635 lines
17 KiB
ObjectPascal
635 lines
17 KiB
ObjectPascal
unit ImageMaker;
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interface
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uses
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Windows, Graphics, ControlPoint, RenderTypes, PngImage;
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type TPalette = record
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logpal : TLogPalette;
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colors: array[0..255] of TPaletteEntry;
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end;
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type
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TImageMaker = class
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private
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FOversample: Integer;
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FFilterSize: Integer;
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FFilter: array of array of double;
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FBitmap: TBitmap;
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FAlphaBitmap: TBitmap;
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AlphaPalette: TPalette;
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FTransparentImage: TBitmap;
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FCP: TControlPoint;
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FBucketHeight: integer;
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FBucketWidth: integer;
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FBuckets64: TBucket64Array;
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FBuckets48: TBucket48Array;
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FBuckets32: TBucket32Array;
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FBuckets32f: TBucket32fArray;
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FOnProgress: TOnProgress;
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FGetBucket: function(x, y: integer): TBucket64 of object;
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function GetBucket64(x, y: integer): TBucket64;
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function GetBucket48(x, y: integer): TBucket64;
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function GetBucket32(x, y: integer): TBucket64;
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function GetBucket32f(x, y: integer): TBucket64;
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function SafeGetBucket(x, y: integer): TBucket64;
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procedure CreateFilter;
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procedure NormalizeFilter;
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public
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constructor Create;
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destructor Destroy; override;
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function GetImage: TBitmap;
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function GetTransparentImage: TPNGObject;
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procedure SetCP(CP: TControlPoint);
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procedure Init;
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procedure SetBucketData(const Buckets: pointer; BucketWidth, BucketHeight: integer; bits: integer);
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function GetFilterSize: Integer;
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procedure CreateImage(YOffset: integer = 0);
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procedure SaveImage(FileName: String);
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procedure GetBucketStats(var Stats: TBucketStats);
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property OnProgress: TOnProgress
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read FOnProgress
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write FOnProgress;
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end;
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implementation
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uses
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Math, SysUtils, JPEG, Global, Types;
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{ TImageMaker }
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type
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TRGB = packed Record
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blue: byte;
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green: byte;
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red: byte;
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end;
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PByteArray = ^TByteArray;
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TByteArray = array[0..0] of byte;
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// PLongintArray = ^TLongintArray;
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// TLongintArray = array[0..0] of Longint;
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PRGBArray = ^TRGBArray;
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TRGBArray = array[0..0] of TRGB;
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///////////////////////////////////////////////////////////////////////////////
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constructor TImageMaker.Create;
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var
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i: integer;
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begin
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AlphaPalette.logpal.palVersion := $300;
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AlphaPalette.logpal.palNumEntries := 256;
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for i := 0 to 255 do
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with AlphaPalette.logpal.palPalEntry[i] do begin
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peRed := i;
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peGreen := i;
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peBlue := i;
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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destructor TImageMaker.Destroy;
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begin
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if assigned(FBitmap) then
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FBitmap.Free;
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if assigned(FAlphaBitmap) then
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FAlphaBitmap.Free;
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if assigned(FTransparentImage) then
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FTransparentImage.Free;
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inherited;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.CreateFilter;
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var
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i, j: integer;
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fw: integer;
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adjust: double;
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ii, jj: double;
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begin
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FOversample := fcp.spatial_oversample;
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fw := Trunc(2.0 * FILTER_CUTOFF * FOversample * fcp.spatial_filter_radius);
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FFilterSize := fw + 1;
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// make sure it has same parity as oversample
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if odd(FFilterSize + FOversample) then
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inc(FFilterSize);
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if (fw > 0.0) then
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adjust := (1.0 * FILTER_CUTOFF * FFilterSize) / fw
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else
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adjust := 1.0;
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setLength(FFilter, FFilterSize, FFilterSize);
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for i := 0 to FFilterSize - 1 do begin
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for j := 0 to FFilterSize - 1 do begin
