eglgears.c

/*
 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * This is a port of the infamous "glxgears" demo to straight EGL
 * Port by Dane Rushton 10 July 2005
 * 
 * No command line options.
 * Program runs for 5 seconds then exits, outputing framerate to console
 */

#define EGL_EGLEXT_PROTOTYPES

#include <assert.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <GL/gl.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>

#define MAX_CONFIGS 10
#define MAX_MODES 100

#define BENCHMARK

#ifdef BENCHMARK

/* XXX this probably isn't very portable */

#include <sys/time.h>
#include <unistd.h>

/* return current time (in seconds) */
static double
current_time(void)
{
   struct timeval tv;
#ifdef __VMS
   (void) gettimeofday(&tv, NULL );
#else
   struct timezone tz;
   (void) gettimeofday(&tv, &tz);
#endif
   return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
}

#else /*BENCHMARK*/

/* dummy */
static double
current_time(void)
{
   /* update this function for other platforms! */
   static double t = 0.0;
   static int warn = 1;
   if (warn) {
      fprintf(stderr, "Warning: current_time() not implemented!!\n");
      warn = 0;
   }
   return t += 1.0;
}

#endif /*BENCHMARK*/


#ifndef M_PI
#define M_PI 3.14159265
#endif


static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;

#if 0
static GLfloat eyesep = 5.0;        /* Eye separation. */
static GLfloat fix_point = 40.0;    /* Fixation point distance.  */
static GLfloat left, right, asp;    /* Stereo frustum params.  */
#endif


/*
 *
 *  Draw a gear wheel.  You'll probably want to call this function when
 *  building a display list since we do a lot of trig here.
 * 
 *  Input:  inner_radius - radius of hole at center
 *          outer_radius - radius at center of teeth
 *          width - width of gear
 *          teeth - number of teeth
 *          tooth_depth - depth of tooth
 */
static void
gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
     GLint teeth, GLfloat tooth_depth)
{
   GLint i;
   GLfloat r0, r1, r2;
   GLfloat angle, da;
   GLfloat u, v, len;

   r0 = inner_radius;
   r1 = outer_radius - tooth_depth / 2.0;
   r2 = outer_radius + tooth_depth / 2.0;

   da = 2.0 * M_PI / teeth / 4.0;

   glShadeModel(GL_FLAT);

   glNormal3f(0.0, 0.0, 1.0);

   /* draw front face */
   glBegin(GL_QUAD_STRIP);
   for (i = 0; i <= teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;
      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
      if (i < teeth) {
       glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
                width * 0.5);
      }
   }
   glEnd();

   /* draw front sides of teeth */
   glBegin(GL_QUADS);
   da = 2.0 * M_PI / teeth / 4.0;
   for (i = 0; i < teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;

      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
             width * 0.5);
      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
             width * 0.5);
   }
   glEnd();

   glNormal3f(0.0, 0.0, -1.0);

   /* draw back face */
   glBegin(GL_QUAD_STRIP);
   for (i = 0; i <= teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;
      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
      if (i < teeth) {
       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
                -width * 0.5);
       glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
      }
   }
   glEnd();

   /* draw back sides of teeth */
   glBegin(GL_QUADS);
   da = 2.0 * M_PI / teeth / 4.0;
   for (i = 0; i < teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;

      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
             -width * 0.5);
      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
             -width * 0.5);
      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
   }
   glEnd();

   /* draw outward faces of teeth */
   glBegin(GL_QUAD_STRIP);
   for (i = 0; i < teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;

      glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
      glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
      u = r2 * cos(angle + da) - r1 * cos(angle);
      v = r2 * sin(angle + da) - r1 * sin(angle);
      len = sqrt(u * u + v * v);
      u /= len;
      v /= len;
      glNormal3f(v, -u, 0.0);
      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
      glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
      glNormal3f(cos(angle), sin(angle), 0.0);
      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
             width * 0.5);
      glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
             -width * 0.5);
      u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
      v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
      glNormal3f(v, -u, 0.0);
      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
             width * 0.5);
      glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
             -width * 0.5);
      glNormal3f(cos(angle), sin(angle), 0.0);
   }

   glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
   glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);

   glEnd();

   glShadeModel(GL_SMOOTH);

   /* draw inside radius cylinder */
   glBegin(GL_QUAD_STRIP);
   for (i = 0; i <= teeth; i++) {
      angle = i * 2.0 * M_PI / teeth;
      glNormal3f(-cos(angle), -sin(angle), 0.0);
      glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
      glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
   }
   glEnd();
}


static void
draw(void)
{
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

   glPushMatrix();
   glRotatef(view_rotx, 1.0, 0.0, 0.0);
   glRotatef(view_roty, 0.0, 1.0, 0.0);
   glRotatef(view_rotz, 0.0, 0.0, 1.0);

   glPushMatrix();
   glTranslatef(-3.0, -2.0, 0.0);
   glRotatef(angle, 0.0, 0.0, 1.0);
   glCallList(gear1);
   glPopMatrix();

   glPushMatrix();
   glTranslatef(3.1, -2.0, 0.0);
   glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
   glCallList(gear2);
   glPopMatrix();

   glPushMatrix();
   glTranslatef(-3.1, 4.2, 0.0);
   glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
   glCallList(gear3);
   glPopMatrix();

   glPopMatrix();
}


/* new window size or exposure */
static void
reshape(int width, int height)
{
   glViewport(0, 0, (GLint) width, (GLint) height);

