--- /dev/null
+/*
+MiniGLUT - minimal GLUT subset without dependencies
+Copyright (C) 2020-2022 John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#if defined(unix) || defined(__unix__)
+
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/cursorfont.h>
+#include <GL/glx.h>
+#define BUILD_X11
+
+#ifndef GLX_SAMPLE_BUFFERS_ARB
+#define GLX_SAMPLE_BUFFERS_ARB 100000
+#define GLX_SAMPLES_ARB 100001
+#endif
+#ifndef GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB
+#define GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20b2
+#endif
+
+static Display *dpy;
+static Window win, root;
+static Colormap cmap;
+static int cmap_size;
+static int scr;
+static GLXContext ctx;
+static Atom xa_wm_proto, xa_wm_del_win;
+static Atom xa_net_wm_state, xa_net_wm_state_fullscr;
+static Atom xa_motif_wm_hints;
+static Atom xa_motion_event, xa_button_press_event, xa_button_release_event, xa_command_event;
+static unsigned int evmask;
+static Cursor blank_cursor;
+
+static int have_netwm_fullscr(void);
+
+#elif defined(_WIN32)
+
+#include <windows.h>
+#define BUILD_WIN32
+
+static LRESULT CALLBACK handle_message(HWND win, unsigned int msg, WPARAM wparam, LPARAM lparam);
+
+static HINSTANCE hinst;
+static HWND win;
+static HDC dc;
+static HGLRC ctx;
+static HPALETTE cmap;
+static int cmap_size;
+
+#else
+#error unsupported platform
+#endif
+#include <GL/gl.h>
+#include "miniglut.h"
+
+#ifdef _MSC_VER
+#pragma warning (disable: 4244 4305)
+#endif
+
+
+struct ctx_info {
+ int rsize, gsize, bsize, asize;
+ int zsize, ssize;
+ int dblbuf;
+ int samples;
+ int stereo;
+ int srgb;
+};
+
+static void cleanup(void);
+static void create_window(const char *title);
+static void get_window_pos(int *x, int *y);
+static void get_window_size(int *w, int *h);
+static void get_screen_size(int *scrw, int *scrh);
+
+static long get_msec(void);
+static void panic(const char *msg);
+static void sys_exit(int status);
+static int sys_write(int fd, const void *buf, int count);
+
+
+static int init_x = -1, init_y, init_width = 256, init_height = 256;
+static unsigned int init_mode;
+
+static struct ctx_info ctx_info;
+static int cur_cursor = GLUT_CURSOR_INHERIT;
+static int ignore_key_repeat;
+
+static glut_cb cb_display;
+static glut_cb cb_idle;
+static glut_cb_reshape cb_reshape;
+static glut_cb_state cb_vis, cb_entry;
+static glut_cb_keyb cb_keydown, cb_keyup;
+static glut_cb_special cb_skeydown, cb_skeyup;
+static glut_cb_mouse cb_mouse;
+static glut_cb_motion cb_motion, cb_passive;
+static glut_cb_sbmotion cb_sball_motion, cb_sball_rotate;
+static glut_cb_sbbutton cb_sball_button;
+
+static int fullscreen;
+static int prev_win_x, prev_win_y, prev_win_width, prev_win_height;
+
+static int win_width, win_height;
+static int mapped;
+static int quit;
+static int upd_pending;
+static int modstate;
+
+void glutInit(int *argc, char **argv)
+{
+#ifdef BUILD_X11
+ Pixmap blankpix = 0;
+ XColor xcol;
+
+ if(!(dpy = XOpenDisplay(0))) {
+ panic("Failed to connect to the X server\n");
+ }
+ scr = DefaultScreen(dpy);
+ root = RootWindow(dpy, scr);
+ xa_wm_proto = XInternAtom(dpy, "WM_PROTOCOLS", False);
+ xa_wm_del_win = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+ xa_motif_wm_hints = XInternAtom(dpy, "_MOTIF_WM_HINTS", False);
+ xa_net_wm_state_fullscr = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
+ if(have_netwm_fullscr()) {
+ xa_net_wm_state = XInternAtom(dpy, "_NET_WM_STATE", False);
+ }
+
+ xa_motion_event = XInternAtom(dpy, "MotionEvent", True);
+ xa_button_press_event = XInternAtom(dpy, "ButtonPressEvent", True);
+ xa_button_release_event = XInternAtom(dpy, "ButtonReleaseEvent", True);
+ xa_command_event = XInternAtom(dpy, "CommandEvent", True);
+
+ evmask = ExposureMask | StructureNotifyMask;
+
+ if((blankpix = XCreateBitmapFromData(dpy, root, (char*)&blankpix, 1, 1))) {
+ blank_cursor = XCreatePixmapCursor(dpy, blankpix, blankpix, &xcol, &xcol, 0, 0);
+ XFreePixmap(dpy, blankpix);
+ }
+
+#endif
+#ifdef BUILD_WIN32
+ WNDCLASSEX wc = {0};
+
+ hinst = GetModuleHandle(0);
+
+ wc.cbSize = sizeof wc;
+ wc.hbrBackground = GetStockObject(BLACK_BRUSH);
+ wc.hCursor = LoadCursor(0, IDC_ARROW);
+ wc.hIcon = wc.hIconSm = LoadIcon(0, IDI_APPLICATION);
+ wc.hInstance = hinst;
+ wc.lpfnWndProc = handle_message;
+ wc.lpszClassName = "MiniGLUT";
+ wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+ if(!RegisterClassEx(&wc)) {
+ panic("Failed to register \"MiniGLUT\" window class\n");
+ }
+
+ if(init_x == -1) {
+ get_screen_size(&init_x, &init_y);
+ init_x >>= 3;
+ init_y >>= 3;
+ }
+#endif
+}
+
+void glutInitWindowPosition(int x, int y)
+{
+ init_x = x;
+ init_y = y;
+}
+
+void glutInitWindowSize(int xsz, int ysz)
+{
+ init_width = xsz;
+ init_height = ysz;
+}
+
+void glutInitDisplayMode(unsigned int mode)
+{
+ init_mode = mode;
+}
+
+void glutCreateWindow(const char *title)
+{
+ create_window(title);
+}
+
+void glutExit(void)
+{
+ quit = 1;
+}
+
+void glutMainLoop(void)
+{
+ while(!quit) {
+ glutMainLoopEvent();
+ }
+}
+
+void glutPostRedisplay(void)
+{
+ upd_pending = 1;
+}
+
+void glutIgnoreKeyRepeat(int ignore)
+{
+ ignore_key_repeat = ignore;
+}
+
+#define UPD_EVMASK(x) \
+ do { \
+ if(func) { \
+ evmask |= x; \
+ } else { \
+ evmask &= ~(x); \
+ } \
+ if(win) XSelectInput(dpy, win, evmask); \
+ } while(0)
+
+
+void glutIdleFunc(glut_cb func)
+{
+ cb_idle = func;
+}
+
+void glutDisplayFunc(glut_cb func)
+{
+ cb_display = func;
+}
+
+void glutReshapeFunc(glut_cb_reshape func)
+{
+ cb_reshape = func;
+}
+
+void glutVisibilityFunc(glut_cb_state func)
+{
+ cb_vis = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(VisibilityChangeMask);
+#endif
+}
+
+void glutEntryFunc(glut_cb_state func)
+{
+ cb_entry = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(EnterWindowMask | LeaveWindowMask);
+#endif
+}
+
+void glutKeyboardFunc(glut_cb_keyb func)
+{
+ cb_keydown = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(KeyPressMask);
+#endif
+}
+
+void glutKeyboardUpFunc(glut_cb_keyb func)
+{
+ cb_keyup = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(KeyReleaseMask);
+#endif
+}
+
+void glutSpecialFunc(glut_cb_special func)
+{
+ cb_skeydown = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(KeyPressMask);
+#endif
+}
+
+void glutSpecialUpFunc(glut_cb_special func)
+{
+ cb_skeyup = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(KeyReleaseMask);
+#endif
+}
+
+void glutMouseFunc(glut_cb_mouse func)
+{
+ cb_mouse = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(ButtonPressMask | ButtonReleaseMask);
+#endif
+}
+
+void glutMotionFunc(glut_cb_motion func)
+{
+ cb_motion = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(ButtonMotionMask);
+#endif
+}
+
+void glutPassiveMotionFunc(glut_cb_motion func)
+{
+ cb_passive = func;
+#ifdef BUILD_X11
+ UPD_EVMASK(PointerMotionMask);
+#endif
+}
+
+void glutSpaceballMotionFunc(glut_cb_sbmotion func)
+{
+ cb_sball_motion = func;
+}
+
+void glutSpaceballRotateFunc(glut_cb_sbmotion func)
+{
+ cb_sball_rotate = func;
+}
+
+void glutSpaceballButtonFunc(glut_cb_sbbutton func)
+{
+ cb_sball_button = func;
+}
+
+int glutGet(unsigned int s)
+{
+ int x, y;
+ switch(s) {
+ case GLUT_WINDOW_X:
+ get_window_pos(&x, &y);
+ return x;
+ case GLUT_WINDOW_Y:
+ get_window_pos(&x, &y);
+ return y;
+ case GLUT_WINDOW_WIDTH:
+ get_window_size(&x, &y);
+ return x;
+ case GLUT_WINDOW_HEIGHT:
+ get_window_size(&x, &y);
+ return y;
+ case GLUT_WINDOW_BUFFER_SIZE:
+ return ctx_info.rsize + ctx_info.gsize + ctx_info.bsize + ctx_info.asize;
