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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef MESSAGE_H
#define MESSAGE_H
#include <QtCore/qglobal.h>
#include <QtCore/qlist.h>
#include <QtCore/qbytearray.h>
QT_BEGIN_NAMESPACE
class QIODevice;
using MessageId = QByteArrayView;
struct Message
{
enum class Type { Invalid, Uniforms, Filenames };
using MessagePtr = std::shared_ptr<Message>;
virtual ~Message();
// NOTE! These functions assume the device is open and read/writeable when called!
virtual bool read(QDataStream &device) = 0;
virtual bool write(QDataStream &device) const = 0;
virtual Type type() const = 0;
static Message::MessagePtr getMessage(QIODevice &device);
static bool postMessage(QIODevice &device, const Message &message);
friend QDataStream &operator>>(QDataStream &stream, Message &message) { message.read(stream); return stream; }
friend QDataStream &operator<<(QDataStream &stream, const Message &message) { message.write(stream); return stream; }
};
struct UniformsMessage : Message
{
static constexpr MessageId id { "UM" };
using Uniform = std::pair<QByteArray /* type */, QByteArray /* name */>;
using UniformList = QList<Uniform>;
UniformList uniforms;
UniformsMessage() = default;
UniformsMessage(UniformList list) : uniforms(list) {}
~UniformsMessage() override;
bool read(QDataStream &stream) final;
bool write(QDataStream &stream) const final;
Type type() const final { return Type::Uniforms; }
};
struct FilenamesMessage : Message
{
static constexpr MessageId id { "FM" };
~FilenamesMessage() override;
bool read(QDataStream &stream) final;
bool write(QDataStream &stream) const final;
Type type() const final { return Type::Filenames; }
QByteArray vertFilename;
QByteArray fragFilename;
};
QT_END_NAMESPACE
#endif // MESSAGE_H
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