diff options
Diffstat (limited to 'third_party/BaseClasses/winctrl.cpp')
| -rw-r--r-- | third_party/BaseClasses/winctrl.cpp | 2081 |
1 files changed, 0 insertions, 2081 deletions
diff --git a/third_party/BaseClasses/winctrl.cpp b/third_party/BaseClasses/winctrl.cpp deleted file mode 100644 index 4d1f52e3..00000000 --- a/third_party/BaseClasses/winctrl.cpp +++ /dev/null @@ -1,2081 +0,0 @@ -//------------------------------------------------------------------------------
-// File: WinCtrl.cpp
-//
-// Desc: DirectShow base classes - implements video control interface class.
-//
-// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
-//------------------------------------------------------------------------------
-
-
-#include <streams.h>
-#include <intsafe.h>
-#include <checkbmi.h>
-
-// The control interface methods require us to be connected
-
-#define CheckConnected(pin,code) \
-{ \
- if (pin == NULL) { \
- ASSERT(!TEXT("Pin not set")); \
- } else if (pin->IsConnected() == FALSE) { \
- return (code); \
- } \
-}
-
-// This checks to see whether the window has a drain. An application can in
-// most environments set the owner/parent of windows so that they appear in
-// a compound document context (for example). In this case, the application
-// would probably like to be told of any keyboard/mouse messages. Therefore
-// we pass these messages on untranslated, returning TRUE if we're successful
-
-BOOL WINAPI PossiblyEatMessage(HWND hwndDrain, UINT uMsg, WPARAM wParam, LPARAM lParam)
-{
- if (hwndDrain != NULL && !InSendMessage())
- {
- switch (uMsg)
- {
- case WM_CHAR:
- case WM_DEADCHAR:
- case WM_KEYDOWN:
- case WM_KEYUP:
- case WM_LBUTTONDBLCLK:
- case WM_LBUTTONDOWN:
- case WM_LBUTTONUP:
- case WM_MBUTTONDBLCLK:
- case WM_MBUTTONDOWN:
- case WM_MBUTTONUP:
- case WM_MOUSEACTIVATE:
- case WM_MOUSEMOVE:
- // If we pass this on we don't get any mouse clicks
- //case WM_NCHITTEST:
- case WM_NCLBUTTONDBLCLK:
- case WM_NCLBUTTONDOWN:
- case WM_NCLBUTTONUP:
- case WM_NCMBUTTONDBLCLK:
- case WM_NCMBUTTONDOWN:
- case WM_NCMBUTTONUP:
- case WM_NCMOUSEMOVE:
- case WM_NCRBUTTONDBLCLK:
- case WM_NCRBUTTONDOWN:
- case WM_NCRBUTTONUP:
- case WM_RBUTTONDBLCLK:
- case WM_RBUTTONDOWN:
- case WM_RBUTTONUP:
- case WM_SYSCHAR:
- case WM_SYSDEADCHAR:
- case WM_SYSKEYDOWN:
- case WM_SYSKEYUP:
-
- DbgLog((LOG_TRACE, 2, TEXT("Forwarding %x to drain")));
- PostMessage(hwndDrain, uMsg, wParam, lParam);
-
- return TRUE;
- }
- }
- return FALSE;
-}
-
-
-// This class implements the IVideoWindow control functions (dual interface)
-// we support a large number of properties and methods designed to allow the
-// client (whether it be an automation controller or a C/C++ application) to
-// set and get a number of window related properties such as it's position.
-// We also support some methods that duplicate the properties but provide a
-// more direct and efficient mechanism as many values may be changed in one
-
-CBaseControlWindow::CBaseControlWindow(
- __inout CBaseFilter *pFilter, // Owning filter
- __in CCritSec *pInterfaceLock, // Locking object
- __in_opt LPCTSTR pName, // Object description
- __inout_opt LPUNKNOWN pUnk, // Normal COM ownership
- __inout HRESULT *phr) : // OLE return code
-
- CBaseVideoWindow(pName,pUnk),
- m_pInterfaceLock(pInterfaceLock),
- m_hwndOwner(NULL),
- m_hwndDrain(NULL),
- m_bAutoShow(TRUE),
- m_pFilter(pFilter),
- m_bCursorHidden(FALSE),
- m_pPin(NULL)
-{
- ASSERT(m_pFilter);
- ASSERT(m_pInterfaceLock);
- ASSERT(phr);
- m_BorderColour = VIDEO_COLOUR;
-}
-
-
-// Set the title caption on the base window, we don't do any field checking
-// as we really don't care what title they intend to have. We can always get
-// it back again later with GetWindowText. The only other complication is to
-// do the necessary string conversions between ANSI and OLE Unicode strings
-
-STDMETHODIMP CBaseControlWindow::put_Caption(__in BSTR strCaption)
-{
- CheckPointer((PVOID)strCaption,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-#ifdef UNICODE
- SetWindowText(m_hwnd, strCaption);
-#else
- CHAR Caption[CAPTION];
-
- WideCharToMultiByte(CP_ACP,0,strCaption,-1,Caption,CAPTION,NULL,NULL);
- SetWindowText(m_hwnd, Caption);
-#endif
- return NOERROR;
-}
-
-
-// Get the current base window title caption, once again we do no real field
-// checking. We allocate a string for the window title to be filled in with
-// which ensures the interface doesn't fiddle around with getting memory. A
-// BSTR is a normal C string with the length at position (-1), we use the
-// WriteBSTR helper function to create the caption to try and avoid OLE32
-
-STDMETHODIMP CBaseControlWindow::get_Caption(__out BSTR *pstrCaption)
-{
- CheckPointer(pstrCaption,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- WCHAR WideCaption[CAPTION];
-
-#ifdef UNICODE
- GetWindowText(m_hwnd,WideCaption,CAPTION);
-#else
- // Convert the ASCII caption to a UNICODE string
-
- TCHAR Caption[CAPTION];
- GetWindowText(m_hwnd,Caption,CAPTION);
- MultiByteToWideChar(CP_ACP,0,Caption,-1,WideCaption,CAPTION);
-#endif
- return WriteBSTR(pstrCaption,WideCaption);
-}
-
-
-// Set the window style using GWL_EXSTYLE
-
-STDMETHODIMP CBaseControlWindow::put_WindowStyleEx(long WindowStyleEx)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Should we be taking off WS_EX_TOPMOST
-
- if (GetWindowLong(m_hwnd,GWL_EXSTYLE) & WS_EX_TOPMOST) {
- if ((WindowStyleEx & WS_EX_TOPMOST) == 0) {
- SendMessage(m_hwnd,m_ShowStageTop,(WPARAM) FALSE,(LPARAM) 0);
- }
- }
-
- // Likewise should we be adding WS_EX_TOPMOST
-
- if (WindowStyleEx & WS_EX_TOPMOST) {
- SendMessage(m_hwnd,m_ShowStageTop,(WPARAM) TRUE,(LPARAM) 0);
- WindowStyleEx &= (~WS_EX_TOPMOST);
- if (WindowStyleEx == 0) return NOERROR;
- }
- return DoSetWindowStyle(WindowStyleEx,GWL_EXSTYLE);
-}
-
-
-// Gets the current GWL_EXSTYLE base window style
-
-STDMETHODIMP CBaseControlWindow::get_WindowStyleEx(__out long *pWindowStyleEx)
-{
- CheckPointer(pWindowStyleEx,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- return DoGetWindowStyle(pWindowStyleEx,GWL_EXSTYLE);
-}
-
-
-// Set the window style using GWL_STYLE
-
-STDMETHODIMP CBaseControlWindow::put_WindowStyle(long WindowStyle)
-{
- // These styles cannot be changed dynamically
-
- if ((WindowStyle & WS_DISABLED) ||
- (WindowStyle & WS_ICONIC) ||
- (WindowStyle & WS_MAXIMIZE) ||
- (WindowStyle & WS_MINIMIZE) ||
- (WindowStyle & WS_HSCROLL) ||
- (WindowStyle & WS_VSCROLL)) {
-
- return E_INVALIDARG;
- }
-
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- return DoSetWindowStyle(WindowStyle,GWL_STYLE);
-}
-
-
-// Get the current GWL_STYLE base window style
-
-STDMETHODIMP CBaseControlWindow::get_WindowStyle(__out long *pWindowStyle)
-{
- CheckPointer(pWindowStyle,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- return DoGetWindowStyle(pWindowStyle,GWL_STYLE);
-}
-
-
-// Change the base window style or the extended styles depending on whether
-// WindowLong is GWL_STYLE or GWL_EXSTYLE. We must call SetWindowPos to have
-// the window displayed in it's new style after the change which is a little
-// tricky if the window is not currently visible as we realise it offscreen.
