// Name: display.cpp
// Purpose: MSW Implementation of wxDisplay class
// Author: Royce Mitchell III
-// Modified by:
+// Modified by: VZ (resolutions enumeration/change support, DirectDraw, ...)
// Created: 06/21/02
// RCS-ID: $Id$
-// Copyright: (c) wxWindows team
+// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// headers
// ---------------------------------------------------------------------------
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "display.h"
#endif
#if wxUSE_DISPLAY
#ifndef WX_PRECOMP
+ #include "wx/app.h"
#include "wx/dynarray.h"
+ #include "wx/frame.h"
#endif
+#include "wx/dynload.h"
+
#include "wx/display.h"
// the following define is necessary to access the multi-monitor function
// declarations in a manner safe to use w/ Windows 95
-// JACS: not used for now until we're clear about the legality
-// of distributing multimon.h. Meanwhile you can download the file
-// yourself from:
-// http://www.microsoft.com/msj/0697/monitor/monitortextfigs.htm#fig4
-
-#if 0
#define COMPILE_MULTIMON_STUBS
-#include "wx/msw/multimon.h"
+
+// if you don't have multimon.h you can download the file from:
+//
+// http://www.microsoft.com/msj/0697/monitor/monitortextfigs.htm#fig4
+//
+
+#ifdef _MSC_VER
+ // as (m)any standard header(s), this one doesn't compile without warnings
+ // with VC++ 6 <sigh>
+ #pragma warning(disable:4706)
#endif
-// ---------------------------------------------------------------------------
-// constants
-// ---------------------------------------------------------------------------
+#include <multimon.h>
-// ---------------------------------------------------------------------------
-// private functions
-// ---------------------------------------------------------------------------
+#ifdef _MSC_VER
+ #pragma warning(default:4706)
+#endif
+
+#include <ddraw.h>
-void wxmswInitDisplayRectArray();
+// we don't want to link with ddraw.lib which contains the real
+// IID_IDirectDraw2 definition
+const GUID wxIID_IDirectDraw2 =
+ { 0xB3A6F3E0, 0x2B43, 0x11CF, { 0xA2,0xDE,0x00,0xAA,0x00,0xB9,0x33,0x56 } };
// ----------------------------------------------------------------------------
-// private classes
+// macros
// ----------------------------------------------------------------------------
-class wxmswDisplayInfo;
+#ifdef _UNICODE
+ #define WINFUNC(x) _T(#x) L"W"
+#else
+ #define WINFUNC(x) #x "A"
+#endif
+
+// ----------------------------------------------------------------------------
+// typedefs for dynamically loaded Windows functions
+// ----------------------------------------------------------------------------
-WX_DECLARE_OBJARRAY(wxmswDisplayInfo, wxmswDisplayInfoArray);
+typedef LONG (WINAPI *ChangeDisplaySettingsEx_t)(LPCTSTR lpszDeviceName,
+ LPDEVMODE lpDevMode,
+ HWND hwnd,
+ DWORD dwFlags,
+ LPVOID lParam);
-class wxmswDisplayInfo
+typedef BOOL (PASCAL *DDEnumExCallback_t)(GUID *pGuid,
+ LPTSTR driverDescription,
+ LPTSTR driverName,
+ LPVOID lpContext,
+ HMONITOR hmon);
+
+typedef HRESULT (WINAPI *DirectDrawEnumerateEx_t)(DDEnumExCallback_t lpCallback,
+ LPVOID lpContext,
+ DWORD dwFlags);
+
+typedef HRESULT (WINAPI *DirectDrawCreate_t)(GUID *lpGUID,
+ LPDIRECTDRAW *lplpDD,
+ IUnknown *pUnkOuter);
+
+// ----------------------------------------------------------------------------
+// private classes
+// ----------------------------------------------------------------------------
+
+class wxDisplayInfo
{
public:
- HMONITOR m_hmon;
- DISPLAY_DEVICE m_dd;
+ // handle of this monitor used by MonitorXXX() functions, never NULL
+ HMONITOR m_hmon;
+
+ // IDirectDraw object used to control this display, may be NULL
+ IDirectDraw2 *m_pDD2;
+
+ // DirectDraw GUID for this display, only valid when using DirectDraw
+ GUID m_guid;
+
+ // the entire area of this monitor in virtual screen coordinates
wxRect m_rect;
- int m_depth;
+
+ // the display device name for this monitor, empty initially and retrieved
+ // on demand by DoGetName()
+ wxString m_devName;
+
+ wxDisplayInfo() { m_hmon = NULL; m_pDD2 = NULL; }
+ ~wxDisplayInfo() { if ( m_pDD2 ) m_pDD2->Release(); }
};
-wxmswDisplayInfoArray* g_wxmswDisplayInfoArray = 0;
+WX_DECLARE_OBJARRAY(wxDisplayInfo, wxDisplayInfoArray);
+#include "wx/arrimpl.cpp"
+WX_DEFINE_OBJARRAY(wxDisplayInfoArray);
-#include <wx/arrimpl.cpp> // this is a magic incantation which must be done!
