new test which uses mixed texgen/non-texgen texture coordinates to exhibit potential bugs in hardware drivers
This commit is contained in:
Roland Scheidegger
640
progs/tests/texgenmix.c
Normal file
640
progs/tests/texgenmix.c
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@@ -0,0 +1,640 @@
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/*
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* Demonstrates mixed texgen/non-texgen texture coordinates.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <GL/glut.h>
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#undef max
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#undef min
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#define max( a, b ) ((a) >= (b) ? (a) : (b))
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#define min( a, b ) ((a) <= (b) ? (a) : (b))
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GLfloat labelColor0[4] = { 1.0, 1.0, 1.0, 1.0 };
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GLfloat labelColor1[4] = { 1.0, 1.0, 0.4, 1.0 };
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GLfloat *labelInfoColor = labelColor0;
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GLboolean doubleBuffered = GL_TRUE;
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GLboolean drawTextured = GL_TRUE;
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int textureWidth = 64;
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int textureHeight = 64;
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int winWidth = 580, winHeight = 720;
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const GLfloat texmat_swap_rq[16] = { 1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 0.0, 1.0,
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0.0, 0.0, 1.0, 0.0};
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const GLfloat nullPlane[4] = { 0.0, 0.0, 0.0, 0.0 };
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const GLfloat ObjPlaneS1[4] = { 1.0, 0.0, 1.0, 0.0 };
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const GLfloat ObjPlaneS2[4] = { 0.5, 0.0, 0.0, 0.0 };
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const GLfloat ObjPlaneS3[4] = { 1.0, 0.0, 0.0, 0.0 };
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const GLfloat ObjPlaneT[4] = { 0.0, 1.0, 0.0, 0.0 };
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const GLfloat ObjPlaneT2[4] = { 0.0, 0.5, 0.0, 0.0 };
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const GLfloat ObjPlaneT3[4] = { 0.0, 1.0, 0.0, 0.0 };
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const GLfloat ObjPlaneR[4] = { 0.0, 0.0, 1.0, 0.0 };
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const GLfloat ObjPlaneQ[4] = { 0.0, 0.0, 0.0, 0.5 };
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static void checkErrors( void )
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{
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GLenum error;
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while ( (error = glGetError()) != GL_NO_ERROR ) {
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fprintf( stderr, "Error: %s\n", (char *) gluErrorString( error ) );
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}
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}
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static void drawString( const char *string, GLfloat x, GLfloat y,
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const GLfloat color[4] )
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{
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glColor4fv( color );
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glRasterPos2f( x, y );
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while ( *string ) {
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glutBitmapCharacter( GLUT_BITMAP_TIMES_ROMAN_10, *string );
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string++;
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}
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}
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static void begin2D( int width, int height )
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{
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glMatrixMode( GL_PROJECTION );
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glPushMatrix();
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glLoadIdentity();
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glOrtho( 0, width, 0, height, -1, 1 );
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glMatrixMode( GL_MODELVIEW );
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glPushMatrix();
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glLoadIdentity();
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}
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static void end2D( void )
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{
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glMatrixMode( GL_PROJECTION );
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glPopMatrix();
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glMatrixMode( GL_MODELVIEW );
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glPopMatrix();
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}
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static void initialize( void )
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{
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glMatrixMode( GL_PROJECTION );
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glLoadIdentity();
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glOrtho( -1.5, 1.5, -1.5, 1.5, -1.5, 1.5 );
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glShadeModel( GL_FLAT );
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}
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/* ARGSUSED1 */
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static void keyboard( unsigned char c, int x, int y )
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{
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switch ( c ) {
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case 't':
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drawTextured = !drawTextured;
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break;
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case 27: /* Escape key should force exit. */
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exit(0);
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break;
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default:
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break;
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}
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glutPostRedisplay();
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}
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/* ARGSUSED1 */
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static void special( int key, int x, int y )
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{
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switch ( key ) {
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case GLUT_KEY_DOWN:
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break;
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case GLUT_KEY_UP:
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break;
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case GLUT_KEY_LEFT:
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break;
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case GLUT_KEY_RIGHT:
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break;
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default:
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break;
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}
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glutPostRedisplay();
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}
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static void
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reshape( int w, int h )
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{
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winWidth = w;
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winHeight = h;
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/* No need to call glViewPort here since "draw" calls it! */
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}
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static void loadTexture( int width, int height )
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{
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int alphaSize = 1;
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int rgbSize = 3;
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GLubyte *texImage, *p;
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int elementsPerGroup, elementSize, groupSize, rowSize;
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int i, j;
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elementsPerGroup = alphaSize + rgbSize;
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elementSize = sizeof(GLubyte);
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groupSize = elementsPerGroup * elementSize;
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rowSize = width * groupSize;
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if ( (texImage = (GLubyte *) malloc( height * rowSize ) ) == NULL ) {
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fprintf( stderr, "texture malloc failed\n" );
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return;
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}
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for ( i = 0 ; i < height ; i++ )
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{
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p = texImage + i * rowSize;
