progs/egl/xeglgears.c

   1 /*
   2  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 /*
  23  * Ported to X/EGL/GLES.   XXX Actually, uses full OpenGL ATM.
  24  * Brian Paul
  25  * 30 May 2008
  26  */
  27
  28 /*
  29  * Command line options:
  30  *    -info      print GL implementation information
  31  *
  32  */
  33
  34
  35 #define GL_GLEXT_PROTOTYPES
  36 #define EGL_EGLEXT_PROTOTYPES
  37
  38 #include <math.h>
  39 #include <stdlib.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <X11/Xlib.h>
  43 #include <X11/Xutil.h>
  44 #include <X11/keysym.h>
  45 #include <GL/gl.h>
  46 #include <EGL/egl.h>
  47
  48 #include <EGL/eglext.h>
  49
  50
  51 #define BENCHMARK
  52
  53 #ifdef BENCHMARK
  54
  55 /* XXX this probably isn't very portable */
  56
  57 #include <sys/time.h>
  58 #include <unistd.h>
  59
  60 /* return current time (in seconds) */
  61 static double
  62 current_time(void)
  63 {
  64    struct timeval tv;
  65 #ifdef __VMS
  66    (void) gettimeofday(&tv, NULL );
  67 #else
  68    struct timezone tz;
  69    (void) gettimeofday(&tv, &tz);
  70 #endif
  71    return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
  72 }
  73
  74 #else /*BENCHMARK*/
  75
  76 /* dummy */
  77 static double
  78 current_time(void)
  79 {
  80    /* update this function for other platforms! */
  81    static double t = 0.0;
  82    static int warn = 1;
  83    if (warn) {
  84       fprintf(stderr, "Warning: current_time() not implemented!!\n");
  85       warn = 0;
  86    }
  87    return t += 1.0;
  88 }
  89
  90 #endif /*BENCHMARK*/
  91
  92
  93
  94 #ifndef M_PI
  95 #define M_PI 3.14159265
  96 #endif
  97
  98
  99 static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
 100 static GLint gear1, gear2, gear3;
 101 static GLfloat angle = 0.0;
 102
 103 /*
 104  *
 105  *  Draw a gear wheel.  You'll probably want to call this function when
 106  *  building a display list since we do a lot of trig here.
 107  *
 108  *  Input:  inner_radius - radius of hole at center
 109  *          outer_radius - radius at center of teeth
 110  *          width - width of gear
 111  *          teeth - number of teeth
 112  *          tooth_depth - depth of tooth
 113  */
 114 static void
 115 gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
 116      GLint teeth, GLfloat tooth_depth)
 117 {
 118    GLint i;
 119    GLfloat r0, r1, r2;
 120    GLfloat angle, da;
 121    GLfloat u, v, len;
 122
 123    r0 = inner_radius;
 124    r1 = outer_radius - tooth_depth / 2.0;
 125    r2 = outer_radius + tooth_depth / 2.0;
 126
 127    da = 2.0 * M_PI / teeth / 4.0;
 128
 129    glShadeModel(GL_FLAT);
 130
 131    glNormal3f(0.0, 0.0, 1.0);
 132
 133    /* draw front face */
 134    glBegin(GL_QUAD_STRIP);
 135    for (i = 0; i <= teeth; i++) {
 136       angle = i * 2.0 * M_PI / teeth;
 137       glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
 138       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
 139       if (i < teeth) {
 140          glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
 141          glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 142                     width * 0.5);
 143       }
 144    }
 145    glEnd();
 146
 147    /* draw front sides of teeth */
 148    glBegin(GL_QUADS);
 149    da = 2.0 * M_PI / teeth / 4.0;
 150    for (i = 0; i < teeth; i++) {
 151       angle = i * 2.0 * M_PI / teeth;
 152
 153       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
 154       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
 155       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
 156                  width * 0.5);
 157       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 158                  width * 0.5);
 159    }
 160    glEnd();
 161
 162    glNormal3f(0.0, 0.0, -1.0);
