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// SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
* ProjT Launcher - Minecraft Launcher
* Copyright (C) 2026 Project Tick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include <QByteArray>
#include <QImage>
#include <QString>
/**
* @brief PNG reader using the bundled libpng and zlib
*
* This class provides PNG reading functionality using the project's own
* libpng and zlib implementations, avoiding conflicts with system libraries.
*
* Qt's QImage uses the system libpng which may be compiled with a different
* zlib version, causing "unsupported zlib version" errors. This class
* bypasses that by using our bundled libraries directly.
*/
class PngReader
{
public:
/**
* @brief Read a PNG image from a file
* @param filePath Path to the PNG file
* @return QImage containing the decoded image, or null QImage on failure
*/
static QImage readFromFile(const QString& filePath);
/**
* @brief Read a PNG image from memory
* @param data PNG data in memory
* @return QImage containing the decoded image, or null QImage on failure
*/
static QImage readFromData(const QByteArray& data);
/**
* @brief Check if a file is a valid PNG
* @param filePath Path to the file
* @return true if the file has a valid PNG signature
*/
static bool isPngFile(const QString& filePath);
/**
* @brief Check if data is valid PNG
* @param data Data to check
* @return true if the data has a valid PNG signature
*/
static bool isPngData(const QByteArray& data);
/**
* @brief Get the last error message
* @return Error message from the last failed operation
*/
static QString lastError();
/**
* @brief Set the last error message (for internal use by callbacks)
* @param error Error message
*/
static void setLastError(const QString& error);
private:
static QString s_lastError;
};
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