rostests/dibtests/bitblt/bitblt.c

   1
   2 /*
   3  * Windows 2000 Graphics API Black Book
   4  * (BitBlt Bitmap Rendering Demo)
   5  *
   6  * Created by Damon Chandler <dmc27@ee.cornell.edu>
   7  * Updates can be downloaded at: <www.coriolis.com>
   8  *
   9  * Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
  10  * if you have any questions about this code.
  11  */
  12
  13
  14 #include <windows.h>
  15 #include <string.h>
  16
  17 HINSTANCE HInst;
  18 const char* WndClassName = "GMainWnd";
  19 LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
  20    LPARAM LParam);
  21
  22
  23 int APIENTRY WinMain(HINSTANCE HInstance, HINSTANCE HPrevInstance,
  24     LPTSTR lpCmdLine, int nCmdShow)
  25 {
  26    WNDCLASS wc;
  27    MSG msg;
  28
  29    HInst = HInstance;
  30
  31    memset(&wc, 0, sizeof(WNDCLASS));
  32
  33    wc.style = CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS;
  34    wc.lpfnWndProc = MainWndProc;
  35    wc.hInstance = HInstance;
  36    wc.hCursor = LoadCursor(NULL, (LPCTSTR)IDC_ARROW);
  37   /* wc.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_BTNFACE + 1); */
  38    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
  39    wc.lpszClassName = WndClassName;
  40
  41    if (RegisterClass(&wc))
  42    {
  43       HWND HWnd =
  44          CreateWindow(
  45             WndClassName, TEXT("BitBlt Bitmap Rendering Demo"),
  46             WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION |
  47             WS_VISIBLE | WS_CLIPSIBLINGS,
  48             0, 0, 220, 230,
  49             NULL, NULL, HInst, NULL
  50             );
  51
  52       if (HWnd)
  53       {
  54          ShowWindow(HWnd, nCmdShow);
  55          UpdateWindow(HWnd);
  56
  57          while (GetMessage(&msg, NULL, 0, 0))
  58          {
  59              TranslateMessage(&msg);
  60              DispatchMessage(&msg);
  61          }
  62       }
  63     }
  64     return 0;
  65 }
  66
  67 /* image related */
  68 BITMAP bmp;
  69 LPCSTR filename = TEXT("lena.bmp");
  70 HDC HMemDC = NULL;
  71 HBITMAP HOldBmp = NULL;
  72
  73 LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
  74    LPARAM LParam)
  75 {
  76    switch (Msg)
  77    {
  78       case WM_CREATE:
  79       {
  80          /* create a memory DC */
  81          HMemDC = CreateCompatibleDC(NULL);
  82          if (HMemDC)
  83          {
  84             /* load a bitmap from file */
  85             HBITMAP HBmp =
  86                /* static_cast<HBITMAP> */(
  87                   LoadImage(HInst, MAKEINTRESOURCE(1000), IMAGE_BITMAP,
  88                             0, 0, 0)
  89                             );
  90             if (HBmp)
  91             {
  92                /* extract dimensions of the bitmap */
  93                GetObject(HBmp, sizeof(BITMAP), &bmp);
  94
  95                /* associate the bitmap with the memory DC */
  96                /* HOldBmp = static_cast<HBITMAP> */
  97                 (SelectObject(HMemDC, HBmp)
  98                   );
  99             }
 100          }
 101       }
 102       case WM_PAINT:
 103       {
 104          PAINTSTRUCT ps;
 105          const HDC Hdc = BeginPaint(HWnd, &ps);
 106 #if 0
 107          try
 108 #endif
 109          {
 110
 111             /* TODO: add palette support (see Chapter 9)... */
 112
 113
 114             BitBlt(Hdc, 20, 15,
 115                    bmp.bmWidth, bmp.bmHeight,
 116                    HMemDC, 0, 0,
 117                    SRCCOPY);
 118          }
 119 #if 0
 120          catch (...)
 121 #endif
 122          {
 123             EndPaint(HWnd, &ps);
 124          }
 125          EndPaint(HWnd, &ps);
 126          break;
 127       }
 128       case WM_DESTROY:
 129       {
 130          /* clean up */
 131          DeleteObject(SelectObject(HMemDC, HOldBmp));
 132          DeleteDC(HMemDC);
 133
 134          PostQuitMessage(0);
 135          return 0;
 136       }
 137    }
 138    return DefWindowProc(HWnd, Msg, WParam, LParam);
 139 }