DIRECTORY Basics, BasicTime, Buttons, ColorDisplayFace, FS, Histograms, IdleBackdoor, Imager, ImagerBox, ImagerColor, ImagerColorMap, ImagerDitherContext, ImagerFont, ImagerInterpress, ImagerPixelMap, ImagerTerminal, IO, Menus, PaintPM, PrincOps, Process, Random, Real, RealFns, Rope, Terminal, ThisMachine, TIPUser, UserProfile, Vector2, ViewerClasses, ViewerOps;

ColorKal: CEDAR MONITOR
IMPORTS Basics, BasicTime, Buttons, ColorDisplayFace, FS, IdleBackdoor, Imager, ImagerBox, ImagerColor, ImagerColorMap, ImagerDitherContext, ImagerFont, ImagerInterpress, ImagerPixelMap, ImagerTerminal, IO, PaintPM, Process, Random, Real, RealFns, Rope, Terminal, ThisMachine, UserProfile =

{

ROPE: TYPE = Rope.ROPE;
Viewer: TYPE = ViewerClasses.Viewer;
PixelMap: TYPE = ImagerPixelMap.PixelMap;
Font: TYPE = ImagerFont.Font;
ConstantColor: TYPE = Imager.ConstantColor;
ColorMap: TYPE = PaintPM.ColorMap;
ColorSequence: TYPE = PaintPM.ColorSequence;
ColorMapEntryList: TYPE = LIST OF ImagerColorMap.MapEntry;

PixelBits: TYPE = [2 .. 8];
Direction: TYPE = {forward, backward};

Generator: TYPE = REF GeneratorRep;
GeneratorRep: TYPE = RECORD [a, b, c, countLow, countHigh, lastC: CARDINAL];

TextData: TYPE = RECORD [
texts: TextList,
numTexts: NAT,
totalProbability: REAL];

TextList: TYPE = LIST OF Text;
Text: TYPE = RECORD [
text: ROPE,
bounds: Imager.Box,
cumProb: REAL
];

Control: TYPE = REF ControlPrivate;
ControlPrivate: TYPE = RECORD [
shouldGo: BOOL _ FALSE,
direction: Direction _ forward,
ipSize: REAL--meters-- _ Imager.metersPerInch*3.0,
wantIP, wantFlip, hold: BOOL _ FALSE,
BitsPerPixel: PixelBits _ 4,
symmetry: CARDINAL _ 8,
periodLow: CARDINAL _ 10000,
periodHigh: CARDINAL _ 10000,
persistence: CARDINAL _ 5000,
halfBMin: INTEGER _ (LAST[CARDINAL]-2000)/2,
halfBMax: INTEGER _ (LAST[CARDINAL]-1500)/2,
halfCMin: INTEGER _ 0,
halfCMax: INTEGER _ (LAST[CARDINAL]-1)/2,
upTextMin: Milliseconds _ 10*OneSecond,
upTextMax: Milliseconds _ 60*OneSecond,
downTextMin: Milliseconds _ 1*OneSecond,
downTextMax: Milliseconds _ 6*OneSecond,
doText: BOOL _ TRUE,
xStateB: Generator _ NEW [GeneratorRep _ [1, 65536-1849, 3, , , ]],
xStateE: Generator _ NEW [GeneratorRep],
yStateB: Generator _ NEW [GeneratorRep _ [1, 65536-1809, 3, , , ]],
yStateE: Generator _ NEW [GeneratorRep],
cStateB: Generator _ NEW [GeneratorRep _ [1, 65536-1889, 3, , , ]],
cStateE: Generator _ NEW [GeneratorRep],
pausePeriod: Process.Ticks _ 0,
holdPeriod: Process.Ticks _ Process.MsecToTicks[500],
erase: BOOL _ TRUE,
runningPriority: Process.Priority _ Process.priorityBackground,
AtATime: NAT _ 64,
retraces: NAT _ 1
];

td: TextData;
font: Font _ NIL;
rs: Random.RandomStream _ Random.Create[seed: -1];

