initial commit

include/opengl/error.hpp

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <system_error>
+#include "GL/glew.h"
+
+namespace zgl
+{
+namespace error
+{
+
+enum class codes : GLenum {
+	ok = GL_NO_ERROR,
+	invalid_enum = GL_INVALID_ENUM,
+	invalid_value = GL_INVALID_VALUE,
+	invalid_operation = GL_INVALID_OPERATION,
+	invalid_framebuffer_operation = GL_INVALID_FRAMEBUFFER_OPERATION,
+	out_of_memory = GL_OUT_OF_MEMORY,
+	stack_overflow = GL_STACK_OVERFLOW,
+	stack_underflow = GL_STACK_UNDERFLOW,
+	context_lost = GL_CONTEXT_LOST
+};
+
+struct category : std::error_category
+{
+	[[nodiscard]] const char* name() const noexcept override
+	{
+		return "opengl";
+	}
+
+	[[nodiscard]] std::string message(int ev) const override
+	{
+		switch (static_cast<codes>(ev)) {
+			using enum codes;
+		case ok:
+			return "No error has been recorded.";
+		case invalid_enum:
+			return "An unacceptable value is specified for an enumerated argument.";
+		case invalid_value:
+			return "A numeric argument is out of range.";
+		case invalid_operation:
+			return "The specified operation is not allowed in the current state.";
+		case invalid_framebuffer_operation:
+			return "The framebuffer object is not complete.";
+		case out_of_memory:
+			return "There is not enough memory left to execute the command.";
+		case stack_overflow:
+			return "An attempt has been made to perform an operation that would cause an internal stack to underflow.";
+		case stack_underflow:
+			return "An attempt has been made to perform an operation that would cause an internal stack to overflow.";
+		case context_lost:
+			return "The OpenGL context has been lost.";
+		default:
+			return "<unknown>";
+		}
+	}
+};
+
+} // namespace error
+
+[[nodiscard]] inline std::error_category& error_category() noexcept
+{
+	static error::category category;
+	return category;
+}
+
+[[nodiscard]] inline std::error_code make_error_code(const GLenum e) noexcept
+{
+	return { static_cast<int>(e), error_category() };
+}
+
+} // namespace zgl
+
+template<>
+struct std::is_error_code_enum<zgl::error::codes> : std::true_type {};