ios demo version

ios/ZBarSDK_old/Headers/ZBarSDK/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