From a2366f78f0ddfc241811b48dfdb1289b81de0e1e Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Tue, 23 Apr 2024 16:08:54 +0100
Subject: [PATCH] renderer: send frame events to apps on empty damage renders

fixes #5711
---
 src/render/Renderer.cpp | 27 +++++++++++++++++++++++++--
 src/render/Renderer.hpp |  1 +
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 9bb75210..8b6be201 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -1322,9 +1322,12 @@ void CHyprRenderer::renderMonitor(CMonitor* pMonitor) {
                         damageBlinkCleanup = 0;
                 }
             }
-        } else {
+        } else
             g_pHyprRenderer->renderWindow(pMonitor->solitaryClient, pMonitor, &now, false, RENDER_PASS_MAIN /* solitary = no popups */);
-        }
+    } else {
+        sendFrameEventsToWorkspace(pMonitor, pMonitor->activeWorkspace, &now);
+        if (pMonitor->activeSpecialWorkspace)
+            sendFrameEventsToWorkspace(pMonitor, pMonitor->activeSpecialWorkspace, &now);
     }
 
     renderCursor = renderCursor && shouldRenderCursor();
@@ -1420,6 +1423,26 @@ void CHyprRenderer::renderWorkspace(CMonitor* pMonitor, PHLWORKSPACE pWorkspace,
     g_pHyprOpenGL->m_RenderData.pWorkspace = nullptr;
 }
 
+void CHyprRenderer::sendFrameEventsToWorkspace(CMonitor* pMonitor, PHLWORKSPACE pWorkspace, timespec* now) {
+    for (auto& w : g_pCompositor->m_vWindows) {
+        if (w->isHidden() && !w->m_bIsMapped && !w->m_bFadingOut)
+            continue;
+
+        if (!shouldRenderWindow(w.get(), pMonitor))
+            continue;
+
+        wlr_surface_for_each_surface(
+            w->m_pWLSurface.wlr(), [](wlr_surface* s, int x, int y, void* data) { wlr_surface_send_frame_done(s, (timespec*)data); }, now);
+    }
+
+    for (auto& lsl : pMonitor->m_aLayerSurfaceLayers) {
+        for (auto& ls : lsl) {
+            wlr_surface_for_each_surface(
+                ls->surface.wlr(), [](wlr_surface* s, int x, int y, void* data) { wlr_surface_send_frame_done(s, (timespec*)data); }, now);
+        }
+    }
+}
+
 void CHyprRenderer::setWindowScanoutMode(CWindow* pWindow) {
     if (!g_pCompositor->m_sWLRLinuxDMABuf || g_pSessionLockManager->isSessionLocked())
         return;
diff --git a/src/render/Renderer.hpp b/src/render/Renderer.hpp
index 2e2b8b92..0a0ae5c9 100644
--- a/src/render/Renderer.hpp
+++ b/src/render/Renderer.hpp
@@ -117,6 +117,7 @@ class CHyprRenderer {
     void           renderDragIcon(CMonitor*, timespec*);
     void           renderIMEPopup(CInputPopup*, CMonitor*, timespec*);
     void           renderWorkspace(CMonitor* pMonitor, PHLWORKSPACE pWorkspace, timespec* now, const CBox& geometry);
+    void           sendFrameEventsToWorkspace(CMonitor* pMonitor, PHLWORKSPACE pWorkspace, timespec* now); // sends frame displayed events but doesn't actually render anything
     void           renderAllClientsForWorkspace(CMonitor* pMonitor, PHLWORKSPACE pWorkspace, timespec* now, const Vector2D& translate = {0, 0}, const float& scale = 1.f);
 
     bool           m_bCursorHidden        = false;