1 files changed, 137 insertions, 0 deletions
diff --git a/tests/manual/rhi/shared/dds_bc1.h b/tests/manual/rhi/shared/dds_bc1.h
new file mode 100644
index 0000000000..3c98a94cfc
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+++ b/tests/manual/rhi/shared/dds_bc1.h
@@ -0,0 +1,137 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+static const quint32 DDS_MAGIC = 0x20534444; // 'DDS '
+static const quint32 DDS_FOURCC = 4;
+
+#define FOURCC(c0, c1, c2, c3) ((c0) | ((c1) << 8) | ((c2) << 16) | ((c3 << 24)))
+
+struct DDS_PIXELFORMAT {
+    quint32 size;
+    quint32 flags;
+    quint32 fourCC;
+    quint32 rgbBitCount;
+    quint32 rBitMask;
+    quint32 gBitMask;
+    quint32 bBitMask;
+    quint32 aBitMask;
+};
+
+struct DDS_HEADER {
+    quint32 size;
+    quint32 flags;
+    quint32 height;
+    quint32 width;
+    quint32 pitch;
+    quint32 depth;
+    quint32 mipMapCount;
+    quint32 reserved1[11];
+    DDS_PIXELFORMAT pixelFormat;
+    quint32 caps;
+    quint32 caps2;
+    quint32 caps3;
+    quint32 caps4;
+    quint32 reserved2;
+};
+
+static quint32 bc1size(const QSize &size)
+{
+    static const quint32 blockSize = 8; // 8 bytes for BC1
+    const quint32 bytesPerLine = qMax<quint32>(1, (size.width() + 3) / 4) * blockSize;
+    const quint32 ySize = qMax<quint32>(1, (size.height() + 3) / 4);
+    return bytesPerLine * ySize;
+}
+
+static QByteArrayList loadBC1(const QString &filename, QSize *size)
+{
+    QFile f(filename);
+    if (!f.open(QIODevice::ReadOnly)) {
+        qWarning("Failed to open %s", qPrintable(filename));
+        return QByteArrayList();
+    }
+
+    quint32 magic = 0;
+    f.read(reinterpret_cast<char *>(&magic), sizeof(magic));
+    if (magic != DDS_MAGIC) {
+        qWarning("%s is not a DDS file", qPrintable(filename));
+        return QByteArrayList();
+    }
+    DDS_HEADER header;
+    f.read(reinterpret_cast<char *>(&header), sizeof(header));
+    if (header.size != sizeof(DDS_HEADER)) {
+        qWarning("Invalid DDS header size");
+        return QByteArrayList();
+    }
+    if (header.pixelFormat.size != sizeof(DDS_PIXELFORMAT)) {
+        qWarning("Invalid DDS pixel format size");
+        return QByteArrayList();
+    }
+    if (!(header.pixelFormat.flags & DDS_FOURCC)) {
+        qWarning("Invalid DDS pixel format");
+        return QByteArrayList();
+    }
+    if (header.pixelFormat.fourCC != FOURCC('D', 'X', 'T', '1')) {
+        qWarning("Only DXT1 (BC1) is supported");
+        return QByteArrayList();
+    }
+
+    QByteArrayList data;
+    QSize sz(header.width, header.height);
+    for (quint32 level = 0; level < header.mipMapCount; ++level) {
+        data.append(f.read(bc1size(sz)));
+        sz.setWidth(qMax(1, sz.width() / 2));
+        sz.setHeight(qMax(1, sz.height() / 2));
+    }
+
+    if (size)
+        *size = QSize(header.width, header.height);
+
+    return data;
+}