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for ( j = 0 ; j < width ; j++ )
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{
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if ( rgbSize > 0 )
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{
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/**
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** +-----+-----+
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** | | |
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** | R | G |
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** | | |
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** +-----+-----+
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** | | |
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** | Y | B |
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** | | |
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** +-----+-----+
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**/
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if ( i > height / 2 ) {
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if ( j < width / 2 ) {
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p[0] = 0xff;
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p[1] = 0x00;
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p[2] = 0x00;
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} else {
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p[0] = 0x00;
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p[1] = 0xff;
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p[2] = 0x00;
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}
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} else {
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if ( j < width / 2 ) {
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p[0] = 0xff;
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p[1] = 0xff;
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p[2] = 0x00;
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} else {
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p[0] = 0x00;
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p[1] = 0x00;
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p[2] = 0xff;
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}
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}
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p += 3 * elementSize;
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}
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if ( alphaSize > 0 )
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{
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/**
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** +-----------+
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** | W |
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** | +-----+ |
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** | | | |
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** | | B | |
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** | | | |
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** | +-----+ |
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** | |
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** +-----------+
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**/
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int i2 = i - height / 2;
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int j2 = j - width / 2;
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int h8 = height / 8;
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int w8 = width / 8;
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if ( -h8 <= i2 && i2 <= h8 && -w8 <= j2 && j2 <= w8 ) {
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p[0] = 0x00;
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} else if ( -2 * h8 <= i2 && i2 <= 2 * h8 && -2 * w8 <= j2 && j2 <= 2 * w8 ) {
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p[0] = 0x55;
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} else if ( -3 * h8 <= i2 && i2 <= 3 * h8 && -3 * w8 <= j2 && j2 <= 3 * w8 ) {
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p[0] = 0xaa;
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} else {
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p[0] = 0xff;
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}
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p += elementSize;
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}
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}
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}
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glTexImage2D( GL_TEXTURE_2D, 0,
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GL_RGBA, width, height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, texImage );
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free( texImage );
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}
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static void drawSample( int x, int y, int w, int h,
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int texgenenabled, int coordnr )
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{
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char buf[255];
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glViewport( x, y, w, h );
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glScissor( x, y, w, h );
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glClearColor( 0.1, 0.1, 0.1, 1.0 );
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glClear( GL_COLOR_BUFFER_BIT );
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begin2D( w, h );
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if (texgenenabled == 2) {
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sprintf( buf, "TexCoord%df", coordnr);
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drawString( buf, 10, h - 15, labelInfoColor );
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sprintf( buf, "texgen enabled for %s coordinate(s)", coordnr == 2 ? "S" : "S/T");
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drawString( buf, 10, 5, labelInfoColor );
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}
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else if (texgenenabled == 0) {
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sprintf( buf, "TexCoord%df", coordnr);
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drawString( buf, 10, h - 15, labelInfoColor );
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drawString( "no texgen", 10, 5, labelInfoColor );
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}
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else if (texgenenabled == 1) {
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drawString( "no TexCoord", 10, h - 15, labelInfoColor );
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sprintf( buf, "texgen enabled for %s coordinate(s)",
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coordnr == 2 ? "S/T" : (coordnr == 3 ? "S/T/R" : "S/T/R/Q"));
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drawString( buf, 10, 5, labelInfoColor );
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}
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end2D();
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
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glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
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loadTexture( textureWidth, textureHeight );
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if ( drawTextured ) {
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glEnable( GL_TEXTURE_2D );
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}
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glDisable( GL_TEXTURE_GEN_S );
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glDisable( GL_TEXTURE_GEN_T );
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glDisable( GL_TEXTURE_GEN_R );
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glDisable( GL_TEXTURE_GEN_Q );
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glMatrixMode( GL_TEXTURE );
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glLoadIdentity();
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glMatrixMode( GL_MODELVIEW );
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glPushMatrix();
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switch (coordnr) {
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case 2:
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switch (texgenenabled) {
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case 0:
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glBegin( GL_QUADS );
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glTexCoord2f( 0.0, 0.0 );
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glVertex2f( -0.8, -0.8 );
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glTexCoord2f( 1.0, 0.0 );
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glVertex2f( 0.8, -0.8 );
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glTexCoord2f( 1.0, 1.0 );
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glVertex2f( 0.8, 0.8 );
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glTexCoord2f( 0.0, 1.0 );
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glVertex2f( -0.8, 0.8 );
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glEnd();
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break;
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case 1:
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/* why doesn't this case work with software mesa? The S/T tex coords
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should turn out as 0 and 1 if dot product of vertex coordinates with
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ObjPlaneS3/T3 is calculated, and Q coord should be default value (1.0), no?
