mMatrix      = nsnull; mLocalClip.x = mLocalClip.y = mLocalClip.width = mLocalClip.height = 0; mClipRegion  = nsnull; mColor       = NS_RGB(0, 0, 0); mLineStyle   = nsLineStyle_kSolid; mFontMetrics = nsnull;
GraphicsState::GraphicsState(){    mMatrix      = nsnull;    mLocalClip.x = mLocalClip.y = mLocalClip.width = mLocalClip.height = 0;    mClipRegion  = nsnull;    mColor       = NS_RGB(0, 0, 0);    mLineStyle   = nsLineStyle_kSolid;    mFontMetrics = nsnull;}