Bool OpenGLGraphicDeviceLinux::OpenVersion( const RenderWindow & p_RenderOutput,
const Version & p_Version )
{
// Make sure the graphic device is not already open
if( m_Open )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] Already open.\n";
return false;
}
// Make sure the window is open
if( !p_RenderOutput.IsOpen( ) )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] The window is not open.\n";
return false;
}
// Get the Linux window by casting the Window class
/* const WindowLinux * pWindow = reinterpret_cast<const WindowLinux *>( &p_Window );
m_pWindowLinux = const_cast<WindowLinux *>( pWindow );
*/
// Get the window and display devices
::Display * pDisplay = p_RenderOutput.GetDisplayDevice( );
::Window window = p_RenderOutput.GetWindowDevice( );
int screen = p_RenderOutput.GetScreenDevice( );
// Error check the window and display devices.
if( pDisplay == NULL )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] The display from the renderOutput is NULL.\n";
return false;
}
if( window == 0 )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] The window from the renderOutput is 0.\n";
return false;
}
// Create the visual information
GLint Att[] =
{
GLX_RGBA, GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_DEPTH_SIZE, 16,
GLX_STENCIL_SIZE, 8,
0L, 0L
};
int fbElements = 0;
::GLXFBConfig *fbc = glXChooseFBConfig( pDisplay, screen, 0, &fbElements);
::XVisualInfo * pVisualInfo = NULL;
if( (pVisualInfo = glXChooseVisual( pDisplay, 0, Att ) ) == NULL )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] Can not choose visual information.\n";
return false;
}
// Create the color map and set it
if( !(m_Colormap = XCreateColormap( pDisplay, RootWindow( pDisplay, screen), pVisualInfo->visual, AllocNone ) ) )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] Can not create the colormap.\n";
XFree( pVisualInfo );
return false;
}
// Set the new color map
XSetWindowColormap( pDisplay, window, m_Colormap );
// Create a temporary context.
::GLXContext temporaryContext = glXCreateContext( pDisplay, pVisualInfo, NULL, GL_TRUE );
if( !temporaryContext )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] Can not create a regual OpenGL context.\n";
XFree( pVisualInfo );
return false;
}
// Make the temporary context to the current one.
glXMakeCurrent( pDisplay, window, temporaryContext );
// Clear the visual info since we are done with it.
XFree( pVisualInfo );
// Attributes for the OGL 3.3 context
int attribs[ ] =
{
GLX_CONTEXT_MAJOR_VERSION_ARB, static_cast<int>( p_Version.GetMajor( ) ),
GLX_CONTEXT_MINOR_VERSION_ARB, static_cast<int>( p_Version.GetMinor( ) ),
0
};
// We need the proc address for the function
// we are going to use for OGL 3.3 context creation.
GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = 0;
if( ( glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB" )) == NULL )
{
std::cout << "[OpenGLGraphicDeviceLinux::Open] Can not get the function for creating the context.\n";
return false;
}
// Get the old error X11 error handler and set a new one in order to track if the opengl context is valid.
g_XLibErrorCatched = false;
XErrorHandler oldErrorHandler = XSetErrorHandler( XLibErrorCatcher );
// Create the context
if( ( m_DeviceContext = glXCreateContextAttribsARB( pDisplay, *fbc, 0, true, attribs ) ) != NULL )
{
// Delete the old temporary context
glXDestroyContext( pDisplay, temporaryContext );
// Make the new OpenGL context to the current one.
glXMakeCurrent( pDisplay, window, m_DeviceContext );
}
// Reset the old X11 error handler
XSetErrorHandler( oldErrorHandler );
// Return false if we catched any error, or else the context is fine.
if( g_XLibErrorCatched )
{
return false;
}
/* // Filling the pixel fromat structure.
static PIXELFORMATDESCRIPTOR PFD = {
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16, //DepthBits,
8, //StencilBits,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};
// Choose and set the pixel format
GLuint PixelFormat;
if((PixelFormat = ChoosePixelFormat( p_RenderOutput.GetDeviceContextHandle( ), &PFD ) ) == 0)
{
std::cout<< "[OpenGLGraphicDeviceWin32::Open] Can not choose pixel format.\n";
return false;
}
if( ( SetPixelFormat( p_RenderOutput.GetDeviceContextHandle( ), PixelFormat, &PFD ) ) == false )
{
std::cout<< "[OpenGLGraphicDeviceWin32::Open] Can not set pixel format.\n";
return false;
}
// Create a temporary regual context.
