first version - missing lam alef ligature

15 files changed, 1413 insertions, 1 deletions

diff --git a/README.md b/README.md
index bd9a4f9..fafbba5 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,37 @@
 arabtype
 ========
 
-a small and simple implementation that transform isolated arabic utf8 character strings into contextual forms.
\ No newline at end of file
+a small and simple implementation that transform isolated arabic utf8 character
+strings into contextual forms.
+
+LICENSE:
+========
+The code is released under LGPL version 3 with the permission to statically link
+your program with the code, provided that you send me your bug fixes for any bug
+you may find in the provided code.
+I intend to release the source code later under a more permessive license so your
+patch should be under an MIT license in order to make that possible.
+
+-----------------------------------------------------------------------
+The utf8.c file is under the following license:
+
+Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+
+See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md~ b/README.md~
new file mode 100644
index 0000000..fafbba5
--- /dev/null
+++ b/README.md~
@@ -0,0 +1,37 @@
+arabtype
+========
+
+a small and simple implementation that transform isolated arabic utf8 character
+strings into contextual forms.
+
+LICENSE:
+========
+The code is released under LGPL version 3 with the permission to statically link
+your program with the code, provided that you send me your bug fixes for any bug
+you may find in the provided code.
+I intend to release the source code later under a more permessive license so your
+patch should be under an MIT license in order to make that possible.
+
+-----------------------------------------------------------------------
+The utf8.c file is under the following license:
+
+Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+
+See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/ae_Tholoth.ttf b/ae_Tholoth.ttf
new file mode 100644
index 0000000..74df449
--- /dev/null
+++ b/ae_Tholoth.ttf
diff --git a/arabic_string_layout.pro b/arabic_string_layout.pro
new file mode 100644
index 0000000..979b395
--- /dev/null
+++ b/arabic_string_layout.pro
@@ -0,0 +1,30 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2012-09-21T20:12:51
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = arabic_string_layout
+TEMPLATE = app
+
+QMAKE_CFLAGS_DEBUG += -std=c99
+QMAKE_CFLAGS_RELEASE += -std=c99
+
+CONFIG += link_pkgconfig
+
+PKGCONFIG	+= freetype2
+
+SOURCES += main.cpp\
+	mainwindow.cpp \
+    utf8.c \
+    arabtype.c
+
+HEADERS  += mainwindow.h \
+    utf8.h \
+    arabtype.h
+
+FORMS    += mainwindow.ui
diff --git a/arabic_test.txt b/arabic_test.txt
new file mode 100644
index 0000000..a5d431d
--- /dev/null
+++ b/arabic_test.txt
@@ -0,0 +1 @@
+اعطني الناي و غني فالغناﺀ سر الوجود    فأنين الناي يبقئ بعد ان يفنئ الوجود 
diff --git a/arabtype.c b/arabtype.c
new file mode 100644
index 0000000..d9ac78d
--- /dev/null
+++ b/arabtype.c
@@ -0,0 +1,96 @@
+/*
+** Arabtype Copyright 2012-2013(c) Wael El Oraiby. All Rights Reserved
+** see README.md file for license
+*/
+
+#include <stdbool.h>
+#include "utf8.h"
+#include "arabtype.h"
+
+#define ARABIC_LETTER_START		0x621
+#define ARABIC_LETTER_END		0x64A
+
+#define ISOLATED	0
+#define ENDING		1
+#define INITIAL		2
+#define MEDIAL		3
+
+//
+// 0: isolated form
+// 1: ending form
+// 2: beginning form	(if 0, it's a cutting type)
+// 3: middle form
+//
+typedef uint32_t char_form[4];
+
+char_form	arabic_forms_b[]	=
+{
+	{0xFE80, 0xFE80, 0, 0},			// hamza	(0)
+	{0xFE81, 0xFE82, 0, 0},			// 2alif madda	(1)
+	{0xFE83, 0xFE84, 0, 0},			// 2alif hamza	(2)
+	{0xFE85, 0xFE86, 0, 0},			// waw hamza	(3)
+	{0xFE87, 0xFE88, 0, 0},			// 2alif hamza maksoura	(4)
