static void
gimp_projection_idle_render_init (GimpProjection *proj)
{
GSList *list;
/* We need to merge the IdleRender's and the GimpProjection's update_areas
* list to keep track of which of the updates have been flushed and hence
* need to be drawn.
*/
for (list = proj->update_areas; list; list = g_slist_next (list))
{
GimpArea *area = list->data;
proj->idle_render.update_areas =
gimp_area_list_process (proj->idle_render.update_areas,
gimp_area_new (area->x1, area->y1,
area->x2, area->y2));
}
/* If an idlerender was already running, merge the remainder of its
* unrendered area with the update_areas list, and make it start work
* on the next unrendered area in the list.
*/
if (proj->idle_render.idle_id)
{
GimpArea *area =
gimp_area_new (proj->idle_render.base_x,
proj->idle_render.y,
proj->idle_render.base_x + proj->idle_render.width,
proj->idle_render.y + (proj->idle_render.height -
(proj->idle_render.y -
proj->idle_render.base_y)));
proj->idle_render.update_areas =
gimp_area_list_process (proj->idle_render.update_areas, area);
gimp_projection_idle_render_next_area (proj);
}
else
{
if (proj->idle_render.update_areas == NULL)
{
g_warning ("%s: wanted to start idle render with no update_areas",
G_STRFUNC);
return;
}
gimp_projection_idle_render_next_area (proj);
proj->idle_render.idle_id =
g_idle_add_full (GIMP_PROJECTION_IDLE_PRIORITY,
gimp_projection_idle_render_callback, proj,
NULL);
}
}
static void
gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GimpArea *area;
gint off_x, off_y;
gint width, height;
gimp_projectable_get_offset (proj->projectable, &off_x, &off_y);
gimp_projectable_get_size (proj->projectable, &width, &height);
/* subtract the projectable's offsets because the list of update
* areas is in tile-pyramid coordinates, but our external API is
* always in terms of image coordinates.
*/
x -= off_x;
y -= off_y;
area = gimp_area_new (CLAMP (x, 0, width),
CLAMP (y, 0, height),
CLAMP (x + w, 0, width),
CLAMP (y + h, 0, height));
proj->update_areas = gimp_area_list_process (proj->update_areas, area);
}
void
gimp_display_update_area (GimpDisplay *display,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
g_return_if_fail (GIMP_IS_DISPLAY (display));
if (now)
{
gimp_display_paint_area (display, x, y, w, h);
}
else
{
GimpArea *area = gimp_area_new (CLAMP (x, 0, display->image->width),
CLAMP (y, 0, display->image->height),
CLAMP (x + w, 0, display->image->width),
CLAMP (y + h, 0, display->image->height));
display->update_areas = gimp_area_list_process (display->update_areas,
area);
}
}
