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From Paul Martz, osgViewer Win32 GL3 context creation support

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This commit is contained in:
Robert Osfield 2009-11-13 10:03:02 +00:00
parent 8238396099
commit 6649f51ff2
2 changed files with 91 additions and 3 deletions
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3
include/osgViewer/api/Win32/GraphicsWindowWin32
View File

@ -139,7 +139,8 @@ class OSGVIEWER_EXPORT GraphicsWindowWin32 : public osgViewer::GraphicsWindow
unsigned int& extendedStyle );
bool setPixelFormat();
HGLRC createContextImplementation();
void adaptKey( WPARAM wParam, LPARAM lParam, int& keySymbol, unsigned int& modifierMask );
void transformMouseXY(float& x, float& y);

91
src/osgViewer/GraphicsWindowWin32.cpp
View File

@ -20,6 +20,7 @@
#include <osgViewer/api/Win32/PixelBufferWin32>
#include <osgViewer/View>
#include <osg/GL>
#include <osg/DeleteHandler>
#include <osg/ApplicationUsage>
@ -99,6 +100,7 @@ static osg::ApplicationUsageProxy GraphicsWindowWin32_e0(osg::ApplicationUsage::
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
#define ERROR_INVALID_VERSION_ARB 0x2095
#endif
@ -1196,7 +1198,7 @@ bool GraphicsWindowWin32::createWindow()
// Create the OpenGL rendering context associated with this window
//
_hglrc = ::wglCreateContext(_hdc);
_hglrc = createContextImplementation();
if (_hglrc==0)
{
reportErrorForScreen("GraphicsWindowWin32::createWindow() - Unable to create OpenGL rendering context", _traits->screenNum, ::GetLastError());
@ -1609,6 +1611,91 @@ bool GraphicsWindowWin32::setPixelFormat()
return true;
}
HGLRC GraphicsWindowWin32::createContextImplementation()
{
HGLRC context( NULL );
if( OSG_GL3_FEATURES )
{
osg::notify( osg::INFO ) << "GL3: Attempting to create OpenGL3 context." << std::endl;
osg::notify( osg::INFO ) << "GL3: version: " << _traits->glContextVersion << std::endl;
osg::notify( osg::INFO ) << "GL3: context flags: " << _traits->glContextFlags << std::endl;
osg::notify( osg::INFO ) << "GL3: profile: " << _traits->glContextProfileMask << std::endl;
Win32WindowingSystem::OpenGLContext openGLContext;
if( !Win32WindowingSystem::getInterface()->getSampleOpenGLContext( openGLContext, _hdc, _screenOriginX, _screenOriginY ) )
{
reportErrorForScreen( "GL3: Can't create sample context.",
_traits->screenNum, ::GetLastError() );
}
else
{
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB =
( PFNWGLCREATECONTEXTATTRIBSARBPROC ) wglGetProcAddress( "wglCreateContextAttribsARB" );
if( wglCreateContextAttribsARB==0 )
{
reportErrorForScreen( "GL3: wglCreateContextAttribsARB not available.",
_traits->screenNum, ::GetLastError() );
}
else
{
unsigned int idx( 0 );
int attribs[ 16 ];
std::istringstream istr( _traits->glContextVersion );
unsigned int major, minor;
unsigned char dot;
istr >> major >> dot >> minor;
if( major < 3 )
osg::notify( osg::WARN ) << "GL3: Non-GL3 version number: " << _traits->glContextVersion << std::endl;
attribs[ idx++ ] = WGL_CONTEXT_MAJOR_VERSION_ARB;
attribs[ idx++ ] = major;
attribs[ idx++ ] = WGL_CONTEXT_MINOR_VERSION_ARB;
attribs[ idx++ ] = minor;
if( _traits->glContextFlags != 0 )
{
attribs[ idx++ ] = WGL_CONTEXT_FLAGS_ARB;
attribs[ idx++ ] = _traits->glContextFlags;
}
if( _traits->glContextProfileMask != 0 )
{
attribs[ idx++ ] = WGL_CONTEXT_PROFILE_MASK_ARB;
attribs[ idx++ ] = _traits->glContextProfileMask;
}
attribs[ idx++ ] = 0;
context = wglCreateContextAttribsARB( _hdc, 0, attribs );
if( context == NULL )
{
reportErrorForScreen( "GL3: wglCreateContextAttribsARB returned NULL.",
_traits->screenNum, ::GetLastError() );
}
else
{
osg::notify( osg::INFO ) << "GL3: context created successfully." << std::endl;
}
}
}
}
// TBD insert GL ES 2 suppurt, if required for Win32.
// If platform context creation fails for any reason,
// we'll create a standard context. This means you could
// build OSG for GL3, have the context creation fail
// (because you have the wrong driver), and end up with
// a GL3 context. Something else will likely fail down
// the line, as the GL3-built OSG will assume GL3 features
// are present.
//
// This is also the typical path for GL 1/2 context creation.
if( context == NULL )
context = ::wglCreateContext(_hdc);
return( context );
}
bool GraphicsWindowWin32::setWindowDecorationImplementation( bool decorated )
{
unsigned int windowStyle;
@ -1717,7 +1804,7 @@ bool GraphicsWindowWin32::realizeImplementation()
HDC _hdc;
HGLRC _hglrc;
} restoreContext;
_realized = true;
bool result = makeCurrent();
_realized = false;