From 1c1c666f578568425f68671080c822342098e2ee Mon Sep 17 00:00:00 2001
From: Donovan Glover <donovan@dglover.co>
Date: Thu, 31 Aug 2023 00:44:40 -0400
Subject: [PATCH] overlays: Patch hyprland window sizes

Fixes an issue where 1 pixel gaps would exist where window sizes would
otherwise divide evenly.
---
 overlays/default.nix                |  1 +
 overlays/hyprland.nix               | 10 ++++++++++
 patches/hyprland-window-sizes.patch | 24 ++++++++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 overlays/hyprland.nix
 create mode 100644 patches/hyprland-window-sizes.patch

diff --git a/overlays/default.nix b/overlays/default.nix
index 855e6c6..59af105 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -1,5 +1,6 @@
 {
   imports = [
     ./alejandra.nix
+    ./hyprland.nix
   ];
 }
diff --git a/overlays/hyprland.nix b/overlays/hyprland.nix
new file mode 100644
index 0000000..e25bdfc
--- /dev/null
+++ b/overlays/hyprland.nix
@@ -0,0 +1,10 @@
+{
+  nixpkgs.overlays = [
+    (final: prev: {
+      hyprland = prev.hyprland.overrideAttrs (old: {
+        patches = (old.patches or [ ]) ++ [ ../patches/hyprland-window-sizes.patch ];
+      });
+    })
+  ];
+}
+
diff --git a/patches/hyprland-window-sizes.patch b/patches/hyprland-window-sizes.patch
new file mode 100644
index 0000000..0267161
--- /dev/null
+++ b/patches/hyprland-window-sizes.patch
@@ -0,0 +1,24 @@
+diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
+index 1d22935f..b6093676 100644
+--- a/src/render/Renderer.cpp
++++ b/src/render/Renderer.cpp
+@@ -266,7 +266,7 @@ void CHyprRenderer::renderWindow(CWindow* pWindow, CMonitor* pMonitor, timespec*
+     static auto* const PDIMAROUND  = &g_pConfigManager->getConfigValuePtr("decoration:dim_around")->floatValue;
+     static auto* const PBORDERSIZE = &g_pConfigManager->getConfigValuePtr("general:border_size")->intValue;
+ 
+-    SRenderData        renderdata = {pMonitor, time, REALPOS.x, REALPOS.y};
++    SRenderData        renderdata = {pMonitor, time, std::round(REALPOS.x), std::round(REALPOS.y)};
+     if (ignorePosition) {
+         renderdata.x = pMonitor->vecPosition.x;
+         renderdata.y = pMonitor->vecPosition.y;
+@@ -276,8 +276,8 @@ void CHyprRenderer::renderWindow(CWindow* pWindow, CMonitor* pMonitor, timespec*
+         decorate = false;
+ 
+     renderdata.surface   = pWindow->m_pWLSurface.wlr();
+-    renderdata.w         = std::max(pWindow->m_vRealSize.vec().x, 5.0); // clamp the size to min 5,
+-    renderdata.h         = std::max(pWindow->m_vRealSize.vec().y, 5.0); // otherwise we'll have issues later with invalid boxes
++    renderdata.w         = std::round(std::max(pWindow->m_vRealSize.vec().x, 5.0)); // clamp the size to min 5,
++    renderdata.h         = std::round(std::max(pWindow->m_vRealSize.vec().y, 5.0)); // otherwise we'll have issues later with invalid boxes
+     renderdata.dontRound = (pWindow->m_bIsFullscreen && PWORKSPACE->m_efFullscreenMode == FULLSCREEN_FULL) || (!pWindow->m_sSpecialRenderData.rounding);
+     renderdata.fadeAlpha = pWindow->m_fAlpha.fl() * (pWindow->m_bPinned ? 1.f : PWORKSPACE->m_fAlpha.fl());
+     renderdata.alpha     = pWindow->m_fActiveInactiveAlpha.fl();