From c8b5065a45bc098d1c7dde0d88f6f78793223928 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Wed, 26 Jan 2022 17:15:20 -0500
Subject: maze: Factor out border line drawing

---
(limited to 'src')

diff --git a/src/maze.c b/src/maze.c
index 05703a7..a59b4e9 100644
--- a/src/maze.c
+++ b/src/maze.c
@@ -234,7 +234,7 @@ mf_maze_new(int s, int w, int h, int show_all)
 }
 
 static int
-_mf_maze_render_line(SDL_Renderer *renderer, int x, int y, int w, int h, int cw)
+_mf_maze_draw_line(SDL_Renderer *renderer, int x, int y, int w, int h, int cw)
 {
 	SDL_Rect rect;
 
@@ -252,8 +252,7 @@ _mf_maze_render_line(SDL_Renderer *renderer, int x, int y, int w, int h, int cw)
 }
 
 int
-mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
-		int cw)
+mf_maze_render(struct mf_maze *m, SDL_Renderer *r, SDL_Color *color, int cw)
 {
 	int e;
 	int x;
@@ -261,7 +260,7 @@ mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
 
 	e = 0;
 
-	if (SDL_SetRenderDrawColor(renderer,
+	if (SDL_SetRenderDrawColor(r,
 				color->r, color->g, color->b, color->a) < 0) {
 		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
 				"Couldn't set drawing color: %s",
@@ -269,15 +268,11 @@ mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
 		e = -1;
 	}
 
-	x = m->w * cw - 1;
-	y = m->h * cw - 1;
 	if (
-			SDL_RenderDrawLine(renderer, 0, 0, x, 0) < 0 ||
-			SDL_RenderDrawLine(renderer, 0, y, x, y) < 0 ||
-			SDL_RenderDrawLine(renderer, 0, 0, 0, y) < 0 ||
-			SDL_RenderDrawLine(renderer, x, 0, x, y) < 0) {
-		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
-				"Couldn't draw line: %s", SDL_GetError());
+			_mf_maze_draw_line(r, 0,    0,    m->w, 0,    cw) < 0 ||
+			_mf_maze_draw_line(r, 0,    m->h, m->w, 0,    cw) < 0 ||
+			_mf_maze_draw_line(r, 0,    0,    0,    m->h, cw) < 0 ||
+			_mf_maze_draw_line(r, m->w, 0,    0,    m->h, cw) < 0) {
 		e = -1;
 	}
 
@@ -286,7 +281,7 @@ mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
 			if (y < m->h - 1 && mf_maze_is_wall(m, x, y, 0, 1) &&
 					_mf_maze_revealed_wall(m, x, y, 0, 1)) {
 				/* Draw h line */
-				if (_mf_maze_render_line(renderer, x  , y+1,
+				if (_mf_maze_draw_line(r, x  , y+1,
 							1, 0, cw) < 0) {
 					e = -1;
 				}
@@ -294,7 +289,7 @@ mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
 			if (x < m->w - 1 && mf_maze_is_wall(m, x, y, 1, 0) &&
 					_mf_maze_revealed_wall(m, x, y, 1, 0)) {
 				/* Draw v line */
-				if (_mf_maze_render_line(renderer, x+1, y  ,
+				if (_mf_maze_draw_line(r, x+1, y  ,
 							0, 1, cw) < 0) {
 					e = -1;
 				}
diff --git a/src/maze.h b/src/maze.h
index 4482f67..fb96358 100644
--- a/src/maze.h
+++ b/src/maze.h
@@ -41,8 +41,7 @@ struct mf_maze *
 mf_maze_new(int s, int w, int h, int show_all);
 
 int
-mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
-		int cw);
+mf_maze_render(struct mf_maze *m, SDL_Renderer *r, SDL_Color *color, int cw);
 
 void
 mf_maze_destroy(struct mf_maze **m_p);
--
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