From 0ae9e8013b184627894ff4f1b863a937a0bd2d9a Mon Sep 17 00:00:00 2001
From: Bart Trzynadlowski <bart.trzy@gmail.com>
Date: Thu, 28 Apr 2016 01:27:35 +0000
Subject: [PATCH] Fixed polygon header bit analysis code: was forgetting to
 swap GL buffer back to retrieve pixels from last rendered frame

---
 Src/OSD/SDL/Main.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Src/OSD/SDL/Main.cpp b/Src/OSD/SDL/Main.cpp
index 45b4869..8d5b2f3 100644
--- a/Src/OSD/SDL/Main.cpp
+++ b/Src/OSD/SDL/Main.cpp
@@ -471,8 +471,10 @@ static void TestPolygonHeaderBits(IEmulator *Emu)
       if ((unknownPolyBits[idx] & mask))
       {
         Emu->RenderFrame();
+        SDL_GL_SwapBuffers(); // swap the buffer second time to get back rendered frame
         std::string file = Util::Format() << "Analysis/" << GetFileBaseName(s_gfxStatePath) << "." << idx << "_" << Util::Hex(mask) << ".bmp";
         SaveFrameBuffer(file);
+        SDL_GL_SwapBuffers(); // show some visual feedback
       }
     }
   }