 163
 164    /* draw back face */
 165    glBegin(GL_QUAD_STRIP);
 166    for (i = 0; i <= teeth; i++) {
 167       angle = i * 2.0 * M_PI / teeth;
 168       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
 169       glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
 170       if (i < teeth) {
 171          glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 172                     -width * 0.5);
 173          glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
 174       }
 175    }
 176    glEnd();
 177
 178    /* draw back sides of teeth */
 179    glBegin(GL_QUADS);
 180    da = 2.0 * M_PI / teeth / 4.0;
 181    for (i = 0; i < teeth; i++) {
 182       angle = i * 2.0 * M_PI / teeth;
 183
 184       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 185                  -width * 0.5);
 186       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
 187                  -width * 0.5);
 188       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
 189       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
 190    }
 191    glEnd();
 192
 193    /* draw outward faces of teeth */
 194    glBegin(GL_QUAD_STRIP);
 195    for (i = 0; i < teeth; i++) {
 196       angle = i * 2.0 * M_PI / teeth;
 197
 198       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
 199       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
 200       u = r2 * cos(angle + da) - r1 * cos(angle);
 201       v = r2 * sin(angle + da) - r1 * sin(angle);
 202       len = sqrt(u * u + v * v);
 203       u /= len;
 204       v /= len;
 205       glNormal3f(v, -u, 0.0);
 206       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
 207       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
 208       glNormal3f(cos(angle), sin(angle), 0.0);
 209       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
 210                  width * 0.5);
 211       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
 212                  -width * 0.5);
 213       u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
 214       v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
 215       glNormal3f(v, -u, 0.0);
 216       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 217                  width * 0.5);
 218       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
 219                  -width * 0.5);
 220       glNormal3f(cos(angle), sin(angle), 0.0);
 221    }
 222
 223    glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
 224    glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
 225
 226    glEnd();
 227
 228    glShadeModel(GL_SMOOTH);
 229
 230    /* draw inside radius cylinder */
 231    glBegin(GL_QUAD_STRIP);
 232    for (i = 0; i <= teeth; i++) {
 233       angle = i * 2.0 * M_PI / teeth;
 234       glNormal3f(-cos(angle), -sin(angle), 0.0);
 235       glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
 236       glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
 237    }
 238    glEnd();
 239 }
 240
 241
 242 static void
 243 draw(void)
 244 {
 245    glClearColor(0.2, 0.2, 0.2, 0.2);
 246    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 247
 248    glPushMatrix();
 249    glRotatef(view_rotx, 1.0, 0.0, 0.0);
 250    glRotatef(view_roty, 0.0, 1.0, 0.0);
 251    glRotatef(view_rotz, 0.0, 0.0, 1.0);
 252
 253    glPushMatrix();
 254    glTranslatef(-3.0, -2.0, 0.0);
 255    glRotatef(angle, 0.0, 0.0, 1.0);
 256    glCallList(gear1);
 257    glPopMatrix();
 258
 259    glPushMatrix();
 260    glTranslatef(3.1, -2.0, 0.0);
 261    glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
 262    glCallList(gear2);
 263    glPopMatrix();
 264
 265    glPushMatrix();
 266    glTranslatef(-3.1, 4.2, 0.0);
 267    glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
