1 files changed, 35 insertions, 0 deletions
diff --git a/shaders/texture-unit-cache.hpp b/shaders/texture-unit-cache.hpp
new file mode 100644
index 00000000..2647ea8c
--- /dev/null
+++ b/shaders/texture-unit-cache.hpp
@@ -0,0 +1,35 @@
+#pragma once
+#include "compat/defs.hpp"
+#include <Corrade/Containers/Array.h>
+
+namespace Magnum::GL { class AbstractTexture; }
+
+namespace floormat {
+
+struct texture_unit_cache final
+{
+    fm_DECLARE_DELETED_COPY_ASSIGNMENT(texture_unit_cache);
+    fm_DECLARE_DEFAULT_MOVE_ASSIGNMENT_(texture_unit_cache);
+
+    texture_unit_cache();
+
+    [[nodiscard]] int32_t bind(GL::AbstractTexture* ptr);
+    [[nodiscard]] int32_t bind(GL::AbstractTexture& x);
+    void invalidate();
+    void lock(size_t i, GL::AbstractTexture* = (GL::AbstractTexture*)-1);
+    void lock(size_t i, GL::AbstractTexture& tex) { lock(i, &tex); }
+    void unlock(size_t i, bool immediately = true);
+
+    size_t reuse_count() const { return cache_hit_count; }
+    size_t bind_count() const { return rebind_count; }
+    void reset_stats() { rebind_count = cache_hit_count = 0; }
+
+private:
+    static size_t get_unit_count();
+    struct unit_data;
+
+    size_t unit_count, lru_counter = 0, rebind_count = 0, cache_hit_count = 0;
+    Array<unit_data> units;
+};
+
+} // namespace floormat