eqemu

annotate src/main.cc @ 1:374d91dd2996

find changesets by author, revision, files, or words in the commit message
foo
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 15 Jul 2014 05:44:26 +0300
parents 01fb0dee8a92
children 48dce4ee4850
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <assert.h>
nuclear@0 4 #include <errno.h>
nuclear@0 5 #include <unistd.h>
nuclear@0 6 #include <sys/select.h>
nuclear@0 7 #include <GL/glew.h>
nuclear@0 8 #include <X11/Xlib.h>
nuclear@0 9 #include <GL/glx.h>
nuclear@1 10 #include "dev.h"
nuclear@0 11
nuclear@0 12 static bool init();
nuclear@0 13 static void cleanup();
nuclear@0 14 static void display();
nuclear@0 15 static void keyb(int key, bool pressed);
nuclear@0 16 static void mouse(int bn, bool pressed, int x, int y);
nuclear@0 17 static void motion(int x, int y);
nuclear@0 18
nuclear@0 19 static Window create_window(const char *title, int xsz, int ysz);
nuclear@0 20 static void process_events();
nuclear@0 21 static int translate_keysym(KeySym sym);
nuclear@0 22
nuclear@0 23 static Display *dpy;
nuclear@0 24 static Window win;
nuclear@0 25 static GLXContext ctx;
nuclear@0 26 static Atom xa_wm_prot, xa_wm_del_win;
nuclear@0 27
nuclear@0 28 static int win_width, win_height;
nuclear@0 29
nuclear@0 30 static bool redisplay_pending;
nuclear@0 31 static bool win_mapped;
nuclear@0 32
nuclear@0 33 int main()
nuclear@0 34 {
nuclear@0 35 if(!init()) {
nuclear@0 36 fprintf(stderr, "X11/OpenGL initialization failed\n");
nuclear@0 37 return 1;
nuclear@0 38 }
nuclear@0 39 atexit(cleanup);
nuclear@0 40
nuclear@0 41 int xfd = ConnectionNumber(dpy);
nuclear@0 42
nuclear@0 43 for(;;) {
nuclear@0 44 fd_set rd;
nuclear@0 45 FD_ZERO(&rd);
nuclear@0 46
nuclear@0 47 FD_SET(xfd, &rd);
nuclear@0 48
nuclear@0 49 while(select(xfd + 1, &rd, 0, 0, 0) == -1 && errno == EINTR);
nuclear@0 50
nuclear@0 51 if(FD_ISSET(xfd, &rd)) {
nuclear@0 52 process_events();
nuclear@0 53 }
nuclear@0 54
nuclear@0 55 if(redisplay_pending) {
nuclear@0 56 display();
nuclear@0 57 redisplay_pending = false;
nuclear@0 58 }
nuclear@0 59 }
nuclear@0 60 return 0;
nuclear@0 61 }
nuclear@0 62
nuclear@0 63 static bool init()
nuclear@0 64 {
nuclear@1 65 start_dev();
nuclear@1 66
nuclear@0 67 if(!(dpy = XOpenDisplay(0))) {
nuclear@0 68 fprintf(stderr, "failed to connect to the X server!\n");
nuclear@0 69 return false;
nuclear@0 70 }
nuclear@0 71
nuclear@0 72 if(!(win = create_window("dummy equeue device", 800, 600))) {
nuclear@0 73 return false;
nuclear@0 74 }
nuclear@0 75
nuclear@0 76 return true;
nuclear@0 77 }
nuclear@0 78
nuclear@0 79 static void cleanup()
nuclear@0 80 {
nuclear@1 81 stop_dev();
nuclear@1 82
nuclear@0 83 if(!dpy) return;
nuclear@0 84
nuclear@0 85 if(win) {
nuclear@0 86 XDestroyWindow(dpy, win);
nuclear@0 87 }
nuclear@0 88 XCloseDisplay(dpy);
nuclear@0 89 }
nuclear@0 90
nuclear@0 91 static void display()
nuclear@0 92 {
nuclear@0 93 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 94
nuclear@0 95 glMatrixMode(GL_MODELVIEW);
nuclear@0 96 glLoadIdentity();
nuclear@0 97
nuclear@0 98 glXSwapBuffers(dpy, win);
nuclear@0 99 assert(glGetError() == GL_NO_ERROR);