+ case GLUT_WINDOW_STENCIL_SIZE:
+ return ctx_info.ssize;
+ case GLUT_WINDOW_DEPTH_SIZE:
+ return ctx_info.zsize;
+ case GLUT_WINDOW_RED_SIZE:
+ return ctx_info.rsize;
+ case GLUT_WINDOW_GREEN_SIZE:
+ return ctx_info.gsize;
+ case GLUT_WINDOW_BLUE_SIZE:
+ return ctx_info.bsize;
+ case GLUT_WINDOW_ALPHA_SIZE:
+ return ctx_info.asize;
+ case GLUT_WINDOW_DOUBLEBUFFER:
+ return ctx_info.dblbuf;
+ case GLUT_WINDOW_RGBA:
+ return 1;
+ case GLUT_WINDOW_NUM_SAMPLES:
+ return ctx_info.samples;
+ case GLUT_WINDOW_STEREO:
+ return ctx_info.stereo;
+ case GLUT_WINDOW_SRGB:
+ return ctx_info.srgb;
+ case GLUT_WINDOW_CURSOR:
+ return cur_cursor;
+ case GLUT_WINDOW_COLORMAP_SIZE:
+ return cmap_size;
+ case GLUT_SCREEN_WIDTH:
+ get_screen_size(&x, &y);
+ return x;
+ case GLUT_SCREEN_HEIGHT:
+ get_screen_size(&x, &y);
+ return y;
+ case GLUT_INIT_DISPLAY_MODE:
+ return init_mode;
+ case GLUT_INIT_WINDOW_X:
+ return init_x;
+ case GLUT_INIT_WINDOW_Y:
+ return init_y;
+ case GLUT_INIT_WINDOW_WIDTH:
+ return init_width;
+ case GLUT_INIT_WINDOW_HEIGHT:
+ return init_height;
+ case GLUT_ELAPSED_TIME:
+ return get_msec();
+ default:
+ break;
+ }
+ return 0;
+}
+
+int glutGetModifiers(void)
+{
+ return modstate;
+}
+
+static int is_space(int c)
+{
+ return c == ' ' || c == '\t' || c == '\v' || c == '\n' || c == '\r';
+}
+
+static const char *skip_space(const char *s)
+{
+ while(*s && is_space(*s)) s++;
+ return s;
+}
+
+int glutExtensionSupported(char *ext)
+{
+ const char *str, *eptr;
+
+ if(!(str = (const char*)glGetString(GL_EXTENSIONS))) {
+ return 0;
+ }
+
+ while(*str) {
+ str = skip_space(str);
+ eptr = skip_space(ext);
+ while(*str && !is_space(*str) && *eptr && *str == *eptr) {
+ str++;
+ eptr++;
+ }
+ if((!*str || is_space(*str)) && !*eptr) {
+ return 1;
+ }
+ while(*str && !is_space(*str)) str++;
+ }
+
+ return 0;
+}
+
+
+/* --------------- UNIX/X11 implementation ----------------- */
+#ifdef BUILD_X11
+enum {
+ SPNAV_EVENT_ANY, /* used by spnav_remove_events() */
+ SPNAV_EVENT_MOTION,
+ SPNAV_EVENT_BUTTON /* includes both press and release */
+};
+
+struct spnav_event_motion {
+ int type;
+ int x, y, z;
+ int rx, ry, rz;
+ unsigned int period;
+ int *data;
+};
+
+struct spnav_event_button {
+ int type;
+ int press;
+ int bnum;
+};
+
+union spnav_event {
+ int type;
+ struct spnav_event_motion motion;
+ struct spnav_event_button button;
+};
+
+
+static void handle_event(XEvent *ev);
+
+static int spnav_window(Window win);
+static int spnav_event(const XEvent *xev, union spnav_event *event);
+static int spnav_remove_events(int type);
+
+
+void glutMainLoopEvent(void)
+{
+ XEvent ev;
+
+ if(!cb_display) {
+ panic("display callback not set");
+ }
+
+ if(!upd_pending && !cb_idle) {
+ XNextEvent(dpy, &ev);
+ handle_event(&ev);
+ if(quit) goto end;
+ }
+ while(XPending(dpy)) {
+ XNextEvent(dpy, &ev);
+ handle_event(&ev);
+ if(quit) goto end;
+ }
+
+ if(cb_idle) {
+ cb_idle();
+ }
+
+ if(upd_pending && mapped) {
+ upd_pending = 0;
+ cb_display();
+ }
+
+end:
+ if(quit) {
+ cleanup();
+ }
+}
+
+static void cleanup(void)
+{
+ if(win) {
+ spnav_window(root);
+ glXMakeCurrent(dpy, 0, 0);
+ XDestroyWindow(dpy, win);
+ }
+}
+
+static KeySym translate_keysym(KeySym sym)
+{
+ switch(sym) {
+ case XK_Escape:
+ return 27;
+ case XK_BackSpace:
+ return '\b';
+ case XK_Linefeed:
+ return '\r';
+ case XK_Return:
+ return '\n';
+ case XK_Delete:
+ return 127;
+ case XK_Tab:
+ return '\t';
+ default:
+ break;
+ }
+ return sym;
+}
+
+static void handle_event(XEvent *ev)
+{
+ KeySym sym;
+ union spnav_event sev;
+
+ switch(ev->type) {
+ case MapNotify:
+ mapped = 1;
+ break;
+ case UnmapNotify:
+ mapped = 0;
+ break;
+ case ConfigureNotify:
+ if(cb_reshape && (ev->xconfigure.width != win_width || ev->xconfigure.height != win_height)) {
+ win_width = ev->xconfigure.width;
+ win_height = ev->xconfigure.height;
+ cb_reshape(ev->xconfigure.width, ev->xconfigure.height);
+ }
+ break;
+
+ case ClientMessage:
+ if(ev->xclient.message_type == xa_wm_proto) {
+ if(ev->xclient.data.l[0] == xa_wm_del_win) {
+ quit = 1;
+ }
+ }
+ if(spnav_event(ev, &sev)) {
+ switch(sev.type) {
+ case SPNAV_EVENT_MOTION:
+ if(cb_sball_motion) {
+ cb_sball_motion(sev.motion.x, sev.motion.y, sev.motion.z);
+ }
+ if(cb_sball_rotate) {
+ cb_sball_rotate(sev.motion.rx, sev.motion.ry, sev.motion.rz);
+ }
+ spnav_remove_events(SPNAV_EVENT_MOTION);
+ break;
+
+ case SPNAV_EVENT_BUTTON:
+ if(cb_sball_button) {
+ cb_sball_button(sev.button.bnum + 1, sev.button.press ? GLUT_DOWN : GLUT_UP);
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ break;
+
+ case Expose:
+ upd_pending = 1;
+ break;
+
+ case KeyPress:
+ if(0) {
+ case KeyRelease:
+ if(ignore_key_repeat && XEventsQueued(dpy, QueuedAfterReading)) {
+ XEvent next;
+ XPeekEvent(dpy, &next);
+
+ if(next.type == KeyPress && next.xkey.keycode == ev->xkey.keycode &&
+ next.xkey.time == ev->xkey.time) {
+ /* this is a key-repeat event, ignore the release and consume
+ * the following press
+ */
+ XNextEvent(dpy, &next);
+ break;
+ }
+ }
+ }
+ modstate = ev->xkey.state & (ShiftMask | ControlMask | Mod1Mask);
+ if(!(sym = XLookupKeysym(&ev->xkey, 0))) {
+ break;
+ }
+ sym = translate_keysym(sym);
+ if(sym < 256) {
+ if(ev->type == KeyPress) {
+ if(cb_keydown) cb_keydown((unsigned char)sym, ev->xkey.x, ev->xkey.y);
+ } else {
+ if(cb_keyup) cb_keyup((unsigned char)sym, ev->xkey.x, ev->xkey.y);
+ }
+ } else {
+ if(ev->type == KeyPress) {
+ if(cb_skeydown) cb_skeydown(sym, ev->xkey.x, ev->xkey.y);
+ } else {
+ if(cb_skeyup) cb_skeyup(sym, ev->xkey.x, ev->xkey.y);
+ }
+ }
+ break;
+
+ case ButtonPress:
+ case ButtonRelease:
+ modstate = ev->xbutton.state & (ShiftMask | ControlMask | Mod1Mask);
+ if(cb_mouse) {
+ int bn = ev->xbutton.button - Button1;
+ cb_mouse(bn, ev->type == ButtonPress ? GLUT_DOWN : GLUT_UP,
+ ev->xbutton.x, ev->xbutton.y);
+ }
+ break;
+
+ case MotionNotify:
+ if(ev->xmotion.state & (Button1Mask | Button2Mask | Button3Mask | Button4Mask | Button5Mask)) {
+ if(cb_motion) cb_motion(ev->xmotion.x, ev->xmotion.y);
+ } else {
+ if(cb_passive) cb_passive(ev->xmotion.x, ev->xmotion.y);
+ }
+ break;
+
+ case VisibilityNotify:
+ if(cb_vis) {
+ cb_vis(ev->xvisibility.state == VisibilityFullyObscured ? GLUT_NOT_VISIBLE : GLUT_VISIBLE);
+ }
+ break;
+ case EnterNotify:
+ if(cb_entry) cb_entry(GLUT_ENTERED);
+ break;
+ case LeaveNotify:
+ if(cb_entry) cb_entry(GLUT_LEFT);
+ break;
+ }
+}
+
+void glutSwapBuffers(void)
+{
+ glXSwapBuffers(dpy, win);
+}
+
+/* BUG:
+ * set_fullscreen_mwm removes the decorations with MotifWM hints, and then it
+ * needs to resize the window to make it fullscreen. The way it does this is by
+ * querying the size of the root window (see get_screen_size), which in the
+ * case of multi-monitor setups will be the combined size of all monitors.
+ * This is problematic; the way to solve it is to use the XRandR extension, or
+ * the Xinerama extension, to figure out the dimensions of the correct video
+ * output, which would add potentially two extension support libraries to our
+ * dependencies list.
+ * Moreover, any X installation modern enough to support XR&R will almost
+ * certainly be running a window manager supporting the EHWM
+ * _NET_WM_STATE_FULLSCREEN method (set_fullscreen_ewmh), which does not rely
+ * on manual resizing, and is used in preference if available, making this
+ * whole endeavor pointless.
+ * So I'll just leave it with set_fullscreen_mwm covering the entire
+ * multi-monitor area for now.
