brush x and y flipping

4 files changed, 45 insertions, 1 deletions

diff --git a/inc/grid.h b/inc/grid.h
index fa421e6..d2d10c0 100644
--- a/inc/grid.h
+++ b/inc/grid.h
@@ -18,3 +18,6 @@ Grid *grid_load(const char *path);
 void grid_clear(Grid *this);
 void grid_resize(Grid *this, int width, int height);
 void grid_draw(Grid *this, Tileset *tset, Window *win, int x, int y);
+void grid_swap(Grid *this, int x0, int y0, int x1, int y1);
+void grid_flip_x(Grid *this);
+void grid_flip_y(Grid *this);
diff --git a/inc/window.h b/inc/window.h
index b4e04b1..a06f48d 100644
--- a/inc/window.h
+++ b/inc/window.h
@@ -18,7 +18,7 @@ struct Window {
 	bool in_focus;
 	int mouse_x;
 	int mouse_y;
-	bool clicked;
+	int clicked;
 	int clicked_x;
 	int clicked_y;
 	void (*fn_event)(Window *this, struct Root *root, SDL_Event *e);
diff --git a/src/editor.c b/src/editor.c
index 664da15..2aed6be 100644
--- a/src/editor.c
+++ b/src/editor.c
@@ -2,6 +2,7 @@
 
 static void _ev_mousemotion(Window *this, Root *root, SDL_MouseMotionEvent *e);
 static void _ev_mouse(Window *this, Root *root);
+static void _ev_key(Window *this, Root *root);
 
 void
 editor_redraw(Window *this, Root *root)
@@ -54,6 +55,9 @@ editor_event(Window *this, Root *root, SDL_Event *e)
 		_ev_mouse(this, root);
 		this->redraw = true;
 		break;
+	case SDL_KEYDOWN:
+		_ev_key(this, root);
+		break;
 	case SDL_WINDOWEVENT:
 		if (e->window.event == SDL_WINDOWEVENT_LEAVE)
 			this->clicked = false;
@@ -132,3 +136,16 @@ _ev_mouse(Window *this, Root *root)
 		}
 	}
 }
+
+static void
+_ev_key(Window *this, Root *root)
+{
+	Input *const input = &this->input;
+	if (input_key_pressed(input, SDL_SCANCODE_F)) {
+		if (input_key_down(input, SDL_SCANCODE_LSHIFT))
+			grid_flip_y(root->brush);
+		else
+			grid_flip_x(root->brush);
+		this->redraw = true;
+	}
+}
diff --git a/src/grid.c b/src/grid.c
index 0fb1999..e13f857 100644
--- a/src/grid.c
+++ b/src/grid.c
@@ -160,3 +160,27 @@ grid_draw(Grid *this, Tileset *tset, Window *win, int x, int y)
 		}
 	}
 }
+
+void
+grid_swap(Grid *this, int x0, int y0, int x1, int y1)
+{
+	const int tmp = grid_get(this, x0, y0);
+	grid_set(this, x0, y0, grid_get(this, x1, y1));
+	grid_set(this, x1, y1, tmp);
+}
+
+void
+grid_flip_x(Grid *this)
+{
+	forloop (y, 0, this->height)
+		forloop (x, 0, (this->width + 1) / 2)
+			grid_swap(this, x, y, this->width - 1 - x, y);
+}
+
+void
+grid_flip_y(Grid *this)
+{
+	forloop (x, 0, this->width)
+		forloop (y, 0, (this->height + 1) / 2)
+			grid_swap(this, x, y, x, this->height - 1 - y);
+}