Milliseconds: TYPE = INT;
OneSecond: Milliseconds = 1000;

Root3Quarters: REAL _ RealFns.SqRt[0.75];

black: Imager.Color _ Imager.black;
white: Imager.Color _ Imager.white;

going: BOOL _ FALSE;
machineName: ROPE _ ThisMachine.Name[];
ctl: Control _ NEW [ControlPrivate _ []];

ButtonControl: PROC [parent: REF ANY, clientData: REF ANY _ NIL, mouseButton: Menus.MouseButton _ red, shift, control: BOOL _ FALSE] =
BEGIN OPEN ctl;
SELECT control FROM
FALSE => {
shouldGo _ NOT going;
IF shouldGo AND OKToGo[] THEN {
symmetry _ SELECT shift FROM
FALSE => 8,
TRUE => 12,
ENDCASE => ERROR;
BitsPerPixel _ SELECT mouseButton FROM red => 8, yellow => 4, blue => 4, ENDCASE => ERROR;
TRUSTED {Process.Detach[FORK Viewit[]]};
};
};
TRUE => {
SELECT mouseButton FROM
red => wantIP _ TRUE;
yellow => wantFlip _ TRUE;
blue => hold _ NOT hold;
ENDCASE => ERROR;
};
ENDCASE => ERROR;
END;

StopGoing: ENTRY PROC = {going _ FALSE};
OKToGo: ENTRY PROC RETURNS [go: BOOL] = {IF go _ NOT going THEN going _ TRUE};

StopViewing: PROC RETURNS [BOOL] =
{OPEN ctl; RETURN [NOT shouldGo]};

Kalidle: PROC [parent: REF ANY, clientData: REF ANY _ NIL, mouseButton: Menus.MouseButton _ red, shift, control: BOOL _ FALSE] = {
OPEN ctl;
symmetry _ SELECT shift FROM
FALSE => 8,
TRUE => 12,
ENDCASE => ERROR;
BitsPerPixel _ SELECT mouseButton FROM red => 8, yellow => 4, blue => 4, ENDCASE => ERROR --8--;
[] _ IdleBackdoor.UseAlternateVT[vtProc: DoForVT, logout: NOT control];
};

vtContext: Imager.Context;
vtPM: PixelMap;
curMap: ColorMap _ NIL;
curList: ColorMapEntryList _ NIL;

GiveVTContext: PROC [to: PROC [context: Imager.Context, pm: PixelMap]] =
{to[vtContext, vtPM]};

Viewit: PROC = {
OPEN ctl;
TRUSTED {
Process.SetPriority[runningPriority];
};
VTWork[Terminal.Current[], StopViewing !UNWIND => StopGoing[]];
StopGoing[];
};

DoForVT: PROC [vt: Terminal.Virtual] = {
context: Imager.Context;
vt.Select[];
[] _ vt.SetBWBitmapState[allocated];
[] _ vt.SetBWBitmapState[displayed];
context _ ImagerTerminal.BWContext[vt: vt, pixelUnits: TRUE];
Imager.SetColor[context, Imager.white];
Imager.MaskRectangle[context, [0, 0, vt.bwWidth, vt.bwHeight]];
VTWork[vt, KeyTyped];
};

KeyTyped: PROC RETURNS [stop: BOOL] = {
stop _ IdleBackdoor.KeyTyped[IdleBackdoor.defaultKeyFilter]};

useImagerDitherContext: BOOL _ TRUE;
useImagerColorMap: BOOL _ TRUE;

