OpenGLRenderer: Add shader source on compilation error

include/Nazara/OpenGLRenderer/Wrapper/Shader.hpp

@@ -26,7 +26,8 @@ namespace Nz::GL
 
 			inline void Compile();
 
-			inline bool GetCompilationStatus(std::string* error = nullptr);
+			inline bool GetCompilationStatus(std::string* error = nullptr) const;
+			inline std::string GetSource() const;
 
 			inline void SetBinarySource(GLenum binaryFormat, const void* binary, GLsizei length);
 			inline void SetSource(const char* source, GLint length);

include/Nazara/OpenGLRenderer/Wrapper/Shader.inl

@@ -16,7 +16,7 @@ namespace Nz::GL
 		context.glCompileShader(m_objectId);
 	}
 
-	inline bool Shader::GetCompilationStatus(std::string* error)
+	inline bool Shader::GetCompilationStatus(std::string* error) const
 	{
 		assert(m_objectId);
 		const Context& context = EnsureDeviceContext();
@@ -45,6 +45,28 @@ namespace Nz::GL
 		return true;
 	}
 
+	inline std::string Shader::GetSource() const
+	{
+		assert(m_objectId);
+		const Context& context = EnsureDeviceContext();
+
+		GLint sourceLength;
+		context.glGetShaderiv(m_objectId, GL_SHADER_SOURCE_LENGTH, &sourceLength);
+
+		if (sourceLength <= 1)
+			return {};
+
+		std::string source;
+		source.resize(sourceLength - 1);
+
+		GLsizei length;
+		context.glGetShaderSource(m_objectId, sourceLength, &length, &source[0]);
+
+		assert(length == sourceLength - 1);
+
+		return source;
+	}
+
 	inline void Shader::SetBinarySource(GLenum binaryFormat, const void* binary, GLsizei length)
 	{
 		assert(m_objectId);

src/Nazara/OpenGLRenderer/OpenGLShaderModule.cpp

@@ -159,6 +159,10 @@ namespace Nz
 	{
 		std::string errorLog;
 		if (!shader.GetCompilationStatus(&errorLog))
-			throw std::runtime_error("Failed to compile shader: " + errorLog);
+		{
+			std::string source = shader.GetSource();
+
+			throw std::runtime_error("Failed to compile shader: " + errorLog + "\nSource: " + source);
+		}
 	}
 }