1 files changed, 62 insertions, 39 deletions

diff --git a/src/gui/opengl/qopenglprogrambinarycache.cpp b/src/gui/opengl/qopenglprogrambinarycache.cpp
index 64217d470d..dd1462018f 100644
--- a/src/gui/opengl/qopenglprogrambinarycache.cpp
+++ b/src/gui/opengl/qopenglprogrambinarycache.cpp
@@ -1,12 +1,11 @@
 /****************************************************************************
 **
-** Copyright (C) 2021 The Qt Company Ltd.
+** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:COMM$
-**
+** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -15,25 +14,26 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** $QT_END_LICENSE$
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
-**
+** 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.
 **
+** $QT_END_LICENSE$
 **
 ****************************************************************************/
 
@@ -120,20 +120,24 @@ QOpenGLProgramBinaryCache::QOpenGLProgramBinaryCache()
 {
     const QString subPath = QLatin1String("/qtshadercache-") + QSysInfo::buildAbi() + QLatin1Char('/');
     const QString sharedCachePath = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation);
+    m_globalCacheDir = sharedCachePath + subPath;
+    m_localCacheDir = QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + subPath;
+
     if (!sharedCachePath.isEmpty()) {
-        m_cacheDir = sharedCachePath + subPath;
-        m_cacheWritable = qt_ensureWritableDir(m_cacheDir);
+        m_currentCacheDir = m_globalCacheDir;
+        m_cacheWritable = qt_ensureWritableDir(m_currentCacheDir);
     }
     if (!m_cacheWritable) {
-        m_cacheDir = QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + subPath;
-        m_cacheWritable = qt_ensureWritableDir(m_cacheDir);
+        m_currentCacheDir = m_localCacheDir;
+        m_cacheWritable = qt_ensureWritableDir(m_currentCacheDir);
     }
-    qCDebug(lcOpenGLProgramDiskCache, "Cache location '%s' writable = %d", qPrintable(m_cacheDir), m_cacheWritable);
+
+    qCDebug(lcOpenGLProgramDiskCache, "Cache location '%s' writable = %d", qPrintable(m_currentCacheDir), m_cacheWritable);
 }
 
 QString QOpenGLProgramBinaryCache::cacheFileName(const QByteArray &cacheKey) const
 {
-    return m_cacheDir + QString::fromUtf8(cacheKey);
+    return m_currentCacheDir + QString::fromUtf8(cacheKey);
 }
 
 #define BASE_HEADER_SIZE (int(4 * sizeof(quint32)))
@@ -362,6 +366,25 @@ static inline void writeStr(uchar **p, const QByteArray &str)
     *p += str.size();
 }
 
+static inline bool writeFile(const QString &filename, const QByteArray &data)
+{
+#if QT_CONFIG(temporaryfile)
+    QSaveFile f(filename);
+    if (f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+        f.write(data);
+        if (f.commit())
+            return true;
+    }
+#else
+    QFile f(filename);
+    if (f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+        if (f.write(data) == data.length())
+            return true;
+    }
+#endif
+    return false;
+}
+
 void QOpenGLProgramBinaryCache::save(const QByteArray &cacheKey, uint programId)
 {
     if (!m_cacheWritable)
@@ -428,20 +451,20 @@ void QOpenGLProgramBinaryCache::save(const QByteArray &cacheKey, uint programId)
 
     writeUInt(&blobFormatPtr, blobFormat);
 
-#if QT_CONFIG(temporaryfile)
-    QSaveFile f(cacheFileName(cacheKey));
-    if (f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
-        f.write(blob);
-        if (!f.commit())
-#else
-    QFile f(cacheFileName(cacheKey));
-    if (f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
-        if (f.write(blob) < blob.length())
-#endif
-            qCDebug(lcOpenGLProgramDiskCache, "Failed to write %s to shader cache", qPrintable(f.fileName()));
-    } else {
-        qCDebug(lcOpenGLProgramDiskCache, "Failed to create %s in shader cache", qPrintable(f.fileName()));
+    QString filename = cacheFileName(cacheKey);
+    bool ok = writeFile(filename, blob);
+    if (!ok && m_currentCacheDir == m_globalCacheDir) {
+        m_currentCacheDir = m_localCacheDir;
+        m_cacheWritable = qt_ensureWritableDir(m_currentCacheDir);
+        qCDebug(lcOpenGLProgramDiskCache, "Cache location changed to '%s' writable = %d",
+                qPrintable(m_currentCacheDir), m_cacheWritable);
+        if (m_cacheWritable) {
+            filename = cacheFileName(cacheKey);
+            ok = writeFile(filename, blob);
+        }
     }
+    if (!ok)
+        qCDebug(lcOpenGLProgramDiskCache, "Failed to write %s to shader cache", qPrintable(filename));
 }
 
 #if defined(QT_OPENGL_ES_2)