Dusan Popovic wrote:
> On 28/09/21, Bram Moolenaar wrote: > > If you now also use the special handling for some ASCII characters, > > perhaps the special casing can just be skipped? > > Current state of affairs in gvim: > > - glyphs are prerendered at ascii_glyph_table_init > - non-bold non-italic ascii < 128 is rendered with glyphs > - bold, italic, string with single >128 char, all falls down to Pango > - big string ready to use glyphs but having single complex utf-8 char > will fall trough to be rendered with Pango. > > Pango is not optimal: > > - Not measured but very visible: In my c++ projects at work color scheme > renders renders function names in bold, which fall down to Pango. When > I quickly scroll trough region with 'more' bold content, scroll > becomes erratic, with more normal text it becomes smoother. > > Current patch I am working on > (https://github.com/dusanx/vim/commit/a00791cd3c0df7d921bb4188df1c165de04961d3) > additionally splits strings into clear ascii/everything else parts, > which then go trough glyphs or Pango. Result is rendering with Pango > only what we can't avoid and using glyphs for everything else. Almost a > side effect is proper ligatures support. > > When that is done, in next PR, I intend to introduce cache for bold and > italic glyphs, same as we do for normal text. There is no need to treat > bold differently and use Pango for that. > > In short using Pango as little as possible should be valid gvim > optimization. Using Pango for everything because of few ligatures and > emojis should be avoided because of the visible speed penalty. However > if you see some obstacle for this plan please let me know. Sounds good. I would think that italic isn't used much, but if it's just another entry with the same code we might as well cache that too. -- hundred-and-one symptoms of being an internet addict: 89. In addition to your e-mail address being on your business cards you even have your own domain. /// Bram Moolenaar -- b...@moolenaar.net -- http://www.Moolenaar.net \\\ /// \\\ \\\ sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ /// \\\ help me help AIDS victims -- http://ICCF-Holland.org /// -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to vim_dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/vim_dev/20210930134850.C4E99C80054%40pakwach.