+ */
+
+struct mwm_hints {
+ unsigned long flags;
+ unsigned long functions;
+ unsigned long decorations;
+ long input_mode;
+ unsigned long status;
+};
+
+#define MWM_HINTS_DECORATIONS 2
+#define MWM_DECOR_ALL 1
+
+static void set_fullscreen_mwm(int fs)
+{
+ struct mwm_hints hints;
+ int scr_width, scr_height;
+
+ if(fs) {
+ get_window_pos(&prev_win_x, &prev_win_y);
+ get_window_size(&prev_win_width, &prev_win_height);
+ get_screen_size(&scr_width, &scr_height);
+
+ hints.decorations = 0;
+ hints.flags = MWM_HINTS_DECORATIONS;
+ XChangeProperty(dpy, win, xa_motif_wm_hints, xa_motif_wm_hints, 32,
+ PropModeReplace, (unsigned char*)&hints, 5);
+
+ XMoveResizeWindow(dpy, win, 0, 0, scr_width, scr_height);
+ } else {
+ XDeleteProperty(dpy, win, xa_motif_wm_hints);
+ XMoveResizeWindow(dpy, win, prev_win_x, prev_win_y, prev_win_width, prev_win_height);
+ }
+}
+
+static int have_netwm_fullscr(void)
+{
+ int fmt;
+ long offs = 0;
+ unsigned long i, count, rem;
+ Atom *prop, type;
+ Atom xa_net_supported = XInternAtom(dpy, "_NET_SUPPORTED", False);
+
+ do {
+ XGetWindowProperty(dpy, root, xa_net_supported, offs, 8, False, AnyPropertyType,
+ &type, &fmt, &count, &rem, (unsigned char**)&prop);
+
+ for(i=0; i<count; i++) {
+ if(prop[i] == xa_net_wm_state_fullscr) {
+ XFree(prop);
+ return 1;
+ }
+ }
+ XFree(prop);
+ offs += count;
+ } while(rem > 0);
+
+ return 0;
+}
+
+static void set_fullscreen_ewmh(int fs)
+{
+ XClientMessageEvent msg = {0};
+
+ msg.type = ClientMessage;
+ msg.window = win;
+ msg.message_type = xa_net_wm_state; /* _NET_WM_STATE */
+ msg.format = 32;
+ msg.data.l[0] = fs ? 1 : 0;
+ msg.data.l[1] = xa_net_wm_state_fullscr; /* _NET_WM_STATE_FULLSCREEN */
+ msg.data.l[2] = 0;
+ msg.data.l[3] = 1; /* source regular application */
+ XSendEvent(dpy, root, False, SubstructureNotifyMask | SubstructureRedirectMask, (XEvent*)&msg);
+}
+
+static void set_fullscreen(int fs)
+{
+ if(fullscreen == fs) return;
+
+ if(xa_net_wm_state && xa_net_wm_state_fullscr) {
+ set_fullscreen_ewmh(fs);
+ fullscreen = fs;
+ } else if(xa_motif_wm_hints) {
+ set_fullscreen_mwm(fs);
+ fullscreen = fs;
+ }
+}
+
+void glutPositionWindow(int x, int y)
+{
+ set_fullscreen(0);
+ XMoveWindow(dpy, win, x, y);
+}
+
+void glutReshapeWindow(int xsz, int ysz)
+{
+ set_fullscreen(0);
+ XResizeWindow(dpy, win, xsz, ysz);
+}
+
+void glutFullScreen(void)
+{
+ set_fullscreen(1);
+}
+
+void glutSetWindowTitle(const char *title)
+{
+ XTextProperty tprop;
+ if(!XStringListToTextProperty((char**)&title, 1, &tprop)) {
+ return;
+ }
+ XSetWMName(dpy, win, &tprop);
+ XFree(tprop.value);
+}
+
+void glutSetIconTitle(const char *title)
+{
+ XTextProperty tprop;
+ if(!XStringListToTextProperty((char**)&title, 1, &tprop)) {
+ return;
+ }
+ XSetWMIconName(dpy, win, &tprop);
+ XFree(tprop.value);
+}
+
+void glutSetCursor(int cidx)
+{
+ Cursor cur = None;
+
+ switch(cidx) {
+ case GLUT_CURSOR_LEFT_ARROW:
+ cur = XCreateFontCursor(dpy, XC_left_ptr);
+ break;
+ case GLUT_CURSOR_INHERIT:
+ break;
+ case GLUT_CURSOR_NONE:
+ cur = blank_cursor;
+ break;
+ default:
+ return;
+ }
+
+ XDefineCursor(dpy, win, cur);
+ cur_cursor = cidx;
+}
+
+void glutSetColor(int idx, float r, float g, float b)
+{
+ XColor color;
+
+ if(idx >= 0 && idx < cmap_size) {
+ color.pixel = idx;
+ color.red = (unsigned short)(r * 65535.0f);
+ color.green = (unsigned short)(g * 65535.0f);
+ color.blue = (unsigned short)(b * 65535.0f);
+ color.flags = DoRed | DoGreen | DoBlue;
+ XStoreColor(dpy, cmap, &color);
+ }
+}
+
+float glutGetColor(int idx, int comp)
+{
+ XColor color;
+
+ if(idx < 0 || idx >= cmap_size) {
+ return -1.0f;
+ }
+
+ color.pixel = idx;
+ XQueryColor(dpy, cmap, &color);
+ switch(comp) {
+ case GLUT_RED:
+ return color.red / 65535.0f;
+ case GLUT_GREEN:
+ return color.green / 65535.0f;
+ case GLUT_BLUE:
+ return color.blue / 65535.0f;
+ default:
+ break;
+ }
+ return -1.0f;
+}
+
+void glutSetKeyRepeat(int repmode)
+{
+ if(repmode) {
+ XAutoRepeatOn(dpy);
+ } else {
+ XAutoRepeatOff(dpy);
+ }
+}
+
+static XVisualInfo *choose_visual(unsigned int mode)
+{
+ XVisualInfo *vi;
+ int attr[32];
+ int *aptr = attr;
+ int *samples = 0;
+
+ if(mode & GLUT_DOUBLE) {
+ *aptr++ = GLX_DOUBLEBUFFER;
+ }
+
+ if(mode & GLUT_INDEX) {
+ *aptr++ = GLX_BUFFER_SIZE;
+ *aptr++ = 1;
+ } else {
+ *aptr++ = GLX_RGBA;
+ *aptr++ = GLX_RED_SIZE; *aptr++ = 1;
+ *aptr++ = GLX_GREEN_SIZE; *aptr++ = 1;
+ *aptr++ = GLX_BLUE_SIZE; *aptr++ = 1;
+ }
+ if(mode & GLUT_ALPHA) {
+ *aptr++ = GLX_ALPHA_SIZE;
+ *aptr++ = 4;
+ }
+ if(mode & GLUT_DEPTH) {
+ *aptr++ = GLX_DEPTH_SIZE;
+ *aptr++ = 8;
+ }
+ if(mode & GLUT_STENCIL) {
+ *aptr++ = GLX_STENCIL_SIZE;
+ *aptr++ = 1;
+ }
+ if(mode & GLUT_ACCUM) {
+ *aptr++ = GLX_ACCUM_RED_SIZE; *aptr++ = 1;
+ *aptr++ = GLX_ACCUM_GREEN_SIZE; *aptr++ = 1;
+ *aptr++ = GLX_ACCUM_BLUE_SIZE; *aptr++ = 1;
+ }
+ if(mode & GLUT_STEREO) {
+ *aptr++ = GLX_STEREO;
+ }
+ if(mode & GLUT_SRGB) {
+ *aptr++ = GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB;
+ }
+ if(mode & GLUT_MULTISAMPLE) {
+ *aptr++ = GLX_SAMPLE_BUFFERS_ARB;
+ *aptr++ = 1;
+ *aptr++ = GLX_SAMPLES_ARB;
+ samples = aptr;
+ *aptr++ = 32;
+ }
+ *aptr++ = None;
+
+ if(!samples) {
+ return glXChooseVisual(dpy, scr, attr);
+ }
+ while(!(vi = glXChooseVisual(dpy, scr, attr)) && *samples) {
+ *samples >>= 1;
+ if(!*samples) {
+ aptr[-3] = None;
+ }
+ }
+ return vi;
+}
+
+static void create_window(const char *title)
+{
+ XSetWindowAttributes xattr = {0};
+ XVisualInfo *vi;
+ unsigned int xattr_mask;
+ unsigned int mode = init_mode;
+
+ if(!(vi = choose_visual(mode))) {
+ mode &= ~GLUT_SRGB;
+ if(!(vi = choose_visual(mode))) {
+ panic("Failed to find compatible visual\n");
+ }
+ }
+
+ if(!(ctx = glXCreateContext(dpy, vi, 0, True))) {
+ XFree(vi);
+ panic("Failed to create OpenGL context\n");
+ }
+
+ glXGetConfig(dpy, vi, GLX_RED_SIZE, &ctx_info.rsize);
+ glXGetConfig(dpy, vi, GLX_GREEN_SIZE, &ctx_info.gsize);
+ glXGetConfig(dpy, vi, GLX_BLUE_SIZE, &ctx_info.bsize);
+ glXGetConfig(dpy, vi, GLX_ALPHA_SIZE, &ctx_info.asize);
+ glXGetConfig(dpy, vi, GLX_DEPTH_SIZE, &ctx_info.zsize);
+ glXGetConfig(dpy, vi, GLX_STENCIL_SIZE, &ctx_info.ssize);
+ glXGetConfig(dpy, vi, GLX_DOUBLEBUFFER, &ctx_info.dblbuf);
+ glXGetConfig(dpy, vi, GLX_STEREO, &ctx_info.stereo);
+ glXGetConfig(dpy, vi, GLX_SAMPLES_ARB, &ctx_info.samples);
+ glXGetConfig(dpy, vi, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, &ctx_info.srgb);
+
+ if(!(cmap = XCreateColormap(dpy, root, vi->visual, mode & GLUT_INDEX ? AllocAll : AllocNone))) {
+ XFree(vi);
+ glXDestroyContext(dpy, ctx);
+ panic("Failed to create colormap\n");
+ }
+ cmap_size = GLUT_INDEX ? vi->colormap_size : 0;
+
+ xattr.background_pixel = BlackPixel(dpy, scr);
+ xattr.colormap = cmap;
+ xattr_mask = CWBackPixel | CWColormap | CWBackPixmap | CWBorderPixel;
+ if(!(win = XCreateWindow(dpy, root, init_x, init_y, init_width, init_height, 0,
+ vi->depth, InputOutput, vi->visual, xattr_mask, &xattr))) {
+ XFree(vi);
+ glXDestroyContext(dpy, ctx);
+ XFreeColormap(dpy, cmap);
+ panic("Failed to create window\n");
+ }
+ XFree(vi);
+
+ XSelectInput(dpy, win, evmask);
+
+ spnav_window(win);
+
+ glutSetWindowTitle(title);
+ glutSetIconTitle(title);
+ XSetWMProtocols(dpy, win, &xa_wm_del_win, 1);
+ XMapWindow(dpy, win);
+
+ glXMakeCurrent(dpy, win, ctx);
+}
+
+static void get_window_pos(int *x, int *y)
+{
+ Window child;
+ XTranslateCoordinates(dpy, win, root, 0, 0, x, y, &child);
+}
+
+static void get_window_size(int *w, int *h)
+{
+ XWindowAttributes wattr;
+ XGetWindowAttributes(dpy, win, &wattr);
+ *w = wattr.width;
+ *h = wattr.height;
+}
+
+static void get_screen_size(int *scrw, int *scrh)
+{
+ XWindowAttributes wattr;
