PNG decoder: add debug warnings for mismatched gAMA/cHRM data

Relates to #612
tannerhelland · Dec 24, 2024 · 6b33e72 · 6b33e72
1 parent 5a2a662
commit 6b33e72
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/Classes/pdPNG.cls b/Classes/pdPNG.cls
@@ -1627,7 +1627,10 @@ Friend Function ImportStage6_PostProcessing(ByRef srcFile As String, ByRef dstDI
             rgbValues(7) = CDbl(chrmData(7)) / 100000#
             rgbValues(8) = 1#
 
-            If (Not gammaOK) Then gammaFloat = 1#
+            If (Not gammaOK) Then
+                If PNG_DEBUG_VERBOSE Then PDDebug.LogAction "WARNING: chromaticity present, but gamma missing; colors may be incorrect!"
+                gammaFloat = 1#
+            End If
 
             'Our next goal is to assemble an ICC profile that matches the chromaticity and/or gamma data.
             ' With this, we can use our normal color-management pipeline to color-correct this DIB.

diff --git a/PhotoDemon.vbp b/PhotoDemon.vbp
@@ -534,7 +534,7 @@ Description="PhotoDemon Photo Editor"
 CompatibleMode="0"
 MajorVer=2024
 MinorVer=12
-RevisionVer=4
+RevisionVer=5
 AutoIncrementVer=1
 ServerSupportFiles=0
 VersionComments="Copyright 2000-2024 Tanner Helland - photodemon.org"