PDF Generation of Text is Poor on Chromebox |
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Issue descriptionVersion: M52 OS: Chrome OS What steps will reproduce the problem? (1) Obtain Chromebox or small laptop (2) Open page with lots of text e.g. https://www.google.com/intl/en-GB/policies/terms/ (3) Use print dialog to save as pdf What is the expected output? pdf rendered as seen on screen What do you see instead? poorly rendered text with odd spacing NOTE: Problem does not reproduce on Pixel 2. Problem seems to be missing from Windows, Mac, and Linux.
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Oct 11 2016
So the two attached PDFs are from different Chrome(OS) versions. Can you try a comparison with the same OS version on both machines?
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Nov 9 2016
I've taken new PDFs on a Kip and Samus running the current Beta build. The Kip is a test build. Version information: Google Chrome 55.0.2883.35 (Official Build) beta (64-bit) Revision 0 Platform 8872.35.0 (Official Build) beta-channel samus Google Chrome 55.0.2883.35 (Official Build) unknown (64-bit) Revision 0 Platform 8872.35.0 (Official Build) dev-channel kip test
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Nov 9 2016
Which is good and which is bad? KipGoogleTOS has indivifually spaced glyphs, as if the shaper was trying to do sub-pixel hinting. This may be related to https://crbug.com/640981 .
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Nov 9 2016
KipGoogleTOS is the bad example. Samus looks better but not fantastic. Looking at that bug, any chance we're rendering based on screen resolution?
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Nov 9 2016
Let's be precise: Blink is positioning glyphs based on the screen resolution. This is wrong, since the screen resolution is effectively infinite for a PDF.
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Nov 9 2016
That would make sense. Samus has a much higher DPI than Kip.
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Nov 9 2016
If the ratio of the font size to the DPI is high enough, hinting is turned off completely.
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Nov 17 2016
This explains so much. Is this a problem in Skia as well, or isolated to Blink?
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Nov 17 2016
this is all blink. BUG=chromium:640981
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Nov 17 2016
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Mar 9 2017
Bug 640981 got closed and there was a comment saying PDF generation looked better. Is this still a problem?
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Mar 9 2017
This is better, the main issue I see remaining still is issue 696356 .
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Mar 14 2017
skau: Are you happy with the current state of text generation? Are there other bugs that already cover the known issues?
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Mar 14 2017
It's significantly improved as far as I can tell. The letter spacing issue I originally reported is resolved.
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May 30 2017
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Aug 1 2017
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Jan 22 2018
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Comment 1 by thestig@chromium.org
, Aug 16 2016