+ XGetWindowAttributes(dpy, root, &wattr);
+ *scrw = wattr.width;
+ *scrh = wattr.height;
+}
+
+
+/* spaceball */
+enum {
+ CMD_APP_WINDOW = 27695,
+ CMD_APP_SENS
+};
+
+static Window get_daemon_window(Display *dpy);
+static int catch_badwin(Display *dpy, XErrorEvent *err);
+
+#define SPNAV_INITIALIZED (xa_motion_event)
+
+static int spnav_window(Window win)
+{
+ int (*prev_xerr_handler)(Display*, XErrorEvent*);
+ XEvent xev;
+ Window daemon_win;
+
+ if(!SPNAV_INITIALIZED) {
+ return -1;
+ }
+
+ if(!(daemon_win = get_daemon_window(dpy))) {
+ return -1;
+ }
+
+ prev_xerr_handler = XSetErrorHandler(catch_badwin);
+
+ xev.type = ClientMessage;
+ xev.xclient.send_event = False;
+ xev.xclient.display = dpy;
+ xev.xclient.window = win;
+ xev.xclient.message_type = xa_command_event;
+ xev.xclient.format = 16;
+ xev.xclient.data.s[0] = ((unsigned int)win & 0xffff0000) >> 16;
+ xev.xclient.data.s[1] = (unsigned int)win & 0xffff;
+ xev.xclient.data.s[2] = CMD_APP_WINDOW;
+
+ XSendEvent(dpy, daemon_win, False, 0, &xev);
+ XSync(dpy, False);
+
+ XSetErrorHandler(prev_xerr_handler);
+ return 0;
+}
+
+static Bool match_events(Display *dpy, XEvent *xev, char *arg)
+{
+ int evtype = *(int*)arg;
+
+ if(xev->type != ClientMessage) {
+ return False;
+ }
+
+ if(xev->xclient.message_type == xa_motion_event) {
+ return !evtype || evtype == SPNAV_EVENT_MOTION ? True : False;
+ }
+ if(xev->xclient.message_type == xa_button_press_event ||
+ xev->xclient.message_type == xa_button_release_event) {
+ return !evtype || evtype == SPNAV_EVENT_BUTTON ? True : False;
+ }
+ return False;
+}
+
+static int spnav_remove_events(int type)
+{
+ int rm_count = 0;
+ XEvent xev;
+ while(XCheckIfEvent(dpy, &xev, match_events, (char*)&type)) {
+ rm_count++;
+ }
+ return rm_count;
+}
+
+static int spnav_event(const XEvent *xev, union spnav_event *event)
+{
+ int i;
+ int xmsg_type;
+
+ xmsg_type = xev->xclient.message_type;
+
+ if(xmsg_type != xa_motion_event && xmsg_type != xa_button_press_event &&
+ xmsg_type != xa_button_release_event) {
+ return 0;
+ }
+
+ if(xmsg_type == xa_motion_event) {
+ event->type = SPNAV_EVENT_MOTION;
+ event->motion.data = &event->motion.x;
+
+ for(i=0; i<6; i++) {
+ event->motion.data[i] = xev->xclient.data.s[i + 2];
+ }
+ event->motion.period = xev->xclient.data.s[8];
+ } else {
+ event->type = SPNAV_EVENT_BUTTON;
+ event->button.press = xmsg_type == xa_button_press_event ? 1 : 0;
+ event->button.bnum = xev->xclient.data.s[2];
+ }
+ return event->type;
+}
+
+static int mglut_strcmp(const char *s1, const char *s2)
+{
+ while(*s1 && *s1 == *s2) {
+ s1++;
+ s2++;
+ }
+ return *s1 - *s2;
+}
+
+static Window get_daemon_window(Display *dpy)
+{
+ Window win;
+ XTextProperty wname;
+ Atom type;
+ int fmt;
+ unsigned long nitems, bytes_after;
+ unsigned char *prop;
+
+ XGetWindowProperty(dpy, root, xa_command_event, 0, 1, False, AnyPropertyType,
+ &type, &fmt, &nitems, &bytes_after, &prop);
+ if(!prop) {
+ return 0;
+ }
+
+ win = *(Window*)prop;
+ XFree(prop);
+
+ wname.value = 0;
+ if(!XGetWMName(dpy, win, &wname) || mglut_strcmp("Magellan Window", (char*)wname.value) != 0) {
+ win = 0;
+ }
+ XFree(wname.value);
+
+ return win;
+}
+
+static int catch_badwin(Display *dpy, XErrorEvent *err)
+{
+ return 0;
+}
+
+
+
+#endif /* BUILD_X11 */
+
+
+/* --------------- windows implementation ----------------- */
+#ifdef BUILD_WIN32
+static int reshape_pending;
+
+static void update_modkeys(void);
+static int translate_vkey(int vkey);
+static void handle_mbutton(int bn, int st, WPARAM wparam, LPARAM lparam);
+
+#ifdef MINIGLUT_WINMAIN
+int WINAPI WinMain(HINSTANCE hinst, HINSTANCE hprev, char *cmdline, int showcmd)
+{
+ int argc = 1;
+ char *argv[] = { "miniglut.exe", 0 };
+ return main(argc, argv);
+}
+#endif
+
+void glutMainLoopEvent(void)
+{
+ MSG msg;
+
+ if(!cb_display) {
+ panic("display callback not set");
+ }
+
+ if(reshape_pending && cb_reshape) {
+ reshape_pending = 0;
+ get_window_size(&win_width, &win_height);
+ cb_reshape(win_width, win_height);
+ }
+
+ if(!upd_pending && !cb_idle) {
+ GetMessage(&msg, 0, 0, 0);
+ TranslateMessage(&msg);
+ DispatchMessage(&msg);
+ if(quit) return;
+ }
+ while(PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) {
+ TranslateMessage(&msg);
+ DispatchMessage(&msg);
+ if(quit) return;
+ }
+
+ if(cb_idle) {
+ cb_idle();
+ }
+
+ if(upd_pending && mapped) {
+ upd_pending = 0;
+ cb_display();
+ }
+}
+
+static void cleanup(void)
+{
+ if(win) {
+ wglMakeCurrent(dc, 0);
+ wglDeleteContext(ctx);
+ UnregisterClass("MiniGLUT", hinst);
+ }
+}
+
+void glutSwapBuffers(void)
+{
+ SwapBuffers(dc);
+}
+
+void glutPositionWindow(int x, int y)
+{
+ RECT rect;
+ unsigned int flags = SWP_SHOWWINDOW;
+
+ if(fullscreen) {
+ rect.left = prev_win_x;
+ rect.top = prev_win_y;
+ rect.right = rect.left + prev_win_width;
+ rect.bottom = rect.top + prev_win_height;
+ SetWindowLong(win, GWL_STYLE, WS_OVERLAPPEDWINDOW);
+ fullscreen = 0;
+ flags |= SWP_FRAMECHANGED;
+ } else {
+ GetWindowRect(win, &rect);
+ }
+ SetWindowPos(win, HWND_NOTOPMOST, x, y, rect.right - rect.left, rect.bottom - rect.top, flags);
+}
+
+void glutReshapeWindow(int xsz, int ysz)
+{
+ RECT rect;
+ unsigned int flags = SWP_SHOWWINDOW;
+
+ if(fullscreen) {
+ rect.left = prev_win_x;
+ rect.top = prev_win_y;
+ SetWindowLong(win, GWL_STYLE, WS_OVERLAPPEDWINDOW);
+ fullscreen = 0;
+ flags |= SWP_FRAMECHANGED;
+ } else {
+ GetWindowRect(win, &rect);
+ }
+ SetWindowPos(win, HWND_NOTOPMOST, rect.left, rect.top, xsz, ysz, flags);
+}
+
+void glutFullScreen(void)
+{
+ RECT rect;
+ int scr_width, scr_height;
+
+ if(fullscreen) return;
+
+ GetWindowRect(win, &rect);
+ prev_win_x = rect.left;
+ prev_win_y = rect.top;
+ prev_win_width = rect.right - rect.left;
+ prev_win_height = rect.bottom - rect.top;
+
+ get_screen_size(&scr_width, &scr_height);
+
+ SetWindowLong(win, GWL_STYLE, 0);
+ SetWindowPos(win, HWND_TOPMOST, 0, 0, scr_width, scr_height, SWP_SHOWWINDOW);
+
+ fullscreen = 1;
+}
+
+void glutSetWindowTitle(const char *title)
+{
+ SetWindowText(win, title);
+}
+
+void glutSetIconTitle(const char *title)
+{
+}
+
+void glutSetCursor(int cidx)
+{
+ switch(cidx) {
+ case GLUT_CURSOR_NONE:
+ ShowCursor(0);
+ break;
+ case GLUT_CURSOR_INHERIT:
+ case GLUT_CURSOR_LEFT_ARROW:
+ default:
+ SetCursor(LoadCursor(0, IDC_ARROW));
+ ShowCursor(1);
+ }
+}
+
+void glutSetColor(int idx, float r, float g, float b)
+{
+ PALETTEENTRY col;
+
+ if(idx < 0 || idx >= 256 || !cmap) {
+ return;
+ }
+
+ col.peRed = (int)(r * 255.0f);
+ col.peGreen = (int)(g * 255.0f);
+ col.peBlue = (int)(b * 255.0f);
+ col.peFlags = PC_NOCOLLAPSE;
+
+ SetPaletteEntries(cmap, idx, 1, &col);
+
+ if(dc) {
+ UnrealizeObject(cmap);
+ SelectPalette(dc, cmap, 0);
+ RealizePalette(dc);
+ }
+}
+
+float glutGetColor(int idx, int comp)
+{
+ PALETTEENTRY col;
+
+ if(idx < 0 || idx >= 256 || !cmap) {
+ return -1.0f;
+ }
+
+ if(!GetPaletteEntries(cmap, idx, 1, &col)) {
+ return -1.0f;
+ }
+
+ switch(comp) {
+ case GLUT_RED:
+ return col.peRed / 255.0f;
+ case GLUT_GREEN:
+ return col.peGreen / 255.0f;
+ case GLUT_BLUE:
+ return col.peBlue / 255.0f;
+ default:
+ break;
+ }
+ return -1.0f;
+}
+
+void glutSetKeyRepeat(int repmode)
+{
+}
+
+#define WGL_DRAW_TO_WINDOW 0x2001
+#define WGL_ACCELERATION 0x2003
+#define WGL_SUPPORT_OPENGL 0x2010
+#define WGL_DOUBLE_BUFFER 0x2011
+#define WGL_STEREO 0x2012
+#define WGL_PIXEL_TYPE 0x2013
+#define WGL_COLOR_BITS 0x2014
+#define WGL_RED_BITS 0x2015
+#define WGL_GREEN_BITS 0x2017
+#define WGL_BLUE_BITS 0x2019
+#define WGL_ALPHA_BITS 0x201b
+#define WGL_ACCUM_BITS 0x201d
+#define WGL_DEPTH_BITS 0x2022
+#define WGL_STENCIL_BITS 0x2023
+#define WGL_FULL_ACCELERATION 0x2027
+
+#define WGL_TYPE_RGBA 0x202b
+#define WGL_TYPE_COLORINDEX 0x202c
