added non-dos version
authorJohn Tsiombikas <nuclear@member.fsf.org>
Mon, 9 Oct 2023 13:46:16 +0000 (16:46 +0300)
committerJohn Tsiombikas <nuclear@member.fsf.org>
Mon, 9 Oct 2023 13:46:16 +0000 (16:46 +0300)
.gitignore
Makefile [deleted file]
Makefile.dos [new file with mode: 0644]
Makefile.unix [new file with mode: 0644]
src/game.c
src/nondos/main.c [new file with mode: 0644]
src/nondos/miniglut.c [new file with mode: 0644]
src/nondos/miniglut.h [new file with mode: 0644]

index cec07fe..e85a97a 100644 (file)
@@ -1,4 +1,5 @@
 *.o
+*.o32
 *.d
 *.swp
 *.com
@@ -9,3 +10,5 @@ dosbox.conf
 *.log
 tofloppy
 *.s
+core
+game
diff --git a/Makefile b/Makefile
deleted file mode 100644 (file)
index 9607e6f..0000000
--- a/Makefile
+++ /dev/null
@@ -1,40 +0,0 @@
-csrc = $(wildcard src/*.c) $(wildcard src/kern/*.c) $(wildcard src/libc/*.c) \
-          $(wildcard src/3dgfx/*.c)
-ssrc = $(wildcard src/*.asm) $(wildcard src/kern/*.asm) $(wildcard src/libc/*.asm)
-obj = $(csrc:.c=.o) $(ssrc:.asm=.o)
-dep = $(csrc:.c=.d)
-bin = game.com
-
-warn = -pedantic -Wall -Wno-unused-function
-opt = -O2
-inc = -Isrc -Isrc/3dgfx -Isrc/kern -Isrc/libc
-
-AS = nasm
-
-ASFLAGS = -Isrc/ -Isrc/kern/
-CFLAGS = -m32 -march=i386 $(warn) $(opt) $(dbg) -fno-pic -ffreestanding \
-                -fno-stack-protector -mpreferred-stack-boundary=2 -nostdinc -ffast-math \
-                -fno-asynchronous-unwind-tables -fno-strict-aliasing $(inc) $(def) -MMD
-LDFLAGS = -m elf_i386 -nostdlib -T com32.ld -Map game.map
-
-$(bin): $(obj)
-       $(LD) -o $@ $(obj) $(LDFLAGS)
-
--include $(dep)
-
-%.o: %.asm
-       $(AS) -o $@ -f elf $(ASFLAGS) $<
-
-%.s: %.c
-       $(CC) $(CFLAGS) -masm=intel -S $< -o $@
-
-.PHONY: clean
-clean:
-       rm -f $(obj) $(bin)
-
-.PHONY: cleandep
-cleandep:
-       rm -f $(dep)
-
-disasm: $(bin)
-       ndisasm -o 0x100 -b 16 $< >$@
diff --git a/Makefile.dos b/Makefile.dos
new file mode 100644 (file)
index 0000000..ca1ee88
--- /dev/null
@@ -0,0 +1,43 @@
+csrc = $(wildcard src/*.c) $(wildcard src/kern/*.c) $(wildcard src/libc/*.c) \
+          $(wildcard src/3dgfx/*.c)
+ssrc = $(wildcard src/*.asm) $(wildcard src/kern/*.asm) $(wildcard src/libc/*.asm)
+obj = $(csrc:.c=.o32) $(ssrc:.asm=.o32)
+dep = $(csrc:.c=.d)
+bin = game.com
+
+warn = -pedantic -Wall -Wno-unused-function
+opt = -O2
+inc = -Isrc -Isrc/3dgfx -Isrc/kern -Isrc/libc
+
+AS = nasm
+
+ASFLAGS = -Isrc/ -Isrc/kern/
+CFLAGS = -m32 -march=i386 $(warn) $(opt) $(dbg) -fno-pic -ffreestanding \
+                -fno-stack-protector -mpreferred-stack-boundary=2 -nostdinc -ffast-math \
+                -fno-asynchronous-unwind-tables -fno-strict-aliasing $(inc) $(def) -MMD
+LDFLAGS = -m elf_i386 -nostdlib -T com32.ld -Map game.map
+
+$(bin): $(obj)
+       $(LD) -o $@ $(obj) $(LDFLAGS)
+
+-include $(dep)
+
+%.o32: %.c
+       $(CC) -o $@ $(CFLAGS) -c $<
+
+%.o32: %.asm
+       $(AS) -o $@ -f elf $(ASFLAGS) $<
+
+%.s: %.c
+       $(CC) $(CFLAGS) -masm=intel -S $< -o $@
+
+.PHONY: clean
+clean:
+       rm -f $(obj) $(bin)
+
+.PHONY: cleandep
+cleandep:
+       rm -f $(dep)
+
+disasm: $(bin)
+       ndisasm -o 0x100 -b 16 $< >$@