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ii := ((2.0 * i + 1.0)/ FFilterSize - 1.0) * adjust;
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jj := ((2.0 * j + 1.0)/ FFilterSize - 1.0) * adjust;
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FFilter[i, j] := exp(-2.0 * (ii * ii + jj * jj));
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end;
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end;
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Normalizefilter;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.NormalizeFilter;
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var
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i, j: integer;
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t: double;
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begin
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t := 0;
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for i := 0 to FFilterSize - 1 do
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for j := 0 to FFilterSize - 1 do
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t := t + FFilter[i, j];
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for i := 0 to FFilterSize - 1 do
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for j := 0 to FFilterSize - 1 do
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FFilter[i, j] := FFilter[i, j] / t;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TImageMaker.GetFilterSize: Integer;
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begin
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Result := FFiltersize;
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end;
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///////////////////////////////////////////////////////////////////////////////
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function TImageMaker.GetImage: TBitmap;
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begin
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// if ShowTransparency then
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// Result := GetTransparentImage
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// else
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Result := FBitmap;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.Init;
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begin
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if not Assigned(FBitmap) then
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FBitmap := TBitmap.Create;
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FBitmap.PixelFormat := pf24bit;
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FBitmap.Width := Fcp.Width;
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FBitmap.Height := Fcp.Height;
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if not Assigned(FAlphaBitmap) then
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FAlphaBitmap := TBitmap.Create;
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FAlphaBitmap.PixelFormat := pf8bit;
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FAlphaBitmap.Width := Fcp.Width;
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FAlphaBitmap.Height := Fcp.Height;
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CreateFilter;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.SetBucketData(const Buckets: pointer; BucketWidth, BucketHeight: integer; bits: integer);
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begin
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FBuckets64 := TBucket64Array(Buckets);
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FBuckets48 := TBucket48Array(Buckets);
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FBuckets32f := TBucket32fArray(Buckets);
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FBuckets32 := TBucket32Array(Buckets);
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FBucketWidth := BucketWidth;
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FBucketHeight := BucketHeight;
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case bits of
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BITS_32: FGetBucket := GetBucket32;
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BITS_32f: FGetBucket := GetBucket32f;
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BITS_48: FGetBucket := GetBucket48;
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BITS_64: FGetBucket := GetBucket64;
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else assert(false);
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end;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.SetCP(CP: TControlPoint);
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begin
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Fcp := CP;
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.CreateImage(YOffset: integer);
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var
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gamma: double;
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i, j: integer;
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alpha: double;
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ri, gi, bi: Integer;
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ai, ia: integer;
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bgtot, zero_BG: TRGB;
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ls: double;
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ii, jj: integer;
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fp: array[0..3] of double;
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Row: PRGBArray;
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AlphaRow: PbyteArray;
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vib, notvib: Integer;
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bgi: array[0..2] of Integer;
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// bucketpos: Integer;
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filterValue: double;
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// filterpos: Integer;
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lsa: array[0..1024] of double;
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sample_density: extended;
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gutter_width: integer;
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k1, k2: double;
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area: double;
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frac, funcval: double;
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GetBucket: function(x, y: integer): TBucket64 of object;
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bucket: TBucket64;
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bx, by: integer;
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label zero_alpha;
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begin
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if fcp.gamma = 0 then
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gamma := fcp.gamma
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else
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gamma := 1 / fcp.gamma;
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vib := round(fcp.vibrancy * 256.0);
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notvib := 256 - vib;
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if fcp.gamma_threshold <> 0 then
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funcval := power(fcp.gamma_threshold, gamma - 1); { / fcp.gamma_threshold; }
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bgi[0] := round(fcp.background[0]);
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bgi[1] := round(fcp.background[1]);
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bgi[2] := round(fcp.background[2]);
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bgtot.red := bgi[0];
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bgtot.green := bgi[1];
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bgtot.blue := bgi[2];
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zero_BG.red := 0;
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zero_BG.green := 0;
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zero_BG.blue := 0;
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gutter_width := FBucketwidth - FOversample * fcp.Width;
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// gutter_width := 2 * ((25 - Foversample) div 2);
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if(FFilterSize <= gutter_width div 2) then // filter too big when 'post-processing' ?
