Renderer: rewrite render scheduling (#8683)

This rewrites renderer scheduling. Occlusion is now unified in a new Pass type.

src/render/pass/Pass.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "../../defines.hpp"
+#include "PassElement.hpp"
+
+class CGradientValueData;
+
+class CRenderPass {
+  public:
+    bool    empty() const;
+    bool    single() const;
+    bool    needsIntrospection() const;
+
+    void    add(SP<IPassElement> elem);
+    void    clear();
+
+    CRegion render(const CRegion& damage_);
+
+  private:
+    CRegion damage;
+
+    struct SPassElementData {
+        CRegion          elementDamage;
+        SP<IPassElement> element;
+        bool             discard = false;
+    };
+
+    std::vector<SP<SPassElementData>> m_vPassElements;
+
+    SP<IPassElement>                  currentPassInfo = nullptr;
+
+    void                              simplify();
+    float                             oneBlurRadius();
+
+    friend class CHyprOpenGLImpl;
+};