nuclear@0 100 }
nuclear@0 101
nuclear@0 102 static void reshape(int x, int y)
nuclear@0 103 {
nuclear@0 104 glViewport(0, 0, x, y);
nuclear@0 105
nuclear@0 106 glMatrixMode(GL_PROJECTION);
nuclear@0 107 glLoadIdentity();
nuclear@0 108 gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
nuclear@0 109 }
nuclear@0 110
nuclear@0 111 static void keyb(int key, bool pressed)
nuclear@0 112 {
nuclear@0 113 if(pressed) {
nuclear@0 114 switch(key) {
nuclear@0 115 case 27:
nuclear@0 116 exit(0);
nuclear@0 117 }
nuclear@0 118 }
nuclear@0 119 }
nuclear@0 120
nuclear@0 121 static void mouse(int bn, bool pressed, int x, int y)
nuclear@0 122 {
nuclear@0 123 }
nuclear@0 124
nuclear@0 125 static void motion(int x, int y)
nuclear@0 126 {
nuclear@0 127 }
nuclear@0 128
nuclear@0 129 static Window create_window(const char *title, int xsz, int ysz)
nuclear@0 130 {
nuclear@0 131 int scr = DefaultScreen(dpy);
nuclear@0 132 Window root = RootWindow(dpy, scr);
nuclear@0 133
nuclear@0 134 int glxattr[] = {
nuclear@0 135 GLX_RGBA,
nuclear@0 136 GLX_RED_SIZE, 8,
nuclear@0 137 GLX_GREEN_SIZE, 8,
nuclear@0 138 GLX_BLUE_SIZE, 8,
nuclear@0 139 GLX_DEPTH_SIZE, 24,
nuclear@0 140 GLX_DOUBLEBUFFER,
nuclear@0 141 #if defined(GLX_VERSION_1_4) || defined(GLX_ARB_multisample)
nuclear@0 142 GLX_SAMPLE_BUFFERS_ARB, 1,
nuclear@0 143 GLX_SAMPLES_ARB, 1,
nuclear@0 144 #endif
nuclear@0 145 None
nuclear@0 146 };
nuclear@0 147
nuclear@0 148 XVisualInfo *vis = glXChooseVisual(dpy, scr, glxattr);
nuclear@0 149 if(!vis) {
nuclear@0 150 fprintf(stderr, "failed to find a suitable visual\n");
nuclear@0 151 return 0;
nuclear@0 152 }
nuclear@0 153
nuclear@0 154 if(!(ctx = glXCreateContext(dpy, vis, 0, True))) {
nuclear@0 155 fprintf(stderr, "failed to create OpenGL context\n");
nuclear@0 156 XFree(vis);
nuclear@0 157 return -1;
nuclear@0 158 }
nuclear@0 159
nuclear@0 160 XSetWindowAttributes xattr;
nuclear@0 161 xattr.background_pixel = xattr.border_pixel = BlackPixel(dpy, scr);
nuclear@0 162 xattr.colormap = XCreateColormap(dpy, root, vis->visual, AllocNone);
nuclear@0 163 unsigned int xattr_mask = CWColormap | CWBackPixel | CWBorderPixel;
nuclear@0 164
nuclear@0 165 Window win = XCreateWindow(dpy, root, 0, 0, xsz, ysz, 0, vis->depth, InputOutput,
nuclear@0 166 vis->visual, xattr_mask, &xattr);
nuclear@0 167 if(!win) {
nuclear@0 168 fprintf(stderr, "failed to create window\n");
nuclear@0 169 glXDestroyContext(dpy, ctx);
nuclear@0 170 XFree(vis);
nuclear@0 171 return -1;
nuclear@0 172 }
nuclear@0 173 XFree(vis);
nuclear@0 174
nuclear@0 175 unsigned int evmask = StructureNotifyMask | VisibilityChangeMask | ExposureMask |
nuclear@0 176 KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
nuclear@0 177 ButtonMotionMask | PointerMotionMask;
nuclear@0 178 XSelectInput(dpy, win, evmask);
nuclear@0 179
nuclear@0 180 xa_wm_prot = XInternAtom(dpy, "WM_PROTOCOLS", False);
nuclear@0 181 xa_wm_del_win = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
nuclear@0 182 XSetWMProtocols(dpy, win, &xa_wm_del_win, 1);
nuclear@0 183
nuclear@0 184 XClassHint hint;
nuclear@0 185 hint.res_name = hint.res_class = (char*)"equeue_win";