 268    glCallList(gear3);
 269    glPopMatrix();
 270
 271    glPopMatrix();
 272 }
 273
 274
 275 /* new window size or exposure */
 276 static void
 277 reshape(int width, int height)
 278 {
 279    GLfloat ar = (GLfloat) width / (GLfloat) height;
 280
 281    glViewport(0, 0, (GLint) width, (GLint) height);
 282
 283    glMatrixMode(GL_PROJECTION);
 284    glLoadIdentity();
 285    glFrustum(-ar, ar, -1, 1, 5.0, 60.0);
 286
 287    glMatrixMode(GL_MODELVIEW);
 288    glLoadIdentity();
 289    glTranslatef(0.0, 0.0, -40.0);
 290 }
 291
 292
 293
 294 static void
 295 init(void)
 296 {
 297    static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
 298    static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
 299    static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
 300    static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
 301
 302    glLightfv(GL_LIGHT0, GL_POSITION, pos);
 303    glEnable(GL_CULL_FACE);
 304    glEnable(GL_LIGHTING);
 305    glEnable(GL_LIGHT0);
 306    glEnable(GL_DEPTH_TEST);
 307
 308    /* make the gears */
 309    gear1 = glGenLists(1);
 310    glNewList(gear1, GL_COMPILE);
 311    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
 312    gear(1.0, 4.0, 1.0, 20, 0.7);
 313    glEndList();
 314
 315    gear2 = glGenLists(1);
 316    glNewList(gear2, GL_COMPILE);
 317    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
 318    gear(0.5, 2.0, 2.0, 10, 0.7);
 319    glEndList();
 320
 321    gear3 = glGenLists(1);
 322    glNewList(gear3, GL_COMPILE);
 323    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
 324    gear(1.3, 2.0, 0.5, 10, 0.7);
 325    glEndList();
 326
 327    glEnable(GL_NORMALIZE);
 328 }
 329
 330
 331 struct egl_manager {
 332    EGLNativeDisplayType xdpy;
 333    EGLNativeWindowType xwin;
 334    EGLNativePixmapType xpix;
 335
 336    EGLDisplay dpy;
 337    EGLConfig conf;
 338    EGLContext ctx;
 339
 340    EGLSurface win;
 341    EGLSurface pix;
 342    EGLSurface pbuf;
 343    EGLImageKHR image;
 344
 345    EGLBoolean verbose;
 346    EGLint major, minor;
 347
 348    GC gc;
 349    GLuint fbo;
 350 };
 351
 352 static struct egl_manager *
 353 egl_manager_new(EGLNativeDisplayType xdpy, const EGLint *attrib_list,
 354                 EGLBoolean verbose)
 355 {
 356    struct egl_manager *eman;
 357    const char *ver;
 358    EGLint num_conf;
 359
 360    eman = calloc(1, sizeof(*eman));
 361    if (!eman)
 362       return NULL;
 363
 364    eman->verbose = verbose;
 365    eman->xdpy = xdpy;
 366
 367    eman->dpy = eglGetDisplay(eman->xdpy);
 368    if (eman->dpy == EGL_NO_DISPLAY) {
 369       printf("eglGetDisplay() failed\n");
 370       free(eman);
 371       return NULL;
 372    }
 373
 374    if (!eglInitialize(eman->dpy, &eman->major, &eman->minor)) {
 375       printf("eglInitialize() failed\n");
 376       free(eman);
 377       return NULL;
 378    }
 379
 380    ver = eglQueryString(eman->dpy, EGL_VERSION);
 381    printf("EGL_VERSION = %s\n", ver);
 382
 383    if (!eglChooseConfig(eman->dpy, attrib_list, &eman->conf, 1, &num_conf) ||
 384        !num_conf) {
 385       printf("eglChooseConfig() failed\n");
 386       eglTerminate(eman->dpy);
 387       free(eman);
 388       return NULL;
 389    }
 390
 391    eman->ctx = eglCreateContext(eman->dpy, eman->conf, EGL_NO_CONTEXT, NULL);
 392    if (eman->ctx == EGL_NO_CONTEXT) {
 393       printf("eglCreateContext() failed\n");
 394       eglTerminate(eman->dpy);
 395       free(eman);
 396       return NULL;
 397    }
 398
 399    return eman;
 400 }
 401
 402 static EGLBoolean
 403 egl_manager_create_window(struct egl_manager *eman, const char *name,
 404                           EGLint w, EGLint h, EGLBoolean need_surface,
 405                           EGLBoolean fullscreen, const EGLint *attrib_list)
