内容简介:April 1st seems like as good a time as any for a newChafa releaseAs usual, you can get itThanks to this 90s-era technology, you can print excellent-looking graphics directly in the terminal with no need for character cell mosaics or hacky solutions like w3
April 1st seems like as good a time as any for a newChafa release — though note that Chafa is no joke. At least not anymore, what with the extremely enterprise-ready sixel pipeline and all.
As usual, you can get it from the download page or from Github . There are also release notes . Here are the highlights:
Sixel output
Thanks to this 90s-era technology, you can print excellent-looking graphics directly in the terminal with no need for character cell mosaics or hacky solutions like w3mimagedisplay (from w3m ) or Überzug . It works entirely using ANSI escape sequence extensions, so it’s usable over ssh, telnet and that old 2400 baud modem you found in grandma’s shed.
The most complete existing implementation is probably Hayaki Saito’s libsixel , but I chose to write one from scratch for Chafa, since sixel output is remarkably intensive computationally, and I wanted to employ a combination of advanced techniques (parallelism, quantization using a PCA approach, SIMD scaling) and corner-cutting that wouldn’t have been appropriate in that library. This gets me fast animation playback and makes it easier to phase out the ImageMagick dependency in the long term.
There are at least two widely available virtual terminals that support sixels: One is XTerm (when compiled with --enable-sixel
), and the other is mlterm. Unfortunately, I don’t think either is widely used compared to distribution defaults like GNOME Terminal and Konsole, so here’s hoping for more mainstream support for this feature.
Glyph import
If sixels aren’t your cup of tea, symbol mode has a new trick for you too. It’s --glyph-file
, which allows you to load glyphs from external fonts into Chafa’s symbol map. This can give it a better idea of what your terminal font looks like and allows support for more exotic symbols or custom fonts to suit any respectable retro graphics art project.
Keep in mind that you still need to select the appropriate symbol ranges with --symbols
and/or --fill
. These options now allow specifying precise Unicode ranges, e.g. --symbols 20,41..5a
to emit only ASCII spaces and uppercase letters.
Color extraction
In symbol mode, each cell’s color pair is now based on the median color of the underlying pixels instead of the average. Now this isn’t exactly a huge feature, at least not in terms of effort, but it can make a big difference for certain images, especially line art. You can get the old behavior back with --color-extractor average
.
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持 码农网
猜你喜欢:本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们。
数据库系统概念
Abraham Silberschatz、Henry F. Korth、S. Sudarshan / 杨冬青、马秀莉、唐世渭 / 机械工业 / 2006-10-01 / 69.50元
本书是数据库系统方面的经典教材之一。国际上许多著名大学包括斯坦福大学、耶鲁大学、得克萨斯大学、康奈尔大学、伊利诺伊大学、印度理工学院等都采用本书作为教科书。我国也有许多所大学采用本书以前版本的中文版作为本科生和研究生的数据库课程的教材和主要教学参考书,收到了良好的效果。 本书调整和新增内容:调整了第4版的讲授顺序。首先介绍SQL及其高级特性,使学生容易接受数据库设计的概念。新增数据库设计的专......一起来看看 《数据库系统概念》 这本书的介绍吧!