memory reports

src/memoverlay.hh

@@ -0,0 +1,47 @@
+#pragma once
+
+// Runtime memory overlay - shows heap/RAM usage as a progress bar + text.
+// Compiled only when PSXSPLASH_MEMOVERLAY is defined (set from SplashEdit build flag).
+
+#ifdef PSXSPLASH_MEMOVERLAY
+
+#include <psyqo/font.hh>
+#include <psyqo/gpu.hh>
+#include <psyqo/bump-allocator.hh>
+#include <psyqo/ordering-table.hh>
+
+#include "renderer.hh"
+
+namespace psxsplash {
+
+class MemOverlay {
+public:
+    /// Call once at startup to cache linker symbol addresses.
+    void init(psyqo::Font<>* font);
+
+    /// Phase 1: Insert progress bar rectangles into the OT.
+    /// Call BEFORE gpu.chain(ot).
+    void renderOT(psyqo::OrderingTable<Renderer::ORDERING_TABLE_SIZE>& ot,
+                  psyqo::BumpAllocator<Renderer::BUMP_ALLOCATOR_SIZE>& balloc);
+
+    /// Phase 2: Emit text via chainprintf.
+    /// Call AFTER gpu.chain(ot).
+    void renderText(psyqo::GPU& gpu);
+
+private:
+    psyqo::Font<>* m_font = nullptr;
+
+    // Cached addresses from linker symbols
+    uintptr_t m_heapBase = 0;
+    uintptr_t m_stackTop = 0;
+    uint32_t  m_totalAvail = 0;
+
+    // Cached each frame for text phase
+    uint32_t m_lastUsedKB = 0;
+    uint32_t m_lastTotalKB = 0;
+    uint32_t m_lastPct = 0;
+};
+
+} // namespace psxsplash
+
+#endif // PSXSPLASH_MEMOVERLAY