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    <p>Depends on your code. Usually the device context is created on each platform in a different way</p> <p>Windows:</p> <pre><code>hRC_ = wglCreateContextAttribsARB(hDC_, 0, attributes); // Create and OpenGL 3.x context based on the given attributes if(hRC_ == 0) { GLenum error = glGetError(); // ... handle error } wglMakeCurrent(nullptr, nullptr); // Remove the temporary context from being active wglDeleteContext(tempContext); // Delete the temporary OpenGL 2.1 context wglMakeCurrent(hDC_, hRC_); // Make our OpenGL 3.0 context current </code></pre> <p>X11/GLX:</p> <pre><code>const char *glxExts = glXQueryExtensionsString( display_, DefaultScreen( display_ ) ); if(isExtensionSupported( glxExts, "GLX_ARB_create_context" )) // If the OpenGL 3.x context creation extension is available { glXCreateContextAttribsARB = (GLXContext(*)(Display* dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list))glXGetProcAddressARB((GLubyte*)"glXCreateContextAttribsARB"); hRC_ = glXCreateContextAttribsARB(display_, fbConfigs_[0], 0, true, attributes); // Create and OpenGL 3.x context based on the given attributes if(!glXMakeCurrent(display_, window_, hRC_)) { throw BlueFramework::BlueCore::Exception("Making context current failed."); }; // Make our OpenGL 3.0 context current GLenum err = glewInit(); // Enable GLEW if (GLEW_OK != err) // If GLEW fails { std::cerr &lt;&lt; err &lt;&lt; std::endl; std::cerr &lt;&lt; "Error: " &lt;&lt; glewGetString(err) &lt;&lt; std::endl; throw BlueFramework::BlueCore::Exception("GLEW is not initialized!"); } } </code></pre> <p>There are also differences in the attributes handed over to XXXCreateContextAttribs:</p> <p>Windows:</p> <pre><code>WGL_CONTEXT_MAJOR_VERSION_ARB, majorVersion_, // Set the MAJOR version of OpenGL WGL_CONTEXT_MINOR_VERSION_ARB, miniorVersion_, // Set the MINOR version of OpenGL WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB // Set our OpenGL context to be forward com WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB ... </code></pre> <p>X11/GLX:</p> <pre><code>GLX_CONTEXT_MAJOR_VERSION_ARB, majorVersion_, // Set the MAJOR version of OpenGL GLX_CONTEXT_MINOR_VERSION_ARB, miniorVersion_, // Set the MINOR version of OpenGL GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB // Set our OpenGL context to be forward compatible //#ifdef _DEBUG | GLX_CONTEXT_DEBUG_BIT_ARB //#endif , GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB, 0 ... </code></pre> <p>After device creation the OpenGL dependent code is almost the same. To create a render context in Win you need to create a Window handle.</p> <p>Can look something like this:</p> <pre><code>// Register class WNDCLASSEX wcex; wcex.cbSize = sizeof( WNDCLASSEX ); wcex.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; wcex.lpfnWndProc = (WNDPROC)RenderWindow::controlEventsProcessor;//WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = nullptr;//LoadIcon( hInstance, ( LPCTSTR )IDI_TUTORIAL1 ); wcex.hCursor = LoadCursor( NULL, IDC_ARROW ); if(fullscreen_) { wcex.hbrBackground = ( HBRUSH )( COLOR_WINDOW + 1 ); } else { wcex.hbrBackground = ( HBRUSH )( COLOR_WINDOW + 1 ); } wcex.lpszMenuName = NULL; wcex.lpszClassName = wstrWindowClassName_.c_str(); //ss.str().c_str(); wcex.hIconSm = nullptr;//LoadIcon( wcex.hInstance, ( LPCTSTR )IDI_TUTORIAL1 ); if( !RegisterClassEx( &amp;wcex ) ) { BLUE_LOG_STREAM_EX( "BlueFramework::BlueGraphicsEngine::RenderWindow::initWindow", buw::eLogSeverityLevel::Error) &lt;&lt; "RegisterClassEx failed"; return E_FAIL; } // Create window hInstance = hInstance; RECT rc = { 0, 0, width, height }; if(!AdjustWindowRect( &amp;rc, WS_OVERLAPPEDWINDOW, FALSE )) { BLUE_LOG_STREAM_EX( "BlueFramework::BlueGraphicsEngine::RenderWindow::initWindow", buw::eLogSeverityLevel::Error) &lt;&lt; "AdjustWindowRect failed"; } if(fullscreen_) { hWnd_ = CreateWindowEx(0, wstrWindowClassName_.c_str(),//L"BlueRenderWindow",//ss.str().c_str(), L"Render Window", WS_EX_TOPMOST | WS_POPUP, // fullscreen values 0, 0, // the starting x and y positions should be 0 rc.right - rc.left, rc.bottom - rc.top, nullptr, nullptr, hInstance, nullptr); } else { hWnd_ = CreateWindowEx(0, wstrWindowClassName_.c_str(),//L"BlueRenderWindow",//ss.str().c_str(), L"Render Window", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, nullptr, nullptr, hInstance, nullptr); } </code></pre> <p>The counter part in X11/GLX can look something like this:</p> <pre><code>int attribs[] = { GLX_RENDER_TYPE, GLX_RGBA_BIT, GLX_X_RENDERABLE, True, GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR, GLX_DOUBLEBUFFER, True, GLX_RED_SIZE, 8, GLX_BLUE_SIZE, 8, GLX_GREEN_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_DEPTH_SIZE, 24, GLX_STENCIL_SIZE, 8, 0L //= None }; display_ = XOpenDisplay(nullptr); if(display_ == nullptr) { BLUE_LOG_STREAM_EX( "BlueFramework::BlueGraphicsEngine::RenderWindow::initWindow", buw::eLogSeverityLevel::Error) &lt;&lt; "Cannot connect to X-Server"; return false; } int screenNr = XDefaultScreen (display_); int numConfigs = 0; // glXCreateContextAttribsARB = (GLXContext(*)(Display* dpy, GLXFBConfig config, GLXContext share_context, Bool direct, const int *attrib_list))glXGetProcAddressARB((GLubyte*)"glXCreateContextAttribsARB"); glXChooseFBConfig = (GLXFBConfig*(*)(Display *dpy, int screen, const int *attrib_list, int *nelements))glXGetProcAddressARB((GLubyte*)"glXChooseFBConfig"); glXGetVisualFromFBConfig = (XVisualInfo*(*)(Display *dpy, GLXFBConfig config))glXGetProcAddressARB((GLubyte*)"glXGetVisualFromFBConfig"); fbConfigs_ = glXChooseFBConfig(display_, XDefaultScreen(display_), attribs, &amp;numConfigs); if(fbConfigs_ == nullptr) { BLUE_LOG_STREAM_EX( "BlueFramework::BlueGraphicsEngine::RenderWindow::initWindow", buw::eLogSeverityLevel::Error) &lt;&lt; "Failed to get framebuffer config"; return false; } XVisualInfo* vi = glXGetVisualFromFBConfig(display_, fbConfigs_[0]); if(vi == nullptr) { BLUE_LOG_STREAM_EX( "BlueFramework::BlueGraphicsEngine::RenderWindow::initWindow", buw::eLogSeverityLevel::Error) &lt;&lt; "No appropriate visual found (X-Server)"; return false; } bool doubleBuffered = true; Colormap cmap = XCreateColormap (display_, RootWindow (display_, vi-&gt;screen), vi-&gt;visual, AllocNone); XSetWindowAttributes attributes; attributes.background_pixmap = 0L; attributes.colormap = cmap; attributes.border_pixel = 0; </code></pre>
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    1. POCompile opengl program on Windows that was created in Ubuntu
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    1. USVertexwahn
    1. USVertexwahn
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      1. VTUpMod
    1. COCould you please rephrase all occurances of "Linux" with "X11/GLX", because the code in question is not specific to Linux and would work on Windows just as well, if there was a X11 server with proper OpenGL support running.
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      1. USdatenwolf
    2. CO@datenwolf: Done.
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    3. CO@datenwolf: doesn't cygwin have xserver with opengl support?
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