+	{0xFE89, 0xFE8A, 0xFE8B, 0xFE8C},	// 2alif maqsoura hamza	(5)
+	{0xFE8D, 0xFE8E, 0, 0},			// 2alif	(6)
+	{0xFE8F, 0xFE90, 0xFE91, 0xFE92},	// ba2		(7)
+	{0xFE93, 0xFE94, 0, 0},			// ta2 marbouta	(8)
+	{0xFE95, 0xFE96, 0xFE97, 0xFE98},	// ta2		(9)
+	{0xFE99, 0xFE9A, 0xFE9B, 0xFE9C},	// tha2		(10)
+	{0xFE9D, 0xFE9E, 0xFE9F, 0xFEA0},	// jim		(11)
+	{0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4},	// 7a2		(12)
+	{0xFEA5, 0xFEA6, 0xFEA7, 0xFEA8},	// kha2		(13)
+	{0xFEA9, 0xFEAA, 0, 0},			// dal		(14)
+	{0xFEAB, 0xFEAC, 0, 0},			// dhal		(15)
+	{0xFEAD, 0xFEAE, 0, 0},			// ra2		(16)
+	{0xFEAF, 0xFEB0, 0, 0},			// zayn		(17)
+	{0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4},	// syn		(18)
+	{0xFEB5, 0xFEB6, 0xFEB7, 0xFEB8},	// shin		(19)
+	{0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC},	// sad		(20)
+	{0xFEBD, 0xFEBE, 0xFEBF, 0xFEC0},	// dad		(21)
+	{0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4},	// tah		(22)
+	{0xFEC5, 0xFEC6, 0xFEC7, 0xFEC8},	// thah		(23)
+	{0xFEC9, 0xFECA, 0xFECB, 0xFECC},	// 3ayn		(24)
+	{0xFECD, 0xFECE, 0xFECF, 0xFED0},	// ghayn	(25)
+	{0, 0, 0, 0},				//		(26)
+	{0, 0, 0, 0},				//		(27)
+	{0, 0, 0, 0},				//		(28)
+	{0, 0, 0, 0},				//		(29)
+	{0, 0, 0, 0},				//		(30)
+	{0x640, 0x640, 0x640, 0x640},		// wasla	(31)
+	{0xFED1, 0xFED2, 0xFED3, 0xFED4},	// fa2		(32)
+	{0xFED5, 0xFED6, 0xFED7, 0xFED8},	// qaf		(33)
+	{0xFED9, 0xFEDA, 0xFEDB, 0xFEDC},	// kaf		(34)
+	{0xFEDD, 0xFEDE, 0xFEDF, 0xFEE0},	// lam		(35)
+	{0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4},	// mim		(36)
+	{0xFEE5, 0xFEE6, 0xFEE7, 0xFEE8},	// noon		(37)
+	{0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC},	// ha2		(38)
+	{0xFEED, 0xFEEE, 0, 0},			// waw		(39)
+	{0xFEFF, 0xFEF0, 0, 0},			// 2alif maksoura	(40)
+	{0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4}	// ya2		(41)
+};
+
+bool is_arabic_letter(uint32_t cp)
+{
+	if( cp >= ARABIC_LETTER_START && cp <=  ARABIC_LETTER_END )
+		return true;
+	return false;
+}
+
+bool is_linking_type(uint32_t cp)
+{
+	if( cp >= ARABIC_LETTER_START && cp <=  ARABIC_LETTER_END )
+		if( arabic_forms_b[cp - ARABIC_LETTER_START][INITIAL] || arabic_forms_b[cp - ARABIC_LETTER_START][MEDIAL] )
+			return true;
+	return false;
+}
+
+
+uint32_t get_presentation_form_b(uint32_t prev, uint32_t next, uint32_t cp)
+{
+	if( !is_arabic_letter(cp) )
+		return cp;	/* not an Arabic letter */
+
+	uint32_t index	= ((is_arabic_letter(next) & is_linking_type(cp)) << 1) | is_linking_type(prev);
+
+	return arabic_forms_b[cp -  ARABIC_LETTER_START][index];
+}
diff --git a/arabtype.h b/arabtype.h
new file mode 100644
index 0000000..b79ee3f
--- /dev/null
+++ b/arabtype.h
@@ -0,0 +1,17 @@
+/*
+** Arabtype Copyright 2012-2013(c) Wael El Oraiby. All Rights Reserved
+** see README.md file for license
+*/
+#ifndef ARABTYPE_H
+#define ARABTYPE_H
+#ifdef __cplusplus
+extern "C" {
+#endif	// __cplusplus
+
+uint32_t get_presentation_form_b(uint32_t prev, uint32_t next, uint32_t cp);
+
+#ifdef __cplusplus
+}
+#endif	// __cplusplus
+
+#endif // ARABTYPE_H
diff --git a/gpl-3.0.txt b/gpl-3.0.txt
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/gpl-3.0.txt
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+
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+any patent claim is infringed by making, using, selling, offering for
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+
+  A patent license is "discriminatory" if it does not include within
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+conditioned on the non-exercise of one or more of the rights that are
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+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+
+  14. Revised Versions of this License.
