/* Copyright (c) Mark J. Kilgard, 1994. */ /* This program is freely distributable without licensing fees and is provided without guarantee or warrantee expressed or implied. This program is -not- in the public domain. */ #include #include #include #include #include #include #include /* for XA_RGB_DEFAULT_MAP atom */ #if defined(__vms) #include /* for XmuLookupStandardColormap */ #else #include /* for XmuLookupStandardColormap */ #endif #include #include "glutint.h" GLUTwindow *__glutCurrentWindow = NULL; GLUTwindow **__glutWindowList = NULL; int __glutWindowListSize = 0; GLUTstale *__glutStaleWindowList = NULL; void (*__glutFreeOverlayFunc) (GLUToverlay *); static void cleanWindowWorkList(GLUTwindow * window) { GLUTwindow **pEntry = &__glutWindowWorkList; GLUTwindow *entry = __glutWindowWorkList; /* Tranverse singly-linked window work list look for the window. */ while (entry) { if (entry == window) { /* Found it; delete it. */ *pEntry = entry->prevWorkWin; return; } else { pEntry = &entry->prevWorkWin; entry = *pEntry; } } } static void cleanStaleWindowList(GLUTwindow * window) { GLUTstale **pEntry = &__glutStaleWindowList; GLUTstale *entry = __glutStaleWindowList; /* Tranverse singly-linked stale window list look for the window ID. */ while (entry) { if (entry->window == window) { /* Found it; delete it. */ *pEntry = entry->next; free(entry); return; } else { pEntry = &entry->next; entry = *pEntry; } } } static GLUTwindow *__glutWindowCache = NULL; GLUTwindow * __glutGetWindow(Window win) { GLUTstale *entry; int i; /* Does win belong to the last window ID looked up? */ if (__glutWindowCache && (win == __glutWindowCache->win || (__glutWindowCache->overlay && win == __glutWindowCache->overlay->win))) { return __glutWindowCache; } /* Otherwise scan the window list looking for the window ID. */ for (i = 0; i < __glutWindowListSize; i++) { if (__glutWindowList[i]) { if (win == __glutWindowList[i]->win) { __glutWindowCache = __glutWindowList[i]; return __glutWindowCache; } if (__glutWindowList[i]->overlay) { if (win == __glutWindowList[i]->overlay->win) { __glutWindowCache = __glutWindowList[i]; return __glutWindowCache; } } } } /* Scan through destroyed overlay window IDs for which no DestroyNotify has yet been received. */ for (entry = __glutStaleWindowList; entry; entry = entry->next) { if (entry->win == win) return entry->window; } return NULL; } int glutGetWindow(void) { if (__glutCurrentWindow) { return __glutCurrentWindow->num + 1; } else { return 0; } } void __glutSetWindow(GLUTwindow * window) { /* It is tempting to try to short-circuit the call to glXMakeCurrent if we "know" we are going to make current to a window we are already current to. In fact, this assumption breaks when GLUT is expected to integrated with other OpenGL windowing APIs that also make current to OpenGL contexts. Since glXMakeCurrent short-circuits the "already bound" case, GLUT avoids the temptation to do so too. */ __glutCurrentWindow = window; glXMakeCurrent(__glutDisplay, __glutCurrentWindow->renderWin, __glutCurrentWindow->renderCtx); /* We should be careful to force a finish between each iteration through the GLUT main loop if indirect OpenGL contexts are in use; indirect contexts tend to have much longer latency because lots of OpenGL extension requests can queue up in the X protocol stream. We accomplish this by posting GLUT_FINISH_WORK to be done. */ if (!