-WX_DEFINE_OBJARRAY(wxmswDisplayInfoArray);
+// this module is used to cleanup gs_displays array
+class wxDisplayModule : public wxModule
+{
+public:
+ virtual bool OnInit() { return true; }
+ virtual void OnExit();
+
+ DECLARE_DYNAMIC_CLASS(wxDisplayModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxDisplayModule, wxModule)
+
+// ----------------------------------------------------------------------------
+// globals
+// ----------------------------------------------------------------------------
+
+// do we use DirectX?
+static bool gs_useDirectX = false;
+
+// dynamically resolved DirectDrawCreate()
+static DirectDrawCreate_t gs_DirectDrawCreate = NULL;
+
+// this is not really MT-unsafe as wxDisplay is only going to be used from the
+// main thread, i.e. we consider that it's a GUI class and so don't protect it
+static wxDisplayInfoArray *gs_displays = NULL;
// ===========================================================================
// implementation
// ===========================================================================
-BOOL CALLBACK wxmswMonitorEnumProc (
- HMONITOR hMonitor, // handle to display monitor
- HDC hdcMonitor, // handle to monitor-appropriate device context
- LPRECT lprcMonitor, // pointer to monitor intersection rectangle
- LPARAM dwData // data passed from EnumDisplayMonitors
+// ----------------------------------------------------------------------------
+// callbacks for monitor/modes enumeration stuff
+// ----------------------------------------------------------------------------
+
+static BOOL CALLBACK wxmswMonitorEnumProc (
+ HMONITOR hMonitor, // handle to display monitor
+ HDC WXUNUSED(hdcMonitor), // handle to monitor-appropriate device context
+ LPRECT lprcMonitor, // pointer to monitor intersection rectangle
+ LPARAM WXUNUSED(dwData) // data passed from EnumDisplayMonitors (unused)
)
{
- wxmswDisplayInfo* info = new wxmswDisplayInfo();
+ wxDisplayInfo *info = new wxDisplayInfo();
+
+ // we need hMonitor to be able to map display id to it which is needed for
+ // MonitorXXX() functions, in particular MonitorFromPoint()
info->m_hmon = hMonitor;
+
+ // we also store the display geometry
info->m_rect.SetX ( lprcMonitor->left );
info->m_rect.SetY ( lprcMonitor->top );
info->m_rect.SetWidth ( lprcMonitor->right - lprcMonitor->left );
info->m_rect.SetHeight ( lprcMonitor->bottom - lprcMonitor->top );
+
// now add this monitor to the array
- g_wxmswDisplayInfoArray->Add ( info );
+ gs_displays->Add(info);
- return TRUE; // continue the enumeration
+ // continue the enumeration
+ return true;
}
-class wxmswDisplayModule : public wxModule
+BOOL PASCAL
+wxDDEnumExCallback(GUID *pGuid,
+ LPTSTR WXUNUSED(driverDescription),
+ LPTSTR driverName,
+ LPVOID WXUNUSED(lpContext),
+ HMONITOR hmon)
{
- DECLARE_DYNAMIC_CLASS(wxmswDisplayModule)
-public:
- wxmswDisplayModule() {}
- bool OnInit();
- void OnExit();
-};
+ if ( pGuid )
+ {
+ wxDisplayInfo *info = new wxDisplayInfo();
+
+ info->m_hmon = hmon;
+ info->m_guid = *pGuid;
+ info->m_devName = driverName;
+
+ gs_displays->Add(info);
+ }
+ //else: we're called for the primary monitor, skip it
-IMPLEMENT_DYNAMIC_CLASS(wxmswDisplayModule, wxModule)
+ // continue the enumeration
+ return true;
+}
-bool wxmswDisplayModule::OnInit()
+HRESULT WINAPI wxDDEnumModesCallback(LPDDSURFACEDESC lpDDSurfaceDesc,
+ LPVOID lpContext)
{
- g_wxmswDisplayInfoArray = new wxmswDisplayInfoArray();
- if ( !g_wxmswDisplayInfoArray )
