renderer: fix crash on null blur framebuffer during monitor disconnect

Guard all m_blurFB dereferences against null. The blur framebuffer is reset during monitor disconnect but layer surface snapshots use a simple render path that skips framebuffer allocation.

3 files changed, 9 insertions, 2 deletions

diff --git a/src/render/GLRenderer.cpp b/src/render/GLRenderer.cpp
index c1f64837..5adb9bb8 100644
--- a/src/render/GLRenderer.cpp
+++ b/src/render/GLRenderer.cpp
@@ -394,6 +394,8 @@ void CHyprGLRenderer::draw(CTextureMatteElement* element, const CRegion& damage)
 };
 
 SP<ITexture> CHyprGLRenderer::getBlurTexture(PHLMONITORREF pMonitor) {
+    if (!pMonitor->m_blurFB)
+        return nullptr;
     return pMonitor->m_blurFB->getTexture();
 }
 
diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index e9ca8baf..1c30e3ed 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -1029,7 +1029,8 @@ void CHyprOpenGLImpl::renderRectWithBlurInternal(const CBox& box, const CHyprCol
     CRegion damage{g_pHyprRenderer->m_renderData.damage};
     damage.intersect(box);
 
-    auto POUTFB = data.xray ? g_pHyprRenderer->m_renderData.pMonitor->m_blurFB->getTexture() : g_pHyprRenderer->blurMainFramebuffer(data.blurA, &damage);
+    auto POUTFB = data.xray ? (g_pHyprRenderer->m_renderData.pMonitor->m_blurFB ? g_pHyprRenderer->m_renderData.pMonitor->m_blurFB->getTexture() : nullptr) :
+                              g_pHyprRenderer->blurMainFramebuffer(data.blurA, &damage);
 
     g_pHyprRenderer->m_renderData.currentFB->bind();
 
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 9872b83e..bf3740da 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -1069,7 +1069,7 @@ void IHyprRenderer::drawTex(CTexPassElement* element, const CRegion& damage) {
             element->m_data.blurredBG = blurMainFramebuffer(element->m_data.a, &inverseOpaque);
             m_renderData.currentFB->bind();
         } else
-            element->m_data.blurredBG = m_renderData.pMonitor->m_blurFB->getTexture();
+            element->m_data.blurredBG = m_renderData.pMonitor->m_blurFB ? m_renderData.pMonitor->m_blurFB->getTexture() : nullptr;
 
         draw(element, damage);
     } else
@@ -1667,6 +1667,8 @@ SP<ITexture> IHyprRenderer::loadAsset(const std::string& filename) {
 }
 
 SP<ITexture> IHyprRenderer::getBlurTexture(PHLMONITORREF pMonitor) {
+    if (!pMonitor->m_blurFB)
+        return nullptr;
     return pMonitor->m_blurFB->getTexture();
 }
 
@@ -2155,6 +2157,8 @@ void IHyprRenderer::preBlurForCurrentMonitor(CRegion* fakeDamage) {
     const auto blurredTex = blurMainFramebuffer(1, fakeDamage);
 
     // render onto blurFB
+    if (!m_renderData.pMonitor->m_blurFB)
+        return;
     m_renderData.pMonitor->m_blurFB->alloc(m_renderData.pMonitor->m_pixelSize.x, m_renderData.pMonitor->m_pixelSize.y, m_renderData.pMonitor->m_output->state->state().drmFormat);
     m_renderData.pMonitor->m_blurFB->bind();