380 lines
10 KiB
ObjectPascal
380 lines
10 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvSpecialImage.PAS, released on 2001-02-28.
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The Initial Developer of the Original Code is Sébastien Buysse [sbuysse att buypin dott com]
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Portions created by Sébastien Buysse are Copyright (C) 2001 Sébastien Buysse.
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All Rights Reserved.
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Contributor(s): Michael Beck [mbeck att bigfoot dott com].
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.sourceforge.net
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvSpecialImage.pas 10612 2006-05-19 19:04:09Z jfudickar $
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unit JvSpecialImage;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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SysUtils, Classes, Windows, Graphics, Controls, ExtCtrls, Forms,
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JvTypes, JvExExtCtrls;
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type
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TJvBright = 0..200;
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TJvSpecialImage = class(TJvExImage)
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private
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FInverted: Boolean;
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FFlipped: Boolean;
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FBrightness: TJvBright;
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FOriginal: TPicture;
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FMirrored: Boolean;
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FWorking: Boolean;
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FChangingLocalProperty: Boolean;
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procedure SetBright(Value: TJvBright);
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procedure SetFlipped(const Value: Boolean);
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procedure SetInverted(const Value: Boolean);
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procedure SetMirrored(const Value: Boolean);
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procedure PictureChanged(Sender: TObject);
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procedure ApplyChanges;
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function GetPicture: TPicture;
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procedure SetPicture(const Value: TPicture);
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protected
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procedure Loaded; override;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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published
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property Brightness: TJvBright read FBrightness write SetBright default 100;
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property Inverted: Boolean read FInverted write SetInverted default False;
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property Flipped: Boolean read FFlipped write SetFlipped default False;
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property Mirrored: Boolean read FMirrored write SetMirrored default False;
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property Picture: TPicture read GetPicture write SetPicture;
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procedure FadeIn;
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procedure FadeOut;
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procedure Reset;
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end;
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_32/run/JvSpecialImage.pas $';
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Revision: '$Revision: 10612 $';
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Date: '$Date: 2006-05-19 21:04:09 +0200 (ven., 19 mai 2006) $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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implementation
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constructor TJvSpecialImage.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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FOriginal := TPicture.Create;
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FBrightness := 100;
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FInverted := False;
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FFlipped := False;
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FMirrored := False;
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FWorking := False;
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FChangingLocalProperty := False;
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Picture.OnChange := PictureChanged;
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end;
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destructor TJvSpecialImage.Destroy;
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begin
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Picture.Assign(FOriginal);
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FOriginal.Free;
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inherited Destroy;
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end;
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procedure TJvSpecialImage.Loaded;
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begin
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inherited Loaded;
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FOriginal.Assign(Picture);
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end;
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procedure TJvSpecialImage.ApplyChanges;
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var
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I, J: Integer;
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Line, Line2: PJvRGBArray;
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Dest: TBitmap;
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Val: Integer;
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Tmp: TJvRGBTriple;
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begin
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if FWorking or (csLoading in ComponentState) or (csDestroying in ComponentState) then
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Exit;
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FWorking := True;
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Dest := TBitmap.Create;
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try
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//Copy original bitmap
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Dest.Width := FOriginal.Width;
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Dest.Height := FOriginal.Height;
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Dest.Canvas.Draw(0, 0, FOriginal.Graphic);
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Dest.PixelFormat := pf24Bit;
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if not Dest.Empty then
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begin
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// Set brightness
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Val := (FBrightness - 100) * 255 div 100;
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if Val > 0 then
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begin
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for I := 0 to Dest.Height - 1 do
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begin
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Line := Dest.ScanLine[I];
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for J := 0 to Dest.Width - 1 do
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with Line[J] do
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begin
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if rgbBlue + Val > 255 then
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rgbBlue := 255
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else
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rgbBlue := rgbBlue + Val;
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if rgbGreen + Val > 255 then
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rgbGreen := 255
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else
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rgbGreen := rgbGreen + Val;
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if rgbRed + Val > 255 then
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rgbRed := 255
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else
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rgbRed := rgbRed + Val;
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end;
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end;
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end
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else
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if Val < 0 then
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begin
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for I := 0 to Dest.Height - 1 do
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begin
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Line := Dest.ScanLine[I];
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for J := 0 to Dest.Width - 1 do
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with Line[J] do
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begin
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if rgbBlue + Val < 0 then
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rgbBlue := 0
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else
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rgbBlue := rgbBlue + Val;
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if rgbGreen + Val < 0 then
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rgbGreen := 0
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else
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rgbGreen := rgbGreen + Val;
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if rgbRed + Val < 0 then
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rgbRed := 0
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else
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rgbRed := rgbRed + Val;
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end;
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end;
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end;
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//Set Flipped
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if FFlipped then
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begin
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for I := 0 to (Dest.Height - 1) div 2 do
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begin
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Line := Dest.ScanLine[I];
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Line2 := Dest.ScanLine[Dest.Height - I - 1];
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for J := 0 to Dest.Width - 1 do
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begin
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Tmp := Line[J];
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Line[J] := Line2[J];
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Line2[J] := Tmp;
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end;
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end;
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end;
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//Set inverted
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if FInverted then
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begin
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for I := 0 to Dest.Height - 1 do
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begin
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Line := Dest.ScanLine[I];
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for J := 0 to Dest.Width - 1 do
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with Line[J] do
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begin
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rgbBlue := not rgbBlue;
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rgbGreen := not rgbGreen;
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rgbRed := not rgbRed;
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end;
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end;
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end;
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//Set mirrored
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if FMirrored then
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begin
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for I := 0 to Dest.Height - 1 do
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begin
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Line := Dest.ScanLine[I];
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for J := 0 to (Dest.Width - 1) div 2 do
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begin
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Tmp := Line[J];
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Line[J] := Line[Dest.Width - J - 1];
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Line[Dest.Width - J - 1] := Tmp;
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end;
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end;
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end;
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end;
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// We only need to assign the new picture if it occured after having
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// changed one of the local properties: Mirrored, Brightness, Inverted,
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// Flipped. This way we prevent freeing the graphic used by the inherited
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// procedures with the following assignment.
