diff options
Diffstat (limited to 'src/gui/image/qimagereader.cpp')
| -rw-r--r-- | src/gui/image/qimagereader.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp index ba79bf40e5..83ec91bb40 100644 --- a/src/gui/image/qimagereader.cpp +++ b/src/gui/image/qimagereader.cpp @@ -1203,6 +1203,39 @@ bool QImageReader::autoTransform() const } /*! + \since 5.6 + + This is an image format specific function that forces images with + gamma information to be gamma corrected to \a gamma. For image formats + that do not support gamma correction, this value is ignored. + + To gamma correct to a standard PC color-space, set gamma to \c 1/2.2. + + \sa gamma() +*/ +void QImageReader::setGamma(float gamma) +{ + if (d->initHandler() && d->handler->supportsOption(QImageIOHandler::Gamma)) + d->handler->setOption(QImageIOHandler::Gamma, gamma); +} + +/*! + \since 5.6 + + Returns the gamma level of the decoded image. If setGamma() has been + called and gamma correction is supported it will return the gamma set. + If gamma level is not supported by the image format, \c 0.0 is returned. + + \sa setGamma() +*/ +float QImageReader::gamma() const +{ + if (d->initHandler() && d->handler->supportsOption(QImageIOHandler::Gamma)) + return d->handler->option(QImageIOHandler::Gamma).toFloat(); + return 0.0; +} + +/*! Returns \c true if an image can be read for the device (i.e., the image format is supported, and the device seems to contain valid data); otherwise returns \c false. |