// We need this context to create any other context.
HGLRC temporaryContext = wglCreateContext( p_RenderOutput.GetDeviceContextHandle( ) );
if( temporaryContext == NULL )
{
std::cout << "[OpenGLGraphicDeviceWin32::Open] Can not create a regular OpenGL context.\n";
return false;
}
// Make the temporary context to the current one
wglMakeCurrent( NULL, NULL );
wglMakeCurrent( p_RenderOutput.GetDeviceContextHandle( ), temporaryContext );
// Attributes for the OGL 3.3 context
int attribs[ ] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, static_cast<int>( p_Version.GetMajor( ) ),
WGL_CONTEXT_MINOR_VERSION_ARB, static_cast<int>( p_Version.GetMinor( ) ),
0
};
// We need the proc address for the function
// we are going to use for OGL 3.3 context creation.
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
if((wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress( "wglCreateContextAttribsARB" )) == NULL )
{
std::cout << "[OpenGLGraphicDeviceWin32::Open] Can not get the function for creating the context.\n";
return false;
}
// Create the context
if( ( m_Context = wglCreateContextAttribsARB( p_RenderOutput.GetDeviceContextHandle( ), 0, attribs) ) != NULL )
{
// Delete the old temporary context
wglMakeCurrent( NULL, NULL );
wglDeleteContext( temporaryContext );
// Make the new OpenGL context to the current one.
wglMakeCurrent( p_RenderOutput.GetDeviceContextHandle( ), m_Context );
}
*/
return true;
}
Bool OpenGLGraphicDeviceLinux::Open( const RenderWindow & p_RenderOutput,
const Version & p_Version )
{
// Make sure that the GD is not already open.
if( m_Open == true )
{
std::cout << "[OpenGLGraphicDeviceLinux::BindOpenGLExtensions] The graphic device is already loaded.\n";
return false;
}
// Make sure that the render output is loaded
if( p_RenderOutput.IsOpen( ) == false )
{
std::cout << "[OpenGLGraphicDeviceLinux::BindOpenGLExtensions] The render output is not loaded.\n";
return false;
}
// Store the version of the opengl context that we want to create.
// This function will create the best as possible if the version is set to 0.0
Version contextVersion( p_Version );
// Try to load the best context as possible if the version is set to the default version
if( contextVersion == Version::Default )
{
if( OpenBestVersion( p_RenderOutput, contextVersion ) != true )
{
return false;
}
}
// Try to load the requested context, if it fails, create the best context as possible.
else
{
if( OpenVersion( p_RenderOutput, contextVersion ) == false )
{
if( OpenBestVersion( p_RenderOutput, contextVersion ) != true )
{
return false;
}
}
}
// Bind the OpenGL extensions
if( OpenGL::BindOpenGLExtensions( contextVersion.GetMajor( ), contextVersion.GetMinor( ) ) != true )
{
//bitTrace( "[GraphicDeviceWin32::Open] Can not bind the OpenGL extensions.\n" );
std::cout << "[OpenGL::BindOpenGLExtensions] Binding opengl extensions failed.\n";
return false;
}
// Set the default viewport to the window's size
SetViewport( Vector2u32( 0, 0 ), p_RenderOutput.GetVideoMode( ).GetSize( ) );
// Set the some member varaibles
m_Open = true;
m_Version = contextVersion;
m_pRenderOutput = const_cast<RenderWindow*>( &p_RenderOutput );
// Set default settings.
DisableDepthTest( );
EnableTexture( );
DisableFaceCulling( );
DisableSmoothLines( );
// Return true at success.
return true;
}
