It all works but damn its slowwww

include/olcPixelGameEngine.hpp

@@ -2118,7 +2118,7 @@ namespace olc
 				{
 					fFrameTimer -= 1.0f;
 
-					std::string sTitle = "OneLoneCoder.com - Pixel Game Engine - " + sAppName + " - FPS: " + std::to_string( nFrameCount );
+					std::string sTitle = sAppName + " - FPS: " + std::to_string( nFrameCount );
 #if defined(_WIN32)
 #ifdef UNICODE
 					SetWindowText( olc_hWnd, ConvertS2W( sTitle ).c_str() );

src/display.cpp

@@ -68,7 +68,41 @@ bool Aeon::Display::OnUserUpdate( float fElapsedTime )
 
 	if ( mNewFrame )
 	{
-		
+
+		if ( mNextFrame == nullptr )
+		{
+			mNewFrame = false;
+			return true;
+		}
+
+		for ( int x = 0; x < mNextFrame->w; x++ )
+		for ( int y = 0; y < mNextFrame->w; y++ )
+		{
+			// tonemap, gamma correct and write
+			// colours are assumed to input as HDR
+
+			auto Clamp = []( glm::vec3 p, float max, float min ) -> glm::vec3
+			{
+				glm::vec3 ret;
+				ret.r = std::max( min, std::min( p.r, max ) );
+				ret.g = std::max( min, std::min( p.g, max ) );
+				ret.b = std::max( min, std::min( p.b, max ) );
+				return ret;
+			};
+
+			// Just clamping now
+			glm::vec3 p = Clamp( mNextFrame->At( x, y ), 1.0f, 0.0f );
+
+			// Gamma correction
+			static const float Gamma = 1.0f / 2.2f;
+
+			olc::Pixel pix(
+				(uint8_t)( pow( p.r, Gamma ) * 255.0f ),
+				(uint8_t)( pow( p.g, Gamma ) * 255.0f ),
+				(uint8_t)( pow( p.b, Gamma ) * 255.0f ) );
+
+			DrawRect( x, y, 1, 1, pix );
+		}
 
 		mNextFrame = nullptr;
 		mNewFrame = false;

src/display.hpp

@@ -24,7 +24,7 @@ struct DisplayBuff
 // for the time being NEEDS to run on main thread
 class Display : public olc::PixelGameEngine
 {
-
+public:
 	Display();
 	void Init( int x, int y );
 	void Init( int x, int y, std::string title );

src/main.cpp

@@ -1,32 +1,39 @@
 #define OLC_PGE_APPLICATION
 
-class Application : public olc::PixelGameEngine
+#include "display.hpp"
+
+#include <thread>
+#include <chrono>
+
+void EngineThread( Aeon::Display* disp )
 {
-public:
-	Application()
+	Aeon::DisplayBuff buf( 500, 500 );
+	while ( true )
 	{
-		sAppName = "2D Global Illumination";
+
+		for ( int x = 0; x < 500; x++ )
+		for ( int y = 0; y < 500; y++ )
+			buf.Set( x, y, { (float)( rand() % 255 ) / 255.0f,
+						  (float)( rand() % 255 ) / 255.0f,
+						  (float)( rand() % 255 ) / 255.0f } );
+
+		disp->NewFrame( &buf );
+
+		static std::chrono::milliseconds dura( 10 );
+		std::this_thread::sleep_for( dura );
 	}
-
-	bool OnUserCreate() override
-	{
-		return true;
-	}
-
-	bool OnUserUpdate( float fElapsedTime ) override
-	{
-		for ( int x = 0; x < ScreenWidth(); x++ )
-			for ( int y = 0; y < ScreenHeight(); y++ )
-				Draw( x, y, olc::Pixel( x % 255, y % 255, rand() % 255 ) );
-
-		return true;
-	}
-
-};
+}
 
 int main( int argc, char** argv )
 {
-	Application app;
-	if ( app.Construct( 700, 700, 1, 1, false, true ) )
-		app.Start();
+	Aeon::Display display;
+
+	display.Init( 500, 500 );
+	display.SetTitle( "BRuh" );
+
+	std::thread thread( EngineThread, &display );
+
+	display.Start();
+
+	thread.detach();
 }

src/poly.cpp

@@ -22,6 +22,7 @@ int Polygon::AddSide( Segment segment )
 {
 	mIterator++;
 	mSides[mIterator] = segment;
+	return mIterator;
 }
 
 void Polygon::RemoveSide( int segment )