From 4ec716103270459a978fe1e6c699db5bfd5ae6cc Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Wed, 27 Apr 2005 20:29:19 +0000
Subject: Patch #1186744 (Common line-drawing function)

svn-id: r17842
---
 sword2/build_display.h   |  1 -
 sword2/driver/render.cpp | 45 +++------------------------------------------
 2 files changed, 3 insertions(+), 43 deletions(-)

(limited to 'sword2')

diff --git a/sword2/build_display.h b/sword2/build_display.h
index 11b25e6694..76853bcf7e 100644
--- a/sword2/build_display.h
+++ b/sword2/build_display.h
@@ -417,7 +417,6 @@ public:
 
 	void plotPoint(int x, int y, uint8 colour);
 	void drawLine(int x0, int y0, int x1, int y1, uint8 colour);
-	void drawLine(int x0, int y0, int x1, int y1, int color, void (*plotProc)(int, int, int, void *), void *data);
 
 #ifdef BACKEND_8BIT
 	void plotYUV(byte *lut, int width, int height, byte *const *dat);
diff --git a/sword2/driver/render.cpp b/sword2/driver/render.cpp
index 0cb20b0291..f2030a295f 100644
--- a/sword2/driver/render.cpp
+++ b/sword2/driver/render.cpp
@@ -21,6 +21,8 @@
 #include "common/stdafx.h"
 #include "common/system.h"
 
+#include "graphics/primitives.h"
+
 #include "sword2/sword2.h"
 #include "sword2/defs.h"
 #include "sword2/build_display.h"
@@ -225,48 +227,7 @@ static void plot(int x, int y, int colour, void *data) {
  */
 
 void Screen::drawLine(int x0, int y0, int x1, int y1, uint8 colour) {
-	drawLine(x0, y0, x1, y1, colour, &plot, this);
-}
-
-// TODO: Main line-drawing function. Move this somewhere where other engines
-//	 can benefit from it.
-
-void Screen::drawLine(int x0, int y0, int x1, int y1, int color, void (*plotProc)(int, int, int, void *), void *data) {
-	// Bresenham's line algorithm, as described by Wikipedia
-	bool steep = ABS(y1 - y0) > ABS(x1 - x0);
-
-	if (steep) {
-		SWAP(x0, y0);
-		SWAP(x1, y1);
-	}
-
-	int delta_x = ABS(x1 - x0);
-	int delta_y = ABS(y1 - y0);
-	int err = 0;
-	int delta_err = delta_y;
-	int x = x0;
-	int y = y0;
-
-	int x_step = (x0 < x1) ? 1 : -1;
-	int y_step = (y0 < y1) ? 1 : -1;
-
-	if (steep)
-		(*plotProc)(y, x, color, data);
-	else
-		(*plotProc)(x, y, color, data);
-
-	while (x != x1) {
-		x += x_step;
-		err += delta_err;
-		if (2 * err > delta_x) {
-			y += y_step;
-			err -= delta_x;
-		}
-		if (steep)
-			(*plotProc)(y, x, color, data);
-		else
-			(*plotProc)(x, y, color, data);
-	}
+	Graphics::drawLine(x0, y0, x1, y1, colour, &plot, this);
 }
 
 /**
-- 
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