 406 {
 407    XVisualInfo vinfo_template, *vinfo = NULL;
 408    EGLint val, num_vinfo;
 409    Window root;
 410    XSetWindowAttributes attrs;
 411    unsigned long mask;
 412    EGLint x = 0, y = 0;
 413
 414    if (!eglGetConfigAttrib(eman->dpy, eman->conf,
 415                            EGL_NATIVE_VISUAL_ID, &val)) {
 416       printf("eglGetConfigAttrib() failed\n");
 417       return EGL_FALSE;
 418    }
 419    if (val) {
 420       vinfo_template.visualid = (VisualID) val;
 421       vinfo = XGetVisualInfo(eman->xdpy, VisualIDMask, &vinfo_template, &num_vinfo);
 422    }
 423    /* try harder if window surface is not needed */
 424    if (!vinfo && !need_surface &&
 425        eglGetConfigAttrib(eman->dpy, eman->conf, EGL_BUFFER_SIZE, &val)) {
 426       if (val == 32)
 427          val = 24;
 428       vinfo_template.depth = val;
 429       vinfo = XGetVisualInfo(eman->xdpy, VisualDepthMask, &vinfo_template, &num_vinfo);
 430    }
 431
 432    if (!vinfo) {
 433       printf("XGetVisualInfo() failed\n");
 434       return EGL_FALSE;
 435    }
 436
 437    root = DefaultRootWindow(eman->xdpy);
 438    if (fullscreen) {
 439       x = y = 0;
 440       w = DisplayWidth(eman->xdpy, DefaultScreen(eman->xdpy));
 441       h = DisplayHeight(eman->xdpy, DefaultScreen(eman->xdpy));
 442    }
 443
 444    /* window attributes */
 445    attrs.background_pixel = 0;
 446    attrs.border_pixel = 0;
 447    attrs.colormap = XCreateColormap(eman->xdpy, root, vinfo->visual, AllocNone);
 448    attrs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
 449    attrs.override_redirect = fullscreen;
 450    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
 451
 452    eman->xwin = XCreateWindow(eman->xdpy, root, x, y, w, h,
 453                               0, vinfo->depth, InputOutput,
 454                               vinfo->visual, mask, &attrs);
 455    XFree(vinfo);
 456
 457    /* set hints and properties */
 458    {
 459       XSizeHints sizehints;
 460       sizehints.x = x;
 461       sizehints.y = y;
 462       sizehints.width  = w;
 463       sizehints.height = h;
 464       sizehints.flags = USSize | USPosition;
 465       XSetNormalHints(eman->xdpy, eman->xwin, &sizehints);
 466       XSetStandardProperties(eman->xdpy, eman->xwin, name, name,
 467                              None, (char **)NULL, 0, &sizehints);
 468    }
 469
 470    if (need_surface) {
 471       eman->win = eglCreateWindowSurface(eman->dpy, eman->conf,
 472                                          eman->xwin, attrib_list);
 473       if (eman->win == EGL_NO_SURFACE) {
 474          printf("eglCreateWindowSurface() failed\n");
 475          XDestroyWindow(eman->xdpy, eman->xwin);
 476          eman->xwin = None;
 477          return EGL_FALSE;
 478       }
 479    }
 480
 481    eman->gc = XCreateGC(eman->xdpy, eman->xwin, 0, NULL);
 482
 483    XMapWindow(eman->xdpy, eman->xwin);
 484
 485    return EGL_TRUE;
 486 }
 487
 488 static EGLBoolean
 489 egl_manager_create_pixmap(struct egl_manager *eman, EGLNativeWindowType xwin,
 490                           EGLBoolean need_surface, const EGLint *attrib_list)
 491 {
 492    XWindowAttributes attrs;
 493
 494    if (!XGetWindowAttributes(eman->xdpy, xwin, &attrs)) {
 495       printf("XGetWindowAttributes() failed\n");
 496       return EGL_FALSE;
 497    }
 498
 499    eman->xpix = XCreatePixmap(eman->xdpy, xwin,
 500                               attrs.width, attrs.height, attrs.depth);
 501
 502    if (need_surface) {
 503       eman->pix = eglCreatePixmapSurface(eman->dpy, eman->conf,
 504                                          eman->xpix, attrib_list);
 505       if (eman->pix == EGL_NO_SURFACE) {
 506          printf("eglCreatePixmapSurface() failed\n");
 507          XFreePixmap(eman->xdpy, eman->xpix);
