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- /*----------------------------------------------
- PALANIM.C -- Palette Animation Shell Program
- (c) Charles Petzold, 1998
- ----------------------------------------------*/
-
- #include <windows.h>
-
- extern HPALETTE CreateRoutine (HWND) ;
- extern void PaintRoutine (HDC, int, int) ;
- extern void TimerRoutine (HDC, HPALETTE) ;
- extern void DestroyRoutine (HWND, HPALETTE) ;
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- extern TCHAR szAppName [] ;
- extern TCHAR szTitle [] ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("This program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, szTitle,
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- if (!hwnd)
- return 0 ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- BOOL CheckDisplay (HWND hwnd)
- {
- HDC hdc ;
- int iPalSize ;
-
- hdc = GetDC (hwnd) ;
- iPalSize = GetDeviceCaps (hdc, SIZEPALETTE) ;
- ReleaseDC (hwnd, hdc) ;
-
- if (iPalSize != 256)
- {
- MessageBox (hwnd, TEXT ("This program requires that the video ")
- TEXT ("display mode have a 256-color palette."),
- szAppName, MB_ICONERROR) ;
- return FALSE ;
- }
- return TRUE ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- static HPALETTE hPalette ;
- static int cxClient, cyClient ;
- HDC hdc ;
- PAINTSTRUCT ps ;
-
- switch (message)
- {
- case WM_CREATE:
- if (!CheckDisplay (hwnd))
- return -1 ;
-
- hPalette = CreateRoutine (hwnd) ;
- return 0 ;
-
- case WM_DISPLAYCHANGE:
- if (!CheckDisplay (hwnd))
- DestroyWindow (hwnd) ;
-
- return 0 ;
-
- case WM_SIZE:
- cxClient = LOWORD (lParam) ;
- cyClient = HIWORD (lParam) ;
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
-
- PaintRoutine (hdc, cxClient, cyClient) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_TIMER:
- hdc = GetDC (hwnd) ;
-
- SelectPalette (hdc, hPalette, FALSE) ;
-
- TimerRoutine (hdc, hPalette) ;
-
- ReleaseDC (hwnd, hdc) ;
- return 0 ;
-
- case WM_QUERYNEWPALETTE:
- if (!hPalette)
- return FALSE ;
-
- hdc = GetDC (hwnd) ;
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
- InvalidateRect (hwnd, NULL, TRUE) ;
-
- ReleaseDC (hwnd, hdc) ;
- return TRUE ;
-
- case WM_PALETTECHANGED:
- if (!hPalette || (HWND) wParam == hwnd)
- break ;
-
- hdc = GetDC (hwnd) ;
- SelectPalette (hdc, hPalette, FALSE) ;
- RealizePalette (hdc) ;
- UpdateColors (hdc) ;
-
- ReleaseDC (hwnd, hdc) ;
- break ;
-
- case WM_DESTROY:
- DestroyRoutine (hwnd, hPalette) ;
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-