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GetBucket := FGetBucket
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else
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GetBucket := SafeGetBucket;
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FBitmap.PixelFormat := pf24bit;
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sample_density := fcp.actual_density * sqr( power(2, fcp.zoom) );
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if sample_density = 0 then sample_density := 0.001;
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k1 := (fcp.Contrast * BRIGHT_ADJUST * fcp.brightness * 268 * PREFILTER_WHITE) / 256.0;
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area := FBitmap.Width * FBitmap.Height / (fcp.ppux * fcp.ppuy);
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k2 := (FOversample * FOversample) / (fcp.Contrast * area * fcp.White_level * sample_density);
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lsa[0] := 0;
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for i := 1 to 1024 do begin
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lsa[i] := (k1 * log10(1 + fcp.White_level * i * k2)) / (fcp.White_level * i);
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end;
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ls := 0;
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ai := 0;
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//bucketpos := 0;
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by := 0;
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for i := 0 to fcp.Height - 1 do begin
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bx := 0;
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if (i and $7 = 0) and assigned(FOnProgress) then FOnProgress(i / fcp.Height);
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AlphaRow := PByteArray(FAlphaBitmap.scanline[YOffset + i]);
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Row := PRGBArray(FBitmap.scanline[YOffset + i]);
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for j := 0 to fcp.Width - 1 do begin
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if FFilterSize > 1 then begin
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fp[0] := 0;
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fp[1] := 0;
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fp[2] := 0;
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fp[3] := 0;
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for ii := 0 to FFilterSize - 1 do begin
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for jj := 0 to FFilterSize - 1 do begin
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filterValue := FFilter[ii, jj];
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bucket := GetBucket(bx + jj, by + ii);
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if bucket.count < 1024 then
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ls := lsa[bucket.Count]
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else
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ls := (k1 * log10(1 + fcp.White_level * bucket.count * k2)) / (fcp.White_level * bucket.count);
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fp[0] := fp[0] + filterValue * ls * bucket.Red;
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fp[1] := fp[1] + filterValue * ls * bucket.Green;
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fp[2] := fp[2] + filterValue * ls * bucket.Blue;
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fp[3] := fp[3] + filterValue * ls * bucket.Count;
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end;
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end;
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fp[0] := fp[0] / PREFILTER_WHITE;
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fp[1] := fp[1] / PREFILTER_WHITE;
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fp[2] := fp[2] / PREFILTER_WHITE;
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fp[3] := fcp.white_level * fp[3] / PREFILTER_WHITE;
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end else begin
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bucket := GetBucket(bx, by);
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if bucket.count < 1024 then
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ls := lsa[bucket.count] / PREFILTER_WHITE
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else
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ls := (k1 * log10(1 + fcp.White_level * bucket.count * k2)) / (fcp.White_level * bucket.count) / PREFILTER_WHITE;
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fp[0] := ls * bucket.Red;
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fp[1] := ls * bucket.Green;
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fp[2] := ls * bucket.Blue;
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fp[3] := ls * bucket.Count * fcp.white_level;
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end;
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Inc(bx, FOversample);
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if fcp.Transparency then begin // -------------------------- Transparency
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// gamma linearization
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if (fp[3] > 0.0) then begin
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if fp[3] <= fcp.gamma_threshold then begin
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frac := fp[3] / fcp.gamma_threshold;
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alpha := (1 - frac) * fp[3] * funcval + frac * power(fp[3], gamma);
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end
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else
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alpha := power(fp[3], gamma);
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ls := vib * alpha / fp[3];
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ai := round(alpha * 256);
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if (ai <= 0) then goto zero_alpha // ignore all if alpha = 0
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else if (ai > 255) then ai := 255;
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//ia := 255 - ai;
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end
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else begin
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zero_alpha:
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Row[j] := zero_BG;
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AlphaRow[j] := 0;
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continue;
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end;
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if (notvib > 0) then begin
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ri := Round(ls * fp[0] + notvib * power(fp[0], gamma));
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gi := Round(ls * fp[1] + notvib * power(fp[1], gamma));
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bi := Round(ls * fp[2] + notvib * power(fp[2], gamma));
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end
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else begin
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ri := Round(ls * fp[0]);
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gi := Round(ls * fp[1]);
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bi := Round(ls * fp[2]);
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end;
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// ignoring BG color in transparent renders...
