Renderer: Add ShaderStage class

src/Nazara/Renderer/RenderDevice.cpp

@@ -3,9 +3,32 @@
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
 #include <Nazara/Renderer/RenderDevice.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/File.hpp>
 #include <Nazara/Renderer/Debug.hpp>
 
 namespace Nz
 {
 	RenderDevice::~RenderDevice() = default;
+
+	std::shared_ptr<ShaderStageImpl> RenderDevice::InstantiateShaderStage(ShaderStageType type, ShaderLanguage lang, const std::filesystem::path& sourcePath)
+	{
+		File file(sourcePath);
+		if (!file.Open(OpenMode_ReadOnly | OpenMode_Text))
+		{
+			NazaraError("Failed to open \"" + sourcePath.generic_u8string() + '"');
+			return {};
+		}
+
+		std::size_t length = static_cast<std::size_t>(file.GetSize());
+
+		std::vector<Nz::UInt8> source(length);
+		if (file.Read(&source[0], length) != length)
+		{
+			NazaraError("Failed to read program file");
+			return {};
+		}
+
+		return InstantiateShaderStage(type, lang, source.data(), source.size());
+	}
 }