diff options
author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2021-06-09 15:51:54 +0200 |
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committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2021-06-11 21:30:08 +0000 |
commit | de2c3ccd49cb89e0c6912da3b03705a36ef03946 (patch) | |
tree | d97f377b1b51cb5c61037ee168abb0f8e34e5ebb /src/gui/image/qpnghandler.cpp | |
parent | a0524a8443b153ca36b069f6f49551b1b5df7808 (diff) |
Fix reading gamma from PNGs without ICC profile
The decoding of PNG_INFO_gAMA to QColorSpace was incorrect, the PNG
gamma is the inverse of the gamma value we use. We revert it
everywhere else, just not here.
Pick-to: 6.2 5.15
Change-Id: Ic0ae1963b2dde3004cac8a6430ddaf99e7096915
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Diffstat (limited to 'src/gui/image/qpnghandler.cpp')
-rw-r--r-- | src/gui/image/qpnghandler.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp index 9943e7261a..c013a06813 100644 --- a/src/gui/image/qpnghandler.cpp +++ b/src/gui/image/qpnghandler.cpp @@ -627,10 +627,10 @@ bool QPngHandlerPrivate::readPngHeader() } if (primaries.areValid()) { colorSpace = QColorSpace(primaries.whitePoint, primaries.redPoint, primaries.greenPoint, primaries.bluePoint, - QColorSpace::TransferFunction::Gamma, fileGamma); + QColorSpace::TransferFunction::Gamma, 1.0f / fileGamma); } else { colorSpace = QColorSpace(QColorSpace::Primaries::SRgb, - QColorSpace::TransferFunction::Gamma, fileGamma); + QColorSpace::TransferFunction::Gamma, 1.0f / fileGamma); } colorSpaceState = GammaChrm; } |