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From Wojciech Lewandowski, "Attached are modifications to GraphicsWindowWin32. By default workaround is

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set to off. But could be activated/decativated via CMake as well as system
environment variable. I also modified src\osgViewer\CMakeLists.txt to turn
off this workaround by default as suggested."
This commit is contained in:
Robert Osfield
2008-11-14 17:03:59 +00:00
parent 2a1f7f0f7a
commit 10b5f0d041
4 changed files with 49 additions and 36 deletions
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79
src/osgViewer/GraphicsWindowWin32.cpp
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@@ -20,6 +20,7 @@
#include <osgViewer/api/Win32/PixelBufferWin32>
#include <osg/DeleteHandler>
#include <osg/ApplicationUsage>
#include <vector>
#include <map>
@@ -31,6 +32,8 @@ using namespace osgViewer;
namespace osgViewer
{
static osg::ApplicationUsageProxy GraphicsWindowWin32_e0(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_WIN32_NV_MULTIMON_MULTITHREAD_WORKAROUND on/off","Enable/disable duplicate makeCurrentContext call used as workaround for WinXP/NVidia/MultiView/MulitThread isues (pre 178.13 drivers).");
//
// Defines from the WGL_ARB_pixel_format specification document
// See http://www.opengl.org/registry/specs/ARB/wgl_pixel_format.txt
@@ -978,7 +981,8 @@ GraphicsWindowWin32::GraphicsWindowWin32( osg::GraphicsContext::Traits* traits )
_closeWindow(false),
_destroyWindow(false),
_destroying(false),
_appMouseCursor(LeftArrowCursor)
_appMouseCursor(LeftArrowCursor),
_applyWorkaroundForMultimonitorMultithreadNVidiaWin32Issues( false )
{
_traits = traits;
if (_traits->useCursor) setCursor(LeftArrowCursor);
@@ -1024,6 +1028,38 @@ void GraphicsWindowWin32::init()
_initialized = _ownsWindow ? createWindow() : setWindow(windowHandle);
_valid = _initialized;
// 2008/10/03
// Few days ago NVidia released WHQL certified drivers ver 178.13.
// These drivers (as well as former beta ver 177.92) were free from the bug described below.
// So it looks like its high time to make the workaround inactive by default.
// If you happen to still use earlier drivers and have problems consider changing to new ones or
// activate OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND macro def through CMake advanced vars.
#ifdef OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND
// 2008/05/12
// Workaround for Bugs in NVidia drivers for windows XP / multithreaded / dualview / multicore CPU
// affects GeForce 6x00, 7x00, 8x00 boards (others were not tested) driver versions 174.xx - 175.xx
// pre 174.xx had other issues so reverting is not an option (statitistics, fbo)
// drivers release 175.16 is the latest currently available
//
// When using OpenGL in threaded app ( main thread sets up context / renderer thread draws using it )
// first wglMakeCurrent seems to not work right and screw OpenGL context driver data:
// 1: succesive drawing shows a number of artifacts in TriangleStrips and TriangleFans
// 2: weird behaviour of FramBufferObjects (glGenFramebuffer generates already generated ids ...)
// Looks like repeating wglMakeCurrent call fixes all these issues
// wglMakeCurrent call can impact performance so I try to minimize number of
// wglMakeCurrent calls by checking current HDC and GL context
// and repeat wglMakeCurrent only when they change for current thread
_applyWorkaroundForMultimonitorMultithreadNVidiaWin32Issues = true;
#endif
const char* str = getenv("OSG_WIN32_NV_MULTIMON_MULTITHREAD_WORKAROUND");
if (str)
{
_applyWorkaroundForMultimonitorMultithreadNVidiaWin32Issues = (strcmp(str, "on")==0 || strcmp(str, "ON")==0 || strcmp(str, "On")==0 );
}
}
bool GraphicsWindowWin32::createWindow()
@@ -1664,39 +1700,18 @@ bool GraphicsWindowWin32::makeCurrentImplementation()
return false;
}
// 2008/10/03
// Few days ago NVidia released WHQL certified drivers ver 178.13.
// These drivers (as well as former beta ver 177.92) were free from the bug described below.
// So it looks like its high time to undef the workaround.
// If you happen to still use earlier drivers and have problems consider changing to new ones or
// activate OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND macro def through CMake advanced vars.
#ifdef OSG_MULTIMONITOR_MULTITHREAD_WIN32_NVIDIA_WORKAROUND
// 2008/05/12
// Workaround for Bugs in NVidia drivers for windows XP / multithreaded / dualview / multicore CPU
// affects GeForce 6x00, 7x00, 8x00 boards (others were not tested) driver versions 174.xx - 175.xx
// pre 174.xx had other issues so reverting is not an option (statitistics, fbo)
// drivers release 175.16 is the latest currently available
//
// When using OpenGL in threaded app ( main thread sets up context / renderer thread draws using it )
// first wglMakeCurrent seems to not work right and screw OpenGL context driver data:
// 1: succesive drawing shows a number of artifacts in TriangleStrips and TriangleFans
// 2: weird behaviour of FramBufferObjects (glGenFramebuffer generates already generated ids ...)
// Looks like repeating wglMakeCurrent call fixes all these issues
// wglMakeCurrent call can impact performance so I try to minimize number of
// wglMakeCurrent calls by checking current HDC and GL context
// and repeat wglMakeCurrent only when they change for current thread
if( ::wglGetCurrentDC() != _hdc ||
::wglGetCurrentContext() != _hglrc )
{
if (!::wglMakeCurrent(_hdc, _hglrc))
{
reportErrorForScreen("GraphicsWindowWin32::makeCurrentImplementation() - Unable to set current OpenGL rendering context", _traits->screenNum, ::GetLastError());
return false;
if( _applyWorkaroundForMultimonitorMultithreadNVidiaWin32Issues )
{
if( ::wglGetCurrentDC() != _hdc ||
::wglGetCurrentContext() != _hglrc )
{
if (!::wglMakeCurrent(_hdc, _hglrc))
{
reportErrorForScreen("GraphicsWindowWin32::makeCurrentImplementation() - Unable to set current OpenGL rendering context", _traits->screenNum, ::GetLastError());
return false;
}
}
}
#endif
if (!::wglMakeCurrent(_hdc, _hglrc))
{