virtual void paintTransparencyGroup(GfxState *state, double *bbox);
virtual void setSoftMask(GfxState *state, double *bbox, GBool alpha, Function *transferFunc, GfxColor *backdropColor);
virtual void clearSoftMask(GfxState *state);
virtual void paintTransparencyGroup(GfxState *state, double *bbox);
virtual void setSoftMask(GfxState *state, double *bbox, GBool alpha, Function *transferFunc, GfxColor *backdropColor);
virtual void clearSoftMask(GfxState *state);