Xworld - Another World interpreter for Rockbox

Co-conspirators: Franklin Wei, Benjamin Brown

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This work is based on:
- Fabien Sanglard's "Fabother World" based on
- Piotr Padkowski's newRaw interpreter which was based on
- Gregory Montoir's reverse engineering of
- Eric Chahi's assembly code

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Progress:

* The plugin runs pretty nicely (with sound!) on most color targets
* Keymaps for color LCD targets are complete
* The manual entry is finished
* Grayscale/monochrome support is NOT PLANNED
  - the game looks horrible in grayscale! :p

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Notes:

* The original game strings were built-in to the executable, and
  were copyrighted and could not be used.
* This port ships with an alternate set of strings by default, but
  can load the "official" strings from a file at runtime.

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To be done (in descending order of importance):

* vertical stride compatibility                          <30% done>
* optimization                                           <10% done>

Change-Id: I3155b0d97c2ac470cb8a2040f40d4139ddcebfa5
Reviewed-on: http://gerrit.rockbox.org/1077
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>

apps/plugins/xworld/xworld.make

@@ -0,0 +1,27 @@
+#             __________               __   ___.
+#   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+#   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+#   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+#   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+#                     \/            \/     \/    \/            \/
+# $Id$
+#
+
+XWORLDSRCDIR := $(APPSDIR)/plugins/xworld
+XWORLDBUILDDIR := $(BUILDDIR)/apps/plugins/xworld
+
+ROCKS += $(XWORLDBUILDDIR)/xworld.rock
+
+XWORLD_SRC := $(call preprocess, $(XWORLDSRCDIR)/SOURCES)
+XWORLD_OBJ := $(call c2obj, $(XWORLD_SRC))
+
+# add source files to OTHER_SRC to get automatic dependencies
+OTHER_SRC += $(XWORLD_SRC)
+
+XWORLDFLAGS = $(filter-out -O%,$(PLUGINFLAGS)) -O2
+
+$(XWORLDBUILDDIR)/xworld.rock: $(XWORLD_OBJ)
+
+$(XWORLDBUILDDIR)/%.o: $(XWORLDSRCDIR)/%.c $(XWORLDSRCDIR)/xworld.make
+	$(SILENT)mkdir -p $(dir $@)
+	$(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) -I$(dir $<) $(XWORLDFLAGS) -c $< -o $@