-// In most cases the client will call get_WindowStyle before they call this
-// and then AND and OR in extra bit settings according to the requirements
-
-HRESULT CBaseControlWindow::DoSetWindowStyle(long Style,long WindowLong)
-{
- RECT WindowRect;
-
- // Get the window's visibility before setting the style
- BOOL bVisible = IsWindowVisible(m_hwnd);
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- // Set the new style flags for the window
- SetWindowLong(m_hwnd,WindowLong,Style);
- UINT WindowFlags = SWP_SHOWWINDOW | SWP_FRAMECHANGED | SWP_NOACTIVATE;
- WindowFlags |= SWP_NOZORDER | SWP_NOSIZE | SWP_NOMOVE;
-
- // Show the window again in the current position
-
- if (bVisible == TRUE) {
-
- SetWindowPos(m_hwnd, // Base window handle
- HWND_TOP, // Just a place holder
- 0,0,0,0, // Leave size and position
- WindowFlags); // Just draw it again
-
- return NOERROR;
- }
-
- // Move the window offscreen so the user doesn't see the changes
-
- MoveWindow((HWND) m_hwnd, // Base window handle
- GetSystemMetrics(SM_CXSCREEN), // Current desktop width
- GetSystemMetrics(SM_CYSCREEN), // Likewise it's height
- WIDTH(&WindowRect), // Use the same width
- HEIGHT(&WindowRect), // Keep height same to
- TRUE); // May as well repaint
-
- // Now show the previously hidden window
-
- SetWindowPos(m_hwnd, // Base window handle
- HWND_TOP, // Just a place holder
- 0,0,0,0, // Leave size and position
- WindowFlags); // Just draw it again
-
- ShowWindow(m_hwnd,SW_HIDE);
-
- if (GetParent(m_hwnd)) {
-
- MapWindowPoints(HWND_DESKTOP, GetParent(m_hwnd), (LPPOINT)&WindowRect, 2);
- }
-
- MoveWindow((HWND) m_hwnd, // Base window handle
- WindowRect.left, // Existing x coordinate
- WindowRect.top, // Existing y coordinate
- WIDTH(&WindowRect), // Use the same width
- HEIGHT(&WindowRect), // Keep height same to
- TRUE); // May as well repaint
-
- return NOERROR;
-}
-
-
-// Get the current base window style (either GWL_STYLE or GWL_EXSTYLE)
-
-HRESULT CBaseControlWindow::DoGetWindowStyle(__out long *pStyle,long WindowLong)
-{
- *pStyle = GetWindowLong(m_hwnd,WindowLong);
- return NOERROR;
-}
-
-
-// Change the visibility of the base window, this takes the same parameters
-// as the ShowWindow Win32 API does, so the client can have the window hidden
-// or shown, minimised to an icon, or maximised to play in full screen mode
-// We pass the request on to the base window to actually make the change
-
-STDMETHODIMP CBaseControlWindow::put_WindowState(long WindowState)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- DoShowWindow(WindowState);
- return NOERROR;
-}
-
-
-// Get the current window state, this function returns a subset of the SW bit
-// settings available in ShowWindow, if the window is visible then SW_SHOW is
-// set, if it is hidden then the SW_HIDDEN is set, if it is either minimised
-// or maximised then the SW_MINIMIZE or SW_MAXIMIZE is set respectively. The
-// other SW bit settings are really set commands not readable output values
-
-STDMETHODIMP CBaseControlWindow::get_WindowState(__out long *pWindowState)
-{
- CheckPointer(pWindowState,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- ASSERT(pWindowState);
- *pWindowState = FALSE;
-
- // Is the window visible, a window is termed visible if it is somewhere on
- // the current desktop even if it is completely obscured by other windows
- // so the flag is a style for each window set with the WS_VISIBLE bit
-
- if (IsWindowVisible(m_hwnd) == TRUE) {
-
- // Is the base window iconic
- if (IsIconic(m_hwnd) == TRUE) {
- *pWindowState |= SW_MINIMIZE;
- }
-
- // Has the window been maximised
- else if (IsZoomed(m_hwnd) == TRUE) {
- *pWindowState |= SW_MAXIMIZE;
- }
-
- // Window is normal
- else {
- *pWindowState |= SW_SHOW;
- }
-
- } else {
- *pWindowState |= SW_HIDE;
- }
- return NOERROR;
-}
-
-
-// This makes sure that any palette we realise in the base window (through a
-// media type or through the overlay interface) is done in the background and
-// is therefore mapped to existing device entries rather than taking it over
-// as it will do when we this window gets the keyboard focus. An application
-// uses this to make sure it doesn't have it's palette removed by the window
-
-STDMETHODIMP CBaseControlWindow::put_BackgroundPalette(long BackgroundPalette)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cWindowLock(&m_WindowLock);
-
- // Check this is a valid automation boolean type
-
- if (BackgroundPalette != OATRUE) {
- if (BackgroundPalette != OAFALSE) {
- return E_INVALIDARG;
- }
- }
-
- // Make sure the window realises any palette it has again
-
- m_bBackground = (BackgroundPalette == OATRUE ? TRUE : FALSE);
- PostMessage(m_hwnd,m_RealizePalette,0,0);
- PaintWindow(FALSE);
-
- return NOERROR;
-}
-
-
-// This returns the current background realisation setting
-
-STDMETHODIMP
-CBaseControlWindow::get_BackgroundPalette(__out long *pBackgroundPalette)
-{
- CheckPointer(pBackgroundPalette,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cWindowLock(&m_WindowLock);
-
- // Get the current background palette setting
-
- *pBackgroundPalette = (m_bBackground == TRUE ? OATRUE : OAFALSE);
- return NOERROR;
-}
-
-
-// Change the visibility of the base window
-
-STDMETHODIMP CBaseControlWindow::put_Visible(long Visible)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Check this is a valid automation boolean type
-
- if (Visible != OATRUE) {
- if (Visible != OAFALSE) {
- return E_INVALIDARG;
- }
- }
-
- // Convert the boolean visibility into SW_SHOW and SW_HIDE
-
- INT Mode = (Visible == OATRUE ? SW_SHOWNORMAL : SW_HIDE);
- DoShowWindow(Mode);
- return NOERROR;
-}
-
-
-// Return OATRUE if the window is currently visible otherwise OAFALSE
-
-STDMETHODIMP CBaseControlWindow::get_Visible(__out long *pVisible)
-{
- CheckPointer(pVisible,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // See if the base window has a WS_VISIBLE style - this will return TRUE
- // even if the window is completely obscured by other desktop windows, we
- // return FALSE if the window is not showing because of earlier calls
-
- BOOL Mode = IsWindowVisible(m_hwnd);
- *pVisible = (Mode == TRUE ? OATRUE : OAFALSE);
- return NOERROR;
-}
-
-
-// Change the left position of the base window. This keeps the window width
-// and height properties the same so it effectively shunts the window left or
-// right accordingly - there is the Width property to change that dimension
-
-STDMETHODIMP CBaseControlWindow::put_Left(long Left)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bSuccess;
- RECT WindowRect;
-
- // Get the current window position in a RECT
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- if (GetParent(m_hwnd)) {
-
