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Doc: add hint about QMimeDatabase to QImageReader::canRead()

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Task-number: QTBUG-63568
Change-Id: I5b700138487dbebfc8cbe70eb3a076efceafb361
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>
This commit is contained in:
Eirik Aavitsland 2017-10-19 10:07:50 +02:00 committed by Liang Qi
parent 0261c22d41
commit 7c5475f1c0
1 changed files with 4 additions and 1 deletions
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src/gui/image/qimagereader.cpp
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@ -1211,10 +1211,13 @@ float QImageReader::gamma() const
see if the image data is valid. read() may still return false see if the image data is valid. read() may still return false
after canRead() returns \c true, if the image data is corrupt. after canRead() returns \c true, if the image data is corrupt.
\note A QMimeDatabase lookup is normally a better approach than this
function for identifying potentially non-image files or data.
For images that support animation, canRead() returns \c false when For images that support animation, canRead() returns \c false when
all frames have been read. all frames have been read.
\sa read(), supportedImageFormats() \sa read(), supportedImageFormats(), QMimeDatabase
*/ */
bool QImageReader::canRead() const bool QImageReader::canRead() const
{ {