diff --git a/Makefile.unix b/Makefile.unix
new file mode 100644 (file)
index 0000000..dfd0e35
--- /dev/null
@@ -0,0 +1,22 @@
+src = $(wildcard src/*.c) $(wildcard src/nondos/*.c) $(wildcard src/3dgfx/*.c)
+obj = $(src:.c=.o)
+dep = $(src:.c=.d)
+bin = game
+
+inc = -Isrc -Isrc/3dgfx -Isrc/kern
+
+CFLAGS = -pedantic -Wall -g $(inc) -MMD
+LDFLAGS = -lGL -lX11 -lXext -lm
+
+$(bin): $(obj)
+       $(CC) -o $@ $(obj) $(LDFLAGS)
+
+-include $(dep)
+
+.PHONY: clean
+clean:
+       rm -f $(obj) $(bin)
+
+.PHONY: cleandep
+cleandep:
+       rm -f $(dep)
index d474993..61e236b 100644 (file)
@@ -44,7 +44,7 @@ int game_init(void)
 
        g3d_matrix_mode(G3D_PROJECTION);
        g3d_load_identity();
-       g3d_perspective(50.0f, 1.33333, 0.5, 500.0);
+       g3d_perspective(60.0f, 1.33333, 0.5, 500.0);
 
        g3d_enable(G3D_CULL_FACE);
        g3d_enable(G3D_DEPTH_TEST);
@@ -97,7 +97,7 @@ static void update(float tsec)
                                x = -BBOX_HSZ + k * VOX_STEP;
 
                                /* initialize with the vertical distance for the pool */
-                               energy = BBOX_HSZ * 0.8 - y;
+                               energy = 5.0 / (y + BBOX_HSZ * 0.98);
 
                                /* add the contribution of the balls */
                                for(n=0; n<num_balls; n++) {
diff --git a/src/nondos/main.c b/src/nondos/main.c
new file mode 100644 (file)
index 0000000..ee861d1
--- /dev/null
@@ -0,0 +1,297 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <assert.h>
+#include "miniglut.h"
+#include "game.h"
+#include "kern/keyb.h"
+
+static void swap_interval(int vsync);
+static void idle(void);
+static void reshape(int x, int y);
+static void keydown(unsigned char key, int x, int y);
+static void keyup(unsigned char key, int x, int y);
+static void skeydown(int key, int x, int y);
+static void skeyup(int key, int x, int y);
+static void mouse(int bn, int st, int x, int y);
+static void motion(int x, int y);
+static int translate_skey(int key);
+static unsigned int next_pow2(unsigned int x);
+
+#if defined(__unix__) || defined(unix)
+#include <GL/glx.h>
+static Display *xdpy;
+static Window xwin;
+
+static void (*glx_swap_interval_ext)();
+static void (*glx_swap_interval_sgi)();
+#endif
+#ifdef _WIN32
+#include <windows.h>
+static PROC wgl_swap_interval_ext;
+#endif
+
+#ifndef GL_BGRA
+#define GL_BGRA        0x80e1
+#endif
+#ifndef GL_CLAMP_TO_EDGE
+#define GL_CLAMP_TO_EDGE       0x812f
+#endif
+
+unsigned char *framebuf;
+static unsigned int tex;
+static int tex_xsz, tex_ysz;
+
+static int win_width, win_height;
+static float win_aspect;
+static float scale = 3;
+static unsigned long start_time;
+static uint32_t cmap[256];
+
+int main(int argc, char **argv)
+{
+       glutInit(&argc, argv);
+
+       glutInitWindowSize(FB_WIDTH * scale, FB_HEIGHT * scale);
+       glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+       glutCreateWindow("metatoy");
+
+       glutDisplayFunc(game_draw);
+       glutIdleFunc(idle);
+       glutReshapeFunc(reshape);
+       glutKeyboardFunc(keydown);
+       glutKeyboardUpFunc(keyup);
+       glutSpecialFunc(skeydown);
