uses
Graphics;
// Capture the entire screen // Screenshot des gesamten Bildschirms procedure ScreenShot(Bild: TBitMap);
var
c: TCanvas;
r: TRect;
begin
c := TCanvas.Create;
c.Handle := GetWindowDC(GetDesktopWindow);
try
r := Rect(0, 0, Screen.Width, Screen.Height);
Bild.Width := Screen.Width;
Bild.Height := Screen.Height;
Bild.Canvas.CopyRect(r, c, r);
finally
ReleaseDC(0, c.Handle);
c.Free;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Form1.Visible := False;
Sleep(750); // some delay, ein wenig Zeit geben
ScreenShot(Image1.Picture.BitMap);
Form1.Visible := True;
end;
// Only active window // Screenshot des aktiven Fensters procedure ScreenShotActiveWindow(Bild: TBitMap);
var
c: TCanvas;
r, t: TRect;
h: THandle;
begin
c := TCanvas.Create;
c.Handle := GetWindowDC(GetDesktopWindow);
h := GetForeGroundWindow;
if h <> 0 then
GetWindowRect(h, t);
try
r := Rect(0, 0, t.Right - t.Left, t.Bottom - t.Top);
Bild.Width := t.Right - t.Left;
Bild.Height := t.Bottom - t.Top;
Bild.Canvas.CopyRect(r, c, t);
finally
ReleaseDC(0, c.Handle);
c.Free;
end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Form1.Visible := False;
Sleep(750); //some delay,ein wenig Zeit geben
ScreenShotActiveWindow(Image1.Picture.BitMap);
Form1.Visible := True;
end;
{**********************************************}// Another print screen function by Xavier P: // Capture the entire screen procedure ScreenShot(x: Integer;
y: Integer; //(x, y) = Left-top coordinate
Width: Integer;
Height: Integer; //(Width-Height) = Bottom-Right coordinate
bm: TBitMap); //Destination var
dc: HDC;
lpPal: PLOGPALETTE;
begin{test width and height}if ((Width = 0) or
(Height = 0)) then
Exit;
bm.Width := Width;
bm.Height := Height;
{get the screen dc}
dc := GetDc(0);
if (dc = 0) then
Exit;
{do we have a palette device?}if (GetDeviceCaps(dc, RASTERCAPS) and
RC_PALETTE = RC_PALETTE) thenbegin{allocate memory for a logical palette}
GetMem(lpPal,
SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)));
{zero it out to be neat}
FillChar(lpPal^,
SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)),
#0);
{fill in the palette version}
lpPal^.palVersion := $300;
{grab the system palette entries}
lpPal^.palNumEntries :=
GetSystemPaletteEntries(dc,
0,
256,
lpPal^.palPalEntry);
if (lpPal^.PalNumEntries <> 0) then{create the palette}
bm.Palette := CreatePalette(lpPal^);
FreeMem(lpPal, SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)));
end;
{copy from the screen to the bitmap}
BitBlt(bm.Canvas.Handle,
0,
0,
Width,
Height,
Dc,
x,
y,
SRCCOPY);
{release the screen dc}
ReleaseDc(0, dc);
end;
// Example: procedure TForm1.Button1Click(Sender: TObject);
begin
ScreenShot(0,0,Screen.Width, Screen.Height, Image1.Picture.Bitmap);
end;
{**********************************************}// Capture a window procedure ScreenShot(hWindow: HWND; bm: TBitmap);
var
Left, Top, Width, Height: Word;
R: TRect;
dc: HDC;
lpPal: PLOGPALETTE;
begin{Check if valid window handle}ifnot IsWindow(hWindow) then Exit;
{Retrieves the rectangular coordinates of the specified window}
GetWindowRect(hWindow, R);
Left := R.Left;
Top := R.Top;
Width := R.Right - R.Left;
Height := R.Bottom - R.Top;
bm.Width := Width;
bm.Height := Height;
{get the screen dc}
dc := GetDc(0);
if (dc = 0) thenbegin
Exit;
end;
{do we have a palette device?}if (GetDeviceCaps(dc, RASTERCAPS) and
RC_PALETTE = RC_PALETTE) thenbegin{allocate memory for a logical palette}
GetMem(lpPal,
SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)));
{zero it out to be neat}
FillChar(lpPal^,
SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)),
#0);
{fill in the palette version}
lpPal^.palVersion := $300;
{grab the system palette entries}
lpPal^.palNumEntries :=
GetSystemPaletteEntries(dc,
0,
256,
lpPal^.palPalEntry);
if (lpPal^.PalNumEntries <> 0) thenbegin{create the palette}
bm.Palette := CreatePalette(lpPal^);
end;
FreeMem(lpPal, SizeOf(TLOGPALETTE) +
(255 * SizeOf(TPALETTEENTRY)));
end;
{copy from the screen to the bitmap}
BitBlt(bm.Canvas.Handle,
0,
0,
Width,
Height,
Dc,
Left,
Top,
SRCCOPY);
{release the screen dc}
ReleaseDc(0, dc);
end;
// Example: Capture the foreground window: procedure TForm1.Button1Click(Sender: TObject);
begin
ScreenShot(GetForeGroundWindow, Image1.Picture.Bitmap);
end;
{**********************************************}// by Daniel Wischnewski
Sometimes you want to take a screen shot,
however often Windows has trouble with big data amounts and becomes very slow.
The simple solution isto make many small screen shots and paste the result together.
It""s not light speed, however often faster than taking the whole screen at once.
const
cTileSize = 50;
function TForm1.GetSCREENSHOT: TBitmap;
var
Locked: Boolean;
X, Y, XS, YS: Integer;
Canvas: TCanvas;
R: TRect;
begin
Result := TBitmap.Create;
Result.Width := Screen.Width;
Result.Height := Screen.Height;
Canvas := TCanvas.Create;
Canvas.Handle := GetDC(0);
Locked := Canvas.TryLock;
try
XS := Pred(Screen.Width div cTileSize);
if Screen.Width mod cTileSize > 0 then
Inc(XS);
YS := Pred(Screen.Height div cTileSize);
if Screen.Height mod cTileSize > 0 then
Inc(YS);
for X := 0 to XS dofor Y := 0 to YS dobegin
R := Rect(
X * cTileSize, Y * cTileSize, Succ(X) * cTileSize,
Succ(Y) * cTileSize);
Result.Canvas.CopyRect(R, Canvas, R);
end;
finallyif Locked then
Canvas.Unlock;
ReleaseDC(0, Canvas.Handle);
Canvas.Free;
end;
end;
Если Вас заинтересовала или понравилась информация по разработке на Delph - "Снимок экрана", Вы можете поставить закладку в социальной сети или в своём блоге на данную страницу: Так же Вы можете задать вопрос по работе этого модуля или примера через форму обратной связи, в сообщение обязательно указывайте название или ссылку на статью!