Public bug reported: ImageViewer version: 42.0
ImageMagick version (should not matter, ImageMagick seems to be doing its work correctly and it's in another package, but dropping just FYI): $ convert --version Version: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org Copyright: (C) 1999-2021 ImageMagick Studio LLC License: https://imagemagick.org/script/license.php Features: Cipher DPC Modules OpenMP(4.5) Delegates (built-in): bzlib djvu fftw fontconfig freetype heic jbig jng jp2 jpeg lcms lqr ltdl lzma openexr pangocairo png tiff webp wmf x xml zlib I was following instructions on https://askubuntu.com/questions/867567/convert-jpg-or-png-to-ico-using- terminal-and-back and https://superuser.com/questions/491180/how-do-i- embed-multiple-sizes-in-an-ico-file to generate a Windows icon from separate pngs. While instructions like: $ convert icon_256.png -define icon:auto-resize=256,128,64,48,32,16 icon.ico and $ convert icon_256.png icon_128.png icon_64.png icon_32.png icon_16.png icon.ico will generate a Windows .ico that can be previewed without issues in Image Viewer, although it will only show the 128x128 image, not the bigger 256x256 (not sure if it's a bug or by design). If you swap sizes to put 256 at the end (you can also switch to ascending sizes but it's not necessary): $ convert icon_256.png -define icon:auto-resize=128,64,48,32,16,256 icon.ico and $ convert icon_128.png icon_64.png icon_32.png icon_16.png icon_256.png icon.ico will generate a proper .ico (textures are simply stored in a different order, as can be shown by extracting them with convert icon.icon extracted_icon.png) and looking at the generated files in order of numerical suffixes. but when opening icon.ico, ImageViewer will show a 128x128 image with only the bottom part filled with garbage pixels (see screenshot). ** Affects: eog (Ubuntu) Importance: Undecided Status: New ** Attachment added: "Screenshot of the garbage pixels shown by ImageViewer" https://bugs.launchpad.net/bugs/2021518/+attachment/5676342/+files/2023-05-29%20ImageViewer%20icon%20ending%20with%20256%20texture%20shows%20garbage.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to eog in Ubuntu. https://bugs.launchpad.net/bugs/2021518 Title: Image viewer incorrectly previews Windows ico as garbage pixels if last texture size is 256 Status in eog package in Ubuntu: New Bug description: ImageViewer version: 42.0 ImageMagick version (should not matter, ImageMagick seems to be doing its work correctly and it's in another package, but dropping just FYI): $ convert --version Version: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org Copyright: (C) 1999-2021 ImageMagick Studio LLC License: https://imagemagick.org/script/license.php Features: Cipher DPC Modules OpenMP(4.5) Delegates (built-in): bzlib djvu fftw fontconfig freetype heic jbig jng jp2 jpeg lcms lqr ltdl lzma openexr pangocairo png tiff webp wmf x xml zlib I was following instructions on https://askubuntu.com/questions/867567/convert-jpg-or-png-to-ico- using-terminal-and-back and https://superuser.com/questions/491180/how-do-i-embed-multiple-sizes- in-an-ico-file to generate a Windows icon from separate pngs. While instructions like: $ convert icon_256.png -define icon:auto-resize=256,128,64,48,32,16 icon.ico and $ convert icon_256.png icon_128.png icon_64.png icon_32.png icon_16.png icon.ico will generate a Windows .ico that can be previewed without issues in Image Viewer, although it will only show the 128x128 image, not the bigger 256x256 (not sure if it's a bug or by design). If you swap sizes to put 256 at the end (you can also switch to ascending sizes but it's not necessary): $ convert icon_256.png -define icon:auto-resize=128,64,48,32,16,256 icon.ico and $ convert icon_128.png icon_64.png icon_32.png icon_16.png icon_256.png icon.ico will generate a proper .ico (textures are simply stored in a different order, as can be shown by extracting them with convert icon.icon extracted_icon.png) and looking at the generated files in order of numerical suffixes. but when opening icon.ico, ImageViewer will show a 128x128 image with only the bottom part filled with garbage pixels (see screenshot). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/eog/+bug/2021518/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
