From 95ce2c5f032e740ea2e3c44f8055cb3c1f1ce8c5 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Wed, 26 Jan 2022 17:00:00 -0500
Subject: maze: Factor out wall line drawing

---
(limited to 'src/maze.c')

diff --git a/src/maze.c b/src/maze.c
index 4655405..05703a7 100644
--- a/src/maze.c
+++ b/src/maze.c
@@ -233,6 +233,24 @@ mf_maze_new(int s, int w, int h, int show_all)
 	return m;
 }
 
+static int
+_mf_maze_render_line(SDL_Renderer *renderer, int x, int y, int w, int h, int cw)
+{
+	SDL_Rect rect;
+
+	rect.x = x * cw - 1;
+	rect.y = y * cw - 1;
+	rect.w = w * cw + 2;
+	rect.h = h * cw + 2;
+	if (SDL_RenderFillRect(renderer, &rect) < 0) {
+		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+				"Couldn't draw line: %s", SDL_GetError());
+		return -1;
+	}
+
+	return 0;
+}
+
 int
 mf_maze_render(struct mf_maze *m, SDL_Renderer *renderer, SDL_Color *color,
 		int cw)
@@ -268,36 +286,16 @@ 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 (SDL_RenderDrawLine(renderer,
-							(x  ) * cw - 1, (y+1) * cw - 1,
-							(x+1) * cw    , (y+1) * cw - 1)
-						< 0 ||
-						SDL_RenderDrawLine(renderer,
-							(x  ) * cw - 1, (y+1) * cw    ,
-							(x+1) * cw    , (y+1) * cw    )
-						< 0) {
-					SDL_LogError(
-						SDL_LOG_CATEGORY_APPLICATION,
-						"Couldn't draw line: %s",
-						SDL_GetError());
+				if (_mf_maze_render_line(renderer, x  , y+1,
+							1, 0, cw) < 0) {
 					e = -1;
 				}
 			}
 			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 (SDL_RenderDrawLine(renderer,
-							(x+1) * cw - 1, (y  ) * cw - 1,
-							(x+1) * cw - 1, (y+1) * cw    )
-						< 0 ||
-						SDL_RenderDrawLine(renderer,
-							(x+1) * cw    , (y  ) * cw - 1,
-							(x+1) * cw    , (y+1) * cw    )
-						< 0) {
-					SDL_LogError(
-						SDL_LOG_CATEGORY_APPLICATION,
-						"Couldn't draw line: %s",
-						SDL_GetError());
+				if (_mf_maze_render_line(renderer, x+1, y  ,
+							0, 1, cw) < 0) {
 					e = -1;
 				}
 			}
--
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