+
+#define WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB 0x20a9
+#define WGL_SAMPLE_BUFFERS_ARB 0x2041
+#define WGL_SAMPLES_ARB 0x2042
+
+static PROC wglChoosePixelFormat;
+static PROC wglGetPixelFormatAttribiv;
+
+#define ATTR(a, v) \
+ do { *aptr++ = (a); *aptr++ = (v); } while(0)
+
+static unsigned int choose_pixfmt(unsigned int mode)
+{
+ unsigned int num_pixfmt, pixfmt = 0;
+ int attr[32] = { WGL_DRAW_TO_WINDOW, 1, WGL_SUPPORT_OPENGL, 1,
+ WGL_ACCELERATION, WGL_FULL_ACCELERATION };
+ float fattr[2] = {0, 0};
+
+ int *aptr = attr + 6;
+ int *samples = 0;
+
+ if(mode & GLUT_DOUBLE) {
+ ATTR(WGL_DOUBLE_BUFFER, 1);
+ }
+
+ ATTR(WGL_PIXEL_TYPE, mode & GLUT_INDEX ? WGL_TYPE_COLORINDEX : WGL_TYPE_RGBA);
+ ATTR(WGL_COLOR_BITS, mode & GLUT_INDEX ? 8 : 24);
+ if(mode & GLUT_ALPHA) {
+ ATTR(WGL_ALPHA_BITS, 4);
+ }
+ if(mode & GLUT_DEPTH) {
+ ATTR(WGL_DEPTH_BITS, 16);
+ }
+ if(mode & GLUT_STENCIL) {
+ ATTR(WGL_STENCIL_BITS, 1);
+ }
+ if(mode & GLUT_ACCUM) {
+ ATTR(WGL_ACCUM_BITS, 1);
+ }
+ if(mode & GLUT_STEREO) {
+ ATTR(WGL_STEREO, 1);
+ }
+ if(mode & GLUT_SRGB) {
+ ATTR(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB, 1);
+ }
+ if(mode & GLUT_MULTISAMPLE) {
+ ATTR(WGL_SAMPLE_BUFFERS_ARB, 1);
+ *aptr++ = WGL_SAMPLES_ARB;
+ samples = aptr;
+ *aptr++ = 32;
+ }
+ *aptr++ = 0;
+
+ while((!wglChoosePixelFormat(dc, attr, fattr, 1, &pixfmt, &num_pixfmt) || !num_pixfmt) && samples && *samples) {
+ *samples >>= 1;
+ if(!*samples) {
+ aptr[-3] = 0;
+ }
+ }
+ return pixfmt;
+}
+
+static PIXELFORMATDESCRIPTOR pfd;
+static PIXELFORMATDESCRIPTOR tmppfd = {
+ sizeof tmppfd, 1, PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
+ PFD_TYPE_RGBA, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24, 8, 0,
+ PFD_MAIN_PLANE, 0, 0, 0, 0
+};
+#define TMPCLASS "TempMiniGLUT"
+
+#define GETATTR(attr, vptr) \
+ do { \
+ int gattr = attr; \
+ wglGetPixelFormatAttribiv(dc, pixfmt, 0, 1, &gattr, vptr); \
+ } while(0)
+
+static int create_window_wglext(const char *title, int width, int height)
+{
+ WNDCLASSEX wc = {0};
+ HWND tmpwin = 0;
+ HDC tmpdc = 0;
+ HGLRC tmpctx = 0;
+ int pixfmt;
+
+ /* create a temporary window and GL context, just to query and retrieve
+ * the wglChoosePixelFormatEXT function
+ */
+ wc.cbSize = sizeof wc;
+ wc.hbrBackground = GetStockObject(BLACK_BRUSH);
+ wc.hCursor = LoadCursor(0, IDC_ARROW);
+ wc.hIcon = wc.hIconSm = LoadIcon(0, IDI_APPLICATION);
+ wc.hInstance = hinst;
+ wc.lpfnWndProc = DefWindowProc;
+ wc.lpszClassName = TMPCLASS;
+ wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+ if(!RegisterClassEx(&wc)) {
+ return 0;
+ }
+ if(!(tmpwin = CreateWindow(TMPCLASS, "temp", WS_OVERLAPPEDWINDOW, 0, 0,
+ width, height, 0, 0, hinst, 0))) {
+ goto fail;
+ }
+ tmpdc = GetDC(tmpwin);
+
+ if(!(pixfmt = ChoosePixelFormat(tmpdc, &tmppfd)) ||
+ !SetPixelFormat(tmpdc, pixfmt, &tmppfd) ||
+ !(tmpctx = wglCreateContext(tmpdc))) {
+ goto fail;
+ }
+ wglMakeCurrent(tmpdc, tmpctx);
+
+ if(!(wglChoosePixelFormat = wglGetProcAddress("wglChoosePixelFormatARB"))) {
+ if(!(wglChoosePixelFormat = wglGetProcAddress("wglChoosePixelFormatEXT"))) {
+ goto fail;
+ }
+ if(!(wglGetPixelFormatAttribiv = wglGetProcAddress("wglGetPixelFormatAttribivEXT"))) {
+ goto fail;
+ }
+ } else {
+ if(!(wglGetPixelFormatAttribiv = wglGetProcAddress("wglGetPixelFormatAttribivARB"))) {
+ goto fail;
+ }
+ }
+ wglMakeCurrent(0, 0);
+ wglDeleteContext(tmpctx);
+ DestroyWindow(tmpwin);
+ UnregisterClass(TMPCLASS, hinst);
+
+ /* create the real window and context */
+ if(!(win = CreateWindow("MiniGLUT", title, WS_OVERLAPPEDWINDOW, init_x,
+ init_y, width, height, 0, 0, hinst, 0))) {
+ panic("Failed to create window\n");
+ }
+ dc = GetDC(win);
+
+ if(!(pixfmt = choose_pixfmt(init_mode))) {
+ panic("Failed to find suitable pixel format\n");
+ }
+ if(!SetPixelFormat(dc, pixfmt, &pfd)) {
+ panic("Failed to set the selected pixel format\n");
+ }
+ if(!(ctx = wglCreateContext(dc))) {
+ panic("Failed to create the OpenGL context\n");
+ }
+ wglMakeCurrent(dc, ctx);
+
+ GETATTR(WGL_RED_BITS, &ctx_info.rsize);
+ GETATTR(WGL_GREEN_BITS, &ctx_info.gsize);
+ GETATTR(WGL_BLUE_BITS, &ctx_info.bsize);
+ GETATTR(WGL_ALPHA_BITS, &ctx_info.asize);
+ GETATTR(WGL_DEPTH_BITS, &ctx_info.zsize);
+ GETATTR(WGL_STENCIL_BITS, &ctx_info.ssize);
+ GETATTR(WGL_DOUBLE_BUFFER, &ctx_info.dblbuf);
+ GETATTR(WGL_FRAMEBUFFER_SRGB_CAPABLE_ARB, &ctx_info.srgb);
+ GETATTR(WGL_SAMPLES_ARB, &ctx_info.samples);
+
+ return 0;
+
+fail:
+ if(tmpctx) {
+ wglMakeCurrent(0, 0);
+ wglDeleteContext(tmpctx);
+ }
+ if(tmpwin) {
+ DestroyWindow(tmpwin);
+ }
+ UnregisterClass(TMPCLASS, hinst);
+ return -1;
+}
+
+
+static void create_window(const char *title)
+{
+ RECT rect;
+ int i, pixfmt, width, height;
+ char palbuf[sizeof(LOGPALETTE) + 255 * sizeof(PALETTEENTRY)];
+ LOGPALETTE *logpal;
+
+
+ rect.left = init_x;
+ rect.top = init_y;
+ rect.right = init_x + init_width;
+ rect.bottom = init_y + init_height;
+ AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, 0);
+ width = rect.right - rect.left;
+ height = rect.bottom - rect.top;
+
+ memset(&pfd, 0, sizeof pfd);
+ pfd.nSize = sizeof pfd;
+ pfd.nVersion = 1;
+ pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+ if(init_mode & GLUT_STEREO) {
+ pfd.dwFlags |= PFD_STEREO;
+ }
+ if(init_mode & GLUT_INDEX) {
+ pfd.iPixelType = PFD_TYPE_COLORINDEX;
+ pfd.cColorBits = 8;
+ } else {
+ pfd.iPixelType = PFD_TYPE_RGBA;
+ pfd.cColorBits = 24;
+ }
+ if(init_mode & GLUT_ALPHA) {
+ pfd.cAlphaBits = 8;
+ }
+ if(init_mode & GLUT_ACCUM) {
+ pfd.cAccumBits = 24;
+ }
+ if(init_mode & GLUT_DEPTH) {
+ pfd.cDepthBits = 24;
+ }
+ if(init_mode & GLUT_STENCIL) {
+ pfd.cStencilBits = 8;
+ }
+ pfd.iLayerType = PFD_MAIN_PLANE;
+
+ if(init_mode & (GLUT_SRGB | GLUT_MULTISAMPLE)) {
+ if(create_window_wglext(title, width, height) != -1) {
+ goto ctxdone;
+ }
+ }
+
+ /* if we don't need sRGB or multisample, or if the wglChoosePixelFormat method
+ * failed, just use the old-style ChoosePixelFormat method instead
+ */
+ if(!(win = CreateWindow("MiniGLUT", title, WS_OVERLAPPEDWINDOW,
+ rect.left, rect.top, width, height, 0, 0, hinst, 0))) {
+ panic("Failed to create window\n");
+ }
+ dc = GetDC(win);
+
+ if(!(pixfmt = ChoosePixelFormat(dc, &pfd))) {
+ panic("Failed to find suitable pixel format\n");
+ }
+ if(!SetPixelFormat(dc, pixfmt, &pfd)) {
+ panic("Failed to set the selected pixel format\n");
+ }
+ if(!(ctx = wglCreateContext(dc))) {
+ panic("Failed to create the OpenGL context\n");
+ }
+ wglMakeCurrent(dc, ctx);
+
+ DescribePixelFormat(dc, pixfmt, sizeof pfd, &pfd);
+ ctx_info.rsize = pfd.cRedBits;
+ ctx_info.gsize = pfd.cGreenBits;
+ ctx_info.bsize = pfd.cBlueBits;
+ ctx_info.asize = pfd.cAlphaBits;
+ ctx_info.zsize = pfd.cDepthBits;
+ ctx_info.ssize = pfd.cStencilBits;
+ ctx_info.dblbuf = pfd.dwFlags & PFD_DOUBLEBUFFER ? 1 : 0;
+ ctx_info.samples = 0;
+ ctx_info.srgb = 0;
+
+ctxdone:
+ ShowWindow(win, 1);
+ SetForegroundWindow(win);
+ SetFocus(win);
+
+ if(init_mode & GLUT_INDEX) {
+ logpal = (LOGPALETTE*)palbuf;
+
+ GetSystemPaletteEntries(dc, 0, 256, logpal->palPalEntry);
+
+ logpal->palVersion = 0x300;
+ logpal->palNumEntries = 256;
+
+ if(!(cmap = CreatePalette(logpal))) {
+ panic("Failed to create palette in indexed mode");
+ }
+ SelectPalette(dc, cmap, 0);
+ RealizePalette(dc);
+
+ cmap_size = 256;
+ } else {
+ if(GetDeviceCaps(dc, BITSPIXEL) * GetDeviceCaps(dc, PLANES) <= 8) {
+ /* for RGB mode in 8bpp displays we also need to set up a palette
+ * with RGB 332 colors
+ */
+ logpal = (LOGPALETTE*)palbuf;
+
+ logpal->palVersion = 0x300;
+ logpal->palNumEntries = 256;
+
+ for(i=0; i<256; i++) {
+ int r = i & 7;
+ int g = (i >> 3) & 7;
+ int b = (i >> 5) & 3;
