static void
paint (Data *data)
{
CoglFramebuffer *fb = data->fb;
float rotation;
cogl_framebuffer_clear4f (fb,
COGL_BUFFER_BIT_COLOR|COGL_BUFFER_BIT_DEPTH,
0, 0, 0, 1);
cogl_framebuffer_push_matrix (fb);
cogl_framebuffer_translate (fb,
data->framebuffer_width / 2,
data->framebuffer_height / 2,
0);
cogl_framebuffer_scale (fb, 75, 75, 75);
/* Update the rotation based on the time the application has been
running so that we get a linear animation regardless of the frame
rate */
rotation = g_timer_elapsed (data->timer, NULL) * 60.0f;
/* Rotate the cube separately around each axis.
*
* Note: Cogl matrix manipulation follows the same rules as for
* OpenGL. We use column-major matrices and - if you consider the
* transformations happening to the model - then they are combined
* in reverse order which is why the rotation is done last, since
* we want it to be a rotation around the origin, before it is
* scaled and translated.
*/
cogl_framebuffer_rotate (fb, rotation, 0, 0, 1);
cogl_framebuffer_rotate (fb, rotation, 0, 1, 0);
cogl_framebuffer_rotate (fb, rotation, 1, 0, 0);
cogl_framebuffer_draw_primitive (fb, data->crate_pipeline, data->prim);
cogl_framebuffer_pop_matrix (fb);
/* And finally render our Pango layouts... */
cogl_pango_show_layout (fb,
data->hello_label,
(data->framebuffer_width / 2) -
(data->hello_label_width / 2),
(data->framebuffer_height / 2) -
(data->hello_label_height / 2),
&white);
}
void
cogl_rotate (float angle, float x, float y, float z)
{
cogl_framebuffer_rotate (cogl_get_draw_framebuffer (), angle, x, y, z);
}