- MapWindowPoints(HWND_DESKTOP, GetParent(m_hwnd), (LPPOINT)&WindowRect, 2);
- }
-
- // Adjust the coordinates ready for SetWindowPos, the window rectangle we
- // get back from GetWindowRect is in left,top,right and bottom while the
- // coordinates SetWindowPos wants are left,top,width and height values
-
- WindowRect.bottom = WindowRect.bottom - WindowRect.top;
- WindowRect.right = WindowRect.right - WindowRect.left;
- UINT WindowFlags = SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE;
-
- bSuccess = SetWindowPos(m_hwnd, // Window handle
- HWND_TOP, // Put it at the top
- Left, // New left position
- WindowRect.top, // Leave top alone
- WindowRect.right, // The WIDTH (not right)
- WindowRect.bottom, // The HEIGHT (not bottom)
- WindowFlags); // Show window options
-
- if (bSuccess == FALSE) {
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// Return the current base window left position
-
-STDMETHODIMP CBaseControlWindow::get_Left(__out long *pLeft)
-{
- CheckPointer(pLeft,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT WindowRect;
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
- *pLeft = WindowRect.left;
- return NOERROR;
-}
-
-
-// Change the current width of the base window. This property complements the
-// left position property so we must keep the left edge constant and expand or
-// contract to the right, the alternative would be to change the left edge so
-// keeping the right edge constant but this is maybe a little more intuitive
-
-STDMETHODIMP CBaseControlWindow::put_Width(long Width)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bSuccess;
- RECT WindowRect;
-
- // Adjust the coordinates ready for SetWindowPos, the window rectangle we
- // get back from GetWindowRect is in left,top,right and bottom while the
- // coordinates SetWindowPos wants are left,top,width and height values
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- if (GetParent(m_hwnd)) {
-
- MapWindowPoints(HWND_DESKTOP, GetParent(m_hwnd), (LPPOINT)&WindowRect, 2);
- }
-
- WindowRect.bottom = WindowRect.bottom - WindowRect.top;
- UINT WindowFlags = SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE;
-
- // This seems to have a bug in that calling SetWindowPos on a window with
- // just the width changing causes it to ignore the width that you pass in
- // and sets it to a mimimum value of 110 pixels wide (Windows NT 3.51)
-
- bSuccess = SetWindowPos(m_hwnd, // Window handle
- HWND_TOP, // Put it at the top
- WindowRect.left, // Leave left alone
- WindowRect.top, // Leave top alone
- Width, // New WIDTH dimension
- WindowRect.bottom, // The HEIGHT (not bottom)
- WindowFlags); // Show window options
-
- if (bSuccess == FALSE) {
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// Return the current base window width
-
-STDMETHODIMP CBaseControlWindow::get_Width(__out long *pWidth)
-{
- CheckPointer(pWidth,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT WindowRect;
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
- *pWidth = WindowRect.right - WindowRect.left;
- return NOERROR;
-}
-
-
-// This allows the client program to change the top position for the window in
-// the same way that changing the left position does not affect the width of
-// the image so changing the top position does not affect the window height
-
-STDMETHODIMP CBaseControlWindow::put_Top(long Top)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bSuccess;
- RECT WindowRect;
-
- // Get the current window position in a RECT
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- if (GetParent(m_hwnd)) {
-
- MapWindowPoints(HWND_DESKTOP, GetParent(m_hwnd), (LPPOINT)&WindowRect, 2);
- }
-
- // Adjust the coordinates ready for SetWindowPos, the window rectangle we
- // get back from GetWindowRect is in left,top,right and bottom while the
- // coordinates SetWindowPos wants are left,top,width and height values
-
- WindowRect.bottom = WindowRect.bottom - WindowRect.top;
- WindowRect.right = WindowRect.right - WindowRect.left;
- UINT WindowFlags = SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE;
-
- bSuccess = SetWindowPos(m_hwnd, // Window handle
- HWND_TOP, // Put it at the top
- WindowRect.left, // Leave left alone
- Top, // New top position
- WindowRect.right, // The WIDTH (not right)
- WindowRect.bottom, // The HEIGHT (not bottom)
- WindowFlags); // Show window flags
-
- if (bSuccess == FALSE) {
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// Return the current base window top position
-
-STDMETHODIMP CBaseControlWindow::get_Top(long *pTop)
-{
- CheckPointer(pTop,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT WindowRect;
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
- *pTop = WindowRect.top;
- return NOERROR;
-}
-
-
-// Change the height of the window, this complements the top property so when
-// we change this we must keep the top position for the base window, as said
-// before we could keep the bottom and grow upwards although this is perhaps
-// a little more intuitive since we already have a top position property
-
-STDMETHODIMP CBaseControlWindow::put_Height(long Height)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bSuccess;
- RECT WindowRect;
-
- // Adjust the coordinates ready for SetWindowPos, the window rectangle we
- // get back from GetWindowRect is in left,top,right and bottom while the
- // coordinates SetWindowPos wants are left,top,width and height values
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- if (GetParent(m_hwnd)) {
-
- MapWindowPoints(HWND_DESKTOP, GetParent(m_hwnd), (LPPOINT)&WindowRect, 2);
- }
-
- WindowRect.right = WindowRect.right - WindowRect.left;
- UINT WindowFlags = SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE;
-
- bSuccess = SetWindowPos(m_hwnd, // Window handle
- HWND_TOP, // Put it at the top
- WindowRect.left, // Leave left alone
- WindowRect.top, // Leave top alone
- WindowRect.right, // The WIDTH (not right)
- Height, // New height dimension
- WindowFlags); // Show window flags
-
- if (bSuccess == FALSE) {
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// Return the current base window height
-
-STDMETHODIMP CBaseControlWindow::get_Height(__out long *pHeight)
-{
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT WindowRect;
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
- *pHeight = WindowRect.bottom - WindowRect.top;
- return NOERROR;
-}
-
-
-// This can be called to change the owning window. Setting the owner is done
-// through this function, however to make the window a true child window the
-// style must also be set to WS_CHILD. After resetting the owner to NULL an
-// application should also set the style to WS_OVERLAPPED | WS_CLIPCHILDREN.
