Always save PNG as a true colour image instead of possibly a palettised image when wxUSE_PALETTE is set to 0.
With wxUSE_PALETTE set to 0 and the user forcing to want a wxPNG_TYPE_PALETTE format the image would (partially) be marked as PNG_COLOR_TYPE_GRAY or PNG_COLOR_TYPE_GRAY_ALPHA instead and also saving would fail later on. Instead detect this specific case and save in the wxPNG_TYPE_COLOUR format. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66590 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@@ -772,6 +772,11 @@ bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbos
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}
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#else
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bool bUsePalette = false;
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if (iColorType == wxPNG_TYPE_PALETTE)
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{
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iColorType = wxPNG_TYPE_COLOUR;
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}
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#endif // wxUSE_PALETTE
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bool bUseAlpha = !bUsePalette && (bHasAlpha || bHasMask);
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