diff options
Diffstat (limited to 'examples/cogl-crate.c')
| -rw-r--r-- | examples/cogl-crate.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/examples/cogl-crate.c b/examples/cogl-crate.c index 393e670a..3c9ee43a 100644 --- a/examples/cogl-crate.c +++ b/examples/cogl-crate.c @@ -24,6 +24,8 @@ typedef struct _Data GTimer *timer; + gboolean swap_ready; + } Data; /* A static identity matrix initialized for convenience. */ @@ -133,6 +135,15 @@ paint (Data *data) &white, 0); } +static void +swap_notify_cb (CoglFramebuffer *framebuffer, + void *user_data) +{ + Data *data = user_data; + + data->swap_ready = TRUE; +} + int main (int argc, char **argv) { @@ -144,6 +155,7 @@ main (int argc, char **argv) PangoRectangle hello_label_size; float fovy, aspect, z_near, z_2d, z_far; CoglDepthState depth_state; + gboolean has_swap_notify; g_type_init (); @@ -270,17 +282,41 @@ main (int argc, char **argv) cogl_push_framebuffer (fb); + data.swap_ready = TRUE; + + has_swap_notify = + cogl_has_feature (ctx, COGL_FEATURE_ID_SWAP_BUFFERS_EVENT); + + if (has_swap_notify) + cogl_framebuffer_add_swap_buffers_callback (fb, + swap_notify_cb, + &data); + while (1) { CoglPollFD *poll_fds; int n_poll_fds; gint64 timeout; - paint (&data); - cogl_framebuffer_swap_buffers (fb); + if (data.swap_ready) + { + paint (&data); + cogl_framebuffer_swap_buffers (fb); + } cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout); - g_poll ((GPollFD *) poll_fds, n_poll_fds, 0); + + if (!has_swap_notify) + { + /* If the winsys doesn't support swap event notification + then we'll just redraw constantly */ + data.swap_ready = TRUE; + timeout = 0; + } + + g_poll ((GPollFD *) poll_fds, n_poll_fds, + timeout == -1 ? -1 : timeout / 1000); + cogl_poll_dispatch (ctx, poll_fds, n_poll_fds); } |