_RefCount;
if (m_RefCount == 0)
{
delete this;
return 0;
}
return m_RefCount;
}
HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::QueryInterface(IID const& riid, void** ppvObject)
{
if (riid == IID_IUnknown ||
riid == __uuidof(IDWriteFontFileEnumerator))
{
*ppvObject = this;
AddRef();
return S_OK;
}
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*ppvObject = nullptr;
return E_NOINTERFACE;
}
HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::MoveNext(BOOL* hasCurrentFile)
{
*hasCurrentFile = (++m_CurrentFontFileIndex < m_FontFiles.size());
return S_OK;
}
HRESULT STDMETHODCALLTYPE DWriteFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile)
{
IDWriteFontFile* currentFontFile = m_FontFiles[m_CurrentFontFileIndex];
currentFontFile->AddRef();
*fontFile = currentFontFile;
return S_OK;
}
} // namespace Util
} // namespace Gfx