bool GlxBackend::initBuffer() { if (!initFbConfig()) return false; if (overlayWindow()->create()) { // Try to create double-buffered window in the overlay XVisualInfo* visual = glXGetVisualFromFBConfig(display(), fbconfig); if (!visual) { qCritical() << "Failed to get visual from fbconfig"; return false; } XSetWindowAttributes attrs; attrs.colormap = XCreateColormap(display(), rootWindow(), visual->visual, AllocNone); window = XCreateWindow(display(), overlayWindow()->window(), 0, 0, displayWidth(), displayHeight(), 0, visual->depth, InputOutput, visual->visual, CWColormap, &attrs); glxWindow = glXCreateWindow(display(), fbconfig, window, NULL); overlayWindow()->setup(window); XFree(visual); } else { qCritical() << "Failed to create overlay window"; return false; } int vis_buffer; glXGetFBConfigAttrib(display(), fbconfig, GLX_VISUAL_ID, &vis_buffer); XVisualInfo* visinfo_buffer = glXGetVisualFromFBConfig(display(), fbconfig); qDebug() << "Buffer visual (depth " << visinfo_buffer->depth << "): 0x" << QString::number(vis_buffer, 16); XFree(visinfo_buffer); return true; }
bool GlxBackend::initBuffer() { if (!initFbConfig()) return false; if (overlayWindow()->create()) { xcb_connection_t * const c = connection(); // Try to create double-buffered window in the overlay xcb_visualid_t visual; glXGetFBConfigAttrib(display(), fbconfig, GLX_VISUAL_ID, (int *) &visual); if (!visual) { qCCritical(KWIN_CORE) << "The GLXFBConfig does not have an associated X visual"; return false; } xcb_colormap_t colormap = xcb_generate_id(c); xcb_create_colormap(c, false, colormap, rootWindow(), visual); const QSize size = screens()->size(); window = xcb_generate_id(c); xcb_create_window(c, visualDepth(visual), window, overlayWindow()->window(), 0, 0, size.width(), size.height(), 0, XCB_WINDOW_CLASS_INPUT_OUTPUT, visual, XCB_CW_COLORMAP, &colormap); glxWindow = glXCreateWindow(display(), fbconfig, window, NULL); overlayWindow()->setup(window); } else { qCCritical(KWIN_CORE) << "Failed to create overlay window"; return false; } return true; }