Working on TCC...

25 files changed, 3383 insertions, 0 deletions

diff --git a/Software/External_Repositories/ZBar/bin/libMagickCore-2.dll b/Software/External_Repositories/ZBar/bin/libMagickCore-2.dll
new file mode 100644
index 000000000..fbb1fcfc5
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libMagickCore-2.dll
diff --git a/Software/External_Repositories/ZBar/bin/libMagickWand-2.dll b/Software/External_Repositories/ZBar/bin/libMagickWand-2.dll
new file mode 100644
index 000000000..3e9a2cbf8
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libMagickWand-2.dll
diff --git a/Software/External_Repositories/ZBar/bin/libiconv-2.dll b/Software/External_Repositories/ZBar/bin/libiconv-2.dll
new file mode 100644
index 000000000..f3368973d
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libiconv-2.dll
diff --git a/Software/External_Repositories/ZBar/bin/libjpeg-7.dll b/Software/External_Repositories/ZBar/bin/libjpeg-7.dll
new file mode 100644
index 000000000..2cf6738b6
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libjpeg-7.dll
diff --git a/Software/External_Repositories/ZBar/bin/libpng12-0.dll b/Software/External_Repositories/ZBar/bin/libpng12-0.dll
new file mode 100644
index 000000000..35e293002
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libpng12-0.dll
diff --git a/Software/External_Repositories/ZBar/bin/libtiff-3.dll b/Software/External_Repositories/ZBar/bin/libtiff-3.dll
new file mode 100644
index 000000000..82706f644
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libtiff-3.dll
diff --git a/Software/External_Repositories/ZBar/bin/libxml2-2.dll b/Software/External_Repositories/ZBar/bin/libxml2-2.dll
new file mode 100644
index 000000000..3ef041fcf
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libxml2-2.dll
diff --git a/Software/External_Repositories/ZBar/bin/libzbar-0.dll b/Software/External_Repositories/ZBar/bin/libzbar-0.dll
new file mode 100644
index 000000000..fbbbd2328
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/libzbar-0.dll
diff --git a/Software/External_Repositories/ZBar/bin/zbarcam.bat b/Software/External_Repositories/ZBar/bin/zbarcam.bat
new file mode 100644
index 000000000..acefe7b69
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/zbarcam.bat
@@ -0,0 +1,9 @@
+@set PATH=%PATH%;C:\Program Files (x86)\ZBar\bin
+@echo This is the zbarcam output window.
+@echo Hold a bar code in front of the camera (make sure it's in focus!)
+@echo and decoded results will appear below.
+@echo.
+@echo Initializing camera, please wait...
+@echo.
+@zbarcam.exe --prescale=640x480
+@if errorlevel 1 pause
diff --git a/Software/External_Repositories/ZBar/bin/zbarcam.exe b/Software/External_Repositories/ZBar/bin/zbarcam.exe
new file mode 100644
index 000000000..d2d2a06e8
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/zbarcam.exe
diff --git a/Software/External_Repositories/ZBar/bin/zbarimg.exe b/Software/External_Repositories/ZBar/bin/zbarimg.exe
new file mode 100644
index 000000000..179494326
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/zbarimg.exe
diff --git a/Software/External_Repositories/ZBar/bin/zlib1.dll b/Software/External_Repositories/ZBar/bin/zlib1.dll
new file mode 100644
index 000000000..9752c129a
--- /dev/null
+++ b/Software/External_Repositories/ZBar/bin/zlib1.dll
diff --git a/Software/External_Repositories/ZBar/include/zbar.h b/Software/External_Repositories/ZBar/include/zbar.h
new file mode 100644
index 000000000..0ab1d6246
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar.h
@@ -0,0 +1,1312 @@
+/*------------------------------------------------------------------------
+ *  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+ *
+ *  This file is part of the ZBar Bar Code Reader.
+ *
+ *  The ZBar Bar Code Reader is free software; you can redistribute it
+ *  and/or modify it under the terms of the GNU Lesser Public License as
+ *  published by the Free Software Foundation; either version 2.1 of
+ *  the License, or (at your option) any later version.
+ *
+ *  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser Public License
+ *  along with the ZBar Bar Code Reader; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ *  Boston, MA  02110-1301  USA
+ *
+ *  http://sourceforge.net/projects/zbar
+ *------------------------------------------------------------------------*/
+#ifndef _ZBAR_H_
+#define _ZBAR_H_
+
+/** @file
+ * ZBar Barcode Reader C API definition
+ */
+
+/** @mainpage
+ *
+ * interface to the barcode reader is available at several levels.
+ * most applications will want to use the high-level interfaces:
+ *
+ * @section high-level High-Level Interfaces
+ *
+ * these interfaces wrap all library functionality into an easy-to-use
+ * package for a specific toolkit:
+ * - the "GTK+ 2.x widget" may be used with GTK GUI applications.  a
+ *   Python wrapper is included for PyGtk
+ * - the @ref zbar::QZBar "Qt4 widget" may be used with Qt GUI
+ *   applications
+ * - the Processor interface (in @ref c-processor "C" or @ref
+ *   zbar::Processor "C++") adds a scanning window to an application
+ *   with no GUI.
+ *
+ * @section mid-level Intermediate Interfaces
+ *
+ * building blocks used to construct high-level interfaces:
+ * - the ImageScanner (in @ref c-imagescanner "C" or @ref
+ *   zbar::ImageScanner "C++") looks for barcodes in a library defined
+ *   image object
+ * - the Window abstraction (in @ref c-window "C" or @ref
+ *   zbar::Window "C++") sinks library images, displaying them on the
+ *   platform display
+ * - the Video abstraction (in @ref c-video "C" or @ref zbar::Video
+ *   "C++") sources library images from a video device
+ *
+ * @section low-level Low-Level Interfaces
+ *
+ * direct interaction with barcode scanning and decoding:
+ * - the Scanner (in @ref c-scanner "C" or @ref zbar::Scanner "C++")
+ *   looks for barcodes in a linear intensity sample stream
+ * - the Decoder (in @ref c-decoder "C" or @ref zbar::Decoder "C++")
+ *   extracts barcodes from a stream of bar and space widths
+ */
+
+#ifdef __cplusplus
+
+/** C++ namespace for library interfaces */
+namespace zbar {
+    extern "C" {
+#endif
+
+
+/** @name Global library interfaces */
+/*@{*/
+
+/** "color" of element: bar or space. */
+typedef enum zbar_color_e {
+    ZBAR_SPACE = 0,    /**< light area or space between bars */
+    ZBAR_BAR = 1,      /**< dark area or colored bar segment */
+} zbar_color_t;
+
+/** decoded symbol type. */
+typedef enum zbar_symbol_type_e {
+    ZBAR_NONE        =      0,  /**< no symbol decoded */
+    ZBAR_PARTIAL     =      1,  /**< intermediate status */
+    ZBAR_EAN8        =      8,  /**< EAN-8 */
+    ZBAR_UPCE        =      9,  /**< UPC-E */
+    ZBAR_ISBN10      =     10,  /**< ISBN-10 (from EAN-13). @since 0.4 */
+    ZBAR_UPCA        =     12,  /**< UPC-A */
+    ZBAR_EAN13       =     13,  /**< EAN-13 */
+    ZBAR_ISBN13      =     14,  /**< ISBN-13 (from EAN-13). @since 0.4 */
+    ZBAR_I25         =     25,  /**< Interleaved 2 of 5. @since 0.4 */
+    ZBAR_CODE39      =     39,  /**< Code 39. @since 0.4 */
+    ZBAR_PDF417      =     57,  /**< PDF417. @since 0.6 */
+    ZBAR_QRCODE      =     64,  /**< QR Code. @since 0.10 */
+    ZBAR_CODE128     =    128,  /**< Code 128 */
+    ZBAR_SYMBOL      = 0x00ff,  /**< mask for base symbol type */
+    ZBAR_ADDON2      = 0x0200,  /**< 2-digit add-on flag */
+    ZBAR_ADDON5      = 0x0500,  /**< 5-digit add-on flag */
+    ZBAR_ADDON       = 0x0700,  /**< add-on flag mask */
+} zbar_symbol_type_t;
+
+/** error codes. */
+typedef enum zbar_error_e {
+    ZBAR_OK = 0,                /**< no error */
+    ZBAR_ERR_NOMEM,             /**< out of memory */
+    ZBAR_ERR_INTERNAL,          /**< internal library error */
+    ZBAR_ERR_UNSUPPORTED,       /**< unsupported request */
+    ZBAR_ERR_INVALID,           /**< invalid request */
+    ZBAR_ERR_SYSTEM,            /**< system error */
+    ZBAR_ERR_LOCKING,           /**< locking error */
+    ZBAR_ERR_BUSY,              /**< all resources busy */
+    ZBAR_ERR_XDISPLAY,          /**< X11 display error */
+    ZBAR_ERR_XPROTO,            /**< X11 protocol error */
+    ZBAR_ERR_CLOSED,            /**< output window is closed */
+    ZBAR_ERR_WINAPI,            /**< windows system error */
+    ZBAR_ERR_NUM                /**< number of error codes */
+} zbar_error_t;
+
+/** decoder configuration options.
+ * @since 0.4
+ */
+typedef enum zbar_config_e {
+    ZBAR_CFG_ENABLE = 0,        /**< enable symbology/feature */
+    ZBAR_CFG_ADD_CHECK,         /**< enable check digit when optional */
+    ZBAR_CFG_EMIT_CHECK,        /**< return check digit when present */
+    ZBAR_CFG_ASCII,             /**< enable full ASCII character set */
+    ZBAR_CFG_NUM,               /**< number of boolean decoder configs */
+
+    ZBAR_CFG_MIN_LEN = 0x20,    /**< minimum data length for valid decode */
+    ZBAR_CFG_MAX_LEN,           /**< maximum data length for valid decode */
+
+    ZBAR_CFG_POSITION = 0x80,   /**< enable scanner to collect position data */
+
+    ZBAR_CFG_X_DENSITY = 0x100, /**< image scanner vertical scan density */
+    ZBAR_CFG_Y_DENSITY,         /**< image scanner horizontal scan density */
+} zbar_config_t;
+
+/** retrieve runtime library version information.
+ * @param major set to the running major version (unless NULL)
+ * @param minor set to the running minor version (unless NULL)
+ * @returns 0
+ */
+extern int zbar_version(unsigned *major,
+                        unsigned *minor);
+
+/** set global library debug level.
+ * @param verbosity desired debug level.  higher values create more spew
+ */
+extern void zbar_set_verbosity(int verbosity);
+
+/** increase global library debug level.
+ * eg, for -vvvv
+ */
+extern void zbar_increase_verbosity(void);
+
+/** retrieve string name for symbol encoding.
+ * @param sym symbol type encoding
+ * @returns the static string name for the specified symbol type,
+ * or "UNKNOWN" if the encoding is not recognized
+ */
+extern const char *zbar_get_symbol_name(zbar_symbol_type_t sym);
+
+/** retrieve string name for addon encoding.
+ * @param sym symbol type encoding
+ * @returns static string name for any addon, or the empty string
+ * if no addons were decoded
+ */
+extern const char *zbar_get_addon_name(zbar_symbol_type_t sym);
+
+/** parse a configuration string of the form "[symbology.]config[=value]".
+ * the config must match one of the recognized names.
+ * the symbology, if present, must match one of the recognized names.
+ * if symbology is unspecified, it will be set to 0.
+ * if value is unspecified it will be set to 1.
+ * @returns 0 if the config is parsed successfully, 1 otherwise
+ * @since 0.4
+ */
+extern int zbar_parse_config(const char *config_string,
+                             zbar_symbol_type_t *symbology,
+                             zbar_config_t *config,
+                             int *value);
+
+/** @internal type unsafe error API (don't use) */
+extern int _zbar_error_spew(const void *object,
+                            int verbosity);
+extern const char *_zbar_error_string(const void *object,
+                                      int verbosity);
+extern zbar_error_t _zbar_get_error_code(const void *object);
+
+/*@}*/
+
+struct zbar_symbol_s;
+typedef struct zbar_symbol_s zbar_symbol_t;
+
+struct zbar_symbol_set_s;
+typedef struct zbar_symbol_set_s zbar_symbol_set_t;
+
+
+/*------------------------------------------------------------*/
+/** @name Symbol interface
+ * decoded barcode symbol result object.  stores type, data, and image
+ * location of decoded symbol.  all memory is owned by the library
+ */
+/*@{*/
+
+/** @typedef zbar_symbol_t
+ * opaque decoded symbol object.
+ */
+
+/** symbol reference count manipulation.