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ri := (ri * 255) div ai; // ai > 0 !
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if (ri < 0) then ri := 0
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else if (ri > 255) then ri := 255;
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gi := (gi * 255) div ai;
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if (gi < 0) then gi := 0
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else if (gi > 255) then gi := 255;
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bi := (bi * 255) div ai;
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if (bi < 0) then bi := 0
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else if (bi > 255) then bi := 255;
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Row[j].red := ri;
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Row[j].green := gi;
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Row[j].blue := bi;
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AlphaRow[j] := ai;
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end
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else begin // ------------------------------------------- No transparency
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if (fp[3] > 0.0) then begin
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// gamma linearization
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if fp[3] <= fcp.gamma_threshold then begin
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frac := fp[3] / fcp.gamma_threshold;
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alpha := (1 - frac) * fp[3] * funcval + frac * power(fp[3], gamma);
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end
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else
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alpha := power(fp[3], gamma);
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ls := vib * alpha / fp[3];
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ai := round(alpha * 256);
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if (ai < 0) then ai := 0
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else if (ai > 255) then ai := 255;
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ia := 255 - ai;
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end
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else begin
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// no intensity so simply set the BG;
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Row[j] := bgtot;
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continue;
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end;
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if (notvib > 0) then begin
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ri := Round(ls * fp[0] + notvib * power(fp[0], gamma));
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gi := Round(ls * fp[1] + notvib * power(fp[1], gamma));
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bi := Round(ls * fp[2] + notvib * power(fp[2], gamma));
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end
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else begin
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ri := Round(ls * fp[0]);
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gi := Round(ls * fp[1]);
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bi := Round(ls * fp[2]);
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end;
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ri := ri + (ia * bgi[0]) shr 8;
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if (ri < 0) then ri := 0
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else if (ri > 255) then ri := 255;
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gi := gi + (ia * bgi[1]) shr 8;
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if (gi < 0) then gi := 0
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else if (gi > 255) then gi := 255;
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bi := bi + (ia * bgi[2]) shr 8;
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if (bi < 0) then bi := 0
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else if (bi > 255) then bi := 255;
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Row[j].red := ri;
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Row[j].green := gi;
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Row[j].blue := bi;
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AlphaRow[j] := ai;//?
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end
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end;
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//Inc(bucketpos, gutter_width);
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//Inc(bucketpos, (FOversample - 1) * FBucketWidth);
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Inc(by, FOversample);
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end;
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FBitmap.PixelFormat := pf24bit;
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if assigned(FOnProgress) then FOnProgress(1);
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end;
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///////////////////////////////////////////////////////////////////////////////
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procedure TImageMaker.SaveImage(FileName: String);
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var
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i,row: integer;
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PngObject: TPngObject;
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rowbm, rowpng: PByteArray;
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JPEGImage: TJPEGImage;
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PNGerror: boolean;
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label BMPhack;
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begin
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if UpperCase(ExtractFileExt(FileName)) = '.PNG' then begin
