From 93bd25b63502f5874d080a09ad854379adf24986 Mon Sep 17 00:00:00 2001
From: Devine Lu Linvega <aliceffekt@gmail.com>
Date: Fri, 25 Sep 2020 20:18:05 -0700
Subject: [PATCH] Implemented cleanup

---
 README.md |  1 +
 nasu.c    | 77 +++++++++++++++++++++++++++++++++++++++++++------------
 2 files changed, 62 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index 84c6b1b..733f104 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ To resume working on a tileset:
 
 ### General
 
+- `~` Fix
 - `1-7` Patterns
 - `TAB` Cycle between colors
 - `H` Toggle Guides
diff --git a/nasu.c b/nasu.c
index 95cd331..45e27b0 100644
--- a/nasu.c
+++ b/nasu.c
@@ -36,13 +36,14 @@ char* modes[] = {
     "full",
     "hori",
     "veri",
-    "exes"};
+    "exes",
+    "fixe"};
 
 unsigned char buffer[SZ];
 int colors[] = {color1, color2, color3, color4, color0};
 int WIDTH = 8 * HOR * ZOOM + PAD * 2;
 int HEIGHT = 8 * VER * ZOOM + PAD * 2;
-int FPS = 30;
+int FPS = 15;
 int GUIDES = 1;
 SDL_Window* gWindow = NULL;
 SDL_Renderer* gRenderer = NULL;
@@ -107,12 +108,27 @@ redraw(uint32_t* dst)
 	SDL_RenderPresent(gRenderer);
 }
 
+int
+get(int x, int y)
+{
+	int ch1, ch2;
+	int id = (x / 8) + (y / 8) * HOR;
+	int row = (y % 8) + (id * 16);
+	int px = x % 8;
+	if(row < 0 || row > SZ - 8)
+		return 0;
+	ch1 = (buffer[row] >> (7 - px)) & 1;
+	ch2 = (buffer[row + 8] >> (7 - px)) & 1;
+	return ch1 && !ch2 ? 1 : !ch1 && ch2 ? 2 : ch1 && ch2 ? 3 : 0;
+}
+
 void
-write(int tx, int ty, int px, int py, int color)
+put(int x, int y, int color)
 {
-	int id = tx + ty * HOR;
-	int row = py + (id * 16);
-	if(row > SZ - 8)
+	int id = (x / 8) + (y / 8) * HOR;
+	int row = (y % 8) + (id * 16);
+	int px = x % 8;
+	if(x < 0 || y < 0 || x > 8 * HOR || y > 8 * VER || row > SZ - 8)
 		return;
 	if(color == 0) {
 		buffer[row] &= ~(1UL << (7 - px));
@@ -129,12 +145,23 @@ write(int tx, int ty, int px, int py, int color)
 	}
 }
 
-void
-edit(int x, int y, int color)
+int
+jagg(int x, int y)
 {
-	if(x < 0 || y < 0 || x > 8 * HOR || y > 8 * VER)
-		return;
-	write(x / 8, y / 8, x % 8, y % 8, color);
+	int n = get(x, y + 1);
+	int e = get(x + 1, y);
+	int s = get(x, y - 1);
+	int w = get(x - 1, y);
+	int h = get(x, y);
+	if(h == n && h == e && h != s && h != w)
+		return 1;
+	if(h == e && h == s && h != w && h != n)
+		return 1;
+	if(h == s && h == w && h != n && h != e)
+		return 1;
+	if(h == w && h == n && h != e && h != s)
+		return 1;
+	return 0;
 }
 
 int
@@ -156,7 +183,7 @@ patt(int x, int y, int mode, int size)
 }
 
 void
-fill(Brush* b, int mode, int size, Point p0, int color)
+fill(int mode, int size, Point p0, int color)
 {
 	int x, y;
 	Point p;
@@ -164,9 +191,8 @@ fill(Brush* b, int mode, int size, Point p0, int color)
 		for(y = -size / 2; y < size; ++y) {
 			setpt(&p, p0.x + x, p0.y + y);
 			if(patt(p.x, p.y, mode, size) && dispt(&p0, &p) < size)
-				edit(p.x, p.y, color);
+				put(p.x, p.y, color);
 		}
-	b->edit = 1;
 	redraw(pixels);
 }
 
@@ -177,7 +203,7 @@ line(Point* p0, Point* p1, int color)
 	int dy = -abs(p1->y - p0->y), sy = p0->y < p1->y ? 1 : -1;
 	int err = dx + dy, e2;
 	for(;;) {
-		edit(p0->x, p0->y, color);
+		put(p0->x, p0->y, color);
 		if(p0->x == p1->x && p0->y == p1->y)
 			break;
 		e2 = 2 * err;
@@ -193,6 +219,20 @@ line(Point* p0, Point* p1, int color)
 	redraw(pixels);
 }
 
+void
+fixe(int size, Point p0)
+{
+	int x, y;
+	Point p;
+	for(x = -size / 2; x < size; ++x)
+		for(y = -size / 2; y < size; ++y) {
+			setpt(&p, p0.x + x, p0.y + y);
+			if(jagg(p.x, p.y))
+				put(p.x, p.y, 0);
+		}
+	redraw(pixels);
+}
+
 void
 update(Brush* b)
 {
@@ -305,8 +345,10 @@ domouse(SDL_Event* event, Brush* b)
 			      (event->motion.y - PAD) / ZOOM);
 			if(b->mode == 0)
 				line(&b->prev, &b->pos, b->erase ? 0 : b->color);
+			else if(b->mode == 7)
+				fixe(b->size, b->pos);
 			else
-				fill(b, b->mode, b->size, b->pos, b->erase ? 0 : b->color);
+				fill(b->mode, b->size, b->pos, b->erase ? 0 : b->color);
 			setpt(&b->prev, b->pos.x, b->pos.y);
 		}
 		break;
@@ -336,6 +378,9 @@ dokey(SDL_Event* event, Brush* b)
 	case SDLK_n:
 		create();
 		break;
+	case SDLK_BACKQUOTE:
+		b->mode = 7;
+		break;
 	case SDLK_1:
 		b->mode = 0;
 		break;