+ * increment the reference count when you store a new reference to the
+ * symbol.  decrement when the reference is no longer used.  do not
+ * refer to the symbol once the count is decremented and the
+ * containing image has been recycled or destroyed.
+ * @note the containing image holds a reference to the symbol, so you
+ * only need to use this if you keep a symbol after the image has been
+ * destroyed or reused.
+ * @since 0.9
+ */
+extern void zbar_symbol_ref(const zbar_symbol_t *symbol,
+                            int refs);
+
+/** retrieve type of decoded symbol.
+ * @returns the symbol type
+ */
+extern zbar_symbol_type_t zbar_symbol_get_type(const zbar_symbol_t *symbol);
+
+/** retrieve data decoded from symbol.
+ * @returns the data string
+ */
+extern const char *zbar_symbol_get_data(const zbar_symbol_t *symbol);
+
+/** retrieve length of binary data.
+ * @returns the length of the decoded data
+ */
+extern unsigned int zbar_symbol_get_data_length(const zbar_symbol_t *symbol);
+
+/** retrieve a symbol confidence metric.
+ * @returns an unscaled, relative quantity: larger values are better
+ * than smaller values, where "large" and "small" are application
+ * dependent.
+ * @note expect the exact definition of this quantity to change as the
+ * metric is refined.  currently, only the ordered relationship
+ * between two values is defined and will remain stable in the future
+ * @since 0.9
+ */
+extern int zbar_symbol_get_quality(const zbar_symbol_t *symbol);
+
+/** retrieve current cache count.  when the cache is enabled for the
+ * image_scanner this provides inter-frame reliability and redundancy
+ * information for video streams.
+ * @returns < 0 if symbol is still uncertain.
+ * @returns 0 if symbol is newly verified.
+ * @returns > 0 for duplicate symbols
+ */
+extern int zbar_symbol_get_count(const zbar_symbol_t *symbol);
+
+/** retrieve the number of points in the location polygon.  the
+ * location polygon defines the image area that the symbol was
+ * extracted from.
+ * @returns the number of points in the location polygon
+ * @note this is currently not a polygon, but the scan locations
+ * where the symbol was decoded
+ */
+extern unsigned zbar_symbol_get_loc_size(const zbar_symbol_t *symbol);
+
+/** retrieve location polygon x-coordinates.
+ * points are specified by 0-based index.
+ * @returns the x-coordinate for a point in the location polygon.
+ * @returns -1 if index is out of range
+ */
+extern int zbar_symbol_get_loc_x(const zbar_symbol_t *symbol,
+                                 unsigned index);
+
+/** retrieve location polygon y-coordinates.
+ * points are specified by 0-based index.
+ * @returns the y-coordinate for a point in the location polygon.
+ * @returns -1 if index is out of range
+ */
+extern int zbar_symbol_get_loc_y(const zbar_symbol_t *symbol,
+                                 unsigned index);
+
+/** iterate the set to which this symbol belongs (there can be only one).
+ * @returns the next symbol in the set, or
+ * @returns NULL when no more results are available
+ */
+extern const zbar_symbol_t *zbar_symbol_next(const zbar_symbol_t *symbol);
+
+/** retrieve components of a composite result.
+ * @returns the symbol set containing the components
+ * @returns NULL if the symbol is already a physical symbol
+ * @since 0.10
+ */
+extern const zbar_symbol_set_t*
+zbar_symbol_get_components(const zbar_symbol_t *symbol);
+
+/** iterate components of a composite result.
+ * @returns the first physical component symbol of a composite result
+ * @returns NULL if the symbol is already a physical symbol
+ * @since 0.10
+ */
+extern const zbar_symbol_t*
+zbar_symbol_first_component(const zbar_symbol_t *symbol);
+
+/** print XML symbol element representation to user result buffer.
+ * @see http://zbar.sourceforge.net/2008/barcode.xsd for the schema.
+ * @param symbol is the symbol to print
+ * @param buffer is the inout result pointer, it will be reallocated
+ * with a larger size if necessary.
+ * @param buflen is inout length of the result buffer.
+ * @returns the buffer pointer
+ * @since 0.6
+ */
+extern char *zbar_symbol_xml(const zbar_symbol_t *symbol,
+                             char **buffer,
+                             unsigned *buflen);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Symbol Set interface
+ * container for decoded result symbols associated with an image
+ * or a composite symbol.
+ * @since 0.10
+ */
+/*@{*/
+
+/** @typedef zbar_symbol_set_t
+ * opaque symbol iterator object.
+ * @since 0.10
+ */
+
+/** reference count manipulation.
+ * increment the reference count when you store a new reference.
+ * decrement when the reference is no longer used.  do not refer to
+ * the object any longer once references have been released.
+ * @since 0.10
+ */
+extern void zbar_symbol_set_ref(const zbar_symbol_set_t *symbols,
+                                int refs);
+
+/** retrieve set size.
+ * @returns the number of symbols in the set.
+ * @since 0.10
+ */
+extern int zbar_symbol_set_get_size(const zbar_symbol_set_t *symbols);
+
+/** set iterator.
+ * @returns the first decoded symbol result in a set
+ * @returns NULL if the set is empty
+ * @since 0.10
+ */
+extern const zbar_symbol_t*
+zbar_symbol_set_first_symbol(const zbar_symbol_set_t *symbols);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Image interface
+ * stores image data samples along with associated format and size
+ * metadata
+ */
+/*@{*/
+
+struct zbar_image_s;
+/** opaque image object. */
+typedef struct zbar_image_s zbar_image_t;
+
+/** cleanup handler callback function.
+ * called to free sample data when an image is destroyed.
+ */
+typedef void (zbar_image_cleanup_handler_t)(zbar_image_t *image);
+
+/** data handler callback function.
+ * called when decoded symbol results are available for an image
+ */
+typedef void (zbar_image_data_handler_t)(zbar_image_t *image,
+                                         const void *userdata);
+
+/** new image constructor.
+ * @returns a new image object with uninitialized data and format.
+ * this image should be destroyed (using zbar_image_destroy()) as
+ * soon as the application is finished with it
+ */
+extern zbar_image_t *zbar_image_create(void);
+
+/** image destructor.  all images created by or returned to the
+ * application should be destroyed using this function.  when an image
+ * is destroyed, the associated data cleanup handler will be invoked
+ * if available
+ * @note make no assumptions about the image or the data buffer.
+ * they may not be destroyed/cleaned immediately if the library
+ * is still using them.  if necessary, use the cleanup handler hook
+ * to keep track of image data buffers
+ */
+extern void zbar_image_destroy(zbar_image_t *image);
+
+/** image reference count manipulation.
+ * increment the reference count when you store a new reference to the
+ * image.  decrement when the reference is no longer used.  do not
+ * refer to the image any longer once the count is decremented.
+ * zbar_image_ref(image, -1) is the same as zbar_image_destroy(image)
+ * @since 0.5
+ */
+extern void zbar_image_ref(zbar_image_t *image,
+                           int refs);
+
+/** image format conversion.  refer to the documentation for supported
+ * image formats
+ * @returns a @em new image with the sample data from the original image
+ * converted to the requested format.  the original image is
+ * unaffected.
+ * @note the converted image size may be rounded (up) due to format
+ * constraints
+ */
+extern zbar_image_t *zbar_image_convert(const zbar_image_t *image,
+                                        unsigned long format);
+
+/** image format conversion with crop/pad.
+ * if the requested size is larger than the image, the last row/column
+ * are duplicated to cover the difference.  if the requested size is
+ * smaller than the image, the extra rows/columns are dropped from the
+ * right/bottom.
+ * @returns a @em new image with the sample data from the original
+ * image converted to the requested format and size.
+ * @note the image is @em not scaled
+ * @see zbar_image_convert()
+ * @since 0.4
+ */
+extern zbar_image_t *zbar_image_convert_resize(const zbar_image_t *image,
+                                               unsigned long format,
+                                               unsigned width,
+                                               unsigned height);
+
+/** retrieve the image format.
+ * @returns the fourcc describing the format of the image sample data
+ */
+extern unsigned long zbar_image_get_format(const zbar_image_t *image);
+
+/** retrieve a "sequence" (page/frame) number associated with this image.
+ * @since 0.6
+ */
+extern unsigned zbar_image_get_sequence(const zbar_image_t *image);
+
+/** retrieve the width of the image.
+ * @returns the width in sample columns
+ */
+extern unsigned zbar_image_get_width(const zbar_image_t *image);
+
+/** retrieve the height of the image.
+ * @returns the height in sample rows
+ */
+extern unsigned zbar_image_get_height(const zbar_image_t *image);
+
+/** return the image sample data.  the returned data buffer is only
+ * valid until zbar_image_destroy() is called
+ */
+extern const void *zbar_image_get_data(const zbar_image_t *image);
+
+/** return the size of image data.
+ * @since 0.6
+ */
+extern unsigned long zbar_image_get_data_length(const zbar_image_t *img);
+
+/** retrieve the decoded results.
+ * @returns the (possibly empty) set of decoded symbols
+ * @returns NULL if the image has not been scanned
+ * @since 0.10
+ */
+extern const zbar_symbol_set_t*
+zbar_image_get_symbols(const zbar_image_t *image);
+
+/** associate the specified symbol set with the image, replacing any
+ * existing results.  use NULL to release the current results from the
+ * image.
+ * @see zbar_image_scanner_recycle_image()
+ * @since 0.10
+ */
+extern void zbar_image_set_symbols(zbar_image_t *image,
+                                   const zbar_symbol_set_t *symbols);
+
+/** image_scanner decode result iterator.
+ * @returns the first decoded symbol result for an image
+ * or NULL if no results are available
+ */
+extern const zbar_symbol_t*
+zbar_image_first_symbol(const zbar_image_t *image);
+
+/** specify the fourcc image format code for image sample data.
+ * refer to the documentation for supported formats.
+ * @note this does not convert the data!
+ * (see zbar_image_convert() for that)
+ */
+extern void zbar_image_set_format(zbar_image_t *image,
+                                  unsigned long format);
+
+/** associate a "sequence" (page/frame) number with this image.
+ * @since 0.6
+ */
+extern void zbar_image_set_sequence(zbar_image_t *image,
+                                    unsigned sequence_num);
+
+/** specify the pixel size of the image.
+ * @note this does not affect the data!
+ */
+extern void zbar_image_set_size(zbar_image_t *image,
+                                unsigned width,
+                                unsigned height);
+
+/** specify image sample data.  when image data is no longer needed by
+ * the library the specific data cleanup handler will be called
+ * (unless NULL)
+ * @note application image data will not be modified by the library
+ */
+extern void zbar_image_set_data(zbar_image_t *image,
+                                const void *data,
+                                unsigned long data_byte_length,
+                                zbar_image_cleanup_handler_t *cleanup_hndlr);
+
+/** built-in cleanup handler.
+ * passes the image data buffer to free()
+ */
+extern void zbar_image_free_data(zbar_image_t *image);
+
+/** associate user specified data value with an image.
+ * @since 0.5
+ */
+extern void zbar_image_set_userdata(zbar_image_t *image,
+                                    void *userdata);
+
+/** return user specified data value associated with the image.
+ * @since 0.5
+ */
+extern void *zbar_image_get_userdata(const zbar_image_t *image);
+
+/** dump raw image data to a file for debug.
+ * the data will be prefixed with a 16 byte header consisting of:
+ *   - 4 bytes uint = 0x676d697a ("zimg")
+ *   - 4 bytes format fourcc
+ *   - 2 bytes width
+ *   - 2 bytes height
+ *   - 4 bytes size of following image data in bytes
+ * this header can be dumped w/eg:
+ * @verbatim
+       od -Ax -tx1z -N16 -w4 [file]
+@endverbatim
+ * for some formats the image can be displayed/converted using
+ * ImageMagick, eg:
+ * @verbatim
+       display -size 640x480+16 [-depth ?] [-sampling-factor ?x?] \
+           {GRAY,RGB,UYVY,YUV}:[file]
+@endverbatim
+ *
+ * @param image the image object to dump
+ * @param filebase base filename, appended with ".XXXX.zimg" where
+ * XXXX is the format fourcc
+ * @returns 0 on success or a system error code on failure
+ */
+extern int zbar_image_write(const zbar_image_t *image,
+                            const char *filebase);
+
+/** read back an image in the format written by zbar_image_write()
+ * @note TBD
+ */
+extern zbar_image_t *zbar_image_read(char *filename);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Processor interface
+ * @anchor c-processor
+ * high-level self-contained image processor.
+ * processes video and images for barcodes, optionally displaying
+ * images to a library owned output window
+ */
+/*@{*/
+
+struct zbar_processor_s;
+/** opaque standalone processor object. */
+typedef struct zbar_processor_s zbar_processor_t;
+
+/** constructor.
