From 1830296df3515222bf0f03b90822e3b23e74b775 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Sun, 22 Dec 2024 17:20:33 +0000
Subject: [PATCH] debug: add debug:pass for debugging the render pass

---
 src/config/ConfigManager.cpp |  1 +
 src/render/pass/Pass.cpp     | 30 ++++++++++++++++++++++++++++--
 src/render/pass/Pass.hpp     |  2 ++
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 9b6e29e40..f9ad54aa2 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -413,6 +413,7 @@ CConfigManager::CConfigManager() {
     m_pConfig->addConfigValue("debug:log_damage", Hyprlang::INT{0});
     m_pConfig->addConfigValue("debug:overlay", Hyprlang::INT{0});
     m_pConfig->addConfigValue("debug:damage_blink", Hyprlang::INT{0});
+    m_pConfig->addConfigValue("debug:pass", Hyprlang::INT{0});
     m_pConfig->addConfigValue("debug:disable_logs", Hyprlang::INT{1});
     m_pConfig->addConfigValue("debug:disable_time", Hyprlang::INT{1});
     m_pConfig->addConfigValue("debug:enable_stdout_logs", Hyprlang::INT{0});
diff --git a/src/render/pass/Pass.cpp b/src/render/pass/Pass.cpp
index 31385acb7..b6256c44d 100644
--- a/src/render/pass/Pass.cpp
+++ b/src/render/pass/Pass.cpp
@@ -21,6 +21,8 @@ void CRenderPass::add(SP<IPassElement> el) {
 }
 
 void CRenderPass::simplify() {
+    static auto PDEBUGPASS = CConfigValue<Hyprlang::INT>("debug:pass");
+
     // TODO: use precompute blur for instances where there is nothing in between
 
     // if there is live blur, we need to NOT occlude any area where it will be influenced
@@ -78,6 +80,20 @@ void CRenderPass::simplify() {
                 }
             }
             newDamage.subtract(opaque);
+            if (*PDEBUGPASS)
+                occludedRegion.add(opaque);
+        }
+    }
+
+    if (*PDEBUGPASS) {
+        for (auto& el2 : m_vPassElements) {
+            if (!el2->element->needsLiveBlur())
+                continue;
+
+            const auto BB = el2->element->boundingBox();
+            RASSERT(BB, "No bounding box for an element with live blur is illegal");
+
+            totalLiveBlurRegion.add(*BB);
         }
     }
 }
@@ -87,9 +103,13 @@ void CRenderPass::clear() {
 }
 
 CRegion CRenderPass::render(const CRegion& damage_) {
-    const auto WILLBLUR = std::ranges::any_of(m_vPassElements, [](const auto& el) { return el->element->needsLiveBlur(); });
+    static auto PDEBUGPASS = CConfigValue<Hyprlang::INT>("debug:pass");
 
-    damage = damage_.copy();
+    const auto  WILLBLUR = std::ranges::any_of(m_vPassElements, [](const auto& el) { return el->element->needsLiveBlur(); });
+
+    damage              = *PDEBUGPASS ? CRegion{CBox{{}, {INT32_MAX, INT32_MAX}}} : damage_.copy();
+    occludedRegion      = CRegion{};
+    totalLiveBlurRegion = CRegion{};
 
     if (damage.empty()) {
         g_pHyprOpenGL->m_RenderData.damage      = damage;
@@ -145,6 +165,12 @@ CRegion CRenderPass::render(const CRegion& damage_) {
         el->element->draw(el->elementDamage);
     }
 
+    if (*PDEBUGPASS) {
+        CBox monbox = {{}, g_pHyprOpenGL->m_RenderData.pMonitor->vecTransformedSize};
+        g_pHyprOpenGL->renderRectWithDamage(&monbox, CHyprColor{1.F, 0.1F, 0.1F, 0.5F}, occludedRegion);
+        g_pHyprOpenGL->renderRectWithDamage(&monbox, CHyprColor{0.1F, 1.F, 0.1F, 0.5F}, totalLiveBlurRegion);
+    }
+
     g_pHyprOpenGL->m_RenderData.damage = damage;
     return damage;
 }
diff --git a/src/render/pass/Pass.hpp b/src/render/pass/Pass.hpp
index 7f332c19c..6fe6938f5 100644
--- a/src/render/pass/Pass.hpp
+++ b/src/render/pass/Pass.hpp
@@ -18,6 +18,8 @@ class CRenderPass {
 
   private:
     CRegion damage;
+    CRegion occludedRegion;
+    CRegion totalLiveBlurRegion;
 
     struct SPassElementData {
         CRegion          elementDamage;