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looking-glass/host/Capture/DXGI.cpp

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/*
KVMGFX Client - A KVM Client for VGA Passthrough
Copyright (C) 2017 Geoffrey McRae <geoff@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
*/
#include "DXGI.h"
using namespace Capture;
#include "common\debug.h"
DXGI::DXGI() :
m_initialized(false),
m_dxgiFactory(NULL),
m_device(NULL),
m_deviceContext(NULL),
m_dup(NULL),
m_texture(NULL),
m_pointer(NULL)
{
}
DXGI::~DXGI()
{
}
bool DXGI::Initialize()
{
if (m_initialized)
DeInitialize();
HRESULT status;
status = CreateDXGIFactory1(__uuidof(IDXGIFactory1), (void **)(&m_dxgiFactory));
if (FAILED(status))
{
DEBUG_ERROR("Failed to create DXGIFactory: %08x", status);
return false;
}
bool done = false;
CComPtr<IDXGIAdapter1> adapter;
for (int i = 0; m_dxgiFactory->EnumAdapters1(i, &adapter) != DXGI_ERROR_NOT_FOUND; i++)
{
CComPtr<IDXGIOutput> output;
for (int i = 0; adapter->EnumOutputs(i, &output) != DXGI_ERROR_NOT_FOUND; i++)
{
DXGI_OUTPUT_DESC outputDesc;
output->GetDesc(&outputDesc);
if (!outputDesc.AttachedToDesktop)
{
output.Release();
continue;
}
m_output = output;
if (!m_output)
{
output.Release();
adapter.Release();
DEBUG_ERROR("Failed to get IDXGIOutput1");
DeInitialize();
return false;
}
m_width = outputDesc.DesktopCoordinates.right - outputDesc.DesktopCoordinates.left;
m_height = outputDesc.DesktopCoordinates.bottom - outputDesc.DesktopCoordinates.top;
output.Release();
done = true;
break;
}
if (done)
break;
adapter.Release();
}
if (!done)
{
DEBUG_ERROR("Failed to locate a valid output device");
DeInitialize();
return false;
}
static const D3D_FEATURE_LEVEL featureLevels[] = {
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0,
D3D_FEATURE_LEVEL_9_3,
D3D_FEATURE_LEVEL_9_2,
D3D_FEATURE_LEVEL_9_1
};
status = D3D11CreateDevice(
adapter,
D3D_DRIVER_TYPE_UNKNOWN,
NULL,
D3D11_CREATE_DEVICE_DEBUG,
featureLevels, ARRAYSIZE(featureLevels),
D3D11_SDK_VERSION,
&m_device,
&m_featureLevel,
&m_deviceContext
);
adapter.Release();
if (FAILED(status))
{
DEBUG_ERROR("Failed to create D3D11 device");
DeInitialize();
return false;
}
// we try this twice just incase we still get an error
// on re-initialization
for(int i = 0; i < 2; ++i)
{
status = m_output->DuplicateOutput(m_device, &m_dup);
if (SUCCEEDED(status))
break;
Sleep(200);
}
if (FAILED(status))
{
DEBUG_ERROR("DuplicateOutput Failed: %08x", status);
DeInitialize();
return false;
}
D3D11_TEXTURE2D_DESC texDesc;
ZeroMemory(&texDesc, sizeof(texDesc));
texDesc.Width = m_width;
texDesc.Height = m_height;
texDesc.MipLevels = 1;
texDesc.ArraySize = 1;
texDesc.SampleDesc.Count = 1;
texDesc.SampleDesc.Quality = 0;
texDesc.Usage = D3D11_USAGE_STAGING;
texDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
texDesc.BindFlags = 0;
texDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
texDesc.MiscFlags = 0;
status = m_device->CreateTexture2D(&texDesc, NULL, &m_texture);
if (FAILED(status))
{
DEBUG_ERROR("Failed to create texture: %08x", status);
DeInitialize();
return false;
}
m_initialized = true;
return true;
}
void DXGI::DeInitialize()
{
if (m_pointer)
{
delete[] m_pointer;
m_pointer = NULL;
m_pointerBufSize = 0;
}
if (m_texture)
m_texture.Release();
if (m_dup)
m_dup.Release();
if (m_output)
m_output.Release();
if (m_deviceContext)
m_deviceContext.Release();
if (m_device)
m_device.Release();
if (m_dxgiFactory)
m_dxgiFactory.Release();
m_initialized = false;
}
bool DXGI::ReInitialize()
{
DeInitialize();
/*
DXGI needs some time when mode switches occur, failing to do so causes
failure to start and exceptions internal to DXGI
*/
Sleep(200);
return Initialize();
}
FrameType DXGI::GetFrameType()
{
if (!m_initialized)
return FRAME_TYPE_INVALID;
return FRAME_TYPE_ARGB;
}
FrameComp DXGI::GetFrameCompression()
{
if (!m_initialized)
return FRAME_COMP_NONE;
return FRAME_COMP_NONE;
}
size_t DXGI::GetMaxFrameSize()
{
if (!m_initialized)
return 0;
return m_width * m_height * 4;
}
bool DXGI::GrabFrame(FrameInfo & frame)
{
if (!m_initialized)
return false;
DXGI_OUTDUPL_FRAME_INFO frameInfo;
CComPtr<IDXGIResource> res;
HRESULT status;
for(int i = 0; i < 2; ++i)
{
status = m_dup->AcquireNextFrame(INFINITE, &frameInfo, &res);
if (SUCCEEDED(status))
break;
switch (status)
{
case DXGI_ERROR_ACCESS_LOST: // desktop switch, mode change or switch DWM on or off
