Renderer: rewrite render scheduling (#8683)

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

src/render/pass/TextureMatteElement.hpp

@@ -0,0 +1,29 @@
+#pragma once
+#include "PassElement.hpp"
+#include "../Framebuffer.hpp"
+
+class CTexture;
+
+class CTextureMatteElement : public IPassElement {
+  public:
+    struct STextureMatteData {
+        CBox             box;
+        SP<CTexture>     tex;
+        SP<CFramebuffer> fb;
+        bool             disableTransformAndModify = false;
+    };
+
+    CTextureMatteElement(const STextureMatteData& data_);
+    virtual ~CTextureMatteElement() = default;
+
+    virtual void        draw(const CRegion& damage);
+    virtual bool        needsLiveBlur();
+    virtual bool        needsPrecomputeBlur();
+
+    virtual const char* passName() {
+        return "CTextureMatteElement";
+    }
+
+  private:
+    STextureMatteData data;
+};