+       glutSpecialUpFunc(skeyup);
+       glutMouseFunc(mouse);
+       glutMotionFunc(motion);
+       glutPassiveMotionFunc(motion);
+
+#if defined(__unix__) || defined(unix)
+       xdpy = glXGetCurrentDisplay();
+       xwin = glXGetCurrentDrawable();
+
+       if(!(glx_swap_interval_ext = glXGetProcAddress((unsigned char*)"glXSwapIntervalEXT"))) {
+               glx_swap_interval_sgi = glXGetProcAddress((unsigned char*)"glXSwapIntervalSGI");
+       }
+#endif
+#ifdef _WIN32
+       wgl_swap_interval_ext = wglGetProcAddress("wglSwapIntervalEXT");
+#endif
+       swap_interval(1);
+
+       if(!(framebuf = malloc(FB_WIDTH * FB_HEIGHT))) {
+               fprintf(stderr, "failed to allocate framebuffer\n");
+               return 1;
+       }
+
+       glGenTextures(1, &tex);
+       glBindTexture(GL_TEXTURE_2D, tex);
+       tex_xsz = next_pow2(FB_WIDTH);
+       tex_ysz = next_pow2(FB_HEIGHT);
+       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_xsz, tex_ysz, 0, GL_RGBA,
+                       GL_UNSIGNED_BYTE, 0);
+       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+       glMatrixMode(GL_TEXTURE);
+       glLoadIdentity();
+       glScalef((float)FB_WIDTH / tex_xsz, (float)FB_HEIGHT / tex_ysz, 1);
+       glEnable(GL_TEXTURE_2D);
+
+       if(game_init() == -1) {
+               return 1;
+       }
+       atexit(game_shutdown);
+
+       start_time = glutGet(GLUT_ELAPSED_TIME);
+       glutMainLoop();
+       return 0;
+}
+
+unsigned long game_getmsec(void)
+{
+       return (unsigned long)glutGet(GLUT_ELAPSED_TIME) - start_time;
+}
+
+void game_quit(void)
+{
+       exit(0);
+}
+
+#define FB_ASPECT      ((float)FB_WIDTH / (float)FB_HEIGHT)
+
+void game_swap_buffers(void)
+{
+       int i;
+       static uint32_t fbrgba[FB_WIDTH * FB_HEIGHT * 4];
+
+       for(i=0; i<FB_WIDTH * FB_HEIGHT; i++) {
+               int cidx = framebuf[i];
+               fbrgba[i] = cmap[cidx];
+       }
+
+       glBindTexture(GL_TEXTURE_2D, tex);
+       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, FB_WIDTH, FB_HEIGHT, GL_RGBA,
+                       GL_UNSIGNED_BYTE, fbrgba);
+
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+       if(win_aspect >= FB_ASPECT) {
+               glScalef(FB_ASPECT / win_aspect, 1, 1);
+       } else {
+               glScalef(1, win_aspect / FB_ASPECT, 1);
+       }
+
+       glClear(GL_COLOR_BUFFER_BIT);
+
+       glBegin(GL_QUADS);
+       glTexCoord2f(0, 1);
+       glVertex2f(-1, -1);
+       glTexCoord2f(1, 1);
+       glVertex2f(1, -1);
+       glTexCoord2f(1, 0);
+       glVertex2f(1, 1);
+       glTexCoord2f(0, 0);
+       glVertex2f(-1, 1);
+       glEnd();
+
+       glutSwapBuffers();
+       assert(glGetError() == GL_NO_ERROR);
+}
+
+void vga_setpalent(int idx, int r, int g, int b)
+{
+       cmap[idx] = (b << 16) | (g << 8) | r;
+}
+
+void vga_setpal(int startidx, int count, unsigned char *col)
+{
+       int i, idx = startidx;
+       for(i=0; i<count; i++) {
+               vga_setpalent(idx++, col[0], col[1], col[2]);
+               col += 3;
+       }
+}
+
+void panic(const char *fmt, ...)