case WAIT_ABANDONED: // this can happen also during desktop switches, not documented by MS though
{
// see if we can open the desktop, if not the secure desktop
// is active so just wait for it instead of aborting out
HDESK desktop = NULL;
while(!desktop)
{
desktop = OpenInputDesktop(0, TRUE, GENERIC_READ);
if (desktop)
break;
Sleep(100);
}
CloseDesktop(desktop);
if (!ReInitialize())
{
DEBUG_ERROR("Failed to ReInitialize after lost access to desktop");
return false;
}
continue;
}
default:
// unknown failure
DEBUG_INFO("AcquireNextFrame failed: %08x", status);
return false;
}
}
// retry count exceeded
if (FAILED(status))
{
m_dup->ReleaseFrame();
DEBUG_ERROR("Failed to acquire next frame");
return false;
}
CComQIPtr<ID3D11Texture2D> src = res;
if (!src)
{
m_dup->ReleaseFrame();
DEBUG_ERROR("Failed to get src ID3D11Texture2D");
return false;
}
D3D11_TEXTURE2D_DESC desc;
src->GetDesc(&desc);
m_deviceContext->CopyResource(m_texture, src);
// if the pointer shape has changed
if (frameInfo.PointerShapeBufferSize > 0)
{
if (m_pointerBufSize < frameInfo.PointerShapeBufferSize)
{
if (m_pointer)
delete[] m_pointer;
m_pointer = new BYTE[frameInfo.PointerShapeBufferSize];
m_pointerBufSize = frameInfo.PointerShapeBufferSize;
}
status = m_dup->GetFramePointerShape(m_pointerBufSize, m_pointer, &m_pointerSize, &m_shapeInfo);
if (!SUCCEEDED(status))
{
m_dup->ReleaseFrame();
DEBUG_ERROR("Failed to get the new pointer shape: %08x", status);
return false;
}
}
m_dup->ReleaseFrame();
res.Release();
src.Release();
CComQIPtr<IDXGISurface1> surface = m_texture;
if (!surface)
{
DEBUG_ERROR("Failed to get IDXGISurface1");
return false;
}
DXGI_MAPPED_RECT rect;
status = surface->Map(&rect, DXGI_MAP_READ);
if (FAILED(status))
{
DEBUG_ERROR("Failed to map surface: %08x", status);
return false;
}
m_width = desc.Width;
m_height = desc.Height;
frame.width = desc.Width;
frame.height = desc.Height;
frame.stride = rect.Pitch / 4;
frame.outSize = min(frame.bufferSize, m_height * rect.Pitch);
memcpy_s(frame.buffer, frame.bufferSize, rect.pBits, frame.outSize);
status = surface->Unmap();
// if we have a mouse update
if (frameInfo.LastMouseUpdateTime.QuadPart)
{
m_pointerVisible = frameInfo.PointerPosition.Visible;
m_pointerPos = frameInfo.PointerPosition.Position;
}
// if the pointer is to be drawn
if (m_pointerVisible)
{
const int maxHeight = min(m_shapeInfo.Height, desc.Height - m_pointerPos.y);
const int maxWidth = min(m_shapeInfo.Width , desc.Width - m_pointerPos.x);
switch (m_shapeInfo.Type)
{
case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_COLOR:
{
for(int y = abs(min(0, m_pointerPos.y)); y < maxHeight; ++y)
for (int x = abs(min(0, m_pointerPos.x)); x < maxWidth; ++x)
{
BYTE *src = (BYTE *)m_pointer + (m_shapeInfo.Pitch * y) + (x * 4);
BYTE *dst = (BYTE *)frame.buffer + (rect.Pitch * (y + m_pointerPos.y)) + ((x + m_pointerPos.x) * 4);
const unsigned int alpha = src[3] + 1;
const unsigned int inv = 256 - alpha;
dst[0] = (BYTE)((alpha * src[0] + inv * dst[0]) >> 8);
dst[1] = (BYTE)((alpha * src[1] + inv * dst[1]) >> 8);
dst[2] = (BYTE)((alpha * src[2] + inv * dst[2]) >> 8);
}
break;
}
case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MASKED_COLOR:
{
for (int y = abs(min(0, m_pointerPos.y)); y < maxHeight; ++y)
for (int x = abs(min(0, m_pointerPos.x)); x < maxWidth; ++x)
{
UINT32 *src = (UINT32 *)m_pointer + ((m_shapeInfo.Pitch/4) * y) + x;
UINT32 *dst = (UINT32 *)frame.buffer + (frame.stride * (y + m_pointerPos.y)) + (x + m_pointerPos.x);
if (*src & 0xff000000)
*dst = 0xff000000 | (*dst ^ *src);
else *dst = 0xff000000 | *src;
}
break;
}
case DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MONOCHROME:
{
for (int y = abs(min(0, m_pointerPos.y)); y < maxHeight / 2; ++y)
for (int x = abs(min(0, m_pointerPos.x)); x < maxWidth; ++x)
{
UINT8 *srcAnd = (UINT8 *)m_pointer + (m_shapeInfo.Pitch * y) + (x/8);
UINT8 *srcXor = srcAnd + m_shapeInfo.Pitch * (m_shapeInfo.Height / 2);
UINT32 *dst = (UINT32 *)frame.buffer + (frame.stride * (y + m_pointerPos.y)) + (x + m_pointerPos.x);
const BYTE mask = 0x80 >> (x % 8);
const UINT32 andMask = (*srcAnd & mask) ? 0xFFFFFFFF : 0xFF000000;
const UINT32 xorMask = (*srcXor & mask) ? 0x00FFFFFF : 0x00000000;
*dst = (*dst & andMask) ^ xorMask;
}
break;
}
}
}
if (FAILED(status))
{
DEBUG_ERROR("Failed to unmap surface: %08x", status);
return false;
}
return true;
}
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