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reactos/win32ss/user/ntuser/cursoricon.c
Serge Gautherie fd331f1494 [NTUSER] UserSetCursorPos(): Use an early return 
Addendum to 76290a6 (0.4.15-dev-7889).
2024-04-20 13:57:35 -06:00

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Win32k subsystem
* PURPOSE: Cursor and icon functions
* FILE: win32ss/user/ntuser/cursoricon.c
* PROGRAMER: ReactOS Team
*/
/*
* We handle two types of cursors/icons:
* - Private
* Loaded without LR_SHARED flag
* Private to a process
* Can be deleted by calling NtDestroyCursorIcon()
* CurIcon->hModule, CurIcon->hRsrc and CurIcon->hGroupRsrc set to NULL
* - Shared
* Loaded with LR_SHARED flag
* Possibly shared by multiple processes
* Immune to NtDestroyCursorIcon()
* CurIcon->hModule, CurIcon->hRsrc and CurIcon->hGroupRsrc are valid
*/
#include <win32k.h>
DBG_DEFAULT_CHANNEL(UserIcon);
SYSTEM_CURSORINFO gSysCursorInfo;
PCURICON_OBJECT gcurFirst = NULL; // After all is done, this should be WINLOGO!
//
// System Cursors
//
SYSTEMCURICO gasyscur[] = {
{OCR_NORMAL, NULL},
{OCR_IBEAM, NULL},
{OCR_WAIT, NULL},
{OCR_CROSS, NULL},
{OCR_UP, NULL},
{OCR_ICON, NULL},
{OCR_SIZE, NULL},
{OCR_SIZENWSE, NULL},
{OCR_SIZENESW, NULL},
{OCR_SIZEWE, NULL},
{OCR_SIZENS, NULL},
{OCR_SIZEALL, NULL},
{OCR_NO, NULL},
{OCR_HAND, NULL},
{OCR_APPSTARTING,NULL},
{OCR_HELP, NULL},
};
//
// System Icons
//
SYSTEMCURICO gasysico[] = {
{OIC_SAMPLE, NULL},
{OIC_HAND, NULL},
{OIC_QUES, NULL},
{OIC_BANG, NULL},
{OIC_NOTE, NULL},
{OIC_WINLOGO,NULL},
};
BOOL
InitCursorImpl(VOID)
{
gSysCursorInfo.Enabled = FALSE;
gSysCursorInfo.ButtonsDown = 0;
gSysCursorInfo.bClipped = FALSE;
gSysCursorInfo.LastBtnDown = 0;
gSysCursorInfo.CurrentCursorObject = NULL;
gSysCursorInfo.ShowingCursor = -1;
gSysCursorInfo.ClickLockActive = FALSE;
gSysCursorInfo.ClickLockTime = 0;
return TRUE;
}
static
VOID
IntInsertCursorIntoList(
_Inout_ PCURICON_OBJECT pcur)
{
PPROCESSINFO ppi = pcur->head.ppi;
PCURICON_OBJECT *ppcurHead;
NT_ASSERT((pcur->CURSORF_flags & (CURSORF_GLOBAL|CURSORF_LRSHARED)) != 0);
NT_ASSERT((pcur->CURSORF_flags & CURSORF_LINKED) == 0);
/* Get the right list head */
ppcurHead = (pcur->CURSORF_flags & CURSORF_GLOBAL) ?
&gcurFirst : &ppi->pCursorCache;
UserReferenceObject(pcur);
pcur->pcurNext = *ppcurHead;
*ppcurHead = pcur;
pcur->CURSORF_flags |= CURSORF_LINKED;
}
// FIXME: should think about using a LIST_ENTRY!
static
VOID
IntRemoveCursorFromList(
_Inout_ PCURICON_OBJECT pcur)
{
PPROCESSINFO ppi = pcur->head.ppi;
PCURICON_OBJECT *ppcurHead;
PCURICON_OBJECT *ppcur;
NT_ASSERT((pcur->CURSORF_flags & (CURSORF_GLOBAL|CURSORF_LRSHARED)) != 0);
NT_ASSERT((pcur->CURSORF_flags & CURSORF_LINKED) != 0);
/* Get the right list head */
ppcurHead = (pcur->CURSORF_flags & CURSORF_GLOBAL) ?
