rainmeter-studio/Common/Gfx/Util/WICBitmapDIB.h

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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.
*/
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#ifndef RM_GFX_UTIL_WICBITMAPDIB_H_
#define RM_GFX_UTIL_WICBITMAPDIB_H_
#include <Windows.h>
#include <GdiPlus.h>
#include <wincodec.h>
namespace Gfx {
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namespace Util {
// Allows the use of a DIB section (HBITMAP) in Direct2D as a WIC bitmap. It is assumed that this
// class is used only with 32bpp PARGB bitmaps and using a sigle thread.
//
// This class does not follow the COM reference count model. RTTI is used instead. This class
// implements only the bare essentials in order to use a DIB section as a Direct2D render target.
class WICBitmapDIB : public IWICBitmap
{
public:
WICBitmapDIB();
~WICBitmapDIB();
void Resize(UINT w, UINT h);
HBITMAP GetHandle() const { return m_DIBSectionBuffer; }
BYTE* GetData() const { return (BYTE*)m_DIBSectionBufferPixels; }
// IUnknown
IFACEMETHOD(QueryInterface)(REFIID riid, void** ppvObject);
IFACEMETHOD_(ULONG, AddRef)();
IFACEMETHOD_(ULONG, Release)();
// IWICBitmapSource
IFACEMETHOD(GetSize)(UINT* puiWidth, UINT* puiHeight);
IFACEMETHOD(GetPixelFormat)(WICPixelFormatGUID* pPixelFormat);
IFACEMETHOD(GetResolution)(double* pDpiX, double* pDpiY);
IFACEMETHOD(CopyPalette)(IWICPalette* pIPalette);
IFACEMETHOD(CopyPixels)(const WICRect* prc, UINT cbStride, UINT cbBufferSize, BYTE* pbBuffer);
// IWICBitmap
IFACEMETHOD(Lock)(const WICRect* prcLock, DWORD flags, IWICBitmapLock** ppILock);
IFACEMETHOD(SetPalette)(IWICPalette* pIPalette);
IFACEMETHOD(SetResolution)(double dpiX, double dpiY);
private:
friend class WICBitmapLockDIB;
HBITMAP m_DIBSectionBuffer;
LPDWORD m_DIBSectionBufferPixels;
UINT m_W;
UINT m_H;
};
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} // namespace Util
} // namespace Gfx
#endif