From d767a810e84866872f146e1f9f699bd4043f6981 Mon Sep 17 00:00:00 2001
From: str1k3r <115313679+S1l3ntStr1ke87@users.noreply.github.com>
Date: Sun, 23 Aug 2026 17:14:36 -0400
Subject: [PATCH] feat:: vsync stuff

---
 4J_Render/Windows64/4J_Render.cpp    | 17 +++++++++++++++--
 4J_Render/Windows64/Renderer.h       |  2 +-
 4J_Render/Windows64/RendererCore.cpp | 21 +++++++++------------
 Headers/Windows64/4J_Render.h        |  7 ++++++-
 4 files changed, 31 insertions(+), 16 deletions(-)

diff --git a/4J_Render/Windows64/4J_Render.cpp b/4J_Render/Windows64/4J_Render.cpp
index 8eaab0b..6d6086a 100644
--- a/4J_Render/Windows64/4J_Render.cpp
+++ b/4J_Render/Windows64/4J_Render.cpp
@@ -28,6 +28,9 @@ SOFTWARE.
 
 C4JRender RenderManager;
 
+//str1k3r - set VSync to true by default
+bool C4JRender::m_VSyncState = true;
+
 void C4JRender::Tick()
 {
 	InternalRenderManager.CBuffTick();
@@ -38,6 +41,16 @@ void C4JRender::UpdateGamma(unsigned short usGamma)
 	InternalRenderManager.UpdateGamma(usGamma);
 }
 
+void C4JRender::SetVSync(bool vs)
+{
+	m_VSyncState = vs;
+}
+
+int C4JRender::GetVSync()
+{
+	return m_VSyncState ? 1 : 0;
+}
+
 void C4JRender::MatrixMode(int type)
 {
 	InternalRenderManager.MatrixMode(type);
@@ -118,9 +131,9 @@ void C4JRender::DoScreenGrabOnNextPresent()
 	InternalRenderManager.DoScreenGrabOnNextPresent();
 }
 
-void C4JRender::Present()
+void C4JRender::Present(int ScreenWidth, int ScreenHeight)
 {
-	InternalRenderManager.Present();
+	InternalRenderManager.Present(ScreenWidth, ScreenHeight);
 }
 
 void C4JRender::Clear(int flags, D3D11_RECT* pRect)
diff --git a/4J_Render/Windows64/Renderer.h b/4J_Render/Windows64/Renderer.h
index 66378bd..0a79bbb 100644
--- a/4J_Render/Windows64/Renderer.h
+++ b/4J_Render/Windows64/Renderer.h
@@ -72,7 +72,7 @@ public:
     ID3D11DeviceContext *InitialiseContext(bool fromPresent);
     void StartFrame();
     void DoScreenGrabOnNextPresent();
-    void Present();
+    void Present(int ScreenWidth, int ScreenHeight);
     void Clear(int flags, D3D11_RECT *pRect);
     void SetClearColour(const float colourRGBA[4]);
     bool IsWidescreen();
diff --git a/4J_Render/Windows64/RendererCore.cpp b/4J_Render/Windows64/RendererCore.cpp
index 0cbf944..003393e 100644
--- a/4J_Render/Windows64/RendererCore.cpp
+++ b/4J_Render/Windows64/RendererCore.cpp
@@ -55,8 +55,6 @@ D3D11_PRIMITIVE_TOPOLOGY Renderer::g_topologies[C4JRender::PRIMITIVE_TYPE_COUNT]
 };
 
 static const unsigned int kVertexBufferSize = 0x100000;
-static const unsigned int kScreenGrabWidth = 1920;
-static const unsigned int kScreenGrabHeight = 1080;
 static const unsigned int kThumbnailSize = 64;
 
 static const unsigned int g_vertexStrides[C4JRender::VERTEX_TYPE_COUNT] = { 32, 16, 32, 32 };
@@ -864,7 +862,7 @@ bool Renderer::IsWidescreen()
     return true;
 }
 
-void Renderer::Present()
+void Renderer::Present(int ScreenWidth, int ScreenHeight)
 {
     PROFILER_SCOPE("Renderer::Present", "Present", MP_MAGENTA);
 
@@ -872,7 +870,7 @@ void Renderer::Present()
     {
         PROFILER_SCOPE("Renderer::Present", "ScreenGrab", MP_MAGENTA);
 
-        unsigned char *linearData = new unsigned char[kScreenGrabWidth * kScreenGrabHeight * 4];
+        unsigned char *linearData = new unsigned char[ScreenWidth * ScreenHeight * 4];
 
         ID3D11Resource *backBufferResource = NULL;
         ID3D11Texture2D *backBuffer = NULL;
@@ -898,13 +896,13 @@ void Renderer::Present()
             m_pDeviceContext->Map(stagingTexture, 0, D3D11_MAP_READ_WRITE, 0, &mapped);
             const unsigned char* src = reinterpret_cast<const unsigned char*>(mapped.pData);
 
-            for (UINT y = 0; y < kScreenGrabHeight; ++y)
+            for (UINT y = 0; y < ScreenHeight; ++y)
             {
-                unsigned char *dstRow = linearData + y * kScreenGrabWidth * 4;
+                unsigned char *dstRow = linearData + y * ScreenWidth * 4;
                 const unsigned char *srcRow = src + y * mapped.RowPitch;
-                std::memcpy(dstRow, srcRow, kScreenGrabWidth * 4);
+                std::memcpy(dstRow, srcRow, ScreenWidth * 4);
 
-                for (UINT x = 0; x < kScreenGrabWidth; ++x)
+                for (UINT x = 0; x < ScreenWidth; ++x)
                     dstRow[x * 4 + 3] = 0xFF;
             }
 
@@ -926,8 +924,8 @@ void Renderer::Present()
                 UTCSysTime.wSecond);
 
         D3DXIMAGE_INFO info;
-        info.Width = kScreenGrabWidth;
-        info.Height = kScreenGrabHeight;
+        info.Width = ScreenWidth;
+        info.Height = ScreenHeight;
         SaveTextureData(fileName, &info, reinterpret_cast<int*>(linearData));
 
         delete[] linearData;
@@ -935,7 +933,7 @@ void Renderer::Present()
         m_bShouldScreenGrabNextFrame = false;
     }
 
-    m_pSwapChain->Present(1, 0);
+    m_pSwapChain->Present(C4JRender::GetVSync(), 0);
     ++presentCount;
 }
 
@@ -1046,4 +1044,3 @@ Renderer::Context &Renderer::getContext()
 {
     return *reinterpret_cast<Renderer::Context*>(TlsGetValue(Renderer::tlsIdx));
 }
-
diff --git a/Headers/Windows64/4J_Render.h b/Headers/Windows64/4J_Render.h
index c8fe48b..c5aac4f 100644
--- a/Headers/Windows64/4J_Render.h
+++ b/Headers/Windows64/4J_Render.h
@@ -57,6 +57,11 @@ public:
     void Tick();
     void UpdateGamma(unsigned short usGamma);
 
+	// VSync
+	static bool m_VSyncState;
+	static void SetVSync(bool vs);
+	static int  GetVSync();
+
     // Matrix stack
     void MatrixMode(int type);
     void MatrixSetIdentity();
@@ -76,7 +81,7 @@ public:
     void InitialiseContext();
     void StartFrame();
     void DoScreenGrabOnNextPresent();
-    void Present();
+    void Present(int ScreenWidth, int ScreenHeight);
     void Clear(int flags, D3D11_RECT *pRect = NULL);
     void SetClearColour(const float colourRGBA[4]);
     bool IsWidescreen();