&gcurFirst : &ppi->pCursorCache;
/* Loop all cursors in the cache */
for (ppcur = ppcurHead;
(*ppcur) != NULL;
ppcur = &(*ppcur)->pcurNext)
{
/* Check if this is the one we are looking for */
if ((*ppcur) == pcur)
{
/* Remove it from the list */
(*ppcur) = pcur->pcurNext;
/* Dereference it */
UserDereferenceObject(pcur);
pcur->CURSORF_flags &= ~CURSORF_LINKED;
return;
}
}
/* We did not find it, this must not happen */
NT_ASSERT(FALSE);
}
VOID
IntLoadSystenIcons(HICON hcur, DWORD id)
{
PCURICON_OBJECT pcur;
int i;
PPROCESSINFO ppi;
if (hcur)
{
pcur = UserGetCurIconObject(hcur);
if (!pcur)
{
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
return;
}
ppi = PsGetCurrentProcessWin32Process();
if (!(ppi->W32PF_flags & W32PF_CREATEDWINORDC))
return;
// Set Small Window Icon and do not link.
if ( id == OIC_WINLOGO+1 )
{
pcur->CURSORF_flags |= CURSORF_GLOBAL;
UserReferenceObject(pcur);
pcur->head.ppi = NULL;
return;
}
for (i = 0 ; i < 6; i++)
{
if (gasysico[i].type == id)
{
gasysico[i].handle = pcur;
pcur->CURSORF_flags |= CURSORF_GLOBAL;
//
// The active switch between LR shared and Global public.
// This is hacked around to support this while at the initial system start up.
//
pcur->head.ppi = NULL;
IntInsertCursorIntoList(pcur);
return;
}
}
}
}
PSYSTEM_CURSORINFO
IntGetSysCursorInfo(VOID)
{
return &gSysCursorInfo;
}
FORCEINLINE
BOOL
is_icon(PCURICON_OBJECT object)
{
return MAKEINTRESOURCE(object->rt) == RT_ICON;
}
/* This function creates a reference for the object! */
PCURICON_OBJECT FASTCALL UserGetCurIconObject(HCURSOR hCurIcon)
{
PCURICON_OBJECT CurIcon;
if (!hCurIcon)
{
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
return NULL;
}
if (UserObjectInDestroy(hCurIcon))
{
WARN("Requesting invalid/destroyed cursor.\n");
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
return NULL;
}
CurIcon = (PCURICON_OBJECT)UserReferenceObjectByHandle(hCurIcon, TYPE_CURSOR);
if (!CurIcon)
{
/* We never set ERROR_INVALID_ICON_HANDLE. lets hope noone ever checks for it */
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
return NULL;
}
ASSERT(CurIcon->head.cLockObj >= 1);
return CurIcon;
}
PCURICON_OBJECT
IntSystemSetCursor(PCURICON_OBJECT pcurNew)
{
PCURICON_OBJECT pcurOld = UserSetCursor(pcurNew, FALSE);
if (pcurNew) UserReferenceObject(pcurNew);
if (pcurOld) UserDereferenceObject(pcurOld);
return pcurOld;
}
BOOL UserSetCursorPos( INT x, INT y, DWORD flags, ULONG_PTR dwExtraInfo, BOOL Hook)
{
PWND DesktopWindow;
PSYSTEM_CURSORINFO CurInfo;
MSG Msg;
RECTL rcClip;
POINT pt;
if (!(DesktopWindow = UserGetDesktopWindow()))
{
return FALSE;
}
CurInfo = IntGetSysCursorInfo();
/* Clip cursor position */
if (!CurInfo->bClipped)
