rostests/dibtests/vbltest/vbltest.c

   1 /*
   2  * Tests various blit and blend operations with different src
   3  * bit depths and scaling where possbile.
   4  *
   5  * Created by Gregor Schneider <grschneider AT gmail DOT com>, November 2008
   6 */
   7
   8 #include <windows.h>
   9 #include <tchar.h>
  10
  11 #define CURRENT_BMPS 4
  12 #define SCALE 1.5
  13 #define OFFSET 5
  14
  15 HINSTANCE hInst;
  16 TCHAR szWindowClass[] = _T("testclass");
  17
  18 static LRESULT CALLBACK
  19 WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
  20 {
  21     static HBITMAP hbmList[CURRENT_BMPS];
  22
  23     switch (message)
  24     {
  25         case WM_CREATE:
  26         {
  27             hbmList[0] = (HBITMAP)LoadImage(hInst, MAKEINTRESOURCE(100), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
  28             hbmList[1] = (HBITMAP)LoadImage(hInst, MAKEINTRESOURCE(400), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
  29             hbmList[2] = (HBITMAP)LoadImage(hInst, MAKEINTRESOURCE(800), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
  30             hbmList[3] = (HBITMAP)LoadImage(hInst, MAKEINTRESOURCE(2400), IMAGE_BITMAP, 0, 0, LR_DEFAULTCOLOR);
  31             break;
  32         }
  33
  34         case WM_PAINT:
  35         {
  36             PAINTSTRUCT ps;
  37             HDC hdc, hdcMem;
  38             BITMAP bitmap;
  39             BLENDFUNCTION bfunc;
  40             int x = 0, y = 0, i;
  41
  42             hdc = BeginPaint(hWnd, &ps);
  43             hdcMem = CreateCompatibleDC(hdc);
  44
  45             bfunc.AlphaFormat = AC_SRC_ALPHA;
  46             bfunc.BlendFlags = 0;
  47             bfunc.BlendOp = AC_SRC_OVER;
  48             bfunc.SourceConstantAlpha = 128;
  49
  50             for(i = 0; i < CURRENT_BMPS; i++)
  51             {
  52                 y = 0;
  53                 SelectObject(hdcMem, hbmList[i]);
  54                 GetObject(hbmList[i], sizeof(BITMAP), &bitmap);
  55
  56                 /* bit blt */
  57                 BitBlt(hdc, x, y, bitmap.bmWidth, bitmap.bmHeight, hdcMem, 0, 0, SRCCOPY);
  58                 y += bitmap.bmHeight + OFFSET;
  59
  60                 /* stretch blt, org size */
  61                 StretchBlt(hdc, x, y, bitmap.bmWidth, bitmap.bmHeight, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
  62                 y += bitmap.bmHeight + OFFSET;
  63
  64                 /* stretch blt, scaled */
  65                 StretchBlt(hdc, x, y, bitmap.bmWidth*SCALE, bitmap.bmHeight*SCALE, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
  66                 y += bitmap.bmHeight*SCALE + OFFSET;
  67
  68                 /* transparent blt, transparency: grey */
  69                 TransparentBlt(hdc, x, y, bitmap.bmWidth, bitmap.bmHeight, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, 128*256*256+128*256+128);
  70                 y += bitmap.bmHeight + OFFSET;
  71
  72                 /* transparent blt, transparency: grey, scaled */
  73                 TransparentBlt(hdc, x, y, bitmap.bmWidth*SCALE, bitmap.bmHeight*SCALE, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, 128*256*256+128*256+128);
  74                 y += bitmap.bmHeight*SCALE + OFFSET;
  75
  76                 /* alpha blend, org size */
  77                 AlphaBlend(hdc, x, y, bitmap.bmWidth, bitmap.bmHeight, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, bfunc);
  78                 y += bitmap.bmHeight + OFFSET;
  79
  80                 /* alpha blend, scaled */
  81                 AlphaBlend(hdc, x, y, bitmap.bmWidth*SCALE, bitmap.bmHeight*SCALE, hdcMem, 0, 0, bitmap.bmWidth, bitmap.bmHeight, bfunc);
  82
  83                 x += bitmap.bmWidth*SCALE + OFFSET;
  84             }
  85
  86             DeleteDC(hdcMem);
  87             EndPaint(hWnd, &ps);
  88             break;
  89         }
  90
  91         case WM_DESTROY:
  92             PostQuitMessage(0);
  93             break;
  94         default:
  95             return DefWindowProc(hWnd, message, wParam, lParam);
  96     }
  97     return 0;
  98 }
  99
 100
 101 static ATOM
 102 MyRegisterClass(HINSTANCE hInstance)
 103 {
 104     WNDCLASSEX wcex;
 105
 106     wcex.cbSize = sizeof(WNDCLASSEX);
 107
 108     wcex.style         = CS_HREDRAW | CS_VREDRAW;
 109     wcex.lpfnWndProc   = WndProc;
 110     wcex.cbClsExtra    = 0;
 111     wcex.cbWndExtra    = 0;
 112     wcex.hInstance     = hInstance;
 113     wcex.hIcon         = NULL;
 114     wcex.hCursor       = LoadCursor(NULL, IDC_ARROW);
 115     wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
 116     wcex.lpszMenuName  = NULL;
 117     wcex.lpszClassName = szWindowClass;
 118     wcex.hIconSm       = NULL;
 119
 120     return RegisterClassEx(&wcex);
 121 }
 122
 123
 124 static BOOL
 125 InitInstance(HINSTANCE hInstance, int nCmdShow)
 126 {
 127    HWND hWnd;
 128
 129    hInst = hInstance;
 130
 131    hWnd = CreateWindowEx(0,
 132                          szWindowClass,
 133                          _T("Various blit and blend operations"),
 134                          WS_OVERLAPPEDWINDOW,
 135                          CW_USEDEFAULT,
 136                          CW_USEDEFAULT,
 137                          640,
 138                          640,
 139                          NULL,
 140                          NULL,
 141                          hInstance,
 142                          NULL);
 143
 144    if (!hWnd)
 145    {
 146       return FALSE;
 147    }
 148
 149    ShowWindow(hWnd, nCmdShow);
 150    UpdateWindow(hWnd);
 151
 152    return TRUE;
 153 }
 154
 155
 156 int WINAPI
 157 _tWinMain(HINSTANCE hInstance,
 158                      HINSTANCE hPrevInstance,
 159                      LPTSTR    lpCmdLine,
 160                      int       nCmdShow)
 161 {
 162     MSG msg;
 163
 164     MyRegisterClass(hInstance);
 165
 166     if (!InitInstance(hInstance, nCmdShow))
 167     {
 168         return FALSE;
 169     }
 170
 171     while (GetMessage(&msg, NULL, 0, 0))
 172     {
 173         TranslateMessage(&msg);
 174         DispatchMessage(&msg);
 175     }
 176
 177     return (int)msg.wParam;
 178 }