diff options
Diffstat (limited to 'src/glut_compatibility.cxx')
| -rw-r--r-- | src/glut_compatibility.cxx | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/src/glut_compatibility.cxx b/src/glut_compatibility.cxx index adcac1b7a..df25c456b 100644 --- a/src/glut_compatibility.cxx +++ b/src/glut_compatibility.cxx @@ -1,7 +1,7 @@ // // GLUT emulation routines for the Fast Light Tool Kit (FLTK). // -// Copyright 1998-2016 by Bill Spitzak and others. +// Copyright 1998-2023 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this @@ -14,11 +14,11 @@ // https://www.fltk.org/bugs.php // -// Emulation of Glut using fltk. +// Emulation of Glut using FLTK. // GLUT is Copyright (c) Mark J. Kilgard, 1994, 1995, 1996. -// "This program is freely distributable without licensing fees and is -// provided without guarantee or warrantee expressed or implied. This +// "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." // Although I have copied the GLUT API, none of my code is based on @@ -35,6 +35,7 @@ static Fl_Glut_Window *windows[MAXWINDOWS+1]; static void (*glut_idle_func)() = 0; // global glut idle function +// The current GLUT window, may be NULL. See also STR #3458. Fl_Glut_Window *glut_window; int glut_menu; void (*glut_menustate_function)(int); @@ -61,7 +62,8 @@ void Fl_Glut_Window::draw() { } void glutSwapBuffers() { - if (!indraw) glut_window->swap_buffers(); + if (!indraw && glut_window) + glut_window->swap_buffers(); } void Fl_Glut_Window::draw_overlay() { @@ -389,12 +391,12 @@ void glutRemoveMenuItem(int item) { int glutGet(GLenum type) { switch (type) { case GLUT_RETURN_ZERO: return 0; - case GLUT_WINDOW_X: return glut_window->x(); - case GLUT_WINDOW_Y: return glut_window->y(); - case GLUT_WINDOW_WIDTH: return glut_window->pixel_w(); - case GLUT_WINDOW_HEIGHT: return glut_window->pixel_h(); + case GLUT_WINDOW_X: return glut_window ? glut_window->x() : 0; + case GLUT_WINDOW_Y: return glut_window ? glut_window->y() : 0; + case GLUT_WINDOW_WIDTH: return glut_window ? glut_window->pixel_w() : 0; + case GLUT_WINDOW_HEIGHT: return glut_window ? glut_window->pixel_h() : 0; case GLUT_WINDOW_PARENT: - if (glut_window->parent()) + if (glut_window && glut_window->parent()) return ((Fl_Glut_Window *)(glut_window->parent()))->number; else return 0; @@ -432,11 +434,11 @@ int glutGet(GLenum type) { int glutLayerGet(GLenum type) { switch (type) { - case GLUT_OVERLAY_POSSIBLE: return glut_window->can_do_overlay(); + case GLUT_OVERLAY_POSSIBLE: return glut_window ? glut_window->can_do_overlay() : 0; //case GLUT_LAYER_IN_USE: //case GLUT_HAS_OVERLAY: case GLUT_TRANSPARENT_INDEX: return 0; // true for SGI - case GLUT_NORMAL_DAMAGED: return glut_window->damage(); + case GLUT_NORMAL_DAMAGED: return glut_window ? glut_window->damage() : 0; case GLUT_OVERLAY_DAMAGED: return 1; // kind of works... default: return 0; } |