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5f03d7b235
It seems that Direct2D does not expect the underlying pixel data of the render target to change outside of the target draw commands while the render target exists. As a result, Direct2D may in some cases overwrite changes to the pixel data. This change changes the render target to be (re)created for each batch of Direct2D drawing operations as a temporary solution. As a side effect, a DIB section is now used as the render target bitmap.
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
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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_WICBITMAPDIB_H_
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#define RM_GFX_WICBITMAPDIB_H_
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#include <Windows.h>
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#include <GdiPlus.h>
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#include <wincodec.h>
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namespace Gfx {
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// Allows the use of a DIB section (HBITMAP) in Direct2D as a WIC bitmap. It is assumed that this
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// class is used only with 32bpp PARGB bitmaps and using a sigle thread.
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//
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// This class does not follow the COM reference count model. RTTI is used instead. This class
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// implements only the bare essentials in order to use a DIB section as a Direct2D render target.
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class WICBitmapDIB : public IWICBitmap
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{
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public:
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WICBitmapDIB();
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~WICBitmapDIB();
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void Resize(UINT w, UINT h);
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HBITMAP GetHandle() const { return m_DIBSectionBuffer; }
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BYTE* GetData() const { return (BYTE*)m_DIBSectionBufferPixels; }
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// IUnknown
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IFACEMETHOD(QueryInterface)(REFIID riid, void** ppvObject);
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IFACEMETHOD_(ULONG, AddRef)();
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IFACEMETHOD_(ULONG, Release)();
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// IWICBitmapSource
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IFACEMETHOD(GetSize)(UINT* puiWidth, UINT* puiHeight);
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IFACEMETHOD(GetPixelFormat)(WICPixelFormatGUID* pPixelFormat);
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IFACEMETHOD(GetResolution)(double* pDpiX, double* pDpiY);
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IFACEMETHOD(CopyPalette)(IWICPalette* pIPalette);
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IFACEMETHOD(CopyPixels)(const WICRect* prc, UINT cbStride, UINT cbBufferSize, BYTE* pbBuffer);
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// IWICBitmap
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IFACEMETHOD(Lock)(const WICRect* prcLock, DWORD flags, IWICBitmapLock** ppILock);
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IFACEMETHOD(SetPalette)(IWICPalette* pIPalette);
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IFACEMETHOD(SetResolution)(double dpiX, double dpiY);
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private:
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friend class WICBitmapLockDIB;
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HBITMAP m_DIBSectionBuffer;
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LPDWORD m_DIBSectionBufferPixels;
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UINT m_W;
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UINT m_H;
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};
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} // namespace Gfx
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#endif |