From ca42e93774d6695734f515b4b57d8fc7529cde21 Mon Sep 17 00:00:00 2001
From: handa <handa>
Date: Tue, 9 Nov 2004 00:33:50 +0000
Subject: [PATCH] (alt_subst, do_alternate_subst): New variables.
 (update_seq_area): If do_alternate_subst, call
 OTF_drive_gsub_alternate.  Correctly set advance.  Don't
 check g->alternate_set. (AltSubstProc): New function.
 (create_widgets): Create AltSubst widget.

---
 example/otfview.c |   35 +++++++++++++++++------------------
 1 file changed, 17 insertions(+), 18 deletions(-)

diff --git a/example/otfview.c b/example/otfview.c
index af87d38..6d2baf8 100644
--- a/example/otfview.c
+++ b/example/otfview.c
@@ -73,7 +73,7 @@ XtAppContext context;
    | |         idxl[0]     ...    idxl[15]  | |
    | +--------------------------------------+ |
    | +--- render_area (form) ---------------+ |
-   | | clear del bidi                       | |
+   | | clear del bidi alt_subst             | |
    | | +--- raw (box) --------------------+ | |
    | | | raw_label raw_image              | | |
    | | +----------------------------------+ | |
@@ -88,7 +88,7 @@ Widget shell, frame;
 Widget command_area, quit, dump, *charmap;
 Widget navi_area, FIRST, PREV, prev, range, next, NEXT, LAST;
 Widget glyph_area, glyph[128], index_label[8];
-Widget render_area, clear, del, bidi, raw, seq;
+Widget render_area, clear, del, bidi, alt_subst, raw, seq;
 Widget raw_label, raw_image, seq_label, seq_image;
 unsigned long foreground, background;
 
@@ -142,6 +142,7 @@ struct {
 int charmap_index;
 
 int reversed;
+int do_alternate_subst;
 unsigned glyph_width, glyph_height;
 int glyph_x, glyph_y;
 int glyph_index;
@@ -321,7 +322,10 @@ update_seq_area ()
 	  str = get_features (&otf->gsub->FeatureList, &gsub);
 	  if (str)
 	    {
-	      OTF_drive_gsub (otf, &gstring, NULL, NULL, str);
+	      if (do_alternate_subst)
+		OTF_drive_gsub_alternate (otf, &gstring, NULL, NULL, str);
+	      else
+		OTF_drive_gsub (otf, &gstring, NULL, NULL, str);
 	      free (str);
 	    }
 	}
@@ -372,6 +376,7 @@ update_seq_area ()
 	  create_pixmap (gstring.glyphs[i].glyph_id);
 	  if (! bmp->pixmap)
 	    continue;
+	  advance = bmp->advance;
 	}
       switch (g->positioning_type)
 	{
@@ -440,21 +445,6 @@ update_seq_area ()
 	mark = g;
       else
 	base = g, base_width = advance;
-
-      if (g->alternate_set)
-	for (j = 0; j < g->alternate_set->GlyphCount; j++)
-	  {
-	    bmp = bitmap + g->alternate_set->Alternate[j];
-	    if (! bmp->pixmap)
-	      create_pixmap (g->alternate_set->Alternate[j]);
-	    if (! bmp->pixmap)
-	      continue;
-	    XCopyArea (display, bmp->pixmap, seq_pixmap, gc_or,
-		       glyph_x + bmp->x, glyph_y + bmp->y, 
-		       bmp->width, bmp->height,
-		       x + bmp->x + xoff, glyph_y + bmp->y - yoff);
-	    x += bmp->advance;
-	}
     }
   free (gstring.glyphs);
 
@@ -712,6 +702,13 @@ BidiProc (Widget w, XtPointer client_data, XtPointer call_data)
 }
 
 void
+AltSubstProc (Widget w, XtPointer client_data, XtPointer call_data)
+{
+  do_alternate_subst = ! do_alternate_subst;
+  update_seq_area ();
+}
+
+void
 FeatureProc (Widget w, XtPointer client_data, XtPointer call_data)
 {
   FeatureRec *rec = (FeatureRec *) client_data;
@@ -1159,6 +1156,8 @@ create_widgets ()
   XtAddCallback (del, XtNcallback, RenderProc, (XtPointer) -2);
   bidi = XtCreateManagedWidget ("L->R", toggleWidgetClass, w, arg, 0);
   XtAddCallback (bidi, XtNcallback, BidiProc, NULL);
+  alt_subst = XtCreateManagedWidget ("AltSubst", toggleWidgetClass, w, arg, 0);
+  XtAddCallback (alt_subst, XtNcallback, AltSubstProc, NULL);
 
   XtSetArg (arg[4], XtNorientation, XtorientHorizontal);
   XtSetArg (arg[5], XtNborderWidth, 0);
-- 
1.7.10.4