rectangle: Introduce game_rectangle_path()

Just a tiny convenience function to draw rectangles.

3 files changed, 25 insertions, 1 deletions

diff --git a/libgame/game-geom-basics.c b/libgame/game-geom-basics.c
index 6d0e4cb..880084f 100644
--- a/libgame/game-geom-basics.c
+++ b/libgame/game-geom-basics.c
@@ -150,6 +150,25 @@ game_rectangle_resize (GameRectangle *dest, const GameRectangle *src,
   dest->y2 = src->y1 + (src->y2 - src->y1) * y;
 }
 
+
+/**
+ * game_rectangle_path:
+ * @cr: a cairo context
+ * @rect: the rectangle
+ *
+ * Adds the path of @rect to the given cairo context. This is equivalent to
+ * calling cairo_rectangle() on @cr with the coordinates of @rect.
+ **/
+void
+game_rectangle_path (cairo_t *cr, const GameRectangle *rect)
+{
+  g_return_if_fail (cr != NULL);
+  g_return_if_fail (rect != NULL);
+
+  if (GAME_RECTANGLE_IS_VALID (rect))
+    cairo_rectangle (cr, rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1);
+}
+
 /*** COLORS ***/
 
 GAME_STRUCT_AS_TYPE (GameColor, game_color)
diff --git a/libgame/game-geom-basics.h b/libgame/game-geom-basics.h
index 2325f38..57d8751 100644
--- a/libgame/game-geom-basics.h
+++ b/libgame/game-geom-basics.h
@@ -93,6 +93,9 @@ void		game_rectangle_resize		(GameRectangle *        dest,
 						 double			x,
 						 double			y);
 
+void            game_rectangle_path             (cairo_t *              cr,
+                                                 const GameRectangle *  rect);
+
 
 /* color stuff */
 GType		game_color_get_type		(void) G_GNUC_CONST;
diff --git a/libgame/game-graphic.c b/libgame/game-graphic.c
index 7363eae..c73b55b 100644
--- a/libgame/game-graphic.c
+++ b/libgame/game-graphic.c
@@ -288,8 +288,10 @@ game_graphic_draw_area_no_cache (GameGraphic *graphic, cairo_t *cr,
   GameGraphicClass *klass;
 
   cairo_save (cr);
-  cairo_rectangle (cr, rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1);
+
+  game_rectangle_path (cr, &graphic->rect);
   cairo_clip (cr);
+
   klass = GAME_GRAPHIC_GET_CLASS (graphic);
   g_return_val_if_fail (klass->draw, FALSE);
   klass->draw (graphic, cr, rect);