__glutCurrentWindow->isDirect) __glutPutOnWorkList(__glutCurrentWindow, GLUT_FINISH_WORK); /* If debugging is enabled, we'll want to check this window for any OpenGL errors every iteration through the GLUT main loop. To accomplish this, we post the GLUT_DEBUG_WORK to be done on this window. */ if (__glutDebug) __glutPutOnWorkList(__glutCurrentWindow, GLUT_DEBUG_WORK); } void glutSetWindow(int win) { GLUTwindow *window; if (win < 1 || win > __glutWindowListSize) { __glutWarning("glutWindowSet attempted on bogus window."); return; } window = __glutWindowList[win - 1]; if (!window) { __glutWarning("glutWindowSet attempted on bogus window."); return; } __glutSetWindow(window); } static int getUnusedWindowSlot(void) { int i; /* Look for allocated, unused slot. */ for (i = 0; i < __glutWindowListSize; i++) { if (!__glutWindowList[i]) { return i; } } /* Allocate a new slot. */ __glutWindowListSize++; if (__glutWindowList) { __glutWindowList = (GLUTwindow **) realloc(__glutWindowList, __glutWindowListSize * sizeof(GLUTwindow *)); } else { /* XXX Some realloc's do not correctly perform a malloc when asked to perform a realloc on a NULL pointer, though the ANSI C library spec requires this. */ __glutWindowList = (GLUTwindow **) malloc(sizeof(GLUTwindow *)); } if (!__glutWindowList) __glutFatalError("out of memory."); __glutWindowList[__glutWindowListSize - 1] = NULL; return __glutWindowListSize - 1; } static XVisualInfo * getVisualInfoCI(unsigned int mode) { static int bufSizeList[] = {16, 12, 8, 4, 2, 1, 0}; XVisualInfo *vi; int list[32]; int i, n = 0; list[n++] = GLX_BUFFER_SIZE; list[n++] = 1; if (GLUT_WIND_IS_DOUBLE(mode)) { list[n++] = GLX_DOUBLEBUFFER; } if (GLUT_WIND_IS_STEREO(mode)) { list[n++] = GLX_STEREO; } if (GLUT_WIND_HAS_DEPTH(mode)) { list[n++] = GLX_DEPTH_SIZE; list[n++] = 1; } if (GLUT_WIND_HAS_STENCIL(mode)) { list[n++] = GLX_STENCIL_SIZE; list[n++] = 1; } list[n] = (int) None; /* terminate list */ /* glXChooseVisual specify GLX_BUFFER_SIZE prefers the "smallest index buffer of at least the specified size". This would be reasonable if GLUT allowed the user to specify the required buffe size, but GLUT's display mode is too simplistic (easy to use?). GLUT should try to find the "largest". So start with a large buffer size and shrink until we find a matching one that exists. */ for (i = 0; bufSizeList[i]; i++) { /* XXX Assumes list[1] is where GLX_BUFFER_SIZE parameter is. */ list[1] = bufSizeList[i]; vi = glXChooseVisual(__glutDisplay, __glutScreen, list); if (vi) return vi; } return NULL; } static XVisualInfo * getVisualInfoRGB(unsigned int mode) { int list[32]; int n = 0; /* XXX Would a caching mechanism to minize the calls to glXChooseVisual? You'd have to reference count XVisualInfo* pointers. */ list[n++] = GLX_RGBA; list[n++] = GLX_RED_SIZE; list[n++] = 1; list[n++] = GLX_GREEN_SIZE; list[n++] = 1; list[n++] = GLX_BLUE_SIZE; list[n++] = 1; if (GLUT_WIND_HAS_ALPHA(mode)) { list[n++] = GLX_ALPHA_SIZE; list[n++] = 1; } if (GLUT_WIND_IS_DOUBLE(mode)) { list[n++] = GLX_DOUBLEBUFFER; } if (GLUT_WIND_IS_STEREO(mode)) { list[n++] = GLX_STEREO; } if (GLUT_WIND_HAS_DEPTH(mode)) { list[n++] = GLX_DEPTH_SIZE; list[n++] = 1; } if (GLUT_WIND_HAS_STENCIL(mode)) { list[n++] = GLX_STENCIL_SIZE; list[n++] = 1; } if (GLUT_WIND_HAS_ACCUM(mode)) { list[n++] = GLX_ACCUM_RED_SIZE; list[n++] = 1; list[n++] = GLX_ACCUM_GREEN_SIZE; list[n++] = 1; list[n++] = GLX_ACCUM_BLUE_SIZE; list[n++] = 1; if (GLUT_WIND_HAS_ALPHA(mode)) { list[n++] = GLX_ACCUM_ALPHA_SIZE; list[n++] = 1; } } #if defined(GLX_VERSION_1_1) && defined(GLX_SGIS_multisample) if (GLUT_WIND_IS_MULTISAMPLE(mode)) { if (!