+ inline void highlight(pixel32 *x, pixel32 *y, bool raised) const;
+ void reduceDepth(XImage *im, pixel32 *data) const;
+ void verticalGradient(Surface &sf, const RenderTexture &texture,
+ pixel32 *data) const;
+ void diagonalGradient(Surface &sf, const RenderTexture &texture,
+ pixel32 *data) const;
+ void crossDiagonalGradient(Surface &sf, const RenderTexture &texture,
+ pixel32 *data) const;
+ virtual void drawGradientBackground(Surface &sf,
+ const RenderTexture &texture) const;
+