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161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
//
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// screensave.c
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//
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// Entrypoint for a win32 screensaver
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//
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// NOTES: Screen savers don't like being UPX'd (compressed). Don't
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// know why, it just is. C-runtime has been stripped with
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// "libctiny.lib".
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//
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// v1.0 1/12/2003 J Brown
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//
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#include <windows.h>
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#include <windowsx.h>
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#include <tchar.h>
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#include "globals.h"
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#include "message.h"
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#include "matrix.h"
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#include "resource.h"
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//#pragma comment(lib, "libctiny.lib")
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//#pragma comment(linker, "/OPT:NOWIN98")
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//
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// Added: Multimonitor support!!
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//
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HMONITOR (WINAPI * pfnEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
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BOOL (WINAPI * pfnGetMonitorInfo)(HMONITOR, LPMONITORINFO);
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//
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// Callback function for EnumDisplayMonitors API. Use this function
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// to kickstart a screen-saver window for each monitor in the system
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//
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BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, RECT *rcMonitor, LPARAM Param)
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{
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HWND hwnd;
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// Create a screensaver on this monitor!
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hwnd = CreateScreenSaveWnd((HWND)Param, rcMonitor);
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// For some reason windows always places this window at 0,0...
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// position it ourselves
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SetWindowPos(hwnd, 0, rcMonitor->left, rcMonitor->top, 0, 0,
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SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOSIZE|SWP_SHOWWINDOW);
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return TRUE;
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}
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//
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// Start screen saver!
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//
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BOOL ScreenSaver(HWND hwndParent)
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{
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HMODULE hUser32;
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UINT nPreviousState;
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MSG msg;
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InitScreenSaveClass(hwndParent);
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SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, TRUE, &nPreviousState, 0);
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// Dynamically locate API call from USER32 - not present in all versions
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hUser32 = GetModuleHandle(_T("USER32.DLL"));
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pfnEnumDisplayMonitors = (PVOID)GetProcAddress(hUser32, "EnumDisplayMonitors");
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// If we're running Win2k+ then the API is available...so call it!
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if(pfnEnumDisplayMonitors && hwndParent == 0)
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{
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pfnEnumDisplayMonitors(NULL, NULL, MonitorEnumProc, 0);
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}
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// Otherwise simulate by calling enum-proc manually
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else
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{
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RECT rect;
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rect.left = 0;
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rect.right = GetSystemMetrics(SM_CXSCREEN);
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rect.top = 0;
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rect.bottom = GetSystemMetrics(SM_CYSCREEN);
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MonitorEnumProc(NULL, NULL, &rect, (LPARAM)hwndParent);
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}
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// run message loop to handle all screen-saver windows
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while(GetMessage(&msg, NULL,0,0))
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{
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, FALSE, &nPreviousState, 0);
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return TRUE;
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}
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//
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// Look for any options Windows has passed to us:
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//
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// -a <hwnd> (set password)
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// -s (screensave)
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// -p <hwnd> (preview)
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// -c <hwnd> (configure)
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//
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VOID ParseCommandLine(LPWSTR szCmdLine, UCHAR *chOption, HWND *hwndParent)
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{
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UCHAR ch = *szCmdLine++;
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if(ch == '-' || ch == '/')
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ch = *szCmdLine++;
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if(ch >= 'A' && ch <= 'Z')
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ch += 'a' - 'A'; //convert to lower case
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*chOption = ch;
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ch = *szCmdLine++;
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if(ch == ':')
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ch = *szCmdLine++;
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while(ch == ' ' || ch == '\t')
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ch = *szCmdLine++;
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if(isdigit(ch))
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{
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unsigned int i = _wtoi(szCmdLine - 1);
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*hwndParent = (HWND)i;
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}
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else
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*hwndParent = NULL;
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}
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//
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// Entrypoint for screen-saver: it's just a normal win32 app!
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//
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int CALLBACK wWinMain (HINSTANCE hInst, HINSTANCE hPrev, LPWSTR lpCmdLine, int iCmdShow)
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{
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HWND hwndParent;
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UCHAR chOption;
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// Make sure that only 1 instance runs at a time -
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// Win98 seems to want us to restart every 5 seconds!!
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if(FindWindowEx(NULL, NULL, APPNAME, APPNAME))
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{
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return 0;
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}
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LoadSettings();
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ParseCommandLine(lpCmdLine, &chOption, &hwndParent);
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switch(chOption)
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{
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case 's': return ScreenSaver(NULL); // screen save
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case 'p': return ScreenSaver(hwndParent); // preview in small window
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case 'a': return ChangePassword(hwndParent); // ask for password
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case 'c': return Configure(hwndParent); // configuration dialog
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default: return Configure(hwndParent); // configuration dialog
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}
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return 0;
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}
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