66 lines
1.5 KiB
ObjectPascal
66 lines
1.5 KiB
ObjectPascal
unit utest4;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, BGRABitmap, BGRABitmapTypes, Graphics, utestpacrect;
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type
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{ TTest4 }
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TTest4 = class(TTestPacRect)
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protected
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virtualScreen: TBitmap;
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public
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constructor Create;
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destructor Destroy; override;
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procedure OnPaint(Canvas: TCanvas; Left,Top,Width,Height: Integer); override;
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end;
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implementation
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{ TTest4 }
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constructor TTest4.Create;
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begin
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inherited Create;
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Name := 'TBGRABitmap.Draw(Bitmap). Non-flickering pacmans walking with a rectangle. Rectangle opacity depends on the rendering capacities of BGRABitmap on TBitmap.';
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virtualScreen := nil;
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end;
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destructor TTest4.Destroy;
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begin
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virtualScreen.Free;
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inherited Destroy;
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end;
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procedure TTest4.OnPaint(Canvas: TCanvas; Left,Top,Width, Height: Integer);
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var i: integer;
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begin
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if backgroundImg = nil then exit;
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if (virtualscreen <> nil) and ((virtualscreen.width <> width) or (virtualscreen.Height <> height)) then
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FreeAndNil(virtualScreen);
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if virtualscreen = nil then
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begin
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virtualscreen := TBitmap.Create;
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virtualscreen.width := Width;
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virtualscreen.Height := height;
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end;
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//draw background opaque on bitmap canvas
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backgroundImg.Draw(virtualScreen.Canvas,0,0,true);
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//draw sprites transparent on bitmap canvas
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for i := 0 to high(pacLoc) do
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pacImg[numPacImg].Draw(virtualscreen.Canvas,pacLoc[i].x,pacLoc[i].y,false);
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//draw virtualscreen as TBitmap
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Canvas.Draw(Left,Top,VirtualScreen);
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end;
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end.
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