| 1 | unit Dpi.Common;
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| 2 |
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| 3 | interface
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| 4 |
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| 5 | uses
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| 6 | {$IFDEF WINDOWS}Windows,{$ENDIF}
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| 7 | Classes, SysUtils, LCLType, Types, LCLIntf, Graphics, Math, Dpi.Graphics;
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| 8 |
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| 9 | const
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| 10 | DpiControlsComponentPaletteName = 'DpiControls';
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| 11 |
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| 12 | function BitBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc,
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| 13 | YSrc: Integer; Rop: DWORD = SRCCOPY): Boolean;
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| 14 | function BitBltCanvas(Dest: TCanvas; X, Y, Width, Height: Integer; Src: TCanvas;
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| 15 | XSrc, YSrc: Integer; Rop: DWORD = SRCCOPY): Boolean;
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| 16 | function BitBltBitmap(Dest: TBitmap; X, Y, Width, Height: Integer; Src: TBitmap;
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| 17 | XSrc, YSrc: Integer; Rop: DWORD = SRCCOPY; Precise: Boolean = False): Boolean;
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| 18 | function CreateRectRgn(X1, Y1, X2, Y2: Integer): HRGN;
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| 19 | {$IFDEF WINDOWS}
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| 20 | function ScrollDC(hDC: HDC; dx: longint; dy: longint; const lprcScroll: RECT;
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| 21 | const lprcClip:RECT;hrgnUpdate:HRGN; lprcUpdate: LPRECT): WINBOOL; overload;
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| 22 | {$ENDIF}
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| 23 | function ScrollDC(Canvas: TCanvas; dx: Longint; dy: Longint; const lprcScroll: TRect;
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| 24 | const lprcClip:TRect; hrgnUpdate: Handle; lprcUpdate: PRect): Boolean; overload;
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| 25 | function SetWindowPos(hWnd: HWND; hWndInsertAfter: HWND;
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| 26 | X, Y, cx, cy: Integer; uFlags: UINT): Boolean;
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| 27 | function ScaleToNative(Value: Integer): Integer; inline;
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| 28 | function ScaleToNativeDist(Base, Value: Integer): Integer;
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| 29 | function ScaleFromNative(Value: Integer): Integer;
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| 30 | function ScalePointToNative(Value: TPoint): TPoint;
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| 31 | function ScalePointFromNative(Value: TPoint): TPoint;
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| 32 | function ScaleSizeToNative(Value: TSize): TSize;
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| 33 | function ScaleSizeFromNative(Value: TSize): TSize;
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| 34 | function ScaleRectToNative(Value: TRect): TRect;
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| 35 | function ScaleRectFromNative(Value: TRect): TRect;
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| 36 | function ScaleFloatToNative(Value: Double): Double;
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| 37 | function ScaleFloatFromNative(Value: Double): Double;
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| 38 | procedure WriteLog(Text: string);
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| 39 | function GetSystemMetrics(nIndex: Integer): Integer;
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| 40 |
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| 41 | resourcestring
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| 42 | SNotImplemented = 'Not implemented';
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| 43 | SUnsupportedPaintOperationType = 'Unsupported paint operation type';
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| 44 |
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| 45 |
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| 46 | implementation
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| 47 |
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| 48 | uses
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| 49 | NativePixelPointer;
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| 50 |
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| 51 | function BitBltCanvas(Dest: TCanvas; X, Y, Width, Height: Integer;
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| 52 | Src: TCanvas; XSrc, YSrc: Integer; Rop: DWORD = SRCCOPY): Boolean;
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| 53 | begin
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| 54 | Result := BitBlt(Dest.Handle, X, Y, Width, Height, Src.Handle, XSrc, YSrc, Rop);
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| 55 | end;
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| 56 |
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| 57 | function BitBltBitmap(Dest: TBitmap; X, Y, Width, Height: Integer;
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| 58 | Src: TBitmap; XSrc, YSrc: Integer; Rop: DWORD = SRCCOPY;
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| 59 | Precise: Boolean = False): Boolean;
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| 60 | var
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| 61 | SrcPixel: TPixelPointer;
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| 62 | DstPixel: TPixelPointer;
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| 63 | XX, YY: Integer;
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| 64 | DstPixelX, DstPixelY: Integer;
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| 65 | DstPixelWidth, DstPixelHeight: Integer;
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| 66 | NewY: Integer;
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| 67 | begin
