+++ /dev/null
-
-/*
- * Demonstrates mixed texgen/non-texgen texture coordinates.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-#undef max
-#undef min
-#define max( a, b ) ((a) >= (b) ? (a) : (b))
-#define min( a, b ) ((a) <= (b) ? (a) : (b))
-
-GLfloat labelColor0[4] = { 1.0, 1.0, 1.0, 1.0 };
-GLfloat labelColor1[4] = { 1.0, 1.0, 0.4, 1.0 };
-GLfloat *labelInfoColor = labelColor0;
-
-GLboolean doubleBuffered = GL_TRUE;
-GLboolean drawTextured = GL_TRUE;
-
-int textureWidth = 64;
-int textureHeight = 64;
-
-int winWidth = 580, winHeight = 720;
-
-const GLfloat texmat_swap_rq[16] = { 1.0, 0.0, 0.0, 0.0,
- 0.0, 1.0, 0.0, 0.0,
- 0.0, 0.0, 0.0, 1.0,
- 0.0, 0.0, 1.0, 0.0};
-
-const GLfloat nullPlane[4] = { 0.0, 0.0, 0.0, 0.0 };
-const GLfloat ObjPlaneS1[4] = { 1.0, 0.0, 1.0, 0.0 };
-const GLfloat ObjPlaneS2[4] = { 0.5, 0.0, 0.0, 0.0 };
-const GLfloat ObjPlaneS3[4] = { 1.0, 0.0, 0.0, 0.0 };
-const GLfloat ObjPlaneT[4] = { 0.0, 1.0, 0.0, 0.0 };
-const GLfloat ObjPlaneT2[4] = { 0.0, 0.5, 0.0, 0.0 };
-const GLfloat ObjPlaneT3[4] = { 0.0, 1.0, 0.0, 0.0 };
-const GLfloat ObjPlaneR[4] = { 0.0, 0.0, 1.0, 0.0 };
-const GLfloat ObjPlaneQ[4] = { 0.0, 0.0, 0.0, 0.5 };
-
-
-static void checkErrors( void )
-{
- GLenum error;
-
- while ( (error = glGetError()) != GL_NO_ERROR ) {
- fprintf( stderr, "Error: %s\n", (char *) gluErrorString( error ) );
- }
-}
-
-static void drawString( const char *string, GLfloat x, GLfloat y,
- const GLfloat color[4] )
-{
- glColor4fv( color );
- glRasterPos2f( x, y );
-
- while ( *string ) {
- glutBitmapCharacter( GLUT_BITMAP_TIMES_ROMAN_10, *string );
- string++;
- }
-}
-
-static void begin2D( int width, int height )
-{
- glMatrixMode( GL_PROJECTION );
-
- glPushMatrix();
- glLoadIdentity();
-
- glOrtho( 0, width, 0, height, -1, 1 );
- glMatrixMode( GL_MODELVIEW );
-
- glPushMatrix();
- glLoadIdentity();
-}
-
-static void end2D( void )
-{
- glMatrixMode( GL_PROJECTION );
- glPopMatrix();
- glMatrixMode( GL_MODELVIEW );
- glPopMatrix();
-}
-
-static void initialize( void )
-{
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
-
- glOrtho( -1.5, 1.5, -1.5, 1.5, -1.5, 1.5 );
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
- glShadeModel( GL_FLAT );
-}
-
-/* ARGSUSED1 */
-static void keyboard( unsigned char c, int x, int y )
-{
- switch ( c ) {
- case 't':
- drawTextured = !drawTextured;
- break;
- case 27: /* Escape key should force exit. */
- exit(0);
- break;
- default:
- break;
- }
- glutPostRedisplay();
-}
-
-/* ARGSUSED1 */
-static void special( int key, int x, int y )
-{
- switch ( key ) {
- case GLUT_KEY_DOWN:
- break;
- case GLUT_KEY_UP:
- break;
- case GLUT_KEY_LEFT:
- break;
- case GLUT_KEY_RIGHT:
- break;
- default:
- break;
- }
- glutPostRedisplay();
-}
-
-static void
-reshape( int w, int h )
-{
- winWidth = w;
- winHeight = h;
- /* No need to call glViewPort here since "draw" calls it! */
-}
-
-static void loadTexture( int width, int height )
-{
- int alphaSize = 1;
- int rgbSize = 3;
- GLubyte *texImage, *p;
- int elementsPerGroup, elementSize, groupSize, rowSize;
- int i, j;
-
-
- elementsPerGroup = alphaSize + rgbSize;
- elementSize = sizeof(GLubyte);
- groupSize = elementsPerGroup * elementSize;
- rowSize = width * groupSize;
-
- if ( (texImage = (GLubyte *) malloc( height * rowSize ) ) == NULL ) {
- fprintf( stderr, "texture malloc failed\n" );
- return;
- }
-
- for ( i = 0 ; i < height ; i++ )
- {
- p = texImage + i * rowSize;
-
- for ( j = 0 ; j < width ; j++ )
- {
- if ( rgbSize > 0 )
