From 180c26ada6233c3c59c331cb14a64aac1eeb2941 Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Sun, 3 Nov 2024 15:16:08 +0000
Subject: [PATCH] renderer: safeguard against non-sampleable currentFB in
 blurMainFb

fixes #8325
---
 src/render/Framebuffer.cpp | 6 ++++++
 src/render/OpenGL.cpp      | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/src/render/Framebuffer.cpp b/src/render/Framebuffer.cpp
index 814a3339..bf75d414 100644
--- a/src/render/Framebuffer.cpp
+++ b/src/render/Framebuffer.cpp
@@ -97,12 +97,18 @@ void CFramebuffer::bind() {
 }
 
 void CFramebuffer::release() {
+    if (!m_iFbAllocated && !m_cTex)
+        return;
+
+    Debug::log(TRACE, "fb {} released", m_iFb);
+
     if (m_iFbAllocated)
         glDeleteFramebuffers(1, &m_iFb);
 
     m_cTex.reset();
     m_iFbAllocated = false;
     m_vSize        = Vector2D();
+    m_iFb          = 0;
 }
 
 CFramebuffer::~CFramebuffer() {
diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index 415bb920..45837509 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -1656,6 +1656,11 @@ void CHyprOpenGLImpl::renderTextureMatte(SP<CTexture> tex, CBox* pBox, CFramebuf
 // Dual (or more) kawase blur
 CFramebuffer* CHyprOpenGLImpl::blurMainFramebufferWithDamage(float a, CRegion* originalDamage) {
 
+    if (!m_RenderData.currentFB->getTexture()) {
+        Debug::log(ERR, "BUG THIS: null fb texture while attempting to blur main fb?! (introspection off?!)");
+        return &m_RenderData.pCurrentMonData->mirrorFB; // return something to sample from at least
+    }
+
     TRACY_GPU_ZONE("RenderBlurMainFramebufferWithDamage");
 
     const auto BLENDBEFORE = m_bBlend;