-
-// We cannot lock the object here because the SetParent causes an interthread
-// SendMessage to the owner window. If they are in GetState we will sit here
-// incomplete with the critical section locked therefore blocking out source
-// filter threads from accessing us. Because the source thread can't enter us
-// it can't get buffers or call EndOfStream so the GetState will not complete
-
-STDMETHODIMP CBaseControlWindow::put_Owner(OAHWND Owner)
-{
- // Check we are connected otherwise reject the call
-
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- m_hwndOwner = (HWND) Owner;
- HWND hwndParent = m_hwndOwner;
-
- // Add or remove WS_CHILD as appropriate
-
- LONG Style = GetWindowLong(m_hwnd,GWL_STYLE);
- if (Owner == NULL) {
- Style &= (~WS_CHILD);
- } else {
- Style |= (WS_CHILD);
- }
- SetWindowLong(m_hwnd,GWL_STYLE,Style);
-
- // Don't call this with the filter locked
-
- SetParent(m_hwnd,hwndParent);
-
- PaintWindow(TRUE);
- NOTE1("Changed parent %lx",hwndParent);
-
- return NOERROR;
-}
-
-
-// This complements the put_Owner to get the current owning window property
-// we always return NOERROR although the returned window handle may be NULL
-// to indicate no owning window (the desktop window doesn't qualify as one)
-// If an application sets the owner we call SetParent, however that returns
-// NULL until the WS_CHILD bit is set on, so we store the owner internally
-
-STDMETHODIMP CBaseControlWindow::get_Owner(__out OAHWND *Owner)
-{
- CheckPointer(Owner,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- *Owner = (OAHWND) m_hwndOwner;
- return NOERROR;
-}
-
-
-// And renderer supporting IVideoWindow may have an HWND set who will get any
-// keyboard and mouse messages we receive posted on to them. This is separate
-// from setting an owning window. By separating the two, applications may get
-// messages sent on even when they have set no owner (perhaps it's maximised)
-
-STDMETHODIMP CBaseControlWindow::put_MessageDrain(OAHWND Drain)
-{
- // Check we are connected otherwise reject the call
-
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- m_hwndDrain = (HWND) Drain;
- return NOERROR;
-}
-
-
-// Return the current message drain
-
-STDMETHODIMP CBaseControlWindow::get_MessageDrain(__out OAHWND *Drain)
-{
- CheckPointer(Drain,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- *Drain = (OAHWND) m_hwndDrain;
- return NOERROR;
-}
-
-
-// This is called by the filter graph to inform us of a message we should know
-// is being sent to our owning window. We have this because as a child window
-// we do not get certain messages that are only sent to top level windows. We
-// must see the palette changed/changing/query messages so that we know if we
-// have the foreground palette or not. We pass the message on to our window
-// using SendMessage - this will cause an interthread send message to occur
-
-STDMETHODIMP
-CBaseControlWindow::NotifyOwnerMessage(OAHWND hwnd, // Window handle
- long uMsg, // Message ID
- LONG_PTR wParam, // Parameters
- LONG_PTR lParam) // for message
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Only interested in these Windows messages
-
- switch (uMsg) {
-
- case WM_SYSCOLORCHANGE:
- case WM_PALETTECHANGED:
- case WM_PALETTEISCHANGING:
- case WM_QUERYNEWPALETTE:
- case WM_DEVMODECHANGE:
- case WM_DISPLAYCHANGE:
- case WM_ACTIVATEAPP:
-
- // If we do not have an owner then ignore
-
- if (m_hwndOwner == NULL) {
- return NOERROR;
- }
- SendMessage(m_hwnd,uMsg,(WPARAM)wParam,(LPARAM)lParam);
- break;
-
- // do NOT fwd WM_MOVE. the parameters are the location of the parent
- // window, NOT what the renderer should be looking at. But we need
- // to make sure the overlay is moved with the parent window, so we
- // do this.
- case WM_MOVE:
- PostMessage(m_hwnd,WM_PAINT,0,0);
- break;
- }
- return NOERROR;
-}
-
-
-// Allow an application to have us set the base window in the foreground. We
-// have this because it is difficult for one thread to do do this to a window
-// owned by another thread. We ask the base window class to do the real work
-
-STDMETHODIMP CBaseControlWindow::SetWindowForeground(long Focus)
-{
- // Check this is a valid automation boolean type
-
- if (Focus != OATRUE) {
- if (Focus != OAFALSE) {
- return E_INVALIDARG;
- }
- }
-
- // We shouldn't lock as this sends a message
-
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bFocus = (Focus == OATRUE ? TRUE : FALSE);
- DoSetWindowForeground(bFocus);
-
- return NOERROR;
-}
-
-
-// This allows a client to set the complete window size and position in one
-// atomic operation. The same affect can be had by changing each dimension
-// in turn through their individual properties although some flashing will
-// occur as each of them gets updated (they are better set at design time)
-
-STDMETHODIMP
-CBaseControlWindow::SetWindowPosition(long Left,long Top,long Width,long Height)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- BOOL bSuccess;
-
- // Set the new size and position
- UINT WindowFlags = SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE;
-
- ASSERT(IsWindow(m_hwnd));
- bSuccess = SetWindowPos(m_hwnd, // Window handle
- HWND_TOP, // Put it at the top
- Left, // Left position
- Top, // Top position
- Width, // Window width
- Height, // Window height
- WindowFlags); // Show window flags
- ASSERT(bSuccess);
-#ifdef DEBUG
- DbgLog((LOG_TRACE, 1, TEXT("SWP failed error %d"), GetLastError()));
-#endif
- if (bSuccess == FALSE) {
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// This complements the SetWindowPosition to return the current window place
-// in device coordinates. As before the same information can be retrived by
-// calling the property get functions individually but this is atomic and is
-// therefore more suitable to a live environment rather than design time
-
-STDMETHODIMP
-CBaseControlWindow::GetWindowPosition(__out long *pLeft,__out long *pTop,__out long *pWidth,__out long *pHeight)
-{
- // Should check the pointers are not NULL
-
- CheckPointer(pLeft,E_POINTER);
- CheckPointer(pTop,E_POINTER);
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT WindowRect;
-
- // Get the current window coordinates
-
- EXECUTE_ASSERT(GetWindowRect(m_hwnd,&WindowRect));
-
- // Convert the RECT into left,top,width and height values
-
- *pLeft = WindowRect.left;
- *pTop = WindowRect.top;
- *pWidth = WindowRect.right - WindowRect.left;
- *pHeight = WindowRect.bottom - WindowRect.top;
-
- return NOERROR;
-}
-
-
-// When a window is maximised or iconic calling GetWindowPosition will return
-// the current window position (likewise for the properties). However if the
-// restored size (ie the size we'll return to when normally shown) is needed
-// then this should be used. When in a normal position (neither iconic nor
-// maximised) then this returns the same coordinates as GetWindowPosition
-
-STDMETHODIMP
-CBaseControlWindow::GetRestorePosition(__out long *pLeft,__out long *pTop,__out long *pWidth,__out long *pHeight)
-{
- // Should check the pointers are not NULL
-
- CheckPointer(pLeft,E_POINTER);
- CheckPointer(pTop,E_POINTER);
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Use GetWindowPlacement to find the restore position
-
- WINDOWPLACEMENT Place;
- Place.length = sizeof(WINDOWPLACEMENT);
- EXECUTE_ASSERT(GetWindowPlacement(m_hwnd,&Place));
-
- RECT WorkArea;
-
- // We must take into account any task bar present
-
- if (SystemParametersInfo(SPI_GETWORKAREA,0,&WorkArea,FALSE) == TRUE) {
- if (GetParent(m_hwnd) == NULL) {
- Place.rcNormalPosition.top += WorkArea.top;
- Place.rcNormalPosition.bottom += WorkArea.top;
