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- program GDITEST16;
-
- uses
- Windows,
- Messages,
- SysUtils,
- GDIPAPI,
- GDIPOBJ;
-
- function metaCallback(recordType : TEmfPlusRecordType;
- flags : UINT;
- dataSize : UINT;
- data : PBYTE;
- callbackData: pointer
- ): BOOL; stdcall;
- begin
- // Play only EmfPlusRecordTypeFillEllipse records.
- if (recordType = EmfPlusRecordTypeFillEllipse) then
- begin
- // Explicitly cast callbackData as a metafile pointer, and use it to call
- // the PlayRecord method.
- TGPMetafile(callbackData).PlayRecord(recordType, flags, dataSize, Data);
- end;
- result := TRUE;
- end;
-
-
- Procedure OnPaint(DC: HDC);
- var
- graphics : TGPGraphics;
- pMeta: TGPMetafile;
- metaGraphics: TGPGraphics;
- blackBrush: TGPSolidBrush;
- redBrush: TGPSolidBrush;
- begin
- graphics := TGPGraphics.Create(DC);
- // Create a Metafile object from an existing disk metafile.
- pMeta := TGPMetaFile.Create('..\..\Media\SampleMetafile.emf');
- // Fill a rectangle and an ellipse in pMeta.
- metaGraphics := TGPGraphics.Create(pMeta);
- blackBrush:= TGPSolidBrush.Create(MakeColor(255, 0, 0, 0));
- redBrush:= TGPSolidBrush.Create(MakeColor(255, 255, 0, 0));
- metaGraphics.FillRectangle(blackBrush, 0, 0, 100, 100);
- metaGraphics.FillEllipse(redBrush, 100, 0, 200, 100);
-
- // Enumerate pMeta, passing pMeta as the callback data.
- graphics.EnumerateMetafile(pMeta, MakePoint(0, 0), metaCallback, pMeta);
- graphics.DrawImage(pMeta, MakePoint(0, 150));
-
- pMeta.free;
- metaGraphics.free;
- blackBrush.free;
- redBrush.free;
- graphics.Free;
- end;
-
-
- function WndProc(Wnd : HWND; message : UINT; wParam : Integer; lParam: Integer) : Integer; stdcall;
- var
- Handle: HDC;
- ps: PAINTSTRUCT;
- begin
- case message of
- WM_PAINT:
- begin
- Handle := BeginPaint(Wnd, ps);
- OnPaint(Handle);
- EndPaint(Wnd, ps);
- result := 0;
- end;
-
- WM_DESTROY:
- begin
- PostQuitMessage(0);
- result := 0;
- end;
-
- else
- result := DefWindowProc(Wnd, message, wParam, lParam);
- end;
- end;
-
- var
- hWnd : THandle;
- Msg : TMsg;
- wndClass : TWndClass;
- begin
- wndClass.style := CS_HREDRAW or CS_VREDRAW;
- wndClass.lpfnWndProc := @WndProc;
- wndClass.cbClsExtra := 0;
- wndClass.cbWndExtra := 0;
- wndClass.hInstance := hInstance;
- wndClass.hIcon := LoadIcon(0, IDI_APPLICATION);
- wndClass.hCursor := LoadCursor(0, IDC_ARROW);
- wndClass.hbrBackground := HBRUSH(GetStockObject(WHITE_BRUSH));
- wndClass.lpszMenuName := nil;
- wndClass.lpszClassName := 'GettingStarted';
-
- RegisterClass(wndClass);
-
- hWnd := CreateWindow(
- 'GettingStarted', // window class name
- 'EnumerateMetafile', // window caption
- WS_OVERLAPPEDWINDOW, // window style
- Integer(CW_USEDEFAULT), // initial x position
- Integer(CW_USEDEFAULT), // initial y position
- Integer(CW_USEDEFAULT), // initial x size
- Integer(CW_USEDEFAULT), // initial y size
- 0, // parent window handle
- 0, // window menu handle
- hInstance, // program instance handle
- nil); // creation parameters
-
- ShowWindow(hWnd, SW_SHOW);
- UpdateWindow(hWnd);
-
- while(GetMessage(msg, 0, 0, 0)) do
- begin
- TranslateMessage(msg);
- DispatchMessage(msg);
- end;
- end.
-