+ // we need at least the mode size
+ static const DWORD FLAGS_REQUIRED = DDSD_HEIGHT | DDSD_WIDTH;
+ if ( (lpDDSurfaceDesc->dwFlags & FLAGS_REQUIRED) == FLAGS_REQUIRED )
{
- wxFAIL_MSG(wxT("Couldn't allocate array for display information"));
- return FALSE;
+ wxArrayVideoModes * const modes = (wxArrayVideoModes *)lpContext;
+
+ modes->Add(wxVideoMode(lpDDSurfaceDesc->dwWidth,
+ lpDDSurfaceDesc->dwHeight,
+ lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount,
+ lpDDSurfaceDesc->dwRefreshRate));
}
- // Royce3: I'm assuming that the monitor's are enumerated in the same
- // order as the calls to EnumDisplayDevices below. We shall soon see
- // if that assumption is correct.
- if ( !EnumDisplayMonitors ( NULL, NULL, wxmswMonitorEnumProc, 0 ) )
- wxLogLastError(wxT("EnumDisplayMonitors"));
+ // continue the enumeration
+ return DDENUMRET_OK;
+}
- size_t iDevNum = 0, count = g_wxmswDisplayInfoArray->Count();
- while ( iDevNum < count )
- {
- wxmswDisplayInfo& info = (*g_wxmswDisplayInfoArray)[iDevNum];
+// ----------------------------------------------------------------------------
+// local functions
+// ----------------------------------------------------------------------------
- // MSDN: Before calling EnumDisplayDevices, you must initialize the cb
- // member of DISPLAY_DEVICE to the size, in bytes, of DISPLAY_DEVICE
- info.m_dd.cb = sizeof(info.m_dd);
+// initialize gs_displays using DirectX functions
+static bool DoInitDirectX()
+{
+#if wxUSE_LOG
+ // suppress the errors if ddraw.dll is not found
+ wxLog::EnableLogging(false);
+#endif
- if ( !EnumDisplayDevices ( NULL, iDevNum, &info.m_dd, 0 ) )
- wxLogLastError(wxT("EnumDisplayDevices"));
+ wxDynamicLibrary dllDX(_T("ddraw.dll"));
- // get this display's Depth
- DEVMODE devmode;
- memset ( &devmode, 0, sizeof(devmode) );
+#if wxUSE_LOG
+ wxLog::EnableLogging();
+#endif
- // MSDN: Before calling EnumDisplaySettings, set the dmSize member to
- // sizeof(DEVMODE), and set the dmDriverExtra member to indicate the size,
- // in bytes, of the additional space available to receive private
- // driver-data.
- devmode.dmSize = sizeof(devmode);
- devmode.dmDriverExtra = 0;
+ if ( !dllDX.IsLoaded() )
+ return false;
- if ( !EnumDisplaySettings ( info.m_dd.DeviceName, ENUM_CURRENT_SETTINGS, &devmode ) )
- {
- wxLogLastError(wxT("EnumDisplaySettings"));
- devmode.dmFields = 0;
- }
+ DirectDrawEnumerateEx_t pDDEnumEx = (DirectDrawEnumerateEx_t)
+ dllDX.GetSymbol(WINFUNC(DirectDrawEnumerateEx));
+ if ( !pDDEnumEx )
+ return false;
- if ( !(devmode.dmFields&DM_BITSPERPEL) )
- info.m_depth = -1;
- else
- info.m_depth = devmode.dmBitsPerPel;
+ // we'll also need DirectDrawCreate() later, resolve it right now
+ gs_DirectDrawCreate = (DirectDrawCreate_t)
+ dllDX.GetSymbol(_T("DirectDrawCreate"));
+ if ( !gs_DirectDrawCreate )
+ return false;
+
+ if ( (*pDDEnumEx)(wxDDEnumExCallback,
+ NULL,
+ DDENUM_ATTACHEDSECONDARYDEVICES) != DD_OK )
+ {
+ return false;
+ }
+ // ok, it seems like we're going to use DirectDraw and so we're going to
+ // need ddraw.dll all the time, don't unload it
+ dllDX.Detach();
+
+ return true;
+}
+
+// initialize gs_displays using the standard Windows functions
+static void DoInitStdWindows()
+{
+ // enumerate all displays
+ if ( !::EnumDisplayMonitors(NULL, NULL, wxmswMonitorEnumProc, 0) )
+ {
+ wxLogLastError(wxT("EnumDisplayMonitors"));
- iDevNum++;
+ // TODO: still create at least one (valid) entry in gs_displays for the
+ // primary display!
