[opengtl-commits] [286] add a constant function for reading image content

[subversion@xxxxxxxxxxxxx]

Revision: 286
Author:   cyrille
Date:     2008-07-02 00:17:46 +0200 (Wed, 02 Jul 2008)

Log Message:
-----------
add a constant function for reading image content

Modified Paths:
--------------
    trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.cpp
    trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.h


Modified: trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.cpp
===================================================================
--- trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.cpp	2008-07-01 22:17:27 UTC (rev 285)
+++ trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.cpp	2008-07-01 22:17:46 UTC (rev 286)
@@ -63,6 +63,16 @@
   }
 }
 
+const char* BufferImage::data( int _x, int _y ) const
+{
+  if( _x >= 0 and _y >= 0 and _x < d->width and _y < d->height )
+  {
+    return d->buffer->rawData() + (_x * pixelSize() + _y * lineWidth());
+  } else {
+    return d->defaultPixel;
+  }
+}
+
 int BufferImage::lineWidth() const
 {
   return d->lineWidth;

Modified: trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.h
===================================================================
--- trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.h	2008-07-01 22:17:27 UTC (rev 285)
+++ trunk/OpenGTL/OpenGTL/GTLCore/BufferImage.h	2008-07-01 22:17:46 UTC (rev 286)
@@ -44,6 +44,7 @@
       ~BufferImage();
     public:
       virtual char* data( int _x, int _y );
+      virtual const char* data( int _x, int _y ) const;
       /**
        * @return the width of the image
        */