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* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* Version of glxgears that creates/destroys the rendering context for each
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* frame. Also periodically destroy/recreate the window.
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* Good for finding memory leaks, etc.
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* Command line options:
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* -info print GL implementation information
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#include <X11/keysym.h>
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/* XXX this probably isn't very portable */
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/* return current time (in seconds) */
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(void) gettimeofday(&tv, NULL );
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(void) gettimeofday(&tv, &tz);
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return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
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/* update this function for other platforms! */
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static double t = 0.0;
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fprintf(stderr, "Warning: current_time() not implemented!!\n");
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#define M_PI 3.14159265
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static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
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static GLint gear1, gear2, gear3;
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static GLfloat angle = 0.0;
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static XVisualInfo *visinfo = NULL;
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static int WinWidth = 300, WinHeight = 300;
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* Draw a gear wheel. You'll probably want to call this function when
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* building a display list since we do a lot of trig here.
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* Input: inner_radius - radius of hole at center
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* outer_radius - radius at center of teeth
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* width - width of gear
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* teeth - number of teeth
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* tooth_depth - depth of tooth
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gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
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GLint teeth, GLfloat tooth_depth)
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r1 = outer_radius - tooth_depth / 2.0;
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r2 = outer_radius + tooth_depth / 2.0;
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da = 2.0 * M_PI / teeth / 4.0;
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glShadeModel(GL_FLAT);
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glNormal3f(0.0, 0.0, 1.0);
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/* draw front face */
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glBegin(GL_QUAD_STRIP);
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for (i = 0; i <= teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
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glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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/* draw front sides of teeth */
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da = 2.0 * M_PI / teeth / 4.0;
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for (i = 0; i < teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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glNormal3f(0.0, 0.0, -1.0);
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glBegin(GL_QUAD_STRIP);
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for (i = 0; i <= teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
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/* draw back sides of teeth */
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da = 2.0 * M_PI / teeth / 4.0;
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for (i = 0; i < teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
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glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
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/* draw outward faces of teeth */
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glBegin(GL_QUAD_STRIP);
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for (i = 0; i < teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
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glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
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u = r2 * cos(angle + da) - r1 * cos(angle);
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v = r2 * sin(angle + da) - r1 * sin(angle);
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len = sqrt(u * u + v * v);
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glNormal3f(v, -u, 0.0);
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
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glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
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glNormal3f(cos(angle), sin(angle), 0.0);
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
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glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
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u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
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v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
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glNormal3f(v, -u, 0.0);
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
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glNormal3f(cos(angle), sin(angle), 0.0);
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glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
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glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
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glShadeModel(GL_SMOOTH);
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/* draw inside radius cylinder */
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glBegin(GL_QUAD_STRIP);
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for (i = 0; i <= teeth; i++) {
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angle = i * 2.0 * M_PI / teeth;
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glNormal3f(-cos(angle), -sin(angle), 0.0);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
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glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glRotatef(view_rotx, 1.0, 0.0, 0.0);
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glRotatef(view_roty, 0.0, 1.0, 0.0);
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glRotatef(view_rotz, 0.0, 0.0, 1.0);
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glTranslatef(-3.0, -2.0, 0.0);
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glRotatef(angle, 0.0, 0.0, 1.0);
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glTranslatef(3.1, -2.0, 0.0);
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glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
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glTranslatef(-3.1, 4.2, 0.0);
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glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
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/* new window size or exposure */
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reshape(int width, int height)
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glViewport(0, 0, (GLint) width, (GLint) height);
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GLfloat h = (GLfloat) height / (GLfloat) width;
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glMatrixMode(GL_PROJECTION);
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glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
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glMatrixMode(GL_MODELVIEW);
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glTranslatef(0.0, 0.0, -40.0);
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static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
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static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
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static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
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static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
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glLightfv(GL_LIGHT0, GL_POSITION, pos);
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glEnable(GL_CULL_FACE);
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glEnable(GL_LIGHTING);
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glEnable(GL_DEPTH_TEST);
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gear1 = glGenLists(1);
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glNewList(gear1, GL_COMPILE);
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glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
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gear(1.0, 4.0, 1.0, 20, 0.7);
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gear2 = glGenLists(1);
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glNewList(gear2, GL_COMPILE);
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glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
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gear(0.5, 2.0, 2.0, 10, 0.7);
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gear3 = glGenLists(1);
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glNewList(gear3, GL_COMPILE);
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glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
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gear(1.3, 2.0, 0.5, 10, 0.7);
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glEnable(GL_NORMALIZE);
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draw( Display *dpy, Window win )
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ctx = glXCreateContext( dpy, visinfo, NULL, True );
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printf("Error: glXCreateContext failed\n");
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glXMakeCurrent(dpy, win, ctx);
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reshape(WinWidth, WinHeight);
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glDeleteLists(gear1, 1);
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glDeleteLists(gear2, 1);
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glDeleteLists(gear3, 1);
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glXSwapBuffers(dpy, win);
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glXDestroyContext(dpy, ctx);
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* Create an RGB, double-buffered window.