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| 68 | if not Precise or (Frac(ScreenInfo.Dpi / 96) = 0) then begin
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| 69 | // Use faster non-fractional scaling
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| 70 | Result := BitBlt(Dest.Canvas.Handle, X, Y, Width, Height, Src.Canvas.Handle,
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| 71 | XSrc, YSrc, Rop);
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| 72 | Exit;
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| 73 | end;
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| 74 |
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| 75 | if XSrc < 0 then begin
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| 76 | X := X - XSrc;
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| 77 | Width := Width - XSrc;
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| 78 | XSrc := 0;
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| 79 | end;
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| 80 | if YSrc < 0 then begin
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| 81 | Y := Y - YSrc;
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| 82 | Height := Height - YSrc;
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| 83 | YSrc := 0;
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| 84 | end;
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| 85 |
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| 86 | if X < 0 then begin
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| 87 | Width := Width + X;
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| 88 | XSrc := XSrc - X;
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| 89 | X := 0;
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| 90 | end;
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| 91 | if Y < 0 then begin
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| 92 | Height := Height + Y;
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| 93 | YSrc := YSrc - Y;
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| 94 | Y := 0;
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| 95 | end;
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| 96 | if (X + Width) >= Dest.Width then begin
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| 97 | Width := Dest.Width - X;
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| 98 | end;
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| 99 | if (Y + Height) >= Dest.Height then begin
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| 100 | Height := Dest.Height - Y;
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| 101 | end;
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| 102 | if (Width < 0) or (Height < 0) then begin
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| 103 | Result := True;
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| 104 | Exit;
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| 105 | end;
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| 106 |
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| 107 | Dest.BeginUpdate;
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| 108 | SrcPixel := TPixelPointer.Create(Src.NativeBitmap);
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| 109 | DstPixel := TPixelPointer.Create(Dest.NativeBitmap, ScaleToNative(X), ScaleToNative(Y));
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| 110 | if Rop = SRCCOPY then begin
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| 111 | for YY := 0 to Height - 1 do begin
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| 112 | SrcPixel.SetXY(0, ScaleToNative(YSrc + YY));
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| 113 | DstPixelHeight := ScaleToNative(Y + YY + 1) - ScaleToNative(Y + YY);
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| 114 | for DstPixelY := 0 to DstPixelHeight - 1 do begin
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| 115 | for XX := 0 to Width - 1 do begin
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| 116 | SrcPixel.SetX(ScaleToNative(XSrc + XX));
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| 117 | DstPixelWidth := ScaleToNative(X + XX + 1) - ScaleToNative(X + XX);
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| 118 | for DstPixelX := 0 to DstPixelWidth - 1 do begin
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| 119 | DstPixel.PixelRGB := SrcPixel.PixelARGB;
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| 120 | DstPixel.NextPixel;
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| 121 | end;
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| 122 | end;
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| 123 | DstPixel.NextLine;
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| 124 | end;
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| 125 | end;
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| 126 | end else
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| 127 | if Rop = SRCPAINT then begin
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| 128 | for YY := 0 to Height - 1 do begin
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| 129 | SrcPixel.SetXY(0, ScaleToNative(YSrc + YY));
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| 130 | DstPixelHeight := ScaleToNative(Y + YY + 1) - ScaleToNative(Y + YY);
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| 131 | for DstPixelY := 0 to DstPixelHeight - 1 do begin
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| 132 | for XX := 0 to Width - 1 do begin
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| 133 | SrcPixel.SetX(ScaleToNative(XSrc + XX));
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| 134 | DstPixelWidth := ScaleToNative(X + XX + 1) - ScaleToNative(X + XX);
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| 135 | for DstPixelX := 0 to DstPixelWidth - 1 do begin
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| 136 | DstPixel.PixelRGB := DstPixel.PixelRGB or SrcPixel.PixelARGB;
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| 137 | DstPixel.NextPixel;
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| 138 | end;
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| 139 | end;
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| 140 | DstPixel.NextLine;
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| 141 | end;
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| 142 | end;
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| 143 | end else
