Add support for input rescaling:

- round extents to power of two.
- clamp max extents.
Add output options pimpl.
Other misc API changes.

src/nvtt/CompressRGB.h

@@ -19,21 +19,21 @@
 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-// OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef NV_TT_COMPRESSRGB_H
-#define NV_TT_COMPRESSRGB_H
-
-#include "nvtt.h"
-
-namespace nv
-{
-	class Image;
-
-	// Pixel format converter.
-	void compressRGB(const Image * image, const nvtt::OutputOptions & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
-	
-} // nv namespace
-
-
-#endif // NV_TT_COMPRESSDXT_H
+// OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef NV_TT_COMPRESSRGB_H
+#define NV_TT_COMPRESSRGB_H
+
+#include "nvtt.h"
+
+namespace nv
+{
+	class Image;
+
+	// Pixel format converter.
+	void compressRGB(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	
+} // nv namespace
+
+
+#endif // NV_TT_COMPRESSDXT_H