diff --git a/examples/cogl-hello.c b/examples/cogl-hello.c index 4e3d5e243..051f141e0 100644 --- a/examples/cogl-hello.c +++ b/examples/cogl-hello.c @@ -2,51 +2,80 @@ #include #include -CoglColor black; +typedef struct _Data +{ + CoglContext *ctx; + CoglFramebuffer *fb; + CoglPrimitive *triangle; + CoglPipeline *pipeline; +} Data; + +static gboolean +paint_cb (void *user_data) +{ + Data *data = user_data; + + cogl_framebuffer_clear4f (data->fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1); + cogl_framebuffer_draw_primitive (data->fb, data->pipeline, data->triangle); + cogl_onscreen_swap_buffers (COGL_ONSCREEN (data->fb)); + + /* If the driver can deliver swap complete events then we can remove + * the idle paint callback until we next get a swap complete event + * otherwise we keep the idle paint callback installed and simply + * paint as fast as the driver will allow... */ + if (cogl_has_feature (data->ctx, COGL_FEATURE_ID_SWAP_BUFFERS_EVENT)) + return FALSE; /* remove the callback */ + else + return TRUE; +} + +static void +swap_complete_cb (CoglFramebuffer *framebuffer, void *user_data) +{ + g_idle_add (paint_cb, user_data); +} int main (int argc, char **argv) { - CoglContext *ctx; + Data data; CoglOnscreen *onscreen; - CoglFramebuffer *fb; - CoglPipeline *pipeline; GError *error = NULL; CoglVertexP2C4 triangle_vertices[] = { {0, 0.7, 0xff, 0x00, 0x00, 0x80}, {-0.7, -0.7, 0x00, 0xff, 0x00, 0xff}, {0.7, -0.7, 0x00, 0x00, 0xff, 0xff} }; - CoglPrimitive *triangle; + GSource *cogl_source; + GMainLoop *loop; - ctx = cogl_context_new (NULL, &error); - if (!ctx) { + data.ctx = cogl_context_new (NULL, &error); + if (!data.ctx) { fprintf (stderr, "Failed to create context: %s\n", error->message); return 1; } - onscreen = cogl_onscreen_new (ctx, 640, 480); + onscreen = cogl_onscreen_new (data.ctx, 640, 480); cogl_onscreen_show (onscreen); - fb = COGL_FRAMEBUFFER (onscreen); + data.fb = COGL_FRAMEBUFFER (onscreen); - triangle = cogl_primitive_new_p2c4 (ctx, COGL_VERTICES_MODE_TRIANGLES, - 3, triangle_vertices); + data.triangle = cogl_primitive_new_p2c4 (data.ctx, + COGL_VERTICES_MODE_TRIANGLES, + 3, triangle_vertices); + data.pipeline = cogl_pipeline_new (data.ctx); - pipeline = cogl_pipeline_new (ctx); + cogl_source = cogl_glib_source_new (data.ctx, G_PRIORITY_DEFAULT); - for (;;) { - CoglPollFD *poll_fds; - int n_poll_fds; - gint64 timeout; + g_source_attach (cogl_source, NULL); - cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1); - cogl_framebuffer_draw_primitive (fb, pipeline, triangle); - cogl_onscreen_swap_buffers (onscreen); + if (cogl_has_feature (data.ctx, COGL_FEATURE_ID_SWAP_BUFFERS_EVENT)) + cogl_onscreen_add_swap_buffers_callback (COGL_ONSCREEN (data.fb), + swap_complete_cb, &data); - cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout); - g_poll ((GPollFD *) poll_fds, n_poll_fds, 0); - cogl_poll_dispatch (ctx, poll_fds, n_poll_fds); - } + g_idle_add (paint_cb, &data); + + loop = g_main_loop_new (NULL, TRUE); + g_main_loop_run (loop); return 0; }