+ * if threaded is set and threading is available the processor
+ * will spawn threads where appropriate to avoid blocking and
+ * improve responsiveness
+ */
+extern zbar_processor_t *zbar_processor_create(int threaded);
+
+/** destructor.  cleans up all resources associated with the processor
+ */
+extern void zbar_processor_destroy(zbar_processor_t *processor);
+
+/** (re)initialization.
+ * opens a video input device and/or prepares to display output
+ */
+extern int zbar_processor_init(zbar_processor_t *processor,
+                               const char *video_device,
+                               int enable_display);
+
+/** request a preferred size for the video image from the device.
+ * the request may be adjusted or completely ignored by the driver.
+ * @note must be called before zbar_processor_init()
+ * @since 0.6
+ */
+extern int zbar_processor_request_size(zbar_processor_t *processor,
+                                       unsigned width,
+                                       unsigned height);
+
+/** request a preferred video driver interface version for
+ * debug/testing.
+ * @note must be called before zbar_processor_init()
+ * @since 0.6
+ */
+extern int zbar_processor_request_interface(zbar_processor_t *processor,
+                                            int version);
+
+/** request a preferred video I/O mode for debug/testing.  You will
+ * get errors if the driver does not support the specified mode.
+ * @verbatim
+    0 = auto-detect
+    1 = force I/O using read()
+    2 = force memory mapped I/O using mmap()
+    3 = force USERPTR I/O (v4l2 only)
+@endverbatim
+ * @note must be called before zbar_processor_init()
+ * @since 0.7
+ */
+extern int zbar_processor_request_iomode(zbar_processor_t *video,
+                                         int iomode);
+
+/** force specific input and output formats for debug/testing.
+ * @note must be called before zbar_processor_init()
+ */
+extern int zbar_processor_force_format(zbar_processor_t *processor,
+                                       unsigned long input_format,
+                                       unsigned long output_format);
+
+/** setup result handler callback.
+ * the specified function will be called by the processor whenever
+ * new results are available from the video stream or a static image.
+ * pass a NULL value to disable callbacks.
+ * @param processor the object on which to set the handler.
+ * @param handler the function to call when new results are available.
+ * @param userdata is set as with zbar_processor_set_userdata().
+ * @returns the previously registered handler
+ */
+extern zbar_image_data_handler_t*
+zbar_processor_set_data_handler(zbar_processor_t *processor,
+                                zbar_image_data_handler_t *handler,
+                                const void *userdata);
+
+/** associate user specified data value with the processor.
+ * @since 0.6
+ */
+extern void zbar_processor_set_userdata(zbar_processor_t *processor,
+                                        void *userdata);
+
+/** return user specified data value associated with the processor.
+ * @since 0.6
+ */
+extern void *zbar_processor_get_userdata(const zbar_processor_t *processor);
+
+/** set config for indicated symbology (0 for all) to specified value.
+ * @returns 0 for success, non-0 for failure (config does not apply to
+ * specified symbology, or value out of range)
+ * @see zbar_decoder_set_config()
+ * @since 0.4
+ */
+extern int zbar_processor_set_config(zbar_processor_t *processor,
+                                     zbar_symbol_type_t symbology,
+                                     zbar_config_t config,
+                                     int value);
+
+/** parse configuration string using zbar_parse_config()
+ * and apply to processor using zbar_processor_set_config().
+ * @returns 0 for success, non-0 for failure
+ * @see zbar_parse_config()
+ * @see zbar_processor_set_config()
+ * @since 0.4
+ */
+static inline int zbar_processor_parse_config (zbar_processor_t *processor,
+                                               const char *config_string)
+{
+    zbar_symbol_type_t sym;
+    zbar_config_t cfg;
+    int val;
+    return(zbar_parse_config(config_string, &sym, &cfg, &val) ||
+           zbar_processor_set_config(processor, sym, cfg, val));
+}
+
+/** retrieve the current state of the ouput window.
+ * @returns 1 if the output window is currently displayed, 0 if not.
+ * @returns -1 if an error occurs
+ */
+extern int zbar_processor_is_visible(zbar_processor_t *processor);
+
+/** show or hide the display window owned by the library.
+ * the size will be adjusted to the input size
+ */
+extern int zbar_processor_set_visible(zbar_processor_t *processor,
+                                      int visible);
+
+/** control the processor in free running video mode.
+ * only works if video input is initialized. if threading is in use,
+ * scanning will occur in the background, otherwise this is only
+ * useful wrapping calls to zbar_processor_user_wait(). if the
+ * library output window is visible, video display will be enabled.
+ */
+extern int zbar_processor_set_active(zbar_processor_t *processor,
+                                     int active);
+
+/** retrieve decode results for last scanned image/frame.
+ * @returns the symbol set result container or NULL if no results are
+ * available
+ * @note the returned symbol set has its reference count incremented;
+ * ensure that the count is decremented after use
+ * @since 0.10
+ */
+extern const zbar_symbol_set_t*
+zbar_processor_get_results(const zbar_processor_t *processor);
+
+/** wait for input to the display window from the user
+ * (via mouse or keyboard).
+ * @returns >0 when input is received, 0 if timeout ms expired
+ * with no input or -1 in case of an error
+ */
+extern int zbar_processor_user_wait(zbar_processor_t *processor,
+                                    int timeout);
+
+/** process from the video stream until a result is available,
+ * or the timeout (in milliseconds) expires.
+ * specify a timeout of -1 to scan indefinitely
+ * (zbar_processor_set_active() may still be used to abort the scan
+ * from another thread).
+ * if the library window is visible, video display will be enabled.
+ * @note that multiple results may still be returned (despite the
+ * name).
+ * @returns >0 if symbols were successfully decoded,
+ * 0 if no symbols were found (ie, the timeout expired)
+ * or -1 if an error occurs
+ */
+extern int zbar_process_one(zbar_processor_t *processor,
+                            int timeout);
+
+/** process the provided image for barcodes.
+ * if the library window is visible, the image will be displayed.
+ * @returns >0 if symbols were successfully decoded,
+ * 0 if no symbols were found or -1 if an error occurs
+ */
+extern int zbar_process_image(zbar_processor_t *processor,
+                              zbar_image_t *image);
+
+/** display detail for last processor error to stderr.
+ * @returns a non-zero value suitable for passing to exit()
+ */
+static inline int
+zbar_processor_error_spew (const zbar_processor_t *processor,
+                           int verbosity)
+{
+    return(_zbar_error_spew(processor, verbosity));
+}
+
+/** retrieve the detail string for the last processor error. */
+static inline const char*
+zbar_processor_error_string (const zbar_processor_t *processor,
+                             int verbosity)
+{
+    return(_zbar_error_string(processor, verbosity));
+}
+
+/** retrieve the type code for the last processor error. */
+static inline zbar_error_t
+zbar_processor_get_error_code (const zbar_processor_t *processor)
+{
+    return(_zbar_get_error_code(processor));
+}
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Video interface
+ * @anchor c-video
+ * mid-level video source abstraction.
+ * captures images from a video device
+ */
+/*@{*/
+
+struct zbar_video_s;
+/** opaque video object. */
+typedef struct zbar_video_s zbar_video_t;
+
+/** constructor. */
+extern zbar_video_t *zbar_video_create(void);
+
+/** destructor. */
+extern void zbar_video_destroy(zbar_video_t *video);
+
+/** open and probe a video device.
+ * the device specified by platform specific unique name
+ * (v4l device node path in *nix eg "/dev/video",
+ *  DirectShow DevicePath property in windows).
+ * @returns 0 if successful or -1 if an error occurs
+ */
+extern int zbar_video_open(zbar_video_t *video,
+                           const char *device);
+
+/** retrieve file descriptor associated with open *nix video device
+ * useful for using select()/poll() to tell when new images are
+ * available (NB v4l2 only!!).
+ * @returns the file descriptor or -1 if the video device is not open
+ * or the driver only supports v4l1
+ */
+extern int zbar_video_get_fd(const zbar_video_t *video);
+
+/** request a preferred size for the video image from the device.
+ * the request may be adjusted or completely ignored by the driver.
+ * @returns 0 if successful or -1 if the video device is already
+ * initialized
+ * @since 0.6
+ */
+extern int zbar_video_request_size(zbar_video_t *video,
+                                   unsigned width,
+                                   unsigned height);
+
+/** request a preferred driver interface version for debug/testing.
+ * @note must be called before zbar_video_open()
+ * @since 0.6
+ */
+extern int zbar_video_request_interface(zbar_video_t *video,
+                                        int version);
+
+/** request a preferred I/O mode for debug/testing.  You will get
+ * errors if the driver does not support the specified mode.
+ * @verbatim
+    0 = auto-detect
+    1 = force I/O using read()
+    2 = force memory mapped I/O using mmap()
+    3 = force USERPTR I/O (v4l2 only)
+@endverbatim
+ * @note must be called before zbar_video_open()
+ * @since 0.7
+ */
+extern int zbar_video_request_iomode(zbar_video_t *video,
+                                     int iomode);
+
+/** retrieve current output image width.
+ * @returns the width or 0 if the video device is not open
+ */
+extern int zbar_video_get_width(const zbar_video_t *video);
+
+/** retrieve current output image height.
+ * @returns the height or 0 if the video device is not open
+ */
+extern int zbar_video_get_height(const zbar_video_t *video);
+
+/** initialize video using a specific format for debug.
+ * use zbar_negotiate_format() to automatically select and initialize
+ * the best available format
+ */
+extern int zbar_video_init(zbar_video_t *video,
+                           unsigned long format);
+
+/** start/stop video capture.
+ * all buffered images are retired when capture is disabled.
+ * @returns 0 if successful or -1 if an error occurs
+ */
+extern int zbar_video_enable(zbar_video_t *video,
+                             int enable);
+
+/** retrieve next captured image.  blocks until an image is available.
+ * @returns NULL if video is not enabled or an error occurs
+ */
+extern zbar_image_t *zbar_video_next_image(zbar_video_t *video);
+
+/** display detail for last video error to stderr.
+ * @returns a non-zero value suitable for passing to exit()
+ */
+static inline int zbar_video_error_spew (const zbar_video_t *video,
+                                         int verbosity)
+{
+    return(_zbar_error_spew(video, verbosity));
+}
+
+/** retrieve the detail string for the last video error. */
+static inline const char *zbar_video_error_string (const zbar_video_t *video,
+                                                   int verbosity)
+{
+    return(_zbar_error_string(video, verbosity));
+}
+
+/** retrieve the type code for the last video error. */
+static inline zbar_error_t
+zbar_video_get_error_code (const zbar_video_t *video)
+{
+    return(_zbar_get_error_code(video));
+}
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Window interface
+ * @anchor c-window
+ * mid-level output window abstraction.
+ * displays images to user-specified platform specific output window
+ */
+/*@{*/
+
+struct zbar_window_s;
+/** opaque window object. */
+typedef struct zbar_window_s zbar_window_t;
+
+/** constructor. */
+extern zbar_window_t *zbar_window_create(void);
+
+/** destructor. */
+extern void zbar_window_destroy(zbar_window_t *window);
+
+/** associate reader with an existing platform window.
+ * This can be any "Drawable" for X Windows or a "HWND" for windows.
+ * input images will be scaled into the output window.
+ * pass NULL to detach from the resource, further input will be
+ * ignored
+ */
+extern int zbar_window_attach(zbar_window_t *window,
+                              void *x11_display_w32_hwnd,
+                              unsigned long x11_drawable);
+
+/** control content level of the reader overlay.
+ * the overlay displays graphical data for informational or debug
+ * purposes.  higher values increase the level of annotation (possibly
+ * decreasing performance). @verbatim
+    0 = disable overlay
+    1 = outline decoded symbols (default)
+    2 = also track and display input frame rate
+@endverbatim
+ */
+extern void zbar_window_set_overlay(zbar_window_t *window,
+                                    int level);
+
+/** retrieve current content level of reader overlay.
+ * @see zbar_window_set_overlay()
+ * @since 0.10
+ */
+extern int zbar_window_get_overlay(const zbar_window_t *window);
+
+/** draw a new image into the output window. */
+extern int zbar_window_draw(zbar_window_t *window,
+                            zbar_image_t *image);
+
+/** redraw the last image (exposure handler). */
+extern int zbar_window_redraw(zbar_window_t *window);
+
+/** resize the image window (reconfigure handler).
+ * this does @em not update the contents of the window
+ * @since 0.3, changed in 0.4 to not redraw window
+ */
+extern int zbar_window_resize(zbar_window_t *window,
+                              unsigned width,
+                              unsigned height);
+
+/** display detail for last window error to stderr.
