Added ImageOptions for use with the GDAL plugin

include/osgDB/ImageOptions

@@ -0,0 +1,114 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef OSGDB_IMAGEOPTIONS
+#define OSGDB_IMAGEOPTIONS 1
+
+#include <osgDB/ReaderWriter>
+
+namespace osgDB {
+
+class OSGDB_EXPORT ImageOptions : public osgDB::ReaderWriter::Options
+{
+    public:
+    
+        ImageOptions();
+        
+        ImageOptions(const std::string& str);
+            
+        /** RatioWindow stores the window (as ratios of 0.0 to 1.0) from the overall imagery from which to extract the osg::Image*/
+        struct RatioWindow
+        {
+            RatioWindow():
+                windowX(0.0),
+                windowY(0.0),
+                windowWidth(1.0),
+                windowHeight(1.0) {}
+
+            void set(double x, double y, double w, double h)
+            {
+                windowX = x;
+                windowY = y;
+                windowWidth = w;
+                windowHeight = h;
+            }
+            
+            double windowX;
+            double windowY;
+            double windowWidth;
+            double windowHeight;
+        };
+        
+        /** PixelWindow stores the window (in exact pixels) from the overall imagery from which to extract the osg::Image*/
+        struct PixelWindow
+        {
+            PixelWindow():
+                windowX(0),
+                windowY(0),
+                windowWidth(0),
+                windowHeight(0) {}
+        
+            void set(unsigned int x, unsigned int y, unsigned int w, unsigned int h)
+            {
+                windowX = x;
+                windowY = y;
+                windowWidth = w;
+                windowHeight = h;
+            }
+            
+            unsigned int windowX;
+            unsigned int windowY;
+            unsigned int windowWidth;
+            unsigned int windowHeight;
+        };
+        
+        enum ImageWindowMode
+        {
+            ALL_IMAGE,
+            RATIO_WINDOW,
+            PIXEL_WINDOW
+        };
+        
+        enum ImageSamplingMode
+        {
+            NEAREST,
+            LINEAR,
+            CUBIC
+        };
+
+        // source        
+        ImageSamplingMode   _sourceImageSamplingMode;
+        ImageWindowMode     _sourceImageWindowMode;
+        RatioWindow         _sourceRatioWindow;
+        PixelWindow         _sourcePixelWindow;
+        
+        
+
+        // destination
+        osg::ref_ptr<osg::Image> _destinationImage;
+
+        ImageWindowMode     _destinationImageWindowMode;
+        RatioWindow         _destinationRatioWindow;
+        PixelWindow         _destinationPixelWindow;
+        
+        GLenum              _destinationDataType;
+        GLenum              _destinationPixelFormat;
+        
+        void init();
+        
+};
+
+
+}
+
+#endif // OSGDB_IMAGEOPTIONS

src/osgDB/ImageOptions.cpp

@@ -0,0 +1,25 @@
+#include <osgDB/ImageOptions>
+
+
+using namespace osgDB;
+
+
+ImageOptions::ImageOptions()
+{
+    init();
+}
+
+ImageOptions::ImageOptions(const std::string& str)
+{
+    init();   
+    _str = str;
+}
+
+
+void ImageOptions::init()
+{
+    _sourceImageSamplingMode = NEAREST;
+    _sourceImageWindowMode = ALL_IMAGE;
+    
+    _destinationImageWindowMode = ALL_IMAGE;
+}