OpenGL: Implement VAOs

include/Nazara/OpenGLRenderer/OpenGLVaoCache.inl

@@ -0,0 +1,81 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - OpenGL Renderer"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/OpenGLRenderer/OpenGLVaoCache.hpp>
+#include <Nazara/Core/Algorithm.hpp>
+#include <Nazara/OpenGLRenderer/Debug.hpp>
+
+namespace Nz::GL
+{
+	inline bool operator==(const OpenGLVaoSetup& lhs, const OpenGLVaoSetup& rhs)
+	{
+		if (lhs.indexBuffer != rhs.indexBuffer)
+			return false;
+
+		const auto& compareAttribs = [](const auto& lAttribOpt, const auto& rAttribOpt)
+		{
+			if (lAttribOpt.has_value() != rAttribOpt.has_value())
+				return false;
+
+			if (lAttribOpt)
+			{
+				const auto& lAttrib = *lAttribOpt;
+				const auto& rAttrib = *rAttribOpt;
+
+				if (lAttrib.vertexBuffer != rAttrib.vertexBuffer)
+					return false;
+
+				if (lAttrib.size != rAttrib.size)
+					return false;
+
+				if (lAttrib.type != rAttrib.type)
+					return false;
+
+				if (lAttrib.normalized != rAttrib.normalized)
+					return false;
+
+				if (lAttrib.stride != rAttrib.stride)
+					return false;
+
+				if (lAttrib.pointer != rAttrib.pointer)
+					return false;
+			}
+
+
+			return true;
+		};
+
+		return std::equal(lhs.vertexAttribs.begin(), lhs.vertexAttribs.end(), rhs.vertexAttribs.begin(), compareAttribs);
+	}
+
+	inline std::size_t OpenGLVaoSetupHasher::operator()(const OpenGLVaoSetup& setup) const
+	{
+		std::size_t seed = 0;
+
+		HashCombine(seed, setup.indexBuffer);
+
+		std::size_t bindingIndex = 0;
+		for (const auto& attribOpt : setup.vertexAttribs)
+		{
+			if (attribOpt)
+			{
+				const auto& attrib = attribOpt.value();
+
+				HashCombine(seed, bindingIndex);
+				HashCombine(seed, attrib.vertexBuffer);
+				HashCombine(seed, attrib.size);
+				HashCombine(seed, attrib.type);
+				HashCombine(seed, attrib.normalized);
+				HashCombine(seed, attrib.stride);
+				HashCombine(seed, attrib.pointer);
+			}
+
+			bindingIndex++;
+		}
+
+		return seed;
+	}
+}
+
+#include <Nazara/OpenGLRenderer/DebugOff.hpp>