 508          eman->xpix = None;
 509          return EGL_FALSE;
 510       }
 511    }
 512
 513    return EGL_TRUE;
 514 }
 515
 516 static EGLBoolean
 517 egl_manager_create_pbuffer(struct egl_manager *eman, const EGLint *attrib_list)
 518 {
 519    eman->pbuf = eglCreatePbufferSurface(eman->dpy, eman->conf, attrib_list);
 520    if (eman->pbuf == EGL_NO_SURFACE) {
 521       printf("eglCreatePbufferSurface() failed\n");
 522       return EGL_FALSE;
 523    }
 524
 525    return EGL_TRUE;
 526 }
 527
 528 static void
 529 egl_manager_destroy(struct egl_manager *eman)
 530 {
 531    eglMakeCurrent(eman->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 532    eglTerminate(eman->dpy);
 533
 534    if (eman->xwin != None)
 535       XDestroyWindow(eman->xdpy, eman->xwin);
 536    if (eman->xpix != None)
 537       XFreePixmap(eman->xdpy, eman->xpix);
 538
 539    XFreeGC(eman->xdpy, eman->gc);
 540
 541    free(eman);
 542 }
 543
 544 enum {
 545    GEARS_WINDOW,
 546    GEARS_PIXMAP,
 547    GEARS_PIXMAP_TEXTURE,
 548    GEARS_PBUFFER,
 549    GEARS_PBUFFER_TEXTURE,
 550    GEARS_RENDERBUFFER
 551 };
 552
 553 static void
 554 texture_gears(struct egl_manager *eman, int surface_type)
 555 {
 556    static const GLint verts[12] =
 557       { -5, -6, -10,  5, -6, -10,  -5, 4, 10,  5, 4, 10 };
 558    static const GLint tex_coords[8] = { 0, 0,  1, 0,  0, 1,  1, 1 };
 559
 560    eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
 561
 562    glClearColor(0, 0, 0, 0);
 563    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 564
 565    glEnable(GL_TEXTURE_2D);
 566    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 567    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
 568    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 569    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 570
 571    glEnableClientState(GL_VERTEX_ARRAY);
 572    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 573    glVertexPointer(3, GL_INT, 0, verts);
 574    glTexCoordPointer(2, GL_INT, 0, tex_coords);
 575
 576    if (surface_type == GEARS_PBUFFER_TEXTURE)
 577       eglBindTexImage(eman->dpy, eman->pbuf, EGL_BACK_BUFFER);
 578
 579    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 580
 581    glDisableClientState(GL_VERTEX_ARRAY);
 582    glDisableClientState(GL_COLOR_ARRAY);
 583    glDisable(GL_TEXTURE_2D);
 584
 585    if (surface_type == GEARS_PBUFFER_TEXTURE)
 586       eglReleaseTexImage(eman->dpy, eman->pbuf, EGL_BACK_BUFFER);
 587
 588    eglSwapBuffers(eman->dpy, eman->win);
 589 }
 590
 591 static void
 592 copy_gears(struct egl_manager *eman,
 593            EGLint tile_w, EGLint tile_h, EGLint w, EGLint h)
 594 {
 595    int x, y;
 596
 597    eglWaitClient();
 598
 599    for (x = 0; x < w; x += tile_w) {
 600       for (y = 0; y < h; y += tile_h) {
 601
 602          XCopyArea(eman->xdpy, eman->xpix, eman->xwin, eman->gc,
 603                    0, 0, tile_w, tile_h, x, y);
 604       }
 605    }
 606 }
 607
 608 static void
 609 event_loop(struct egl_manager *eman, EGLint surface_type, EGLint w, EGLint h)
 610 {
 611    int window_w = w, window_h = h;
 612
 613    if (surface_type == EGL_PBUFFER_BIT)
 614       printf("there will be no screen update if "
 615              "eglCopyBuffers() is not implemented\n");
 616
 617    while (1) {
 618       while (XPending(eman->xdpy) > 0) {
 619          XEvent event;
 620          XNextEvent(eman->xdpy, &event);
 621          switch (event.type) {
 622          case Expose:
 623             /* we'll redraw below */
 624             break;
 625          case ConfigureNotify:
 626             window_w = event.xconfigure.width;
 627             window_h = event.xconfigure.height;
 628             if (surface_type == EGL_WINDOW_BIT)
