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On 3/17/21 8:51 AM, William F Pokorny wrote:
> On 3/16/21 1:47 PM, ingo wrote:
...
>
> --- Bug
...
>
Summary. Three issues found as a side effect of checking the v3.8 bit
depth feature.
A link to a more detailed thread given the web forums/news interface is
restored:
http://news.povray.org/povray.beta-test/thread/%3C60563168%241%40news.povray.org%3E/
---
1) In v3.8. Greyscale ppm/pgm output not respecting the File_Gamma
setting. Not a feature of v3.7.
2) In v3.8. The png sRGB chunk is not output unless the File_Gamma is
set to srgb though the default output uses srgb. Default png write and
immediate read won't match exactly. Release v3.7 looks OK to quick tests.
3) In v3.7 and v3.8. Incorrect greyscale png file input where bit
storage depth <= 8 and input is non-linear (gamma!=1). In v3.8 this the
default png greyscale write and read.
Aside: On the web view I currently see a mistaken, partial
povray.beta-test news post with the suffix part 1, which I immediately
deleted from Thunderbird. Please ignore it for the more recent and
complete thread.
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