From f34df34682fa6451d774aaf83214189f53635ec6 Mon Sep 17 00:00:00 2001
From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Tue, 15 Oct 2002 00:22:48 +0000
Subject: [PATCH] Support for line attributes: ESC #3, #4 and #6 for
 double-width and double-height text.

git-svn-id: svn://svn.tartarus.org/sgt/putty@2054 cda61777-01e9-0310-a592-d414129be87e
---
 unix/pterm.c | 46 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/unix/pterm.c b/unix/pterm.c
index c612fd3b..e6446a03 100644
--- a/unix/pterm.c
+++ b/unix/pterm.c
@@ -281,7 +281,6 @@ gint key_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
 
 	/*
 	 * NYI:
-	 *  - nethack mode
 	 *  - alt+numpad
 	 *  - Compose key (!!! requires Unicode faff before even trying)
 	 */
@@ -1047,7 +1046,6 @@ void do_text(Context ctx, int x, int y, char *text, int len,
     /*
      * NYI:
      *  - Unicode, code pages, and ATTR_WIDE for CJK support.
-     *  - LATTR_* (ESC # 4 double-width and double-height stuff)
      *  - cursor shapes other than block
      *  - shadow bolding
      */
@@ -1068,6 +1066,12 @@ void do_text(Context ctx, int x, int y, char *text, int len,
 	nbg = NCOLOURS-1;
     }
 
+    if (lattr != LATTR_NORM) {
+	if (x*2 >= cols)
+	    return;
+	x *= 2;
+    }
+
     gdk_gc_set_foreground(gc, &inst->cols[nbg]);
     gdk_draw_rectangle(inst->pixmap, gc, 1,
 		       x*inst->font_width+cfg.window_border,
@@ -1090,6 +1094,44 @@ void do_text(Context ctx, int x, int y, char *text, int len,
 		      y*inst->font_height + uheight + cfg.window_border);
     }
 
+    if (lattr != LATTR_NORM) {
+	/*
+	 * I can't find any plausible StretchBlt equivalent in the
+	 * X server, so I'm going to do this the slow and painful
+	 * way. This will involve repeated calls to
+	 * gdk_draw_pixmap() to stretch the text horizontally. It's
+	 * O(N^2) in time and O(N) in network bandwidth, but you
+	 * try thinking of a better way. :-(
+	 */
+	int i;
+	for (i = 0; i < len * inst->font_width; i++) {
+	    gdk_draw_pixmap(inst->pixmap, gc, inst->pixmap,
+			    x*inst->font_width+cfg.window_border + 2*i,
+			    y*inst->font_height+cfg.window_border,
+			    x*inst->font_width+cfg.window_border + 2*i+1,
+			    y*inst->font_height+cfg.window_border,
+			    len * inst->font_width - i, inst->font_height);
+	}
+	len *= 2;
+	if (lattr != LATTR_WIDE) {
+	    int dt, db;
+	    /* Now stretch vertically, in the same way. */
+	    if (lattr == LATTR_BOT)
+		dt = 0, db = 1;
+	    else
+		dt = 1, db = 0;
+	    for (i = 0; i < inst->font_height; i+=2) {
+		gdk_draw_pixmap(inst->pixmap, gc, inst->pixmap,
+				x*inst->font_width+cfg.window_border,
+				y*inst->font_height+cfg.window_border+dt*i+db,
+				x*inst->font_width+cfg.window_border,
+				y*inst->font_height+cfg.window_border+dt*(i+1),
+				len * inst->font_width, inst->font_height-i-1);
+	    }
+	}
+	len *= 2;
+    }
+
     gdk_draw_pixmap(inst->area->window, gc, inst->pixmap,
 		    x*inst->font_width+cfg.window_border,
 		    y*inst->font_height+cfg.window_border,
-- 
2.11.0