1 program SimpleLoadFromFile;
6 {$IFDEF UNIX}{$IFDEF UseCThreads}
9 Classes, Windows, SysUtils, dglOpenGL, glBitmap, Helper;
12 oglWindow: TOpenGLWindow;
13 running: Boolean = true;
15 function WindowProc(hWnd: HWND; Msg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
25 if wParam = VK_RETURN then begin
26 tex := TglBitmap2D.Create; // create empty texture
28 tex.GrabScreen(0, 0, 800, 600, tfRGB8ub3); // copy current framebuffer content to texture
29 tex.SaveToFile(ExtractFilePath(ApplicationName) + 'screen.bmp', ftBMP); // save texture to file
30 WriteLn('screen saved to screen.bmp');
37 result := DefWindowProc(hWnd, Msg, wParam, lParam);
42 glBegin(GL_TRIANGLES);
43 glColor4f(1, 0, 0, 1); glVertex2f(400, 100);
44 glColor4f(0, 1, 0, 1); glVertex2f(100, 500);
45 glColor4f(0, 0, 1, 1); glVertex2f(700, 500);
50 oglWindow := CreateOpenGLWindow('GrapScreen (hit enter to grab screen)', 800, 600, @WindowProc);
51 while running and ProgressMesages do begin
53 SwapBuffers(oglWindow.DC);
55 DestroyOpenGLWindow(oglWindow);