- {
- /**
- ** +-----+-----+
- ** | | |
- ** | R | G |
- ** | | |
- ** +-----+-----+
- ** | | |
- ** | Y | B |
- ** | | |
- ** +-----+-----+
- **/
- if ( i > height / 2 ) {
- if ( j < width / 2 ) {
- p[0] = 0xff;
- p[1] = 0x00;
- p[2] = 0x00;
- } else {
- p[0] = 0x00;
- p[1] = 0xff;
- p[2] = 0x00;
- }
- } else {
- if ( j < width / 2 ) {
- p[0] = 0xff;
- p[1] = 0xff;
- p[2] = 0x00;
- } else {
- p[0] = 0x00;
- p[1] = 0x00;
- p[2] = 0xff;
- }
- }
- p += 3 * elementSize;
- }
-
- if ( alphaSize > 0 )
- {
- /**
- ** +-----------+
- ** | W |
- ** | +-----+ |
- ** | | | |
- ** | | B | |
- ** | | | |
- ** | +-----+ |
- ** | |
- ** +-----------+
- **/
- int i2 = i - height / 2;
- int j2 = j - width / 2;
- int h8 = height / 8;
- int w8 = width / 8;
- if ( -h8 <= i2 && i2 <= h8 && -w8 <= j2 && j2 <= w8 ) {
- p[0] = 0x00;
- } else if ( -2 * h8 <= i2 && i2 <= 2 * h8 && -2 * w8 <= j2 && j2 <= 2 * w8 ) {
- p[0] = 0x55;
- } else if ( -3 * h8 <= i2 && i2 <= 3 * h8 && -3 * w8 <= j2 && j2 <= 3 * w8 ) {
- p[0] = 0xaa;
- } else {
- p[0] = 0xff;
- }
- p += elementSize;
- }
- }
- }
-
- glTexImage2D( GL_TEXTURE_2D, 0,
- GL_RGBA, width, height, 0,
- GL_RGBA, GL_UNSIGNED_BYTE, texImage );
-
- free( texImage );
-}
-
-
-static void drawSample( int x, int y, int w, int h,
- int texgenenabled, int coordnr )
-{
- char buf[255];
-
- glViewport( x, y, w, h );
- glScissor( x, y, w, h );
-
- glClearColor( 0.1, 0.1, 0.1, 1.0 );
- glClear( GL_COLOR_BUFFER_BIT );
-
- begin2D( w, h );
- if (texgenenabled == 2) {
- sprintf( buf, "TexCoord%df", coordnr);
- drawString( buf, 10, h - 15, labelInfoColor );
- sprintf( buf, "texgen enabled for %s coordinate(s)", coordnr == 2 ? "S" : "S/T");
- drawString( buf, 10, 5, labelInfoColor );
- }
- else if (texgenenabled == 0) {
- sprintf( buf, "TexCoord%df", coordnr);
- drawString( buf, 10, h - 15, labelInfoColor );
- drawString( "no texgen", 10, 5, labelInfoColor );
- }
- else if (texgenenabled == 1) {
- drawString( "no TexCoord", 10, h - 15, labelInfoColor );
- sprintf( buf, "texgen enabled for %s coordinate(s)",
- coordnr == 2 ? "S/T" : (coordnr == 3 ? "S/T/R" : "S/T/R/Q"));
- drawString( buf, 10, 5, labelInfoColor );
- }
-
- end2D();
-
- glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
-
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
-
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
-
- loadTexture( textureWidth, textureHeight );
-
- if ( drawTextured ) {
- glEnable( GL_TEXTURE_2D );
- }
-
- glDisable( GL_TEXTURE_GEN_S );
- glDisable( GL_TEXTURE_GEN_T );
- glDisable( GL_TEXTURE_GEN_R );
- glDisable( GL_TEXTURE_GEN_Q );
-
- glMatrixMode( GL_TEXTURE );
- glLoadIdentity();
- glMatrixMode( GL_MODELVIEW );
- glPushMatrix();
-
- switch (coordnr) {
- case 2:
- switch (texgenenabled) {
- case 0:
- glBegin( GL_QUADS );
- glTexCoord2f( 0.0, 0.0 );
- glVertex2f( -0.8, -0.8 );
-
- glTexCoord2f( 1.0, 0.0 );
- glVertex2f( 0.8, -0.8 );
-
- glTexCoord2f( 1.0, 1.0 );
- glVertex2f( 0.8, 0.8 );
-
- glTexCoord2f( 0.0, 1.0 );
- glVertex2f( -0.8, 0.8 );
- glEnd();
- break;
- case 1:
- glTranslatef( -0.8, -0.8, 0.0 );
- glScalef( 1.6, 1.6, 1.0 );
- 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, ObjPlaneS3);
- glTexGenfv(GL_T, GL_OBJECT_PLANE, ObjPlaneT3);
- glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
- glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
-
- glEnable( GL_TEXTURE_GEN_S );
- glEnable( GL_TEXTURE_GEN_T );
-
- /* Issue a texcoord here to be sure Q isn't left over from a
- * previous sample.
