Anti-Aliased Fonts support.

This enables Rockbox to render anti-aliased fonts using an alpha blending method.
The input font bitmaps are 4bit, i.e. 4x larger, but the metadata size stays the same.

A tool, convttf, for converting ttf fonts directly to the Rockbox fnt format is provided.
It has a useful help output, but the parameter that works best is -c1 or -c2 (2 for larger font sizes).

Flyspray: FS#8961
Author: Initial work by Jonas Hurrelmann, further work by Fred Bauer, Andrew Mahone, Teruaki Kawashima and myself.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29523 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/tools.make b/tools/tools.make
index 64a47c53de..c143157dab 100644
--- a/tools/tools.make
+++ b/tools/tools.make
@@ -33,6 +33,11 @@ $(TOOLSDIR)/uclpack: $(TOOLSDIR)/ucl/uclpack.c $(wildcard $(TOOLSDIR)/ucl/src/*.
         $(call PRINTS,CC $(@F))$(HOSTCC) $(TOOLSCFLAGS) -I$(TOOLSDIR)/ucl \
                 -I$(TOOLSDIR)/ucl/include -o $@ $^
 
+$(TOOLSDIR)/convttf: $(TOOLSDIR)/convttf.c
+        $(call PRINTS,CC $(@F))
+        $(SILENT)$(HOSTCC) $(TOOLSFLAGS) -lm -O2 -Wall -g $+ -o $@ \
+                `freetype-config --libs` `freetype-config --cflags`
+
 # implicit rule for simple tools
 $(TOOLSDIR)/%: $(TOOLSDIR)/%.c
         $(call PRINTS,CC $(subst $(ROOTDIR)/,,$@))