+ * @returns a non-zero value suitable for passing to exit()
+ */
+static inline int zbar_window_error_spew (const zbar_window_t *window,
+                                          int verbosity)
+{
+    return(_zbar_error_spew(window, verbosity));
+}
+
+/** retrieve the detail string for the last window error. */
+static inline const char*
+zbar_window_error_string (const zbar_window_t *window,
+                          int verbosity)
+{
+    return(_zbar_error_string(window, verbosity));
+}
+
+/** retrieve the type code for the last window error. */
+static inline zbar_error_t
+zbar_window_get_error_code (const zbar_window_t *window)
+{
+    return(_zbar_get_error_code(window));
+}
+
+
+/** select a compatible format between video input and output window.
+ * the selection algorithm attempts to use a format shared by
+ * video input and window output which is also most useful for
+ * barcode scanning.  if a format conversion is necessary, it will
+ * heuristically attempt to minimize the cost of the conversion
+ */
+extern int zbar_negotiate_format(zbar_video_t *video,
+                                 zbar_window_t *window);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Image Scanner interface
+ * @anchor c-imagescanner
+ * mid-level image scanner interface.
+ * reads barcodes from 2-D images
+ */
+/*@{*/
+
+struct zbar_image_scanner_s;
+/** opaque image scanner object. */
+typedef struct zbar_image_scanner_s zbar_image_scanner_t;
+
+/** constructor. */
+extern zbar_image_scanner_t *zbar_image_scanner_create(void);
+
+/** destructor. */
+extern void zbar_image_scanner_destroy(zbar_image_scanner_t *scanner);
+
+/** setup result handler callback.
+ * the specified function will be called by the scanner whenever
+ * new results are available from a decoded image.
+ * pass a NULL value to disable callbacks.
+ * @returns the previously registered handler
+ */
+extern zbar_image_data_handler_t*
+zbar_image_scanner_set_data_handler(zbar_image_scanner_t *scanner,
+                                    zbar_image_data_handler_t *handler,
+                                    const void *userdata);
+
+
+/** set config for indicated symbology (0 for all) to specified value.
+ * @returns 0 for success, non-0 for failure (config does not apply to
+ * specified symbology, or value out of range)
+ * @see zbar_decoder_set_config()
+ * @since 0.4
+ */
+extern int zbar_image_scanner_set_config(zbar_image_scanner_t *scanner,
+                                         zbar_symbol_type_t symbology,
+                                         zbar_config_t config,
+                                         int value);
+
+/** parse configuration string using zbar_parse_config()
+ * and apply to image scanner using zbar_image_scanner_set_config().
+ * @returns 0 for success, non-0 for failure
+ * @see zbar_parse_config()
+ * @see zbar_image_scanner_set_config()
+ * @since 0.4
+ */
+static inline int
+zbar_image_scanner_parse_config (zbar_image_scanner_t *scanner,
+                                 const char *config_string)
+{
+    zbar_symbol_type_t sym;
+    zbar_config_t cfg;
+    int val;
+    return(zbar_parse_config(config_string, &sym, &cfg, &val) ||
+           zbar_image_scanner_set_config(scanner, sym, cfg, val));
+}
+
+/** enable or disable the inter-image result cache (default disabled).
+ * mostly useful for scanning video frames, the cache filters
+ * duplicate results from consecutive images, while adding some
+ * consistency checking and hysteresis to the results.
+ * this interface also clears the cache
+ */
+extern void zbar_image_scanner_enable_cache(zbar_image_scanner_t *scanner,
+                                            int enable);
+
+/** remove any previously decoded results from the image scanner and the
+ * specified image.  somewhat more efficient version of
+ * zbar_image_set_symbols(image, NULL) which may retain memory for
+ * subsequent decodes
+ * @since 0.10
+ */
+extern void zbar_image_scanner_recycle_image(zbar_image_scanner_t *scanner,
+                                             zbar_image_t *image);
+
+/** retrieve decode results for last scanned image.
+ * @returns the symbol set result container or NULL if no results are
+ * available
+ * @note the symbol set does not have its reference count adjusted;
+ * ensure that the count is incremented if the results may be kept
+ * after the next image is scanned
+ * @since 0.10
+ */
+extern const zbar_symbol_set_t*
+zbar_image_scanner_get_results(const zbar_image_scanner_t *scanner);
+
+/** scan for symbols in provided image.  The image format must be
+ * "Y800" or "GRAY".
+ * @returns >0 if symbols were successfully decoded from the image,
+ * 0 if no symbols were found or -1 if an error occurs
+ * @see zbar_image_convert()
+ * @since 0.9 - changed to only accept grayscale images
+ */
+extern int zbar_scan_image(zbar_image_scanner_t *scanner,
+                           zbar_image_t *image);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Decoder interface
+ * @anchor c-decoder
+ * low-level bar width stream decoder interface.
+ * identifies symbols and extracts encoded data
+ */
+/*@{*/
+
+struct zbar_decoder_s;
+/** opaque decoder object. */
+typedef struct zbar_decoder_s zbar_decoder_t;
+
+/** decoder data handler callback function.
+ * called by decoder when new data has just been decoded
+ */
+typedef void (zbar_decoder_handler_t)(zbar_decoder_t *decoder);
+
+/** constructor. */
+extern zbar_decoder_t *zbar_decoder_create(void);
+
+/** destructor. */
+extern void zbar_decoder_destroy(zbar_decoder_t *decoder);
+
+/** set config for indicated symbology (0 for all) to specified value.
+ * @returns 0 for success, non-0 for failure (config does not apply to
+ * specified symbology, or value out of range)
+ * @since 0.4
+ */
+extern int zbar_decoder_set_config(zbar_decoder_t *decoder,
+                                   zbar_symbol_type_t symbology,
+                                   zbar_config_t config,
+                                   int value);
+
+/** parse configuration string using zbar_parse_config()
+ * and apply to decoder using zbar_decoder_set_config().
+ * @returns 0 for success, non-0 for failure
+ * @see zbar_parse_config()
+ * @see zbar_decoder_set_config()
+ * @since 0.4
+ */
+static inline int zbar_decoder_parse_config (zbar_decoder_t *decoder,
+                                             const char *config_string)
+{
+    zbar_symbol_type_t sym;
+    zbar_config_t cfg;
+    int val;
+    return(zbar_parse_config(config_string, &sym, &cfg, &val) ||
+           zbar_decoder_set_config(decoder, sym, cfg, val));
+}
+
+/** clear all decoder state.
+ * any partial symbols are flushed
+ */
+extern void zbar_decoder_reset(zbar_decoder_t *decoder);
+
+/** mark start of a new scan pass.
+ * clears any intra-symbol state and resets color to ::ZBAR_SPACE.
+ * any partially decoded symbol state is retained
+ */
+extern void zbar_decoder_new_scan(zbar_decoder_t *decoder);
+
+/** process next bar/space width from input stream.
+ * the width is in arbitrary relative units.  first value of a scan
+ * is ::ZBAR_SPACE width, alternating from there.
+ * @returns appropriate symbol type if width completes
+ * decode of a symbol (data is available for retrieval)
+ * @returns ::ZBAR_PARTIAL as a hint if part of a symbol was decoded
+ * @returns ::ZBAR_NONE (0) if no new symbol data is available
+ */
+extern zbar_symbol_type_t zbar_decode_width(zbar_decoder_t *decoder,
+                                            unsigned width);
+
+/** retrieve color of @em next element passed to
+ * zbar_decode_width(). */
+extern zbar_color_t zbar_decoder_get_color(const zbar_decoder_t *decoder);
+
+/** retrieve last decoded data.
+ * @returns the data string or NULL if no new data available.
+ * the returned data buffer is owned by library, contents are only
+ * valid between non-0 return from zbar_decode_width and next library
+ * call
+ */
+extern const char *zbar_decoder_get_data(const zbar_decoder_t *decoder);
+
+/** retrieve length of binary data.
+ * @returns the length of the decoded data or 0 if no new data
+ * available.
+ */
+extern unsigned int
+zbar_decoder_get_data_length(const zbar_decoder_t *decoder);
+
+/** retrieve last decoded symbol type.
+ * @returns the type or ::ZBAR_NONE if no new data available
+ */
+extern zbar_symbol_type_t
+zbar_decoder_get_type(const zbar_decoder_t *decoder);
+
+/** setup data handler callback.
+ * the registered function will be called by the decoder
+ * just before zbar_decode_width() returns a non-zero value.
+ * pass a NULL value to disable callbacks.
+ * @returns the previously registered handler
+ */
+extern zbar_decoder_handler_t*
+zbar_decoder_set_handler(zbar_decoder_t *decoder,
+                         zbar_decoder_handler_t *handler);
+
+/** associate user specified data value with the decoder. */
+extern void zbar_decoder_set_userdata(zbar_decoder_t *decoder,
+                                      void *userdata);
+
+/** return user specified data value associated with the decoder. */
+extern void *zbar_decoder_get_userdata(const zbar_decoder_t *decoder);
+
+/*@}*/
+
+/*------------------------------------------------------------*/
+/** @name Scanner interface
+ * @anchor c-scanner
+ * low-level linear intensity sample stream scanner interface.
+ * identifies "bar" edges and measures width between them.
+ * optionally passes to bar width decoder
+ */
+/*@{*/
+
+struct zbar_scanner_s;
+/** opaque scanner object. */
+typedef struct zbar_scanner_s zbar_scanner_t;
+
+/** constructor.
+ * if decoder is non-NULL it will be attached to scanner
+ * and called automatically at each new edge
+ * current color is initialized to ::ZBAR_SPACE
+ * (so an initial BAR->SPACE transition may be discarded)
+ */
+extern zbar_scanner_t *zbar_scanner_create(zbar_decoder_t *decoder);
+
+/** destructor. */
+extern void zbar_scanner_destroy(zbar_scanner_t *scanner);
+
+/** clear all scanner state.
+ * also resets an associated decoder
+ */
+extern zbar_symbol_type_t zbar_scanner_reset(zbar_scanner_t *scanner);
+
+/** mark start of a new scan pass. resets color to ::ZBAR_SPACE.
+ * also updates an associated decoder.
+ * @returns any decode results flushed from the pipeline
+ * @note when not using callback handlers, the return value should
+ * be checked the same as zbar_scan_y()
+ * @note call zbar_scanner_flush() at least twice before calling this
+ * method to ensure no decode results are lost
+ */
+extern zbar_symbol_type_t zbar_scanner_new_scan(zbar_scanner_t *scanner);
+
+/** flush scanner processing pipeline.
+ * forces current scanner position to be a scan boundary.
+ * call multiple times (max 3) to completely flush decoder.
+ * @returns any decode/scan results flushed from the pipeline
+ * @note when not using callback handlers, the return value should
+ * be checked the same as zbar_scan_y()
+ * @since 0.9
+ */
+extern zbar_symbol_type_t zbar_scanner_flush(zbar_scanner_t *scanner);
+
+/** process next sample intensity value.
+ * intensity (y) is in arbitrary relative units.
+ * @returns result of zbar_decode_width() if a decoder is attached,
+ * otherwise @returns (::ZBAR_PARTIAL) when new edge is detected
+ * or 0 (::ZBAR_NONE) if no new edge is detected
+ */
+extern zbar_symbol_type_t zbar_scan_y(zbar_scanner_t *scanner,
+                                      int y);
+
+/** process next sample from RGB (or BGR) triple. */
+static inline zbar_symbol_type_t zbar_scan_rgb24 (zbar_scanner_t *scanner,
+                                                    unsigned char *rgb)
+{
+    return(zbar_scan_y(scanner, rgb[0] + rgb[1] + rgb[2]));
+}
+
+/** retrieve last scanned width. */
+extern unsigned zbar_scanner_get_width(const zbar_scanner_t *scanner);
+
+/** retrieve sample position of last edge.
+ * @since 0.10
+ */
+extern unsigned zbar_scanner_get_edge(const zbar_scanner_t *scn,
+                                      unsigned offset,
+                                      int prec);
+
+/** retrieve last scanned color. */
+extern zbar_color_t zbar_scanner_get_color(const zbar_scanner_t *scanner);
+
+/*@}*/
+
+#ifdef __cplusplus
+    }
+}
+
+# include "zbar/Exception.h"
+# include "zbar/Decoder.h"
+# include "zbar/Scanner.h"
+# include "zbar/Symbol.h"
+# include "zbar/Image.h"
+# include "zbar/ImageScanner.h"
+# include "zbar/Video.h"
+# include "zbar/Window.h"
+# include "zbar/Processor.h"
+#endif
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Decoder.h b/Software/External_Repositories/ZBar/include/zbar/Decoder.h
new file mode 100644
index 000000000..3e65d5ed5
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Decoder.h
@@ -0,0 +1,193 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_DECODER_H_
+#define _ZBAR_DECODER_H_
+
+/// @file
+/// Decoder C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Decoder.h"
+#endif
+
+#include <string>
+
+namespace zbar {
+
+/// low-level bar width stream decoder interface.