+
+ logpal->palPalEntry[i].peRed = (r << 5) | (r << 2) | (r >> 1);
+ logpal->palPalEntry[i].peGreen = (g << 5) | (g << 2) | (g >> 1);
+ logpal->palPalEntry[i].peBlue = (b << 6) | (b << 4) | (b << 2) | b;
+ logpal->palPalEntry[i].peFlags = PC_NOCOLLAPSE;
+ }
+
+ if((cmap = CreatePalette(logpal))) {
+ SelectPalette(dc, cmap, 0);
+ RealizePalette(dc);
+ cmap_size = 256;
+ }
+ }
+ }
+
+ upd_pending = 1;
+ reshape_pending = 1;
+}
+
+static LRESULT CALLBACK handle_message(HWND win, unsigned int msg, WPARAM wparam, LPARAM lparam)
+{
+ static int mouse_x, mouse_y;
+ int x, y, key;
+
+ switch(msg) {
+ case WM_CLOSE:
+ if(win) DestroyWindow(win);
+ break;
+
+ case WM_DESTROY:
+ cleanup();
+ quit = 1;
+ PostQuitMessage(0);
+ break;
+
+ case WM_PAINT:
+ upd_pending = 1;
+ ValidateRect(win, 0);
+ break;
+
+ case WM_SIZE:
+ x = lparam & 0xffff;
+ y = lparam >> 16;
+ if(x != win_width && y != win_height) {
+ win_width = x;
+ win_height = y;
+ if(cb_reshape) {
+ reshape_pending = 0;
+ cb_reshape(win_width, win_height);
+ }
+ }
+ break;
+
+ case WM_SHOWWINDOW:
+ mapped = wparam;
+ if(cb_vis) cb_vis(mapped ? GLUT_VISIBLE : GLUT_NOT_VISIBLE);
+ break;
+
+ case WM_KEYDOWN:
+ case WM_SYSKEYDOWN:
+ update_modkeys();
+ key = translate_vkey(wparam);
+ if(key < 256) {
+ if(cb_keydown) {
+ cb_keydown((unsigned char)key, mouse_x, mouse_y);
+ }
+ } else {
+ if(cb_skeydown) {
+ cb_skeydown(key, mouse_x, mouse_y);
+ }
+ }
+ break;
+
+ case WM_KEYUP:
+ case WM_SYSKEYUP:
+ update_modkeys();
+ key = translate_vkey(wparam);
+ if(key < 256) {
+ if(cb_keyup) {
+ cb_keyup((unsigned char)key, mouse_x, mouse_y);
+ }
+ } else {
+ if(cb_skeyup) {
+ cb_skeyup(key, mouse_x, mouse_y);
+ }
+ }
+ break;
+
+ case WM_LBUTTONDOWN:
+ handle_mbutton(0, 1, wparam, lparam);
+ break;
+ case WM_MBUTTONDOWN:
+ handle_mbutton(1, 1, wparam, lparam);
+ break;
+ case WM_RBUTTONDOWN:
+ handle_mbutton(2, 1, wparam, lparam);
+ break;
+ case WM_LBUTTONUP:
+ handle_mbutton(0, 0, wparam, lparam);
+ break;
+ case WM_MBUTTONUP:
+ handle_mbutton(1, 0, wparam, lparam);
+ break;
+ case WM_RBUTTONUP:
+ handle_mbutton(2, 0, wparam, lparam);
+ break;
+
+ case WM_MOUSEMOVE:
+ if(wparam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) {
+ if(cb_motion) cb_motion(lparam & 0xffff, lparam >> 16);
+ } else {
+ if(cb_passive) cb_passive(lparam & 0xffff, lparam >> 16);
+ }
+ break;
+
+ case WM_SYSCOMMAND:
+ wparam &= 0xfff0;
+ if(wparam == SC_KEYMENU || wparam == SC_SCREENSAVE || wparam == SC_MONITORPOWER) {
+ return 0;
+ }
+ default:
+ return DefWindowProc(win, msg, wparam, lparam);
+ }
+
+ return 0;
+}
+
+static void update_modkeys(void)
+{
+ if(GetKeyState(VK_SHIFT) & 0x8000) {
+ modstate |= GLUT_ACTIVE_SHIFT;
+ } else {
+ modstate &= ~GLUT_ACTIVE_SHIFT;
+ }
+ if(GetKeyState(VK_CONTROL) & 0x8000) {
+ modstate |= GLUT_ACTIVE_CTRL;
+ } else {
+ modstate &= ~GLUT_ACTIVE_CTRL;
+ }
+ if(GetKeyState(VK_MENU) & 0x8000) {
+ modstate |= GLUT_ACTIVE_ALT;
+ } else {
+ modstate &= ~GLUT_ACTIVE_ALT;
+ }
+}
+
+#ifndef VK_OEM_1
+#define VK_OEM_1 0xba
+#define VK_OEM_2 0xbf
+#define VK_OEM_3 0xc0
+#define VK_OEM_4 0xdb
+#define VK_OEM_5 0xdc
+#define VK_OEM_6 0xdd
+#define VK_OEM_7 0xde
+#endif
+
+static int translate_vkey(int vkey)
+{
+ switch(vkey) {
+ case VK_PRIOR: return GLUT_KEY_PAGE_UP;
+ case VK_NEXT: return GLUT_KEY_PAGE_DOWN;
+ case VK_END: return GLUT_KEY_END;
+ case VK_HOME: return GLUT_KEY_HOME;
+ case VK_LEFT: return GLUT_KEY_LEFT;
+ case VK_UP: return GLUT_KEY_UP;
+ case VK_RIGHT: return GLUT_KEY_RIGHT;
+ case VK_DOWN: return GLUT_KEY_DOWN;
+ case VK_OEM_1: return ';';
+ case VK_OEM_2: return '/';
+ case VK_OEM_3: return '`';
+ case VK_OEM_4: return '[';
+ case VK_OEM_5: return '\\';
+ case VK_OEM_6: return ']';
+ case VK_OEM_7: return '\'';
+ default:
+ break;
+ }
+
+ if(vkey >= 'A' && vkey <= 'Z') {
+ vkey += 32;
+ } else if(vkey >= VK_F1 && vkey <= VK_F12) {
+ vkey -= VK_F1 + GLUT_KEY_F1;
+ }
+
+ return vkey;
+}
+
+static void handle_mbutton(int bn, int st, WPARAM wparam, LPARAM lparam)
+{
+ int x, y;
+
+ update_modkeys();
+
+ if(cb_mouse) {
+ x = lparam & 0xffff;
+ y = lparam >> 16;
+ cb_mouse(bn, st ? GLUT_DOWN : GLUT_UP, x, y);
+ }
+}
+
+static void get_window_pos(int *x, int *y)
+{
+ RECT rect;
+ GetWindowRect(win, &rect);
+ *x = rect.left;
+ *y = rect.top;
+}
+
+static void get_window_size(int *w, int *h)
+{
+ RECT rect;
+ GetClientRect(win, &rect);
+ *w = rect.right - rect.left;
+ *h = rect.bottom - rect.top;
+}
+
+static void get_screen_size(int *scrw, int *scrh)
+{
+ *scrw = GetSystemMetrics(SM_CXSCREEN);
+ *scrh = GetSystemMetrics(SM_CYSCREEN);
+}
+#endif /* BUILD_WIN32 */
+
+#if defined(unix) || defined(__unix__) || defined(__APPLE__)
+#include <sys/time.h>
+
+#ifdef MINIGLUT_USE_LIBC
+#define sys_gettimeofday(tv, tz) gettimeofday(tv, tz)
+#else
+static int sys_gettimeofday(struct timeval *tv, struct timezone *tz);
+#endif
+
+static long get_msec(void)
+{
+ static struct timeval tv0;
+ struct timeval tv;
+
+ sys_gettimeofday(&tv, 0);
+ if(tv0.tv_sec == 0 && tv0.tv_usec == 0) {
+ tv0 = tv;
+ return 0;
+ }
+ return (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
+}
+#endif /* UNIX */
+#ifdef _WIN32
+static long get_msec(void)
+{
+ static long t0;
+ long tm;
+
+#ifdef MINIGLUT_NO_WINMM
+ tm = GetTickCount();
+#else
+ tm = timeGetTime();
+#endif
+ if(!t0) {
+ t0 = tm;
+ return 0;
+ }
+ return tm - t0;
+}
+#endif
+
+static void panic(const char *msg)
+{
+ const char *end = msg;
+ while(*end) end++;
+ sys_write(2, msg, end - msg);
+ sys_exit(1);
+}
+
+
+#ifdef MINIGLUT_USE_LIBC
+#include <stdlib.h>
+#ifdef _WIN32
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+
+static void sys_exit(int status)
+{
+ exit(status);
+}
+
+static int sys_write(int fd, const void *buf, int count)
+{
+ return write(fd, buf, count);
+}
+
+#else /* !MINIGLUT_USE_LIBC */
+
+#ifdef __linux__
+#ifdef __x86_64__
+static void sys_exit(int status)
+{
+ asm volatile(
+ "syscall\n\t"
+ :: "a"(60), "D"(status));
+}
+static int sys_write(int fd, const void *buf, int count)
+{
+ long res;
+ asm volatile(
+ "syscall\n\t"
+ : "=a"(res)
+ : "a"(1), "D"(fd), "S"(buf), "d"(count));
+ return res;
+}
+static int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ int res;
+ asm volatile(
+ "syscall\n\t"
+ : "=a"(res)
+ : "a"(96), "D"(tv), "S"(tz));
+ return res;
+}
+#endif /* __x86_64__ */
+#ifdef __i386__
+static void sys_exit(int status)
+{
+ asm volatile(
+ "int $0x80\n\t"
+ :: "a"(1), "b"(status));
+}
+static int sys_write(int fd, const void *buf, int count)
+{
+ int res;
+ asm volatile(
+ "int $0x80\n\t"
+ : "=a"(res)
+ : "a"(4), "b"(fd), "c"(buf), "d"(count));
+ return res;
+}
+static int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ int res;
+ asm volatile(
+ "int $0x80\n\t"
+ : "=a"(res)
+ : "a"(78), "b"(tv), "c"(tz));
+ return res;
+}
+#endif /* __i386__ */
+#endif /* __linux__ */
+
+#ifdef _WIN32
+static void sys_exit(int status)
+{
+ ExitProcess(status);
+}
+static int sys_write(int fd, const void *buf, int count)
+{
+ unsigned long wrsz = 0;
+
+ HANDLE out = GetStdHandle(fd == 1 ? STD_OUTPUT_HANDLE : STD_ERROR_HANDLE);
+ if(!WriteFile(out, buf, count, &wrsz, 0)) {
+ return -1;
+ }
+ return wrsz;
+}
+#endif /* _WIN32 */
+#endif /* !MINIGLUT_USE_LIBC */
+
+
+/* ----------------- primitives ------------------ */
+#ifdef MINIGLUT_USE_LIBC
+#include <stdlib.h>
+#include <math.h>
+
+void mglut_sincos(float angle, float *sptr, float *cptr)
+{
+ *sptr = sin(angle);
+ *cptr = cos(angle);
+}
+
+float mglut_atan(float x)
+{
+ return atan(x);
+}
+
+#else /* !MINIGLUT_USE_LIBC */
+
+#ifdef __GNUC__
+void mglut_sincos(float angle, float *sptr, float *cptr)
+{
+ asm volatile(
+ "flds %2\n\t"
+ "fsincos\n\t"
+ "fstps %1\n\t"