VTWork: PROC [vt: Terminal.Virtual, Stop: PROC RETURNS [BOOL]] = {
OPEN ctl;
SimpleSet: PROC [a, b: Terminal.ChannelValue _ 0, red, green, blue: Terminal.ColorValue, shared: BOOL _ TRUE] = {
Terminal.SetColor[vt: vt, aChannelValue: a, bChannelValue: b, red: red, green: green, blue: blue];
};
WithContext: PROC = {
IF useImagerColorMap THEN ImagerColorMap.Change[vt, WithVT] ELSE WithVT[SimpleSet];
};
WithVT: PROC [set: ImagerColorMap.MapProc] = {
vt _ vt;
FOR cml: ColorMapEntryList _ curList, cml.rest WHILE cml # NIL DO
set[a: cml.first.mapIndex, b: 0, red: cml.first.red, green: cml.first.green, blue: cml.first.blue];
ENDLOOP;
vt _ vt;
Dewit[giveContext: GiveVTContext, xp0: 0, yp0: 0, xp1: vtPM.fSize, yp1: vtPM.sSize, bpp: BitsPerPixel, Stop: Stop, vt: vt, entries: curMap];
vt _ vt;
};
[vtContext, vtPM] _ StartDeviceAndPM[vt, BitsPerPixel];
[curList, curMap] _ DefineColorMap[BitsPerPixel];
IF useImagerDitherContext THEN ImagerDitherContext.DoWithDitherMap[context: vtContext, mapEntries: curList, action: WithContext] ELSE WithContext[];
};

SampleMap: PROC [bpp: NAT, offset: NAT _ 0] = {
square: NAT _ TwoToThe[bpp];
side: NAT _ TwoToThe[bpp/2];
IF bpp # TwoToThe[vtPM.refRep.lgBitsPerPixel] THEN ERROR;
FOR s: NAT IN [0 .. vtPM.sSize) DO
FOR f: NAT IN [0 .. vtPM.fSize) DO
index: NAT _ ((s*side/vtPM.sSize) + (f*side/vtPM.fSize)*side + offset) MOD square;
ImagerPixelMap.PutPixel[vtPM, s+vtPM.sMin, f+vtPM.fMin, index];
ENDLOOP;
Process.CheckForAbort[];
ENDLOOP;
};

upText, downText, T: Milliseconds _ 0;
curText: Text;
cto: Vector2.VEC;
cts: REAL;

FloorLog2: PROC [n: CARDINAL] RETURNS [log: INTEGER] = {
log _ SELECT n FROM
<      1B =>  ERROR,
<      2B =>  0,
<      4B =>  1,
<     10B =>  2,
<     20B =>  3,
<     40B =>  4,
<    100B =>  5,
<    200B =>  6,
<    400B =>  7,
<   1000B =>  8,
<   2000B =>  9,
<   4000B => 10,
<  10000B => 11,
<  20000B => 12,
<  40000B => 13,
< 100000B => 14,
ENDCASE =>  15};

TwoToThe: ARRAY [0 .. 15] OF CARDINAL = [
00001H, 00002H, 00004H, 00008H,
00010H, 00020H, 00040H, 00080H,
00100H, 00200H, 00400H, 00800H,
01000H, 02000H, 04000H, 08000H];

Advance: PROC [gen: Generator] = TRUSTED {
OPEN ctl;
gen.a _ Basics.BITXOR[gen.a + gen.b, gen.b];
IF (gen.countLow _ gen.countLow - 1) = 0 THEN {
gen.b _ Basics.BITXOR[gen.b + gen.c, gen.c];
gen.countLow _ periodLow;
IF (gen.countHigh _ gen.countHigh - 1) = 0 THEN {
rs _ Random.Create[seed: gen.c];
[] _ rs.NextInt[];
gen.lastC _ gen.c;
gen.c _ rs.ChooseInt[0, halfCMax]*2+1;
gen.countHigh _ periodHigh;
};
};
};

Retard: PROC [gen: Generator] = TRUSTED {
OPEN ctl;
IF gen.countLow = periodLow THEN {
IF gen.countHigh = periodHigh THEN {
gen.countHigh _ 0;
gen.c _ gen.lastC;
rs _ Random.Create[seed: gen.c];
[] _ rs.NextInt[]; --actually, we'd like PrevInt, but can't have it...
gen.lastC _ rs.ChooseInt[0, halfCMax]*2+1;
};
gen.countHigh _ gen.countHigh + 1;
gen.countLow _ 0;
gen.b _ CARDINAL[Basics.BITXOR[gen.b, gen.c]] - gen.c;
};
gen.countLow _ gen.countLow + 1;
gen.a _ CARDINAL[Basics.BITXOR[gen.a, gen.b]] - gen.b;
};

