void
twin_pixmap_show (twin_pixmap_t *pixmap,
twin_screen_t *screen,
twin_pixmap_t *lower)
{
if (pixmap->disable)
twin_screen_disable_update (screen);
if (lower == pixmap)
lower = pixmap->down;
if (pixmap->screen)
twin_pixmap_hide (pixmap);
pixmap->screen = screen;
if (lower)
{
pixmap->down = lower;
pixmap->up = lower->up;
lower->up = pixmap;
if (!pixmap->up)
screen->top = pixmap;
}
else
{
pixmap->down = NULL;
pixmap->up = screen->bottom;
screen->bottom = pixmap;
if (!pixmap->up)
screen->top = pixmap;
}
twin_pixmap_damage (pixmap, 0, 0, pixmap->width, pixmap->height);
}
void
twin_pixmap_disable_update (twin_pixmap_t *pixmap)
{
if (pixmap->disable++ == 0)
{
if (pixmap->screen)
twin_screen_disable_update (pixmap->screen);
}
}
static void
twin_screen_update_cursor(twin_screen_t *screen,
twin_coord_t x, twin_coord_t y)
{
twin_screen_disable_update(screen);
if (screen->cursor)
twin_screen_damage_cursor(screen);
screen->curs_x = x;
screen->curs_y = y;
if (screen->cursor) {
screen->cursor->x = screen->curs_x - screen->curs_hx;
screen->cursor->y = screen->curs_y - screen->curs_hy;
twin_screen_damage_cursor(screen);
}
twin_screen_enable_update(screen);
}
void
twin_screen_set_cursor (twin_screen_t *screen, twin_pixmap_t *pixmap,
twin_fixed_t hotspot_x, twin_fixed_t hotspot_y)
{
twin_screen_disable_update(screen);
if (screen->cursor)
twin_screen_damage_cursor(screen);
screen->cursor = pixmap;
screen->curs_hx = hotspot_x;
screen->curs_hy = hotspot_y;
if (pixmap) {
pixmap->x = screen->curs_x - hotspot_x;
pixmap->y = screen->curs_y - hotspot_y;
twin_screen_damage_cursor(screen);
}
twin_screen_enable_update(screen);
}