+ "fstps %0\n\t"
+ : "=m"(*sptr), "=m"(*cptr)
+ : "m"(angle)
+ );
+}
+
+float mglut_atan(float x)
+{
+ float res;
+ asm volatile(
+ "flds %1\n\t"
+ "fld1\n\t"
+ "fpatan\n\t"
+ "fstps %0\n\t"
+ : "=m"(res)
+ : "m"(x)
+ );
+ return res;
+}
+#endif
+
+#ifdef _MSC_VER
+void mglut_sincos(float angle, float *sptr, float *cptr)
+{
+ float s, c;
+ __asm {
+ fld angle
+ fsincos
+ fstp c
+ fstp s
+ }
+ *sptr = s;
+ *cptr = c;
+}
+
+float mglut_atan(float x)
+{
+ float res;
+ __asm {
+ fld x
+ fld1
+ fpatan
+ fstp res
+ }
+ return res;
+}
+#endif
+
+#ifdef __WATCOMC__
+#pragma aux mglut_sincos = \
+ "fsincos" \
+ "fstp dword ptr [edx]" \
+ "fstp dword ptr [eax]" \
+ parm[8087][eax][edx] \
+ modify[8087];
+
+#pragma aux mglut_atan = \
+ "fld1" \
+ "fpatan" \
+ parm[8087] \
+ value[8087] \
+ modify [8087];
+#endif /* __WATCOMC__ */
+
+#endif /* !MINIGLUT_USE_LIBC */
+
+#define PI 3.1415926536f
+
+void glutSolidSphere(float rad, int slices, int stacks)
+{
+ int i, j, k, gray;
+ float x, y, z, s, t, u, v, phi, theta, sintheta, costheta, sinphi, cosphi;
+ float du = 1.0f / (float)slices;
+ float dv = 1.0f / (float)stacks;
+
+ glBegin(GL_QUADS);
+ for(i=0; i<stacks; i++) {
+ v = i * dv;
+ for(j=0; j<slices; j++) {
+ u = j * du;
+ for(k=0; k<4; k++) {
+ gray = k ^ (k >> 1);
+ s = gray & 1 ? u + du : u;
+ t = gray & 2 ? v + dv : v;
+ theta = s * PI * 2.0f;
+ phi = t * PI;
+ mglut_sincos(theta, &sintheta, &costheta);
+ mglut_sincos(phi, &sinphi, &cosphi);
+ x = sintheta * sinphi;
+ y = costheta * sinphi;
+ z = cosphi;
+
+ glColor3f(s, t, 1);
+ glTexCoord2f(s, t);
+ glNormal3f(x, y, z);
+ glVertex3f(x * rad, y * rad, z * rad);
+ }
+ }
+ }
+ glEnd();
+}
+
+void glutWireSphere(float rad, int slices, int stacks)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidSphere(rad, slices, stacks);
+ glPopAttrib();
+}
+
+void glutSolidCube(float sz)
+{
+ int i, j, idx, gray, flip, rotx;
+ float vpos[3], norm[3];
+ float rad = sz * 0.5f;
+
+ glBegin(GL_QUADS);
+ for(i=0; i<6; i++) {
+ flip = i & 1;
+ rotx = i >> 2;
+ idx = (~i & 2) - rotx;
+ norm[0] = norm[1] = norm[2] = 0.0f;
+ norm[idx] = flip ^ ((i >> 1) & 1) ? -1 : 1;
+ glNormal3fv(norm);
+ vpos[idx] = norm[idx] * rad;
+ for(j=0; j<4; j++) {
+ gray = j ^ (j >> 1);
+ vpos[i & 2] = (gray ^ flip) & 1 ? rad : -rad;
+ vpos[rotx + 1] = (gray ^ (rotx << 1)) & 2 ? rad : -rad;
+ glTexCoord2f(gray & 1, gray >> 1);
+ glVertex3fv(vpos);
+ }
+ }
+ glEnd();
+}
+
+void glutWireCube(float sz)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidCube(sz);
+ glPopAttrib();
+}
+
+static void draw_cylinder(float rbot, float rtop, float height, int slices, int stacks)
+{
+ int i, j, k, gray;
+ float x, y, z, s, t, u, v, theta, phi, sintheta, costheta, sinphi, cosphi, rad;
+ float du = 1.0f / (float)slices;
+ float dv = 1.0f / (float)stacks;
+
+ rad = rbot - rtop;
+ phi = mglut_atan((rad < 0 ? -rad : rad) / height);
+ mglut_sincos(phi, &sinphi, &cosphi);
+
+ glBegin(GL_QUADS);
+ for(i=0; i<stacks; i++) {
+ v = i * dv;
+ for(j=0; j<slices; j++) {
+ u = j * du;
+ for(k=0; k<4; k++) {
+ gray = k ^ (k >> 1);
+ s = gray & 2 ? u + du : u;
+ t = gray & 1 ? v + dv : v;
+ rad = rbot + (rtop - rbot) * t;
+ theta = s * PI * 2.0f;
+ mglut_sincos(theta, &sintheta, &costheta);
+
+ x = sintheta * cosphi;
+ y = costheta * cosphi;
+ z = sinphi;
+
+ glColor3f(s, t, 1);
+ glTexCoord2f(s, t);
+ glNormal3f(x, y, z);
+ glVertex3f(sintheta * rad, costheta * rad, t * height);
+ }
+ }
+ }
+ glEnd();
+}
+
+void glutSolidCone(float base, float height, int slices, int stacks)
+{
+ draw_cylinder(base, 0, height, slices, stacks);
+}
+
+void glutWireCone(float base, float height, int slices, int stacks)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidCone(base, height, slices, stacks);
+ glPopAttrib();
+}
+
+void glutSolidCylinder(float rad, float height, int slices, int stacks)
+{
+ draw_cylinder(rad, rad, height, slices, stacks);
+}
+
+void glutWireCylinder(float rad, float height, int slices, int stacks)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidCylinder(rad, height, slices, stacks);
+ glPopAttrib();
+}
+
+void glutSolidTorus(float inner_rad, float outer_rad, int sides, int rings)
+{
+ int i, j, k, gray;
+ float x, y, z, s, t, u, v, phi, theta, sintheta, costheta, sinphi, cosphi;
+ float du = 1.0f / (float)rings;
+ float dv = 1.0f / (float)sides;
+
+ glBegin(GL_QUADS);
+ for(i=0; i<rings; i++) {
+ u = i * du;
+ for(j=0; j<sides; j++) {
+ v = j * dv;
+ for(k=0; k<4; k++) {
+ gray = k ^ (k >> 1);
+ s = gray & 1 ? u + du : u;
+ t = gray & 2 ? v + dv : v;
+ theta = s * PI * 2.0f;
+ phi = t * PI * 2.0f;
+ mglut_sincos(theta, &sintheta, &costheta);
+ mglut_sincos(phi, &sinphi, &cosphi);
+ x = sintheta * sinphi;
+ y = costheta * sinphi;
+ z = cosphi;
+
+ glColor3f(s, t, 1);
+ glTexCoord2f(s, t);
+ glNormal3f(x, y, z);
+
+ x = x * inner_rad + sintheta * outer_rad;
+ y = y * inner_rad + costheta * outer_rad;
+ z *= inner_rad;
+ glVertex3f(x, y, z);
+ }
+ }
+ }
+ glEnd();
+}
+
+void glutWireTorus(float inner_rad, float outer_rad, int sides, int rings)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidTorus(inner_rad, outer_rad, sides, rings);
+ glPopAttrib();
+}
+
+#define NUM_TEAPOT_INDICES (sizeof teapot_index / sizeof *teapot_index)
+#define NUM_TEAPOT_VERTS (sizeof teapot_verts / sizeof *teapot_verts)
+
+#define NUM_TEAPOT_PATCHES (NUM_TEAPOT_INDICES / 16)
+
+#define PATCH_SUBDIV 7
+
+static float teapot_part_flip[] = {
+ 1, 1, 1, 1, /* rim flip */
+ 1, 1, 1, 1, /* body1 flip */
+ 1, 1, 1, 1, /* body2 flip */
+ 1, 1, 1, 1, /* lid patch 1 flip */
+ 1, 1, 1, 1, /* lid patch 2 flip */
+ 1, -1, /* handle 1 flip */
+ 1, -1, /* handle 2 flip */
+ 1, -1, /* spout 1 flip */
+ 1, -1, /* spout 2 flip */
+ 1, 1, 1, 1 /* bottom flip */
+};
+
+static float teapot_part_rot[] = {
+ 0, 90, 180, 270, /* rim rotations */
+ 0, 90, 180, 270, /* body patch 1 rotations */
+ 0, 90, 180, 270, /* body patch 2 rotations */
+ 0, 90, 180, 270, /* lid patch 1 rotations */
+ 0, 90, 180, 270, /* lid patch 2 rotations */
+ 0, 0, /* handle 1 rotations */
+ 0, 0, /* handle 2 rotations */
+ 0, 0, /* spout 1 rotations */
+ 0, 0, /* spout 2 rotations */
+ 0, 90, 180, 270 /* bottom rotations */
+};
+
+
+static int teapot_index[] = {
+ /* rim */
+ 102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ /* body1 */
+ 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
+ 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
+ 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
+ 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
+ /* body 2 */
+ 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ /* lid 1 */
+ 96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,
+ 96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,
+ 96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,
+ 96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,
+ /* lid 2 */
+ 0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
+ 0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
+ 0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
+ 0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
+ /* handle 1 */
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56,
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56,
+ /* handle 2 */
+ 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67,
+ 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67,
+ /* spout 1 */
+ 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
+ 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
+ /* spout 2 */
+ 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
+ 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
+ /* bottom */
+ 118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37,