Dewit: PROC [giveContext: PROC [to: PROC [context: Imager.Context, pm: PixelMap]], xp0, yp0, xp1, yp1, bpp: INTEGER, Stop: PROC RETURNS [BOOL], vt: Terminal.Virtual, entries: ColorMap] = {
OPEN ctl;
sMin, fMin: INTEGER;	--bounds of used area
sMid, fMid: INTEGER;	--center of used area
radius: LONG CARDINAL;	--of used area
radiusTimesRootThreeQuarters: LONG CARDINAL;
max: INTEGER;	--maximum z - zmin
valMax: LONG CARDINAL _ TwoToThe[bpp] - 1;
PickText: PROC [T: Milliseconds] = {
p: REAL _ Choose[0, td.totalProbability*0.999];
tl: TextList;
FOR tl _ td.texts, tl.rest WHILE p > tl.first.cumProb DO NULL ENDLOOP;
curText _ tl.first;
upText _ T + rs.ChooseInt[upTextMin, upTextMax];
downText _ upText + rs.ChooseInt[downTextMin, downTextMax];
cts _ (xp1 - xp0)/(curText.bounds.xmax - curText.bounds.xmin)/2;
cto _ [
x: Choose[
xp0 - cts*curText.bounds.xmin,
xp1 - cts*curText.bounds.xmax],
y: Choose[
yp0 - cts*curText.bounds.ymin,
yp1 - cts*curText.bounds.ymax]];
};
DrawText: PROC [context: Imager.Context, pm: PixelMap] = {
InnerDoit: PROC = {
context.SetXY[cto];
context.TranslateT[cto];
context.ScaleT[cts];
context.SetFont[font];
context.ShowRope[curText.text];
};
Imager.DoSave[context, InnerDoit];
};
pmBounds: DeviceBounds;
DeviceBounds: TYPE = RECORD [sMin, fMin, sMax, fMax: INTEGER];
Spots: PROC [pm: PixelMap, u, v, val: CARDINAL] _ SELECT symmetry FROM 8 => Spots8, 12 => Spots12, ENDCASE => ERROR;
Spots8: PROC [pm: PixelMap, u, v, val: CARDINAL] = TRUSTED {
ur: NAT _ Basics.HighHalf[radius*u];
vr: NAT _ Basics.HighHalf[radius*v];
IF ur < vr THEN {
cur: NAT _ max - ur;
cvr: NAT _ max - vr;
ImagerPixelMap.PutPixel[pm, sMin+ vr, fMin+ ur, val];
ImagerPixelMap.PutPixel[pm, sMin+cvr, fMin+ ur, val];
ImagerPixelMap.PutPixel[pm, sMin+ vr, fMin+cur, val];
ImagerPixelMap.PutPixel[pm, sMin+cvr, fMin+cur, val];
ImagerPixelMap.PutPixel[pm, sMin+ ur, fMin+ vr, val];
ImagerPixelMap.PutPixel[pm, sMin+cur, fMin+ vr, val];
ImagerPixelMap.PutPixel[pm, sMin+ ur, fMin+cvr, val];
ImagerPixelMap.PutPixel[pm, sMin+cur, fMin+cvr, val];
};
};
Spots12: PROC [pm: PixelMap, u, v, val: CARDINAL] = TRUSTED {
vh: CARDINAL _ Basics.BITSHIFT[v, -1];
ur: NAT _ Basics.HighHalf[radius*u];
