gdkcursor-fb.c

linux下电话本所依赖的一些图形库

  return cursor;
}

void
_gdk_cursor_destroy (GdkCursor *cursor)
{
  GdkCursorPrivateFB *private;

  g_return_if_fail (cursor != NULL);
  g_return_if_fail (cursor->ref_count == 0);

  private = (GdkCursorPrivateFB *) cursor;

  if (private->mask)
    gdk_pixmap_unref (private->mask);
  gdk_pixmap_unref (private->cursor);
  
  g_free (private);
}

/* Global data to keep track of cursor */
static GdkPixmap *last_contents = NULL;
static GdkPoint last_location, last_contents_size;
static GdkCursor *last_cursor = NULL;
static GdkFBDrawingContext *gdk_fb_cursor_dc = NULL;
static GdkFBDrawingContext cursor_dc_dat;
static GdkGC *cursor_gc;
static gint cursor_visibility_count = 1;

static GdkFBDrawingContext *
gdk_fb_cursor_dc_reset (void)
{
  if (gdk_fb_cursor_dc)
    gdk_fb_drawing_context_finalize (gdk_fb_cursor_dc);

  gdk_fb_cursor_dc = &cursor_dc_dat;
  gdk_fb_drawing_context_init (gdk_fb_cursor_dc,
			       GDK_DRAWABLE_IMPL(_gdk_parent_root),
			       cursor_gc,
			       TRUE,
			       FALSE);

  return gdk_fb_cursor_dc;
}

void
gdk_fb_cursor_hide (void)
{
  GdkFBDrawingContext *mydc = gdk_fb_cursor_dc;

  cursor_visibility_count--;
  g_assert (cursor_visibility_count <= 0);
  
  if (cursor_visibility_count < 0)
    return;

  if (!mydc)
    mydc = gdk_fb_cursor_dc_reset ();

  if (last_contents)
    {
      gdk_gc_set_clip_mask (cursor_gc, NULL);
      /* Restore old picture */
      gdk_fb_draw_drawable_3 (GDK_DRAWABLE_IMPL(_gdk_parent_root),
			      cursor_gc,
			      GDK_DRAWABLE_IMPL(last_contents),
			      mydc,
			      0, 0,
			      last_location.x,
			      last_location.y,
			      last_contents_size.x,
			      last_contents_size.y);
      gdk_shadow_fb_update (last_location.x, last_location.y,
			    last_location.x + last_contents_size.x,
			    last_location.y + last_contents_size.y);
    }
}

void
gdk_fb_cursor_invalidate (void)
{
  if (last_contents)
    {
      gdk_pixmap_unref (last_contents);
      last_contents = NULL;
    }
}

void
gdk_fb_cursor_unhide (void)
{
  GdkFBDrawingContext *mydc = gdk_fb_cursor_dc;
  GdkCursorPrivateFB *last_private;
  GdkDrawableFBData *pixmap_last;
  
  last_private = GDK_CURSOR_FB (last_cursor);
  cursor_visibility_count++;
  g_assert (cursor_visibility_count <= 1);
  if (cursor_visibility_count < 1)
    return;

  if (!mydc)
    mydc = gdk_fb_cursor_dc_reset ();

  if (last_cursor)
    {
      pixmap_last = GDK_DRAWABLE_IMPL_FBDATA (last_private->cursor);
      
      if (!last_contents ||
	  pixmap_last->width > GDK_DRAWABLE_IMPL_FBDATA (last_contents)->width ||
	  pixmap_last->height > GDK_DRAWABLE_IMPL_FBDATA (last_contents)->height)
	{
	  if (last_contents)
	    gdk_pixmap_unref (last_contents);

	  last_contents = gdk_pixmap_new (_gdk_parent_root,
					  pixmap_last->width,
					  pixmap_last->height,
					  GDK_DRAWABLE_IMPL_FBDATA (_gdk_parent_root)->depth);
	}

      gdk_gc_set_clip_mask (cursor_gc, NULL);
      gdk_fb_draw_drawable_2 (GDK_DRAWABLE_IMPL (last_contents),
			      cursor_gc,
			      GDK_DRAWABLE_IMPL (_gdk_parent_root),
			      last_location.x,
			      last_location.y,
			      0, 0,
			      pixmap_last->width,
			      pixmap_last->height,
			      TRUE, FALSE);
      last_contents_size.x = pixmap_last->width;
      last_contents_size.y = pixmap_last->height;
      
