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rainmeter-studio/Common/Gfx/Util/WICBitmapLockDIB.cpp
2013-04-12 17:09:42 +03:00

92 lines
2.2 KiB
C++

/*
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 "WICBitmapLockDIB.h"
#include <cassert>
namespace Gfx {
namespace Util {
WICBitmapLockDIB::WICBitmapLockDIB(WICBitmapDIB* bitmap, const WICRect* lockRect) :
m_Bitmap(bitmap),
m_Rect(lockRect),
m_RefCount(1)
{
}
WICBitmapLockDIB::~WICBitmapLockDIB()
{
}
IFACEMETHODIMP WICBitmapLockDIB::QueryInterface(REFIID riid, void** ppvObject)
{
return E_NOTIMPL;
}
IFACEMETHODIMP_(ULONG) WICBitmapLockDIB::AddRef()
{
++m_RefCount;
return m_RefCount;
}
IFACEMETHODIMP_(ULONG) WICBitmapLockDIB::Release()
{
--m_RefCount;
if (m_RefCount == 0)
{
delete this;
return 0;
}
return m_RefCount;
}
IFACEMETHODIMP WICBitmapLockDIB::GetSize(UINT* puiWidth, UINT* puiHeight)
{
return m_Bitmap->GetSize(puiWidth, puiHeight);
}
IFACEMETHODIMP WICBitmapLockDIB::GetStride(UINT* pcbStride)
{
UINT width = 0;
m_Bitmap->GetSize(&width, nullptr);
if (pcbStride) *pcbStride = (width * 32 + 31) / 32 * 4;
return S_OK;
}
IFACEMETHODIMP WICBitmapLockDIB::GetDataPointer(UINT* pcbBufferSize, BYTE** ppbData)
{
UINT stride = 0;
GetStride(&stride);
if (pcbBufferSize) *pcbBufferSize = stride * m_Rect->Height;
if (ppbData) *ppbData = (BYTE*)&m_Bitmap->m_DIBSectionBufferPixels[m_Rect->Y * m_Rect->Width + m_Rect->X];
return S_OK;
}
IFACEMETHODIMP WICBitmapLockDIB::GetPixelFormat(WICPixelFormatGUID* pPixelFormat)
{
return m_Bitmap->GetPixelFormat(pPixelFormat);
}
} // namespace Util
} // namespace Gfx