ref: 4e7da28c9aec8d91f9484a55b19c762d828a34f3
parent: 437dd078d386f429501f374306dcfdd536d13093
author: Philip Silva <philip.silva@protonmail.com>
date: Sat Sep 18 08:48:11 EDT 2021
patch for adding int dpi fields in dev/libdraw
--- a/README
+++ b/README
@@ -1,3 +1,5 @@
Various unsorted stuff
+- hidpi-1.patch: wip from p9p to add dpi field to Display
+ (p9p commit d0e0701913f3aede1fcb256f3d1e9c60c9a)
- acme-at.patch: can be applied to open paths containing @s (e.g. the internal Go module paths)
--- /dev/null
+++ b/hidpi-1.patch
@@ -1,0 +1,114 @@
+diff c7dcc82b0be805717efbe77c98eaadf3ee1e31af uncommitted
+--- a/sys/include/ape/draw.h
++++ b/sys/include/ape/draw.h
+@@ -208,6 +208,7 @@
+ Image *windows;
+ Image *screenimage;
+ int _isnewdisplay;
++ int dpi;
+ };
+
+ struct Image
+--- a/sys/include/draw.h
++++ b/sys/include/draw.h
+@@ -200,6 +200,10 @@
+ Image *windows;
+ Image *screenimage;
+ int _isnewdisplay;
++ int dpi;
+ };
+
+ struct Image
+--- a/sys/src/9/port/devdraw.c
++++ b/sys/src/9/port/devdraw.c
+@@ -77,6 +77,8 @@
+ int refreshme;
+ int infoid;
+ int op;
++ int displaydpi;
++ int forcedpi;
+ };
+
+ struct Refresh
+@@ -166,6 +168,8 @@
+ void drawfreedimage(DImage*);
+ Client* drawclientofpath(ulong);
+ DImage* allocdimage(Memimage*);
++
++int displaydpi = 100;
+
+ static char Enodrawimage[] = "unknown id for draw image";
+ static char Enodrawscreen[] = "unknown id for draw screen";
+@@ -785,6 +789,7 @@
+ cl->slot = i;
+ cl->clientid = ++sdraw.clientid;
+ cl->op = SoverD;
++ cl->displaydpi=100;
+ sdraw.client[i] = cl;
+ return cl;
+ }
+@@ -1396,6 +1401,7 @@
+ int c, repl, m, y, dstid, scrnid, ni, ci, j, nw, e0, e1, op, ox, oy, oesize, esize, doflush;
+ uchar *u, *a, refresh;
+ char *fmt;
++ Fmt f;
+ ulong value, chan;
+ Rectangle r, clipr;
+ Point p, q, *pp, sp;
+@@ -1643,6 +1649,35 @@
+ font->nfchar = ni;
+ font->ascent = a[9];
+ continue;
++
++ /* query: 'Q' n[1] queryspec[n] */
++ case 'q':
++ if(n < 2) {++ error(Eshortdraw);
++ }
++ m = 1+1+a[1];
++ if(n < m) {++ error(Eshortdraw);
++ }
++ fmtstrinit(&f);
++ for(c=0; c<a[1]; c++) {++ switch(a[2+c]) {++ default:
++ error("unknown query");++ case 'd': /* dpi */
++ if(client->forcedpi)
++ fmtprint(&f, "%11d ", client->forcedpi);
++ else
++ fmtprint(&f, "%11d ", client->displaydpi);
++ break;
++ }
++ }
++ client->readdata = (uchar*)fmtstrflush(&f);
++ if(client->readdata == nil)
++ error(Enomem);
++ client->nreaddata = strlen((char*)client->readdata);
++ continue;
++
+
+ /* load character: 'l' fontid[4] srcid[4] index[2] R[4*4] P[2*4] left[1] width[1] */
+ case 'l':
+--- a/sys/src/libdraw/alloc.c
++++ b/sys/src/libdraw/alloc.c
+@@ -170,6 +170,19 @@
+ i->clipr.max.y = atoi(buf+11*12);
+ i->screen = nil;
+ i->next = nil;
++
++ /* flush pending data so we don't get error allocating the image */
++ flushimage(d, 0);
++ a = bufimage(d, 3);
++ if(a == nil)
++ goto Error;
++ a[0] = 'q';
++ a[1] = 1;
++ a[2] = 'd';
++ d->dpi = 100;
++ if (flushimage(d, 0) >= 0 && pread(d->ctlfd, buf, 12, 0) == 12)
++ d->dpi = atoi(buf);
+ return i;
+ }
+