static gboolean mx_fade_effect_pre_paint (ClutterEffect *effect) { MxFadeEffectPrivate *priv = MX_FADE_EFFECT (effect)->priv; if (!priv->freeze_update) { return CLUTTER_EFFECT_CLASS (mx_fade_effect_parent_class)-> pre_paint (effect); } else { ClutterActorBox box; ClutterActor *actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect)); /* Store the stage coordinates of the actor for when we post-paint */ clutter_actor_get_paint_box (actor, &box); clutter_actor_box_get_origin (&box, &priv->x_offset, &priv->y_offset); /* Connect to the paint signal so we can block it */ priv->blocked_id = g_signal_connect (actor, "paint", G_CALLBACK (mx_fade_effect_paint_cb), effect); return TRUE; } }
static void st_scroll_view_fade_paint_target (ClutterOffscreenEffect *effect) { StScrollViewFade *self = ST_SCROLL_VIEW_FADE (effect); ClutterOffscreenEffectClass *parent; CoglHandle material; gdouble value, lower, upper, page_size; ClutterActor *vscroll = st_scroll_view_get_vscroll_bar (ST_SCROLL_VIEW (self->actor)); ClutterActor *hscroll = st_scroll_view_get_hscroll_bar (ST_SCROLL_VIEW (self->actor)); gboolean h_scroll_visible, v_scroll_visible; ClutterActorBox allocation, content_box, paint_box; /* * Used to pass the fade area to the shader * * [0][0] = x1 * [0][1] = y1 * [1][0] = x2 * [1][1] = y2 * */ float fade_area[2][2]; ClutterVertex verts[4]; if (self->program == COGL_INVALID_HANDLE) goto out; clutter_actor_get_paint_box (self->actor, &paint_box); clutter_actor_get_abs_allocation_vertices (self->actor, verts); clutter_actor_get_allocation_box (self->actor, &allocation); st_theme_node_get_content_box (st_widget_get_theme_node (ST_WIDGET (self->actor)), (const ClutterActorBox *)&allocation, &content_box); /* * The FBO is based on the paint_volume's size which can be larger then the actual * allocation, so we have to account for that when passing the positions */ fade_area[0][0] = content_box.x1 + (verts[0].x - paint_box.x1); fade_area[0][1] = content_box.y1 + (verts[0].y - paint_box.y1); fade_area[1][0] = content_box.x2 + (verts[3].x - paint_box.x2); fade_area[1][1] = content_box.y2 + (verts[3].y - paint_box.y2); g_object_get (ST_SCROLL_VIEW (self->actor), "hscrollbar-visible", &h_scroll_visible, "vscrollbar-visible", &v_scroll_visible, NULL); if (v_scroll_visible) { if (st_widget_get_direction (ST_WIDGET (self->actor)) == ST_TEXT_DIRECTION_RTL) fade_area[0][0] += clutter_actor_get_width (vscroll); fade_area[1][0] -= clutter_actor_get_width (vscroll); } if (h_scroll_visible) fade_area[1][1] -= clutter_actor_get_height (hscroll); st_adjustment_get_values (self->vadjustment, &value, &lower, &upper, NULL, NULL, &page_size); if (self->offset_top_uniform > -1) { if (value > lower + 0.1) cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, self->fade_offset); else cogl_program_set_uniform_1f (self->program, self->offset_top_uniform, 0.0f); } if (self->offset_bottom_uniform > -1) { if (value < upper - page_size - 0.1) cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, self->fade_offset); else cogl_program_set_uniform_1f (self->program, self->offset_bottom_uniform, 0.0f); } if (self->tex_uniform > -1) cogl_program_set_uniform_1i (self->program, self->tex_uniform, 0); if (self->height_uniform > -1) cogl_program_set_uniform_1f (self->program, self->height_uniform, clutter_actor_get_height (self->actor)); if (self->width_uniform > -1) cogl_program_set_uniform_1f (self->program, self->width_uniform, clutter_actor_get_width (self->actor)); if (self->fade_area_uniform > -1) cogl_program_set_uniform_matrix (self->program, self->fade_area_uniform, 2, 1, FALSE, (const float *)fade_area); material = clutter_offscreen_effect_get_target (effect); cogl_material_set_user_program (material, self->program); out: parent = CLUTTER_OFFSCREEN_EFFECT_CLASS (st_scroll_view_fade_parent_class); parent->paint_target (effect); }