+/// identifies symbols and extracts encoded data
+
+class Decoder {
+ public:
+
+    /// Decoder result handler.
+    /// applications should subtype this and pass an instance to
+    /// set_handler() to implement result processing
+    class Handler {
+    public:
+        virtual ~Handler() { }
+
+        /// invoked by the Decoder as decode results become available.
+        virtual void decode_callback(Decoder &decoder) = 0;
+    };
+
+    /// constructor.
+    Decoder ()
+        : _handler(NULL)
+    {
+        _decoder = zbar_decoder_create();
+    }
+
+    ~Decoder ()
+    {
+        zbar_decoder_destroy(_decoder);
+    }
+
+    /// clear all decoder state.
+    /// see zbar_decoder_reset()
+    void reset ()
+    {
+        zbar_decoder_reset(_decoder);
+    }
+
+    /// mark start of a new scan pass.
+    /// see zbar_decoder_new_scan()
+    void new_scan ()
+    {
+        zbar_decoder_new_scan(_decoder);
+    }
+
+    /// process next bar/space width from input stream.
+    /// see zbar_decode_width()
+    zbar_symbol_type_t decode_width (unsigned width)
+    {
+        return(zbar_decode_width(_decoder, width));
+    }
+
+    /// process next bar/space width from input stream.
+    /// see zbar_decode_width()
+    Decoder& operator<< (unsigned width)
+    {
+        zbar_decode_width(_decoder, width);
+        return(*this);
+    }
+
+    /// retrieve color of @em next element passed to Decoder.
+    /// see zbar_decoder_get_color()
+    zbar_color_t get_color () const
+    {
+        return(zbar_decoder_get_color(_decoder));
+    }
+
+    /// retrieve last decoded symbol type.
+    /// see zbar_decoder_get_type()
+    zbar_symbol_type_t get_type () const
+    {
+        return(zbar_decoder_get_type(_decoder));
+    }
+
+    /// retrieve string name of last decoded symbol type.
+    /// see zbar_get_symbol_name()
+    const char *get_symbol_name () const
+    {
+        return(zbar_get_symbol_name(zbar_decoder_get_type(_decoder)));
+    }
+
+    /// retrieve string name for last decode addon.
+    /// see zbar_get_addon_name()
+    const char *get_addon_name () const
+    {
+        return(zbar_get_addon_name(zbar_decoder_get_type(_decoder)));
+    }
+
+    /// retrieve last decoded data in ASCII format as a char array.
+    /// see zbar_decoder_get_data()
+    const char *get_data_chars() const
+    {
+        return(zbar_decoder_get_data(_decoder));
+    }
+
+    /// retrieve last decoded data as a std::string.
+    /// see zbar_decoder_get_data()
+    const std::string get_data_string() const
+    {
+        return(std::string(zbar_decoder_get_data(_decoder),
+                           zbar_decoder_get_data_length(_decoder)));
+    }
+
+    /// retrieve last decoded data as a std::string.
+    /// see zbar_decoder_get_data()
+    const std::string get_data() const
+    {
+        return(get_data_string());
+    }
+
+    /// retrieve length of decoded binary data.
+    /// see zbar_decoder_get_data_length()
+    int get_data_length() const
+    {
+        return(zbar_decoder_get_data_length(_decoder));
+    }
+
+    /// setup callback to handle result data.
+    void set_handler (Handler &handler)
+    {
+        _handler = &handler;
+        zbar_decoder_set_handler(_decoder, _cb);
+        zbar_decoder_set_userdata(_decoder, this);
+    }
+
+    /// set config for indicated symbology (0 for all) to specified value.
+    /// @see zbar_decoder_set_config()
+    /// @since 0.4
+    int set_config (zbar_symbol_type_t symbology,
+                    zbar_config_t config,
+                    int value)
+    {
+        return(zbar_decoder_set_config(_decoder, symbology, config, value));
+    }
+
+    /// set config parsed from configuration string.
+    /// @see zbar_decoder_parse_config()
+    /// @since 0.4
+    int set_config (std::string cfgstr)
+    {
+        return(zbar_decoder_parse_config(_decoder, cfgstr.c_str()));
+    }
+
+ private:
+    friend class Scanner;
+    zbar_decoder_t *_decoder;
+    Handler *_handler;
+
+    static void _cb (zbar_decoder_t *cdcode)
+    {
+        Decoder *dcode = (Decoder*)zbar_decoder_get_userdata(cdcode);
+        if(dcode && dcode->_handler)
+            dcode->_handler->decode_callback(*dcode);
+    }
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Exception.h b/Software/External_Repositories/ZBar/include/zbar/Exception.h
new file mode 100644
index 000000000..236622f69
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Exception.h
@@ -0,0 +1,187 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_EXCEPTION_H_
+#define _ZBAR_EXCEPTION_H_
+
+/// @file
+/// C++ Exception definitions
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Exception.h"
+#endif
+
+#include <exception>
+#include <new>
+
+namespace zbar {
+
+/// base class for exceptions defined by this API.
+class Exception : public std::exception {
+
+public:
+    /// create exception from C library error
+    Exception (const void *obj = NULL)
+        : std::exception(),
+          _obj(obj)
+    { }
+
+    ~Exception () throw() { }
+
+    /// retrieve error message
+    virtual const char* what () const throw()
+    {
+        if(!_obj)
+            return("zbar library unspecified generic error");
+        return(_zbar_error_string(_obj, 0));
+    }
+
+private:
+    const void *_obj;
+};
+
+/// internal library error.
+class InternalError : public Exception {
+public:
+    /// create exception from C library error
+    InternalError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// unsupported request.
+class UnsupportedError : public Exception {
+public:
+    /// create exception from C library error
+    UnsupportedError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// invalid request.
+class InvalidError : public Exception {
+public:
+    /// create exception from C library error
+    InvalidError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// failed system call.
+class SystemError : public Exception {
+public:
+    /// create exception from C library error
+    SystemError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// locking error.
+class LockingError : public Exception {
+public:
+    /// create exception from C library error
+    LockingError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// all resources busy.
+class BusyError : public Exception {
+public:
+    /// create exception from C library error
+    BusyError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// X11 display error.
+class XDisplayError : public Exception {
+public:
+    /// create exception from C library error
+    XDisplayError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// X11 protocol error.
+class XProtoError : public Exception {
+public:
+    /// create exception from C library error
+    XProtoError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// output window is closed.
+class ClosedError : public Exception {
+public:
+    /// create exception from C library error
+    ClosedError (const void *obj)
+        : Exception(obj)
+    { }
+};
+
+/// image format error
+class FormatError : public Exception {
+    // FIXME needs c equivalent
+
+    virtual const char* what () const throw()
+    {
+        // FIXME what format?
+        return("unsupported format");
+    }
+};
+
+/// @internal
+
+/// extract error information and create exception.
+static inline std::exception throw_exception (const void *obj)
+{
+    switch(_zbar_get_error_code(obj)) {
+    case ZBAR_ERR_NOMEM:
+        throw std::bad_alloc();
+    case ZBAR_ERR_INTERNAL:
+        throw InternalError(obj);
+    case ZBAR_ERR_UNSUPPORTED:
+        throw UnsupportedError(obj);
+    case ZBAR_ERR_INVALID:
+        throw InvalidError(obj);
+    case ZBAR_ERR_SYSTEM:
+        throw SystemError(obj);
+    case ZBAR_ERR_LOCKING:
+        throw LockingError(obj);
+    case ZBAR_ERR_BUSY:
+        throw BusyError(obj);
+    case ZBAR_ERR_XDISPLAY:
+        throw XDisplayError(obj);
+    case ZBAR_ERR_XPROTO:
+        throw XProtoError(obj);
+    case ZBAR_ERR_CLOSED:
+        throw ClosedError(obj);
+    default:
+        throw Exception(obj);
+    }
+}
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Image.h b/Software/External_Repositories/ZBar/include/zbar/Image.h
new file mode 100644
index 000000000..e1d964404
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Image.h
@@ -0,0 +1,290 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_IMAGE_H_
+#define _ZBAR_IMAGE_H_
+
+/// @file
+/// Image C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Image.h"
+#endif
+
+#include <assert.h>
+#include <iterator>
+#include "Symbol.h"
+#include "Exception.h"
+
+namespace zbar {
+
+class Video;
+
+/// stores image data samples along with associated format and size
+/// metadata
+
+class Image {
+public:
+
+    /// general Image result handler.
+    /// applications should subtype this and pass an instance to
+    /// eg. ImageScanner::set_handler() to implement result processing
+    class Handler {
+    public:
+        virtual ~Handler() { }
+
+        /// invoked by library when Image should be processed
+        virtual void image_callback(Image &image) = 0;
+
+        /// cast this handler to the C handler
+        operator zbar_image_data_handler_t* () const
+        {
+            return(_cb);
+        }
+
+    private:
+        static void _cb (zbar_image_t *zimg,
+                         const void *userdata)
+        {
+            if(userdata) {
+                Image *image = (Image*)zbar_image_get_userdata(zimg);
+                ((Handler*)userdata)->image_callback(*image);
+            }
+        }
+    };
+
+    class SymbolIterator : public zbar::SymbolIterator {
+    public:
+        /// default constructor.
+        SymbolIterator ()
+            : zbar::SymbolIterator()
+        { }
+
+        /// constructor.
+        SymbolIterator (const SymbolSet &syms)
+            : zbar::SymbolIterator(syms)
+        { }
+
+        /// copy constructor.
+        SymbolIterator (const SymbolIterator& iter)
+            : zbar::SymbolIterator(iter)
+        { }
+    };
+
+    /// constructor.
+    /// create a new Image with the specified parameters
+    Image (unsigned width = 0,
+           unsigned height = 0,
+           const std::string& format = "",
+           const void *data = NULL,
+           unsigned long length = 0)
+        : _img(zbar_image_create())
+    {
+        zbar_image_set_userdata(_img, this);
+        if(width && height)
+            set_size(width, height);
+        if(format.length())
+            set_format(format);
+        if(data && length)
+            set_data(data, length);
+    }
+
+    ~Image ()
+    {
+        zbar_image_ref(_img, -1);
+    }
+
+    /// cast to C image object
+    operator const zbar_image_t* () const
+    {
+        return(_img);
+    }
+
+    /// cast to C image object
+    operator zbar_image_t* ()
+    {
+        return(_img);
+    }
+
+    /// retrieve the image format.
+    /// see zbar_image_get_format()
+    unsigned long get_format () const
+    {
+        return(zbar_image_get_format(_img));
+    }
+
+    /// specify the fourcc image format code for image sample data.
+    /// see zbar_image_set_format()
+    void set_format (unsigned long format)
+    {
+        zbar_image_set_format(_img, format);
+    }
+
+    /// specify the fourcc image format code for image sample data.
+    /// see zbar_image_set_format()
+    void set_format (const std::string& format)
+    {
+        if(format.length() != 4)
+            throw FormatError();
+        unsigned long fourcc = ((format[0] & 0xff) |
+                                ((format[1] & 0xff) << 8) |
+                                ((format[2] & 0xff) << 16) |
+                                ((format[3] & 0xff) << 24));
+        zbar_image_set_format(_img, fourcc);
+    }
+
+    /// retrieve a "sequence" (page/frame) number associated with this
+    /// image.
+    /// see zbar_image_get_sequence()
+    /// @since 0.6
+    unsigned get_sequence () const
+    {
+        return(zbar_image_get_sequence(_img));
+    }
+
+    /// associate a "sequence" (page/frame) number with this image.
+    /// see zbar_image_set_sequence()
+    /// @since 0.6
+    void set_sequence (unsigned sequence_num)
+    {
+        zbar_image_set_sequence(_img, sequence_num);
+    }
+
+    /// retrieve the width of the image.
+    /// see zbar_image_get_width()
+    unsigned get_width () const
+    {
+        return(zbar_image_get_width(_img));
+    }
+
+    /// retrieve the height of the image.
+    /// see zbar_image_get_height()
+    unsigned get_height () const
+    {
+        return(zbar_image_get_height(_img));
+    }
+
+    /// specify the pixel size of the image.
+    /// see zbar_image_set_size()
+    void set_size (unsigned width,
+                   unsigned height)
+    {
+        zbar_image_set_size(_img, width, height);
+    }
+
+    /// return the image sample data.
