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Anti-Aliased Fonts support.

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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
This commit is contained in:
Thomas Martitz 2011-03-05 18:36:51 +00:00
parent 396ddd9fd7
commit 9edd6d4ee9
11 changed files with 1939 additions and 27 deletions
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9
tools/Makefile
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@ -13,10 +13,10 @@ LDFLAGS := -g
CLEANALL := scramble descramble iriver sh2d bmp2rb rdf2binary convbdf \
generate_rocklatin mkboot ipod_fw codepages uclpack mi4 gigabeat lngdump \
telechips gigabeats creative hmac-sha1 rbspeexenc mkzenboot mk500boot
telechips gigabeats creative hmac-sha1 rbspeexenc mkzenboot mk500boot convttf
all: scramble descramble sh2d rdf2binary mkboot mkzenboot convbdf codepages \
uclpack rbspeexenc voicefont mk500boot
uclpack rbspeexenc voicefont mk500boot convttf
scramble: scramble.o iriver.o mi4.o gigabeat.o gigabeats.o telechips.o \
iaudio_bl_flash.o creative.o hmac-sha1.o
@ -97,6 +97,11 @@ voicefont: voicefont.c
usb_benchmark: usb_benchmark.c
$(SILENT)$(CC) $(CFLAGS) -lusb $+ -o $@
convttf: convttf.c
$(call PRINTS,CC $(@F))
$(SILENT)$(CC) $(CFLAGS) -lm -std=c99 -O2 -Wall -g $+ -o $@ \
`freetype-config --libs` `freetype-config --cflags`
clean:
@echo "Cleaning tools"
$(SILENT)rm -f $(CLEANALL) $(shell for f in $(CLEANALL) ; do \