diff options
author | Eirik Aavitsland <eirik.aavitsland@qt.io> | 2018-07-03 12:30:46 +0200 |
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committer | Eirik Aavitsland <eirik.aavitsland@qt.io> | 2018-07-24 16:46:05 +0000 |
commit | 731538fdd469452e721b568fcbd808b437332008 (patch) | |
tree | 4867bd8983a9ba1406064287b4696f4d794b5501 /src/gui/util/qtexturefilereader.cpp | |
parent | 1ed0b2170de0ad6f3c40a6105d05e87e3c26ad35 (diff) |
Add API for reading and decoding graphical texture files
Add a framework for reading and decoding stored graphical texture file
formats. Includes decoders for the PKM and KTX formats.
This is basically the same texture file reading that was added to
qtdeclarative for 5.11, but has been refactored to be independent of
the scenegraph and opengl.
Task-number: QTBUG-67026
Change-Id: I87d8117550d8a2112f4f58c03e9ac6b3249cbc5a
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Diffstat (limited to 'src/gui/util/qtexturefilereader.cpp')
-rw-r--r-- | src/gui/util/qtexturefilereader.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/gui/util/qtexturefilereader.cpp b/src/gui/util/qtexturefilereader.cpp new file mode 100644 index 0000000000..5d4bd600e0 --- /dev/null +++ b/src/gui/util/qtexturefilereader.cpp @@ -0,0 +1,102 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qtexturefilereader_p.h" + +#include "qpkmhandler_p.h" +#include "qktxhandler_p.h" + +#include <QFileInfo> + +QT_BEGIN_NAMESPACE + +QTextureFileReader::QTextureFileReader(QIODevice *device, const QString &fileName) + : m_device(device), m_fileName(fileName) +{ +} + +QTextureFileReader::~QTextureFileReader() +{ + delete m_handler; +} + +QTextureFileData QTextureFileReader::read() +{ + if (!canRead()) + return QTextureFileData(); + return m_handler->read(); +} + +bool QTextureFileReader::canRead() +{ + if (!checked) { + checked = true; + if (!init()) + return false; + + QByteArray headerBlock = m_device->peek(64); + QFileInfo fi(m_fileName); + QByteArray suffix = fi.suffix().toLower().toLatin1(); + QByteArray logName = fi.fileName().toUtf8(); + + // Currently the handlers are hardcoded; later maybe a list of plugins + if (QPkmHandler::canRead(suffix, headerBlock)) { + m_handler = new QPkmHandler(m_device, logName); + } else if (QKtxHandler::canRead(suffix, headerBlock)) { + m_handler = new QKtxHandler(m_device, logName); + } + // else if OtherHandler::canRead() ...etc. + } + return (m_handler != nullptr); +} + +QList<QByteArray> QTextureFileReader::supportedFileFormats() +{ + // Hardcoded for now + return {QByteArrayLiteral("pkm"), QByteArrayLiteral("ktx")}; +} + +bool QTextureFileReader::init() +{ + if (!m_device) + return false; + return m_device->isReadable(); +} + +QT_END_NAMESPACE |