- Place.rcNormalPosition.left += WorkArea.left;
- Place.rcNormalPosition.right += WorkArea.left;
- }
- }
-
- // Convert the RECT into left,top,width and height values
-
- *pLeft = Place.rcNormalPosition.left;
- *pTop = Place.rcNormalPosition.top;
- *pWidth = Place.rcNormalPosition.right - Place.rcNormalPosition.left;
- *pHeight = Place.rcNormalPosition.bottom - Place.rcNormalPosition.top;
-
- return NOERROR;
-}
-
-
-// Return the current border colour, if we are playing something to a subset
-// of the base window display there is an outside area exposed. The default
-// action is to paint this colour in the Windows background colour (defined
-// as value COLOR_WINDOW) We reset to this default when we're disconnected
-
-STDMETHODIMP CBaseControlWindow::get_BorderColor(__out long *Color)
-{
- CheckPointer(Color,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- *Color = (long) m_BorderColour;
- return NOERROR;
-}
-
-
-// This can be called to set the current border colour
-
-STDMETHODIMP CBaseControlWindow::put_BorderColor(long Color)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Have the window repainted with the new border colour
-
- m_BorderColour = (COLORREF) Color;
- PaintWindow(TRUE);
- return NOERROR;
-}
-
-
-// Delegate fullscreen handling to plug in distributor
-
-STDMETHODIMP CBaseControlWindow::get_FullScreenMode(__out long *FullScreenMode)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CheckPointer(FullScreenMode,E_POINTER);
- return E_NOTIMPL;
-}
-
-
-// Delegate fullscreen handling to plug in distributor
-
-STDMETHODIMP CBaseControlWindow::put_FullScreenMode(long FullScreenMode)
-{
- return E_NOTIMPL;
-}
-
-
-// This sets the auto show property, this property causes the base window to
-// be displayed whenever we change state. This allows an application to have
-// to do nothing to have the window appear but still allow them to change the
-// default behaviour if for example they want to keep it hidden for longer
-
-STDMETHODIMP CBaseControlWindow::put_AutoShow(long AutoShow)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Check this is a valid automation boolean type
-
- if (AutoShow != OATRUE) {
- if (AutoShow != OAFALSE) {
- return E_INVALIDARG;
- }
- }
-
- m_bAutoShow = (AutoShow == OATRUE ? TRUE : FALSE);
- return NOERROR;
-}
-
-
-// This can be called to get the current auto show flag. The flag is updated
-// when we connect and disconnect and through this interface all of which are
-// controlled and serialised by means of the main renderer critical section
-
-STDMETHODIMP CBaseControlWindow::get_AutoShow(__out long *AutoShow)
-{
- CheckPointer(AutoShow,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- *AutoShow = (m_bAutoShow == TRUE ? OATRUE : OAFALSE);
- return NOERROR;
-}
-
-
-// Return the minimum ideal image size for the current video. This may differ
-// to the actual video dimensions because we may be using DirectDraw hardware
-// that has specific stretching requirements. For example the Cirrus Logic
-// cards have a minimum stretch factor depending on the overlay surface size
-
-STDMETHODIMP
-CBaseControlWindow::GetMinIdealImageSize(__out long *pWidth,__out long *pHeight)
-{
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- FILTER_STATE State;
-
- // Must not be stopped for this to work correctly
-
- m_pFilter->GetState(0,&State);
- if (State == State_Stopped) {
- return VFW_E_WRONG_STATE;
- }
-
- RECT DefaultRect = GetDefaultRect();
- *pWidth = WIDTH(&DefaultRect);
- *pHeight = HEIGHT(&DefaultRect);
- return NOERROR;
-}
-
-
-// Return the maximum ideal image size for the current video. This may differ
-// to the actual video dimensions because we may be using DirectDraw hardware
-// that has specific stretching requirements. For example the Cirrus Logic
-// cards have a maximum stretch factor depending on the overlay surface size
-
-STDMETHODIMP
-CBaseControlWindow::GetMaxIdealImageSize(__out long *pWidth,__out long *pHeight)
-{
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- FILTER_STATE State;
-
- // Must not be stopped for this to work correctly
-
- m_pFilter->GetState(0,&State);
- if (State == State_Stopped) {
- return VFW_E_WRONG_STATE;
- }
-
- RECT DefaultRect = GetDefaultRect();
- *pWidth = WIDTH(&DefaultRect);
- *pHeight = HEIGHT(&DefaultRect);
- return NOERROR;
-}
-
-
-// Allow an application to hide the cursor on our window
-
-STDMETHODIMP
-CBaseControlWindow::HideCursor(long HideCursor)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
-
- // Check this is a valid automation boolean type
-
- if (HideCursor != OATRUE) {
- if (HideCursor != OAFALSE) {
- return E_INVALIDARG;
- }
- }
-
- m_bCursorHidden = (HideCursor == OATRUE ? TRUE : FALSE);
- return NOERROR;
-}
-
-
-// Returns whether we have the cursor hidden or not
-
-STDMETHODIMP CBaseControlWindow::IsCursorHidden(__out long *CursorHidden)
-{
- CheckPointer(CursorHidden,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- *CursorHidden = (m_bCursorHidden == TRUE ? OATRUE : OAFALSE);
- return NOERROR;
-}
-
-
-// This class implements the IBasicVideo control functions (dual interface)
-// we support a large number of properties and methods designed to allow the
-// client (whether it be an automation controller or a C/C++ application) to
-// set and get a number of video related properties such as the native video
-// size. We support some methods that duplicate the properties but provide a
-// more direct and efficient mechanism as many values may be changed in one
-
-CBaseControlVideo::CBaseControlVideo(
- __inout CBaseFilter *pFilter, // Owning filter
- __in CCritSec *pInterfaceLock, // Locking object
- __in_opt LPCTSTR pName, // Object description
- __inout_opt LPUNKNOWN pUnk, // Normal COM ownership
- __inout HRESULT *phr) : // OLE return code
-
- CBaseBasicVideo(pName,pUnk),
- m_pFilter(pFilter),
- m_pInterfaceLock(pInterfaceLock),
- m_pPin(NULL)
-{
- ASSERT(m_pFilter);
- ASSERT(m_pInterfaceLock);
- ASSERT(phr);
-}
-
-// Return an approximate average time per frame
-
-STDMETHODIMP CBaseControlVideo::get_AvgTimePerFrame(__out REFTIME *pAvgTimePerFrame)
-{
- CheckPointer(pAvgTimePerFrame,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- COARefTime AvgTime(pVideoInfo->AvgTimePerFrame);
- *pAvgTimePerFrame = (REFTIME) AvgTime;
-
- return NOERROR;
-}
-
-
-// Return an approximate bit rate for the video
-
-STDMETHODIMP CBaseControlVideo::get_BitRate(__out long *pBitRate)
-{
- CheckPointer(pBitRate,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- *pBitRate = pVideoInfo->dwBitRate;
- return NOERROR;
-}
-
-
-// Return an approximate bit error rate
-
-STDMETHODIMP CBaseControlVideo::get_BitErrorRate(__out long *pBitErrorRate)
-{
- CheckPointer(pBitErrorRate,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- *pBitErrorRate = pVideoInfo->dwBitErrorRate;
- return NOERROR;
-}
-
-
-// This returns the current video width
-
-STDMETHODIMP CBaseControlVideo::get_VideoWidth(__out long *pVideoWidth)
-{
- CheckPointer(pVideoWidth,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- *pVideoWidth = pVideoInfo->bmiHeader.biWidth;
- return NOERROR;
-}
-
-
-// This returns the current video height
-
-STDMETHODIMP CBaseControlVideo::get_VideoHeight(__out long *pVideoHeight)
-{
- CheckPointer(pVideoHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- *pVideoHeight = pVideoInfo->bmiHeader.biHeight;
- return NOERROR;
-}
-
-
-// This returns the current palette the video is using as an array allocated
-// by the user. To remain consistent we use PALETTEENTRY fields to return the
-// colours in rather than RGBQUADs that multimedia decided to use. The memory
