static void
st_widget_paint (ClutterActor *actor)
{
StWidget *self = ST_WIDGET (actor);
StThemeNode *theme_node;
ClutterActorBox allocation;
theme_node = st_widget_get_theme_node (self);
clutter_actor_get_allocation_box (actor, &allocation);
st_theme_node_paint (theme_node, &allocation, clutter_actor_get_paint_opacity (actor));
}
static gboolean
setup_framebuffers (StThemeNodeTransition *transition,
const ClutterActorBox *allocation)
{
StThemeNodeTransitionPrivate *priv = transition->priv;
CoglColor clear_color = { 0, 0, 0, 0 };
guint width, height;
/* template material to avoid unnecessary shader compilation */
static CoglHandle material_template = COGL_INVALID_HANDLE;
width = priv->offscreen_box.x2 - priv->offscreen_box.x1;
height = priv->offscreen_box.y2 - priv->offscreen_box.y1;
g_return_val_if_fail (width > 0, FALSE);
g_return_val_if_fail (height > 0, FALSE);
if (priv->old_texture)
cogl_handle_unref (priv->old_texture);
priv->old_texture = cogl_texture_new_with_size (width, height,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
if (priv->new_texture)
cogl_handle_unref (priv->new_texture);
priv->new_texture = cogl_texture_new_with_size (width, height,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
g_return_val_if_fail (priv->old_texture != COGL_INVALID_HANDLE, FALSE);
g_return_val_if_fail (priv->new_texture != COGL_INVALID_HANDLE, FALSE);
if (priv->old_offscreen)
cogl_handle_unref (priv->old_offscreen);
priv->old_offscreen = cogl_offscreen_new_to_texture (priv->old_texture);
if (priv->new_offscreen)
cogl_handle_unref (priv->new_offscreen);
priv->new_offscreen = cogl_offscreen_new_to_texture (priv->new_texture);
g_return_val_if_fail (priv->old_offscreen != COGL_INVALID_HANDLE, FALSE);
g_return_val_if_fail (priv->new_offscreen != COGL_INVALID_HANDLE, FALSE);
if (priv->material == NULL)
{
if (G_UNLIKELY (material_template == COGL_INVALID_HANDLE))
{
material_template = cogl_material_new ();
cogl_material_set_layer_combine (material_template, 0,
"RGBA = REPLACE (TEXTURE)",
NULL);
cogl_material_set_layer_combine (material_template, 1,
"RGBA = INTERPOLATE (PREVIOUS, "
"TEXTURE, "
"CONSTANT[A])",
NULL);
cogl_material_set_layer_combine (material_template, 2,
"RGBA = MODULATE (PREVIOUS, "
"PRIMARY)",
NULL);
}
priv->material = cogl_material_copy (material_template);
}
cogl_material_set_layer (priv->material, 0, priv->new_texture);
cogl_material_set_layer (priv->material, 1, priv->old_texture);
cogl_push_framebuffer (priv->old_offscreen);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR);
cogl_ortho (priv->offscreen_box.x1, priv->offscreen_box.x2,
priv->offscreen_box.y2, priv->offscreen_box.y1,
0.0, 1.0);
st_theme_node_paint (priv->old_theme_node, allocation, 255);
cogl_pop_framebuffer ();
cogl_push_framebuffer (priv->new_offscreen);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR);
cogl_ortho (priv->offscreen_box.x1, priv->offscreen_box.x2,
priv->offscreen_box.y2, priv->offscreen_box.y1,
0.0, 1.0);
st_theme_node_paint (priv->new_theme_node, allocation, 255);
cogl_pop_framebuffer ();
return TRUE;
}
