Código C++:
Ver original
//#include <iostream> #include<stdio.h> #include<stdlib.h> #include<string.h> #include<X11/Xlib.h> #include <X11/Xutil.h> #include <X11/extensions/Xcomposite.h> #include <X11/extensions/Xfixes.h> #include<GL/gl.h> #include<GL/glx.h> #include <GL/glext.h> #include<GL/glu.h> #include <GL/glut.h> static PFNGLXBINDTEXIMAGEEXTPROC glXBindTexImageEXT = NULL; static PFNGLXRELEASETEXIMAGEEXTPROC glXReleaseTexImageEXT = NULL; Display *display; Window window; int value; float top,bottom; int nfbconfigs; GLuint texture; int i; GLXFBConfig *fbconfigs; Window getWindowIdFromName(Display *dpy, Window level, char *name) { Window *children; Window dmy; Window root; Window id; char *window_name; int i; unsigned int no_of_children; if (0 == XQueryTree(dpy, level, &dmy, &dmy, &children, &no_of_children)) return 0; for (i=0; i<no_of_children; i++) { if (XFetchName(dpy,children[i], &window_name)) { XFree(window_name); else { XFree(window_name); return children[i]; } } else { if (id = getWindowIdFromName(dpy, children[i], name)) return id; } } return 0; } void drawing(){ //sleep(1); /* draw using pixmap as texture */ glClearColor(0.25, 0.25, 0.25, 0.0); glClear(GL_COLOR_BUFFER_BIT); glPushMatrix(); glBegin (GL_QUADS); glVertex3f(-1.0f,1.0f,0.0f); glTexCoord2d(-1.0f,1.0f); glVertex3f(1.0f,1.0f,0.0f); glTexCoord2d(1.0f,1.0f); glVertex3f(1.0f,-1.0f,0.0f); glTexCoord2d(1.0f,-1.0f); glVertex3f(-1.0f,-1.0f,0.0f); glTexCoord2d(-1.0f,-1.0f); glEnd (); glPopMatrix(); glutSwapBuffers(); } int main(int argc, char **argv){ glutInit(&argc,argv); //glutInitDisplayMode (GLUT_SINGLE | GLUT_RGBA); glutInitWindowPosition(0,0); glXBindTexImageEXT = (PFNGLXBINDTEXIMAGEEXTPROC) glXGetProcAddress((GLubyte *) "glXBindTexImageEXT"); glXReleaseTexImageEXT = (PFNGLXRELEASETEXIMAGEEXTPROC) glXGetProcAddress((GLubyte*) "glXReleaseTexImageEXT"); if(!glXBindTexImageEXT || !glXReleaseTexImageEXT) { //return 1; } display = XOpenDisplay(NULL); window = XDefaultRootWindow(display); XCompositeRedirectSubwindows (display, window, CompositeRedirectAutomatic); XSelectInput (display, window, SubstructureNotifyMask); XWindowAttributes attrib; XGetWindowAttributes (display, window, &attrib); VisualID visualid = XVisualIDFromVisual (attrib.visual); fbconfigs = glXGetFBConfigs (display, XDefaultScreen(display), &nfbconfigs); for (i = 0; i < nfbconfigs; i++) { XVisualInfo *visinfo = glXGetVisualFromFBConfig (display, fbconfigs[i]); if (!visinfo || visinfo->visualid != visualid) continue; glXGetFBConfigAttrib (display, fbconfigs[i], GLX_DRAWABLE_TYPE, &value); if (!(value & GLX_PIXMAP_BIT)) continue; glXGetFBConfigAttrib (display, fbconfigs[i], GLX_BIND_TO_TEXTURE_TARGETS_EXT, &value); if (!(value & GLX_TEXTURE_2D_BIT_EXT)) continue; glXGetFBConfigAttrib (display, fbconfigs[i], GLX_BIND_TO_TEXTURE_RGBA_EXT, &value); if (value == False) { glXGetFBConfigAttrib (display, fbconfigs[i], GLX_BIND_TO_TEXTURE_RGB_EXT, &value); if (value == False) continue; } glXGetFBConfigAttrib (display, fbconfigs[i], GLX_Y_INVERTED_EXT, &value); if (value == True) { top = 0.0f; bottom = 1.0f; } else { top = 1.0f; bottom = 0.0f; } break; } if (i == nfbconfigs){ /* error 1 */ } //Window wind = getWindowIdFromName(display,window,"Qt"); Pixmap pixmap = XCompositeNameWindowPixmap (display, window); const int pixmapAttribs[] = { GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT, GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGBA_EXT, GLX_MIPMAP_TEXTURE_EXT, None }; GLXPixmap glxpixmap = glXCreatePixmap (display, fbconfigs[i], pixmap, pixmapAttribs); gluOrtho2D(0,attrib.width,0,attrib.height); glEnable(GL_TEXTURE_2D); glGenTextures (1, &texture); glBindTexture (GL_TEXTURE_2D, texture); //XGrabServer(display); glXBindTexImageEXT (display, glxpixmap, GLX_FRONT_LEFT_EXT, NULL); glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //XUngrabServer(display); //glXReleaseTexImageEXT (display,glxpixmap,GLX_FRONT_LEFT_EXT); glutInitWindowSize(500,500); glutCreateWindow("simplex"); glutDisplayFunc(drawing); //glutIdleFunc(drawing); glutMainLoop(); return 0; }
cualquier ayuda estaré muy agradecido y esto servira para cualquiera que se aventure con este tipo de aplicaciones
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