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From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz
[xscreensaver]
/
hacks
/
glx
/
cubetwist.c
diff --git
a/hacks/glx/cubetwist.c
b/hacks/glx/cubetwist.c
index 8205561e723587596f853ce7e7558a65a2fe6c9c..6e11f01faec68d9d3aafebab69ef87bc624873d8 100644
(file)
--- a/
hacks/glx/cubetwist.c
+++ b/
hacks/glx/cubetwist.c
@@
-1,4
+1,4
@@
-/* cubetwist, Copyright (c) 2016 Jamie Zawinski <jwz@jwz.org>
+/* cubetwist, Copyright (c) 2016
-2017
Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
@@
-15,6
+15,7
@@
"*suppressRotationAnimation: True\n" \
# define refresh_cube 0
"*suppressRotationAnimation: True\n" \
# define refresh_cube 0
+# define release_cube 0
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
@@
-130,7
+131,6
@@
draw_cubes (ModeInfo *mi, cube *c)
int polys = 0;
int i, j;
int polys = 0;
int i, j;
- glPushMatrix();
glColor4fv (c->color);
glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, c->color);
glColor4fv (c->color);
glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, c->color);
@@
-153,6
+153,8
@@
draw_cubes (ModeInfo *mi, cube *c)
if (c->next)
{
if (c->next)
{
+ /* This leaves rotations on the prevailing matrix stack, but since
+ this is a tail-call, that's fine. Don't blow the matrix stack. */
glRotatef (c->rot.x, 1, 0, 0);
glRotatef (c->rot.y, 0, 1, 0);
glRotatef (c->rot.z, 0, 0, 1);
glRotatef (c->rot.x, 1, 0, 0);
glRotatef (c->rot.y, 0, 1, 0);
glRotatef (c->rot.z, 0, 0, 1);
@@
-161,8
+163,8
@@
draw_cubes (ModeInfo *mi, cube *c)
c->next->rot = c->rot;
polys += draw_cubes (mi, c->next);
}
c->next->rot = c->rot;
polys += draw_cubes (mi, c->next);
}
- glPopMatrix();
+ check_gl_error("cubetwist");
return polys;
}
return polys;
}
@@
-415,20
+417,15
@@
cube_handle_event (ModeInfo *mi, XEvent *event)
}
}
+static void free_cube (ModeInfo *mi);
+
ENTRYPOINT void
init_cube (ModeInfo *mi)
{
cube_configuration *bp;
int wire = MI_IS_WIREFRAME(mi);
ENTRYPOINT void
init_cube (ModeInfo *mi)
{
cube_configuration *bp;
int wire = MI_IS_WIREFRAME(mi);
- if (!bps) {
- bps = (cube_configuration *)
- calloc (MI_NUM_SCREENS(mi), sizeof (cube_configuration));
- if (!bps) {
- fprintf(stderr, "%s: out of memory\n", progname);
- exit(1);
- }
- }
+ MI_INIT (mi, bps, free_cube);
bp = &bps[MI_SCREEN(mi)];
bp = &bps[MI_SCREEN(mi)];
@@
-569,8
+566,8
@@
draw_cube (ModeInfo *mi)
glXSwapBuffers(dpy, window);
}
glXSwapBuffers(dpy, window);
}
-
ENTRYPOINT
void
-
releas
e_cube (ModeInfo *mi)
+
static
void
+
fre
e_cube (ModeInfo *mi)
{
cube_configuration *bp = &bps[MI_SCREEN(mi)];
while (bp->cubes)
{
cube_configuration *bp = &bps[MI_SCREEN(mi)];
while (bp->cubes)