From ae01bf90ceea33c114d2eaff4beaed7a53987ee5 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Fri, 13 Feb 2004 10:33:21 +0000
Subject: 	* (Render): Rendering of UTF8 strings is now (hopefully) 
   correct in GL. 	* (PointToChar): Fixed a bug related to UTF char
 offset versus 	  byte offset.         * (ComputeTransfoAndOrigin): Rounded
 the origin on the integer 	  lattice to get rid of display uglyness on
 GL.

---
 generic/Text.c | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

(limited to 'generic/Text.c')

diff --git a/generic/Text.c b/generic/Text.c
index 7a2b1f8..c81d1b7 100644
--- a/generic/Text.c
+++ b/generic/Text.c
@@ -413,7 +413,8 @@ ComputeTransfoAndOrigin(ZnItem	  item,
     ZnTransformPoint(&inv, origin, origin);
     ZnAnchor2Origin(origin, (ZnReal) text->max_width,
 		    (ZnReal) text->height, text->anchor, origin);
-
+    origin->x = ZnNearestInt(origin->x);
+    origin->y = ZnNearestInt(origin->y);
     /*
      * The relevant transform in case of an attachment is the item
      * transform alone. This is case of local coordinate space where
@@ -425,6 +426,9 @@ ComputeTransfoAndOrigin(ZnItem	  item,
   else {
     ZnAnchor2Origin(&text->pos, (ZnReal) text->max_width,
 		    (ZnReal) text->height, text->anchor, origin);
+    origin->x = ZnNearestInt(origin->x);
+    origin->y = ZnNearestInt(origin->y);
+
     return item->wi->current_transfo;
   }
 }
@@ -680,6 +684,7 @@ ComputeCoordinates(ZnItem	item,
     text->poly[2].x = text->poly[3].x;
     text->poly[2].y = text->poly[0].y;
     ZnTransformPoints(transfo, text->poly, text->poly, 4);       
+
     /*
      * Add to the bounding box.
      */
@@ -1101,6 +1106,9 @@ Render(ZnItem	item)
   int		underline_thickness, underline_pos=0, overstrike_pos=0;
   int		sel_first_line=-1, sel_last_line=-1, cursor_line=-1;
   int		sel_start_offset=0, sel_stop_offset=0, cursor_offset=0;
+#ifndef PTK
+  Tcl_Encoding	enc;
+#endif
 
   if (!text->text_info) {
     return;
@@ -1111,6 +1119,9 @@ Render(ZnItem	item)
       return;
     }
   }
+#ifndef PTK
+  enc = ZnTexFontEncoding(text->tfi);
+#endif
 
 #ifdef GL_LIST
   if (!item->gl_list) {
@@ -1264,14 +1275,16 @@ Render(ZnItem	item)
        */
       {
 	char	*buf;
-	int	written;
+	int	result, written;
 
 	buf = ZnMalloc(lines_ptr->num_bytes+1);
-	Tcl_UtfToExternal(wi->interp, NULL,
-			  lines_ptr->start, lines_ptr->num_bytes,
-			  TCL_ENCODING_START|TCL_ENCODING_END,
-			  NULL, buf, lines_ptr->num_bytes+1, NULL,
-			  &written, NULL);
+	if ((result = Tcl_UtfToExternal(wi->interp, enc,
+				       lines_ptr->start, lines_ptr->num_bytes,
+				       TCL_ENCODING_START|TCL_ENCODING_END,
+				       NULL, buf, lines_ptr->num_bytes+1, NULL,
+				       &written, NULL)) != TCL_OK) {
+	  printf("Failed to convert the string: %d\n", result);
+	}
 	ZnRenderString(text->tfi, buf, written);
 	ZnFree(buf);
       }
@@ -1381,8 +1394,8 @@ Pick(ZnItem	item,
  **********************************************************************************
  */
 static void
-PostScript(ZnItem		item __unused,
-	   ZnPostScriptInfo	ps_info __unused)
+PostScript(ZnItem	item __unused,
+	   ZnBool	prepass __unused)
 {
 }
 
@@ -1544,7 +1557,7 @@ PointToChar(TextItem	text,
       n = Tk_MeasureChars(text->font, ti->start, (int) ti->num_bytes,
 			  p.x + 2 - (int) ti->origin_x, TK_PARTIAL_OK,
 			  &dummy);
-      byte_index = (ti->start + n - 1) - text->text;
+      byte_index = Tcl_UtfPrev(ti->start + n, ti->start) - text->text;
       break;
     }
   }
-- 
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