From 5abfed0347c799132e1045c0fc4724a283f6cc1d Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Sat, 28 Jan 2017 15:17:15 +1300
Subject: Refactor border/gap code

---
 plot.c   | 34 +++++-----------------------------
 plot.h   |  2 +-
 tetris.c |  1 +
 3 files changed, 7 insertions(+), 30 deletions(-)

diff --git a/plot.c b/plot.c
index 6a579d6..419513e 100644
--- a/plot.c
+++ b/plot.c
@@ -36,33 +36,13 @@ void plot_cell(unsigned int x, unsigned int y, struct colour *c)
 	);
 }
 
-void plot_cell_borders()
+void plot_clear()
 {
-	int i, j;
-
-	struct colour col = {.r = 0, .g = 0, .b = 0};
-
-	for (i = 1; i < WIDTH_CELLS; i++)
-	{
-		j = i*CELL_SIZE + (i-1)*BORDER_THICKNESS;
-		plot_rect(
-			j, 0,
-			BORDER_THICKNESS, HEIGHT_PIXELS,
-			&col);
-	}
-
-	for (i = 1; i < HEIGHT_CELLS; i++)
-	{
-		j = i*CELL_SIZE + (i-1)*BORDER_THICKNESS;
-		plot_rect(
-			0, j,
-			WIDTH_PIXELS, BORDER_THICKNESS,
-			&col);
-	}
-
+	/* blank out the background with black */
+	SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xFF);
+	SDL_RenderFillRect(renderer, NULL);
 }
 
-
 int plot_init()
 {
 	if (SDL_Init(SDL_INIT_VIDEO) < 0)
@@ -93,11 +73,7 @@ int plot_init()
 		return 1;
 	}
 
-	/* blank out the background with gray */
-	SDL_SetRenderDrawColor(renderer, 0x33, 0x33, 0x33, 0xFF);
-	SDL_RenderFillRect(renderer, NULL);
-
-	plot_cell_borders();
+	plot_clear();
 
 	return 0;
 }
diff --git a/plot.h b/plot.h
index 836c377..e73c481 100644
--- a/plot.h
+++ b/plot.h
@@ -1,6 +1,6 @@
 void plot_rect(unsigned int x, unsigned int y, unsigned int width, unsigned int height, struct colour *c);
 void plot_cell(unsigned int x, unsigned int y, struct colour *c);
-void plot_cell_borders();
+void plot_clear();
 int plot_init();
 void plot_update();
 
diff --git a/tetris.c b/tetris.c
index c94420f..ce60f21 100644
--- a/tetris.c
+++ b/tetris.c
@@ -27,6 +27,7 @@ struct colour palette[] = {
 void draw_board(struct colour* (*board)[WIDTH_CELLS][HEIGHT_CELLS])
 {
 	unsigned int x,y;
+	plot_clear();
 	for (y = 0; y < HEIGHT_CELLS; y++)
 	{
 		for (x = 0; x < WIDTH_CELLS; x++)
-- 
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