
    <<ImagerPixelRow.mesa>>
        <<Copyright © 1984, 1985 by Xerox Corporation.  All rights reserved.>>
        <<Michael Plass, August 6, 1984 9:07:08 am PDT>>
        <<Doug Wyatt, March 7, 1985 2:41:44 pm PST>>

    DIRECTORY
        ImagerPixelMap USING [PixelMap, PixelMapRep],
        ImagerTransformation USING [Transformation];

    ImagerPixelRow: CEDAR DEFINITIONS
    ~ BEGIN

    PixelMap: TYPE ~ ImagerPixelMap.PixelMap;
    PixelMapRep: TYPE ~ ImagerPixelMap.PixelMapRep;
    Transformation: TYPE ~ ImagerTransformation.Transformation;

    Pixel: TYPE ~ CARDINAL;
    PixelRow: TYPE ~ REF PixelRowRep;
    PixelRowRep: TYPE ~ RECORD [
        sOrigin: INTEGER,
        fOrigin: INTEGER,
        fSize: NAT,
        pixel: SEQUENCE maxSize: NAT OF Pixel
        ];

    CreatePixelRow: PROC[sMin, fMin: INTEGER, fSize: NAT] RETURNS[new: PixelRow];

    ClearPixelRow: PROC[pixelRow: PixelRow];

    CopyPixelRow: PROC[pixelRow: PixelRow, scratch: PixelRow _ NIL] RETURNS[new: PixelRow];

    AddByColumn: PROC[dest, source: PixelRow];

    SubtractByColumn: PROC[dest, source: PixelRow];

    LoadPixelRow: PROC[pixelRow: PixelRow, source: PixelMap];

    StorePixelRow: PROC[pixelRow: PixelRow, dest: PixelMap];

    TransferSamples: PROC[dest, source: PixelMap, transformation: Transformation, tile: BOOLEAN _ FALSE, multiplier: CARDINAL _ 1, 
    lgScale: INTEGER _ 0];

    UnderSample: PROC[pixelMap: PixelMap, transformation: Transformation, tile: BOOLEAN _ FALSE, background: CARDINAL _ 0, scratch: REF 
    PixelMapRep _ NIL] RETURNS [PixelMap];

    BoxFilter: PROC[pixelMap: PixelMap, sSizeBox, fSizeBox: NAT];
        BoxTooBig: ERROR;

    ChangeBitsPerPixel: PROC[pixelMap: PixelMap, newLgBitsPerPixel: [0..4], scratch: REF PixelMapRep _ NIL] RETURNS[PixelMap];

    Renormalize: PROC[pixelMap: PixelMap, oldmin, oldmax, newmin, newmax: REAL];


    END.