-// is allocated by the user so we simple copy each in turn. We check that the
-// number of entries requested and the start position offset are both valid
-// If the number of entries evaluates to zero then we return an S_FALSE code
-
-STDMETHODIMP CBaseControlVideo::GetVideoPaletteEntries(long StartIndex,
- long Entries,
- __out long *pRetrieved,
- __out_ecount_part(Entries, *pRetrieved) long *pPalette)
-{
- CheckPointer(pRetrieved,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- CMediaType MediaType;
-
- // Get the video format from the derived class
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- BITMAPINFOHEADER *pHeader = HEADER(pVideoInfo);
-
- // Is the current format palettised
-
- if (PALETTISED(pVideoInfo) == FALSE) {
- *pRetrieved = 0;
- return VFW_E_NO_PALETTE_AVAILABLE;
- }
-
- // Do they just want to know how many are available
-
- if (pPalette == NULL) {
- *pRetrieved = pHeader->biClrUsed;
- return NOERROR;
- }
-
- // Make sure the start position is a valid offset
-
- if (StartIndex >= (LONG) pHeader->biClrUsed || StartIndex < 0) {
- *pRetrieved = 0;
- return E_INVALIDARG;
- }
-
- // Correct the number we can retrieve
-
- LONG Available = (LONG) pHeader->biClrUsed - StartIndex;
- *pRetrieved = max(0,min(Available,Entries));
- if (*pRetrieved == 0) {
- return S_FALSE;
- }
-
- // Copy the palette entries to the output buffer
-
- PALETTEENTRY *pEntries = (PALETTEENTRY *) pPalette;
- RGBQUAD *pColours = COLORS(pVideoInfo) + StartIndex;
-
- for (LONG Count = 0;Count < *pRetrieved;Count++) {
- pEntries[Count].peRed = pColours[Count].rgbRed;
- pEntries[Count].peGreen = pColours[Count].rgbGreen;
- pEntries[Count].peBlue = pColours[Count].rgbBlue;
- pEntries[Count].peFlags = 0;
- }
- return NOERROR;
-}
-
-
-// This returns the current video dimensions as a method rather than a number
-// of individual property get calls. For the same reasons as said before we
-// cannot access the renderer media type directly as the window object thread
-// may be updating it since dynamic format changes may change these values
-
-STDMETHODIMP CBaseControlVideo::GetVideoSize(__out long *pWidth,__out long *pHeight)
-{
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
-
- // Get the video format from the derived class
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- *pWidth = pVideoInfo->bmiHeader.biWidth;
- *pHeight = pVideoInfo->bmiHeader.biHeight;
- return NOERROR;
-}
-
-
-// Set the source video rectangle as left,top,right and bottom coordinates
-// rather than left,top,width and height as per OLE automation interfaces
-// Then pass the rectangle on to the window object to set the source
-
-STDMETHODIMP
-CBaseControlVideo::SetSourcePosition(long Left,long Top,long Width,long Height)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
- SourceRect.left = Left;
- SourceRect.top = Top;
- SourceRect.right = Left + Width;
- SourceRect.bottom = Top + Height;
-
- // Check the source rectangle is valid
-
- HRESULT hr = CheckSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the source rectangle
-
- hr = SetSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the source rectangle in left,top,width and height rather than the
-// left,top,right and bottom values that RECT uses (and which the window
-// object returns through GetSourceRect) which requires a little work
-
-STDMETHODIMP
-CBaseControlVideo::GetSourcePosition(__out long *pLeft,__out long *pTop,__out long *pWidth,__out long *pHeight)
-{
- // Should check the pointers are non NULL
-
- CheckPointer(pLeft,E_POINTER);
- CheckPointer(pTop,E_POINTER);
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT SourceRect;
-
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- GetSourceRect(&SourceRect);
-
- *pLeft = SourceRect.left;
- *pTop = SourceRect.top;
- *pWidth = WIDTH(&SourceRect);
- *pHeight = HEIGHT(&SourceRect);
-
- return NOERROR;
-}
-
-
-// Set the video destination as left,top,right and bottom coordinates rather
-// than the left,top,width and height uses as per OLE automation interfaces
-// Then pass the rectangle on to the window object to set the destination
-
-STDMETHODIMP
-CBaseControlVideo::SetDestinationPosition(long Left,long Top,long Width,long Height)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
-
- DestinationRect.left = Left;
- DestinationRect.top = Top;
- DestinationRect.right = Left + Width;
- DestinationRect.bottom = Top + Height;
-
- // Check the target rectangle is valid
-
- HRESULT hr = CheckTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the new target rectangle
-
- hr = SetTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the destination rectangle in left,top,width and height rather than
-// the left,top,right and bottom values that RECT uses (and which the window
-// object returns through GetDestinationRect) which requires a little work
-
-STDMETHODIMP
-CBaseControlVideo::GetDestinationPosition(__out long *pLeft,__out long *pTop,__out long *pWidth,__out long *pHeight)
-{
- // Should check the pointers are not NULL
-
- CheckPointer(pLeft,E_POINTER);
- CheckPointer(pTop,E_POINTER);
- CheckPointer(pWidth,E_POINTER);
- CheckPointer(pHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- RECT DestinationRect;
-
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- GetTargetRect(&DestinationRect);
-
- *pLeft = DestinationRect.left;
- *pTop = DestinationRect.top;
- *pWidth = WIDTH(&DestinationRect);
- *pHeight = HEIGHT(&DestinationRect);
-
- return NOERROR;
-}
-
-
-// Set the source left position, the source rectangle we get back from the
-// window object is a true rectangle in left,top,right and bottom positions
-// so all we have to do is to update the left position and pass it back. We
-// must keep the current width constant when we're updating this property
-
-STDMETHODIMP CBaseControlVideo::put_SourceLeft(long SourceLeft)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
- GetSourceRect(&SourceRect);
- SourceRect.right = SourceLeft + WIDTH(&SourceRect);
- SourceRect.left = SourceLeft;
-
- // Check the source rectangle is valid
-
- HRESULT hr = CheckSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the source rectangle
-
- hr = SetSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the current left source video position
-
-STDMETHODIMP CBaseControlVideo::get_SourceLeft(__out long *pSourceLeft)
-{
- CheckPointer(pSourceLeft,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
-
- GetSourceRect(&SourceRect);
- *pSourceLeft = SourceRect.left;
- return NOERROR;
-}
-
-
-// Set the source width, we get the current source rectangle and then update
-// the right position to be the left position (thereby keeping it constant)
-// plus the new source width we are passed in (it expands to the right)
-
-STDMETHODIMP CBaseControlVideo::put_SourceWidth(long SourceWidth)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
- GetSourceRect(&SourceRect);
- SourceRect.right = SourceRect.left + SourceWidth;
-
- // Check the source rectangle is valid
-
- HRESULT hr = CheckSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the source rectangle
-
- hr = SetSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the current source width
-
-STDMETHODIMP CBaseControlVideo::get_SourceWidth(__out long *pSourceWidth)
-{
- CheckPointer(pSourceWidth,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
-
- GetSourceRect(&SourceRect);
- *pSourceWidth = WIDTH(&SourceRect);
- return NOERROR;
-}
-
-
-// Set the source top position - changing this property does not affect the
-// current source height. So changing this shunts the source rectangle up and
