shithub: misc

ref: 001e60ea4b45fec9cb40ab8fbbebc334b4d3e9f4
dir: misc/hidpi-1.patch

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 +200,7 @@
 	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
@@ -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/init.c
+++ b/sys/src/libdraw/init.c
@@ -197,6 +197,7 @@
 Display*
 initdisplay(char *dev, char *win, void(*error)(Display*, char*))
 {
+	uchar *a;
 	char buf[128], info[NINFO+1], *t, isnew;
 	int n, datafd, ctlfd, reffd;
 	Display *disp;
@@ -319,6 +320,18 @@
 	if(dir!=nil && dir->qid.vers==1)	/* other way to tell */
 		disp->_isnewdisplay = 1;
 	free(dir);
+
+	a = bufimage(disp, 3);
+	if(a == nil)
+		goto Error5;
+	a[0] = 'q';
+	a[1] = 1;
+	a[2] = 'd';
+	disp->dpi = 100;
+	if(flushimage(disp, 0) >= 0){
+		if((read(datafd, info, sizeof info)) == 12)
+			disp->dpi = atoi(info);
+	}
 
 	return disp;
 }