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+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
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+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
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+
+  Later license versions may give you additional or different
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
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+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/lgpl-3.0.txt b/lgpl-3.0.txt
new file mode 100644
index 0000000..65c5ca8
--- /dev/null
+++ b/lgpl-3.0.txt
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..24a397b
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,11 @@
+#include <QApplication>
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+	QApplication a(argc, argv);
+	MainWindow w;
+	w.show();
+	
+	return a.exec();
+}
diff --git a/mainwindow.cpp b/mainwindow.cpp
new file mode 100644
index 0000000..ea3a91f
--- /dev/null
+++ b/mainwindow.cpp
@@ -0,0 +1,172 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+#include <QtGui>
+#include <cassert>
+#include <iostream>
+#include <vector>
+#include <string>
+#include <fstream>
+
+#include "utf8.h"
+#include "arabtype.h"
+
+FT_Library MainWindow::ftlib__	= NULL;
+
+
+
+uint32_t	get_arabic_form(const std::vector<uint32_t>& code_point, uint32_t idx)
+{
+	uint	ch	= code_point[idx];
+	uint	prev	= 0;
+	uint	next	= 0;
+
+	if( idx )
+		prev	= code_point[idx - 1];
+	if( idx < code_point.size() - 1 )
+		next	= code_point[idx + 1];
+
+	return get_presentation_form_b(prev, next, ch);
+}
+
+std::vector<uint32_t> decode(const std::vector<uint8_t>& in)
+{
+	std::vector<uint>	ret;
+	uint codep	= 0;
+	uint state	= 0;
+
+	for( size_t i = 0; i < in.size(); ++i )
+	{
+		if( decode(&state, &codep, in[i]) == UTF8_ACCEPT )
+			ret.push_back(codep);
+	}
+	if( state != UTF8_ACCEPT )
+		std::cout << "The string is not well-formed" << std::endl;
+
+	return ret;
+}
+
+MainWindow::MainWindow(QWidget *parent) :
+	QMainWindow(parent),
+	ui__(new Ui::MainWindow)
+{
+	ui__->setupUi(this);
+
+	std::ifstream	ifs("arabic_test.txt");
+	assert( ifs.is_open() );
+	std::vector<uchar>	arabic_string;
+
+	while( ifs.good() )
+	{
+		uchar ch = ifs.get();
+		if( ifs.good() )
+			arabic_string.push_back(ch);
+	}
+
+	std::cout << "size: " << arabic_string.size() << std::endl;
+	ifs.close();
+
+	std::vector<uint> arabic_cp	= decode(arabic_string);
+
+	for( size_t i = 0; i < arabic_cp.size(); ++i )
+		std::cout << "0x" << std::hex << arabic_cp[i] << std::endl;
+
+	std::cout << std::dec;
+
+	if( !ftlib__ )
+	{
+		FT_Error	error = FT_Init_FreeType(&ftlib__);
+		assert( !error && "Error loading freetype" );
+	}
+
+	// load the font
+	FT_Face		face;
+	FT_Error	error;
+
+	error		= FT_New_Face(ftlib__, "ae_Tholoth.ttf", 0, &face);
+	assert( !error && "unable to load font file" );
+
+	// set font size
+	error		= FT_Set_Pixel_Sizes(face, 0, 24);
+	assert( !error && "Error setting font size" );
+
+	// setup glyph
+	// render chars
+	FT_GlyphSlot	slot		= face->glyph;
+
+	FT_Int32	load_flags	= FT_LOAD_DEFAULT | FT_LOAD_FORCE_AUTOHINT;
+	FT_Render_Mode	render_flags	= FT_RENDER_MODE_NORMAL;
+
+
+	data__	= new uchar[1024 * 256 * 4];
+	memset(data__, 0, 1024 * 256 * 4);
+	int	col	= 1024 - 1;
+	int	line	= 100;
+	QImage	img(data__, 1024, 256, QImage::Format_RGB32);
+	// render the arabic glyphs
+	for( size_t idx = 0; idx < arabic_cp.size(); ++idx )
+	{
+		uint ch	= get_arabic_form(arabic_cp, idx);
+		if( ch == 0xA || ch == 0xC )
+			continue;
+
+		int glyph_index	= FT_Get_Char_Index(face, ch);
+		assert( glyph_index && "invalid character" );
+
+		error	= FT_Load_Glyph(face, glyph_index, load_flags);
+		assert( !error && "couldn't load glyph" );
+
+		error = FT_Render_Glyph(slot, render_flags);
+		assert( !error && "couldn't render glyph" );
+
+		FT_Glyph glyph;
+		FT_Get_Glyph(slot, &glyph);
+
+		FT_BBox	box;
+		FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_TRUNCATE, &box);
+
+		int	temp_col	= col - (slot->advance.x >> 6);//slot->bitmap.width;
