459415 2022-09-19 22:54:33 +0000 Krita exports weirdly huge pngs when colorspace conversion is involved 2022-09-20 12:58:16 +0000 1 1 2 Applications krita File formats 5.1.1 Microsoft Windows All RESOLVED INVALID NOR normal --- 0 raincolee krita-bugs-null halla 0 oldest_to_newest 2154402 0 raincolee 2022-09-19 22:54:33 +0000 SUMMARY The pngs exported from Krita are really huge when the .kra is in a colorspace and .png is converted to sRGB during export. STEPS TO REPRODUCE 1. Open test.kra in Krita 2. File -> Export -> Save as Type: png 3. Export with default options OBSERVED RESULT The exported png is 2.39MB EXPECTED RESULT The exported png is much smaller than that. I opened the exported file in Windows' built-in Photos, save a copy of it, and it's only 767KB. If I converted the .kra in Krita and then exported it, it's about 400KB only. SOFTWARE/OS VERSIONS Krita Version: 5.1.1 Qt Version (compiled): 5.12.12 ADDITIONAL INFORMATION test.kra is attached 2154403 1 raincolee 2022-09-19 22:55:56 +0000 test.kra is too large to be uploaded as an attachment. please download it here: https://drive.google.com/file/d/1g3wUlCMUCokH0O2qvt-y_YnB9WOmvyvJ/view?usp=sharing 2154471 2 halla 2022-09-20 07:36:28 +0000 Yes, well, Photos doesn't support 16 bit/channel PNG, which krita does support. Converting to sRGB does not drop the channel depth to 8 bit/channel. 2154552 3 raincolee 2022-09-20 10:42:56 +0000 (In reply to Halla Rempt from comment #2) > Yes, well, Photos doesn't support 16 bit/channel PNG, which krita does > support. Converting to sRGB does not drop the channel depth to 8 bit/channel. Is there an option to drop it to 8bit at export? 2154555 4 halla 2022-09-20 10:47:33 +0000 No... You'll have to manually convert the channel depth for that. 2154586 5 halla 2022-09-20 12:57:59 +0000 Git commit 59425a042fc3208e3e5d6101796affb7d4656d69 by Halla Rempt. Committed on 20/09/2022 at 12:57. Pushed by rempt into branch 'master'. Add an option to convert to 8 bit/channel when exporting to PNG M +5 -4 libs/ui/kis_png_converter.cpp M +2 -1 libs/ui/kis_png_converter.h M +6 -2 plugins/impex/png/kis_png_export.cc M +86 -79 plugins/impex/png/kis_wdg_options_png.ui https://invent.kde.org/graphics/krita/commit/59425a042fc3208e3e5d6101796affb7d4656d69 2154587 6 halla 2022-09-20 12:58:16 +0000 Git commit 0db7c21cae65789370386f58c762dbc96e492d06 by Halla Rempt. Committed on 20/09/2022 at 12:58. Pushed by rempt into branch 'krita/5.1'. Add an option to convert to 8 bit/channel when exporting to PNG (cherry picked from commit 59425a042fc3208e3e5d6101796affb7d4656d69) M +5 -4 libs/ui/kis_png_converter.cpp M +2 -1 libs/ui/kis_png_converter.h M +6 -2 plugins/impex/png/kis_png_export.cc M +86 -79 plugins/impex/png/kis_wdg_options_png.ui https://invent.kde.org/graphics/krita/commit/0db7c21cae65789370386f58c762dbc96e492d06