vr: NAT _ Basics.HighHalf[radius*vh];
urH: NAT _ Basics.BITSHIFT[ur, -1];
vrH: NAT _ Basics.BITSHIFT[vr, -1];
urRTQ: NAT _ Basics.HighHalf[radiusTimesRootThreeQuarters*u];
vrRTQ: NAT _ Basics.HighHalf[radiusTimesRootThreeQuarters*vh];
IF v < u THEN {OPEN IPME: ImagerPixelMap;
IPME.PutPixel[pm, sMid+vrRTQ,	fMid+ur   - vrH,	val];
IPME.PutPixel[pm, sMid+vrRTQ,	fMid-ur   + vrH,	val];
IPME.PutPixel[pm, sMid-vrRTQ,	fMid+ur   - vrH,	val];
IPME.PutPixel[pm, sMid-vrRTQ,	fMid-ur   + vrH,	val];
IPME.PutPixel[pm, sMid+urRTQ - vrRTQ, fMid+urH + vrH,	val];
IPME.PutPixel[pm, sMid+urRTQ - vrRTQ, fMid-urH - vrH,	val];
IPME.PutPixel[pm, sMid-urRTQ + vrRTQ, fMid+urH + vrH,	val];
IPME.PutPixel[pm, sMid-urRTQ + vrRTQ, fMid-urH - vrH,	val];
IPME.PutPixel[pm, sMid+urRTQ,	fMid+urH - vr,	val];
IPME.PutPixel[pm, sMid+urRTQ,	fMid-urH + vr,	val];
IPME.PutPixel[pm, sMid-urRTQ,	fMid+urH - vr,	val];
IPME.PutPixel[pm, sMid-urRTQ,	fMid-urH + vr,	val];
};
};
SetBounds: PROC [pm: PixelMap] = {
dr: ImagerPixelMap.DeviceRectangle _ pm.BoundedWindow[];
pmBounds _ [sMin: dr.sMin, fMin: dr.fMin, sMax: dr.sMin + dr.sSize - 1, fMax: dr.fMin + dr.fSize - 1];
};
DrawInit: PROC [context: Imager.Context, pm: PixelMap] = {
Imager.SetColor[context, PickColor[context, entries, 0]];
Imager.MaskRectangle[context, [xp0, yp0, xp1 - xp0, yp1 - yp0]];
SetBounds[pm];
FOR i: CARDINAL IN [1 .. persistence] DO
Advance[xStateB];
Advance[yStateB];
Advance[cStateB];
Spots[pm, xStateB.a, yStateB.a, Basics.HighHalf[valMax*cStateB.a] + 1];
ENDLOOP;
};
DrawFinal: PROC [context: Imager.Context, pm: PixelMap] = {
SetBounds[pm];
IF erase THEN FOR i: CARDINAL IN [1 .. persistence] DO
Advance[xStateE];
Advance[yStateE];
Advance[cStateE];
Spots[pm, xStateE.a, yStateE.a, 0];
ENDLOOP;
};
prevUp: BOOL _ FALSE;
DrawDelta: PROC [context: Imager.Context, pm: PixelMap] = {
shouldUp: BOOL _ (T >= upText) AND (T < downText);
SetBounds[pm];
IF wantIP THEN {
ipm: ImagerInterpress.Ref = ImagerInterpress.Create["ColorKal.ip"];
scale: REAL = ipSize/MAX[pm.sSize, pm.fSize];
PaintIt: PROC [context: Imager.Context] = {
PaintPM.PaintPixelMap[context, pm, curMap, 0];
};
wantIP _ FALSE;
ipm.DoPage[PaintIt, scale];
ipm.Close[];
