pixel format with necessary capabilities not found
本人正在学习OpenGL，运行书中6.2节的程序6-5，即aaindex.c时出现了下面的错误：
pixel format with necessary capabilities not found

源程序如下：

#include<GL/glew.h>
#include <GL/glut.h>
#include <stdlib.h>

#define RAMPSIZE 16
#define RAMP1START 32
#define RAMP2START 48

static float rotAngle = 0.;

/* Initialize antialiasing for color index mode,
* including loading a green color ramp starting
* at RAMP1START, and a blue color ramp starting
* at RAMP2START. The ramps must be a multiple of 16.
*/
void init(void)
{
int i;
GLenum err=glewInit();
if(GLEW_OK!=err)
{
printf("Error!");
}

for (i = 0; i < RAMPSIZE; i++) {
GLfloat shade;
shade = (GLfloat) i/(GLfloat) RAMPSIZE;
glutSetColor(RAMP1START+(GLint)i, 0., shade, 0.);
glutSetColor(RAMP2START+(GLint)i, 0., 0., shade);
}

glEnable (GL_LINE_SMOOTH);
glHint (GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
glLineWidth (1.5);

glClearIndex ((GLfloat) RAMP1START);
}

/* Draw 2 diagonal lines to form an X
*/
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);

glIndexi(RAMP1START);
glPushMatrix();
glRotatef(-rotAngle, 0.0, 0.0, 0.1);
glBegin (GL_LINES);
glVertex2f (-0.5, 0.5);
glVertex2f (0.5, -0.5);
glEnd ();
glPopMatrix();

glIndexi(RAMP2START);
glPushMatrix();
glRotatef(rotAngle, 0.0, 0.0, 0.1);
glBegin (GL_LINES);
glVertex2f (0.5, 0.5);
glVertex2f (-0.5, -0.5);
glEnd ();
glPopMatrix();

glFlush();
}

void reshape(int w, int h)
{
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (w <= h)
gluOrtho2D (-1.0, 1.0,
-1.0*(GLfloat)h/(GLfloat)w, 1.0*(GLfloat)h/(GLfloat)w);
else
gluOrtho2D (-1.0*(GLfloat)w/(GLfloat)h,
1.0*(GLfloat)w/(GLfloat)h, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}

void keyboard(unsigned char key, int x, int y)
{
switch (key) {
case 'r':
case 'R':
rotAngle += 20.;
if (rotAngle >= 360.) rotAngle = 0.;
glutPostRedisplay();
break;
case 27: /* Escape Key */
exit(0);
break;
default:
break;
}
}

/* Main Loop
* Open window with initial window size, title bar,
* color index display mode, and handle input events.
*/
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_INDEX);
glutInitWindowSize (200, 200);
glutCreateWindow (argv[0]);
init();
glutReshapeFunc (reshape);
glutKeyboardFunc (keyboard);
glutDisplayFunc (display);
glutMainLoop();
return 0;
}
望高手指点迷津。本人将万分感激！

[解决办法]
可能是你的显卡不支持GLUT_INDEX.