本文整理汇总了C++中DImg::transform方法的典型用法代码示例。如果您正苦于以下问题：C++ DImg::transform方法的具体用法？C++ DImg::transform怎么用？C++ DImg::transform使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DImg的用法示例。
在下文中一共展示了DImg::transform方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: exifTransform
bool JpegRotator::exifTransform(const MetaEngineRotation& matrix)
{
FileWriteLocker lock(m_destFile);
QFileInfo fi(m_file);
if (!fi.exists())
{
qCDebug(DIGIKAM_GENERAL_LOG) << "ExifRotate: file does not exist: " << m_file;
return false;
}
if (!isJpegImage(m_file))
{
// Not a jpeg image.
qCDebug(DIGIKAM_GENERAL_LOG) << "ExifRotate: not a JPEG file: " << m_file;
return false;
}
QList<TransformAction> actions = matrix.transformations();
if (actions.isEmpty())
{
if (m_file != m_destFile)
{
copyFile(m_file, m_destFile);
}
return true;
}
QString dest = m_destFile;
QString src = m_file;
QString dir = fi.absolutePath();
QStringList unlinkLater;
for (int i=0; i<actions.size(); i++)
{
SafeTemporaryFile* const temp = new SafeTemporaryFile(dir + QLatin1String("/JpegRotator-XXXXXX.digikamtempfile.jpg"));
temp->setAutoRemove(false);
temp->open();
QString tempFile = temp->fileName();
// Crash fix: a QTemporaryFile is not properly closed until its destructor is called.
delete temp;
if (!performJpegTransform(actions[i], src, tempFile))
{
qCDebug(DIGIKAM_GENERAL_LOG) << "JPEG lossless transform failed for" << src;
// See bug 320107 : if lossless transform cannot be achieve, do lossy transform.
DImg srcImg;
qCDebug(DIGIKAM_GENERAL_LOG) << "Trying lossy transform for " << src;
if (!srcImg.load(src))
{
::unlink(QFile::encodeName(tempFile).constData());
return false;
}
if (actions[i] != MetaEngineRotation::NoTransformation)
{
srcImg.transform(actions[i]);
}
srcImg.setAttribute(QLatin1String("quality"), getJpegQuality(src));
if (!srcImg.save(tempFile, DImg::JPEG))
{
qCDebug(DIGIKAM_GENERAL_LOG) << "Lossy transform failed for" << src;
::unlink(QFile::encodeName(tempFile).constData());
return false;
}
qCDebug(DIGIKAM_GENERAL_LOG) << "Lossy transform done for " << src;
}
if (i+1 != actions.size())
{
// another round
src = tempFile;
unlinkLater << tempFile;
continue;
}
// finalize
updateMetadata(tempFile, matrix);
// atomic rename
if (DMetadata::hasSidecar(tempFile))
{
QString sidecarTemp = DMetadata::sidecarPath(tempFile);
QString sidecarDest = DMetadata::sidecarPath(dest);
#ifdef Q_OS_WIN
if (::MoveFileEx((LPCWSTR)sidecarTemp.utf16(), (LPCWSTR)sidecarDest.utf16(), MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH) == 0)
#else
if (::rename(QFile::encodeName(sidecarTemp).constData(), QFile::encodeName(sidecarDest).constData()) != 0)
//.........这里部分代码省略.........