From 3dfc16e096855b5e713fb1223511302de218f45a Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Mon, 19 May 2003 14:59:03 +0000
Subject: Line bugfix

---
 lib/shape.cc | 88 +++++++++++++++++-------------------------------------------
 1 file changed, 24 insertions(+), 64 deletions(-)

(limited to 'lib')

diff --git a/lib/shape.cc b/lib/shape.cc
index 908d6d1..a626155 100644
--- a/lib/shape.cc
+++ b/lib/shape.cc
@@ -91,7 +91,7 @@ void mogltk::fill::insert(int x1, int y1, int x2, int y2) {
     
     struct segment s;
     s.x1 = x1;
-    s.y1 = y2;
+    s.y1 = y1;
     s.x2 = x2;
     s.y2 = y2;
     segments.push_back(s);
@@ -311,7 +311,9 @@ void mogltk::shape::box(int x1, int y1, int x2, int y2, ColorP c) {
 }
 
 void mogltk::shape::hline(int x1, int x2, int y, ColorP c) {
-    box(x1, y, x2, y, c);
+    for (; x1 <= x2; x1++) {
+	pixel(x1, y, c);
+    }
 }
 
 void mogltk::shape::hline3d(int x1, int x2, int y, ColorP shade1, ColorP shade2, bool bevel) {
@@ -329,7 +331,9 @@ void mogltk::shape::hline3d(int x1, int x2, int y, ColorP shade1, ColorP shade2,
 }
 
 void mogltk::shape::vline(int x, int y1, int y2, ColorP c) {
-    box(x, y1, x, y2, c);
+    for (; y1 <= y2; y1++) {
+	pixel(x, y1, c);
+    }
 }
 
 void mogltk::shape::vline3d(int x, int y1, int y2, ColorP shade1, ColorP shade2, bool bevel) {
@@ -451,6 +455,21 @@ void mogltk::shape::bsubline_4(int x1, int y1, int x2, int y2, ColorP c) {
 }
 
 void mogltk::shape::line(int x1, int y1, int x2, int y2, ColorP c) {
+    if ((x1 == x2) && (y1 == y2)) {
+	pixel(x1, y1, c);
+	return;
+    }
+
+    if (x1 == x2) {
+	vline(x1, MIN(y1, y2), MAX(y1, y2), c);
+	return;
+    }
+    
+    if (y1 == y2) {
+	hline(MIN(x1, x2), MAX(x1, x2), y1, c);
+	return;
+    }
+
     float k = float(y2 - y1) / float(x2 - x1);
     
     if ((k >= 0) && (k <= 1)) {
@@ -458,9 +477,9 @@ void mogltk::shape::line(int x1, int y1, int x2, int y2, ColorP c) {
     } else if (k > 1) {
 	bsubline_2(x1, y1, x2, y2, c);
     } else if ((k < 0) && (k >= -1)) {
-	bsubline_3(x1, y1, x2, y2, c);
-    } else {
 	bsubline_4(x1, y1, x2, y2, c);
+    } else {
+	bsubline_3(x1, y1, x2, y2, c);
     }	
 }
 
@@ -653,28 +672,6 @@ mogltk::segdrawer::~segdrawer() {
 
 void mogltk::segdrawer::step(int x1, int y1, int x2, int y2) {
     sh->line(x1 - f->GetMinX(), y1 - f->GetMinY(), x2 - f->GetMinX(), y2 - f->GetMinY(), c);
-#if 0
-    if (oldy != y) {
-        oldx = -1;
-    }
-    if (oldx == -1) {
-        oldx = x;
-    } else {
-//	s->hline(oldx, x, y, c);
-        Uint32 * p = t->GetPixels();
-        int i,
-	  first = t->GetWidth() * (y - f->GetMinY()) + oldx - f->GetMinX(),
-	  last = first - oldx + x;
-        SDL_PixelFormat * format = t->GetFormat();
-	    
-	for (i = first; i <= last; i++) {
-	    p[i] = c.toSDL(format);
-	}
-	    
-	oldx = -1;
-    }
-    oldy = y;
-#endif
 }
 
 void mogltk::shape::sdraw(fill * f, ColorP c, int sx, int sy) {
@@ -703,43 +700,6 @@ void mogltk::shape::sdraw(fill * f, ColorP c, int sx, int sy) {
     LEAVE;
 }
 
-void mogltk::shape::arc(int x0, int y0, int r, double a1, double a2, ColorP c) {
-    ENTER;
-    
-    int x = 0;
-    int y = r - 1;
-    int d = 3 - 2 * r;
-    int dI = 10 - 4 * r;
-    int rI = 6;
-    
-    while (x <= y) {
-	pixel(x0 + y, y0 - x, c); // 1
-	pixel(x0 + x, y0 - y, c); // 2
-	pixel(x0 - x, y0 - y, c); // 3
-	pixel(x0 - y, y0 - x, c); // 4
-	pixel(x0 - y, y0 + x, c); // 5
-	pixel(x0 - x, y0 + y, c); // 6
-	pixel(x0 + x, y0 + y, c); // 7
-	pixel(x0 + y, y0 + x, c); // 8
-    
-	if (d >= 0) {
-	    d += dI;
-	    dI += 8;
-	    y -= 1;
-	} else {
-	    d += rI;
-	    dI += 4;
-	}
-	rI += 4;
-	x += 1;
-    }
-
-    LEAVE;
-}
-
-void mogltk::shape::arc(int x0, int y0, int r, int x1, int y1, int x2, int y2, ColorP c) {
-}
-
 void mogltk::shape::obox(int x1, int y1, int x2, int y2, ColorP c) {
     ENTER;
 
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