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support for optionnally using DirectX for display manipulations

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20045 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-04-07 00:30:18 +00:00
parent d515343ca2
commit 06efac1f8d
4 changed files with 365 additions and 36 deletions
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380
src/msw/display.cpp
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@@ -2,7 +2,7 @@
// 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
@@ -48,7 +48,7 @@
//
#ifdef _MSC_VER
// as (m)any standard header, this one doesn't compile without warnings
// as (m)any standard header(s), this one doesn't compile without warnings
// with VC++ 6 <sigh>
#pragma warning(disable:4706)
#endif
@@ -59,15 +59,25 @@
#pragma warning(default:4706)
#endif
#include <ddraw.h>
// 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 } };
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
#ifdef _UNICODE
#define MAKE_WFUNC(x) #x "W"
#define WINFUNC(x) L ## MAKE_WFUNC(x)
#define WINFUNC(x) _T(#x) L"W"
#else
#define WINFUNC(x) #x "A"
#endif
// ----------------------------------------------------------------------------
// typedefs
// typedefs for dynamically loaded Windows functions
// ----------------------------------------------------------------------------
typedef LONG (WINAPI *ChangeDisplaySettingsEx_t)(LPCTSTR lpszDeviceName,
@@ -76,6 +86,20 @@ typedef LONG (WINAPI *ChangeDisplaySettingsEx_t)(LPCTSTR lpszDeviceName,
DWORD dwFlags,
LPVOID lParam);
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
// ----------------------------------------------------------------------------
@@ -86,6 +110,12 @@ public:
// 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;
@@ -93,23 +123,19 @@ public:
// on demand by DoGetName()
wxString m_devName;
wxDisplayInfo() { m_hmon = NULL; }
wxDisplayInfo() { m_hmon = NULL; m_pDD2 = NULL; }
~wxDisplayInfo() { if ( m_pDD2 ) m_pDD2->Release(); }
};
WX_DECLARE_OBJARRAY(wxDisplayInfo, wxDisplayInfoArray);
#include "wx/arrimpl.cpp"
WX_DEFINE_OBJARRAY(wxDisplayInfoArray);
// 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 *g_displays = NULL;
// this module is used to cleanup g_displays array
// this module is used to cleanup gs_displays array
class wxDisplayModule : public wxModule
{
public:
virtual bool OnInit() { return TRUE; }
virtual bool OnInit() { return true; }
virtual void OnExit();
DECLARE_DYNAMIC_CLASS(wxDisplayModule)
@@ -117,12 +143,26 @@ public:
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
// ===========================================================================
// ----------------------------------------------------------------------------
// local functions
// callbacks for monitor/modes enumeration stuff
// ----------------------------------------------------------------------------
static BOOL CALLBACK wxmswMonitorEnumProc (
@@ -132,7 +172,7 @@ static BOOL CALLBACK wxmswMonitorEnumProc (
LPARAM dwData // data passed from EnumDisplayMonitors (unused)
)
{
wxDisplayInfo* info = new wxDisplayInfo();
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()
@@ -145,31 +185,128 @@ static BOOL CALLBACK wxmswMonitorEnumProc (
info->m_rect.SetHeight ( lprcMonitor->bottom - lprcMonitor->top );
// now add this monitor to the array
g_displays->Add(info);
gs_displays->Add(info);
// continue the enumeration
return TRUE;
return true;
}
// this function must be called before accessing g_displays array as it
// creates and initializes it
static void InitDisplays()
BOOL PASCAL
wxDDEnumExCallback(GUID *pGuid,
LPTSTR driverDescription,
LPTSTR driverName,
LPVOID lpContext,
HMONITOR hmon)
{
if ( g_displays )
return;
if ( pGuid )
{
wxDisplayInfo *info = new wxDisplayInfo();
g_displays = new wxDisplayInfoArray();
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
// continue the enumeration
return true;
}
HRESULT WINAPI wxDDEnumModesCallback(LPDDSURFACEDESC lpDDSurfaceDesc,
LPVOID lpContext)
{
// we need at least the mode size
static const int FLAGS_REQUIRED = DDSD_HEIGHT | DDSD_WIDTH;
if ( (lpDDSurfaceDesc->dwFlags & FLAGS_REQUIRED) == FLAGS_REQUIRED )
{
wxArrayVideoModes * const modes = (wxArrayVideoModes *)lpContext;
modes->Add(wxVideoMode(lpDDSurfaceDesc->dwWidth,
lpDDSurfaceDesc->dwHeight,
lpDDSurfaceDesc->ddpfPixelFormat.dwRGBBitCount,
lpDDSurfaceDesc->dwRefreshRate));
}
// continue the enumeration
return DDENUMRET_OK;
}
// ----------------------------------------------------------------------------
// local functions
// ----------------------------------------------------------------------------
// initialize gs_displays using DirectX functions
static bool DoInitDirectX()
{
// suppress the errors if ddraw.dll is not found
wxLog::EnableLogging(false);
wxDynamicLibrary dllDX(_T("ddraw.dll"));
wxLog::EnableLogging(true);
if ( !dllDX.IsLoaded() )
return false;
DirectDrawEnumerateEx_t pDDEnumEx = (DirectDrawEnumerateEx_t)
dllDX.GetSymbol(WINFUNC(DirectDrawEnumerateEx));
if ( !pDDEnumEx )
return false;
// 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"));
// TODO: still create at least one (valid) entry in g_displays for the
// TODO: still create at least one (valid) entry in gs_displays for the
// primary display!