+
+		for( int y = 0; y < slot->bitmap.rows; y++ )
+		{
+			for( int x = 0; x < slot->bitmap.width; x++ )
+			{
+				uchar	co	= slot->bitmap.buffer[x + y * slot->bitmap.pitch];
+				if( co && x + temp_col < 1024 && x + temp_col >= 0 )
+				{
+					uint rgb = img.pixel(x + temp_col + slot->bitmap_left, y - slot->bitmap_top + line);
+
+					img.setPixel(x + temp_col + slot->bitmap_left, y - slot->bitmap_top + line, rgb | qRgb(co, co, co));
+				}
+
+				//std::cout << uint(co) << " ";
+			}
+			//std::cout << std::endl;
+		}
+
+		//std::cout << std::endl;
+
+		col -= slot->advance.x >> 6;
+
+		FT_Done_Glyph(glyph);
+	}
+
+
+	for( int i = 0; i < 1024; ++i )
+		//data__[i + 128 * 512 * 4 + 1]	= 0xFF;
+		img.setPixel(i, 128, 0xFF000000);
+	QPixmap	pixmap = QPixmap::fromImage(img);
+	ui__->label->setPixmap(pixmap);
+
+	FT_Done_Face(face);
+}
+
+MainWindow::~MainWindow()
+{
+	FT_Done_FreeType(ftlib__);
+	delete ui__;
+	delete data__;
+}
+
+void MainWindow::paintEvent ( QPaintEvent * event )
+{
+}
diff --git a/mainwindow.h b/mainwindow.h
new file mode 100644
index 0000000..0b29001
--- /dev/null
+++ b/mainwindow.h
@@ -0,0 +1,31 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_GLYPH_H
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+	Q_OBJECT
+
+public:
+	explicit MainWindow(QWidget *parent = 0);
+	~MainWindow();
+
+protected:
+	virtual void		paintEvent(QPaintEvent* event);
+
+private:
+	Ui::MainWindow*		ui__;
+	uchar*			data__;
+	static FT_Library	ftlib__;
+};
+
+#endif // MAINWINDOW_H
diff --git a/mainwindow.ui b/mainwindow.ui
new file mode 100644
index 0000000..062f947
--- /dev/null
+++ b/mainwindow.ui
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QLabel" name="label">
+      <property name="text">
+       <string/>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>400</width>
+     <height>23</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QToolBar" name="mainToolBar">
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/utf8.c b/utf8.c
new file mode 100644
index 0000000..494396d
--- /dev/null
+++ b/utf8.c
@@ -0,0 +1,53 @@
+/*
+Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+
+See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "utf8.h"
+
+static const uint8_t utf8d[] = {
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 00..1f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 20..3f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 40..5f
+	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 60..7f
+	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, // 80..9f
+	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, // a0..bf
+	8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, // c0..df
+	0xa,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x4,0x3,0x3, // e0..ef
+	0xb,0x6,0x6,0x6,0x5,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8, // f0..ff
+	0x0,0x1,0x2,0x3,0x5,0x8,0x7,0x1,0x1,0x1,0x4,0x6,0x1,0x1,0x1,0x1, // s0..s0
+	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,0,1,0,1,1,1,1,1,1, // s1..s2
+	1,2,1,1,1,1,1,2,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1, // s3..s4
+	1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,3,1,3,1,1,1,1,1,1, // s5..s6
+	1,3,1,1,1,1,1,3,1,3,1,1,1,1,1,1,1,3,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // s7..s8
+};
+
+uint32_t decode(uint32_t* state, uint32_t* codep, uint32_t byte)
+{
+	uint8_t type = utf8d[byte];
+
+	*codep = (*state != UTF8_ACCEPT) ?
+		(byte & 0x3fu) | (*codep << 6) :
+		(0xff >> type) & (byte);
+
+	*state = utf8d[256 + *state*16 + type];
+	return *state;
+}
diff --git a/utf8.h b/utf8.h
new file mode 100644
index 0000000..fba4509
--- /dev/null
+++ b/utf8.h
@@ -0,0 +1,42 @@
+#ifndef UTF8_H
+#define UTF8_H
+
+/*
+Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+
+See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif	// __cplusplus
+
+#define UTF8_ACCEPT 0
+#define UTF8_REJECT 1
+
+uint32_t decode(uint32_t* state, uint32_t* codep, uint32_t byte);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // UTF8_H