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handle framerate differently and print it to stderr for debugging

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This commit is contained in:
Ray Strode 2007-05-24 17:31:44 -04:00
parent 5b22da9d14
commit 65a6735c92
1 changed files with 32 additions and 7 deletions
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39
src/ply-image.c
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@ -308,6 +308,9 @@ get_current_time (void)
return timestamp;
}
double start_time = 0.0;
int num_frames = 0;
static void
animate_at_time (ply_frame_buffer_t *buffer,
ply_image_t *image,
@ -332,6 +335,7 @@ animate_at_time (ply_frame_buffer_t *buffer,
opacity = .5 * sin ((time / 4) * (2 * M_PI)) + .8;
opacity = CLAMP (opacity, 0, 1.0);
num_frames++;
if (fabs (opacity - last_opacity) <= DBL_MIN)
return;
@ -342,16 +346,27 @@ animate_at_time (ply_frame_buffer_t *buffer,
ply_frame_buffer_fill_with_argb32_data_at_opacity (buffer, &area,
0, 0, width, height,
data, opacity);
if (!ply_frame_buffer_unpause_updates (buffer))
fprintf (stderr, "WARNING: could not unpause updates '%s'\n",
strerror (errno));
ply_frame_buffer_unpause_updates (buffer);
}
static void
on_death ()
{
ioctl (1, KDSETMODE, KD_TEXT);
exit (0);
_exit (0);
}
static void
on_alarm ()
{
if (num_frames == 0)
return;
fprintf (stderr, "%f\n",
num_frames / (get_current_time () - start_time));
alarm (2);
}
int
@ -361,7 +376,6 @@ main (int argc,
ply_image_t *image;
ply_frame_buffer_t *buffer;
int exit_code;
double start_time;
exit_code = 0;
@ -381,9 +395,13 @@ main (int argc,
ioctl (1, KDSETMODE, KD_GRAPHICS);
signal (SIGINT, exit);
signal (SIGTERM, on_death);
atexit (on_death);
signal (SIGALRM, on_alarm);
alarm (2);
buffer = ply_frame_buffer_new (NULL);
if (!ply_frame_buffer_open (buffer))
@ -397,8 +415,15 @@ main (int argc,
ply_frame_buffer_fill_with_color (buffer, NULL, 0.1, 0.1, .7, 1.0);
while ("we want to see ad-hoc animations")
{
animate_at_time (buffer, image, get_current_time () - start_time);
usleep ((long) (1000000 / FRAMES_PER_SECOND));
long sleep_time;
double now;
now = get_current_time ();
animate_at_time (buffer, image, now - start_time);
sleep_time = 1000000 / FRAMES_PER_SECOND;
sleep_time = MAX (sleep_time - ((get_current_time () - now) / 1000000),
10000);
usleep (sleep_time);
}
ply_frame_buffer_close (buffer);
ply_frame_buffer_free (buffer);