nuclear@0 186 XSetClassHint(dpy, win, &hint);
nuclear@0 187
nuclear@0 188 XTextProperty wm_name;
nuclear@0 189 XStringListToTextProperty((char**)&title, 1, &wm_name);
nuclear@0 190 XSetWMName(dpy, win, &wm_name);
nuclear@0 191 XSetWMIconName(dpy, win, &wm_name);
nuclear@0 192 XFree(wm_name.value);
nuclear@0 193
nuclear@0 194 XMapWindow(dpy, win);
nuclear@0 195 glXMakeCurrent(dpy, win, ctx);
nuclear@0 196
nuclear@0 197 return win;
nuclear@0 198 }
nuclear@0 199
nuclear@0 200 static void process_events()
nuclear@0 201 {
nuclear@0 202 XEvent ev;
nuclear@0 203
nuclear@0 204 while(XPending(dpy)) {
nuclear@0 205 XNextEvent(dpy, &ev);
nuclear@0 206 switch(ev.type) {
nuclear@0 207 case MapNotify:
nuclear@0 208 win_mapped = true;
nuclear@0 209 break;
nuclear@0 210
nuclear@0 211 case UnmapNotify:
nuclear@0 212 win_mapped = false;
nuclear@0 213 break;
nuclear@0 214
nuclear@0 215 case Expose:
nuclear@0 216 if(win_mapped && ev.xexpose.count == 0) {
nuclear@0 217 redisplay_pending = 1;
nuclear@0 218 }
nuclear@0 219 break;
nuclear@0 220
nuclear@0 221 case MotionNotify:
nuclear@0 222 motion(ev.xmotion.x, ev.xmotion.y);
nuclear@0 223 break;
nuclear@0 224
nuclear@0 225 case ButtonPress:
nuclear@0 226 mouse(ev.xbutton.button - 1, true, ev.xbutton.x, ev.xbutton.y);
nuclear@0 227 break;
nuclear@0 228
nuclear@0 229 case ButtonRelease:
nuclear@0 230 mouse(ev.xbutton.button - 1, false, ev.xbutton.x, ev.xbutton.y);
nuclear@0 231 break;
nuclear@0 232
nuclear@0 233 case KeyPress:
nuclear@0 234 {
nuclear@0 235 KeySym sym = XLookupKeysym(&ev.xkey, 0);
nuclear@0 236 keyb(translate_keysym(sym), true);
nuclear@0 237 }
nuclear@0 238 break;
nuclear@0 239
nuclear@0 240 case KeyRelease:
nuclear@0 241 {
nuclear@0 242 KeySym sym = XLookupKeysym(&ev.xkey, 0);
nuclear@0 243 keyb(translate_keysym(sym), false);
nuclear@0 244 }
nuclear@0 245 break;
nuclear@0 246
nuclear@0 247 case ConfigureNotify:
nuclear@0 248 {
nuclear@0 249 int xsz = ev.xconfigure.width;
nuclear@0 250 int ysz = ev.xconfigure.height;
nuclear@0 251
nuclear@0 252 if(xsz != win_width || ysz != win_height) {
nuclear@0 253 win_width = xsz;
nuclear@0 254 win_height = ysz;
nuclear@0 255 reshape(xsz, ysz);
nuclear@0 256 }
nuclear@0 257 }
nuclear@0 258 break;
nuclear@0 259
nuclear@0 260 case ClientMessage:
nuclear@0 261 if(ev.xclient.message_type == xa_wm_prot) {
nuclear@0 262 if((Atom)ev.xclient.data.l[0] == xa_wm_del_win) {
nuclear@0 263 exit(0);
nuclear@0 264 }
nuclear@0 265 }
nuclear@0 266 break;
nuclear@0 267
nuclear@0 268 default:
nuclear@0 269 break;
nuclear@0 270 }
nuclear@0 271
nuclear@0 272 }
nuclear@0 273 }
nuclear@0 274
nuclear@0 275 static int translate_keysym(KeySym sym)
nuclear@0 276 {
nuclear@0 277 switch(sym) {
nuclear@0 278 case XK_BackSpace:
nuclear@0 279 return '\b';
nuclear@0 280 case XK_Tab:
nuclear@0 281 return '\t';
nuclear@0 282 case XK_Linefeed:
nuclear@0 283 return '\r';
nuclear@0 284 case XK_Return:
nuclear@0 285 return '\n';
nuclear@0 286 case XK_Escape:
nuclear@0 287 return 27;
nuclear@0 288 default:
nuclear@0 289 break;
nuclear@0 290 }
nuclear@0 291 return (int)sym;
nuclear@0 292 }