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authorRoy Ben Shabat <Roy.mail.net@gmail.com>2019-04-08 00:44:51 +0300
committerRoy Ben Shabat <Roy.mail.net@gmail.com>2019-04-08 00:44:51 +0300
commit08dd6000fe3a218221003876a699f448835b62e4 (patch)
tree6ef67384b80cd8176a4a2de8d09fae103a092357 /Software/External_Repositories/ZBar/include/zbar/Image.h
parent3254beb8358745efc6988df3d52a24fcb858fcdd (diff)
downloadTango-08dd6000fe3a218221003876a699f448835b62e4.tar.gz
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+//------------------------------------------------------------------------
+// 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