enum OdDgMaterialLayerPatternType { kLayerUnknown = 0, kLayerNormal = 1, kLayerAdd = 2, kLayerSubtract = 3, kLayerAlpha = 4, kLayerGradient = 5, kLayerImage = 6, kLayerProcedure = 7, kLayerGamma = 8, kLayerTint = 9, kLayerGroupStart = 10, kLayerGroupEnd = 11, kLayerAlphaBgStart = 12, kLayerAlphaBgEnd = 13 };