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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_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);
}
} // namespace zbar
#endif
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