DIRECTORY Scaled USING [Value];ImagerBasic: CEDAR DEFINITIONS= BEGINPair: TYPE = RECORD [x, y: REAL];IntPair: TYPE = RECORD [x, y: INTEGER];Edge: TYPE = RECORD [a, b: Pair];IntEdge: TYPE = RECORD [a, b: IntPair];Rectangle: TYPE = RECORD [x, y, w, h: REAL];IntRectangle: TYPE = RECORD [x, y, w, h: INTEGER];Bezier: TYPE = RECORD [b0, b1, b2, b3: Pair]; -- Bezier control points for a cubic curveTransformType: TYPE = { none, identity, rot90, rot180, rot270, mirrorX, mirrorY, mirror45Deg, mirror135Deg, hard };Transformation: TYPE = RECORD [ -- a transformation matrixa, b, c, d, e, f: REAL, -- matrix elementstype: TransformType -- identifies special matrix forms];Visibility: TYPE = {visible, partlyVisible, invisible};Path: TYPE = REF PathRep;PathRep: TYPE = RECORD [generateProc: PROC [path: Path,move: PROC [Pair],line: PROC [Pair],curve: PROC [Pair, Pair, Pair]],data: REF ANY];StrokeEnds: TYPE =  {butt, square, round};Color: TYPE = REF;CIEColor: TYPE = REF CIEColorRep;CIEColorRep: TYPE = RECORD [x, y, Y: CARDINAL];SampledColor: TYPE = REF SampledColorRep;SampledColorRep: TYPE = RECORD [transparent: BOOLEAN, -- are 0 samples white (false) or transparent (true)?pa: PixelArray, -- the array of samplesm: Transformation, -- transforms from pa to device coordinatescolorMap: ATOM -- maps samples into colors];PixelArray: TYPE = REF PixelArrayRep;PixelArrayRep: TYPE = RECORD [xPixels, yPixels: INT, -- dimensions of the array, in pixels, in standard coordinates ((0, 0) at lower left, y increasing upwards, x increasing to the right).maxSampleValue: INT, -- the range of sample values is [0..maxSampleValue]samplesPerPixel: INT, -- number of samples for each pixelget: PROC [self: PixelArray,buffer: PixelBuffer,nSamples: NAT,layer: INT,xStart, yStart: Scaled.Value,xDelta, yDelta: Scaled.Value],data: REF ANY];PixelBuffer: TYPE = REF PixelBufferRep;PixelBufferRep: TYPE = RECORD [SEQUENCE maxLength: NAT OF CARDINAL];END.  Д  ImagerBasic.mesaThis interface provides the public data structures shared by clients and the Imager.Last Edited by:Crow, Plass, Wyatt, July 6, 1983 2:38 pmBasic Definitions (Numbers and Shapes)TransformationsThe form of the complete transformation matrix is:a	d	0b	e	0c	f	1ClippingPathsA client of the Imager may keep a path representation in a form appropriate for its own use; it only needs to unravel it into a series of MoveTo, LineTo and CurveTo operations when it is asked.MasksColorsCIE Chromaticity coordinatesPixelArraysobject implementation fills this with the requested number of samples.number of samples to put in buffer.in the range [0..samplesPerPixel)position of first sample.increment to get to successive samples.for use by the get proc; some devices may discriminate on this REF to get at the representation directly, if they are able to recognize it.Э╩Ц  Ш headЪЬЩJЩTJЩ ЪЬЩJЪЬ(Щ(ЧIunitЪ╧k	ЬЭЬ	ШЧhead2ЪЬЭЬЭШJЪЬЭШЧhead3Ъ╧b&Щ&JЪЬЭЬЭЬЭЬШ!JЪЬ	ЭЬЭЬЭЬШ'JЪЬЭЬЭЬШ!JЪЬ	ЭЬЭЬШ'JЪЬЭЬЭЬЭЬШ,JЪЬЭЬЭЬЭЬШ2JЪЬЭЬЭЬ╧c*ШXЧЪЮЩJЪЬЭЬ`ШsJШ ЪЬЭЬЭЬЯШ:JЪЬЭЬЯШ*JЪЬЯ"Ш6JЪЬШЩ2JЪЬЩJЪЬЩJЪЬЩЧЧЧЪЮЩLЪЬЭЬ'Ш7ЧЪЮЩJЪЬ┴Щ┴LЪЬЭЬЭЬ	ШЪЬ	ЭЬЭЬШЪЬЭЬШJЪЬШJЪЬЭЬШJЪЬЭЬШJЪЬЭЬШJЪЬШЧJЪЬЭЬЭШJЪЬШЧЧЪЮЩLЪЬЭЬШ*ЧЪЮЩLЪЬЭЬЭЬШJШ JЪЬ
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