Emotes

[Mark E. Shoulson]

Will have to look more closely at this, but it sounds to me like we 
already have that, at least twice:

https://en.wikipedia.org/wiki/Sixel

https://en.wikipedia.org/wiki/ReGIS

There are terminal emulators that support these.

~mark

On 8/5/22 09:36, William_J_G Overington via Unicode wrote:
> Sławomir Osipiuk wrote as follows.
>
>> The one legitimate issue is that maybe you want the syntax to be 
>> default-ignorable "for free" on platforms that don't support it and 
>> the existing unicode tag characters look mighty tempting.
>
> It seems to me that one could have a graphics format that defaults 
> gracefully to give an indication of the intended graphic by using a 
> few symbols each accompanied by a Variation Selector, for example 
> herein, U+FE0C VARIATION SELECTOR-13.
>
> Whereas, there are
>
> U+25A0 BLACK SQUARE
> U+25A1 WHITE SQUARE
> U+2605 BLACK STAR
>
> One could have the following.
>
> Ordinary Unicode display is called text mode
> The is also graphics mode.
>
> The sequence U+25A0 U+FE0C means
>
> begin
> if in text mode then
> begin
> enter graphics mode;
> start a graphic with a black pixel in the upper left corner;
> set next_place be one pixel to the right of that black pixel;
> end
> elsif in graphics mode then
> begin
> place a black pixel at next_place;
> set next_place be one pixel to the right of that black pixel;
> end;
> end.
>
> The sequence U+25A1 U+FE0C means
>
> begin
> if in text mode then
> begin
> enter graphics mode;
> start a graphic with a white pixel in the upper left corner;
> set next_place be one pixel to the right of that white pixel;
> end
> elsif in graphics mode then
> begin
> place a white pixel at next_place;
> set next_place be one pixel to the right of that white pixel;
> end;
> end.
>
> The sequence U+2605 U+FE0C means
>
> begin
> if in graphics mode then
> begin
> set next_place to be at the start of the next row of the graphic;
> end;
> end.
>
> In graphics mode, carriage return, linefeed and space are ignored.
>
> In graphics mode, any character received that is not a graphics mode 
> sequence causes graphics mode to be left gracefully and the received 
> character to be displayed in text mode after the graphic, the graphic 
> continuing to be displayed.
>
> ----
>
> The above describes a first attempt to produce something to discuss.
>
> The capabality of the system could be extended to include colours.
>
> The capability of the system could be extended to produce 3d images 
> too by using
> U+25CB WHITE CIRCLE and
> U+25B2 BLACK UP-POINTING TRIANGLE
>
> The sequence U+25CB U+FE0C means
>
> begin
> if in text mode then
> begin
> enter graphics mode;
> start a graphic with a transparent pixel in the upper left corner;
> set next_place be one pixel to the right of that transparent pixel;
> end
> elsif in graphics mode then
> begin
> place a transparent pixel at next_place;
> set next_place be one pixel to the right of that transparent pixel;
> end;
> end.
>
> The sequence U+25B2 U+FE0C means
>
> begin
> if in graphics mode then
> begin
> set next_place to be at the start of the first pixel of the first row 
> of the graphic, one layer forward of the present layer;
> end;
> end.
>
> In 3d images, each pixel would be regarded as a voxel.
>
> Someone typesetting such a graphic could thus include carriage return 
> and line feed characters as they would not affect the graphic display 
> but would help to provide a graceful fallback display.
>
> To help in providing a graceful fallback display, U+25B6 BLACK 
> RIGHT-POINTING TRIANGLE could be used in the system.
>
> The sequence U+25B6 U+FE0Cmeans
>
> begin
> enter graphics mode;
> set next_place at the upper left corner;
> end.
>
> could be used folowed by carriage return and line feed, if so desired.
>
> That would mean that the fallback display would start on a new line of 
> the display rather than the first line of the fallback display not 
> being aligned with subsequent lines of the fallback display.
>
>  William Overington
>
> Friday 5 August 2022