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| #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 wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = szAppName;
if (!RegisterClass(&wc))
{
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 (int)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 uMsg, WPARAM wParam, LPARAM lParam)
{
static HPALETTE hPalette;
static int cxClient, cyClient;
HDC hDC;
PAINTSTRUCT ps;
switch (uMsg)
{
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, uMsg, wParam, lParam);
} |