+{
+       va_list ap;
+
+       va_start(ap, fmt);
+       vfprintf(stderr, fmt, ap);
+       va_end(ap);
+}
+
+#if defined(__unix__) || defined(unix)
+static void swap_interval(int vsync)
+{
+       vsync = vsync ? 1 : 0;
+       if(glx_swap_interval_ext) {
+               glx_swap_interval_ext(xdpy, xwin, vsync);
+       } else if(glx_swap_interval_sgi) {
+               glx_swap_interval_sgi(vsync);
+       }
+}
+#endif
+#ifdef WIN32
+static void swap_interval(int vsync)
+{
+       if(wgl_swap_interval_ext) {
+               wgl_swap_interval_ext(vsync ? 1 : 0);
+       }
+}
+#endif
+
+static void idle(void)
+{
+       glutPostRedisplay();
+}
+
+static void reshape(int x, int y)
+{
+       win_width = x;
+       win_height = y;
+       win_aspect = (float)x / (float)y;
+       glViewport(0, 0, x, y);
+}
+
+static void keydown(unsigned char key, int x, int y)
+{
+       /*modkeys = glutGetModifiers();*/
+       game_keyboard(key, 1);
+}
+
+static void keyup(unsigned char key, int x, int y)
+{
+       game_keyboard(key, 0);
+}
+
+static void skeydown(int key, int x, int y)
+{
+       int k;
+       /*modkeys = glutGetModifiers();*/
+       if((k = translate_skey(key)) >= 0) {
+               game_keyboard(k, 1);
+       }
+}
+
+static void skeyup(int key, int x, int y)
+{
+       int k = translate_skey(key);
+       if(k >= 0) {
+               game_keyboard(k, 0);
+       }
+}
+
+static void mouse(int bn, int st, int x, int y)
+{
+       /*modkeys = glutGetModifiers();*/
+       game_mouse(bn - GLUT_LEFT_BUTTON, st == GLUT_DOWN, x / scale, y / scale);
+}
+
+static void motion(int x, int y)
+{
+       game_motion(x / scale, y / scale);
+}
+
+static int translate_skey(int key)
+{
+       switch(key) {
+       case GLUT_KEY_LEFT:
+               return KB_LEFT;
+       case GLUT_KEY_UP:
+               return KB_UP;
+       case GLUT_KEY_RIGHT:
+               return KB_RIGHT;
+       case GLUT_KEY_DOWN:
+               return KB_DOWN;
+       case GLUT_KEY_PAGE_UP:
+               return KB_PGUP;
+       case GLUT_KEY_PAGE_DOWN:
+               return KB_PGDN;
+       case GLUT_KEY_HOME:
+               return KB_HOME;
+       case GLUT_KEY_END:
+               return KB_END;
+       case GLUT_KEY_INSERT:
+               return KB_INSERT;
+       default:
+               if(key >= GLUT_KEY_F1 && key <= GLUT_KEY_F12) {
+                       return key - GLUT_KEY_F1 + KB_F1;
+               }
+       }
+
+       return -1;
+}
+
+static unsigned int next_pow2(unsigned int x)
+{
+       x--;
+       x |= x >> 1;
+       x |= x >> 2;
+       x |= x >> 4;
+       x |= x >> 8;
+       x |= x >> 16;
+       return x + 1;
+}
+
diff --git a/src/nondos/miniglut.c b/src/nondos/miniglut.c
new file mode 100644 (file)
index 0000000..16bb7b9
--- /dev/null
@@ -0,0 +1,2667 @@
+/*
+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 '\r';
+       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 glutWarpPointer(int x, int y)
+{
+       XWarpPointer(dpy, None, win, 0, 0, 0, 0, x, y);
+}
+
+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);
+}
+
+static void calc_win_rect(RECT *rect, int x, int y, int w, int h)
+{
+       rect->left = x;
+       rect->top = y;
+       rect->right = x + w;
+       rect->bottom = y + h;
+       AdjustWindowRect(rect, WS_OVERLAPPEDWINDOW, 0);
+}
+
+void glutReshapeWindow(int xsz, int ysz)
+{
+       RECT rect;
+       unsigned int flags = SWP_SHOWWINDOW;
+
+       if(fullscreen) {
+               calc_win_rect(&rect, prev_win_x, prev_win_y, xsz, ysz);
+               SetWindowLong(win, GWL_STYLE, WS_OVERLAPPEDWINDOW);
+               fullscreen = 0;
+               flags |= SWP_FRAMECHANGED;
+       } else {
+               GetWindowRect(win, &rect);
+               calc_win_rect(&rect, rect.left, rect.top, xsz, ysz);
+       }
+
+       xsz = rect.right - rect.left;
+       ysz = rect.bottom - rect.top;
+       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 glutWarpPointer(int x, int y)
+{
+       POINT pt;
+       pt.x = x;
+       pt.y = y;
+
+       ClientToScreen(win, &pt);
+       SetCursorPos(pt.x, pt.y);
+}
+
+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;
+
+       calc_win_rect(&rect, init_x, init_y, init_width, init_height);
+       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();
+}
diff --git a/src/nondos/miniglut.h b/src/nondos/miniglut.h
new file mode 100644 (file)
index 0000000..9eebee0
--- /dev/null
@@ -0,0 +1,207 @@
+/*
+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/>.
