From 5a2fb468527f703cb1d2cb12fd0538498902016f Mon Sep 17 00:00:00 2001
From: Mike Buland <Mike.Buland@mjfirm.com>
Date: Thu, 20 Oct 2016 07:20:25 -0600
Subject: We can draw lines now!

---
 src/image.cpp | 30 ++++++++++++++++++++++++++++++
 src/image.h   |  3 +++
 2 files changed, 33 insertions(+)

diff --git a/src/image.cpp b/src/image.cpp
index 384de9a..122df65 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <png.h>
+#include <math.h>
 
 Image::Image() :
     iWidth( 0 ),
@@ -27,6 +28,16 @@ Image::~Image()
     delete[] pPix;
 }
 
+int Image::getWidth() const
+{
+    return iWidth;
+}
+
+int Image::getHeight() const
+{
+    return iHeight;
+}
+
 void Image::clear( uint8_t uColor )
 {
     memset( pPix, uColor, iWidth*iHeight );
@@ -139,5 +150,24 @@ void Image::drawLine( int32_t x1, int32_t y1, int32_t x2, int32_t y2, uint8_t uC
             set( j, y1, uColor );
         }
     }
+    else
+    {
+        int xd = x2-x1;
+        int yd = y2-y1;
+        float d = sqrt( xd*xd + yd*yd );
+        float ux = xd/d;
+        float uy = yd/d;
+
+        float x = x1;
+        float y = y1;
+
+        set( (int)x, (int)y, uColor );
+        for( float n = 0.0; n < d; n += 1.0 )
+        {
+            x += ux;
+            y += uy;
+            set( (int)x, (int)y, uColor );
+        }
+    }
 }
 
diff --git a/src/image.h b/src/image.h
index cdc13e0..e107712 100644
--- a/src/image.h
+++ b/src/image.h
@@ -10,6 +10,9 @@ public:
     Image( int32_t iWidth, int32_t iHeight );
     virtual ~Image();
 
+    int getWidth() const;
+    int getHeight() const;
+
     void clear( uint8_t uColor=0 );
     void set( int32_t x, int32_t y, uint8_t iCol );
 
-- 
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