From d9afcc37b8b11e33a7ff4da1dc3f0d287cef8755 Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Tue, 25 Apr 2017 16:55:19 +0200
Subject: [PATCH] fix display capture blending bugs. fancypants motion blur
 filters shouldn't look like acid trips anymore.

---
 src/GPU2D.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/GPU2D.cpp b/src/GPU2D.cpp
index 2ff94135..ce8714df 100644
--- a/src/GPU2D.cpp
+++ b/src/GPU2D.cpp
@@ -608,8 +608,8 @@ void GPU2D::DoCapture(u32 line, u32 width, u32* src)
     case 2: // sources A+B
     case 3:
         {
-            u32 eva = DispCnt & 0x1F;
-            u32 evb = (DispCnt >> 8) & 0x1F;
+            u32 eva = CaptureCnt & 0x1F;
+            u32 evb = (CaptureCnt >> 8) & 0x1F;
 
             // checkme
             if (eva > 16) eva = 16;
@@ -640,6 +640,10 @@ void GPU2D::DoCapture(u32 line, u32 width, u32* src)
                     u32 bD = ((bA * aA * eva) + (bB * aB * evb)) >> 4;
                     u32 aD = (eva>0 ? aA : 0) | (evb>0 ? aB : 0);
 
+                    if (rD > 0x1F) rD = 0x1F;
+                    if (gD > 0x1F) gD = 0x1F;
+                    if (bD > 0x1F) bD = 0x1F;
+
                     dst[dstaddr] = rD | (gD << 5) | (bD << 10) | (aD << 15);
                     srcBaddr = (srcBaddr + 1) & 0xFFFF;
                     dstaddr = (dstaddr + 1) & 0xFFFF;