};
SELECT direction FROM
forward => {
THROUGH [0 .. AtATime) DO
IF erase THEN {
Advance[xStateE]; Advance[yStateE]; Advance[cStateE];
Spots[pm, xStateE.a, yStateE.a, 0];
};
Advance[xStateB]; Advance[yStateB]; Advance[cStateB];
Spots[pm, xStateB.a, yStateB.a, Basics.HighHalf[valMax*cStateB.a] + 1];
ENDLOOP;
};
backward => {
THROUGH [0 .. AtATime) DO
Spots[pm, xStateB.a, yStateB.a, 0];
Retard[xStateB]; Retard[yStateB]; Retard[cStateB];
IF erase THEN {
Spots[pm, xStateE.a, yStateE.a, Basics.HighHalf[valMax*cStateE.a] + 1];
Retard[xStateE]; Retard[yStateE]; Retard[cStateE];
};
ENDLOOP;
};
ENDCASE => ERROR;
IF doText AND shouldUp # prevUp THEN {
index: NAT _ rs.ChooseInt[1, entries.length-1];
Imager.SetColor[context, PickColor[context, entries, IF shouldUp THEN index ELSE 0]];
DrawText[context, pm];
prevUp _ shouldUp;
};
IF T >= downText THEN PickText[T];
};
oldP: BasicTime.Pulses;
SELECT symmetry FROM
8 => radius _ MIN[xp1 - xp0, yp1 - yp0]/2;
12 => radius _ MIN[xp1 - xp0, Real.FixC[(yp1 - yp0)/Root3Quarters]]/2;
ENDCASE => ERROR;
max _ radius*2 - 1;
sMin _ yp0 + (yp1 - yp0 - (max+1))/2;
fMin _ xp0 + (xp1 - xp0 - (max+1))/2;
sMid _ (yp0 + yp1)/2;
fMid _ (xp0 + xp1)/2;
radiusTimesRootThreeQuarters _ Real.RoundC[Root3Quarters*radius];
PickText[T _ 0];
RandomizeB[];
xStateB.countLow _ periodLow;
yStateB.countLow _ periodLow;
cStateB.countLow _ periodLow;
xStateB.countHigh _ periodHigh;
yStateB.countHigh _ periodHigh;
cStateB.countHigh _ periodHigh;
xStateE^ _ xStateB^;
yStateE^ _ yStateB^;
cStateE^ _ cStateB^;
giveContext[DrawInit];
oldP _ BasicTime.GetClockPulses[];
FOR i: INT _ 0, i+1 WHILE NOT Stop[] DO
newP: BasicTime.Pulses;
IF wantFlip THEN {
direction _ SELECT direction FROM
forward => backward,
backward => forward,
ENDCASE => ERROR;
wantFlip _ FALSE;
};
IF hold THEN Process.Pause[holdPeriod] ELSE giveContext[DrawDelta];
IF pausePeriod # 0 THEN Process.Pause[pausePeriod];
FOR i: NAT IN [0 .. retraces) DO
Terminal.WaitForBWVerticalRetrace[vt];
ENDLOOP;
newP _ BasicTime.GetClockPulses[];
IF newP > oldP THEN {
Dt: Milliseconds _ BasicTime.PulsesToMicroseconds[newP - oldP]/1000;
T _ T + Dt};
oldP _ newP;
ENDLOOP;
giveContext[DrawFinal];
};

