* src/include/font.h (font): New member function

`get_image_generator'.
New variables `unscaled_charwidths' and `image_generator'.

* src/libs/libgroff/font.cpp (font::get_width): Always return the
character's unscaled width if `font::unscaled_charwidths' is set.
(font::get_image_generator): New function.
(font::load_desc): Check the `unscaled_charwidths' and
`image_generator' keywords.

* src/libs/libgroff/fontfile.cpp: Initialize
`font::unscaled_charwidths' and `font::image_generator'.

* font/devhtml/DESC.proto: s/html/unscaled_charwidths/.

* font/devhtml/Makefile.sub (DESC): Set `image_generator' keyword.

* man/groff_font.man: Document `unscaled_charwidths' and
`image_generator'.

* src/preproc/html/pre-html.cpp: Include `device.h'.
(image_gen): New global variable.
(imageList::createPage): Use `image_gen'.
(main): Use `image_generator' keyword.

1 files changed, 20 insertions, 1 deletions

diff --git a/man/groff_font.man b/man/groff_font.man
index 7da71550..b806aac9 100644
--- a/man/groff_font.man
+++ b/man/groff_font.man
@@ -48,7 +48,8 @@ font format.
 The font files for device
 .I name
 are stored in a directory
-.BI dev name.
+.BI dev name\c
+\&.
 .
 There are two types of file: a
 device description file called
@@ -103,6 +104,17 @@ The horizontal resolution is
 machine units.
 .
 .TP
+.BI image_generator\  string
+Needed for
+.B grohtml
+only.
+It specifies the program to generate PNG images from
+PostScript input.
+Under GNU/Linux this is usually
+.I gs
+but under other systems (notably cygwin) it might be set to another name.
+.
+.TP
 .BI paperlength\  n
 The physical vertical dimension of the output medium in machine units.
 .
@@ -276,6 +288,13 @@ for fonts whose point size is
 scaled points.
 .
 .TP
+.B unscaled_charwidths
+Make the font handling module always return unscaled character widths.
+Needed for the
+.B grohtml
+device.
+.
+.TP
 .B use_charnames_in_special
 This command indicates that troff should encode named characters inside
 special commands.