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Submitting one dummy tex coordinate fixes this? */
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glTranslatef( -0.8, -0.8, 0.0 );
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glScalef( 1.6, 1.6, 1.0 );
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS3);
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glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT3);
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glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
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glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
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glEnable( GL_TEXTURE_GEN_S );
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glEnable( GL_TEXTURE_GEN_T );
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glBegin( GL_QUADS );
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/* glTexCoord1f( 0.0 );*/
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glVertex2f( 0.0, 0.0 );
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glVertex2f( 1.0, 0.0 );
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glVertex2f( 1.0, 1.0 );
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glVertex2f( 0.0, 1.0 );
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glEnd();
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break;
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case 2:
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/* make sure that texgen T and non-texgen S coordinate are wrong */
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS1);
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glTexGenfv(GL_T, GL_OBJECT_PLANE, nullPlane);
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glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
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glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
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glEnable( GL_TEXTURE_GEN_S );
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glBegin( GL_QUADS );
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/* use z coordinate to get correct texgen values... */
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glTexCoord2f( 0.0, 0.0 );
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glVertex3f( -0.8, -0.8, 0.8 );
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glTexCoord2f( 0.0, 0.0 );
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glVertex3f( 0.8, -0.8, 0.2 );
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glTexCoord2f( 0.0, 1.0 );
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glVertex3f( 0.8, 0.8, 0.2 );
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glTexCoord2f( 0.0, 1.0 );
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glVertex3f( -0.8, 0.8, 0.8 );
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glEnd();
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break;
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}
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break;
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case 3:
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glMatrixMode( GL_TEXTURE );
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glLoadMatrixf( texmat_swap_rq );
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glMatrixMode( GL_MODELVIEW );
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glTranslatef( -0.8, -0.8, 0.0 );
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glScalef( 1.6, 1.6, 1.0 );
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switch (texgenenabled) {
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case 0:
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glBegin( GL_QUADS );
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glTexCoord3f( 0.0, 0.0, 0.5 );
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glVertex2f( 0.0, 0.0 );
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glTexCoord3f( 0.5, 0.0, 0.5 );
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glVertex2f( 1.0, 0.0 );
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glTexCoord3f( 0.5, 0.5, 0.5 );
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glVertex2f( 1.0, 1.0 );
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glTexCoord3f( 0.0, 0.5, 0.5 );
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glVertex2f( 0.0, 1.0 );