PickColor: PROC [context: Imager.Context, entries: ColorMap, index: NAT] RETURNS [color: ConstantColor] = {
color _ entries[index];
};

StartDeviceAndPM: PROC [vt: Terminal.Virtual, bpp: INT] RETURNS [context: Imager.Context, pm: PixelMap] = {
OPEN ctl;
fb: Terminal.FrameBuffer;
IF ColorDisplayFace.displayType = none THEN [] _ ColorDisplayFace.SetDisplayType[profiledDisplayType];
[] _ Terminal.SetColorBitmapState[vt: vt, newState: displayed, newMode: [full: FALSE, bitsPerPixelChannelA: bpp, bitsPerPixelChannelB: 0], newVisibility: aOnly];
context _ ImagerTerminal.ColorContext[vt: vt, pixelUnits: TRUE];
IF vt.GetColorMode[].bitsPerPixelChannelA # bpp THEN ERROR;
fb _ vt.GetColorFrameBufferA[];
pm _ FbPm[fb];
};

profiledDisplayType: ColorDisplayFace.ColorDisplayType;

FbPm: PROC [fb: Terminal.FrameBuffer] RETURNS [pm: PixelMap] = {
pm _ [
sOrigin: 0, fOrigin: 0,
sMin: 0, fMin: 0,
sSize: fb.height, fSize: fb.width,
refRep: NEW [ImagerPixelMap.PixelMapRep _ [
ref: fb.vm,
pointer: fb.base,
words: fb.vm.words,
lgBitsPerPixel: FloorLog2[fb.bitsPerPixel],
rast: fb.wordsPerLine,
lines: fb.height]]
];
IF fb.bitsPerPixel # TwoToThe[pm.refRep.lgBitsPerPixel] THEN ERROR;
};

DefineColorMap: PROC [bpp: PixelBits] RETURNS [list: ColorMapEntryList, seq: ColorMap] = {
OPEN ctl;
length: NAT = TwoToThe[bpp];
IF (cmLists[bpp] = NIL) # (cmSeqs[bpp] = NIL) THEN ERROR;
IF cmLists[bpp] # NIL THEN RETURN [cmLists[bpp], cmSeqs[bpp]];
seq _ MakeEntries[length];
list _ NIL;
FOR i: INT IN [0 .. length) DO
rgb: ImagerColor.RGB _ MapRound[i, bpp];
list _ CONS
[
[
mapIndex: i,
red: Floor[rgb.R*255.99],
green: Floor[rgb.G*255.99],
blue: Floor[rgb.B*255.99]
],
list
];
seq[i] _ ImagerColor.ColorFromRGB[rgb, cal];
ENDLOOP;
cmLists[bpp] _ list;
cmSeqs[bpp] _ seq;
};
cal: ImagerColor.RGBCalibration _ ImagerColor.GetDefaultCalibration[];
cmLists: ARRAY PixelBits OF ColorMapEntryList _ ALL[NIL];
cmSeqs: ARRAY PixelBits OF ColorMap _ ALL[NIL];


FixC: PROC [r: REAL] RETURNS [c: CARDINAL] = {c _ Real.FixC[r]};

MapRound: PROC [i, bpp: NAT] RETURNS [rgb: ImagerColor.RGB] = {
last: NAT _ TwoToThe[bpp]-1;
SELECT i FROM
 = 000 => rgb _ [0, 0, 0];
<= last => rgb _ ImagerColor.RGBFromHSV[[H: (i-1.0)/last, S: 1, V: 1]];
ENDCASE => ERROR};

MapCopy: PROC [i, bpp: NAT] RETURNS [c: ConstantColor] = {
c _ fromMap[i];
};
fromMap: ColorMap _ NIL;

MakeEntries: PROC [length: NAT] RETURNS [entries: ColorMap] =
{entries _ NEW[ColorSequence[length]]};

Floor: PROC [r: REAL] RETURNS [i: INT] = {
d: INT _ 1 - Real.Fix[r];
i _ Real.Fix[r+d]-d};

Ceiling: PROC [r: REAL] RETURNS [i: INT] = {
d: INT _ 1 + Real.Fix[r];
i _ Real.Fix[r-d]+d};

ReadTextData: PROC [fileName: ROPE] RETURNS [td: TextData] = {
OPEN ctl;
from: IO.STREAM _ FS.StreamOpen[fileName];
last: TextList _ NIL;
td _ [
texts: NIL,
numTexts: 0,
totalProbability: 0];
DO
prob: REAL;
text: ROPE;
this: TextList;
[] _ from.SkipWhitespace[];
IF from.EndOf[] THEN EXIT;
prob _ from.GetReal[];
text _ from.GetRopeLiteral[];
text _ Replace[text, "<machine name>", machineName];
td.numTexts _ td.numTexts + 1;
this _ LIST[ [
text: text,
bounds: ImagerBox.BoxFromExtents[font.RopeBoundingBox[text]],
cumProb: td.totalProbability _ td.totalProbability + prob] ];
IF last = NIL THEN td.texts _ this ELSE last.rest _ this;
last _ this;
ENDLOOP;
from.Close[];
};

Choose: PROC [min, max: REAL] RETURNS [r: REAL] =
{r _ min + (rs.ChooseInt[0, 10000]/1.0E4) * (max-min)};