+ */
+#ifndef MINIGLUT_H_
+#define MINIGLUT_H_
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+
+#ifdef _MSC_VER
+#pragma comment (lib, "opengl32")
+#ifndef MINIGLUT_NO_WINMM
+#pragma comment (lib, "winmm")
+#endif
+#endif /* MSVC */
+
+#endif
+#include <GL/gl.h>
+
+/* mode flags for glutInitDisplayMode */
+#define GLUT_RGB                       0
+#define GLUT_RGBA                      0
+#define GLUT_INDEX                     0x001
+#define GLUT_SINGLE                    0
+#define GLUT_DOUBLE                    0x002
+#define GLUT_ACCUM                     0x004
+#define GLUT_ALPHA                     0x008
+#define GLUT_DEPTH                     0x010
+#define GLUT_STENCIL           0x020
+#define GLUT_STEREO                    0x040
+#define GLUT_MULTISAMPLE       0x100
+#define GLUT_SRGB                      0x200
+
+enum { GLUT_LEFT_BUTTON, GLUT_MIDDLE_BUTTON, GLUT_RIGHT_BUTTON };
+enum { GLUT_UP, GLUT_DOWN };
+enum { GLUT_NOT_VISIBLE, GLUT_VISIBLE };
+enum { GLUT_LEFT, GLUT_ENTERED };
+
+/* cursors */
+enum {
+       GLUT_CURSOR_INHERIT,
+       GLUT_CURSOR_LEFT_ARROW,
+       GLUT_CURSOR_NONE
+};
+
+/* glutGet */
+enum {
+       GLUT_WINDOW_X,
+       GLUT_WINDOW_Y,
+       GLUT_WINDOW_WIDTH,
+       GLUT_WINDOW_HEIGHT,
+       GLUT_WINDOW_BUFFER_SIZE,
+       GLUT_WINDOW_STENCIL_SIZE,
+       GLUT_WINDOW_DEPTH_SIZE,
+       GLUT_WINDOW_RED_SIZE,
+       GLUT_WINDOW_GREEN_SIZE,
+       GLUT_WINDOW_BLUE_SIZE,
+       GLUT_WINDOW_ALPHA_SIZE,
+       GLUT_WINDOW_DOUBLEBUFFER,
+       GLUT_WINDOW_RGBA,
+       GLUT_WINDOW_NUM_SAMPLES,
+       GLUT_WINDOW_STEREO,
+       GLUT_WINDOW_SRGB,
+       GLUT_WINDOW_CURSOR,
+       GLUT_SCREEN_WIDTH,
+       GLUT_SCREEN_HEIGHT,
+       GLUT_INIT_DISPLAY_MODE,
+       GLUT_INIT_WINDOW_X,
+       GLUT_INIT_WINDOW_Y,
+       GLUT_INIT_WINDOW_WIDTH,
+       GLUT_INIT_WINDOW_HEIGHT,
+       GLUT_ELAPSED_TIME,
+       GLUT_WINDOW_COLORMAP_SIZE
+};
+
+enum {
+       GLUT_RED,
+       GLUT_GREEN,
+       GLUT_BLUE
+};
+
+enum {
+       GLUT_KEY_HOME = 0xff50,
+       GLUT_KEY_LEFT = 0xff51,
+       GLUT_KEY_UP,
+       GLUT_KEY_RIGHT,
+       GLUT_KEY_DOWN,
+       GLUT_KEY_PAGE_UP,
+       GLUT_KEY_PAGE_DOWN,
+       GLUT_KEY_END = 0xff57,
+       GLUT_KEY_INSERT = 0xff63,
+       GLUT_KEY_F1 = 0xffbe,
+       GLUT_KEY_F2,
+       GLUT_KEY_F3,
+       GLUT_KEY_F4,
+       GLUT_KEY_F5,
+       GLUT_KEY_F6,
+       GLUT_KEY_F7,
+       GLUT_KEY_F8,
+       GLUT_KEY_F9,
+       GLUT_KEY_F10,
+       GLUT_KEY_F11,
+       GLUT_KEY_F12
+};
+
+/* returned by glutGetModifiers */
+#define GLUT_ACTIVE_SHIFT      1
+#define GLUT_ACTIVE_CTRL       4
+#define GLUT_ACTIVE_ALT                8
+
+enum {
+       GLUT_KEY_REPEAT_OFF,
+       GLUT_KEY_REPEAT_ON
+};
+#define GLUT_KEY_REPEAT_DEFAULT GLUT_KEY_REPEAT_ON
+