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glEnd();
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break;
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case 1:
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS2);
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glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT2);
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glTexGenfv(GL_R, GL_OBJECT_PLANE, ObjPlaneR);
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glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
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glEnable( GL_TEXTURE_GEN_S );
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glEnable( GL_TEXTURE_GEN_T );
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glEnable( GL_TEXTURE_GEN_R );
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glBegin( GL_QUADS );
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glVertex3f( 0.0, 0.0, 0.5 );
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glVertex3f( 1.0, 0.0, 0.5 );
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glVertex3f( 1.0, 1.0, 0.5 );
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glVertex3f( 0.0, 1.0, 0.5 );
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glEnd();
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break;
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case 2:
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/* make sure that texgen R/Q and non-texgen S/T coordinates are wrong */
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
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glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS2);
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glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT2);
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glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
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glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
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glEnable( GL_TEXTURE_GEN_S );
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glEnable( GL_TEXTURE_GEN_T );
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glBegin( GL_QUADS );
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glTexCoord3f( 0.0, 0.0, 0.5 );
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glVertex2f( 0.0, 0.0);
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glTexCoord3f( 0.0, 0.0, 0.5 );
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glVertex2f( 1.0, 0.0);
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glTexCoord3f( 0.0, 0.0, 0.5 );
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glVertex2f( 1.0, 1.0);
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glTexCoord3f( 0.0, 0.0, 0.5 );
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glVertex2f( 0.0, 1.0);
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glEnd();
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break;
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}
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break;
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case 4:
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switch (texgenenabled) {
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case 0:
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glBegin( GL_QUADS );
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/* don't need r coordinate but still setting it I'm mean */
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glTexCoord4f( 0.0, 0.0, 0.0, 0.5 );
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glVertex2f( -0.8, -0.8 );
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|
||||
glTexCoord4f( 0.5, 0.0, 0.2, 0.5 );
|
||||
glVertex2f( 0.8, -0.8 );
|
||||
|
||||
glTexCoord4f( 0.5, 0.5, 0.5, 0.5 );
|
||||
glVertex2f( 0.8, 0.8 );
|
||||
|
||||
glTexCoord4f( 0.0, 0.5, 0.5, 0.5 );
|
||||
glVertex2f( -0.8, 0.8 );
|
||||
glEnd();
|
||||
break;
|
||||
case 1:
|
||||
glTranslatef( -0.8, -0.8, 0.0 );
|
||||
glScalef( 1.6, 1.6, 1.0 );
|
||||
/* make sure that texgen R/Q and non-texgen S/T coordinates are wrong */
|
||||
glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS2);
|
||||
glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT2);
|
||||
glTexGenfv(GL_R, GL_OBJECT_PLANE, ObjPlaneR);
|
||||
glTexGenfv(GL_Q, GL_OBJECT_PLANE, ObjPlaneQ);
|
||||