Replace: PROC [in, what, with: ROPE] RETURNS [new: ROPE] = {
start, len: INT;
ousLen: INT _ what.Length[];
new _ in;
WHILE (start _ new.Index[s2: what]) < (len _ new.Length[]) DO
new _ new.Substr[len: start].Cat[with, new.Substr[start: start+ousLen, len: len - (start+ousLen)]];
ENDLOOP;
};

CreateButton: PROC = {
ctlButton _ Buttons.Create[info: [name: "cKal", column: static], proc: ButtonControl, documentation: "click to run/stop color kaleidoscope; left=8bpp, mid=4, right=2"];
};
ctlButton: Buttons.Button _ NIL;

RandomizeB: PROC = {
OPEN ctl;
DO
xStateB.b _ rs.ChooseInt[halfBMin, halfBMax]*2 + 1;
yStateB.b _ rs.ChooseInt[halfBMin, halfBMax]*2 + 1;
cStateB.b _ rs.ChooseInt[halfBMin, halfBMax]*2 + 1;
IF xStateB.b # yStateB.b AND cStateB.b # yStateB.b AND xStateB.b # cStateB.b THEN EXIT;
ENDLOOP;
};

RandomizeC: PROC = {
OPEN ctl;
xStateB.c _ rs.ChooseInt[halfCMin, halfCMax]*2 + 1;
yStateB.c _ rs.ChooseInt[halfCMin, halfCMax]*2 + 1;
cStateB.c _ rs.ChooseInt[halfCMin, halfCMax]*2 + 1;
};

NoteProfile: PROC [reason: UserProfile.ProfileChangeReason] --UserProfile.ProfileChangedProc-- = {
displayTypeRope: ROPE _ UserProfile.Token["ColorDisplay.Type", "640x480"];
profiledDisplayType _ SELECT TRUE FROM
displayTypeRope.Equal["1024x768", FALSE] => highResolution,
displayTypeRope.Equal["640x480", FALSE] => standard,
ENDCASE => standard;
};

Start: PROC = {
UserProfile.CallWhenProfileChanges[NoteProfile];
font _ ImagerFont.Find["Xerox/PressFonts/TimesRoman-MRR"];
td _ ReadTextData["Kal.texts"];
CreateButton[];
};

Start[];

}.
abcdefghijklmnopqrstuvwxyz1234567890-=\[]_;',./
ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%~&*()+|{}^:"<>?
abcdefghijklmnopqrstuvwxyz1234567890-=\[]_;',./
ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%~&*()+|{}^:"<>?
*ColorKal.Mesa
Copyright c 1984 by Xerox Corporation.  All rights reserved.
Last Edited by: Spreitzer, May 13, 1986 2:45:55 pm PDT
INVARIANT
going IFF there is a process running the kaleidoscope.
Code from 5.2:
dd: ImagerDisplay.DisplayData;
context _ Imager.Create[
SELECT bpp FROM
2 => $Std2bpp,
4 => $Std4bpp,
8 => $Std8bpp,
ENDCASE => ERROR];
Imager.ConcatT[context, Imager.Invert[context.state.T]];
dd _ NARROW[context.data];
pm _ dd.pix[0];
entries _ LoadMap[context, bpp, maps[bpp]];
Previously problematic in 6.0:
Works in 6.0, but gets Viewers in the way:
IF vt # Terminal.Current[] THEN ERROR;
ColorDisplay.SetColorDisplayStatus[on: TRUE, bpp: bpp];
LoadMap: PROC [vt: Terminal.Virtual, bpp: NAT] RETURNS [entries: ColorMap] = {
length: NAT _ TwoToThe[bpp];
entries _ MakeEntries[length];
FOR i: INT IN [0 .. length) DO
rgb: ImagerColor.RGB _ MapRound[i, bpp];
Terminal.SetColor[
vt: vt,
aChannelValue: i,
red: Floor[rgb.R*255.99],
green: Floor[rgb.G*255.99],
blue: Floor[rgb.B*255.99]
];
entries[i] _ ImagerColor.ColorFromRGB[rgb, cal];
ENDLOOP;
};
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