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>

1 files changed, 44 insertions, 0 deletions

diff --git a/apps/plugins/xworld/intern.h b/apps/plugins/xworld/intern.h
new file mode 100644
index 0000000000..3355f28eb1
--- /dev/null
+++ b/apps/plugins/xworld/intern.h
@@ -0,0 +1,44 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2014 Franklin Wei, Benjamin Brown
+ * Copyright (C) 2004 Gregory Montoir
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#ifndef __INTERN_H__
+#define __INTERN_H__
+
+#include "plugin.h"
+#include "string.h"
+#include "awendian.h"
+#include "util.h"
+
+#define assert(c) (c?(void)0:error("Assertion failed line %d, file %s", __LINE__, __FILE__))
+
+struct Ptr {
+    uint8_t* pc;
+};
+
+uint8_t scriptPtr_fetchByte(struct Ptr* p) ICODE_ATTR;
+uint16_t scriptPtr_fetchWord(struct Ptr* p) ICODE_ATTR;
+
+struct Point {
+    int16_t x, y;
+};
+
+#endif