+    /// see zbar_image_get_data()
+    const void *get_data () const
+    {
+        return(zbar_image_get_data(_img));
+    }
+
+    /// return the size of the image sample data.
+    /// see zbar_image_get_data_length()
+    /// @since 0.6
+    unsigned long get_data_length () const
+    {
+        return(zbar_image_get_data_length(_img));
+    }
+
+    /// specify image sample data.
+    /// see zbar_image_set_data()
+    void set_data (const void *data,
+                   unsigned long length)
+    {
+        zbar_image_set_data(_img, data, length, _cleanup);
+    }
+
+    /// image format conversion.
+    /// see zbar_image_convert()
+    Image convert (unsigned long format) const
+    {
+        zbar_image_t *img = zbar_image_convert(_img, format);
+        if(img)
+            return(Image(img));
+        throw FormatError();
+    }
+
+    /// image format conversion with crop/pad.
+    /// see zbar_image_convert_resize()
+    /// @since 0.4
+    Image convert (unsigned long format,
+                   unsigned width,
+                   unsigned height) const
+    {
+        zbar_image_t *img =
+            zbar_image_convert_resize(_img, format, width, height);
+        if(img)
+            return(Image(img));
+        throw FormatError();
+    }
+
+    const SymbolSet get_symbols () const {
+        return(SymbolSet(zbar_image_get_symbols(_img)));
+    }
+
+    void set_symbols (const SymbolSet &syms) {
+        zbar_image_set_symbols(_img, syms);
+    }
+
+    /// create a new SymbolIterator over decoded results.
+    SymbolIterator symbol_begin () const {
+        return(SymbolIterator(get_symbols()));
+    }
+
+    /// return a SymbolIterator suitable for ending iteration.
+    SymbolIterator symbol_end () const {
+        return(SymbolIterator());
+    }
+
+protected:
+
+    friend class Video;
+
+    /// constructor.
+    /// @internal
+    /// create a new Image from a zbar_image_t C object
+    Image (zbar_image_t *src,
+           int refs = 0)
+        : _img(src)
+    {
+        if(refs)
+            zbar_image_ref(_img, refs);
+        zbar_image_set_userdata(_img, this);
+    }
+
+    /// default data cleanup (noop)
+    /// @internal
+    static void _cleanup (zbar_image_t *img)
+    {
+        // by default nothing is cleaned
+        assert(img);
+        assert(zbar_image_get_userdata(img));
+    }
+
+private:
+    zbar_image_t *_img;
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/ImageScanner.h b/Software/External_Repositories/ZBar/include/zbar/ImageScanner.h
new file mode 100644
index 000000000..bda84338d
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/ImageScanner.h
@@ -0,0 +1,130 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_IMAGE_SCANNER_H_
+#define _ZBAR_IMAGE_SCANNER_H_
+
+/// @file
+/// Image Scanner C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/ImageScanner.h"
+#endif
+
+#include "Image.h"
+
+namespace zbar {
+
+/// mid-level image scanner interface.
+/// reads barcodes from a 2-D Image
+
+class ImageScanner {
+public:
+    /// constructor.
+    ImageScanner (zbar_image_scanner_t *scanner = NULL)
+    {
+        if(scanner)
+            _scanner = scanner;
+        else
+            _scanner = zbar_image_scanner_create();
+    }
+
+    ~ImageScanner ()
+    {
+        zbar_image_scanner_destroy(_scanner);
+    }
+
+    /// cast to C image_scanner object
+    operator zbar_image_scanner_t* () const
+    {
+        return(_scanner);
+    }
+
+    /// setup result handler callback.
+    void set_handler (Image::Handler &handler)
+    {
+        zbar_image_scanner_set_data_handler(_scanner, handler, &handler);
+    }
+
+    /// set config for indicated symbology (0 for all) to specified value.
+    /// @see zbar_image_scanner_set_config()
+    /// @since 0.4
+    int set_config (zbar_symbol_type_t symbology,
+                    zbar_config_t config,
+                    int value)
+    {
+        return(zbar_image_scanner_set_config(_scanner, symbology,
+                                              config, value));
+    }
+
+    /// set config parsed from configuration string.
+    /// @see zbar_image_scanner_parse_config()
+    /// @since 0.4
+    int set_config (std::string cfgstr)
+    {
+        return(zbar_image_scanner_parse_config(_scanner, cfgstr.c_str()));
+    }
+
+    /// enable or disable the inter-image result cache.
+    /// see zbar_image_scanner_enable_cache()
+    void enable_cache (bool enable = true)
+    {
+        zbar_image_scanner_enable_cache(_scanner, enable);
+    }
+
+    /// remove previous results from scanner and image.
+    /// @see zbar_image_scanner_recycle_image()
+    /// @since 0.10
+    void recycle_image (Image &image)
+    {
+        zbar_image_scanner_recycle_image(_scanner, image);
+    }
+
+    /// retrieve decode results for last scanned image.
+    /// @see zbar_image_scanner_get_results()
+    /// @since 0.10
+    const SymbolSet get_results () const {
+        return(SymbolSet(zbar_image_scanner_get_results(_scanner)));
+    }
+
+    /// scan for symbols in provided image.
+    /// see zbar_scan_image()
+    int scan (Image& image)
+    {
+        return(zbar_scan_image(_scanner, image));
+    }
+
+    /// scan for symbols in provided image.
+    /// see zbar_scan_image()
+    ImageScanner& operator<< (Image& image)
+    {
+        scan(image);
+        return(*this);
+    }
+
+private:
+    zbar_image_scanner_t *_scanner;
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Processor.h b/Software/External_Repositories/ZBar/include/zbar/Processor.h
new file mode 100644
index 000000000..51b0e1c4a
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Processor.h
@@ -0,0 +1,223 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_PROCESSOR_H_
+#define _ZBAR_PROCESSOR_H_
+
+/// @file
+/// Processor C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Processor.h"
+#endif
+
+#include "Exception.h"
+#include "Image.h"
+
+namespace zbar {
+
+/// high-level self-contained image processor.
+/// processes video and images for barcodes, optionally displaying
+/// images to a library owned output window
+
+class Processor {
+ public:
+    /// value to pass for no timeout.
+    static const int FOREVER = -1;
+
+    /// constructor.
+    Processor (bool threaded = true,
+               const char *video_device = "",
+               bool enable_display = true)
+    {
+        _processor = zbar_processor_create(threaded);
+        if(!_processor)
+            throw std::bad_alloc();
+        init(video_device, enable_display);
+    }
+
+    ~Processor ()
+    {
+        zbar_processor_destroy(_processor);
+    }
+
+    /// cast to C processor object.
+    operator zbar_processor_t* ()
+    {
+        return(_processor);
+    }
+
+    /// opens a video input device and/or prepares to display output.
+    /// see zbar_processor_init()
+    void init (const char *video_device = "",
+               bool enable_display = true)
+    {
+        if(zbar_processor_init(_processor, video_device, enable_display))
+            throw_exception(_processor);
+    }
+
+    /// setup result handler callback.
+    /// see zbar_processor_set_data_handler()
+    void set_handler (Image::Handler& handler)
+    {
+        zbar_processor_set_data_handler(_processor, handler, &handler);
+    }
+
+    /// set config for indicated symbology (0 for all) to specified value.
+    /// @see zbar_processor_set_config()
+    /// @since 0.4
+    int set_config (zbar_symbol_type_t symbology,
+                    zbar_config_t config,
+                    int value)
+    {
+        return(zbar_processor_set_config(_processor, symbology,
+                                          config, value));
+    }
+
+    /// set config parsed from configuration string.
+    /// @see zbar_processor_parse_config()
+    /// @since 0.4
+    int set_config (std::string cfgstr)
+    {
+        return(zbar_processor_parse_config(_processor, cfgstr.c_str()));
+    }
+
+    /// retrieve the current state of the ouput window.
+    /// see zbar_processor_is_visible()
+    bool is_visible ()
+    {
+        int rc = zbar_processor_is_visible(_processor);
+        if(rc < 0)
+            throw_exception(_processor);
+        return(rc != 0);
+    }
+
+    /// show or hide the display window owned by the library.
+    /// see zbar_processor_set_visible()
+    void set_visible (bool visible = true)
+    {
+        if(zbar_processor_set_visible(_processor, visible) < 0)
+            throw_exception(_processor);
+    }
+
+    /// control the processor in free running video mode.
+    /// see zbar_processor_set_active()
+    void set_active (bool active = true)
+    {
+        if(zbar_processor_set_active(_processor, active) < 0)
+            throw_exception(_processor);
+    }
+
+    /// retrieve decode results for last scanned image.
+    /// @see zbar_processor_get_results()
+    /// @since 0.10
+    const SymbolSet get_results () const {
+        return(SymbolSet(zbar_processor_get_results(_processor)));
+    }
+
+    /// wait for input to the display window from the user.
+    /// see zbar_processor_user_wait()
+    int user_wait (int timeout = FOREVER)
+    {
+        int rc = zbar_processor_user_wait(_processor, timeout);
+        if(rc < 0)
+            throw_exception(_processor);
+        return(rc);
+    }
+
+    /// process from the video stream until a result is available.
+    /// see zbar_process_one()
+    void process_one (int timeout = FOREVER)
+    {
+        if(zbar_process_one(_processor, timeout) < 0)
+            throw_exception(_processor);
+    }
+
+    /// process the provided image for barcodes.
+    /// see zbar_process_image()
+    void process_image (Image& image)
+    {
+        if(zbar_process_image(_processor, image) < 0)
+            throw_exception(_processor);
+    }
+
+    /// process the provided image for barcodes.
+    /// see zbar_process_image()
+    Processor& operator<< (Image& image)
+    {
+        process_image(image);
+        return(*this);
+    }
+
+    /// force specific input and output formats for debug/testing.
+    /// see zbar_processor_force_format()
+    void force_format (unsigned long input_format,
+                       unsigned long output_format)
+    {
+        if(zbar_processor_force_format(_processor, input_format,
+                                        output_format))
+            throw_exception(_processor);
+    }
+
+    /// force specific input and output formats for debug/testing.
+    /// see zbar_processor_force_format()
+    void force_format (std::string& input_format,
+                       std::string& output_format)
+    {
+        unsigned long ifourcc = *(unsigned long*)input_format.c_str();
+        unsigned long ofourcc = *(unsigned long*)output_format.c_str();
+        if(zbar_processor_force_format(_processor, ifourcc, ofourcc))
+            throw_exception(_processor);
+    }
+
+    /// request a preferred size for the video image from the device.
+    /// see zbar_processor_request_size()
+    /// @since 0.6
+    void request_size (int width, int height)
+    {
+        zbar_processor_request_size(_processor, width, height);
+    }
+
+    /// request a preferred driver interface version for debug/testing.
+    /// see zbar_processor_request_interface()
+    /// @since 0.6
+    void request_interface (int version)
+    {
+        zbar_processor_request_interface(_processor, version);
+    }
+
+    /// request a preferred I/O mode for debug/testing.
+    /// see zbar_processor_request_iomode()
+    /// @since 0.7
+    void request_iomode (int iomode)
+    {
+        if(zbar_processor_request_iomode(_processor, iomode))
+            throw_exception(_processor);
+    }
+
+ private:
+    zbar_processor_t *_processor;
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Scanner.h b/Software/External_Repositories/ZBar/include/zbar/Scanner.h
new file mode 100644
index 000000000..8c9a756ba
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Scanner.h
@@ -0,0 +1,162 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_SCANNER_H_
+#define _ZBAR_SCANNER_H_
+
+/// @file
+/// Scanner C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Scanner.h"
+#endif
+
+#include <stdio.h>
+
+namespace zbar {
+
+/// low-level linear intensity sample stream scanner interface.
+/// identifies "bar" edges and measures width between them.
+/// optionally passes to bar width Decoder
+
+class Scanner {
+ public:
+
+    /// constructor.
+    /// @param decoder reference to a Decoder instance which will
+    /// be passed scan results automatically
+    Scanner (Decoder& decoder)
+    {
+        _scanner = zbar_scanner_create(decoder._decoder);
+    }
+
+    /// constructor.
+    /// @param decoder pointer to a Decoder instance which will
+    /// be passed scan results automatically
+    Scanner (Decoder* decoder = NULL)
+    {
+        zbar_decoder_t *zdcode = NULL;
+        if(decoder)
+            zdcode = decoder->_decoder;
+        _scanner = zbar_scanner_create(zdcode);
+    }
+
+    ~Scanner ()
+    {
+        zbar_scanner_destroy(_scanner);
+    }
+
+    /// clear all scanner state.
