zbarSDK 使用 demo

/*------------------------------------------------------------------------ * Copyright 2007-2010 (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_EAN2 = 2, /**< GS1 2-digit add-on */ ZBAR_EAN5 = 5, /**< GS1 5-digit add-on */ 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_COMPOSITE = 15, /**< EAN/UPC composite */ ZBAR_I25 = 25, /**< Interleaved 2 of 5. @since 0.4 */ ZBAR_DATABAR = 34, /**< GS1 DataBar (RSS). @since 0.11 */ ZBAR_DATABAR_EXP = 35, /**< GS1 DataBar Expanded. @since 0.11 */ ZBAR_CODE39 = 39, /**< Code 39. @since 0.4 */ ZBAR_PDF417 = 57, /**< PDF417. @since 0.6 */ ZBAR_QRCODE = 64, /**< QR Code. @since 0.10 */ ZBAR_CODE93 = 93, /**< Code 93. @since 0.11 */ ZBAR_CODE128 = 128, /**< Code 128 */ /** mask for base symbol type. * @deprecated in 0.11, remove this from existing code */ ZBAR_SYMBOL = 0x00ff, /** 2-digit add-on flag. * @deprecated in 0.11, a ::ZBAR_EAN2 component is used for * 2-digit GS1 add-ons */ ZBAR_ADDON2 = 0x0200, /** 5-digit add-on flag. * @deprecated in 0.11, a ::ZBAR_EAN5 component is used for * 5-digit GS1 add-ons */ ZBAR_ADDON5 = 0x0500, /** add-on flag mask. * @deprecated in 0.11, GS1 add-ons are represented using composite * symbols of type ::ZBAR_COMPOSITE; add-on components use ::ZBAR_EAN2 * or ::ZBAR_EAN5 */ ZBAR_ADDON = 0x0700, } zbar_symbol_type_t; /** decoded symbol coarse orientation. * @since 0.11 */ typedef enum zbar_orientation_e { ZBAR_ORIENT_UNKNOWN = -1, /**< unable to determine orientation */ ZBAR_ORIENT_UP, /**< upright, read left to right */ ZBAR_ORIENT_RIGHT, /**< sideways, read top to bottom */ ZBAR_ORIENT_DOWN, /**< upside-down, read right to left */ ZBAR_ORIENT_LEFT, /**< sideways, read bottom to top */ } zbar_orientation_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_UNCERTAINTY = 0x40,/**< required video consistency frames */ 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; /** decoder symbology modifier flags. * @since 0.11 */ typedef enum zbar_modifier_e { /** barcode tagged as GS1 (EAN.UCC) reserved * (eg, FNC1 before first data character). * data may be parsed as a sequence of GS1 AIs */ ZBAR_MOD_GS1 = 0, /** barcode tagged as AIM reserved * (eg, FNC1 after first character or digit pair) */ ZBAR_MOD_AIM, /** number of modifiers */ ZBAR_MOD_NUM, } zbar_modifier_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 d