      gdk_gc_set_clip_mask (cursor_gc, last_private->mask);
      gdk_gc_set_clip_origin (cursor_gc,
			      last_location.x,
			      last_location.y);

      gdk_fb_cursor_dc_reset ();
      gdk_fb_draw_drawable_3 (GDK_DRAWABLE_IMPL (_gdk_parent_root),
			      cursor_gc,
			      GDK_DRAWABLE_IMPL (last_private->cursor),
			      mydc,
			      0, 0,
			      last_location.x, last_location.y,
			      pixmap_last->width,
			      pixmap_last->height);
      gdk_shadow_fb_update (last_location.x, last_location.y,
			    last_location.x + pixmap_last->width,
			    last_location.y + pixmap_last->height);
    }
  else
    gdk_fb_cursor_invalidate ();
}

gboolean
gdk_fb_cursor_region_need_hide (GdkRegion *region)
{
  GdkRectangle testme;

  if (!last_cursor)
    return FALSE;

  testme.x = last_location.x;
  testme.y = last_location.y;
  testme.width = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->width;
  testme.height = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->height;

  return (gdk_region_rect_in (region, &testme) != GDK_OVERLAP_RECTANGLE_OUT);
}

gboolean
gdk_fb_cursor_need_hide (GdkRectangle *rect)
{
  GdkRectangle testme;

  if (!last_cursor)
    return FALSE;

  testme.x = last_location.x;
  testme.y = last_location.y;
  testme.width = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->width;
  testme.height = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->height;

  return gdk_rectangle_intersect (rect, &testme, &testme);
}

void
gdk_fb_get_cursor_rect (GdkRectangle *rect)
{
  if (last_cursor)
    {
      rect->x = last_location.x;
      rect->y = last_location.y;
      rect->width = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->width;
      rect->height = GDK_DRAWABLE_IMPL_FBDATA (GDK_CURSOR_FB (last_cursor)->cursor)->height;
    }
  else
    {
      rect->x = rect->y = -1;
      rect->width = rect->height = 0;
    }
}

void
gdk_fb_cursor_move (gint x, gint y, GdkWindow *in_window)
{
  GdkCursor *the_cursor;

  if (!cursor_gc)
    {
      GdkColor white, black;
      cursor_gc = gdk_gc_new (_gdk_parent_root);
      gdk_color_black (gdk_colormap_get_system (), &black);
      gdk_color_white (gdk_colormap_get_system (), &white);
      gdk_gc_set_foreground (cursor_gc, &black);
      gdk_gc_set_background (cursor_gc, &white);
    }

  gdk_fb_cursor_hide ();

  if (_gdk_fb_pointer_grab_window)
    {
      if (_gdk_fb_pointer_grab_cursor)
	the_cursor = _gdk_fb_pointer_grab_cursor;
      else
	{
	  GdkWindow *win = _gdk_fb_pointer_grab_window;
	  while (!GDK_WINDOW_IMPL_FBDATA (win)->cursor && GDK_WINDOW_OBJECT (win)->parent)
	    win = (GdkWindow *)GDK_WINDOW_OBJECT (win)->parent;
	  the_cursor = GDK_WINDOW_IMPL_FBDATA (win)->cursor;
	}
    }
  else
    {
      while (!GDK_WINDOW_IMPL_FBDATA (in_window)->cursor && GDK_WINDOW_P (in_window)->parent)
	in_window = (GdkWindow *)GDK_WINDOW_P (in_window)->parent;
      the_cursor = GDK_WINDOW_IMPL_FBDATA (in_window)->cursor;
    }

  last_location.x = x - GDK_CURSOR_FB (the_cursor)->hot_x;
  last_location.y = y - GDK_CURSOR_FB (the_cursor)->hot_y;

  if (the_cursor)
    gdk_cursor_ref (the_cursor);
  if (last_cursor)
    gdk_cursor_unref (last_cursor);
  last_cursor = the_cursor;

  gdk_fb_cursor_unhide ();
}

void
gdk_fb_cursor_reset(void)
{
  GdkWindow *win = gdk_window_at_pointer (NULL, NULL);
  gint x, y;

  gdk_fb_mouse_get_info (&x, &y, NULL);
  gdk_fb_cursor_move (x, y, win);
}

GdkDisplay *
gdk_cursor_get_display (GdkCursor *cursor)
{
  return gdk_display_get_default ();
}