Make IRC export work with more clients

1 files changed, 23 insertions, 4 deletions

diff --git a/autistdraw.c b/autistdraw.c
index 8e85285..31d8c0b 100644
--- a/autistdraw.c
+++ b/autistdraw.c
@@ -757,17 +757,36 @@ export_irc (app_context_t *app)
 	size_t x, y, w, h;
 	find_data_bounding_rect (app, &x, &y, &w, &h);
 
+	// This is tricky and needs to be tested with major IRC clients.  Currently
+	// works with: weechat 1.0, xchat 2.8.8, freenode's qwebirc.
+
+	// We cannot use the same non-space character for transparent and opaque
+	// pixels because many clients don't understand the transparent 99 colour
+	// that is needed for the foreground of transparent pixels.  Therefore it
+	// is not possible to display correctly using non-monospace fonts.
+
 	for (size_t row = 0; row < h; row++)
 	{
-		int color = MIRC_NONE;
+		// qwebirc is retarded and in some cases it reduces spaces, misaligning
+		// the picture.  Appending two spaces after the attribute reset and
+		// rendering opaque pixels as something different from a space seems
+		// to prevent that behaviour.
+		int color = MIRC_TRANSPARENT;
+		fprintf (fp, "\x0f  ");
+
 		for (size_t column = 0; column < w; column++)
 		{
 			int new_color = color_to_mirc
 				(BITMAP_PIXEL (app, x + column, y + row));
 			if (color != new_color)
-				fprintf (fp, "\x03%02d,%02d", new_color, new_color);
-			color = new_color;
-			fputc ('_', fp);
+			{
+				color = new_color;
+				if (color == MIRC_TRANSPARENT)
+					fprintf (fp, "\x0f");
+				else
+					fprintf (fp, "\x03%02d,%02d", color, color);
+			}
+			fputc ("# "[color == MIRC_TRANSPARENT], fp);
 		}
 		fputc ('\n', fp);
 	}