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pngError := false;
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PngObject := TPngObject.Create;
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try
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PngObject.Assign(FBitmap);
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if fcp.Transparency then // PNGTransparency <> 0
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begin
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PngObject.CreateAlpha;
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for i:= 0 to FAlphaBitmap.Height - 1 do begin
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rowbm := PByteArray(FAlphaBitmap.scanline[i]);
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rowpng := PByteArray(PngObject.AlphaScanline[i]);
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for row := 0 to FAlphaBitmap.Width -1 do begin
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rowpng[row] := rowbm[row];
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end;
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end;
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end;
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//else Exception.CreateFmt('Unexpected value of PNGTransparency [%d]', [PNGTransparency]);
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PngObject.SaveToFile(FileName);
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except
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pngError := true;
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end;
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PngObject.Free;
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if pngError then begin
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FileName := ChangeFileExt(FileName, '.bmp');
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goto BMPHack;
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end;
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end else if UpperCase(ExtractFileExt(FileName)) = '.JPG' then begin
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JPEGImage := TJPEGImage.Create;
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JPEGImage.Assign(FBitmap);
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JPEGImage.CompressionQuality := JPEGQuality;
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JPEGImage.SaveToFile(FileName);
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JPEGImage.Free;
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// with TLinearBitmap.Create do
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// try
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// Assign(Renderer.GetImage);
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// JPEGLoader.Default.Quality := JPEGQuality;
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// SaveToFile(RenderForm.FileName);
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// finally
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// Free;
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// end;
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end else begin // bitmap
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BMPHack:
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FBitmap.SaveToFile(FileName);
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if fcp.Transparency then begin
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FAlphaBitmap.Palette := CreatePalette(AlphaPalette.logpal);
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FileName := ChangeFileExt(FileName, '_alpha.bmp');
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FAlphaBitmap.SaveToFile(FileName);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
function TImageMaker.GetTransparentImage: TPngObject;
|
|
var
|
|
x, y: integer;
|
|
i, row: integer;
|
|
rowbm, rowpng: PByteArray;
|
|
begin
|
|
Result := TPngObject.Create;
|
|
Result.Assign(FBitmap);
|
|
|
|
if fcp.Transparency then begin
|
|
Result.CreateAlpha;
|
|
for i:= 0 to FAlphaBitmap.Height - 1 do begin
|
|
rowbm := PByteArray(FAlphaBitmap.scanline[i]);
|
|
rowpng := PByteArray(Result.AlphaScanline[i]);
|
|
for row := 0 to FAlphaBitmap.Width - 1 do begin
|
|
rowpng[row] := rowbm[row];
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
function TImageMaker.GetBucket64(x, y: integer): TBucket64;
|
|
begin
|
|
Result := FBuckets64[y][x];
|
|
end;
|
|
|
|
function TImageMaker.GetBucket32(x, y: integer): TBucket64;
|
|
begin
|
|
with FBuckets32[y][x] do begin
|
|
Result.Red := Red;
|
|
Result.Green := Green;
|
|
Result.Blue := Blue;
|
|
Result.Count := Count;
|
|
end;
|
|
end;
|
|
|
|
function TImageMaker.GetBucket32f(x, y: integer): TBucket64;
|
|
begin
|
|
with FBuckets32f[y][x] do begin
|
|
Result.Red := round(Red);
|
|
Result.Green := round(Green);
|
|
Result.Blue := round(Blue);
|
|
Result.Count := round(Count);
|
|
end;
|
|
end;
|
|
|
|
function TImageMaker.GetBucket48(x, y: integer): TBucket64;
|
|
begin
|
|
with FBuckets48[y][x] do begin
|
|
Result.Red := int64(rl) or ( int64(rh) shl 32 );
|
|
Result.Green := int64(gl) or ( int64(gh) shl 32 );
|
|
Result.Blue := int64(bl) or ( int64(bh) shl 32 );
|
|
Result.Count := int64(cl) or ( int64(ch) shl 32 );
|
|
end;
|
|
end;
|
|
|
|
function TImageMaker.SafeGetBucket(x, y: integer): TBucket64;
|
|
begin
|
|
if x < 0 then x := 0
|
|
else if x >= FBucketWidth then x := FBucketWidth-1;
|
|
if y < 0 then y := 0
|
|
else if y >= FBucketHeight then y := FBucketHeight-1;
|
|
Result := FGetBucket(x, y);
|
|
end;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
procedure TImageMaker.GetBucketStats(var Stats: TBucketStats);
|
|
var
|
|
bucketpos: integer;
|
|
x, y: integer;
|
|
b: TBucket64;
|
|
begin
|
|
with Stats do begin
|
|
MaxR := 0;
|
|
MaxG := 0;
|
|
MaxB := 0;
|
|
MaxA := 0;
|
|
TotalA := 0;
|
|
|
|
for y := 0 to FBucketHeight - 1 do
|
|
for x := 0 to FBucketWidth - 1 do begin
|
|
b := FGetBucket(x, y);
|
|
MaxR := max(MaxR, b.Red);
|
|
MaxG := max(MaxG, b.Green);
|
|
MaxB := max(MaxB, b.Blue);
|
|
MaxA := max(MaxA, b.Count);
|
|
Inc(TotalA, b.Count);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
end.
|