/* static */
bool wxGLContext::MakeCurrent(GLXDrawable drawable, GLXContext context)
{
if (wxGLCanvas::GetGLXVersion() >= 13)
return glXMakeContextCurrent( wxGetX11Display(), drawable, drawable, context);
else // GLX <= 1.2 doesn't have glXMakeContextCurrent()
return glXMakeCurrent( wxGetX11Display(), drawable, context);
}
/* static */
bool
wxGLCanvasX11::InitXVisualInfo(const int *attribList,
GLXFBConfig **pFBC,
XVisualInfo **pXVisual)
{
int data[512];
if ( !ConvertWXAttrsToGL(attribList, data, WXSIZEOF(data)) )
return false;
Display * const dpy = wxGetX11Display();
if ( GetGLXVersion() >= 13 )
{
int returned;
*pFBC = glXChooseFBConfig(dpy, DefaultScreen(dpy), data, &returned);
if ( *pFBC )
{
*pXVisual = glXGetVisualFromFBConfig(wxGetX11Display(), **pFBC);
if ( !*pXVisual )
{
XFree(*pFBC);
*pFBC = NULL;
}
}
}
else // GLX <= 1.2
{
*pFBC = NULL;
*pXVisual = glXChooseVisual(dpy, DefaultScreen(dpy), data);
}
return *pXVisual != NULL;
}
wxGLContext::wxGLContext(wxGLCanvas *gc, const wxGLContext *other)
{
if ( gc->GetGLXContextAttribs()[0] != 0 ) // OpenGL 3 context creation
{
XVisualInfo *vi = gc->GetXVisualInfo();
wxCHECK_RET( vi, wxT("invalid visual for OpenGL") );
// We need to create a temporary context to get the
// glXCreateContextAttribsARB function
GLXContext tempContext = glXCreateContext( wxGetX11Display(), vi,
NULL,
GL_TRUE );
wxCHECK_RET( tempContext, wxT("Couldn't create OpenGL context") );
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB
= (PFNGLXCREATECONTEXTATTRIBSARBPROC)
glXGetProcAddress((GLubyte *)"glXCreateContextAttribsARB");
if ( !glXCreateContextAttribsARB )
{
wxLogError(_("Core OpenGL profile is not supported by the OpenGL driver."));
return;
}
GLXFBConfig *fbc = gc->GetGLXFBConfig();
wxCHECK_RET( fbc, wxT("invalid GLXFBConfig for OpenGL") );
m_glContext = glXCreateContextAttribsARB( wxGetX11Display(), fbc[0],
other ? other->m_glContext : None,
GL_TRUE, gc->GetGLXContextAttribs() );
glXDestroyContext( wxGetX11Display(), tempContext );
}
else if ( wxGLCanvas::GetGLXVersion() >= 13 )
{
GLXFBConfig *fbc = gc->GetGLXFBConfig();
wxCHECK_RET( fbc, wxT("invalid GLXFBConfig for OpenGL") );
m_glContext = glXCreateNewContext( wxGetX11Display(), fbc[0], GLX_RGBA_TYPE,
other ? other->m_glContext : None,
GL_TRUE );
}
else // GLX <= 1.2
{
XVisualInfo *vi = gc->GetXVisualInfo();
wxCHECK_RET( vi, wxT("invalid visual for OpenGL") );
m_glContext = glXCreateContext( wxGetX11Display(), vi,
other ? other->m_glContext : None,
GL_TRUE );
}
wxASSERT_MSG( m_glContext, wxT("Couldn't create OpenGL context") );
}
/* static */
bool wxGLCanvasBase::IsExtensionSupported(const char *extension)
{
Display * const dpy = wxGetX11Display();
return IsExtensionInList(glXQueryExtensionsString(dpy, DefaultScreen(dpy)),
extension);
}
bool wxGLCanvasX11::SwapBuffers()
{
const Window xid = GetXWindow();
wxCHECK2_MSG( xid, return false, wxT("window must be shown") );
glXSwapBuffers(wxGetX11Display(), xid);
return true;
}
wxGLContext::~wxGLContext()
{
if ( !m_glContext )
return;
if ( m_glContext == glXGetCurrentContext() )
MakeCurrent(None, NULL);
glXDestroyContext( wxGetX11Display(), m_glContext );
}
wxGLContext::wxGLContext(wxGLCanvas *gc, const wxGLContext *other)
{
if ( wxGLCanvas::GetGLXVersion() >= 13 )
{
GLXFBConfig *fbc = gc->GetGLXFBConfig();
wxCHECK_RET( fbc, wxT("invalid GLXFBConfig for OpenGL") );
m_glContext = glXCreateNewContext( wxGetX11Display(), fbc[0], GLX_RGBA_TYPE,
other ? other->m_glContext : None,
GL_TRUE );
}
else // GLX <= 1.2
{
XVisualInfo *vi = gc->GetXVisualInfo();
wxCHECK_RET( vi, wxT("invalid visual for OpenGL") );
m_glContext = glXCreateContext( wxGetX11Display(), vi,
other ? other->m_glContext : None,
GL_TRUE );
}
wxASSERT_MSG( m_glContext, wxT("Couldn't create OpenGL context") );
}
/* static */
int wxGLCanvasX11::GetGLXVersion()
{
static int s_glxVersion = 0;
if ( s_glxVersion == 0 )
{
// check the GLX version
int glxMajorVer, glxMinorVer;
bool ok = glXQueryVersion(wxGetX11Display(), &glxMajorVer, &glxMinorVer);
wxASSERT_MSG( ok, wxT("GLX version not found") );
if (!ok)
s_glxVersion = 10; // 1.0 by default
else
s_glxVersion = glxMajorVer*10 + glxMinorVer;
}
return s_glxVersion;
}