 629                reshape(window_w, window_h);
 630             break;
 631          case KeyPress:
 632             {
 633                char buffer[10];
 634                int r, code;
 635                code = XLookupKeysym(&event.xkey, 0);
 636                if (code == XK_Left) {
 637                   view_roty += 5.0;
 638                }
 639                else if (code == XK_Right) {
 640                   view_roty -= 5.0;
 641                }
 642                else if (code == XK_Up) {
 643                   view_rotx += 5.0;
 644                }
 645                else if (code == XK_Down) {
 646                   view_rotx -= 5.0;
 647                }
 648                else {
 649                   r = XLookupString(&event.xkey, buffer, sizeof(buffer),
 650                                     NULL, NULL);
 651                   if (buffer[0] == 27) {
 652                      /* escape */
 653                      return;
 654                   }
 655                }
 656             }
 657          }
 658       }
 659
 660       {
 661          static int frames = 0;
 662          static double tRot0 = -1.0, tRate0 = -1.0;
 663          double dt, t = current_time();
 664          if (tRot0 < 0.0)
 665             tRot0 = t;
 666          dt = t - tRot0;
 667          tRot0 = t;
 668
 669          /* advance rotation for next frame */
 670          angle += 70.0 * dt;  /* 70 degrees per second */
 671          if (angle > 3600.0)
 672              angle -= 3600.0;
 673
 674          switch (surface_type) {
 675          case GEARS_WINDOW:
 676             draw();
 677             eglSwapBuffers(eman->dpy, eman->win);
 678             break;
 679
 680          case GEARS_PBUFFER:
 681             draw();
 682             if (!eglCopyBuffers(eman->dpy, eman->pbuf, eman->xpix))
 683                break;
 684             copy_gears(eman, w, h, window_w, window_h);
 685             break;
 686
 687          case GEARS_PBUFFER_TEXTURE:
 688             eglMakeCurrent(eman->dpy, eman->pbuf, eman->pbuf, eman->ctx);
 689             draw();
 690             texture_gears(eman, surface_type);
 691             break;
 692
 693          case GEARS_PIXMAP:
 694             draw();
 695             copy_gears(eman, w, h, window_w, window_h);
 696             break;
 697
 698          case GEARS_PIXMAP_TEXTURE:
 699             eglMakeCurrent(eman->dpy, eman->pix, eman->pix, eman->ctx);
 700             draw();
 701             texture_gears(eman, surface_type);
 702             break;
 703
 704          case GEARS_RENDERBUFFER:
 705             glBindFramebuffer(GL_FRAMEBUFFER_EXT, eman->fbo);
 706             draw();
 707             glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
 708             texture_gears(eman, surface_type);
 709             break;
 710          }
 711
 712          frames++;
 713
 714          if (tRate0 < 0.0)
 715             tRate0 = t;
 716          if (t - tRate0 >= 5.0) {
 717             GLfloat seconds = t - tRate0;
 718             GLfloat fps = frames / seconds;
 719             printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
 720                    fps);
 721             tRate0 = t;
 722             frames = 0;
 723          }
 724       }
 725    }
 726 }
 727
 728
 729 static void
 730 usage(void)
 731 {
 732    printf("Usage:\n");
 733    printf("  -display <displayname>  set the display to run on\n");
 734    printf("  -fullscreen             run in fullscreen mode\n");
 735    printf("  -info                   display OpenGL renderer info\n");
 736    printf("  -pixmap                 use pixmap surface\n");
 737    printf("  -pixmap-texture         use pixmap surface and texture using EGLImage\n");
 738    printf("  -pbuffer                use pbuffer surface and eglCopyBuffers\n");