}
- return TRUE;
}
-void wxmswDisplayModule::OnExit()
+// this function must be called before accessing gs_displays array as it
+// creates and initializes it
+static void InitDisplays()
{
- size_t count = g_wxmswDisplayInfoArray->Count();
- while ( count-- )
+ if ( gs_displays )
+ return;
+
+ gs_displays = new wxDisplayInfoArray();
+
+ if ( !gs_useDirectX || !DoInitDirectX() )
{
- wxmswDisplayInfo* info = g_wxmswDisplayInfoArray->Detach ( count );
- delete info;
+ // either we were told not to try to use DirectX or fall back to std
+ // functions if DirectX method failed
+ gs_useDirectX = false;
+
+ DoInitStdWindows();
}
- delete g_wxmswDisplayInfoArray;
- g_wxmswDisplayInfoArray = 0;
+}
+
+// convert a DEVMODE to our wxVideoMode
+wxVideoMode ConvertToVideoMode(const DEVMODE& dm)
+{
+ // note that dmDisplayFrequency may be 0 or 1 meaning "standard one" and
+ // although 0 is ok for us we don't want to return modes with 1hz refresh
+ return wxVideoMode(dm.dmPelsWidth,
+ dm.dmPelsHeight,
+ dm.dmBitsPerPel,
+ dm.dmDisplayFrequency > 1 ? dm.dmDisplayFrequency : 0);
+}
+
+// emulation of ChangeDisplaySettingsEx() for Win95
+LONG WINAPI ChangeDisplaySettingsExForWin95(LPCTSTR WXUNUSED(lpszDeviceName),
+ LPDEVMODE lpDevMode,
+ HWND WXUNUSED(hwnd),
+ DWORD dwFlags,
+ LPVOID WXUNUSED(lParam))
+{
+ return ::ChangeDisplaySettings(lpDevMode, dwFlags);
+}
+
+// ----------------------------------------------------------------------------
+// wxDisplayModule
+// ----------------------------------------------------------------------------
+
+void wxDisplayModule::OnExit()
+{
+ delete gs_displays;
}
// ---------------------------------------------------------------------------
// wxDisplay
// ---------------------------------------------------------------------------
+/* static */
+void wxDisplay::UseDirectX(bool useDX)
+{
+ wxCHECK_RET( !gs_displays, _T("it is too late to call UseDirectX") );
+
+ gs_useDirectX = useDX;
+}
+
+// helper of GetFromPoint() and GetFromWindow()
+static int DisplayFromHMONITOR(HMONITOR hmon)
+{
+ if ( hmon )
+ {
+ const size_t count = wxDisplay::GetCount();
+
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( hmon == (*gs_displays)[n].m_hmon )
+ return n;
+ }
+ }
+
+ return wxNOT_FOUND;
+}
+
+/* static */
size_t wxDisplayBase::GetCount()
{
- return GetSystemMetrics ( SM_CMONITORS );
+ InitDisplays();
+
+ // I'm not sure if they really always return the same thing and if this is
+ // not true I'd like to know in which situation does it happen
+ wxASSERT_MSG( gs_displays->GetCount() == (size_t)::GetSystemMetrics(SM_CMONITORS),
+ _T("So how many displays does this system have?") );
+
+ return gs_displays->GetCount();
}
+/* static */
int wxDisplayBase::GetFromPoint ( const wxPoint& pt )
{
POINT pt2;
pt2.x = pt.x;
pt2.y = pt.y;
- HMONITOR hmon = MonitorFromPoint ( pt2, 0 );
- if ( !hmon )
- return -1;
- size_t count = wxDisplayBase::GetCount(), index;
+ return DisplayFromHMONITOR(::MonitorFromPoint(pt2, MONITOR_DEFAULTTONULL));
+}
+
+/* static */
+int wxDisplayBase::GetFromWindow(wxWindow *window)
+{
+ return DisplayFromHMONITOR
+ (
