renderer: use a render pass for render modif in client render

fixes #8918

src/render/pass/RendererHintsPassElement.cpp

@@ -0,0 +1,19 @@
+#include "RendererHintsPassElement.hpp"
+#include "../OpenGL.hpp"
+
+CRendererHintsPassElement::CRendererHintsPassElement(const CRendererHintsPassElement::SData& data_) : data(data_) {
+    ;
+}
+
+void CRendererHintsPassElement::draw(const CRegion& damage) {
+    if (data.renderModif.has_value())
+        g_pHyprOpenGL->m_RenderData.renderModif = *data.renderModif;
+}
+
+bool CRendererHintsPassElement::needsLiveBlur() {
+    return false;
+}
+
+bool CRendererHintsPassElement::needsPrecomputeBlur() {
+    return false;
+}

src/render/pass/RendererHintsPassElement.hpp

@@ -0,0 +1,25 @@
+#pragma once
+#include "PassElement.hpp"
+#include <optional>
+#include "../OpenGL.hpp"
+
+class CRendererHintsPassElement : public IPassElement {
+  public:
+    struct SData {
+        std::optional<SRenderModifData> renderModif;
+    };
+
+    CRendererHintsPassElement(const SData& data);
+    virtual ~CRendererHintsPassElement() = default;
+
+    virtual void        draw(const CRegion& damage);
+    virtual bool        needsLiveBlur();
+    virtual bool        needsPrecomputeBlur();
+
+    virtual const char* passName() {
+        return "CRendererHintsPassElement";
+    }
+
+  private:
+    SData data;
+};