   GLfloat h = (GLfloat) height / (GLfloat) width;

   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
   
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
   glTranslatef(0.0, 0.0, -40.0);
}
   


static void
init(void)
{
   static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
   static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
   static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
   static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };

   glLightfv(GL_LIGHT0, GL_POSITION, pos);
   glEnable(GL_CULL_FACE);
   glEnable(GL_LIGHTING);
   glEnable(GL_LIGHT0);
   glEnable(GL_DEPTH_TEST);

   /* make the gears */
   gear1 = glGenLists(1);
   glNewList(gear1, GL_COMPILE);
   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
   gear(1.0, 4.0, 1.0, 20, 0.7);
   glEndList();

   gear2 = glGenLists(1);
   glNewList(gear2, GL_COMPILE);
   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
   gear(0.5, 2.0, 2.0, 10, 0.7);
   glEndList();

   gear3 = glGenLists(1);
   glNewList(gear3, GL_COMPILE);
   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
   gear(1.3, 2.0, 0.5, 10, 0.7);
   glEndList();

   glEnable(GL_NORMALIZE);
}




static void run_gears(EGLDisplay dpy, EGLSurface surf, int ttr)
{
      double st = current_time();
      double ct = st;
      int frames = 0;
      while (ct - st < ttr)
      {
            double tt = current_time();
            double dt = tt - ct;
            ct = tt;
            
            /* advance rotation for next frame */
            angle += 70.0 * dt;  /* 70 degrees per second */
            if (angle > 3600.0)
                  angle -= 3600.0;
            
            draw();
            
            eglSwapBuffers(dpy, surf);
      
            
            frames++;
      }
      
      GLfloat seconds = ct - st;
      GLfloat fps = frames / seconds;
      printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds, fps);
      
}


int
main(int argc, char *argv[])
{
      int maj, min;
      EGLContext ctx;
      EGLSurface screen_surf;
      EGLConfig configs[MAX_CONFIGS];
      EGLint numConfigs, i;
      EGLBoolean b;
      EGLDisplay d;
      EGLint screenAttribs[10];
      EGLModeMESA mode[MAX_MODES];
      EGLScreenMESA screen;
      EGLint count, chosenMode;
      GLboolean printInfo = GL_FALSE;
      EGLint width = 0, height = 0;
      
        /* parse cmd line args */
      for (i = 1; i < argc; i++)
      {
            if (strcmp(argv[i], "-info") == 0)
            {
                  printInfo = GL_TRUE;
            }
            else
                  printf("Warning: unknown parameter: %s\n", argv[i]);
      }
      
      /* DBR : Create EGL context/surface etc */
      d = eglGetDisplay((EGLNativeDisplayType)"!egl_kms_vmwgfx");
      assert(d);

      if (!eglInitialize(d, &maj, &min)) {
            printf("eglgears: eglInitialize failed: %d\n", eglGetError());
            exit(1);
      }
      
      printf("eglgears: EGL version = %d.%d\n", maj, min);
      printf("eglgears: EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
      
        /* XXX use ChooseConfig */
      eglGetConfigs(d, configs, MAX_CONFIGS, &numConfigs);
      eglGetScreensMESA(d, &screen, 1, &count);

      if (!eglGetModesMESA(d, screen, mode, MAX_MODES, &count) || count == 0) {
            printf("eglgears: eglGetModesMESA failed! %d --\n", eglGetError());
            return 0;
      }

        /* Print list of modes, and find the one to use */
      printf("eglgears: Found %d modes:\n", count);
      for (i = 0; i < count; i++) {
            EGLint w, h;
            eglGetModeAttribMESA(d, mode[i], EGL_WIDTH, &w);
            eglGetModeAttribMESA(d, mode[i], EGL_HEIGHT, &h);
            printf("%3d: %d x %d\n", i, w, h);
            if (w > width && h > height) {
                  width = w;
                  height = h;
                        chosenMode = i;
            }
      }
      printf("eglgears: Using screen mode/size %d: %d x %d\n", chosenMode, width, height);

      ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL);
      if (ctx == EGL_NO_CONTEXT) {
            printf("eglgears: failed to create context\n");
            return 0;
      }
      
      /* build up screenAttribs array */
      i = 0;
      screenAttribs[i++] = EGL_WIDTH;
      screenAttribs[i++] = width;
      screenAttribs[i++] = EGL_HEIGHT;
      screenAttribs[i++] = height;
      screenAttribs[i++] = EGL_NONE;

      screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
      if (screen_surf == EGL_NO_SURFACE) {
            printf("eglgears: failed to create screen surface\n");
            return 0;
      }
      
      b = eglShowScreenSurfaceMESA(d, screen, screen_surf, mode[chosenMode]);
      if (!b) {
            printf("eglgears: show surface failed\n");
            return 0;
      }

      b = eglMakeCurrent(d, screen_surf, screen_surf, ctx);
      if (!b) {
            printf("eglgears: make current failed\n");
            return 0;
      }
      
      if (printInfo)
      {
            printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
            printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
            printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
            printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
      }
      
      init();
      reshape(width, height);

        glDrawBuffer( GL_BACK );

      run_gears(d, screen_surf, 5.0);
      
      eglDestroySurface(d, screen_surf);
      eglDestroyContext(d, ctx);
      eglTerminate(d);
      
      return 0;
}

gistfile2.txt

libEGL warning: invalid fd 134524132
eglgears: eglInitialize failed: 12289