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* Return the window and context handles.
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make_window( Display *dpy, const char *name,
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int x, int y, int width, int height,
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int attribs[] = { GLX_RGBA,
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XSetWindowAttributes attr;
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scrnum = DefaultScreen( dpy );
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root = RootWindow( dpy, scrnum );
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visinfo = glXChooseVisual( dpy, scrnum, attribs );
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printf("Error: couldn't get an RGB, Double-buffered visual\n");
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/* window attributes */
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attr.background_pixel = 0;
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attr.border_pixel = 0;
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attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
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attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
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attr.override_redirect = 0;
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mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
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win = XCreateWindow( dpy, root, x, y, width, height,
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0, visinfo->depth, InputOutput,
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visinfo->visual, mask, &attr );
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/* set hints and properties */
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XSizeHints sizehints;
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sizehints.width = width;
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sizehints.height = height;
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sizehints.flags = USSize | USPosition;
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XSetNormalHints(dpy, win, &sizehints);
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XSetStandardProperties(dpy, win, name, name,
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None, (char **)NULL, 0, &sizehints);
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event_loop(Display *dpy)
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make_window(dpy, "glxgears", 0, 0, WinWidth, WinHeight, &win);
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XMapWindow(dpy, win);
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while (XPending(dpy) > 0) {
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XNextEvent(dpy, &event);
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switch (event.type) {
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/* we'll redraw below */
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case ConfigureNotify:
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WinWidth = event.xconfigure.width;
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WinHeight = event.xconfigure.height;
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code = XLookupKeysym(&event.xkey, 0);
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if (code == XK_Left) {
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else if (code == XK_Right) {
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else if (code == XK_Up) {
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else if (code == XK_Down) {
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r = XLookupString(&event.xkey, buffer, sizeof(buffer),
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if (buffer[0] == 27) {
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static int frames = 0;
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static double tRot0 = -1.0, tRate0 = -1.0;
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double dt, t = current_time();
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/* advance rotation for next frame */
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angle += 70.0 * dt; /* 70 degrees per second */
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if (t - tRate0 >= 1.0) {
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GLfloat seconds = t - tRate0;
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GLfloat fps = frames / seconds;
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printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
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/* Destroy window and create new one */
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XDestroyWindow(dpy, win);
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make_window(dpy, "glxgears",
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(int)(fps * 100) % 100, (int)(fps * 100) % 100, /* x,y */
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WinWidth, WinHeight, &win);
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XMapWindow(dpy, win);
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main(int argc, char *argv[])
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char *dpyName = NULL;
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GLboolean printInfo = GL_FALSE;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-display") == 0) {
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else if (strcmp(argv[i], "-info") == 0) {
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printf("Warrning: unknown parameter: %s\n", argv[i]);
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dpy = XOpenDisplay(dpyName);
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fprintf(stderr, "Error: couldn't open display %s\n",
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XDisplayName(dpyName));
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printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
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printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
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printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
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printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
added
removed
src/xdemos/glxcontexts.c