+    /// see zbar_scanner_reset()
+    void reset ()
+    {
+        zbar_scanner_reset(_scanner);
+    }
+
+    /// mark start of a new scan pass.
+    /// see zbar_scanner_new_scan()
+    zbar_symbol_type_t new_scan ()
+    {
+        _type = zbar_scanner_new_scan(_scanner);
+        return(_type);
+    }
+
+    /// flush scanner pipeline.
+    /// see zbar_scanner_flush()
+    zbar_symbol_type_t flush ()
+    {
+        _type = zbar_scanner_flush(_scanner);
+        return(_type);
+    }
+
+    /// process next sample intensity value.
+    /// see zbar_scan_y()
+    zbar_symbol_type_t scan_y (int y)
+    {
+        _type = zbar_scan_y(_scanner, y);
+        return(_type);
+    }
+
+    /// process next sample intensity value.
+    /// see zbar_scan_y()
+    Scanner& operator<< (int y)
+    {
+        _type = zbar_scan_y(_scanner, y);
+        return(*this);
+    }
+
+    /// process next sample from RGB (or BGR) triple.
+    /// see zbar_scan_rgb24()
+    zbar_symbol_type_t scan_rgb24 (unsigned char *rgb)
+    {
+        _type = zbar_scan_rgb24(_scanner, rgb);
+        return(_type);
+    }
+
+    /// process next sample from RGB (or BGR) triple.
+    /// see zbar_scan_rgb24()
+    Scanner& operator<< (unsigned char *rgb)
+    {
+        _type = zbar_scan_rgb24(_scanner, rgb);
+        return(*this);
+    }
+
+    /// retrieve last scanned width.
+    /// see zbar_scanner_get_width()
+    unsigned get_width () const
+    {
+        return(zbar_scanner_get_width(_scanner));
+    }
+
+    /// retrieve last scanned color.
+    /// see zbar_scanner_get_color()
+    zbar_color_t get_color () const
+    {
+        return(zbar_scanner_get_color(_scanner));
+    }
+
+    /// retrieve last scan result.
+    zbar_symbol_type_t get_type () const
+    {
+        return(_type);
+    }
+
+    /// cast to C scanner
+    operator zbar_scanner_t* () const
+    {
+        return(_scanner);
+    }
+
+    /// retrieve C scanner
+    const zbar_scanner_t *get_c_scanner () const
+    {
+        return(_scanner);
+    }
+
+ private:
+    zbar_scanner_t *_scanner;
+    zbar_symbol_type_t _type;
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Symbol.h b/Software/External_Repositories/ZBar/include/zbar/Symbol.h
new file mode 100644
index 000000000..b47732a2c
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Symbol.h
@@ -0,0 +1,451 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_SYMBOL_H_
+#define _ZBAR_SYMBOL_H_
+
+/// @file
+/// Symbol C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Symbol.h"
+#endif
+
+#include <stdlib.h>
+#include <string>
+#include <ostream>
+#include <assert.h>
+
+namespace zbar {
+
+class SymbolIterator;
+
+/// container for decoded result symbols associated with an image
+/// or a composite symbol.
+
+class SymbolSet {
+public:
+    /// constructor.
+    SymbolSet (const zbar_symbol_set_t *syms = NULL)
+        : _syms(syms)
+    {
+        ref();
+    }
+
+    /// copy constructor.
+    SymbolSet (const SymbolSet& syms)
+        : _syms(syms._syms)
+    {
+        ref();
+    }
+
+    /// destructor.
+    ~SymbolSet ()
+    {
+        ref(-1);
+    }
+
+    /// manipulate reference count.
+    void ref (int delta = 1) const
+    {
+        if(_syms)
+            zbar_symbol_set_ref((zbar_symbol_set_t*)_syms, delta);
+    }
+
+    /// cast to C symbol set.
+    operator const zbar_symbol_set_t* () const
+    {
+        return(_syms);
+    }
+
+    int get_size ()
+    {
+        return((_syms) ? zbar_symbol_set_get_size(_syms) : 0);
+    }
+
+    /// create a new SymbolIterator over decoded results.
+    SymbolIterator symbol_begin() const;
+
+    /// return a SymbolIterator suitable for ending iteration.
+    const SymbolIterator symbol_end() const;
+
+private:
+    const zbar_symbol_set_t *_syms;
+};
+
+/// decoded barcode symbol result object.  stores type, data, and
+/// image location of decoded symbol
+
+class Symbol {
+public:
+
+    /// image pixel location (x, y) coordinate tuple.
+    class Point {
+    public:
+        int x;  ///< x-coordinate.
+        int y;  ///< y-coordinate.
+
+        Point () { }
+
+        Point(int x, int y)
+            : x(x), y(y)
+        { }
+
+        /// copy constructor.
+        Point (const Point& pt)
+        {
+            x = pt.x;
+            y = pt.y;
+        }
+    };
+
+    /// iteration over Point objects in a symbol location polygon.
+    class PointIterator
+        : public std::iterator<std::input_iterator_tag, Point> {
+
+    public:
+        /// constructor.
+        PointIterator (const Symbol *sym = NULL,
+                       int index = 0)
+            : _sym(sym),
+              _index(index)
+        {
+            sym->ref(1);
+            if(!sym ||
+               (unsigned)_index >= zbar_symbol_get_loc_size(*_sym))
+                _index = -1;
+        }
+
+        /// constructor.
+        PointIterator (const PointIterator& iter)
+            : _sym(iter._sym),
+              _index(iter._index)
+        {
+            _sym->ref();
+        }
+
+        /// destructor.
+        ~PointIterator ()
+        {
+            _sym->ref(-1);
+        }
+
+        /// advance iterator to next Point.
+        PointIterator& operator++ ()
+        {
+            unsigned int i = ++_index;
+            if(i >= zbar_symbol_get_loc_size(*_sym))
+                _index = -1;
+            return(*this);
+        }
+
+        /// retrieve currently referenced Point.
+        const Point operator* () const
+        {
+            assert(_index >= 0);
+            return(Point(zbar_symbol_get_loc_x(*_sym, _index),
+                         zbar_symbol_get_loc_y(*_sym, _index)));
+        }
+
+        /// test if two iterators refer to the same Point in the same
+        /// Symbol.
+        bool operator== (const PointIterator& iter) const
+        {
+            return(_index == iter._index &&
+                   ((_index < 0) || _sym == iter._sym));
+        }
+
+        /// test if two iterators refer to the same Point in the same
+        /// Symbol.
+        bool operator!= (const PointIterator& iter) const
+        {
+            return(!(*this == iter));
+        }
+
+    private:
+        const Symbol *_sym;
+        int _index;
+    };
+
+    /// constructor.
+    Symbol (const zbar_symbol_t *sym = NULL)
+        : _xmlbuf(NULL),
+          _xmllen(0)
+    {
+        init(sym);
+        ref();
+    }
+
+    /// copy constructor.
+    Symbol (const Symbol& sym)
+        : _sym(sym._sym),
+          _type(sym._type),
+          _data(sym._data),
+          _xmlbuf(NULL),
+          _xmllen(0)
+    {
+        ref();
+    }
+
+    /// destructor.
+    ~Symbol () {
+        if(_xmlbuf)
+            free(_xmlbuf);
+        ref(-1);
+    }
+
+    void ref (int delta = 1) const
+    {
+        if(_sym)
+            zbar_symbol_ref((zbar_symbol_t*)_sym, delta);
+    }
+
+    /// cast to C symbol.
+    operator const zbar_symbol_t* () const
+    {
+        return(_sym);
+    }
+
+    /// test if two Symbol objects refer to the same C symbol.
+    bool operator== (const Symbol& sym) const
+    {
+        return(_sym == sym._sym);
+    }
+
+    /// test if two Symbol objects refer to the same C symbol.
+    bool operator!= (const Symbol& sym) const
+    {
+        return(!(*this == sym));
+    }
+
+    /// retrieve type of decoded symbol.
+    zbar_symbol_type_t get_type () const
+    {
+        return(_type);
+    }
+
+    /// retrieve the string name of the symbol type.
+    const std::string get_type_name () const
+    {
+        return(zbar_get_symbol_name(_type));
+    }
+
+    /// retrieve the string name for any addon.
+    const std::string get_addon_name () const
+    {
+        return(zbar_get_addon_name(_type));
+    }
+
+    /// retrieve data decoded from symbol.
+    const std::string get_data () const
+    {
+        return(_data);
+    }
+
+    /// retrieve length of binary data
+    unsigned get_data_length () const
+    {
+        return((_sym) ? zbar_symbol_get_data_length(_sym) : 0);
+    }
+
+    /// retrieve inter-frame coherency count.
+    /// see zbar_symbol_get_count()
+    /// @since 1.5
+    int get_count () const
+    {
+        return((_sym) ? zbar_symbol_get_count(_sym) : -1);
+    }
+
+    SymbolSet get_components () const
+    {
+        return(SymbolSet((_sym) ? zbar_symbol_get_components(_sym) : NULL));
+    }
+
+    /// create a new PointIterator at the start of the location
+    /// polygon.
+    PointIterator point_begin() const
+    {
+        return(PointIterator(this));
+    }
+
+    /// return a PointIterator suitable for ending iteration.
+    const PointIterator point_end() const
+    {
+        return(PointIterator());
+    }
+
+    /// see zbar_symbol_get_loc_size().
+    int get_location_size () const
+    {
+        return((_sym) ? zbar_symbol_get_loc_size(_sym) : 0);
+    }
+
+    /// see zbar_symbol_get_loc_x().
+    int get_location_x (unsigned index) const
+    {
+        return((_sym) ? zbar_symbol_get_loc_x(_sym, index) : -1);
+    }
+
+    /// see zbar_symbol_get_loc_y().
+    int get_location_y (unsigned index) const
+    {
+        return((_sym) ? zbar_symbol_get_loc_y(_sym, index) : -1);
+    }
+
+    /// see zbar_symbol_xml().
+    const std::string xml () const
+    {
+        if(!_sym)
+            return("");
+        return(zbar_symbol_xml(_sym, (char**)&_xmlbuf, (unsigned*)&_xmllen));
+    }
+
+protected:
+
+    friend class SymbolIterator;
+
+    /// (re)initialize Symbol from C symbol object.
+    void init (const zbar_symbol_t *sym = NULL)
+    {
+        _sym = sym;
+        if(sym) {
+            _type = zbar_symbol_get_type(sym);
+            _data = std::string(zbar_symbol_get_data(sym),
+                                zbar_symbol_get_data_length(sym));
+        }
+        else {
+            _type = ZBAR_NONE;
+            _data = "";
+        }
+    }
+
+private:
+    const zbar_symbol_t *_sym;
+    zbar_symbol_type_t _type;
+    std::string _data;
+    char *_xmlbuf;
+    unsigned _xmllen;
+};
+
+/// iteration over Symbol result objects in a scanned Image or SymbolSet.
+class SymbolIterator
+    : public std::iterator<std::input_iterator_tag, Symbol> {
+
+public:
+    /// default constructor.
+    SymbolIterator ()
+    { }
+
+    /// constructor.
+    SymbolIterator (const SymbolSet &syms)
+        : _syms(syms)
+    {
+        const zbar_symbol_set_t *zsyms = _syms;
+        if(zsyms)
+            _sym.init(zbar_symbol_set_first_symbol(zsyms));
+    }
+
+    /// copy constructor.
+    SymbolIterator (const SymbolIterator& iter)
+        : _syms(iter._syms)
+    {
+        const zbar_symbol_set_t *zsyms = _syms;
+        if(zsyms)
+            _sym.init(zbar_symbol_set_first_symbol(zsyms));
+    }
+
+    ~SymbolIterator ()
+    {
+        _sym.init();
+    }
+
+    /// advance iterator to next Symbol.
+    SymbolIterator& operator++ ()
+    {
+        const zbar_symbol_t *zsym = _sym;
+        if(zsym)
+            _sym.init(zbar_symbol_next(zsym));
+        else {
+            const zbar_symbol_set_t *zsyms = _syms;
+            if(zsyms)
+                _sym.init(zbar_symbol_set_first_symbol(zsyms));
+        }
+        return(*this);
+    }
+
+    /// retrieve currently referenced Symbol.
+    const Symbol operator* () const
+    {
+        return(_sym);
+    }
+
+    /// access currently referenced Symbol.