+ ::MonitorFromWindow(GetHwndOf(window), MONITOR_DEFAULTTONULL)
+ );
+}
+
+// ----------------------------------------------------------------------------
+// wxDisplay ctor/dtor
+// ----------------------------------------------------------------------------
- for ( index = 0; index < count; index++ )
+wxDisplay::wxDisplay ( size_t n )
+ : wxDisplayBase ( n )
+{
+ // if we do this in ctor we won't have to call it from all the member
+ // functions
+ InitDisplays();
+
+ if ( gs_useDirectX )
{
- if ( hmon == (*g_wxmswDisplayInfoArray)[index].m_hmon )
- return index;
+ wxDisplayInfo& dpyInfo = (*gs_displays)[n];
+
+ LPDIRECTDRAW2& pDD2 = dpyInfo.m_pDD2;
+ if ( !pDD2 )
+ {
+ if ( !gs_DirectDrawCreate )
+ {
+ // what to do??
+ return;
+ }
+
+ IDirectDraw *pDD;
+ HRESULT hr = (*gs_DirectDrawCreate)(&dpyInfo.m_guid, &pDD, NULL);
+
+ if ( FAILED(hr) || !pDD )
+ {
+ // what to do??
+ wxLogApiError(_T("DirectDrawCreate"), hr);
+ }
+ else // got IDirectDraw, we want IDirectDraw2
+ {
+ hr = pDD->QueryInterface(wxIID_IDirectDraw2, (void **)&pDD2);
+ if ( FAILED(hr) || !pDD2 )
+ {
+ wxLogApiError(_T("IDirectDraw::QueryInterface(IDD2)"), hr);
+ }
+
+ pDD->Release();
+ }
+ }
+ //else: DirectDraw object corresponding to our display already exists
+
+ // increment its ref count to account for Release() in dtor
+ //
+ // NB: pDD2 will be only really Release()d when gs_displays is
+ // destroyed which is ok as we don't want to recreate DD objects
+ // all the time
+ pDD2->AddRef();
}
+}
+
+wxDisplay::~wxDisplay()
+{
+ wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
- return -1;
+ LPDIRECTDRAW2& pDD2 = dpyInfo.m_pDD2;
+ if ( pDD2 )
+ {
+ pDD2->Release();
+ }
}
-wxDisplay::wxDisplay ( size_t index ) : wxDisplayBase ( index )
+// ----------------------------------------------------------------------------
+// wxDisplay simple accessors
+// ----------------------------------------------------------------------------
+
+bool wxDisplay::IsOk() const
{
+ return m_index < GetCount() &&
+ (!gs_useDirectX || (*gs_displays)[m_index].m_pDD2);
}
wxRect wxDisplay::GetGeometry() const
{
- return (*g_wxmswDisplayInfoArray)[m_index].m_rect;
+ wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
+ wxRect& rect = dpyInfo.m_rect;
+ if ( !rect.width )
+ {
+ MONITORINFO monInfo;
+ wxZeroMemory(monInfo);
+ monInfo.cbSize = sizeof(monInfo);
+
+ if ( !::GetMonitorInfo(dpyInfo.m_hmon, &monInfo) )
+ {
+ wxLogLastError(_T("GetMonitorInfo"));
+ }
+ else
+ {
+ wxCopyRECTToRect(monInfo.rcMonitor, rect);
+ }
+ }
+
+ return rect;
}
-int wxDisplay::GetDepth() const
+wxString wxDisplay::GetName() const
{
- return (*g_wxmswDisplayInfoArray)[m_index].m_depth;
+ wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
+ if ( dpyInfo.m_devName.empty() )
+ {
+ MONITORINFOEX monInfo;
+ wxZeroMemory(monInfo);
+ monInfo.cbSize = sizeof(monInfo);
+
+ // NB: Cast from MONITORINFOEX* to MONITORINFO* is done because
+ // Mingw headers - unlike the ones from Microsoft's Platform SDK -
+ // don't derive the former from the latter in C++ mode and so
+ // the pointer's type is not converted implicitly.
