shithub: pdffs

Download patch

ref: a4a05ae434545d03ea8981e7aa4cc215bee577d7
parent: b22596ba7641a3f996b53ced14906e212a84220e
author: Noam Preil <[email protected]>
date: Mon Apr 24 02:21:37 EDT 2023

fix rendering!

--- a/op.c
+++ b/op.c
@@ -573,13 +573,10 @@
 		werrstr("Text objects must not be nested");
 		return 0;
 	}
-	matidentity(p->TS.Tm);
-	matidentity(p->TS.Tlm);
 	p->TS.inobj = 1;
-	p->TS.TL = 0;
-	p->TS.Tc = 0;
-	p->TS.Tw = 0;
 	p->GSactive->Font.font = nil;
+	matidentity(p->TS.Tm);
+	matidentity(p->TS.Tlm);
 	return flagless(op);
 }
 
@@ -723,12 +720,16 @@
 	return bufput(&p->buf, (uchar*)&c, 1) == 1;
 }
 
+// Returns glyph width in TEXT SPACE units.
 static double
 glyphwidth(Page *p, ulong c)
 {
-	if(c >= p->GSactive->Font.first && c <= p->GSactive->Font.last)
-		return (double)p->GSactive->Font.widths[c - p->GSactive->Font.first] / 1000;
-	return (double)p->GSactive->Font.defwidth / 1000;
+	// TODO: type 3 fonts have explicit metrics? See 9.2.4 / 9.6.5 of the spec.
+	// For all other fonts, units are 1/1000th of text space
+	double gwidth = 420;
+//	if(c >= p->GSactive->Font.first && c <= p->GSactive->Font.last)
+//		gwidth = p->GSactive->Font.widths[c - p->GSactive->Font.first];
+	return gwidth / 1000;
 }
 
 static double
@@ -757,11 +758,10 @@
 	// Check if whitespace is needed
 	if(p->buf.sz > 1){
 		if(p->TS.y != Trm[5]){
-			for(i = 0; i < (int)((p->TS.y - Trm[5]) / p->GSactive->Font.size) && i < 1; i += 1)
+			for(i = 0; i < (int)((Trm[5] - p->TS.y) / p->GSactive->Font.size / 1.5) && i < 2; i += 1)
 				if(bufput(&p->buf, (uchar*)"\n", 1) != 1)
 					return 0;
-		}
-		if(Trm[4] - p->TS.x > 14){
+		} else if(Trm[4] - p->TS.x > 5) {
 			if(bufput(&p->buf, (uchar*)" ", 1) != 1)
 				return 0;
 		}
@@ -822,11 +822,13 @@
 	int i;
 	for(i = 0; i < arraylen(arr); i += 1){
 		o = arrayget(arr, i);
-		if(o->type == Ostr)
+		if(o->type == Ostr){
 			if(!tstr(p, o->str, o->len))
 				return 0;
-		else
-			mattrans(p->TS.Tm, 0 - (o->num.d / 1000), 0, p->TS.Tm);
+		}
+		else {
+			mattrans(p->TS.Tm, 0 - (p->GSactive->Font.size * o->num.d / 1000), 0, p->TS.Tm);
+		}
 	}
 	return flagless(op);
 }
@@ -1373,7 +1375,7 @@
 }
 
 void
-ctminit(Page *p, double *ctm)
+ctminit(Page *p, double *ctm, double w, double h)
 {
 	Object *cropbox;
 	double mx, my;
@@ -1381,17 +1383,26 @@
 	cropbox = pagecropbox(p);
 	mx = arrayget(cropbox, 2)->num.d;
 	my = arrayget(cropbox, 3)->num.d;
-	ctm[0] = 850 / mx;
-	ctm[3] = -1100 / my;
-	ctm[5] = 1100;
+	ctm[0] = w / mx;
+	ctm[3] = 0-h / my;
+	ctm[5] = h;
 }
 
+static void
+tsinit(Page *p)
+{
+	p->TS.TL = 0;
+	p->TS.Tc = 0;
+	p->TS.Tw = 0;
+}
+
 void
 gsinit(Page *p, GS *gs)
 {
 	USED(p);
 	/* todo: actually initialize the full state */
-	ctminit(p, gs->CTM);
+	ctminit(p, gs->CTM, 1100, 1300);
+	tsinit(p);
 	gs->LW = 1.0;
 	gs->LC = CapButt;
 	gs->LJ = JoinMiter;
@@ -1506,7 +1517,7 @@
 	}
 	p->GSactive = p->GS;
 	gsinit(p, p->GS);
-	if((p->image = allocmemimage(Rect(0,0,850,1100), strtochan("r8g8b8"))) == nil){
+	if((p->image = allocmemimage(Rect(0,0,1100,1300), strtochan("r8g8b8"))) == nil){
 		werrstr("unable to allocate image: %r");
 		pagegsclean(p);
 		return 0;