 739    printf("  -pbuffer-texture        use pbuffer surface and eglBindTexImage\n");
 740    printf("  -renderbuffer           renderbuffer as EGLImage and bind as texture from\n");
 741 }
 742
 743 static const char *names[] = {
 744    "window",
 745    "pixmap",
 746    "pixmap_texture",
 747    "pbuffer",
 748    "pbuffer_texture",
 749    "renderbuffer"
 750 };
 751
 752 int
 753 main(int argc, char *argv[])
 754 {
 755    const int winWidth = 300, winHeight = 300;
 756    Display *x_dpy;
 757    char *dpyName = NULL;
 758    struct egl_manager *eman;
 759    EGLint attribs[] = {
 760       EGL_SURFACE_TYPE, EGL_WINDOW_BIT, /* may be changed later */
 761       EGL_RED_SIZE, 1,
 762       EGL_GREEN_SIZE, 1,
 763       EGL_BLUE_SIZE, 1,
 764       EGL_DEPTH_SIZE, 1,
 765       EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
 766       EGL_NONE
 767    };
 768    char win_title[] = "xeglgears (window/pixmap/pbuffer)";
 769    EGLint surface_type = GEARS_WINDOW;
 770    GLboolean printInfo = GL_FALSE;
 771    GLboolean fullscreen = GL_FALSE;
 772    EGLBoolean ret;
 773    GLuint texture, color_rb, depth_rb;
 774    int i;
 775
 776    for (i = 1; i < argc; i++) {
 777       if (strcmp(argv[i], "-display") == 0) {
 778          dpyName = argv[i+1];
 779          i++;
 780       }
 781       else if (strcmp(argv[i], "-info") == 0) {
 782          printInfo = GL_TRUE;
 783       }
 784       else if (strcmp(argv[i], "-fullscreen") == 0) {
 785          fullscreen = GL_TRUE;
 786       }
 787       else if (strcmp(argv[i], "-pixmap") == 0) {
 788          surface_type = GEARS_PIXMAP;
 789          attribs[1] = EGL_PIXMAP_BIT;
 790       }
 791       else if (strcmp(argv[i], "-pixmap-texture") == 0) {
 792          surface_type = GEARS_PIXMAP_TEXTURE;
 793          attribs[1] = EGL_PIXMAP_BIT;
 794       }
 795       else if (strcmp(argv[i], "-pbuffer") == 0) {
 796          surface_type = GEARS_PBUFFER;
 797          attribs[1] = EGL_PBUFFER_BIT;
 798       }
 799       else if (strcmp(argv[i], "-pbuffer-texture") == 0) {
 800          surface_type = GEARS_PBUFFER_TEXTURE;
 801          attribs[1] = EGL_PBUFFER_BIT;
 802       }
 803       else if (strcmp(argv[i], "-renderbuffer") == 0) {
 804          surface_type = GEARS_RENDERBUFFER;
 805       }
 806       else {
 807          usage();
 808          return -1;
 809       }
 810    }
 811
 812    x_dpy = XOpenDisplay(dpyName);
 813    if (!x_dpy) {
 814       printf("Error: couldn't open display %s\n",
 815              dpyName ? dpyName : getenv("DISPLAY"));
 816       return -1;
 817    }
 818
 819    eglBindAPI(EGL_OPENGL_API);
 820
 821    eman = egl_manager_new(x_dpy, attribs, printInfo);
 822    if (!eman) {
 823       XCloseDisplay(x_dpy);
 824       return -1;
 825    }
 826
 827    snprintf(win_title, sizeof(win_title),
 828             "xeglgears (%s)", names[surface_type]);
 829
 830    ret = egl_manager_create_window(eman, win_title, winWidth, winHeight,
 831                                    EGL_TRUE, fullscreen, NULL);
 832    if (!ret)
 833       return -1;
 834
 835    /* create surface(s) */
 836    switch (surface_type) {
 837    case GEARS_WINDOW:
 838       if (ret)
 839          ret = eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
 840       break;
 841    case GEARS_PIXMAP:
 842    case GEARS_PIXMAP_TEXTURE:
 843       ret = egl_manager_create_pixmap(eman, eman->xwin, EGL_TRUE, NULL);
 844       if (surface_type == GEARS_PIXMAP_TEXTURE)
 845          eman->image = eglCreateImageKHR (eman->dpy, eman->ctx,
 846                                           EGL_NATIVE_PIXMAP_KHR,
 847                                           (EGLClientBuffer) eman->xpix, NULL);
 848       if (ret)
 849          ret = eglMakeCurrent(eman->dpy, eman->pix, eman->pix, eman->ctx);