}
}
// this function must be called before accessing gs_displays array as it
// creates and initializes it
static void InitDisplays()
{
if ( gs_displays )
return;
gs_displays = new wxDisplayInfoArray();
if ( gs_useDirectX && !DoInitDirectX() )
{
// either we were told not to try to use DirectX or fall back to std
// functions if DirectX method failed
gs_useDirectX = false;
DoInitStdWindows();
}
}
// convert a DEVMODE to our wxVideoMode
wxVideoMode ConvertToVideoMode(const DEVMODE& dm)
{
@@ -197,13 +334,21 @@ LONG WINAPI ChangeDisplaySettingsExForWin95(LPCTSTR WXUNUSED(lpszDeviceName),
void wxDisplayModule::OnExit()
{
delete g_displays;
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)
{
@@ -213,7 +358,7 @@ static int DisplayFromHMONITOR(HMONITOR hmon)
for ( size_t n = 0; n < count; n++ )
{
if ( hmon == (*g_displays)[n].m_hmon )
if ( hmon == (*gs_displays)[n].m_hmon )
return n;
}
}
@@ -228,10 +373,10 @@ size_t wxDisplayBase::GetCount()
// 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( g_displays->GetCount() == (size_t)::GetSystemMetrics(SM_CMONITORS),
wxASSERT_MSG( gs_displays->GetCount() == (size_t)::GetSystemMetrics(SM_CMONITORS),
_T("So how many displays does this system have?") );
return g_displays->GetCount();
return gs_displays->GetCount();
}
/* static */
@@ -253,22 +398,107 @@ int wxDisplayBase::GetFromWindow(wxWindow *window)
);
}
// ----------------------------------------------------------------------------
// wxDisplay ctor/dtor
// ----------------------------------------------------------------------------
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 )
{
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];
LPDIRECTDRAW2& pDD2 = dpyInfo.m_pDD2;
if ( pDD2 )
{
pDD2->Release();
}
}
// ----------------------------------------------------------------------------
// 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_displays)[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;
}
wxString wxDisplay::GetName() const
{
wxDisplayInfo& dpyInfo = (*g_displays)[m_index];
wxDisplayInfo& dpyInfo = (*gs_displays)[m_index];
if ( dpyInfo.m_devName.empty() )
{
MONITORINFOEX monInfo;
@@ -304,7 +534,38 @@ wxString wxDisplay::GetNameForEnumSettings() const
return name;
}
wxArrayVideoModes wxDisplay::GetModes(const wxVideoMode& modeMatch) const
// ----------------------------------------------------------------------------
// video modes enumeration
// ----------------------------------------------------------------------------
wxArrayVideoModes
wxDisplay::DoGetModesDirectX(const wxVideoMode& 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;
@@ -327,6 +588,12 @@ wxArrayVideoModes wxDisplay::GetModes(const wxVideoMode& modeMatch) const
return modes;
}
wxArrayVideoModes wxDisplay::GetModes(const wxVideoMode& modeMatch) const
{
return gs_useDirectX ? DoGetModesDirectX(modeMatch)
: DoGetModesWindows(modeMatch);
}
wxVideoMode wxDisplay::GetCurrentMode() const
{
wxVideoMode mode;
@@ -348,7 +615,44 @@ wxVideoMode wxDisplay::GetCurrentMode() const
return mode;
}
bool wxDisplay::ChangeMode(const wxVideoMode& 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,
@@ -363,7 +667,7 @@ bool wxDisplay::ChangeMode(const wxVideoMode& mode)
}
else // change to the given mode
{
wxCHECK_MSG( mode.w && mode.h, FALSE,
wxCHECK_MSG( mode.w && mode.h, false,
_T("at least the width and height must be specified") );
wxZeroMemory(dm);
@@ -425,7 +729,7 @@ bool wxDisplay::ChangeMode(const wxVideoMode& mode)
{
case DISP_CHANGE_SUCCESSFUL:
// ok
return TRUE;
return true;
case DISP_CHANGE_BADMODE:
// don't complain about this, this is the only "expected" error
@@ -435,7 +739,13 @@ bool wxDisplay::ChangeMode(const wxVideoMode& mode)
wxFAIL_MSG( _T("unexpected ChangeDisplaySettingsEx() return value") );
}
return FALSE;
return false;
}
bool wxDisplay::ChangeMode(const wxVideoMode& mode)
{
return gs_useDirectX ? DoChangeModeDirectX(mode)
: DoChangeModeWindows(mode);
}
#endif // wxUSE_DISPLAY