+ if ( !::GetMonitorInfo(dpyInfo.m_hmon, (LPMONITORINFO)&monInfo) )
+ {
+ wxLogLastError(_T("GetMonitorInfo"));
+ }
+ else
+ {
+ dpyInfo.m_devName = monInfo.szDevice;
+ }
+ }
+
+ return dpyInfo.m_devName;
}
-wxString wxDisplay::GetName() const
+wxString wxDisplay::GetNameForEnumSettings() const
{
- return wxString ( (*g_wxmswDisplayInfoArray)[m_index].m_dd.DeviceName );
+ int major, minor;
+ const bool isWin95 = wxGetOsVersion(&major, &minor) == wxWIN95 &&
+ major == 4 && minor == 0;
+
+ // the first parameter of EnumDisplaySettings() must be NULL under Win95
+ // according to MSDN but GetMonitorInfo() stub in multimon.h still returns
+ // something even in this case, so we have to correct this manually
+ wxString name;
+ if ( !isWin95 )
+ name = GetName();
+
+ return name;
}
-#endif//wxUSE_DISPLAY
+// ----------------------------------------------------------------------------
+// video modes enumeration
+// ----------------------------------------------------------------------------
+
+wxArrayVideoModes
+wxDisplay::DoGetModesDirectX(const wxVideoMode& WXUNUSED(modeMatch)) const
+{
+ wxArrayVideoModes modes;
+
+ IDirectDraw2 *pDD = (*gs_displays)[m_index].m_pDD2;
+
+ if ( pDD )
+ {
+ HRESULT hr = pDD->EnumDisplayModes
+ (
+ DDEDM_REFRESHRATES,
+ NULL, // all modes (TODO: use modeMatch!)
+ &modes, // callback parameter
+ wxDDEnumModesCallback
+ );
+
+ if ( FAILED(hr) )
+ {
+ wxLogApiError(_T("IDirectDraw::EnumDisplayModes"), hr);
+ }
+ }
+
+ return modes;
+}
+
+wxArrayVideoModes
+wxDisplay::DoGetModesWindows(const wxVideoMode& modeMatch) const
+{
+ wxArrayVideoModes modes;
+
+ const wxString name = GetNameForEnumSettings();
+
+ const wxChar * const deviceName = name.empty() ? NULL : name.c_str();
+
+ DEVMODE dm;
+ for ( int iModeNum = 0;
+ ::EnumDisplaySettings(deviceName, iModeNum, &dm);
+ iModeNum++ )
+ {
+ const wxVideoMode mode = ConvertToVideoMode(dm);
+ if ( mode.Matches(modeMatch) )
+ {
+ modes.Add(mode);
+ }
+ }
+
+ return modes;
+}
+
+wxArrayVideoModes wxDisplay::GetModes(const wxVideoMode& modeMatch) const
+{
+ return gs_useDirectX ? DoGetModesDirectX(modeMatch)
+ : DoGetModesWindows(modeMatch);
+}
+
+wxVideoMode wxDisplay::GetCurrentMode() const
+{
+ wxVideoMode mode;
+
+ const wxString name = GetNameForEnumSettings();
+
+ DEVMODE dm;
+ if ( !::EnumDisplaySettings(name.empty() ? NULL : name.c_str(),
+ ENUM_CURRENT_SETTINGS,
+ &dm) )
+ {
+ wxLogLastError(_T("EnumDisplaySettings(ENUM_CURRENT_SETTINGS)"));
+ }
+ else
+ {
+ mode = ConvertToVideoMode(dm);
+ }
+
+ return mode;
+}
+
+// ----------------------------------------------------------------------------
+// video mode switching
+// ----------------------------------------------------------------------------
+
+bool wxDisplay::DoChangeModeDirectX(const wxVideoMode& mode)
+{
+ IDirectDraw2 *pDD = (*gs_displays)[m_index].m_pDD2;
+ if ( !pDD )
+ return false;
+
+ wxWindow *winTop = wxTheApp->GetTopWindow();
+ wxCHECK_MSG( winTop, false, _T("top level window required for DirectX") );
+
+ HRESULT hr = pDD->SetCooperativeLevel