+typedef void (*glut_cb)(void);
+typedef void (*glut_cb_reshape)(int x, int y);
+typedef void (*glut_cb_state)(int state);
+typedef void (*glut_cb_keyb)(unsigned char key, int x, int y);
+typedef void (*glut_cb_special)(int key, int x, int y);
+typedef void (*glut_cb_mouse)(int bn, int state, int x, int y);
+typedef void (*glut_cb_motion)(int x, int y);
+typedef void (*glut_cb_sbmotion)(int x, int y, int z);
+typedef void (*glut_cb_sbbutton)(int bn, int state);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void glutInit(int *argc, char **argv);
+void glutInitWindowPosition(int x, int y);
+void glutInitWindowSize(int xsz, int ysz);
+void glutInitDisplayMode(unsigned int mode);
+void glutCreateWindow(const char *title);
+
+void glutExit(void);
+void glutMainLoop(void);
+void glutMainLoopEvent(void);
+
+void glutPostRedisplay(void);
+void glutSwapBuffers(void);
+void glutPositionWindow(int x, int y);
+void glutReshapeWindow(int xsz, int ysz);
+void glutFullScreen(void);
+void glutSetWindowTitle(const char *title);
+void glutSetIconTitle(const char *title);
+void glutSetCursor(int cursor);
+void glutSetColor(int idx, float r, float g, float b);
+void glutWarpPointer(int x, int y);
+float glutGetColor(int idx, int comp);
+
+void glutIgnoreKeyRepeat(int ignore);
+void glutSetKeyRepeat(int repmode);
+
+void glutIdleFunc(glut_cb func);
+void glutDisplayFunc(glut_cb func);
+void glutReshapeFunc(glut_cb_reshape func);
+void glutVisibilityFunc(glut_cb_state func);
+void glutEntryFunc(glut_cb_state func);
+void glutKeyboardFunc(glut_cb_keyb func);
+void glutKeyboardUpFunc(glut_cb_keyb func);
+void glutSpecialFunc(glut_cb_special func);
+void glutSpecialUpFunc(glut_cb_special func);
+void glutMouseFunc(glut_cb_mouse func);
+void glutMotionFunc(glut_cb_motion func);
+void glutPassiveMotionFunc(glut_cb_motion func);
+void glutSpaceballMotionFunc(glut_cb_sbmotion func);
+void glutSpaceballRotateFunc(glut_cb_sbmotion func);
+void glutSpaceballButtonFunc(glut_cb_sbbutton func);
+
+int glutGet(unsigned int s);
+int glutGetModifiers(void);
+int glutExtensionSupported(char *ext);
+
+void glutSolidSphere(float rad, int slices, int stacks);
+void glutWireSphere(float rad, int slices, int stacks);
+void glutSolidCube(float sz);
+void glutWireCube(float sz);
+void glutSolidCone(float base, float height, int slices, int stacks);
+void glutWireCone(float base, float height, int slices, int stacks);
+void glutSolidCylinder(float rad, float height, int slices, int stacks);
+void glutSolidTorus(float inner_rad, float outer_rad, int sides, int rings);
+void glutWireTorus(float inner_rad, float outer_rad, int sides, int rings);
+void glutSolidTeapot(float size);
+void glutWireTeapot(float size);
+
+#ifdef __cplusplus
+}      /* extern "C" */
+#endif
+
+#endif /* MINIGLUT_H_ */