Add Unicode support to internal font.

  + Now contains more glpyhs (was previously limited to cp-1252).
  + When a glyph is unavailable, the codepoint is now rendered.
  + Added glyph data file.
  + Added converter to generate the font's .c file from the data.

TODO:

  The generated file is currently checked into the repo, but it
  should be generated as part of the build process, in the
  build-* directory.

  To update the generated source file, first build the converter:

      $ gcc -O2 -Wall framebuffer/convert_font.c -lm \
          -o build-Linux-framebuffer/tools/convert_font

  And then use it to generate the souce file:

      $ build-Linux-framebuffer/tools/convert_font \
         framebuffer/res/fonts/glyph_data \
         framebuffer/GEN_font_internal.c -v

  The converter's usage is:

     convert_font [options] <in_file> <out_file>

  See convert_font --help for more details.

1 files changed, 13 insertions, 12 deletions

diff --git a/framebuffer/font_internal.h b/framebuffer/font_internal.h
index 6b6de2f34..236183ace 100644
--- a/framebuffer/font_internal.h
+++ b/framebuffer/font_internal.h
@@ -21,22 +21,23 @@
 
 struct fb_font_desc {
     const char *name;
-    int width, height;
-    const char *encoding;
-    const uint32_t *data;
+    int width, height, pitch;
 };
 
-extern const struct fb_font_desc font_regular;
-extern const struct fb_font_desc font_italic;
-extern const struct fb_font_desc font_bold;
-extern const struct fb_font_desc font_italic_bold;
+#define FB_FONT_WIDTH		8
+#define FB_FONT_HEIGHT		16
+#define FB_FONT_PITCH		8
 
-extern const struct fb_font_desc* fb_get_font(const plot_font_style_t *fstyle);
+enum fb_font_style {
+	FB_REGULAR	= 0,
+	FB_ITALIC	= (1 << 0),
+	FB_BOLD		= (1 << 1),
+	FB_BOLD_ITALIC	= (FB_ITALIC | FB_BOLD)
+};
+
+enum fb_font_style fb_get_font_style(const plot_font_style_t *fstyle);
 
-extern nserror utf8_to_font_encoding(const struct fb_font_desc* font,
-				       const char *string,
-				       size_t len,
-				       char **result);
+const uint8_t * fb_get_glyph(uint32_t ucs4, enum fb_font_style style);
 
 #endif /* NETSURF_FB_FONT_INTERNAL_H */