-// down appropriately. Changing the height complements this functionality by
-// keeping the top position constant and simply changing the source height
-
-STDMETHODIMP CBaseControlVideo::put_SourceTop(long SourceTop)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
- GetSourceRect(&SourceRect);
- SourceRect.bottom = SourceTop + HEIGHT(&SourceRect);
- SourceRect.top = SourceTop;
-
- // Check the source rectangle is valid
-
- HRESULT hr = CheckSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the source rectangle
-
- hr = SetSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the current top position
-
-STDMETHODIMP CBaseControlVideo::get_SourceTop(__out long *pSourceTop)
-{
- CheckPointer(pSourceTop,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
-
- GetSourceRect(&SourceRect);
- *pSourceTop = SourceRect.top;
- return NOERROR;
-}
-
-
-// Set the source height
-
-STDMETHODIMP CBaseControlVideo::put_SourceHeight(long SourceHeight)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
- GetSourceRect(&SourceRect);
- SourceRect.bottom = SourceRect.top + SourceHeight;
-
- // Check the source rectangle is valid
-
- HRESULT hr = CheckSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the source rectangle
-
- hr = SetSourceRect(&SourceRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the current source height
-
-STDMETHODIMP CBaseControlVideo::get_SourceHeight(__out long *pSourceHeight)
-{
- CheckPointer(pSourceHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT SourceRect;
-
- GetSourceRect(&SourceRect);
- *pSourceHeight = HEIGHT(&SourceRect);
- return NOERROR;
-}
-
-
-// Set the target left position, the target rectangle we get back from the
-// window object is a true rectangle in left,top,right and bottom positions
-// so all we have to do is to update the left position and pass it back. We
-// must keep the current width constant when we're updating this property
-
-STDMETHODIMP CBaseControlVideo::put_DestinationLeft(long DestinationLeft)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
- GetTargetRect(&DestinationRect);
- DestinationRect.right = DestinationLeft + WIDTH(&DestinationRect);
- DestinationRect.left = DestinationLeft;
-
- // Check the target rectangle is valid
-
- HRESULT hr = CheckTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the new target rectangle
-
- hr = SetTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the left position for the destination rectangle
-
-STDMETHODIMP CBaseControlVideo::get_DestinationLeft(__out long *pDestinationLeft)
-{
- CheckPointer(pDestinationLeft,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
-
- GetTargetRect(&DestinationRect);
- *pDestinationLeft = DestinationRect.left;
- return NOERROR;
-}
-
-
-// Set the destination width
-
-STDMETHODIMP CBaseControlVideo::put_DestinationWidth(long DestinationWidth)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
- GetTargetRect(&DestinationRect);
- DestinationRect.right = DestinationRect.left + DestinationWidth;
-
- // Check the target rectangle is valid
-
- HRESULT hr = CheckTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the new target rectangle
-
- hr = SetTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the width for the destination rectangle
-
-STDMETHODIMP CBaseControlVideo::get_DestinationWidth(__out long *pDestinationWidth)
-{
- CheckPointer(pDestinationWidth,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
-
- GetTargetRect(&DestinationRect);
- *pDestinationWidth = WIDTH(&DestinationRect);
- return NOERROR;
-}
-
-
-// Set the target top position - changing this property does not affect the
-// current target height. So changing this shunts the target rectangle up and
-// down appropriately. Changing the height complements this functionality by
-// keeping the top position constant and simply changing the target height
-
-STDMETHODIMP CBaseControlVideo::put_DestinationTop(long DestinationTop)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
- GetTargetRect(&DestinationRect);
- DestinationRect.bottom = DestinationTop + HEIGHT(&DestinationRect);
- DestinationRect.top = DestinationTop;
-
- // Check the target rectangle is valid
-
- HRESULT hr = CheckTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the new target rectangle
-
- hr = SetTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the top position for the destination rectangle
-
-STDMETHODIMP CBaseControlVideo::get_DestinationTop(__out long *pDestinationTop)
-{
- CheckPointer(pDestinationTop,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
-
- GetTargetRect(&DestinationRect);
- *pDestinationTop = DestinationRect.top;
- return NOERROR;
-}
-
-
-// Set the destination height
-
-STDMETHODIMP CBaseControlVideo::put_DestinationHeight(long DestinationHeight)
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
- GetTargetRect(&DestinationRect);
- DestinationRect.bottom = DestinationRect.top + DestinationHeight;
-
- // Check the target rectangle is valid
-
- HRESULT hr = CheckTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now set the new target rectangle
-
- hr = SetTargetRect(&DestinationRect);
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return the height for the destination rectangle
-
-STDMETHODIMP CBaseControlVideo::get_DestinationHeight(__out long *pDestinationHeight)
-{
- CheckPointer(pDestinationHeight,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- RECT DestinationRect;
-
- GetTargetRect(&DestinationRect);
- *pDestinationHeight = HEIGHT(&DestinationRect);
- return NOERROR;
-}
-
-
-// Reset the source rectangle to the full video dimensions
-
-STDMETHODIMP CBaseControlVideo::SetDefaultSourcePosition()
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- HRESULT hr = SetDefaultSourceRect();
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return S_OK if we're using the default source otherwise S_FALSE
-
-STDMETHODIMP CBaseControlVideo::IsUsingDefaultSource()
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- return IsDefaultSourceRect();
-}
-
-
-// Reset the video renderer to use the entire playback area
-
-STDMETHODIMP CBaseControlVideo::SetDefaultDestinationPosition()
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- HRESULT hr = SetDefaultTargetRect();
- if (FAILED(hr)) {
- return hr;
- }
- return OnUpdateRectangles();
-}
-
-
-// Return S_OK if we're using the default target otherwise S_FALSE
-
-STDMETHODIMP CBaseControlVideo::IsUsingDefaultDestination()
-{
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- return IsDefaultTargetRect();
-}
-
-
-// Return a copy of the current image in the video renderer
-
-STDMETHODIMP
-CBaseControlVideo::GetCurrentImage(__inout long *pBufferSize,__out_bcount_part(*pBufferSize, *pBufferSize) long *pVideoImage)
-{
- CheckPointer(pBufferSize,E_POINTER);
- CheckConnected(m_pPin,VFW_E_NOT_CONNECTED);
- CAutoLock cInterfaceLock(m_pInterfaceLock);
- FILTER_STATE State;
-
- // Make sure we are in a paused state
-
- if (pVideoImage != NULL) {
- m_pFilter->GetState(0,&State);
- if (State != State_Paused) {
- return VFW_E_NOT_PAUSED;
- }
- return GetStaticImage(pBufferSize,pVideoImage);
- }
-
- // Just return the memory required
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- RECT SourceRect;
- GetSourceRect(&SourceRect);
- return GetImageSize(pVideoInfo,pBufferSize,&SourceRect);
-}
-
-
-// An application has two ways of using GetCurrentImage, one is to pass a real
-// buffer which should be filled with the current image. The other is to pass
-// a NULL buffer pointer which is interpreted as asking us to return how much
-// memory is required for the image. The constraints for when the latter can
