Exemplos de cairo_region_xor_rectangle em C++ (Cpp)

Exemplo n.º 1

Arquivo: lcairo-region.c Projeto: umibps/KABURAGI

// cairo_public cairo_status_t
// cairo_region_xor_rectangle (cairo_region_t *dst,
// 			    const cairo_rectangle_int_t *rectangle);
static int l_cairo_region_xor_rectangle (lua_State* L)
{
    cairo_region_t *dst = get_cairo_region_t (L, 1);
    const cairo_rectangle_int_t *rectangle = get_cairo_rectangle_int_t (L, 2);
    cairo_status_t v = cairo_region_xor_rectangle (dst, rectangle);
    lua_pushinteger(L, v);
    return 1;
}

Exemplo n.º 2

Arquivo: gtkpixelcache.c Projeto: aswinas/gtk-

void
_gtk_pixel_cache_set_position (GtkPixelCache         *cache,
			       cairo_rectangle_int_t *view_rect,
			       cairo_rectangle_int_t *canvas_rect)
{
  cairo_rectangle_int_t r, view_pos;
  cairo_region_t *copy_region;
  int new_surf_x, new_surf_y;
  cairo_t *backing_cr;

  if (cache->surface == NULL)
    return;

  /* Position of view inside canvas */
  view_pos.x = -canvas_rect->x;
  view_pos.y = -canvas_rect->y;
  view_pos.width = view_rect->width;
  view_pos.height = view_rect->height;

  /* Reposition so all is visible */
  if (view_pos.x < cache->surface_x ||
      view_pos.x + view_pos.width >
      cache->surface_x + cache->surface_w ||
      view_pos.y < cache->surface_y ||
      view_pos.y + view_pos.height >
      cache->surface_y + cache->surface_h)
    {
      new_surf_x = cache->surface_x;
      if (view_pos.x < cache->surface_x)
	new_surf_x = MAX (view_pos.x + view_pos.width - cache->surface_w, 0);
      else if (view_pos.x + view_pos.width >
	       cache->surface_x + cache->surface_w)
	new_surf_x = MIN (view_pos.x, canvas_rect->width - cache->surface_w);

      new_surf_y = cache->surface_y;
      if (view_pos.y < cache->surface_y)
	new_surf_y = MAX (view_pos.y + view_pos.height - cache->surface_h, 0);
      else if (view_pos.y + view_pos.height >
	       cache->surface_y + cache->surface_h)
	new_surf_y = MIN (view_pos.y, canvas_rect->height - cache->surface_h);

      r.x = 0;
      r.y = 0;
      r.width = cache->surface_w;
      r.height = cache->surface_h;
      copy_region = cairo_region_create_rectangle (&r);

      if (cache->surface_dirty)
	{
	  cairo_region_subtract (copy_region, cache->surface_dirty);
	  cairo_region_destroy (cache->surface_dirty);
	  cache->surface_dirty = NULL;
	}

      cairo_region_translate (copy_region,
			      cache->surface_x - new_surf_x,
			      cache->surface_y - new_surf_y);
      cairo_region_intersect_rectangle (copy_region, &r);

      backing_cr = cairo_create (cache->surface);
      gdk_cairo_region (backing_cr, copy_region);
      cairo_set_operator (backing_cr, CAIRO_OPERATOR_SOURCE);
      cairo_clip (backing_cr);
      cairo_push_group (backing_cr);
      cairo_set_source_surface (backing_cr, cache->surface,
				cache->surface_x - new_surf_x,
				cache->surface_y - new_surf_y);
      cairo_paint (backing_cr);
      cairo_pop_group_to_source (backing_cr);
      cairo_paint (backing_cr);
      cairo_destroy (backing_cr);

      cache->surface_x = new_surf_x;
      cache->surface_y = new_surf_y;

      cairo_region_xor_rectangle (copy_region, &r);
      cache->surface_dirty = copy_region;
    }
}