- */
- glTexCoord1f( 0.0 );
- 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:
- /* make sure that texgen T and non-texgen S coordinate 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, ObjPlaneS1);
- glTexGenfv(GL_T, GL_OBJECT_PLANE, nullPlane);
- glTexGenfv(GL_R, GL_OBJECT_PLANE, nullPlane);
- glTexGenfv(GL_Q, GL_OBJECT_PLANE, nullPlane);
-
- glEnable( GL_TEXTURE_GEN_S );
-
- glBegin( GL_QUADS );
- /* use z coordinate to get correct texgen values... */
- glTexCoord2f( 0.0, 0.0 );
- glVertex3f( -0.8, -0.8, 0.8 );
-
- glTexCoord2f( 0.0, 0.0 );
- glVertex3f( 0.8, -0.8, 0.2 );
-
- glTexCoord2f( 0.0, 1.0 );
- glVertex3f( 0.8, 0.8, 0.2 );
-
- glTexCoord2f( 0.0, 1.0 );
- glVertex3f( -0.8, 0.8, 0.8 );
- glEnd();
- break;
- }
- break;
- case 3:
- glMatrixMode( GL_TEXTURE );
- glLoadMatrixf( texmat_swap_rq );
- glMatrixMode( GL_MODELVIEW );
- glTranslatef( -0.8, -0.8, 0.0 );
- glScalef( 1.6, 1.6, 1.0 );
- switch (texgenenabled) {
- case 0:
- glBegin( GL_QUADS );
- glTexCoord3f( 0.0, 0.0, 0.5 );
- glVertex2f( 0.0, 0.0 );
-
- glTexCoord3f( 0.5, 0.0, 0.5 );
- glVertex2f( 1.0, 0.0 );
-
- glTexCoord3f( 0.5, 0.5, 0.5 );
- glVertex2f( 1.0, 1.0 );
-
- glTexCoord3f( 0.0, 0.5, 0.5 );
- glVertex2f( 0.0, 1.0 );
- glEnd();
- break;
- case 1:
- 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, nullPlane);
-
- glEnable( GL_TEXTURE_GEN_S );
- glEnable( GL_TEXTURE_GEN_T );
- glEnable( GL_TEXTURE_GEN_R );
-
- glTexCoord1f( 0.0 ); /* to make sure Q is 1.0 */
- glBegin( GL_QUADS );
- glVertex3f( 0.0, 0.0, 0.5 );
- glVertex3f( 1.0, 0.0, 0.5 );
- glVertex3f( 1.0, 1.0, 0.5 );
- glVertex3f( 0.0, 1.0, 0.5 );
- glEnd();
- break;
- case 2:
- /* 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 );
- glTexCoord3f( 0.0, 0.0, 0.5 );
- glVertex2f( 0.0, 0.0);
-
- glTexCoord3f( 0.0, 0.0, 0.5 );
- glVertex2f( 1.0, 0.0);
-
- glTexCoord3f( 0.0, 0.0, 0.5 );
- glVertex2f( 1.0, 1.0);
-
- glTexCoord3f( 0.0, 0.0, 0.5 );
- glVertex2f( 0.0, 1.0);
- glEnd();
- break;
- }
- break;
- case 4:
- switch (texgenenabled) {
- case 0:
- glBegin( GL_QUADS );
- /* don't need r coordinate but still setting it I'm mean */
- glTexCoord4f( 0.0, 0.0, 0.0, 0.5 );
- glVertex2f( -0.8, -0.8 );
-
- 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" );
- glewInit();
-
- 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;
-}
projects / mesa.git / blobdiff