From e947af789491ace48fc59a4fffe19be4be234b1b Mon Sep 17 00:00:00 2001
From: vaxerski <vaxry@vaxry.net>
Date: Thu, 15 Aug 2024 22:34:45 +0200
Subject: [PATCH] drm/atomic: clip damage to pixel size

ref https://github.com/hyprwm/Hyprland/issues/7356
---
 src/backend/drm/impl/Atomic.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/backend/drm/impl/Atomic.cpp b/src/backend/drm/impl/Atomic.cpp
index 84efceb..7ca36e9 100644
--- a/src/backend/drm/impl/Atomic.cpp
+++ b/src/backend/drm/impl/Atomic.cpp
@@ -221,6 +221,7 @@ Aquamarine::CDRMAtomicImpl::CDRMAtomicImpl(Hyprutils::Memory::CSharedPointer<CDR
 bool Aquamarine::CDRMAtomicImpl::prepareConnector(Hyprutils::Memory::CSharedPointer<SDRMConnector> connector, SDRMConnectorCommitData& data) {
     const auto& STATE  = connector->output->state->state();
     const bool  enable = STATE.enabled;
+    const auto& MODE   = STATE.mode ? STATE.mode : STATE.customMode;
 
     if (data.modeset) {
         if (!enable)
@@ -262,11 +263,12 @@ bool Aquamarine::CDRMAtomicImpl::prepareConnector(Hyprutils::Memory::CSharedPoin
         }
     }
 
-    if (STATE.committed & COutputState::AQ_OUTPUT_STATE_DAMAGE && connector->crtc->primary->props.fb_damage_clips) {
+    if ((STATE.committed & COutputState::AQ_OUTPUT_STATE_DAMAGE) && connector->crtc->primary->props.fb_damage_clips && MODE) {
         if (STATE.damage.empty())
             data.atomic.fbDamage = 0;
         else {
-            std::vector<pixman_box32_t> rects = STATE.damage.getRects();
+            TRACE(connector->backend->backend->log(AQ_LOG_TRACE, std::format("atomic drm: clipping damage to pixel size {}", MODE->pixelSize)));
+            std::vector<pixman_box32_t> rects = STATE.damage.copy().intersect(CBox{{}, MODE->pixelSize}).getRects();
             if (drmModeCreatePropertyBlob(connector->backend->gpu->fd, rects.data(), sizeof(pixman_box32_t) * rects.size(), &data.atomic.fbDamage)) {
                 connector->backend->backend->log(AQ_LOG_ERROR, "atomic drm: failed to create a damage blob");
                 return false;