__glutIsSupportedByGLX("GLX_SGIS_multisample")) return NULL; list[n++] = GLX_SAMPLES_SGIS; /* XXX Is 4 a reasonable minimum acceptable number of samples? */ list[n++] = 4; } #endif list[n] = (int) None; /* terminate list */ return glXChooseVisual(__glutDisplay, __glutScreen, list); } XVisualInfo * __glutGetVisualInfo(unsigned int mode) { /* XXX GLUT_LUMINANCE not implemented for GLUT 3.0. */ if (GLUT_WIND_IS_LUMINANCE(mode)) return NULL; if (GLUT_WIND_IS_RGB(mode)) return getVisualInfoRGB(mode); else return getVisualInfoCI(mode); } XVisualInfo * __glutDetermineVisual( unsigned int displayMode, Bool * singleFake, XVisualInfo * (getVisualInfo) (unsigned int)) { XVisualInfo *vis; *singleFake = False; vis = getVisualInfo(displayMode); if (!vis) { /* Fallback cases when can't get exactly what was asked for... */ if (GLUT_WIND_IS_SINGLE(displayMode)) { /* If we can't find a single buffered visual, try looking for a double buffered visual. We can treat a double buffered visual as a single buffer visual by changing the draw buffer to GL_FRONT and treating any swap buffers as no-ops. */ displayMode |= GLUT_DOUBLE; vis = getVisualInfo(displayMode); *singleFake = True; } if (!vis && GLUT_WIND_IS_MULTISAMPLE(displayMode)) { /* If we can't seem to get multisampling (ie, not Reality Engine class graphics!), go without multisampling. It is up to the application to query how many multisamples were allocated (0 equals no multisampling) if the application is going to use multisampling for more than just antialiasing. */ displayMode &= ~GLUT_MULTISAMPLE; vis = getVisualInfo(displayMode); } } return vis; } void __glutSetupColormap(XVisualInfo * vi, GLUTcolormap ** colormap, Colormap * cmap) { Status status; XStandardColormap *standardCmaps; int i, numCmaps; switch (vi->class) { case PseudoColor: if (GLUT_WIND_IS_RGB(__glutDisplayMode)) { /* Mesa might return a PseudoColor visual for RGB mode. */ *colormap = NULL; if (MaxCmapsOfScreen(DefaultScreenOfDisplay(__glutDisplay)) == 1 && vi->visual == DefaultVisual(__glutDisplay, __glutScreen)) { char *private = getenv("MESA_PRIVATE_CMAP"); if (private) { /* User doesn't want to share colormaps. */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); } else { /* Share the root colormap. */ *cmap = DefaultColormap(__glutDisplay, __glutScreen); } } else { /* Get our own PseudoColor colormap. */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); } } else { /* CI mode, real GLX never returns a PseudoColor visual for RGB mode. */ *colormap = __glutAssociateColormap(vi); *cmap = (*colormap)->cmap; } break; case TrueColor: case DirectColor: *colormap = NULL; /* NULL if RGBA */ #ifndef SOLARIS_2_4_BUG /* Solaris 2.4 has a bug in its XmuLookupStandardColormap implementation. Please compile your Solaris 2.4 version of GLUT with -DSOLARIS_2_4_BUG to work around this bug. The symptom of the bug is that programs will get a BadMatch error from X_CreateWindow when creating a GLUT window because Solaris 2.4 creates a corrupted RGB_DEFAULT_MAP property. Note that this workaround prevents Colormap sharing between applications, perhaps leading unnecessary colormap installations or colormap flashing. */ status = XmuLookupStandardColormap(__glutDisplay, vi->screen, vi->visualid, vi->depth, XA_RGB_DEFAULT_MAP, /* replace */ False, /* retain */ True); if (status == 1) { status = XGetRGBColormaps(__glutDisplay, __glutRoot, &standardCmaps, &numCmaps, XA_RGB_DEFAULT_MAP); if (status == 1) for (i = 0; i < numCmaps; i++) if (standardCmaps[i].visualid == vi->visualid) { *cmap = standardCmaps[i].colormap; XFree(standardCmaps); return; } } #endif /* If no standard colormap but TrueColor, just make a private one. */ /* XXX Should do a better job of internal sharing for