+    const Symbol* operator-> () const
+    {
+        return(&_sym);
+    }
+
+    /// test if two iterators refer to the same Symbol
+    bool operator== (const SymbolIterator& iter) const
+    {
+        // it is enough to test the symbols, as they belong
+        // to only one set (also simplifies invalid case)
+        return(_sym == iter._sym);
+    }
+
+    /// test if two iterators refer to the same Symbol
+    bool operator!= (const SymbolIterator& iter) const
+    {
+        return(!(*this == iter));
+    }
+
+    const SymbolIterator end () const {
+        return(SymbolIterator());
+    }
+
+private:
+    SymbolSet _syms;
+    Symbol _sym;
+};
+
+inline SymbolIterator SymbolSet::symbol_begin () const {
+    return(SymbolIterator(*this));
+}
+
+inline const SymbolIterator SymbolSet::symbol_end () const {
+    return(SymbolIterator());
+}
+
+/// @relates Symbol
+/// stream the string representation of a Symbol.
+static inline std::ostream& operator<< (std::ostream& out,
+                                        const Symbol& sym)
+{
+    out << sym.get_type_name()
+        << sym.get_addon_name()
+        << ":" << sym.get_data();
+    return(out);
+}
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Video.h b/Software/External_Repositories/ZBar/include/zbar/Video.h
new file mode 100644
index 000000000..2787d86b2
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Video.h
@@ -0,0 +1,170 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_VIDEO_H_
+#define _ZBAR_VIDEO_H_
+
+/// @file
+/// Video Input C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Video.h"
+#endif
+
+#include "Image.h"
+
+namespace zbar {
+
+/// mid-level video source abstraction.
+/// captures images from a video device
+
+class Video {
+public:
+    /// constructor.
+    Video (zbar_video_t *video = NULL)
+    {
+        if(video)
+            _video = video;
+        else
+            _video = zbar_video_create();
+    }
+
+    /// constructor.
+    Video (std::string& device)
+    {
+        _video = zbar_video_create();
+        open(device);
+    }
+
+    ~Video ()
+    {
+        zbar_video_destroy(_video);
+    }
+
+    /// cast to C video object.
+    operator zbar_video_t* () const
+    {
+        return(_video);
+    }
+
+    /// open and probe a video device.
+    void open (std::string& device)
+    {
+        if(zbar_video_open(_video, device.c_str()))
+            throw_exception(_video);
+    }
+
+    /// close video device if open.
+    void close ()
+    {
+        if(zbar_video_open(_video, NULL))
+            throw_exception(_video);
+    }
+
+    /// initialize video using a specific format for debug.
+    /// see zbar_video_init()
+    void init (unsigned long fourcc)
+    {
+        if(zbar_video_init(_video, fourcc))
+            throw_exception(_video);
+    }
+
+    /// initialize video using a specific format for debug.
+    /// see zbar_video_init()
+    void init (std::string& format)
+    {
+        unsigned int fourcc = *(unsigned int*)format.c_str();
+        if(zbar_video_init(_video, fourcc))
+            throw_exception(_video);
+    }
+
+    /// retrieve file descriptor associated with open *nix video device.
+    /// see zbar_video_get_fd()
+    int get_fd ()
+    {
+        return(zbar_video_get_fd(_video));
+    }
+
+    /// retrieve current output image width.
+    /// see zbar_video_get_width()
+    int get_width ()
+    {
+        return(zbar_video_get_width(_video));
+    }
+
+    /// retrieve current output image height.
+    /// see zbar_video_get_height()
+    int get_height ()
+    {
+        return(zbar_video_get_height(_video));
+    }
+
+    /// start/stop video capture.
+    /// see zbar_video_enable()
+    void enable (bool enable = true)
+    {
+        if(zbar_video_enable(_video, enable))
+            throw_exception(_video);
+    }
+
+    /// retrieve next captured image.
+    /// see zbar_video_next_image()
+    Image next_image ()
+    {
+        zbar_image_t *img = zbar_video_next_image(_video);
+        if(!img)
+            throw_exception(_video);
+        return(Image(img));
+    }
+
+    /// request a preferred size for the video image from the device.
+    /// see zbar_video_request_size()
+    /// @since 0.6
+    void request_size (int width, int height)
+    {
+        zbar_video_request_size(_video, width, height);
+    }
+
+    /// request a preferred driver interface version for debug/testing.
+    /// see zbar_video_request_interface()
+    /// @since 0.6
+    void request_interface (int version)
+    {
+        zbar_video_request_interface(_video, version);
+    }
+
+    /// request a preferred I/O mode for debug/testing.
+    /// see zbar_video_request_iomode()
+    /// @since 0.7
+    void request_iomode (int iomode)
+    {
+        if(zbar_video_request_iomode(_video, iomode))
+            throw_exception(_video);
+    }
+
+private:
+    zbar_video_t *_video;
+};
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/include/zbar/Window.h b/Software/External_Repositories/ZBar/include/zbar/Window.h
new file mode 100644
index 000000000..c91a405ae
--- /dev/null
+++ b/Software/External_Repositories/ZBar/include/zbar/Window.h
@@ -0,0 +1,136 @@
+//------------------------------------------------------------------------
+//  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+//  This file is part of the ZBar Bar Code Reader.
+//
+//  The ZBar Bar Code Reader is free software; you can redistribute it
+//  and/or modify it under the terms of the GNU Lesser Public License as
+//  published by the Free Software Foundation; either version 2.1 of
+//  the License, or (at your option) any later version.
+//
+//  The ZBar Bar Code Reader 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 Lesser Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser Public License
+//  along with the ZBar Bar Code Reader; if not, write to the Free
+//  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//  Boston, MA  02110-1301  USA
+//
+//  http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_WINDOW_H_
+#define _ZBAR_WINDOW_H_
+
+/// @file
+/// Output Window C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Window.h"
+#endif
+
+#include "Image.h"
+
+namespace zbar {
+
+/// mid-level output window abstraction.
+/// displays images to user-specified platform specific output window
+
+class Window {
+public:
+    /// constructor.
+    Window (zbar_window_t *window = NULL)
+    {
+        if(window)
+            _window = window;
+        else
+            _window = zbar_window_create();
+    }
+
+    /// constructor.
+    Window (void *x11_display_w32_hwnd,
+            unsigned long x11_drawable)
+    {
+        _window = zbar_window_create();
+        attach(x11_display_w32_hwnd, x11_drawable);
+    }
+
+    ~Window ()
+    {
+        zbar_window_destroy(_window);
+    }
+
+    /// cast to C window object.
+    operator zbar_window_t* () const
+    {
+        return(_window);
+    }
+
+    /// associate reader with an existing platform window.
+    /// see zbar_window_attach()
+    void attach (void *x11_display_w32_hwnd,
+                 unsigned long x11_drawable = 0)
+    {
+        if(zbar_window_attach(_window,
+                               x11_display_w32_hwnd, x11_drawable) < 0)
+            throw_exception(_window);
+    }
+
+    /// control content level of the reader overlay.
+    /// see zbar_window_set_overlay()
+    void set_overlay (int level)
+    {
+        zbar_window_set_overlay(_window, level);
+    }
+
+    /// retrieve current content level of reader overlay.
+    /// see zbar_window_get_overlay()
+
+    /// draw a new image into the output window.
+    /// see zbar_window_draw()
+    void draw (Image& image)
+    {
+        if(zbar_window_draw(_window, image) < 0)
+            throw_exception(_window);
+    }
+
+    /// clear the image from the output window.
+    /// see zbar_window_draw()
+    void clear ()
+    {
+        if(zbar_window_draw(_window, NULL) < 0)
+            throw_exception(_window);
+    }
+
+    /// redraw the last image.
+    /// zbar_window_redraw()
+    void redraw ()
+    {
+        if(zbar_window_redraw(_window) < 0)
+            throw_exception(_window);
+    }
+
+    /// resize the image window.
+    /// zbar_window_resize()
+    void resize (unsigned width, unsigned height)
+    {
+        if(zbar_window_resize(_window, width, height) < 0)
+            throw_exception(_window);
+    }
+
+private:
+    zbar_window_t *_window;
+};
+
+/// select a compatible format between video input and output window.
+/// see zbar_negotiate_format()
+static inline void negotiate_format (Video& video, Window& window)
+{
+    if(zbar_negotiate_format(video, window) < 0)
+        throw_exception(video);
+}
+
+}
+
+#endif
diff --git a/Software/External_Repositories/ZBar/lib/libzbar-0.def b/Software/External_Repositories/ZBar/lib/libzbar-0.def
new file mode 100644
index 000000000..6c0d54b3d
--- /dev/null
+++ b/Software/External_Repositories/ZBar/lib/libzbar-0.def
@@ -0,0 +1,120 @@
+EXPORTS
+_zbar_error_spew
+_zbar_error_string
+_zbar_get_error_code
+zbar_decode_width
+zbar_decoder_create
+zbar_decoder_destroy
+zbar_decoder_get_color
+zbar_decoder_get_data
+zbar_decoder_get_data_length
+zbar_decoder_get_type
+zbar_decoder_get_userdata
+zbar_decoder_new_scan
+zbar_decoder_reset
+zbar_decoder_set_config
+zbar_decoder_set_handler
+zbar_decoder_set_userdata
+zbar_get_addon_name
+zbar_get_symbol_name
+zbar_image_convert
+zbar_image_convert_resize
+zbar_image_copy
+zbar_image_create
+zbar_image_destroy
+zbar_image_first_symbol
+zbar_image_free_data
+zbar_image_get_data
+zbar_image_get_data_length
+zbar_image_get_format
+zbar_image_get_height
+zbar_image_get_sequence
+zbar_image_get_symbols
+zbar_image_get_userdata
+zbar_image_get_width
+zbar_image_ref
+zbar_image_scanner_create
+zbar_image_scanner_destroy
+zbar_image_scanner_enable_cache
+zbar_image_scanner_get_results
+zbar_image_scanner_recycle_image
+zbar_image_scanner_set_config
+zbar_image_scanner_set_data_handler
+zbar_image_set_data
+zbar_image_set_format
+zbar_image_set_sequence
+zbar_image_set_size
+zbar_image_set_symbols
+zbar_image_set_userdata
+zbar_image_write
+zbar_increase_verbosity
+zbar_negotiate_format
+zbar_parse_config
+zbar_process_image
+zbar_process_one
+zbar_processor_create
+zbar_processor_destroy
+zbar_processor_force_format
+zbar_processor_get_results
+zbar_processor_get_userdata
+zbar_processor_init
+zbar_processor_is_visible
+zbar_processor_request_interface
+zbar_processor_request_iomode
+zbar_processor_request_size
+zbar_processor_set_active
+zbar_processor_set_config
+zbar_processor_set_data_handler
+zbar_processor_set_userdata
+zbar_processor_set_visible
+zbar_processor_user_wait
+zbar_scan_image
+zbar_scan_y
+zbar_scanner_create
+zbar_scanner_destroy
+zbar_scanner_flush
+zbar_scanner_get_color
+zbar_scanner_get_edge
+zbar_scanner_get_state
+zbar_scanner_get_width
+zbar_scanner_new_scan
+zbar_scanner_reset
+zbar_set_verbosity
+zbar_symbol_first_component
+zbar_symbol_get_components
+zbar_symbol_get_count
+zbar_symbol_get_data
+zbar_symbol_get_data_length
+zbar_symbol_get_loc_size
+zbar_symbol_get_loc_x
+zbar_symbol_get_loc_y
+zbar_symbol_get_quality
+zbar_symbol_get_type
+zbar_symbol_next
+zbar_symbol_ref
+zbar_symbol_set_first_symbol
+zbar_symbol_set_get_size
+zbar_symbol_set_ref
+zbar_symbol_xml
+zbar_version
+zbar_video_create
+zbar_video_destroy
+zbar_video_enable
+zbar_video_get_fd
+zbar_video_get_format
+zbar_video_get_height
+zbar_video_get_width
+zbar_video_init
+zbar_video_next_image
+zbar_video_open
+zbar_video_request_interface
+zbar_video_request_iomode
+zbar_video_request_size
+zbar_window_attach
+zbar_window_create
+zbar_window_destroy
+zbar_window_draw
+zbar_window_get_overlay
+zbar_window_redraw
+zbar_window_resize
+zbar_window_set_overlay
diff --git a/Software/External_Repositories/ZBar/lib/libzbar-0.lib b/Software/External_Repositories/ZBar/lib/libzbar-0.lib
new file mode 100644
index 000000000..7b15f726d
--- /dev/null
+++ b/Software/External_Repositories/ZBar/lib/libzbar-0.lib
diff --git a/Software/External_Repositories/ZBar/lib/libzbar.dll.a b/Software/External_Repositories/ZBar/lib/libzbar.dll.a
new file mode 100644
index 000000000..a6d7f8acf
--- /dev/null
+++ b/Software/External_Repositories/ZBar/lib/libzbar.dll.a