From 1911e4262baed82c3d7b7354ae52155a5839594d Mon Sep 17 00:00:00 2001
From: vaxerski <43317083+vaxerski@users.noreply.github.com>
Date: Sat, 22 Apr 2023 12:36:50 +0100
Subject: [PATCH] renderer: skip rendering bottom layers on fullscreen opaque

---
 src/Window.cpp          | 15 +++++++++++++++
 src/Window.hpp          |  1 +
 src/render/Renderer.cpp | 15 ++++++++++-----
 3 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/src/Window.cpp b/src/Window.cpp
index 87bf2d21..1392650b 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -668,3 +668,18 @@ void CWindow::updateGroupOutputs() {
 Vector2D CWindow::middle() {
     return m_vRealPosition.goalv() + m_vRealSize.goalv() / 2.f;
 }
+
+bool CWindow::opaque() {
+    if (m_bIsX11)
+        return !m_uSurface.xwayland->has_alpha;
+
+    if (m_uSurface.xdg->surface->opaque)
+        return true;
+
+    const auto EXTENTS = pixman_region32_extents(&m_uSurface.xdg->surface->opaque_region);
+    if (EXTENTS->x2 - EXTENTS->x1 >= m_uSurface.xdg->surface->current.buffer_width
+        && EXTENTS->y2 - EXTENTS->y1 >= m_uSurface.xdg->surface->current.buffer_height)
+        return true;
+
+    return false;
+}
diff --git a/src/Window.hpp b/src/Window.hpp
index ab71e8b8..5403a4f6 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -315,6 +315,7 @@ class CWindow {
     void                     updateDynamicRules();
     SWindowDecorationExtents getFullWindowReservedArea();
     Vector2D                 middle();
+    bool                     opaque();
 
     void                     onBorderAngleAnimEnd(void* ptr);
     bool                     isInCurvedCorner(double x, double y);
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 3ec3724a..c81690bc 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -440,11 +440,16 @@ void CHyprRenderer::renderAllClientsForWorkspace(CMonitor* pMonitor, CWorkspace*
     g_pHyprOpenGL->m_RenderData.renderModif = RENDERMODIFDATA;
 
     // Render layer surfaces below windows for monitor
-    for (auto& ls : pMonitor->m_aLayerSurfaceLayers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]) {
-        renderLayer(ls.get(), pMonitor, time);
-    }
-    for (auto& ls : pMonitor->m_aLayerSurfaceLayers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]) {
-        renderLayer(ls.get(), pMonitor, time);
+    // if we have a fullscreen, opaque window that convers the screen, we can skip this.
+    // TODO: check better with solitary after MR for tearing.
+    const auto PFULLWINDOW = g_pCompositor->getFullscreenWindowOnWorkspace(pWorkspace->m_iID);
+    if (g_pHyprOpenGL->m_RenderData.pCurrentMonData->blurFBDirty || !pWorkspace->m_bHasFullscreenWindow || pWorkspace->m_efFullscreenMode != FULLSCREEN_FULL || !PFULLWINDOW || PFULLWINDOW->m_vRealSize.isBeingAnimated() || !PFULLWINDOW->opaque()) {
+        for (auto& ls : pMonitor->m_aLayerSurfaceLayers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]) {
+            renderLayer(ls.get(), pMonitor, time);
+        }
+        for (auto& ls : pMonitor->m_aLayerSurfaceLayers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]) {
+            renderLayer(ls.get(), pMonitor, time);
+        }
     }
 
     // pre window pass