From 02d0f08eb13f055719d0f5a42f9fc9d8c1e4352c Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 8 Dec 2009 15:38:50 +0000
Subject: [PATCH] Added virtual declaration for a range of osg::Image method to
 allow easier customization.

---
 include/osg/Image | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/osg/Image b/include/osg/Image
index f5fa39dc7..96094b50c 100644
--- a/include/osg/Image
+++ b/include/osg/Image
@@ -109,13 +109,13 @@ class OSG_EXPORT Image : public BufferData
 
 
         /** Allocate a pixel block of specified size and type. */
-        void allocateImage(int s,int t,int r,
+        virtual void allocateImage(int s,int t,int r,
                            GLenum pixelFormat,GLenum type,
                            int packing=1);
         
         
         /** Set the image dimensions, format and data. */
-        void setImage(int s,int t,int r,
+        virtual void setImage(int s,int t,int r,
                       GLint internalTextureformat,
                       GLenum pixelFormat,GLenum type,
                       unsigned char* data,
@@ -125,21 +125,21 @@ class OSG_EXPORT Image : public BufferData
         /** Read pixels from current frame buffer at specified position and size, using glReadPixels.
           * Create memory for storage if required, reuse existing pixel coords if possible.
         */
-        void readPixels(int x,int y,int width,int height,
+        virtual void readPixels(int x,int y,int width,int height,
                         GLenum pixelFormat,GLenum type);
             
 
         /** Read the contents of the current bound texture, handling compressed pixelFormats if present.
           * Create memory for storage if required, reuse existing pixel coords if possible.
         */
-        void readImageFromCurrentTexture(unsigned int contextID, bool copyMipMapsIfAvailable, GLenum type = GL_UNSIGNED_BYTE);
+        virtual void readImageFromCurrentTexture(unsigned int contextID, bool copyMipMapsIfAvailable, GLenum type = GL_UNSIGNED_BYTE);
 
 
         /** Scale image to specified size. */
         void scaleImage(int s,int t,int r) { scaleImage(s,t,r, getDataType()); }
 
         /** Scale image to specified size and with specified data type. */
-        void scaleImage(int s,int t,int r, GLenum newDataType);
+        virtual void scaleImage(int s,int t,int r, GLenum newDataType);
 
         /** Copy a source Image into a subpart of this Image at specified position.
           * Typically used to copy to an already allocated image, such as creating
@@ -148,7 +148,7 @@ class OSG_EXPORT Image : public BufferData
           * accomodate the source image in its offset position.
           * If source is NULL then no operation happens, this Image is left unchanged.
         */
-        void copySubImage(int s_offset, int t_offset, int r_offset, const osg::Image* source);
+        virtual void copySubImage(int s_offset, int t_offset, int r_offset, const osg::Image* source);
 
 
         enum Origin