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| 144 | if Rop = SRCAND then begin
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| 145 | for YY := 0 to Height - 1 do begin
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| 146 | SrcPixel.SetXY(0, ScaleToNative(YSrc + YY));
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| 147 | DstPixelHeight := ScaleToNative(Y + YY + 1) - ScaleToNative(Y + YY);
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| 148 | for DstPixelY := 0 to DstPixelHeight - 1 do begin
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| 149 | for XX := 0 to Width - 1 do begin
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| 150 | SrcPixel.SetX(ScaleToNative(XSrc + XX));
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| 151 | DstPixelWidth := ScaleToNative(X + XX + 1) - ScaleToNative(X + XX);
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| 152 | for DstPixelX := 0 to DstPixelWidth - 1 do begin
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| 153 | DstPixel.PixelRGB := DstPixel.PixelRGB and SrcPixel.PixelARGB;
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| 154 | DstPixel.NextPixel;
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| 155 | end;
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| 156 | end;
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| 157 | DstPixel.NextLine;
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| 158 | end;
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| 159 | end;
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| 160 | end else
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| 161 | if Rop = DSTINVERT then begin
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| 162 | for YY := 0 to Height - 1 do begin
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| 163 | SrcPixel.SetXY(0, ScaleToNative(YSrc + YY));
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| 164 | DstPixelHeight := ScaleToNative(Y + YY + 1) - ScaleToNative(Y + YY);
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| 165 | for DstPixelY := 0 to DstPixelHeight - 1 do begin
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| 166 | for XX := 0 to Width - 1 do begin
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| 167 | SrcPixel.SetX(ScaleToNative(XSrc + XX));
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| 168 | DstPixelWidth := ScaleToNative(X + XX + 1) - ScaleToNative(X + XX);
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| 169 | for DstPixelX := 0 to DstPixelWidth - 1 do begin
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| 170 | DstPixel.PixelRGB := not DstPixel.PixelRGB;
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| 171 | DstPixel.NextPixel;
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| 172 | end;
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| 173 | end;
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| 174 | DstPixel.NextLine;
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| 175 | end;
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| 176 | end;
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| 177 | end else raise Exception.Create(SUnsupportedPaintOperationType);
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| 178 | Dest.EndUpdate;
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| 179 | Result := True;
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| 180 | end;
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| 181 |
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| 182 | function CreateRectRgn(X1, Y1, X2, Y2: Integer): HRGN;
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| 183 | begin
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| 184 | Result := LCLIntf.CreateRectRgn(ScaleToNative(X1), ScaleToNative(Y1), ScaleToNative(X2),
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| 185 | ScaleToNative(Y2));
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| 186 | end;
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| 187 |
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| 188 | {$IFDEF WINDOWS}
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| 189 | function ScrollDC(hDC: HDC; dx: longint; dy: longint; const lprcScroll: RECT;
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| 190 | const lprcClip: RECT; hrgnUpdate: HRGN; lprcUpdate: LPRECT): WINBOOL;
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| 191 | var
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| 192 | R: RECT;
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| 193 | begin
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| 194 | if Assigned(lprcUpdate) then begin
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| 195 | R := ScaleRectToNative(lprcUpdate^);
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| 196 | lprcUpdate := @R;
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| 197 | end;
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| 198 | Result := Windows.ScrollDC(hDC, ScaleToNative(dx), ScaleToNative(dY),
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| 199 | ScaleRectToNative(lprcScroll), ScaleRectToNative(lprcClip), hrgnUpdate, lprcUpdate);
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| 200 | end;
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| 201 | {$ENDIF}
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| 202 |
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| 203 | function ScrollDC(Canvas: TCanvas; dx: Longint; dy: Longint;
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| 204 | const lprcScroll: TRect; const lprcClip: TRect; hrgnUpdate: Handle;
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| 205 | lprcUpdate: PRect): Boolean;
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| 206 | begin
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| 207 | {$IFDEF WINDOWS}
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| 208 | Result := Windows.ScrollDC(Canvas.Handle, ScaleToNative(dx), ScaleToNative(dy),
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| 209 | ScaleRectToNative(lprcScroll), ScaleRectToNative(lprcClip),
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| 210 | hrgnUpdate, lprcUpdate);
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| 211 | {$ENDIF}
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| 212 | {$IFDEF LINUX}
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| 213 | // Can't do scrolling of DC under Linux, then fallback into BitBlt.
