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Add code showing stereo support to the OpenGL cube sample.

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Show how WX_GL_STEREO attribute can be used, if available.

See #15434.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74819 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2013-09-15 00:16:44 +00:00
parent e3735e7a9f
commit e848186687
2 changed files with 114 additions and 19 deletions
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113
samples/opengl/cube/cube.cpp
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@@ -268,22 +268,38 @@ bool MyApp::OnInit()
int MyApp::OnExit()
{
delete m_glContext;
delete m_glStereoContext;
return wxApp::OnExit();
}
TestGLContext& MyApp::GetContext(wxGLCanvas *canvas)
TestGLContext& MyApp::GetContext(wxGLCanvas *canvas, bool useStereo)
{
if ( !m_glContext )
TestGLContext *glContext;
if ( useStereo )
{
// Create the OpenGL context for the first window which needs it:
// subsequently created windows will all share the same context.
m_glContext = new TestGLContext(canvas);
if ( !m_glStereoContext )
{
// Create the OpenGL context for the first stereo window which needs it:
// subsequently created windows will all share the same context.
m_glStereoContext = new TestGLContext(canvas);
}
glContext = m_glStereoContext;
}
else
{
if ( !m_glContext )
{
// Create the OpenGL context for the first mono window which needs it:
// subsequently created windows will all share the same context.
m_glContext = new TestGLContext(canvas);
}
glContext = m_glContext;
}
m_glContext->SetCurrent(*canvas);
glContext->SetCurrent(*canvas);
return *m_glContext;
return *glContext;
}
// ----------------------------------------------------------------------------
@@ -296,18 +312,30 @@ BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
EVT_TIMER(SpinTimer, TestGLCanvas::OnSpinTimer)
END_EVENT_TABLE()
TestGLCanvas::TestGLCanvas(wxWindow *parent)
TestGLCanvas::TestGLCanvas(wxWindow *parent, int *attribList)
// With perspective OpenGL graphics, the wxFULL_REPAINT_ON_RESIZE style
// flag should always be set, because even making the canvas smaller should
// be followed by a paint event that updates the entire canvas with new
// viewport settings.
: wxGLCanvas(parent, wxID_ANY, NULL /* attribs */,
: wxGLCanvas(parent, wxID_ANY, attribList,
wxDefaultPosition, wxDefaultSize,
wxFULL_REPAINT_ON_RESIZE),
m_xangle(30.0),
m_yangle(30.0),
m_spinTimer(this,SpinTimer)
m_spinTimer(this,SpinTimer),
m_useStereo(false),
m_stereoWarningAlreadyDisplayed(false)
{
if ( attribList )
{
int i = 0;
while ( attribList[i] != 0 )
{
if ( attribList[i] == WX_GL_STEREO )
m_useStereo = true;
++i;
}
}
}
void TestGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
@@ -323,11 +351,36 @@ void TestGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
// is wrong when next another canvas is repainted.
const wxSize ClientSize = GetClientSize();
TestGLContext& canvas = wxGetApp().GetContext(this);
TestGLContext& canvas = wxGetApp().GetContext(this, m_useStereo);
glViewport(0, 0, ClientSize.x, ClientSize.y);
// Render the graphics and swap the buffers.
canvas.DrawRotatedCube(m_xangle, m_yangle);
GLboolean quadStereoSupported;
glGetBooleanv( GL_STEREO, &quadStereoSupported);
if ( quadStereoSupported )
{
glDrawBuffer( GL_BACK_LEFT );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-0.47f, 0.53f, -0.5f, 0.5f, 1.0f, 3.0f);
canvas.DrawRotatedCube(m_xangle, m_yangle);
CheckGLError();
glDrawBuffer( GL_BACK_RIGHT );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-0.53f, 0.47f, -0.5f, 0.5f, 1.0f, 3.0f);
canvas.DrawRotatedCube(m_xangle, m_yangle);
CheckGLError();
}
else
{
canvas.DrawRotatedCube(m_xangle, m_yangle);
if ( m_useStereo && !m_stereoWarningAlreadyDisplayed )
{
m_stereoWarningAlreadyDisplayed = true;
wxLogError("Stereo not supported by the graphics card.");
}
}
SwapBuffers();
}
@@ -379,6 +432,21 @@ void TestGLCanvas::OnSpinTimer(wxTimerEvent& WXUNUSED(event))
Spin(0.0, 4.0);
}
wxString glGetwxString(GLenum name)
{
const GLubyte *v = glGetString(name);
if ( v == 0 )
{
// The error is not important. It is GL_INVALID_ENUM.
// We just want to clear the error stack.
glGetError();
return wxString();
}
return wxString((const char*)v);
}
// ----------------------------------------------------------------------------
// MyFrame: main application window
@@ -386,19 +454,23 @@ void TestGLCanvas::OnSpinTimer(wxTimerEvent& WXUNUSED(event))
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(wxID_NEW, MyFrame::OnNewWindow)
EVT_MENU(NEW_STEREO_WINDOW, MyFrame::OnNewStereoWindow)
EVT_MENU(wxID_CLOSE, MyFrame::OnClose)
END_EVENT_TABLE()
MyFrame::MyFrame()
MyFrame::MyFrame( bool stereoWindow )
: wxFrame(NULL, wxID_ANY, wxT("wxWidgets OpenGL Cube Sample"))
{
new TestGLCanvas(this);
int stereoAttribList[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_STEREO, 0 };
new TestGLCanvas(this, stereoWindow ? stereoAttribList : NULL);
SetIcon(wxICON(sample));
// Make a menubar
wxMenu *menu = new wxMenu;
menu->Append(wxID_NEW);
menu->Append(NEW_STEREO_WINDOW, "New Stereo Window");
menu->AppendSeparator();
menu->Append(wxID_CLOSE);
wxMenuBar *menuBar = new wxMenuBar;
@@ -415,6 +487,15 @@ MyFrame::MyFrame()
static const int attribs[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, 0 };
wxLogStatus("Double-buffered display %s supported",
wxGLCanvas::IsDisplaySupported(attribs) ? "is" : "not");
if ( stereoWindow )
{
const wxString vendor = glGetwxString(GL_VENDOR).Lower();
const wxString renderer = glGetwxString(GL_RENDERER).Lower();
if ( vendor.find("nvidia") != wxString::npos &&
renderer.find("quadro") == wxString::npos )
ShowFullScreen(true);
}
}
void MyFrame::OnClose(wxCommandEvent& WXUNUSED(event))
@@ -428,3 +509,7 @@ void MyFrame::OnNewWindow( wxCommandEvent& WXUNUSED(event) )
new MyFrame();
}
void MyFrame::OnNewStereoWindow( wxCommandEvent& WXUNUSED(event) )
{
new MyFrame(true);
}