privately allocated TrueColor colormaps. */ /* XXX DirectColor probably needs ramps hand initialized! */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); break; case StaticColor: case StaticGray: case GrayScale: /* Mesa supports these visuals */ *colormap = NULL; *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); break; default: __glutFatalError( "could not allocate colormap for visual type: %d.", vi->class); } return; } void __glutDefaultDisplay(void) { /* XXX Remove the warning after GLUT 3.0. */ __glutWarning("The following is a new check for GLUT 3.0; update your code."); __glutFatalError( "display needed for window %d, but no display callback.", __glutCurrentWindow->num); } void __glutDefaultReshape(int width, int height) { GLUToverlay *overlay; /* Adjust the viewport of the window (and overlay if one exists). */ glXMakeCurrent(__glutDisplay, __glutCurrentWindow->win, __glutCurrentWindow->ctx); glViewport(0, 0, (GLsizei) width, (GLsizei) height); overlay = __glutCurrentWindow->overlay; if (overlay) { glXMakeCurrent(__glutDisplay, overlay->win, overlay->ctx); glViewport(0, 0, (GLsizei) width, (GLsizei) height); } /* Make sure we are current to the current layer (application should be able to count on the current layer not changing unless the application explicitly calls glutUseLayer). */ glXMakeCurrent(__glutDisplay, __glutCurrentWindow->renderWin, __glutCurrentWindow->renderCtx); } GLUTwindow * __glutCreateWindow(GLUTwindow * parent, int x, int y, int width, int height) { GLUTwindow *window; XSetWindowAttributes wa; unsigned long attribMask; int winnum; int i; if (!__glutDisplay) __glutOpenXConnection(NULL); winnum = getUnusedWindowSlot(); window = (GLUTwindow *) malloc(sizeof(GLUTwindow)); if (!window) __glutFatalError("out of memory."); window->num = winnum; window->vis = __glutDetermineVisual(__glutDisplayMode, &window->fakeSingle, __glutGetVisualInfo); if (!window->vis) { __glutFatalError( "visual with necessary capabilities not found."); } window->ctx = glXCreateContext(__glutDisplay, window->vis, None, __glutTryDirect); window->renderCtx = window->ctx; window->isDirect = glXIsDirect(__glutDisplay, window->ctx); if (__glutForceDirect) { if (!window->isDirect) __glutFatalError("direct rendering not possible."); } __glutSetupColormap(window->vis, &(window->colormap), &(window->cmap)); window->eventMask = StructureNotifyMask | ExposureMask; attribMask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask; wa.background_pixmap = None; wa.border_pixel = 0; wa.colormap = window->cmap; wa.event_mask = window->eventMask; if (parent) { if (parent->eventMask & GLUT_HACK_STOP_PROPAGATE_MASK) wa.event_mask |= GLUT_HACK_STOP_PROPAGATE_MASK; attribMask |= CWDontPropagate; wa.do_not_propagate_mask = parent->eventMask & GLUT_DONT_PROPAGATE_FILTER_MASK; } else { wa.do_not_propagate_mask = 0; } window->win = XCreateWindow(__glutDisplay, parent == NULL ? __glutRoot : parent->win, x, y, width, height, 0, window->vis->depth, InputOutput, window->vis->visual, attribMask, &wa); window->renderWin = window->win; window->width = width; window->height = height; window->forceReshape = True; window->parent = parent; if (parent) { window->siblings = parent->children; parent->children = window; } else { window->siblings = NULL; } window->overlay = NULL; window->children = NULL; window->display = __glutDefaultDisplay; window->reshape = __glutDefaultReshape; window->mouse = NULL; window->motion = NULL; window->visibility = NULL; window->passive = NULL; window->entry = NULL; window->special = NULL; window->buttonBox = NULL; window->dials = NULL; window->spaceMotion = NULL; window->spaceRotate = NULL; window->spaceButton = NULL; window->tabletMotion = NULL; window->tabletButton = NULL; window->tabletPos[0] = -1; window->tabletPos[1] = -1; window->keyboard = NULL; window->shownState = 0; window->visState = -1; /* not VisibilityUnobscured, VisibilityPartiallyObscured, or VisibilityFullyObscured */ window->entryState = -1; /* not EnterNotify or LeaveNotify */ window->damaged = 0; window->workMask = GLUT_MAP_WORK; window->desiredMapState = NormalState; window->desiredConfMask = 0; window->buttonUses = 0; window->cursor = GLUT_CURSOR_INHERIT; window->prevWorkWin = __glutWindowWorkList; __glutWindowWorkList = window; for (i = 0; i < GLUT_MAX_MENUS; i++) { window->menu[i] = 0; } __glutWindowList[winnum] = window; __glutSetWindow(window); if (window->fakeSingle) { glDrawBuffer(GL_FRONT); glReadBuffer(GL_FRONT); } return window; } static int findColormaps(GLUTwindow * window, Window * winlist, Colormap * cmaplist, int num, int max) { GLUTwindow *child; int i; /* Do not allow more entries that maximum number of colormaps! */ if (num >= max) return num; /* Is cmap for this window already on the list? */ for (i = 0; i < num; i++) { if (cmaplist[i] == window->cmap) goto normalColormapAlreadyListed; } /* Not found on the list; add colormap and window. */ winlist[num] = window->win; cmaplist[num] = window->cmap; num++; normalColormapAlreadyListed: /* Repeat above but for the overlay colormap if there one. */ if (window->overlay) { if (num >= max) return num; for (i = 0; i < num; i++) { if (cmaplist[i] == window->overlay->cmap) goto overlayColormapAlreadyListed; } winlist[num] = window->overlay->win; cmaplist[num] = window->overlay->cmap; num++; } overlayColormapAlreadyListed: /* Recursively search children. */ child = window->children; while (child) { num = findColormaps(child, winlist, cmaplist, num, max); child = child->siblings; } return num; } void __glutEstablishColormapsProperty(GLUTwindow * window) { static Atom wmColormapWindows = None; Window *winlist; Colormap *cmaplist; Status status; int maxcmaps, num; assert(!window->parent); maxcmaps = MaxCmapsOfScreen(ScreenOfDisplay(__glutDisplay, __glutScreen)); /* For portability reasons we don't use alloca for winlist and cmaplist, but we could. */ winlist = (Window *) malloc(maxcmaps * sizeof(Window)); cmaplist = (Colormap *) malloc(maxcmaps * sizeof(Colormap)); num = findColormaps(window, winlist, cmaplist, 0, maxcmaps); if (num < 2) { /* Property no longer needed; remove it. */ wmColormapWindows = XInternAtom(__glutDisplay, "WM_COLORMAP_WINDOWS", False); if (wmColormapWindows == None) { __glutWarning("Could not intern X atom for WM_COLORMAP_WINDOWS."); return; } XDeleteProperty(__glutDisplay, window->win, wmColormapWindows); } else { status = XSetWMColormapWindows(__glutDisplay, window->win, winlist, num); /* XSetWMColormapWindows should always work unless the WM_COLORMAP_WINDOWS property cannot be intern'ed. We check to be safe. */ if (status == False) __glutFatalError("XSetWMColormapWindows returned False"); } /* For portability reasons we don't use alloca for winlist and cmaplist, but we could. */ free(winlist); free(cmaplist); } GLUTwindow * __glutToplevelOf(GLUTwindow * window) { while (window->parent) { window = window->parent; } return window; } int glutCreateWindow(char *title) { static int firstWindow = 1; GLUTwindow *window; XWMHints *wmHints; Window win; XTextProperty textprop; window = __glutCreateWindow(NULL, __glutSizeHints.x, __glutSizeHints.y, __glutInitWidth, __glutInitHeight); win = window->win; /* setup