fixes

include/opengl/shader_program_lookup.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "opengl/handles/shader_program_handle.hpp"
+#include <optional>
+#include <vector>
+
+namespace zgl {
+class shader_program_lookup
+{
+public:
+	void add(
+		const shader_program_handle& shader_program_handle,
+		std::span<const shader_program_variable> all_attributes,
+		std::span<const shader_program_variable> all_uniforms
+	);
+
+	[[nodiscard]] std::optional<shader_program_handle> find(
+		shader_program_handle::attribute_support_type attributes,
+		shader_program_handle::uniform_support_type uniforms,
+		std::span<const shader_program_variable> all_attributes
+	) const;
+
+	void print();
+
+private:
+	using attribute_locations_type = ztu::u32;
+
+	[[nodiscard]] static attribute_locations_type attribute_location_flags(
+		shader_program_handle::attribute_support_type attributes,
+		std::span<const shader_program_variable> all_attributes
+	);
+
+	struct attribute_entry_type
+	{
+		shader_program_handle::attribute_support_type attributes;
+		attribute_locations_type locations; // Do not go past location 31!!!
+	};
+
+	std::vector<shader_program_handle::uniform_support_type> m_mesh_shader_program_uniforms;
+	std::vector<attribute_entry_type> m_mesh_shader_program_attributes;
+	std::vector<shader_program_handle> m_mesh_shader_programs;
+};
+}