+ (
+ GetHwndOf(winTop),
+ DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN
+ );
+ if ( FAILED(hr) )
+ {
+ wxLogApiError(_T("IDirectDraw::SetCooperativeLevel"), hr);
+
+ return false;
+ }
+
+ hr = pDD->SetDisplayMode(mode.w, mode.h, mode.bpp, mode.refresh, 0);
+ if ( FAILED(hr) )
+ {
+ wxLogApiError(_T("IDirectDraw::SetDisplayMode"), hr);
+
+ return false;
+ }
+
+
+ return true;
+}
+
+bool wxDisplay::DoChangeModeWindows(const wxVideoMode& mode)
+{
+ // prepare ChangeDisplaySettingsEx() parameters
+ DEVMODE dm,
+ *pDevMode;
+ int flags;
+
+ if ( mode == wxDefaultVideoMode )
+ {
+ // reset the video mode to default
+ pDevMode = NULL;
+ flags = 0;
+ }
+ else // change to the given mode
+ {
+ wxCHECK_MSG( mode.w && mode.h, false,
+ _T("at least the width and height must be specified") );
+
+ wxZeroMemory(dm);
+ dm.dmSize = sizeof(dm);
+ dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
+ dm.dmPelsWidth = mode.w;
+ dm.dmPelsHeight = mode.h;
+
+ if ( mode.bpp )
+ {
+ dm.dmFields |= DM_BITSPERPEL;
+ dm.dmBitsPerPel = mode.bpp;
+ }
+
+ if ( mode.refresh )
+ {
+ dm.dmFields |= DM_DISPLAYFREQUENCY;
+ dm.dmDisplayFrequency = mode.refresh;
+ }
+
+ pDevMode = &dm;
+
+ flags = CDS_FULLSCREEN;
+ }
+
+
+ // get pointer to the function dynamically
+ //
+ // we're only called from the main thread, so it's ok to use static
+ // variable
+ static ChangeDisplaySettingsEx_t pfnChangeDisplaySettingsEx = NULL;
+ if ( !pfnChangeDisplaySettingsEx )
+ {
+ wxDynamicLibrary dllUser32(_T("user32.dll"));
+ if ( dllUser32.IsLoaded() )
+ {
+ pfnChangeDisplaySettingsEx = (ChangeDisplaySettingsEx_t)
+ dllUser32.GetSymbol(WINFUNC(ChangeDisplaySettingsEx));
+ }
+ //else: huh, no user32.dll??
+
+ if ( !pfnChangeDisplaySettingsEx )
+ {
+ // we must be under Win95 and so there is no multiple monitors
+ // support anyhow
+ pfnChangeDisplaySettingsEx = ChangeDisplaySettingsExForWin95;
+ }
+ }
+
+ // do change the mode
+ switch ( pfnChangeDisplaySettingsEx
+ (
+ GetName(), // display name
+ pDevMode, // dev mode or NULL to reset
+ NULL, // reserved
+ flags,
+ NULL // pointer to video parameters (not used)
+ ) )
+ {
+ case DISP_CHANGE_SUCCESSFUL:
+ // ok
+ {
+ // If we have a top-level, full-screen frame, emulate
+ // the DirectX behavior and resize it. This makes this
+ // API quite a bit easier to use.
+ wxWindow *winTop = wxTheApp->GetTopWindow();
+ wxFrame *frameTop = wxDynamicCast(winTop, wxFrame);
+ if (frameTop && frameTop->IsFullScreen())
+ {
+ wxVideoMode current = GetCurrentMode();
+ frameTop->SetClientSize(current.w, current.h);
+ }
+ }
+ return true;
+
+ case DISP_CHANGE_BADMODE:
+ // don't complain about this, this is the only "expected" error
+ break;
+
+ default:
+ wxFAIL_MSG( _T("unexpected ChangeDisplaySettingsEx() return value") );
+ }
+
+ return false;
+}
+
+bool wxDisplay::ChangeMode(const wxVideoMode& mode)
+{
+ return gs_useDirectX ? DoChangeModeDirectX(mode)
+ : DoChangeModeWindows(mode);
+}
+
+#endif // wxUSE_DISPLAY
+
projects / wxWidgets.git / blobdiff