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| 214 | Result := BitBltCanvas(Canvas, lprcScroll.Left + dx, lprcScroll.Top + dy, lprcScroll.Right - lprcScroll.Left, lprcScroll.Bottom - lprcScroll.Top,
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| 215 | Canvas, lprcScroll.Left, lprcScroll.Top);
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| 216 | {$ENDIF}
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| 217 | end;
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| 218 |
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| 219 | function SetWindowPos(hWnd: HWND; hWndInsertAfter: HWND; X, Y, cx, cy: Integer;
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| 220 | uFlags: UINT): Boolean;
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| 221 | begin
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| 222 | Result := LCLIntf.SetWindowPos(hWnd, hWndInsertAfter, ScaleToNative(X), ScaleToNative(Y),
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| 223 | ScaleToNative(cx), ScaleToNative(cy), uFlags);
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| 224 | end;
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| 225 |
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| 226 | function ScaleToNative(Value: Integer): Integer; inline;
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| 227 | begin
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| 228 | Result := ScreenInfo.Lookup[Value];
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| 229 | // Round and Trunc are fast. Ceil and Floor are slow.
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| 230 | // Without lookup table we would use:
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| 231 | // Result := Ceil(Value * ScreenInfo.ToNative);
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| 232 | end;
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| 233 |
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| 234 | function ScaleToNativeDist(Base, Value: Integer): Integer;
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| 235 | begin
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| 236 | Result := ScaleToNative(Base + Value) - ScaleToNative(Base);
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| 237 | end;
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| 238 |
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| 239 | function ScaleFromNative(Value: Integer): Integer;
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| 240 | begin
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| 241 | Result := Trunc(Value * ScreenInfo.FromNative);
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| 242 | end;
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| 243 |
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| 244 | function ScalePointToNative(Value: TPoint): TPoint;
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| 245 | begin
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| 246 | Result.X := ScaleToNative(Value.X);
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| 247 | Result.Y := ScaleToNative(Value.Y);
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| 248 | end;
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| 249 |
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| 250 | function ScalePointFromNative(Value: TPoint): TPoint;
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| 251 | begin
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| 252 | Result.X := ScaleFromNative(Value.X);
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| 253 | Result.Y := ScaleFromNative(Value.Y);
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| 254 | end;
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| 255 |
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| 256 | function ScaleSizeToNative(Value: TSize): TSize;
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| 257 | begin
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| 258 | Result.Width := ScaleToNative(Value.Width);
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| 259 | Result.Height := ScaleToNative(Value.Height);
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| 260 | end;
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| 261 |
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| 262 | function ScaleSizeFromNative(Value: TSize): TSize;
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| 263 | begin
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| 264 | Result.Width := ScaleFromNative(Value.Width);
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| 265 | Result.Height := ScaleFromNative(Value.Height);
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| 266 | end;
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| 267 |
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| 268 | function ScaleRectToNative(Value: TRect): TRect;
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| 269 | begin
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| 270 | Result.Left := ScaleToNative(Value.Left);
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| 271 | Result.Top := ScaleToNative(Value.Top);
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| 272 | Result.Right := ScaleToNative(Value.Right);
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| 273 | Result.Bottom := ScaleToNative(Value.Bottom);
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| 274 | end;
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| 275 |
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| 276 | function ScaleRectFromNative(Value: TRect): TRect;
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| 277 | begin
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| 278 | Result.Left := ScaleFromNative(Value.Left);
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| 279 | Result.Top := ScaleFromNative(Value.Top);
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| 280 | Result.Right := ScaleFromNative(Value.Right);
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| 281 | Result.Bottom := ScaleFromNative(Value.Bottom);
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| 282 | end;
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| 283 |
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| 284 | function ScaleFloatToNative(Value: Double): Double;
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| 285 | begin
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| 286 | Result := Value * ScreenInfo.ToNative;
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| 287 | end;
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| 288 |
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| 289 | function ScaleFloatFromNative(Value: Double): Double;
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| 290 | begin
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| 291 | Result := Value * ScreenInfo.FromNative;
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| 292 | end;
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| 293 |
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| 294 | procedure WriteLog(Text: string);
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| 295 | var
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| 296 | F: Text;
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| 297 | const
