[Cyan]<Imaging>II>IIDitheredDevicePrivate.mesa!1

ImagerDitheredDevicePrivate.mesa

Michael Plass, June 25, 1985 2:03:24 pm PDT

Private interface for the benefit of ImagerOps.

DIRECTORY

IIColorDefs USING [SampledColor],

IIDitheredDevice USING [MapEntries],

IIDither USING [PackedColorDesc, Table],

IIPixelMap USING [PixelMap],

IISample USING [Sampler, SampleBuffer],

IITransformation USING [Transformation],

PrincOps USING [BitBltFlags],

Terminal USING [Virtual]

;

IIDitheredDevicePrivate: CEDAR DEFINITIONS

~ BEGIN

Case: TYPE ~ {nil, constant, stipple, rgb, sampled};

StippleArray: TYPE ~ PACKED ARRAY [0..16) OF WORD;

Data: TYPE ~ REF DataRep;

DataRep: TYPE ~ RECORD[

terminal: Terminal.Virtual ← NIL,

frame: IIPixelMap.PixelMap,

mapEntries: IIDitheredDevice.MapEntries ← NIL,

table: IIDither.Table ← NIL,

case: Case ← nil, -- what type of color

zerosAreClear: BOOL ← FALSE, -- special case for sampled black clear.

flags: PrincOps.BitBltFlags ← [], -- bitblt flags

grayWord: WORD ← 0, -- bitblt gray word

packedRGB: WORD ← 0, -- for case = rgb

stipple: StippleArray ← ALL[0], -- stipple pattern

fTileOrg: NAT ← 0,

sTileOrg: NAT ← 0,

sampledColor: IIColorDefs.SampledColor ← NIL, -- sampled color

sampledColorData: SampledColorData ← NIL, -- cached data associated with sampledColor

paToDevice: IITransformation.Transformation ← NIL, -- transformation from pa coords to display

sampBuffer: IISample.SampleBuffer ←, -- scan line buffer for samples

lineBuffer: IISample.SampleBuffer ←, -- for ops that cannot go directly to frame

sampler: IISample.Sampler ←, -- sampler information

extras: REF ← NIL

];

SampledColorData: TYPE ~ REF SampledColorDataRep;

SampledColorDataRep: TYPE ~ RECORD [

packing: IIDither.PackedColorDesc,

source: IIPixelMap.PixelMap -- 16 bits per pixel, packed RGB, with space for tile index.

];

END.