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{
$Id: masktest.pp,v 1.3 2001/02/14 23:08:59 sg Exp $
fpImg - Free Pascal Imaging Library
Copyright (C) 2000 - 2001 by
Areca Systems GmbH / Sebastian Guenther, sg@freepascal.org
Example: Display BMP file with monochrome mask
See the file COPYING, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
}
program MaskTest;
uses Classes, GFXBase, GFXImpl, fpImg, BMPReader;
type
TMainWindow = class
procedure Paint(Sender: TObject; const ARect: TRect);
private
Display: TDefDisplay;
Window: TGfxWindow;
Image2, Image4, Image8, Image24, Mask: TGfxImage;
Image2Canvas, Image4Canvas, Image8Canvas,
Image24Canvas, MaskCanvas: TGfxCanvas;
public
constructor Create(ADisplay: TDefDisplay);
destructor Destroy; override;
end;
constructor TMainWindow.Create(ADisplay: TDefDisplay);
begin
inherited Create;
Display := ADisplay;
// Load and prepare the images
Image2 := CreateImageFromFile(Display.DefaultScreen, TBMPReader, 'image2.bmp');
Image2Canvas :=
Display.DefaultScreen.CreateBitmap(Image2.Width, Image2.Height);
Image2Canvas.DrawImage(Image2, Point(0, 0));
Image4 := CreateImageFromFile(Display.DefaultScreen, TBMPReader, 'image4.bmp');
Image4Canvas :=
Display.DefaultScreen.CreateBitmap(Image4.Width, Image4.Height);
Image4Canvas.DrawImage(Image4, Point(0, 0));
Image8 := CreateImageFromFile(Display.DefaultScreen, TBMPReader, 'image8.bmp');
Image8Canvas :=
Display.DefaultScreen.CreateBitmap(Image8.Width, Image8.Height);
Image8Canvas.DrawImage(Image8, Point(0, 0));
Image24 := CreateImageFromFile(Display.DefaultScreen, TBMPReader, 'image24.bmp');
Image24Canvas :=
Display.DefaultScreen.CreateBitmap(Image24.Width, Image24.Height);
Image24Canvas.DrawImage(Image24, Point(0, 0));
// Load and prepare the image mask
Mask := CreateImageFromFile(Display.DefaultScreen, TBMPReader, 'mask.bmp');
MaskCanvas := Display.DefaultScreen.CreateMonoBitmap(Mask.Width, Mask.Height);
MaskCanvas.DrawImage(Mask, Point(0, 0));
Window := ADisplay.DefaultScreen.CreateWindow;
Window.Title := 'fpImg Blitting Mask Test';
Window.OnPaint := @Paint;
Window.SetClientSize(Size(Image2.Width * 2 + 64, Image2.Height * 2 + 64));
Window.Show;
end;
destructor TMainWindow.Destroy;
begin
MaskCanvas.Free;
Mask.Free;
Image24Canvas.Free;
Image24.Free;
Image8Canvas.Free;
Image8.Free;
Image4Canvas.Free;
Image4.Free;
Image2Canvas.Free;
Image2.Free;
inherited Destroy;
end;
procedure TMainWindow.Paint(Sender: TObject; const ARect: TRect);
var
Color: TGfxColor;
r: TRect;
i, x1, y1, x2, y2: Integer;
begin
Color.Red := 0;
Color.Green := 0;
Color.Alpha := 0;
r.Left := ARect.Left;
r.Right := ARect.Right;
for i := ARect.Top to ARect.Bottom - 1 do
begin
Color.Blue := $ffff - (i * $ffff) div Window.Height;
Color.Red := Color.Blue shr 1;
Window.Canvas.SetColor(Color);
r.Top := i;
r.Bottom := i + 1;
Window.Canvas.FillRect(r);
end;
x1 := Window.ClientWidth div 4 - Image2.Width div 2;
y1 := Window.ClientHeight div 4 - Image2.Height div 2;
x2 := x1 + Window.ClientWidth div 2;
y2 := y1 + Window.ClientHeight div 2;
Window.Canvas.MaskedCopy(Image2Canvas, MaskCanvas, Point(x1, y1));
Window.Canvas.TextOut(Point(x1, y1 + Image2.Height), 'monochrome');
Window.Canvas.MaskedCopy(Image4Canvas, MaskCanvas, Point(x2, y1));
Window.Canvas.TextOut(Point(x2, y1 + Image2.Height), '4bpp palettized');
Window.Canvas.MaskedCopy(Image8Canvas, MaskCanvas, Point(x1, y2));
Window.Canvas.TextOut(Point(x1, y2 + Image2.Height), '8bpp palettized');
Window.Canvas.MaskedCopy(Image24Canvas, MaskCanvas, Point(x2, y2));
Window.Canvas.TextOut(Point(x2, y2 + Image2.Height), '24bpp true color');
end;
var
Display: TDefDisplay;
MainWindow: TMainWindow;
begin
WriteLn('Version: ' + {$I %date%} + ' ' + {$I %time%});
Display := TDefDisplay.Create;
MainWindow := TMainWindow.Create(Display);
Display.Run;
MainWindow.Free;
Display.Free;
end.
{
$Log: masktest.pp,v $
Revision 1.3 2001/02/14 23:08:59 sg
* Adapted to changes in fpGFX interface
Revision 1.2 2001/02/09 20:49:03 sg
* Adapted to recent improvements in fpGFX interfaces
Revision 1.1 2001/01/11 23:21:53 sg
*** empty log message ***
}
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