 850       break;
 851    case GEARS_PBUFFER:
 852    case GEARS_PBUFFER_TEXTURE:
 853       {
 854          EGLint pbuf_attribs[] = {
 855             EGL_WIDTH, winWidth,
 856             EGL_HEIGHT, winHeight,
 857             EGL_TEXTURE_FORMAT, EGL_TEXTURE_RGB,
 858             EGL_TEXTURE_TARGET, EGL_TEXTURE_2D,
 859             EGL_NONE
 860          };
 861          ret = (egl_manager_create_pixmap(eman, eman->xwin,
 862                                           EGL_TRUE, NULL) &&
 863                 egl_manager_create_pbuffer(eman, pbuf_attribs));
 864          if (ret)
 865             ret = eglMakeCurrent(eman->dpy, eman->pbuf, eman->pbuf, eman->ctx);
 866       }
 867       break;
 868
 869
 870    case GEARS_RENDERBUFFER:
 871       ret = eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
 872       if (ret == EGL_FALSE)
 873          printf("failed to make context current\n");
 874
 875       glGenFramebuffers(1, &eman->fbo);
 876       glBindFramebuffer(GL_FRAMEBUFFER_EXT, eman->fbo);
 877
 878       glGenRenderbuffers(1, &color_rb);
 879       glBindRenderbuffer(GL_RENDERBUFFER_EXT, color_rb);
 880       glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_RGBA, winWidth, winHeight);
 881       glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 882                                    GL_COLOR_ATTACHMENT0_EXT,
 883                                    GL_RENDERBUFFER_EXT,
 884                                    color_rb);
 885
 886       eman->image = eglCreateImageKHR(eman->dpy, eman->ctx,
 887                                       EGL_GL_RENDERBUFFER_KHR,
 888                                       (EGLClientBuffer) color_rb, NULL);
 889
 890       glGenRenderbuffers(1, &depth_rb);
 891       glBindRenderbuffer(GL_RENDERBUFFER_EXT, depth_rb);
 892       glRenderbufferStorage(GL_RENDERBUFFER_EXT,
 893                             GL_DEPTH_COMPONENT, winWidth, winHeight);
 894       glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
 895                                    GL_DEPTH_ATTACHMENT_EXT,
 896                                    GL_RENDERBUFFER_EXT,
 897                                    depth_rb);
 898
 899       if (glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE) {
 900          printf("framebuffer not complete\n");
 901          exit(1);
 902       }
 903
 904       break;
 905
 906    default:
 907       ret = EGL_FALSE;
 908       break;
 909    }
 910
 911    switch (surface_type) {
 912    case GEARS_PIXMAP_TEXTURE:
 913    case GEARS_RENDERBUFFER:
 914            glGenTextures(1, &texture);
 915            glBindTexture(GL_TEXTURE_2D, texture);
 916            glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eman->image);
 917            break;
 918    case GEARS_PBUFFER_TEXTURE:
 919            glGenTextures(1, &texture);
 920            glBindTexture(GL_TEXTURE_2D, texture);
 921            break;
 922    }
 923
 924    if (!ret) {
 925       egl_manager_destroy(eman);
 926       XCloseDisplay(x_dpy);
 927       return -1;
 928    }
 929
 930    if (printInfo) {
 931       printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
 932       printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
 933       printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
 934    }
 935
 936    init();
 937
 938    /* Set initial projection/viewing transformation.
 939     * We can't be sure we'll get a ConfigureNotify event when the window
 940     * first appears.
 941     */
 942    reshape(winWidth, winHeight);
 943
 944    event_loop(eman, surface_type, winWidth, winHeight);
 945
 946    glDeleteLists(gear1, 1);
 947    glDeleteLists(gear2, 1);
 948    glDeleteLists(gear3, 1);
 949
 950    egl_manager_destroy(eman);
 951    XCloseDisplay(x_dpy);
 952
 953    return 0;
 954 }