Add ITexture::getOriginalColorFormat to access color format of images used to create a texture.

We already had the variable, just no access function.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5809 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,5 +1,6 @@
 --------------------------
 Changes in 1.9 (not yet released)
+- Add ITexture::getOriginalColorFormat to access color format of images used to create a texture
 - Add IMemoryReadFile interface which allows direct access to memory block used as file.
 - Add IReadFile::getType() interface to all users to find out what kind of class implements that interface.
 - .dae/Collada reader/writer now handle whitespace in texture-filenames with escape characters (handle them as xs:anyURI).

include/ITexture.h

@@ -226,6 +226,12 @@ public:
 	/** \return The color format of texture. */
 	ECOLOR_FORMAT getColorFormat() const { return ColorFormat; };
 
+	//! Get the original color format
+	/** When create textures from image data we will often use different color formats.
+	For example depending on driver TextureCreationFlag's. 
+	This can give you the original format which the image used to create the texture had	*/
+	ECOLOR_FORMAT getOriginalColorFormat() const { return OriginalColorFormat; };
+
 	//! Get pitch of the main texture (in bytes).
 	/** The pitch is the amount of bytes used for a row of pixels in a
 	texture.