[Mesa-dev] 3.2 bug

[Miklós Fazekas]

The following program has a bug with the current 3.2 dev build.
(Press 'c' to show the bug)

It makes an illegal-instruction error in MacOS.

Regards,
Miklos.


#include <stdlib.h>
#include "glut.h"

GLboolean usecva = GL_FALSE;

GLubyte mipmapImage32[32][32][3];
GLubyte mipmapImage16[16][16][3];
GLubyte mipmapImage8[8][8][3];
GLubyte mipmapImage4[4][4][3];
GLubyte mipmapImage2[2][2][3];
GLubyte mipmapImage1[1][1][3];

void makeImages(void)
{
    int i, j;

    for (i = 0; i < 32; i++) {
 for (j = 0; j < 32; j++) {
     mipmapImage32[i][j][0] = 255;
     mipmapImage32[i][j][1] = 255;
     mipmapImage32[i][j][2] = 0;
 }
    }
    for (i = 0; i < 16; i++) {
 for (j = 0; j < 16; j++) {
     mipmapImage16[i][j][0] = 255;
     mipmapImage16[i][j][1] = 0;
     mipmapImage16[i][j][2] = 255;
 }
    }
    for (i = 0; i < 8; i++) {
 for (j = 0; j < 8; j++) {
     mipmapImage8[i][j][0] = 255;
     mipmapImage8[i][j][1] = 0;
     mipmapImage8[i][j][2] = 0;
 }
    }
    for (i = 0; i < 4; i++) {
 for (j = 0; j < 4; j++) {
     mipmapImage4[i][j][0] = 0;
     mipmapImage4[i][j][1] = 255;
     mipmapImage4[i][j][2] = 0;
 }
    }
    for (i = 0; i < 2; i++) {
 for (j = 0; j < 2; j++) {
     mipmapImage2[i][j][0] = 0;
     mipmapImage2[i][j][1] = 0;
     mipmapImage2[i][j][2] = 255;
 }
    }
    mipmapImage1[0][0][0] = 255;
    mipmapImage1[0][0][1] = 255;
    mipmapImage1[0][0][2] = 255;
}

void myinit(void)
{
    glEnable(GL_DEPTH_TEST);
    glDisable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glShadeModel(GL_SMOOTH);

    glTranslatef(0.0, 0.0, -3.6);
    makeImages();
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexImage2D(GL_TEXTURE_2D, 0, 3, 32, 32, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage32[0][0][0]);
    glTexImage2D(GL_TEXTURE_2D, 1, 3, 16, 16, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage16[0][0][0]);
    glTexImage2D(GL_TEXTURE_2D, 2, 3, 8, 8, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage8[0][0][0]);
    glTexImage2D(GL_TEXTURE_2D, 3, 3, 4, 4, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage4[0][0][0]);
    glTexImage2D(GL_TEXTURE_2D, 4, 3, 2, 2, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage2[0][0][0]);
    glTexImage2D(GL_TEXTURE_2D, 5, 3, 1, 1, 0,
   GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage1[0][0][0]);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 GL_NEAREST_MIPMAP_NEAREST);
    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
    glEnable(GL_TEXTURE_2D);
}

void keyb(unsigned char ch,int x,int y)
{
   switch(ch)
   {
    case 'c':
     usecva = !usecva;
     glutPostRedisplay();
     break;
   }

}

void display(void)
{
    GLint i;
    GLfloat vertices[] = {-2.0, -1.0, -10.0,
               -2.0, 1.0, -10.0,
               4000.0, 1.0, -6000.0,
            4000.0, -1.0, -6000.0};

     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     i = 1;

     glVertexPointer(3,GL_FLOAT,3*4,vertices);
     glEnableClientState(GL_VERTEX_ARRAY);


     if (usecva)
       glLockArraysEXT(0,4);

     glBegin(GL_TRIANGLES);
     glColor3f(1.0,0.0,0.0);
     
     glTexCoord2f(1.0,0.0);
     glVertex2f(0,-120);
     glTexCoord2f(0.0,0.0);
     glVertex2f(640,-120);
     glTexCoord2f(0.0,1.0);
     glVertex2f(640,360);
     glEnd();


     glFlush();

     if (usecva)
       glUnlockArraysEXT();


    glutSwapBuffers();
}

void myReshape(int w, int h)
{
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0,640,0,480,0,1);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize (640, 480);
    glutCreateWindow (argv[0]);
    myinit();
    glutKeyboardFunc(keyb);
    glutReshapeFunc (myReshape);
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;             /* ANSI C requires main to return int. */
}



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