+ 118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37,
+ 118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37,
+ 118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37
+};
+
+
+static float teapot_verts[][3] = {
+ { 0.2000, 0.0000, 2.70000 }, { 0.2000, -0.1120, 2.70000 },
+ { 0.1120, -0.2000, 2.70000 }, { 0.0000, -0.2000, 2.70000 },
+ { 1.3375, 0.0000, 2.53125 }, { 1.3375, -0.7490, 2.53125 },
+ { 0.7490, -1.3375, 2.53125 }, { 0.0000, -1.3375, 2.53125 },
+ { 1.4375, 0.0000, 2.53125 }, { 1.4375, -0.8050, 2.53125 },
+ { 0.8050, -1.4375, 2.53125 }, { 0.0000, -1.4375, 2.53125 },
+ { 1.5000, 0.0000, 2.40000 }, { 1.5000, -0.8400, 2.40000 },
+ { 0.8400, -1.5000, 2.40000 }, { 0.0000, -1.5000, 2.40000 },
+ { 1.7500, 0.0000, 1.87500 }, { 1.7500, -0.9800, 1.87500 },
+ { 0.9800, -1.7500, 1.87500 }, { 0.0000, -1.7500, 1.87500 },
+ { 2.0000, 0.0000, 1.35000 }, { 2.0000, -1.1200, 1.35000 },
+ { 1.1200, -2.0000, 1.35000 }, { 0.0000, -2.0000, 1.35000 },
+ { 2.0000, 0.0000, 0.90000 }, { 2.0000, -1.1200, 0.90000 },
+ { 1.1200, -2.0000, 0.90000 }, { 0.0000, -2.0000, 0.90000 },
+ { -2.0000, 0.0000, 0.90000 }, { 2.0000, 0.0000, 0.45000 },
+ { 2.0000, -1.1200, 0.45000 }, { 1.1200, -2.0000, 0.45000 },
+ { 0.0000, -2.0000, 0.45000 }, { 1.5000, 0.0000, 0.22500 },
+ { 1.5000, -0.8400, 0.22500 }, { 0.8400, -1.5000, 0.22500 },
+ { 0.0000, -1.5000, 0.22500 }, { 1.5000, 0.0000, 0.15000 },
+ { 1.5000, -0.8400, 0.15000 }, { 0.8400, -1.5000, 0.15000 },
+ { 0.0000, -1.5000, 0.15000 }, { -1.6000, 0.0000, 2.02500 },
+ { -1.6000, -0.3000, 2.02500 }, { -1.5000, -0.3000, 2.25000 },
+ { -1.5000, 0.0000, 2.25000 }, { -2.3000, 0.0000, 2.02500 },
+ { -2.3000, -0.3000, 2.02500 }, { -2.5000, -0.3000, 2.25000 },
+ { -2.5000, 0.0000, 2.25000 }, { -2.7000, 0.0000, 2.02500 },
+ { -2.7000, -0.3000, 2.02500 }, { -3.0000, -0.3000, 2.25000 },
+ { -3.0000, 0.0000, 2.25000 }, { -2.7000, 0.0000, 1.80000 },
+ { -2.7000, -0.3000, 1.80000 }, { -3.0000, -0.3000, 1.80000 },
+ { -3.0000, 0.0000, 1.80000 }, { -2.7000, 0.0000, 1.57500 },
+ { -2.7000, -0.3000, 1.57500 }, { -3.0000, -0.3000, 1.35000 },
+ { -3.0000, 0.0000, 1.35000 }, { -2.5000, 0.0000, 1.12500 },
+ { -2.5000, -0.3000, 1.12500 }, { -2.6500, -0.3000, 0.93750 },
+ { -2.6500, 0.0000, 0.93750 }, { -2.0000, -0.3000, 0.90000 },
+ { -1.9000, -0.3000, 0.60000 }, { -1.9000, 0.0000, 0.60000 },
+ { 1.7000, 0.0000, 1.42500 }, { 1.7000, -0.6600, 1.42500 },
+ { 1.7000, -0.6600, 0.60000 }, { 1.7000, 0.0000, 0.60000 },
+ { 2.6000, 0.0000, 1.42500 }, { 2.6000, -0.6600, 1.42500 },
+ { 3.1000, -0.6600, 0.82500 }, { 3.1000, 0.0000, 0.82500 },
+ { 2.3000, 0.0000, 2.10000 }, { 2.3000, -0.2500, 2.10000 },
+ { 2.4000, -0.2500, 2.02500 }, { 2.4000, 0.0000, 2.02500 },
+ { 2.7000, 0.0000, 2.40000 }, { 2.7000, -0.2500, 2.40000 },
+ { 3.3000, -0.2500, 2.40000 }, { 3.3000, 0.0000, 2.40000 },
+ { 2.8000, 0.0000, 2.47500 }, { 2.8000, -0.2500, 2.47500 },
+ { 3.5250, -0.2500, 2.49375 }, { 3.5250, 0.0000, 2.49375 },
+ { 2.9000, 0.0000, 2.47500 }, { 2.9000, -0.1500, 2.47500 },
+ { 3.4500, -0.1500, 2.51250 }, { 3.4500, 0.0000, 2.51250 },
+ { 2.8000, 0.0000, 2.40000 }, { 2.8000, -0.1500, 2.40000 },
+ { 3.2000, -0.1500, 2.40000 }, { 3.2000, 0.0000, 2.40000 },
+ { 0.0000, 0.0000, 3.15000 }, { 0.8000, 0.0000, 3.15000 },
+ { 0.8000, -0.4500, 3.15000 }, { 0.4500, -0.8000, 3.15000 },
+ { 0.0000, -0.8000, 3.15000 }, { 0.0000, 0.0000, 2.85000 },
+ { 1.4000, 0.0000, 2.40000 }, { 1.4000, -0.7840, 2.40000 },
+ { 0.7840, -1.4000, 2.40000 }, { 0.0000, -1.4000, 2.40000 },
+ { 0.4000, 0.0000, 2.55000 }, { 0.4000, -0.2240, 2.55000 },
+ { 0.2240, -0.4000, 2.55000 }, { 0.0000, -0.4000, 2.55000 },
+ { 1.3000, 0.0000, 2.55000 }, { 1.3000, -0.7280, 2.55000 },
+ { 0.7280, -1.3000, 2.55000 }, { 0.0000, -1.3000, 2.55000 },
+ { 1.3000, 0.0000, 2.40000 }, { 1.3000, -0.7280, 2.40000 },
+ { 0.7280, -1.3000, 2.40000 }, { 0.0000, -1.3000, 2.40000 },
+ { 0.0000, 0.0000, 0.00000 }, { 1.4250, -0.7980, 0.00000 },
+ { 1.5000, 0.0000, 0.07500 }, { 1.4250, 0.0000, 0.00000 },
+ { 0.7980, -1.4250, 0.00000 }, { 0.0000, -1.5000, 0.07500 },
+ { 0.0000, -1.4250, 0.00000 }, { 1.5000, -0.8400, 0.07500 },
+ { 0.8400, -1.5000, 0.07500 }
+};
+
+static void draw_patch(int *index, int flip, float scale);
+static float bernstein(int i, float x);
+
+void glutSolidTeapot(float size)
+{
+ int i;
+
+ size /= 2.0;
+
+ for(i=0; i<NUM_TEAPOT_PATCHES; i++) {
+ float flip = teapot_part_flip[i];
+ float rot = teapot_part_rot[i];
+
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glTranslatef(0, -3.15 * size * 0.5, 0);
+ glRotatef(rot, 0, 1, 0);
+ glScalef(1, 1, flip);
+ glRotatef(-90, 1, 0, 0);
+
+ draw_patch(teapot_index + i * 16, flip < 0.0 ? 1 : 0, size);
+
+ glPopMatrix();
+ }
+}
+
+void glutWireTeapot(float size)
+{
+ glPushAttrib(GL_POLYGON_BIT);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+ glutSolidTeapot(size);
+ glPopAttrib();
+}
+
+
+static void bezier_patch(float *res, float *cp, float u, float v)
+{
+ int i, j;
+
+ res[0] = res[1] = res[2] = 0.0f;
+
+ for(j=0; j<4; j++) {
+ for(i=0; i<4; i++) {
+ float bu = bernstein(i, u);
+ float bv = bernstein(j, v);
+
+ res[0] += cp[0] * bu * bv;
+ res[1] += cp[1] * bu * bv;
+ res[2] += cp[2] * bu * bv;
+
+ cp += 3;
+ }
+ }
+}
+
+static float rsqrt(float x)
+{
+ float xhalf = x * 0.5f;
+ int i = *(int*)&x;
+ i = 0x5f3759df - (i >> 1);
+ x = *(float*)&i;
+ x = x * (1.5f - xhalf * x * x);
+ return x;
+}
+
+
+#define CROSS(res, a, b) \
+ do { \
+ (res)[0] = (a)[1] * (b)[2] - (a)[2] * (b)[1]; \
+ (res)[1] = (a)[2] * (b)[0] - (a)[0] * (b)[2]; \
+ (res)[2] = (a)[0] * (b)[1] - (a)[1] * (b)[0]; \
+ } while(0)
+
+#define NORMALIZE(v) \
+ do { \
+ float s = rsqrt((v)[0] * (v)[0] + (v)[1] * (v)[1] + (v)[2] * (v)[2]); \
+ (v)[0] *= s; \
+ (v)[1] *= s; \
+ (v)[2] *= s; \
+ } while(0)
+
+#define DT 0.001
+
+static void bezier_patch_norm(float *res, float *cp, float u, float v)
+{
+ float tang[3], bitan[3], tmp[3];
+
+ bezier_patch(tang, cp, u + DT, v);
+ bezier_patch(tmp, cp, u - DT, v);
+ tang[0] -= tmp[0];
+ tang[1] -= tmp[1];
+ tang[2] -= tmp[2];
+
+ bezier_patch(bitan, cp, u, v + DT);
+ bezier_patch(tmp, cp, u, v - DT);
+ bitan[0] -= tmp[0];
+ bitan[1] -= tmp[1];
+ bitan[2] -= tmp[2];
+
+ CROSS(res, tang, bitan);
+ NORMALIZE(res);
+}
+
+
+
+static float bernstein(int i, float x)
+{
+ float invx = 1.0f - x;
+
+ switch(i) {
+ case 0:
+ return invx * invx * invx;
+ case 1:
+ return 3.0f * x * invx * invx;
+ case 2:
+ return 3.0f * x * x * invx;
+ case 3:
+ return x * x * x;
+ default:
+ break;
+ }
+ return 0.0f;
+}
+
+static void draw_patch(int *index, int flip, float scale)
+{
+ static const float uoffs[2][4] = {{0, 0, 1, 1}, {1, 1, 0, 0}};
+ static const float voffs[4] = {0, 1, 1, 0};
+
+ int i, j, k;
+ float cp[16 * 3];
+ float pt[3], n[3];
+ float u, v;
+ float du = 1.0 / PATCH_SUBDIV;
+ float dv = 1.0 / PATCH_SUBDIV;
+
+ /* collect control points */
+ for(i=0; i<16; i++) {
+ cp[i * 3] = teapot_verts[index[i]][0];
+ cp[i * 3 + 1] = teapot_verts[index[i]][1];
+ cp[i * 3 + 2] = teapot_verts[index[i]][2];
+ }
+
+ glBegin(GL_QUADS);
+ glColor3f(1, 1, 1);
+
+ u = 0;
+ for(i=0; i<PATCH_SUBDIV; i++) {
+ v = 0;
+ for(j=0; j<PATCH_SUBDIV; j++) {
+
+ for(k=0; k<4; k++) {
+ bezier_patch(pt, cp, u + uoffs[flip][k] * du, v + voffs[k] * dv);
+
+ /* top/bottom normal hack */
+ if(pt[2] > 3.14) {
+ n[0] = n[1] = 0.0f;
+ n[2] = 1.0f;
+ } else if(pt[2] < 0.00001) {
+ n[0] = n[1] = 0.0f;
+ n[2] = -1.0f;
+ } else {
+ bezier_patch_norm(n, cp, u + uoffs[flip][k] * du, v + voffs[k] * dv);
+ }
+
+ glTexCoord2f(u, v);
+ glNormal3fv(n);
+ glVertex3f(pt[0] * scale, pt[1] * scale, pt[2] * scale);
+ }
+
+ v += dv;
+ }
+ u += du;
+ }
+
+ glEnd();
+}
projects / gbajam22 / commitdiff