143 lines
2.9 KiB
C++
143 lines
2.9 KiB
C++
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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ForceDisplayMode.cpp
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Abstract:
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This shim is for games that require a specific resolution to run at.
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It takes a command line to specify the resolution: width in pixels, height
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in pixels,bits per pixel if you don't specify one or more of those, we'll
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use the current setting.
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eg: 1024,768 will change resolution to 1024x768.
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eg: ,,16 will change the color depth to 16 bit.
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Notes:
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This is a general purpose shim.
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History:
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11/08/2000 maonis Created (adopted from Force640x480x8 and Force640x480x16 shims)
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03/13/2001 robkenny Converted to CString
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(ForceDisplayMode)
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#include "ShimHookMacro.h"
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// This module has been given an official blessing to use the str routines.
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#include "LegalStr.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_END
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DWORD g_dmPelsWidth = 0;
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DWORD g_dmPelsHeight = 0;
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DWORD g_dmBitsPerPel = 0;
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VOID
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ParseCommandLine(
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LPCSTR lpCommandLine
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)
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{
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LPSTR szCommandLine = (LPSTR) malloc(strlen(lpCommandLine) + 1);
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if (!szCommandLine) {
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DPFN( eDbgLevelError,
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"[ParseCommandLine] not enough memory\n");
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return;
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}
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strcpy(szCommandLine, lpCommandLine);
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char *token, *szCurr = szCommandLine;
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if (token = strchr(szCurr, ',')) {
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*token = '\0';
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g_dmPelsWidth = atol(szCurr);
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szCurr = token + 1;
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if (token = strchr(szCurr, ',')) {
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*token = '\0';
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g_dmBitsPerPel = atol(token + 1);
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}
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g_dmPelsHeight = atol(szCurr);
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} else {
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g_dmPelsWidth = atol(szCurr);
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}
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DPFN( eDbgLevelError,
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"[ParseCommandLine] width = %d pixels; height = %d pixels; color depth = %d\n", g_dmPelsWidth, g_dmPelsHeight, g_dmBitsPerPel);
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free(szCommandLine);
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}
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VOID
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ChangeMode()
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{
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DEVMODEA dm;
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BOOL fNeedChange = FALSE;
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__try {
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EnumDisplaySettingsA(NULL, ENUM_CURRENT_SETTINGS, &dm);
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if (g_dmPelsWidth && g_dmPelsWidth != dm.dmPelsWidth) {
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dm.dmPelsWidth = g_dmPelsWidth;
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fNeedChange = TRUE;
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}
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if (g_dmPelsHeight && g_dmPelsHeight != dm.dmPelsHeight) {
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dm.dmPelsHeight = g_dmPelsHeight;
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fNeedChange = TRUE;
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}
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if (g_dmBitsPerPel && g_dmBitsPerPel != dm.dmBitsPerPel) {
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dm.dmBitsPerPel = g_dmBitsPerPel;
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fNeedChange = TRUE;
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}
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if (fNeedChange) {
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ChangeDisplaySettingsA(&dm, CDS_FULLSCREEN);
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}
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}
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__except(1) {
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DPFN( eDbgLevelWarning, "Exception trying to change mode");
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};
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason)
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{
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if (fdwReason == SHIM_STATIC_DLLS_INITIALIZED) {
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ParseCommandLine(COMMAND_LINE);
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ChangeMode();
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}
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return TRUE;
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}
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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HOOK_END
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IMPLEMENT_SHIM_END
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