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// The most common example is when setting Transparent:
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//
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// In ExtCtrls.pas, you have this code:
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//
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// G.Transparent := FTransparent;
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//
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// This changes the picture, leading to this call stack:
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// TJvSpecialImage.PictureChanged -> calls ApplyChanges then
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// TJvSpecialImage.ApplyChanges -> calls inherited Picture.Assign(Dest) then
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// TPicture.Assign -> calls TPicture.SetGraphic then
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// FGraphic is freed, which is Picture.Graphic which is G.
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//
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// Hence, to prevent the freeing of G, we don't call the inherited
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// Picture.Assign, and it does not event prevent the image from being
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// updated with the correct values for the local properties as thoses were
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// already applied at a previous time when their calls were made.
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// This was Mantis 2693.
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if FChangingLocalProperty then
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inherited Picture.Assign(Dest);
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finally
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Dest.Free;
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FWorking := False;
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end;
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end;
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procedure TJvSpecialImage.FadeIn;
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var
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I: Integer;
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begin
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// (rom) needs better implementation. Timing is by CPU/graphics speed.
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for I := 0 to 50 do
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begin
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Brightness := I * 2;
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Application.ProcessMessages;
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end;
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end;
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procedure TJvSpecialImage.FadeOut;
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var
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I: Integer;
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begin
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// (rom) needs better implementation. Timing is by CPU/graphics speed.
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for I := 50 downto 0 do
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begin
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Brightness := I * 2;
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Application.ProcessMessages;
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end;
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end;
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function TJvSpecialImage.GetPicture: TPicture;
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begin
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Result := inherited Picture;
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end;
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procedure TJvSpecialImage.PictureChanged(Sender: TObject);
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begin
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if FWorking = False then
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begin
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FOriginal.Assign(inherited Picture);
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ApplyChanges; // SetBright(FBrightness);
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end;
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Invalidate;
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end;
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procedure TJvSpecialImage.Reset;
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begin
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FWorking := True;
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Brightness := 100;
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Inverted := False;
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Flipped := False;
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Mirrored := False;
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FWorking := False;
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Picture.Assign(FOriginal);
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end;
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procedure TJvSpecialImage.SetBright(Value: TJvBright);
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begin
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FChangingLocalProperty := True;
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try
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FBrightness := Value;
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ApplyChanges;
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finally
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FChangingLocalProperty := False;
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end;
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end;
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procedure TJvSpecialImage.SetFlipped(const Value: Boolean);
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begin
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if Value <> FFlipped then
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begin
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FChangingLocalProperty := True;
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try
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FFlipped := Value;
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ApplyChanges;
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finally
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FChangingLocalProperty := False;
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end;
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end;
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end;
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procedure TJvSpecialImage.SetInverted(const Value: Boolean);
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begin
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if Value <> FInverted then
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begin
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FChangingLocalProperty := True;
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try
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FInverted := Value;
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ApplyChanges;
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finally
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FChangingLocalProperty := False;
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end;
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end;
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end;
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procedure TJvSpecialImage.SetMirrored(const Value: Boolean);
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begin
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if Value <> FMirrored then
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begin
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FChangingLocalProperty := True;
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try
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FMirrored := Value;
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ApplyChanges;
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finally
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FChangingLocalProperty := False;
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end;
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end;
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end;
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procedure TJvSpecialImage.SetPicture(const Value: TPicture);
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begin
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FOriginal.Assign(Value);
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inherited Picture := Value;
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end;
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{$IFDEF UNITVERSIONING}
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initialization
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RegisterUnitVersion(HInstance, UnitVersioning);
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finalization
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UnregisterUnitVersion(HInstance);
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{$ENDIF UNITVERSIONING}
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end.
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