diff options
| -rw-r--r-- | src/gui/image/qimagereader.cpp | 27 | ||||
| -rw-r--r-- | tests/auto/gui/image/qicoimageformat/tst_qicoimageformat.cpp | 8 |
2 files changed, 29 insertions, 6 deletions
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp index 25b9698559..6a0763e696 100644 --- a/src/gui/image/qimagereader.cpp +++ b/src/gui/image/qimagereader.cpp @@ -197,7 +197,7 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device, #ifdef QIMAGEREADER_DEBUG qDebug() << "QImageReader::createReadHandler( device =" << (void *)device << ", format =" << format << ")," - << keyMap.size() << "plugins available: " << keyMap.values(); + << keyMap.uniqueKeys().size() << "plugins available: " << keyMap; #endif int suffixPluginIndex = -1; @@ -325,6 +325,29 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device, #endif } + if (handler && device && !suffix.isEmpty()) { + Q_ASSERT(qobject_cast<QFile *>(device)); + // We have a file claiming to be of a recognized format. Now confirm that + // the handler also recognizes the file contents. + const qint64 pos = device->pos(); + handler->setDevice(device); + if (!form.isEmpty()) + handler->setFormat(form); + bool canRead = handler->canRead(); + device->seek(pos); + if (canRead) { + // ok, we're done. + return handler; + } +#ifdef QIMAGEREADER_DEBUG + qDebug() << "QImageReader::createReadHandler: the" << suffix << "handler can not read this file"; +#endif + // File may still be valid, just with wrong suffix, so fall back to + // finding a handler based on contents, below. + delete handler; + handler = nullptr; + } + #ifndef QT_NO_IMAGEFORMATPLUGIN if (!handler && (autoDetectImageFormat || ignoresFormatAndExtension)) { // check if any of our plugins recognize the file from its contents. @@ -336,7 +359,7 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device, if (plugin && plugin->capabilities(device, QByteArray()) & QImageIOPlugin::CanRead) { handler = plugin->create(device, testFormat); #ifdef QIMAGEREADER_DEBUG - qDebug() << "QImageReader::createReadHandler: the" << keyMap.keys().at(i) << "plugin can read this data"; + qDebug() << "QImageReader::createReadHandler: the" << keyMap.value(i) << "plugin can read this data"; #endif break; } diff --git a/tests/auto/gui/image/qicoimageformat/tst_qicoimageformat.cpp b/tests/auto/gui/image/qicoimageformat/tst_qicoimageformat.cpp index 2dbb078ae0..fe12175081 100644 --- a/tests/auto/gui/image/qicoimageformat/tst_qicoimageformat.cpp +++ b/tests/auto/gui/image/qicoimageformat/tst_qicoimageformat.cpp @@ -164,7 +164,7 @@ void tst_QIcoImageFormat::imageCount_data() QTest::newRow("16px,32px - 16 colors") << "valid/TIMER01.ICO" << 2; QTest::newRow("16px16c, 32px32c, 32px256c 1") << "valid/WORLD.ico" << 3; QTest::newRow("16px16c, 32px32c, 32px256c 2") << "valid/WORLDH.ico" << 3; - QTest::newRow("invalid floppy (first 8 bytes = 0xff)") << "invalid/35floppy.ico" << 0; + QTest::newRow("invalid floppy (first 8 bytes = 0xff)") << "invalid/35floppy.ico" << -1; QTest::newRow("includes 32BPP w/alpha") << "valid/semitransparent.ico" << 9; QTest::newRow("PNG compression") << "valid/Qt.ico" << 4; QTest::newRow("CUR file") << "valid/yellow.cur" << 1; @@ -177,7 +177,6 @@ void tst_QIcoImageFormat::imageCount() QImageReader reader(m_IconPath + QLatin1Char('/') + fileName); QCOMPARE(reader.imageCount(), count); - } void tst_QIcoImageFormat::jumpToNextImage_data() @@ -218,7 +217,7 @@ void tst_QIcoImageFormat::loopCount_data() QTest::addColumn<int>("count"); QTest::newRow("floppy (16px,32px - 16 colors)") << "valid/35FLOPPY.ICO" << 0; - QTest::newRow("invalid floppy (first 8 bytes = 0xff)") << "invalid/35floppy.ico" << 0; + QTest::newRow("invalid floppy (first 8 bytes = 0xff)") << "invalid/35floppy.ico" << -1; } void tst_QIcoImageFormat::loopCount() @@ -228,6 +227,7 @@ void tst_QIcoImageFormat::loopCount() QImageReader reader(m_IconPath + QLatin1Char('/') + fileName); QCOMPARE(reader.loopCount(), count); + QCOMPARE(reader.canRead(), count < 0 ? false : true); } void tst_QIcoImageFormat::nextImageDelay_data() @@ -256,7 +256,7 @@ void tst_QIcoImageFormat::nextImageDelay() QImageReader reader(m_IconPath + QLatin1Char('/') + fileName); if (count == -1) { - QCOMPARE(reader.nextImageDelay(), 0); + QCOMPARE(reader.nextImageDelay(), -1); } else { int i; for (i = 0; i < count; i++) { |