reactos/apps/tests/lineclip/lineclip.c

   1 #include <windows.h>
   2 #include <stdio.h>
   3
   4 LRESULT WINAPI MainWndProc(HWND, UINT, WPARAM, LPARAM);
   5
   6 int WINAPI
   7 WinMain(HINSTANCE hInstance,
   8         HINSTANCE hPrevInstance,
   9         LPSTR lpszCmdLine,
  10         int nCmdShow)
  11 {
  12   WNDCLASS wc;
  13   MSG msg;
  14   HWND hWnd;
  15
  16   wc.lpszClassName = "ClipClass";
  17   wc.lpfnWndProc = MainWndProc;
  18   wc.style = CS_VREDRAW | CS_HREDRAW;
  19   wc.hInstance = hInstance;
  20   wc.hIcon = LoadIcon(NULL, (LPCTSTR)IDI_APPLICATION);
  21   wc.hCursor = LoadCursor(NULL, (LPCTSTR)IDC_ARROW);
  22   wc.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
  23   wc.lpszMenuName = NULL;
  24   wc.cbClsExtra = 0;
  25   wc.cbWndExtra = 0;
  26   if (RegisterClass(&wc) == 0)
  27     {
  28       fprintf(stderr, "RegisterClass failed (last error 0x%lX)\n",
  29               GetLastError());
  30       return(1);
  31     }
  32
  33   hWnd = CreateWindow("ClipClass",
  34                       "Line clipping test",
  35                       WS_OVERLAPPEDWINDOW|WS_HSCROLL|WS_VSCROLL,
  36                       0,
  37                       0,
  38                       CW_USEDEFAULT,
  39                       CW_USEDEFAULT,
  40                       NULL,
  41                       NULL,
  42                       hInstance,
  43                       NULL);
  44   if (hWnd == NULL)
  45     {
  46       fprintf(stderr, "CreateWindow failed (last error 0x%lX)\n",
  47               GetLastError());
  48       return(1);
  49     }
  50
  51   ShowWindow(hWnd, nCmdShow);
  52
  53   while(GetMessage(&msg, NULL, 0, 0))
  54   {
  55     TranslateMessage(&msg);
  56     DispatchMessage(&msg);
  57   }
  58
  59   return msg.wParam;
  60 }
  61
  62 static void
  63 DrawLines(HDC hDC)
  64 {
  65   static struct
  66     {
  67     int fromx;
  68     int fromy;
  69     int tox;
  70     int toy;
  71     }
  72   points[ ] =
  73     {
  74       {  50,  99, 125,  99 },
  75       { 160,  99, 190,  99 },
  76       { 300,  99, 225,  99 },
  77       {  50, 100, 125, 100 },
  78       { 160, 100, 190, 100 },
  79       { 300, 100, 225, 100 },
  80       {  50, 125, 300, 125 },
  81       {  50, 149, 125, 149 },
  82       { 160, 149, 190, 149 },
  83       { 300, 149, 225, 149 },
  84       {  50, 150, 125, 150 },
  85       { 160, 150, 190, 150 },
  86       { 300, 150, 225, 150 },
  87       { 160, 249, 190, 249 },
  88       { 160, 250, 190, 250 },
  89       { 149,  50, 149, 125 },
  90       { 149, 160, 149, 190 },
  91       { 149, 300, 149, 225 },
  92       { 150,  50, 150, 125 },
  93       { 150, 160, 150, 190 },
  94       { 150, 300, 150, 225 },
  95       { 199,  50, 199, 125 },
  96       { 199, 160, 199, 190 },
  97       { 199, 300, 199, 225 },
  98       { 200,  50, 200, 125 },
  99       { 200, 160, 200, 190 },
 100       { 200, 300, 200, 225 },
 101       { 175,  50, 175, 300 },
 102       {  50,  55, 300, 290 },
 103       { 300, 295,  50,  60 },
 104       {  50, 290, 300,  55 },
 105       { 300,  60,  50, 295 },
 106       {  55,  50, 290, 300 },
 107       { 295, 300,  60,  50 },
 108       {  55, 300, 290,  50 },
 109       { 295,  50,  60, 300 }
 110     };
 111   int i;
 112
 113   for (i = 0; i < sizeof(points) / sizeof(points[0]); i++)
 114     {
 115       MoveToEx(hDC, points[i].fromx, points[i].fromy, NULL);
 116       LineTo(hDC, points[i].tox, points[i].toy);
 117     }
 118 }
 119
 120 LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 121 {
 122         PAINTSTRUCT ps;
 123         HDC hDC;
 124         RECT clr;
 125         HRGN ClipRgn, ExcludeRgn;
 126         RECT Rect;
 127
 128         switch(msg)
 129         {
 130         case WM_PAINT:
 131           GetClientRect(hWnd, &clr);
 132           ClipRgn = CreateRectRgnIndirect(&clr);
 133           hDC = BeginPaint(hWnd, &ps);
 134           Rect.left = 100;
 135           Rect.top = 100;
 136           Rect.right = 250;
 137           Rect.bottom = 150;
 138           FillRect(hDC, &Rect, CreateSolidBrush(RGB(0xFF, 0x00, 0x00)));
 139           ExcludeRgn = CreateRectRgnIndirect(&Rect);
 140           CombineRgn(ClipRgn, ClipRgn, ExcludeRgn, RGN_DIFF);
 141           DeleteObject(ExcludeRgn);
 142           Rect.left = 150;
 143           Rect.top = 150;
 144           Rect.right = 200;
 145           Rect.bottom = 250;
 146           FillRect(hDC, &Rect, CreateSolidBrush(RGB(0xFF, 0x00, 0x00)));
 147           SelectObject(hDC, CreatePen(PS_SOLID, 0, RGB(0xFF, 0xFF, 0x00)));
 148           DrawLines(hDC);
 149           SelectObject(hDC, CreatePen(PS_SOLID, 0, RGB(0x00, 0x00, 0xFF)));
 150           ExcludeRgn = CreateRectRgnIndirect(&Rect);
 151           CombineRgn(ClipRgn, ClipRgn, ExcludeRgn, RGN_DIFF);
 152           DeleteObject(ExcludeRgn);
 153           SelectClipRgn(hDC, ClipRgn);
 154           DrawLines(hDC);
 155           EndPaint(hWnd, &ps);
 156           break;
 157
 158         case WM_DESTROY:
 159           PostQuitMessage(0);
 160           break;
 161
 162         default:
 163           return DefWindowProc(hWnd, msg, wParam, lParam);
 164         }
 165         return 0;
 166 }