Bug#441071: Package libGLU1-mesa breaks compi-fusion's expo plugin
Package: libglu1-mesa
Version: 7.0.1-2
Windows drag&drop inside compiz-fusion's expo plugin doesn't work anymore since I updated libglu1-mesa from 6.5.2 to 7.0.1 .
Now moving windows inside expo plugin's viewports doesn't work.
libGLU doesn't give expected results as debugged by a compiz-fusion developer.
Attached you can find a simple program (test1.c) provided by the compiz-fusion developer used to detect the problem.
I am using Debian GNU/Linux 2.6, kernel 2.6.22+9
and libc6 2.6.1-2
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glFlush();
}
void reshape(int w, int h)
{
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective (45.0, (GLfloat) w/(GLfloat) h, 1.0, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void mouse(int button, int state, int x, int y)
{
GLint viewport[4];
GLdouble mvmatrix[16], projmatrix[16];
GLint realy; /* OpenGL y coordinate position */
GLdouble wx, wy, wz; /* returned world x, y, z coords */
GLdouble rx, ry, rz;
switch (button) {
case GLUT_LEFT_BUTTON:
if (state == GLUT_DOWN) {
glGetIntegerv (GL_VIEWPORT, viewport);
glGetDoublev (GL_MODELVIEW_MATRIX, mvmatrix);
glGetDoublev (GL_PROJECTION_MATRIX, projmatrix);
/* note viewport[3] is height of window in pixels */
realy = viewport[3] - (GLint) y - 1;
printf ("Coordinates at cursor are (%4d, %4d)\n",
x, realy);
gluUnProject ((GLdouble) x, (GLdouble) realy, 0.0,
mvmatrix, projmatrix, viewport, &wx, &wy, &wz);
printf ("World coords at z=0.0 are (%f, %f, %f)\n",
wx, wy, wz);
gluProject (wx, wy, wz, mvmatrix, projmatrix, viewport,
&rx, &ry, &rz);
printf ("Real coordinates (projected) are (%f %f %f)\n",
rx, ry, rz);
gluUnProject ((GLdouble) x, (GLdouble) realy, 1.0,
mvmatrix, projmatrix, viewport, &wx, &wy, &wz);
printf ("World coords at z=1.0 are (%f, %f, %f)\n",
wx, wy, wz);
}
break;
case GLUT_RIGHT_BUTTON:
if (state == GLUT_DOWN)
exit(0);
break;
default:
break;
}
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize (500, 500);
glutInitWindowPosition (100, 100);
glutCreateWindow (argv[0]);
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMouseFunc(mouse);
glutMainLoop();
return 0;
}
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