From Ulrich Hertlein, "not sure how severe this is but I believe there's a bug in

Texture.cpp:applyTexImage2D_subload:

<code>
unsigned char* data = = (unsigned char*)image->data();
if (needImageRescale) {
 // allocates rescale buffer
 data = new unsigned char[newTotalSize];

 // calls gluScaleImage into the data buffer
}

const unsigned char* dataPtr = image->data();
// subloads 'dataPtr'

// deletes 'data'
</code>

In effect, the scaled data would never be used.

I've also replaced bits of duplicate code in Texture1D/2D/2DArray/3D/Cubemap/Rectangle
that checks if the texture image can/should be unref'd with common functionality in
Texture.cpp.

"

include/osg/Texture

@@ -805,10 +805,13 @@ class OSG_EXPORT Texture : public osg::StateAttribute
 
         virtual void computeInternalFormat() const = 0;
         
+        /** Computes the internal format from Image parameters. */
         void computeInternalFormatWithImage(const osg::Image& image) const;
 
+        /** Computes the texture dimension for the given Image. */
         void computeRequiredTextureDimensions(State& state, const osg::Image& image,GLsizei& width, GLsizei& height,GLsizei& numMipmapLevels) const;
         
+        /** Computes the internal format type. */
         void computeInternalFormatType() const;
 
         /** Helper method. Sets texture parameters. */
@@ -818,6 +821,11 @@ class OSG_EXPORT Texture : public osg::StateAttribute
           * glGenerateMipmapEXT() or GL_GENERATE_MIPMAP_SGIS are supported. */
         bool isHardwareMipmapGenerationEnabled(const State& state) const;
 
+        /** Returns true if the associated Image should be released and it's safe to do so. */
+        bool isSafeToUnrefImageData(const State& state) const {
+            return (_unrefImageDataAfterApply && state.getMaxTexturePoolSize()==0 && areAllTextureObjectsLoaded());
+        }
+
         /** Helper methods to be called before and after calling
           * gl[Compressed][Copy]Tex[Sub]Image2D to handle generating mipmaps. */
         GenerateMipmapMode mipmapBeforeTexImage(const State& state, bool hardwareMipmapOn) const;