|
||||
glEnable( GL_TEXTURE_GEN_S );
|
||||
glEnable( GL_TEXTURE_GEN_T );
|
||||
glEnable( GL_TEXTURE_GEN_R );
|
||||
glEnable( GL_TEXTURE_GEN_Q );
|
||||
|
||||
glBegin( GL_QUADS );
|
||||
glVertex2f( 0.0, 0.0 );
|
||||
glVertex2f( 1.0, 0.0 );
|
||||
glVertex2f( 1.0, 1.0 );
|
||||
glVertex2f( 0.0, 1.0 );
|
||||
glEnd();
|
||||
break;
|
||||
case 2:
|
||||
glTranslatef( -0.8, -0.8, 0.0 );
|
||||
glScalef( 1.6, 1.6, 1.0 );
|
||||
/* make sure that texgen R/Q and non-texgen S/T coordinates are wrong */
|
||||
glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
|
||||
glTexGenfv(GL_S, GL_OBJECT_PLANE, ObjPlaneS2);
|
||||
glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT2);
|
||||
glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
|
||||
glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
|
||||
|
||||
glEnable( GL_TEXTURE_GEN_S );
|
||||
glEnable( GL_TEXTURE_GEN_T );
|
||||
|
||||
glBegin( GL_QUADS );
|
||||
glTexCoord4f( 0.0, 0.0, 0.0, 0.5 );
|
||||
glVertex2f( 0.0, 0.0 );
|
||||
|
||||
glTexCoord4f( 0.0, 0.0, 0.2, 0.5 );
|
||||
glVertex2f( 1.0, 0.0 );
|
||||
|
||||
glTexCoord4f( 0.0, 0.0, 0.5, 0.5 );
|
||||
glVertex2f( 1.0, 1.0 );
|
||||
|
||||
glTexCoord4f( 0.0, 0.0, 0.75, 0.5 );
|
||||
glVertex2f( 0.0, 1.0 );
|
||||
glEnd();
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
glPopMatrix();
|
||||
glDisable( GL_TEXTURE_2D );
|
||||
|
||||
}
|
||||
|
||||
static void display( void )
|
||||
{
|
||||
int numX = 3, numY = 3;
|
||||
float xBase = (float) winWidth * 0.01;
|
||||
float xOffset = (winWidth - xBase) / numX;
|
||||
float xSize = max( xOffset - xBase, 1 );
|
||||
float yBase = (float) winHeight * 0.01;
|
||||
float yOffset = (winHeight - yBase) / numY;
|
||||
float ySize = max( yOffset - yBase, 1 );
|
||||
float x, y;
|
||||
int i, j;
|
||||
|
||||
glViewport( 0, 0, winWidth, winHeight );
|
||||
glDisable( GL_SCISSOR_TEST );
|
||||
glClearColor( 0.0, 0.0, 0.0, 0.0 );
|
||||
glClear( GL_COLOR_BUFFER_BIT );
|
||||
glEnable( GL_SCISSOR_TEST );
|
||||
|
||||
x = xBase;
|
||||
y = (winHeight - 1) - yOffset;
|
||||
|
||||
for ( i = 0 ; i < numY ; i++ )
|
||||
{
|
||||
|
||||
labelInfoColor = labelColor1;
|
||||
|
||||
|
||||
for ( j = 0 ; j < numX ; j++ ) {
|
||||
drawSample( x, y, xSize, ySize, i, j+2 );
|
||||
x += xOffset;
|
||||
}
|
||||
|
||||
x = xBase;
|
||||
y -= yOffset;
|
||||
}
|
||||
|
||||
if ( doubleBuffered ) {
|
||||
glutSwapBuffers();
|
||||
} else {
|
||||
glFlush();
|
||||
}
|
||||
|
||||
checkErrors();
|
||||
}
|
||||
|
||||
static void usage( char *name )
|
||||
{
|
||||
fprintf( stderr, "usage: %s [ options ]\n", name );
|
||||
fprintf( stderr, "\n" );
|
||||
fprintf( stderr, "options:\n" );
|
||||
fprintf( stderr, " -sb single buffered\n" );
|
||||
fprintf( stderr, " -db double buffered\n" );
|
||||
fprintf( stderr, " -info print OpenGL driver info\n" );
|
||||
}
|
||||
|
||||
static void instructions( void )
|
||||
{
|
||||
fprintf( stderr, "texgenmix - mixed texgen/non-texgen texture coordinate test\n" );
|
||||
fprintf( stderr, "all quads should look the same!\n" );
|
||||
fprintf( stderr, "\n" );
|
||||
fprintf( stderr, " [t] - toggle texturing\n" );
|
||||
}
|
||||
|
||||
int main( int argc, char *argv[] )
|
||||
{
|
||||
GLboolean info = GL_FALSE;
|
||||
int i;
|
||||
|
||||
glutInit( &argc, argv );
|
||||
|
||||
for ( i = 1 ; i < argc ; i++ ) {
|
||||
if ( !strcmp( "-sb", argv[i] ) ) {
|
||||
doubleBuffered = GL_FALSE;
|
||||
} else if ( !strcmp( "-db", argv[i] ) ) {
|
||||
doubleBuffered = GL_TRUE;
|
||||
} else if ( !strcmp( "-info", argv[i] ) ) {
|
||||
info = GL_TRUE;
|
||||
} else {
|
||||
usage( argv[0] );
|
||||
exit( 1 );
|
||||
}
|
||||
}
|
||||
|
||||
if ( doubleBuffered ) {
|
||||
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
|
||||
} else {
|
||||
glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE );
|
||||
}
|
||||
|
||||
glutInitWindowSize( winWidth, winHeight );
|
||||
glutInitWindowPosition( 0, 0 );
|
||||
glutCreateWindow( "Mixed texgen/non-texgen texture coordinate test" );
|
||||
|
||||
initialize();
|
||||
instructions();
|
||||
|
||||
if ( info ) {
|
||||
printf( "\n" );
|
||||
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 ) );
|
||||
}
|
||||
|
||||
glutDisplayFunc( display );
|
||||
glutReshapeFunc( reshape );
|
||||
glutKeyboardFunc( keyboard );
|
||||
glutSpecialFunc( special );
|
||||
glutMainLoop();
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user