-// be called are much looser. To calculate the memory required we synthesize
-// a VIDEOINFO that takes into account the source rectangle that's being used
-
-HRESULT CBaseControlVideo::GetImageSize(__in VIDEOINFOHEADER *pVideoInfo,
- __out long *pBufferSize,
- __in RECT *pSourceRect)
-{
- NOTE("Entering GetImageSize");
- ASSERT(pSourceRect);
-
- // Check we have the correct input parameters
-
- if (pSourceRect == NULL ||
- pVideoInfo == NULL ||
- pBufferSize == NULL) {
-
- return E_UNEXPECTED;
- }
-
- // Is the data format compatible
-
- if (pVideoInfo->bmiHeader.biCompression != BI_RGB) {
- if (pVideoInfo->bmiHeader.biCompression != BI_BITFIELDS) {
- return E_INVALIDARG;
- }
- }
-
- ASSERT(IsRectEmpty(pSourceRect) == FALSE);
-
- BITMAPINFOHEADER bih;
- bih.biWidth = WIDTH(pSourceRect);
- bih.biHeight = HEIGHT(pSourceRect);
- bih.biBitCount = pVideoInfo->bmiHeader.biBitCount;
- LONG Size = DIBSIZE(bih);
- Size += GetBitmapFormatSize(HEADER(pVideoInfo)) - SIZE_PREHEADER;
- *pBufferSize = Size;
-
- return NOERROR;
-}
-
-
-// Given an IMediaSample containing a linear buffer with an image and a type
-// describing the bitmap make a rendering of the image into the output buffer
-// This may be called by derived classes who render typical video images to
-// handle the IBasicVideo GetCurrentImage method. The pVideoImage pointer may
-// be NULL when passed to GetCurrentImage in which case GetImageSize will be
-// called instead, which will just do the calculation of the memory required
-
-HRESULT CBaseControlVideo::CopyImage(IMediaSample *pMediaSample,
- __in VIDEOINFOHEADER *pVideoInfo,
- __inout long *pBufferSize,
- __out_bcount_part(*pBufferSize, *pBufferSize) BYTE *pVideoImage,
- __in RECT *pSourceRect)
-{
- NOTE("Entering CopyImage");
- ASSERT(pSourceRect);
- BYTE *pCurrentImage;
-
- // Check we have an image to copy
-
- if (pMediaSample == NULL || pSourceRect == NULL ||
- pVideoInfo == NULL || pVideoImage == NULL ||
- pBufferSize == NULL) {
-
- return E_UNEXPECTED;
- }
-
- // Is the data format compatible
-
- if (pVideoInfo->bmiHeader.biCompression != BI_RGB) {
- if (pVideoInfo->bmiHeader.biCompression != BI_BITFIELDS) {
- return E_INVALIDARG;
- }
- }
-
- if (*pBufferSize < 0) {
- return E_INVALIDARG;
- }
-
- // Arbitrarily large size to prevent integer overflow problems
- if (pVideoInfo->bmiHeader.biSize > 4096)
- {
- return E_INVALIDARG;
- }
-
- ASSERT(IsRectEmpty(pSourceRect) == FALSE);
-
- BITMAPINFOHEADER bih;
- bih.biWidth = WIDTH(pSourceRect);
- bih.biHeight = HEIGHT(pSourceRect);
- bih.biBitCount = pVideoInfo->bmiHeader.biBitCount;
- DWORD Size = GetBitmapFormatSize(HEADER(pVideoInfo)) - SIZE_PREHEADER;
- DWORD Total;
- DWORD dwDibSize;
-
- if( !ValidateBitmapInfoHeader( HEADER(pVideoInfo), Size)) {
- return E_INVALIDARG;
- }
-
- // ValidateBitmapInfoHeader checks this but for some reason code scanning
- // tools aren't picking up the annotation
- __analysis_assume(Size >= sizeof(BITMAPINFOHEADER));
-
- if (FAILED(SAFE_DIBSIZE(&bih, &dwDibSize))) {
- return E_INVALIDARG;
- }
-
- if (FAILED(DWordAdd(Size, dwDibSize, &Total))) {
- return E_INVALIDARG;
- }
-
- // Make sure we have a large enough buffer
-
- if ((DWORD)*pBufferSize < Total) {
- return E_OUTOFMEMORY;
- }
-
- // Copy the BITMAPINFO
-
- CopyMemory((PVOID)pVideoImage, (PVOID)&pVideoInfo->bmiHeader, Size);
- ((BITMAPINFOHEADER *)pVideoImage)->biWidth = WIDTH(pSourceRect);
- ((BITMAPINFOHEADER *)pVideoImage)->biHeight = HEIGHT(pSourceRect);
- ((BITMAPINFOHEADER *)pVideoImage)->biSizeImage = DIBSIZE(bih);
- BYTE *pImageData = pVideoImage + Size;
-
- // Get the pointer to it's image data
-
- HRESULT hr = pMediaSample->GetPointer(&pCurrentImage);
- if (FAILED(hr)) {
- return hr;
- }
-
- // Now we are ready to start copying the source scan lines
-
- LONG ScanLine = (pVideoInfo->bmiHeader.biBitCount / 8) * WIDTH(pSourceRect);
- LONG LinesToSkip = pVideoInfo->bmiHeader.biHeight;
- LinesToSkip -= pSourceRect->top + HEIGHT(pSourceRect);
- pCurrentImage += LinesToSkip * DIBWIDTHBYTES(pVideoInfo->bmiHeader);
- pCurrentImage += pSourceRect->left * (pVideoInfo->bmiHeader.biBitCount / 8);
-
- // Even money on this GP faulting sometime...
-
- for (LONG Line = 0;Line < HEIGHT(pSourceRect);Line++) {
- CopyMemory((PVOID)pImageData, (PVOID)pCurrentImage, ScanLine);
- pImageData += DIBWIDTHBYTES(*(BITMAPINFOHEADER *)pVideoImage);
- pCurrentImage += DIBWIDTHBYTES(pVideoInfo->bmiHeader);
- }
- return NOERROR;
-}
-
-
-// Called when we change media types either during connection or dynamically
-// We inform the filter graph and therefore the application that the video
-// size may have changed, we don't bother looking to see if it really has as
-// we leave that to the application - the dimensions are the event parameters
-
-HRESULT CBaseControlVideo::OnVideoSizeChange()
-{
- // Get the video format from the derived class
-
- VIDEOINFOHEADER *pVideoInfo = GetVideoFormat();
- if (pVideoInfo == NULL)
- return E_OUTOFMEMORY;
- WORD Width = (WORD) pVideoInfo->bmiHeader.biWidth;
- WORD Height = (WORD) pVideoInfo->bmiHeader.biHeight;
-
- return m_pFilter->NotifyEvent(EC_VIDEO_SIZE_CHANGED,
- MAKELPARAM(Width,Height),
- MAKEWPARAM(0,0));
-}
-
-
-// Set the video source rectangle. We must check the source rectangle against
-// the actual video dimensions otherwise when we come to draw the pictures we
-// get access violations as GDI tries to touch data outside of the image data
-// Although we store the rectangle in left, top, right and bottom coordinates
-// instead of left, top, width and height as OLE uses we do take into account
-// that the rectangle is used up to, but not including, the right column and
-// bottom row of pixels, see the Win32 documentation on RECT for more details
-
-HRESULT CBaseControlVideo::CheckSourceRect(__in RECT *pSourceRect)
-{
- CheckPointer(pSourceRect,E_POINTER);
- LONG Width,Height;
- GetVideoSize(&Width,&Height);
-
- // Check the coordinates are greater than zero
- // and that the rectangle is valid (left<right, top<bottom)
-
- if ((pSourceRect->left >= pSourceRect->right) ||
- (pSourceRect->left < 0) ||
- (pSourceRect->top >= pSourceRect->bottom) ||
- (pSourceRect->top < 0)) {
-
- return E_INVALIDARG;
- }
-
- // Check the coordinates are less than the extents
-
- if ((pSourceRect->right > Width) ||
- (pSourceRect->bottom > Height)) {
-
- return E_INVALIDARG;
- }
- return NOERROR;
-}
-
-
-// Check the target rectangle has some valid coordinates, which amounts to
-// little more than checking the destination rectangle isn't empty. Derived
-// classes may call this when they have their SetTargetRect method called to
-// check the rectangle validity, we do not update the rectangles passed in
-// Although we store the rectangle in left, top, right and bottom coordinates
-// instead of left, top, width and height as OLE uses we do take into account
-// that the rectangle is used up to, but not including, the right column and
-// bottom row of pixels, see the Win32 documentation on RECT for more details
-
-HRESULT CBaseControlVideo::CheckTargetRect(__in RECT *pTargetRect)
-{
- // Check the pointer is valid
-
- if (pTargetRect == NULL) {
- return E_POINTER;
- }
-
- // These overflow the WIDTH and HEIGHT checks
-
- if (pTargetRect->left > pTargetRect->right ||
- pTargetRect->top > pTargetRect->bottom) {
- return E_INVALIDARG;
- }
-
- // Check the rectangle has valid coordinates
-
- if (WIDTH(pTargetRect) <= 0 || HEIGHT(pTargetRect) <= 0) {
- return E_INVALIDARG;
- }
-
- ASSERT(IsRectEmpty(pTargetRect) == FALSE);
- return NOERROR;
-}
-
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