170 lines
4.0 KiB
ObjectPascal
170 lines
4.0 KiB
ObjectPascal
unit BucketFillerThread;
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interface
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uses
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Classes, Windows,
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ControlPoint, Render;
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type
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TBucketFillerThread = class(TThread)
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private
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fcp: TControlPoint;
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points: TPointsArray;
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public
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nrbatches: integer;
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batchcounter: Pinteger;
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BucketWidth: Int64;
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BucketHeight: Int64;
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bounds: array[0..3] of extended;
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size: array[0..1] of extended;
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RotationCenter: array[0..1] of extended;
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Buckets: PBucketArray;
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ColorMap: TColorMapArray;
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CriticalSection: TRTLCriticalSection;
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constructor Create(cp: TControlPoint);
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destructor Destroy; override;
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procedure Execute; override;
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procedure AddPointsToBuckets(const points: TPointsArray); overload;
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procedure AddPointsToBucketsAngle(const points: TPointsArray); overload;
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end;
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implementation
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{ PixelRenderThread }
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///////////////////////////////////////////////////////////////////////////////
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procedure TBucketFillerThread.AddPointsToBuckets(const points: TPointsArray);
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var
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i: integer;
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px, py: double;
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bws, bhs: double;
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bx, by: double;
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wx, wy: double;
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Bucket: PBucket;
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MapColor: PColorMapColor;
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begin
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bws := (BucketWidth - 0.5) * size[0];
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bhs := (BucketHeight - 0.5) * size[1];
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bx := bounds[0];
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by := bounds[1];
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wx := bounds[2] - bounds[0];
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wy := bounds[3] - bounds[1];
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for i := SUB_BATCH_SIZE - 1 downto 0 do begin
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px := points[i].x - bx;
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py := points[i].y - by;
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if ((px < 0) or (px > wx) or
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(py < 0) or (py > wy)) then
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continue;
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MapColor := @ColorMap[Round(points[i].c * 255)];
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Bucket := @TbucketArray(buckets^)[Round(bws * px) + Round(bhs * py) * BucketWidth];
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Inc(Bucket.Red, MapColor.Red);
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Inc(Bucket.Green, MapColor.Green);
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Inc(Bucket.Blue, MapColor.Blue);
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Inc(Bucket.Count);
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TBucketFillerThread.AddPointsToBucketsAngle(const points: TPointsArray);
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var
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i: integer;
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px, py: double;
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ca,sa: double;
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nx, ny: double;
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bws, bhs: double;
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bx, by: double;
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wx, wy: double;
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Bucket: PBucket;
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MapColor: PColorMapColor;
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begin
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bws := (BucketWidth - 0.5) * size[0];
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bhs := (BucketHeight - 0.5) * size[1];
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bx := bounds[0];
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by := bounds[1];
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wx := bounds[2] - bounds[0];
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wy := bounds[3] - bounds[1];
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ca := cos(FCP.FAngle);
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sa := sin(FCP.FAngle);
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for i := SUB_BATCH_SIZE - 1 downto 0 do begin
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px := points[i].x - RotationCenter[0];
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py := points[i].y - RotationCenter[1];
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nx := px * ca + py * sa;
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ny := -px * sa + py * ca;
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px := nx + FCP.Center[0] - bx;
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py := ny + FCP.Center[1] - by;
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if ((px < 0) or (px > wx) or
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(py < 0) or (py > wy)) then
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continue;
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MapColor := @ColorMap[Round(points[i].c * 255)];
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Bucket := @TbucketArray(buckets^)[Round(bws * px) + Round(bhs * py) * BucketWidth];
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Inc(Bucket.Red, MapColor.Red);
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Inc(Bucket.Green, MapColor.Green);
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Inc(Bucket.Blue, MapColor.Blue);
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Inc(Bucket.Count);
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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constructor TBucketFillerThread.Create(cp: TControlPoint);
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begin
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inherited Create(True);
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Self.FreeOnTerminate := True;
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Fcp := cp.Clone;
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SetLength(Points, SUB_BATCH_SIZE);
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end;
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///////////////////////////////////////////////////////////////////////////////
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destructor TBucketFillerThread.Destroy;
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begin
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FCP.Free;
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inherited;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TBucketFillerThread.Execute;
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var
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bc: integer;
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begin
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inherited;
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bc := 0;
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while (not Terminated) and (bc < Nrbatches) do begin
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fcp.iterateXYC(SUB_BATCH_SIZE, points);
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try
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EnterCriticalSection(CriticalSection);
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if FCP.FAngle = 0 then
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AddPointsToBuckets(Points)
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else
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AddPointsToBucketsAngle(Points);
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Inc(batchcounter^);
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bc := batchcounter^
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finally
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LeaveCriticalSection(CriticalSection);
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end;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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end.
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