ICCCM properties */ textprop.value = (unsigned char *) title; textprop.encoding = XA_STRING; textprop.format = 8; textprop.nitems = strlen(title); wmHints = XAllocWMHints(); wmHints->initial_state = __glutIconic ? IconicState : NormalState; wmHints->flags = StateHint; XSetWMProperties(__glutDisplay, win, &textprop, &textprop, /* only put WM_COMMAND property on first window */ firstWindow ? __glutArgv : NULL, firstWindow ? __glutArgc : 0, &__glutSizeHints, wmHints, NULL); firstWindow = 0; XFree(wmHints); XSetWMProtocols(__glutDisplay, win, &__glutWMDeleteWindow, 1); return window->num + 1; } int glutCreateSubWindow(int win, int x, int y, int width, int height) { GLUTwindow *window, *toplevel; window = __glutCreateWindow(__glutWindowList[win - 1], x, y, width, height); toplevel = __glutToplevelOf(window); if (toplevel->cmap != window->cmap) { __glutPutOnWorkList(toplevel, GLUT_COLORMAP_WORK); } return window->num + 1; } static void destroyWindow(GLUTwindow * window, GLUTwindow * initialWindow) { GLUTwindow **prev, *cur, *parent, *siblings; /* Recursively destroy any children. */ cur = window->children; while (cur) { siblings = cur->siblings; destroyWindow(cur, initialWindow); cur = siblings; } /* Remove from parent's children list (only necessary for non-initial windows and subwindows!). */ parent = window->parent; if (parent && parent == initialWindow->parent) { prev = &parent->children; cur = parent->children; while (cur) { if (cur == window) { *prev = cur->siblings; break; } prev = &(cur->siblings); cur = cur->siblings; } } /* Unbind if bound to this window. */ if (window == __glutCurrentWindow) { glXMakeCurrent(__glutDisplay, None, NULL); __glutCurrentWindow = NULL; } /* Begin tearing down window itself. */ if (window->overlay) { __glutFreeOverlayFunc(window->overlay); } XDestroyWindow(__glutDisplay, window->win); glXDestroyContext(__glutDisplay, window->ctx); if (window->colormap) { /* Only color index windows have colormap data structure. */ __glutFreeColormap(window->colormap); } /* NULLing the __glutWindowList helps detect is a window instance has been destroyed, given a window number. */ __glutWindowList[window->num] = NULL; /* Cleanup data structures that might contain window. */ cleanWindowWorkList(window); cleanStaleWindowList(window); /* Remove window from the "get window cache" if it is there. */ if (__glutWindowCache == window) __glutWindowCache = NULL; XFree(window->vis); free(window); } void glutDestroyWindow(int win) { GLUTwindow *window = __glutWindowList[win - 1]; if (__glutMappedMenu && __glutMenuWindow == window) { __glutFatalUsage("destroying menu window not allowed while menus in use"); } /* if not a toplevel window... */ if (window->parent) { /* destroying subwindows may change colormap requirements; recalculate toplevel window's WM_COLORMAP_WINDOWS property */ __glutPutOnWorkList(__glutToplevelOf(window->parent), GLUT_COLORMAP_WORK); } destroyWindow(window, window); } void glutSwapBuffers(void) { GLUTwindow *window = __glutCurrentWindow; if (window->renderWin == window->win) { if (__glutCurrentWindow->fakeSingle) { /* Pretend the double buffered window is single buffered, so treat glutSwapBuffers as a no-op */ return; } } else { if (__glutCurrentWindow->overlay->fakeSingle) { /* Pretend the double buffered overlay is single buffered, so treat glutSwapBuffers as a no-op. */ return; } } glXSwapBuffers(__glutDisplay, __glutCurrentWindow->renderWin); } void __glutChangeWindowEventMask(long eventMask, Bool add) { if (add) { /* add eventMask to window's event mask */ if ((__glutCurrentWindow->eventMask & eventMask) != eventMask) { __glutCurrentWindow->eventMask |= eventMask; __glutPutOnWorkList(__glutCurrentWindow, GLUT_EVENT_MASK_WORK); } } else { /* remove eventMask from window's event mask */ if (__glutCurrentWindow->eventMask & eventMask) { __glutCurrentWindow->eventMask &= ~eventMask; __glutPutOnWorkList(__glutCurrentWindow, GLUT_EVENT_MASK_WORK); } } } void glutDisplayFunc(GLUTdisplayCB displayFunc) { /* XXX Remove the warning after GLUT 3.0. */ if (!displayFunc) __glutFatalError("NULL display callback not allowed in GLUT 3.0; update your code."); __glutCurrentWindow->display = displayFunc; } void glutKeyboardFunc(GLUTkeyboardCB keyboardFunc) { __glutChangeWindowEventMask(KeyPressMask, keyboardFunc != NULL || __glutCurrentWindow->special != NULL); __glutCurrentWindow->keyboard = keyboardFunc; } void glutSpecialFunc(GLUTspecialCB specialFunc) { __glutChangeWindowEventMask(KeyPressMask, specialFunc != NULL || __glutCurrentWindow->keyboard != NULL); __glutCurrentWindow->special = specialFunc; } void glutMouseFunc(GLUTmouseCB mouseFunc) { if (__glutCurrentWindow->mouse) { if (!mouseFunc) { /* previous mouseFunc being disabled */ __glutCurrentWindow->buttonUses--; __glutChangeWindowEventMask( ButtonPressMask | ButtonReleaseMask, __glutCurrentWindow->buttonUses > 0); } } else { if (mouseFunc) { /* previously no mouseFunc, new one being installed */ __glutCurrentWindow->buttonUses++; __glutChangeWindowEventMask( ButtonPressMask | ButtonReleaseMask, True); } } __glutCurrentWindow->mouse = mouseFunc; } void glutMotionFunc(GLUTmotionCB motionFunc) { /* Hack. Some window managers (4Dwm by default) will mask motion events if the client is not selecting for button press and release events. So we select for press and release events too (being careful to use reference counting). */ if (__glutCurrentWindow->motion) { if (!motionFunc) { /* previous mouseFunc being disabled */ __glutCurrentWindow->buttonUses--; __glutChangeWindowEventMask( ButtonPressMask | ButtonReleaseMask, __glutCurrentWindow->buttonUses > 0); } } else { if (motionFunc) { /* previously no mouseFunc, new one being installed */ __glutCurrentWindow->buttonUses++; __glutChangeWindowEventMask( ButtonPressMask | ButtonReleaseMask, True); } } /* Real work of selecting for passive mouse motion. */ __glutChangeWindowEventMask( Button1MotionMask | Button2MotionMask | Button3MotionMask, motionFunc != NULL); __glutCurrentWindow->motion = motionFunc; } void glutPassiveMotionFunc(GLUTpassiveCB passiveMotionFunc) { __glutChangeWindowEventMask(PointerMotionMask, passiveMotionFunc != NULL); /* Passive motion also requires watching enters and leaves so that a fake passive motion event can be generated on an enter. */ __glutChangeWindowEventMask(EnterWindowMask | LeaveWindowMask, __glutCurrentWindow->entry != NULL || passiveMotionFunc != NULL); __glutCurrentWindow->passive = passiveMotionFunc; } void glutEntryFunc(GLUTentryCB entryFunc) { __glutChangeWindowEventMask(EnterWindowMask | LeaveWindowMask, entryFunc != NULL || __glutCurrentWindow->passive); __glutCurrentWindow->entry = entryFunc; if (!entryFunc) { __glutCurrentWindow->entryState = -1; } } void glutVisibilityFunc(GLUTvisibilityCB visibilityFunc) { __glutChangeWindowEventMask(VisibilityChangeMask, visibilityFunc != NULL); __glutCurrentWindow->visibility = visibilityFunc; if (!visibilityFunc) { /* make state invalid */ __glutCurrentWindow->visState = -1; } } void glutReshapeFunc(GLUTreshapeCB reshapeFunc) { if (reshapeFunc) { __glutCurrentWindow->reshape = reshapeFunc; } else { __glutCurrentWindow->reshape = __glutDefaultReshape; } }