looking-glass/host/Capture/DXGI.h

/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com

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., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/

#pragma once

#include "ICapture.h"

#define W32_LEAN_AND_MEAN
#include <windows.h>
#include <dxgi1_2.h>
#include <d3d11.h>
#include <stdio.h>
#include <comdef.h>

_COM_SMARTPTR_TYPEDEF(IDXGIFactory1         , __uuidof(IDXGIFactory1         ));
_COM_SMARTPTR_TYPEDEF(ID3D11Device          , __uuidof(ID3D11Device          ));
_COM_SMARTPTR_TYPEDEF(ID3D11DeviceContext   , __uuidof(ID3D11DeviceContext   ));
_COM_SMARTPTR_TYPEDEF(IDXGIDevice           , __uuidof(IDXGIDevice           ));
_COM_SMARTPTR_TYPEDEF(IDXGIOutput1          , __uuidof(IDXGIOutput1          ));
_COM_SMARTPTR_TYPEDEF(IDXGIOutput           , __uuidof(IDXGIOutput           ));
_COM_SMARTPTR_TYPEDEF(IDXGIAdapter1         , __uuidof(IDXGIAdapter1         ));
_COM_SMARTPTR_TYPEDEF(IDXGIOutputDuplication, __uuidof(IDXGIOutputDuplication));
_COM_SMARTPTR_TYPEDEF(ID3D11Texture2D       , __uuidof(ID3D11Texture2D       ));
_COM_SMARTPTR_TYPEDEF(IDXGIResource         , __uuidof(IDXGIResource         ));

namespace Capture
{
  class DXGI : public ICapture
  {
  public:
    DXGI();
    ~DXGI();

    const char * GetName() { return "DXGI"; }

    bool Initialize(CaptureOptions * options);
    void DeInitialize();
    bool ReInitialize()
    {
      DeInitialize();
      /*
      DXGI needs some time when mode switches occur, failing to do so causes
      failure to start and exceptions internal to DXGI
      */
      Sleep(400);
      return Initialize(m_options);
    }

    enum FrameType GetFrameType();
    size_t GetMaxFrameSize();
    enum GrabStatus GrabFrame(struct FrameInfo & frame);

  private:
    void WaitForDesktop();

    CaptureOptions * m_options;

    bool          m_initialized;
    unsigned int  m_width;
    unsigned int  m_height;

    IDXGIFactory1Ptr                m_dxgiFactory;
    ID3D11DevicePtr                 m_device;
    D3D_FEATURE_LEVEL               m_featureLevel;
    ID3D11DeviceContextPtr          m_deviceContext;
    IDXGIOutput1Ptr                 m_output;
    IDXGIOutputDuplicationPtr       m_dup;
    bool                            m_releaseFrame;
    ID3D11Texture2DPtr              m_texture;
    D3D11_TEXTURE2D_DESC            m_desc;
    D3D11_MAPPED_SUBRESOURCE        m_mapping;
    bool                            m_surfaceMapped;
    BYTE *                          m_pointer;
    UINT                            m_pointerBufSize;
    UINT                            m_pointerSize;
    BOOL                            m_lastMouseVis;
    POINT                           m_lastMousePos;
  };
};