mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-06-15 00:58:30 +02:00
152 lines
3.1 KiB
ObjectPascal
152 lines
3.1 KiB
ObjectPascal
{
|
|
Demonstration software for image resizing and screenshot using PascalMagick
|
|
|
|
Created by: Felipe Monteiro de Carvalho
|
|
|
|
This software takes a screenshot of the screen and enlarges it using anti-aliasing
|
|
or not depending on what the user select.
|
|
|
|
Notes: This software uses X11 to take the screenshot so it will only work on UNIXes
|
|
|
|
More information on this page:
|
|
http://wiki.lazarus.freepascal.org/index.php/PascalMagick
|
|
|
|
April/2006
|
|
}
|
|
program screenshot;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
uses SysUtils, magick_wand, ImageMagick, Unix;
|
|
|
|
type
|
|
TCommand = (cmdQuit, cmdSample, cmdAntiAliase);
|
|
|
|
{
|
|
Catches exceptions from ImageMagick
|
|
}
|
|
procedure ThrowWandException(wand: PMagickWand);
|
|
var
|
|
description: PChar;
|
|
severity: ExceptionType;
|
|
begin
|
|
description := MagickGetException(wand, @severity);
|
|
WriteLn(Format('An error ocurred. Description: %s', [description]));
|
|
description := MagickRelinquishMemory(description);
|
|
Abort;
|
|
end;
|
|
|
|
{
|
|
Shows the main screen
|
|
}
|
|
function MainScreen: TCommand;
|
|
var
|
|
i: Integer;
|
|
Continuar: Boolean;
|
|
begin
|
|
Continuar := False;
|
|
|
|
WriteLn('=========================================================');
|
|
WriteLn(' Welcome to PascalMagick demo software 2');
|
|
WriteLn('=========================================================');
|
|
|
|
while not Continuar do
|
|
begin
|
|
WriteLn('');
|
|
WriteLn('The following commands are available:');
|
|
WriteLn(' 0 - Quit');
|
|
WriteLn(' 1 - Capture screenshot and resize it to 2024x1536');
|
|
WriteLn(' 2 - Same as #1 except that uses Anti-Aliasing');
|
|
Write(': ');
|
|
ReadLn(i);
|
|
|
|
case i of
|
|
0:
|
|
begin
|
|
Result := cmdQuit;
|
|
Continuar := True;
|
|
end;
|
|
|
|
1:
|
|
begin
|
|
Result := cmdSample;
|
|
Continuar := True;
|
|
end;
|
|
|
|
2:
|
|
begin
|
|
Result := cmdAntiAliase;
|
|
Continuar := True;
|
|
end;
|
|
|
|
else
|
|
WriteLn('Wrong Command!!');
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{
|
|
Main procedure
|
|
}
|
|
var
|
|
status: MagickBooleanType;
|
|
wand: PMagickWand;
|
|
TempDir, shellStr: string;
|
|
Antes: TTimeStamp;
|
|
Command: TCommand;
|
|
begin
|
|
{ Presentation screen and user options }
|
|
|
|
Command := MainScreen;
|
|
|
|
if Command = cmdQuit then Exit;
|
|
|
|
|
|
{ Create the image }
|
|
|
|
Antes := DateTimeToTimeStamp(Now);
|
|
|
|
TempDir := GetTempDir(False);
|
|
|
|
shellStr := 'xwd -root -out ' + TempDir + 'display.xwd';
|
|
|
|
WriteLn(shellStr);
|
|
|
|
shell(shellStr);
|
|
|
|
{ Read an image. }
|
|
|
|
MagickWandGenesis;
|
|
|
|
wand := NewMagickWand;
|
|
|
|
try
|
|
status := MagickReadImage(wand, PChar(TempDir + 'display.xwd'));
|
|
if (status = MagickFalse) then ThrowWandException(wand);
|
|
|
|
{ Enlarge the Image }
|
|
|
|
WriteLn('Enlarging');
|
|
|
|
if Command = cmdAntiAliase then MagickResizeImage(wand, 2024, 1536, BoxFilter, 1.0)
|
|
else MagickSampleImage(wand, 2024, 1536);
|
|
|
|
WriteLn(IntToStr(DateTimeToTimeStamp(Now).Time - Antes.Time));
|
|
|
|
WriteLn('Saving');
|
|
|
|
{ Write the image as MIFF and destroy it. }
|
|
|
|
status := MagickWriteImages(wand, PChar(TempDir + 'enlarged.jpg'), MagickTrue);
|
|
if (status = MagickFalse) then ThrowWandException(wand);
|
|
|
|
WriteLn(IntToStr(DateTimeToTimeStamp(Now).Time - Antes.Time));
|
|
|
|
finally
|
|
wand := DestroyMagickWand(wand);
|
|
|
|
MagickWandTerminus;
|
|
end;
|
|
end.
|
|
|