From b3f212f745810cdcc53a6776d97d9e54af547328 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@zeromus.org>
Date: Sun, 20 Mar 2011 23:46:03 +0000
Subject: [PATCH] make sysdrawing render panel more pleasant

---
 BizHawk.Emulation/Consoles/Nintendo/NES/APU.cs | 7 +++++--
 BizHawk.Util/ViewportPanel.cs                  | 9 ++++++++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/APU.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/APU.cs
index 08296f77cb..99fbf165bd 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/APU.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/APU.cs
@@ -110,11 +110,13 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 					if (lenctr_en == 0) len_cnt = 0;
 				}
 
+				//state
 				int swp_divider_counter;
 				bool swp_silence;
 				int duty_step;
 				int timer_counter;
 				public int sample;
+				bool duty_value;
 
 				int env_start_flag, env_divider, env_counter, env_output;
 
@@ -192,13 +194,14 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 				public void Run()
 				{
 					if (timer_counter > 0) timer_counter--;
-					if (timer_counter == 0)
+					if (timer_counter == 0 && timer_raw_reload_value!=0)
 					{
 						duty_step = (duty_step + 1) & 7;
+						duty_value = PULSE_DUTY[duty_cnt, duty_step] == 1;
 						//reload timer
 						timer_counter = timer_raw_reload_value;
 					}
-					if (PULSE_DUTY[duty_cnt, duty_step] == 1) //we are outputting something
+					if (duty_value) //we are outputting something
 					{
 						sample = env_output;
 
diff --git a/BizHawk.Util/ViewportPanel.cs b/BizHawk.Util/ViewportPanel.cs
index 2c17cb39b8..4e83024702 100644
--- a/BizHawk.Util/ViewportPanel.cs
+++ b/BizHawk.Util/ViewportPanel.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.Drawing.Drawing2D;
 using System.Windows.Forms;
 
 namespace BizHawk.Core
@@ -45,8 +46,14 @@ namespace BizHawk.Core
 		protected override void OnPaint(PaintEventArgs e)
 		{
 			base.OnPaint(e);
-			if(bmp != null)
+			if (bmp != null)
+			{
+				e.Graphics.PixelOffsetMode = PixelOffsetMode.HighSpeed;
+				e.Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
+				e.Graphics.CompositingMode = CompositingMode.SourceCopy;
+				e.Graphics.CompositingQuality = CompositingQuality.HighSpeed;
 				e.Graphics.DrawImage(bmp, 0, 0, Width, Height);
+			}
 		}
 
 	}