popup: follow GDK_SCALE on HiDPI

The popup was 32-pixel rows whatever the display; next to 2x application
text it was small. Its metrics now scale with the daemon's GDK_SCALE,
the setting the applications use.

dat.h

@@ -18,12 +18,6 @@ enum
 	LangEMOJI	= 0x05,
 	LangVI	= 0x16,
 
-	Fontsz	= 32,
-	PopupPad	= 4,
-	PopupSep	= 1,
-	PopupNumw	= Fontsz,
-	PopupTextw	= 12*Fontsz,
-	PopupBasew	= 2*PopupPad + PopupNumw + PopupTextw,
 	Maxrunes	= 64,
 	Maxutf	= Maxrunes * UTFmax + 1,
 };
@@ -33,7 +27,6 @@ enum
 	Maxclients	= 64,
 	Maxkouho	= 128,
 	Maxdisp		= 9,
-	Imgh		= 2*PopupPad + (Maxdisp + 2)*Fontsz + PopupSep,
 
 	Colfg	= 0x000000,
 	Colbg	= 0xffffff,
@@ -42,6 +35,16 @@ enum
 	Colselfg	= 0xffffff,
 };
 
+/* Popup metrics in pixels; popupscale is GDK_SCALE, for HiDPI. */
+extern int popupscale;
+#define Fontsz		(32*popupscale)
+#define PopupPad	(4*popupscale)
+#define PopupSep	popupscale
+#define PopupNumw	Fontsz
+#define PopupTextw	(12*Fontsz)
+#define PopupBasew	(2*PopupPad + PopupNumw + PopupTextw)
+#define Imgh		(2*PopupPad + (Maxdisp + 2)*Fontsz + PopupSep)
+
 typedef struct Str Str;
 struct Str
 {