character input display upside down

[dns007]

Hi, when I connect to Centos 7 , the characters input in terminal display upside down .but refresh the page the characters display normal , why?
Thanks.

[jsaathof]

Same with me. I am running websockify on openSUSE Leap 15. I have read about a patch in the spice-html5 client for fixing topdown rendering.

[doccaz]

I found this particularly annoying while dealing with text-mode.

I noticed that the original spice5-html had this issue as well, and it was fixed in this patch:
https://cgit.freedesktop.org/~pgrunt/spice-html5/commit/?h=topdown

... which if I understood correctly, is just implementing a "topdown" (e.g. invert the coordinates for drawing) on a particular packet type/color depth, SPICE_SURFACE_FMT_32_xRGB.

Looking through the sources for the eyeOS web client, I found this in lib/images/bitmap.js:

                if(!topdown) {
                        ret = wdi.RasterOperation.flip(ret);
                }

Looking further up, we find the part of the code that deals with 32-bit color packets. It's called wdi.SpiceBitmapFmt.SPICE_BITMAP_FMT_32BIT here.
To fix it, just add a " topdown = true" statement:

                      if (type === wdi.SpiceBitmapFmt.SPICE_BITMAP_FMT_32BIT) {
                                // FIX: setting topdown to TRUE avoids the "flip screen" effect on text modes
                                topdown = true;
                                for (pos = 0; pos < size; pos += 4) {
                                        b = data[pos];
                                        data[pos] = data[pos + 2];
                                        data[pos + 2] = b;
                                        data[pos + 3] = 255;
                                }

Will do a pull request later (if they're ever going to accept them, that's another story -- some have been in queue for two years).