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| author | Victor Kareh <[email protected]> | 2019-07-08 17:06:28 -0400 |
|---|---|---|
| committer | raveit65 <[email protected]> | 2019-09-12 15:59:22 +0200 |
| commit | 3bdabe92391f3dbc72b3cdafdd6b7caddb7311e6 (patch) | |
| tree | 26a71206ef04120407512f8d2686871d9619600d /src | |
| parent | 1cfb72d9017f302eddcc3f8f85cfd6bcb3d17d51 (diff) | |
| download | eom-3bdabe92391f3dbc72b3cdafdd6b7caddb7311e6.tar.bz2 eom-3bdabe92391f3dbc72b3cdafdd6b7caddb7311e6.tar.xz | |
EomMetadataReaderPNG: Only build profile from cHRM if gAMA is present
It's more likely that such an image had a (stripped) sRGB profile or chunk.
And thus rather than trying to build a profile from only half the necessary
information, eom should not.
https://bugzilla.gnome.org/show_bug.cgi?id=725359
upstream commit:
https://gitlab.gnome.org/GNOME/eog/commit/78c0153e
Diffstat (limited to 'src')
| -rw-r--r-- | src/eom-metadata-reader-png.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/src/eom-metadata-reader-png.c b/src/eom-metadata-reader-png.c index 8ad2405..ebf2ddf 100644 --- a/src/eom-metadata-reader-png.c +++ b/src/eom-metadata-reader-png.c @@ -574,11 +574,11 @@ eom_metadata_reader_png_get_icc_profile (EomMetadataReaderPng *emr) profile = cmsCreate_sRGBProfile (); } - if (!profile && priv->cHRM_chunk) { + if (!profile && priv->cHRM_chunk && priv->gAMA_chunk) { cmsCIExyY whitepoint; cmsCIExyYTRIPLE primaries; cmsToneCurve *gamma[3]; - double gammaValue = 2.2; // 2.2 should be a sane default gamma + double gammaValue; /* This uglyness extracts the chromacity and whitepoint values * from a PNG's cHRM chunk. These can be accurate up to the @@ -597,14 +597,9 @@ eom_metadata_reader_png_get_icc_profile (EomMetadataReaderPng *emr) primaries.Blue.x = EXTRACT_DOUBLE_UINT_BLOCK_OFFSET (priv->cHRM_chunk, 6, 100000); primaries.Blue.y = EXTRACT_DOUBLE_UINT_BLOCK_OFFSET (priv->cHRM_chunk, 7, 100000); - primaries.Red.Y = primaries.Green.Y = primaries.Blue.Y = 1.0; - - /* If the gAMA_chunk is present use its value which is saved - * the same way as the whitepoint. Use 2.2 as default value if - * the chunk is not present. */ - if (priv->gAMA_chunk) - gammaValue = (double) 1.0/EXTRACT_DOUBLE_UINT_BLOCK_OFFSET (priv->gAMA_chunk, 0, 100000); + whitepoint.Y = primaries.Red.Y = primaries.Green.Y = primaries.Blue.Y = 1.0; + gammaValue = (double) 1.0/EXTRACT_DOUBLE_UINT_BLOCK_OFFSET (priv->gAMA_chunk, 0, 100000); gamma[0] = gamma[1] = gamma[2] = cmsBuildGamma (NULL, gammaValue); profile = cmsCreateRGBProfile (&whitepoint, &primaries, gamma); |