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9term, mc: conspire to handle hidpi displays

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9term now uses the low bit of ws.ws_ypixel to signal
whether this is a hidpi display, and mc adjusts the font
it uses for columnation accordingly.

Makes 'lc' work right on hidpi displays.

Change-Id: I52928871ffb7f4c6fd6722f3d59f1836379148c6
Reviewed-on: https://plan9port-review.googlesource.com/2760
Reviewed-by: Russ Cox <rsc@swtch.com>
This commit is contained in:
Russ Cox 2017-01-06 10:35:12 -05:00
parent 657f699ef7
commit d296c18e37
2 changed files with 26 additions and 1 deletions
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19
src/cmd/draw/mc.c
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@ -268,9 +268,10 @@ void
getwidth(void)
{
CFsys *fs;
char buf[500], *p, *f[10];
char buf[500], *p, *q, *f[10];
int fd, n, nf;
struct winsize ws;
Font *f1;
if((p = getenv("winid")) != nil){
fs = nsmount("acme", "");
@ -306,6 +307,22 @@ getwidth(void)
if(ws.ws_xpixel == 0)
font = nil;
if(font){
// 9term leaves "is this a hidpi display" in the low bit of the ypixel height.
if(ws.ws_ypixel&1) {
// need hidpi font.
// loadhifpi creates a font that crashes in stringwidth,
// for reasons i don't understand.
// do it ourselves
p = getenv("font");
q = strchr(p, ',');
f1 = nil;
if(q != nil)
f1 = openfont(nil, q+1);
if(f1 != nil)
font = f1;
else
ws.ws_xpixel /= 2;
}
mintab = stringwidth(font, "0");
if((p = getenv("tabstop")) != nil)
tabwid = atoi(p)*mintab;