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| 298 | FileName = 'Log.txt';
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| 299 | begin
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| 300 | AssignFile(F, FileName);
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| 301 | if FileExists(FileName) then Append(F) else Rewrite(F);
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| 302 | WriteLn(F, Text);
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| 303 | CloseFile(F);
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| 304 | end;
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| 305 |
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| 306 | function GetSystemMetrics(nIndex: Integer): Integer;
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| 307 | begin
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| 308 | Result := ScaleFromNative(LCLIntf.GetSystemMetrics(nIndex));
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| 309 | end;
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| 310 |
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| 311 | function BitBlt(DestDC: HDC; X, Y, Width, Height: Integer; SrcDC: HDC; XSrc,
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| 312 | YSrc: Integer; Rop: DWORD = SRCCOPY): Boolean;
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| 313 | var
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| 314 | DstWidth, DstHeight: Integer;
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| 315 | SrcWidth, SrcHeight: Integer;
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| 316 | begin
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| 317 | DstWidth := ScaleToNativeDist(X, Width);
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| 318 | DstHeight := ScaleToNativeDist(Y, Height);
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| 319 | SrcWidth := ScaleToNativeDist(XSrc, Width);
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| 320 | SrcHeight := ScaleToNativeDist(YSrc, Height);
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| 321 |
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| 322 | if (DstWidth = SrcWidth) and (DstHeight = SrcHeight) then begin
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| 323 | {$IFDEF WINDOWS}
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| 324 | // On Windows LCLIntf.BitBlt is slower than direct Windows BitBlt
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| 325 | Result := Windows.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y),
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| 326 | DstWidth, DstHeight, SrcDC,
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| 327 | ScaleToNative(XSrc), ScaleToNative(YSrc), Rop);
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| 328 | {$ELSE}
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| 329 | Result := LCLIntf.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y),
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| 330 | DstWidth, DstHeight, SrcDC,
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| 331 | ScaleToNative(XSrc), ScaleToNative(YSrc), Rop);
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| 332 | {$ENDIF}
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| 333 | end else begin
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| 334 | {$IFDEF WINDOWS}
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| 335 | // On Windows LCLIntf.BitBlt is slower than direct Windows BitBlt
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| 336 | Result := Windows.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y),
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| 337 | Min(SrcWidth, DstWidth), Min(DstHeight, SrcHeight), SrcDC,
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| 338 | ScaleToNative(XSrc), ScaleToNative(YSrc), Rop);
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| 339 |
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| 340 | // Instead calling StretchBlt for entire region try to draw missing part with BitBlt
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| 341 | if DstWidth > SrcWidth then begin
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| 342 | Windows.BitBlt(DestDC, ScaleToNative(X) + SrcWidth, ScaleToNative(Y),
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| 343 | DstWidth - SrcWidth, DstHeight, SrcDC,
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| 344 | ScaleToNative(XSrc) + SrcWidth - (DstWidth - SrcWidth), ScaleToNative(YSrc), Rop);
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| 345 | end;
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| 346 | if DstHeight > SrcHeight then begin
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| 347 | Windows.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y) + SrcHeight,
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| 348 | DstWidth, DstHeight - SrcHeight, SrcDC,
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| 349 | ScaleToNative(XSrc), ScaleToNative(YSrc) + SrcHeight - (DstHeight - SrcHeight), Rop);
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| 350 | end;
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| 351 | {$ELSE}
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| 352 | Result := LCLIntf.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y),
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| 353 | Min(SrcWidth, DstWidth), Min(DstHeight, SrcHeight), SrcDC,
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| 354 | ScaleToNative(XSrc), ScaleToNative(YSrc), Rop);
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| 355 |
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| 356 | // Instead calling StretchBlt for entire region try to draw missing part with BitBlt
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| 357 | if DstWidth > SrcWidth then begin
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| 358 | LCLIntf.BitBlt(DestDC, ScaleToNative(X) + SrcWidth, ScaleToNative(Y),
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| 359 | DstWidth - SrcWidth, DstHeight, SrcDC,
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| 360 | ScaleToNative(XSrc) + SrcWidth - (DstWidth - SrcWidth), ScaleToNative(YSrc), Rop);
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| 361 | end;
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| 362 | if DstHeight > SrcHeight then begin
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| 363 | LCLIntf.BitBlt(DestDC, ScaleToNative(X), ScaleToNative(Y) + SrcHeight,
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| 364 | DstWidth, DstHeight - SrcHeight, SrcDC,
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| 365 | ScaleToNative(XSrc), ScaleToNative(YSrc) + SrcHeight - (DstHeight - SrcHeight), Rop);
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| 366 | end;
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| 367 | {$ENDIF}
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| 368 | end;
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| 369 | end;
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| 370 |
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| 371 | end.
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| 372 |
|
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