DIRECTORYImagerPixelArray,RuntimeError USING [BoundsFault];ImagerPixelArrayImpl: CEDAR PROGRAMIMPORTS RuntimeErrorEXPORTS ImagerPixelArray~ BEGIN OPEN ImagerPixelArray;MaxSampleValue: PUBLIC PROC[pa: PixelArray, i: NAT] RETURNS[Val] ~ {RETURN pa.class.MaxSampleValue[pa, i];};GetSample: PUBLIC PROC[pa: PixelArray, s, f, i: NAT] RETURNS[Val] ~ {RETURN pa.class.GetSample[pa, s, f, i];};GetRow: PUBLIC PROC[pa: PixelArray, row: Row, s, f, i: NAT] ~ {pa.class.GetRow[pa, row, s, f, i];};EqTransformations: PROC[m, n: Transformation] RETURNS[BOOL] ~ {RETURN[m.a=n.a AND m.b=n.b AND m.c=n.c AND m.d=n.d AND m.e=n.e AND m.f=n.f];};JoinPixelArrays: PUBLIC PROC[pixelArrays: LIST OF PixelArray] RETURNS[PixelArray] ~ {sSize, fSize, samplesPerPixel: NAT _ 0;m: Transformation _ NIL;first: BOOL _ TRUE;FOR each: LIST OF PixelArray _ pixelArrays, each.rest UNTIL each=NIL DOpa: PixelArray ~ each.first;IF first THEN { sSize _ pa.sSize; fSize _ pa.fSize; m _ pa.m; first _ FALSE }ELSE IF pa.sSize=sSize AND pa.fSize=fSize AND EqTransformations[pa.m, m] THEN NULLELSE ERROR; -- incompatiblesamplesPerPixel _ samplesPerPixel+pa.samplesPerPixel;ENDLOOP;RETURN[NEW[PixelArrayRep _ [class: joinedClass, data: pixelArrays,sSize: sSize, fSize: fSize, samplesPerPixel: samplesPerPixel, m: m]]];};joinedClass: Class ~ NEW[ClassRep _ [type: $Joined,MaxSampleValue: JoinedMaxSampleValue,GetSample: JoinedGetSample,GetRow: JoinedGetRow]];JoinedMaxSampleValue: PROC[pa: PixelArray, i: NAT] RETURNS[Val] ~ {list: LIST OF PixelArray ~ NARROW[pa.data];IF i IN[0..pa.samplesPerPixel) THEN {k: NAT _ i;FOR each: LIST OF PixelArray _ list, each.rest UNTIL each=NIL DOslice: PixelArray ~ each.first;IF k<slice.samplesPerPixel THEN RETURN[MaxSampleValue[slice, k]]ELSE k _ k-slice.samplesPerPixel;ENDLOOP;ERROR;}ELSE ERROR RuntimeError.BoundsFault;};JoinedGetSample: PROC[pa: PixelArray, s, f, i: NAT _ 0] RETURNS[Val] ~ {list: LIST OF PixelArray ~ NARROW[pa.data];IF s IN[0..pa.sSize) AND f IN[0..pa.fSize) AND i IN[0..pa.samplesPerPixel) THEN {k: NAT _ i;FOR each: LIST OF PixelArray _ list, each.rest UNTIL each=NIL DOslice: PixelArray ~ each.first;IF k<slice.samplesPerPixel THEN RETURN[GetSample[slice, s, f, k]]ELSE k _ k-slice.samplesPerPixel;ENDLOOP;ERROR;}ELSE ERROR RuntimeError.BoundsFault;};JoinedGetRow: PROC[pa: PixelArray, row: Row, s, f, i: NAT _ 0] ~ {list: LIST OF PixelArray ~ NARROW[pa.data];IF s IN[0..pa.sSize) AND f IN[0..pa.fSize) AND i IN[0..pa.samplesPerPixel) THEN {k: NAT _ i;FOR each: LIST OF PixelArray _ list, each.rest UNTIL each=NIL DOslice: PixelArray ~ each.first;IF k<slice.samplesPerPixel THEN { GetRow[slice, row, s, f, k]; RETURN }ELSE k _ k-slice.samplesPerPixel;ENDLOOP;ERROR;}ELSE ERROR RuntimeError.BoundsFault;};END.   И  ImagerPixelArrayImpl.mesaCopyright c 1984, Xerox Corporation.  All rights reserved.Doug Wyatt, November 5, 1984 3:09:07 pm PSTЭ╩A  Ш ЪЬЩJЪЬ
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