root / rgbdslam / external / siftgpu / src / SiftGPU / LiteWindow.h @ 9240aaa3
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#ifndef LITE_WINDOW_H
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#define LITE_WINDOW_H
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//#define WINDOW_PREFER_GLUT
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#if defined(WINDOW_PREFER_GLUT)
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#ifdef __APPLE__
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#include "GLUT/glut.h" |
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#else
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#include "GL/glut.h" |
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#endif
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//for apple, use GLUT to create the window..
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class LiteWindow |
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{ |
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int glut_id;
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public:
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LiteWindow() { glut_id = 0; }
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int IsValid() { return glut_id > 0; } |
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virtual ~LiteWindow() { if(glut_id > 0) glutDestroyWindow(glut_id); } |
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void MakeCurrent() { glutSetWindow(glut_id); }
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void Create(int x = -1, int y = -1, const char* display = NULL) |
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{ |
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static int _glut_init_called = 0; |
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if(glut_id != 0) return; |
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//see if there is an existing window
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if(_glut_init_called) glut_id = glutGetWindow();
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//create one if no glut window exists
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if(glut_id != 0) return; |
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if(_glut_init_called == 0) |
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{ |
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int argc = 1; |
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char * argv[4] = { "-iconic", 0 , 0, 0}; |
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if(display)
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{ |
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argc = 3;
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argv[1] = "-display"; |
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argv[2] = (char*) display; |
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} |
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glutInit(&argc, argv); |
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glutInitDisplayMode (GLUT_RGBA ); |
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_glut_init_called = 1;
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} |
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if(x != -1) glutInitWindowPosition(x, y); |
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if(display || x != -1) std::cout << "Using display [" |
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<< (display? display : "\0" )<< "] at (" << x << "," << y << ")\n"; |
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glut_id = glutCreateWindow ("SIFT_GPU_GLUT");
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glutHideWindow(); |
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} |
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}; |
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#elif defined( _WIN32)
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#ifndef _INC_WINDOWS
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h> |
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#endif
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class LiteWindow |
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{ |
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HWND hWnd; |
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HGLRC hContext; |
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HDC hdc; |
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public:
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LiteWindow() |
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{ |
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hWnd = NULL;
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hContext = NULL;
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hdc = NULL;
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} |
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virtual ~LiteWindow() |
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{ |
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if(hContext)wglDeleteContext(hContext);
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if(hdc)ReleaseDC(hWnd, hdc);
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if(hWnd)DestroyWindow(hWnd);
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} |
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int IsValid()
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{ |
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return hContext != NULL; |
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} |
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//display is ignored under Win32
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void Create(int x = -1, int y = -1, const char* display = NULL) |
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{ |
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if(hContext) return; |
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WNDCLASSEX wcex = { sizeof(WNDCLASSEX), CS_HREDRAW | CS_VREDRAW,
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(WNDPROC)DefWindowProc, 0, 4, 0, 0, 0, 0, 0, |
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("SIFT_GPU_LITE"), 0}; |
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RegisterClassEx(&wcex); |
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hWnd = CreateWindow("SIFT_GPU_LITE", "SIFT_GPU", 0, |
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CW_USEDEFAULT, CW_USEDEFAULT, |
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100, 100, NULL, NULL, 0, 0); |
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//move the window so that it can be on the second monitor
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if(x !=-1) |
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{ |
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MoveWindow(hWnd, x, y, 100, 100, 0); |
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std::cout << "CreateWindow at (" << x << "," << y<<")\n"; |
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} |
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///////////////////////////////////////////////////
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PIXELFORMATDESCRIPTOR pfd = |
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{ |
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sizeof(PIXELFORMATDESCRIPTOR), 1, |
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PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL , |
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PFD_TYPE_RGBA,16,0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 |
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}; |
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hdc=GetDC(hWnd); |
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////////////////////////////////////
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int pixelformat = ChoosePixelFormat(hdc, &pfd);
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DescribePixelFormat(hdc, pixelformat, sizeof(pfd), &pfd);
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SetPixelFormat(hdc, pixelformat, &pfd); |
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hContext = wglCreateContext(hdc); |
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} |
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void MakeCurrent()
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{ |
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wglMakeCurrent(hdc, hContext); |
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} |
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}; |
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#else
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#include <unistd.h> |
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#include <X11/Xlib.h> |
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#include <GL/glx.h> |
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class LiteWindow |
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{ |
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Display* xDisplay; |
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XVisualInfo* xVisual; |
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Window xWin; |
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GLXContext xContext; |
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Colormap xColormap; |
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public:
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LiteWindow() |
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{ |
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xDisplay = NULL;
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xVisual = NULL;
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xWin = 0;
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xColormap = 0;
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xContext = NULL;
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} |
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int IsValid ()
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{ |
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return xContext != NULL && glXIsDirect(xDisplay, xContext); |
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} |
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virtual ~LiteWindow() |
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{ |
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if(xWin) XDestroyWindow(xDisplay, xWin);
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if(xContext) glXDestroyContext(xDisplay, xContext);
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if(xColormap) XFreeColormap(xDisplay, xColormap);
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if(xDisplay) XCloseDisplay(xDisplay);
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} |
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void Create(int x = 0, int y = 0, const char * display = NULL) |
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{ |
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if(xDisplay) return; |
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if(display) std::cout << "Using display ["<<display<<"]\n"; |
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xDisplay = XOpenDisplay(display && display[0] ? display : NULL); |
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if(xDisplay == NULL) return; |
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int attrib[] = {GLX_RGBA, GLX_RED_SIZE, 1, |
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GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1, 0 }; |
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xVisual = glXChooseVisual(xDisplay, DefaultScreen(xDisplay), attrib); |
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if(xVisual == NULL) return; |
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xColormap = XCreateColormap( |
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xDisplay, RootWindow(xDisplay, xVisual->screen), |
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xVisual->visual, AllocNone); |
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XSetWindowAttributes wa; |
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wa.event_mask = 0;
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wa.border_pixel = 0;
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wa.colormap = xColormap; |
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xWin = XCreateWindow( xDisplay, RootWindow(xDisplay, xVisual->screen) , |
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x, y, 100, 100, 0, xVisual->depth, |
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InputOutput, xVisual->visual, |
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CWBorderPixel |CWColormap | CWEventMask, &wa); |
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xContext = glXCreateContext(xDisplay, xVisual, 0, GL_TRUE);
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} |
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void MakeCurrent()
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{ |
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if(xContext) glXMakeCurrent(xDisplay, xWin, xContext);
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} |
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}; |
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#endif
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#endif
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