rcClip = DesktopWindow->rcClient;
else
rcClip = CurInfo->rcClip;
if (x >= rcClip.right) x = rcClip.right - 1;
if (x < rcClip.left) x = rcClip.left;
if (y >= rcClip.bottom) y = rcClip.bottom - 1;
if (y < rcClip.top) y = rcClip.top;
/* Nothing to do if position did not actually change */
if (x == gpsi->ptCursor.x && y == gpsi->ptCursor.y)
return TRUE;
pt.x = x;
pt.y = y;
/* 1. Generate a mouse move message, this sets the htEx and Track Window too */
Msg.message = WM_MOUSEMOVE;
Msg.wParam = UserGetMouseButtonsState();
Msg.lParam = MAKELPARAM(x, y);
Msg.pt = pt;
co_MsqInsertMouseMessage(&Msg, flags, dwExtraInfo, Hook);
/* 2. Store the new cursor position */
gpsi->ptCursor = pt;
return TRUE;
}
HANDLE
IntCreateCurIconHandle(BOOLEAN Animated)
{
PCURICON_OBJECT CurIcon;
HANDLE hCurIcon;
CurIcon = UserCreateObject(
gHandleTable,
NULL,
GetW32ThreadInfo(),
&hCurIcon,
TYPE_CURSOR,
Animated ? sizeof(ACON) : sizeof(CURICON_OBJECT));
if (!CurIcon)
{
EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
return FALSE;
}
if (Animated)
{
/* We MUST set this flag, to track whether this is an ACON! */
CurIcon->CURSORF_flags |= CURSORF_ACON;
}
NT_ASSERT(CurIcon->pcurNext == NULL);
UserDereferenceObject(CurIcon);
return hCurIcon;
}
BOOLEAN
IntDestroyCurIconObject(
_In_ PVOID Object)
{
PCURICON_OBJECT CurIcon = Object;
/* Check if the cursor is in a list */
if (CurIcon->CURSORF_flags & CURSORF_LINKED)
{
/* Remove the cursor from it's list */
IntRemoveCursorFromList(CurIcon);
}
/* We just mark the handle as being destroyed.
* Deleting all the stuff will be deferred to the actual struct free. */
UserDeleteObject(UserHMGetHandle(CurIcon), TYPE_CURSOR);
return TRUE;
}
VOID
FreeCurIconObject(
_In_ PVOID Object)
{
PCURICON_OBJECT CurIcon = Object;
if (!(CurIcon->CURSORF_flags & CURSORF_ACON))
{
HBITMAP bmpMask = CurIcon->hbmMask;
HBITMAP bmpColor = CurIcon->hbmColor;
HBITMAP bmpAlpha = CurIcon->hbmAlpha;
/* Delete bitmaps */
if (bmpMask)
{
GreSetObjectOwner(bmpMask, GDI_OBJ_HMGR_POWNED);
NT_VERIFY(GreDeleteObject(bmpMask) == TRUE);
CurIcon->hbmMask = NULL;
}
if (bmpColor)
{
GreSetObjectOwner(bmpColor, GDI_OBJ_HMGR_POWNED);
NT_VERIFY(GreDeleteObject(bmpColor) == TRUE);
CurIcon->hbmColor = NULL;
}
if (bmpAlpha)
{
GreSetObjectOwner(bmpAlpha, GDI_OBJ_HMGR_POWNED);
NT_VERIFY(GreDeleteObject(bmpAlpha) == TRUE);
CurIcon->hbmAlpha = NULL;
}
}
else
{
PACON AniCurIcon = (PACON)CurIcon;
UINT i;
for (i = 0; i < AniCurIcon->cpcur; i++)
{
UserDereferenceObject(AniCurIcon->aspcur[i]);
NT_VERIFY(IntDestroyCurIconObject(AniCurIcon->aspcur[i]) == TRUE);
}
ExFreePoolWithTag(AniCurIcon->aspcur, USERTAG_CURSOR);
}
if (CurIcon->CURSORF_flags & CURSORF_LRSHARED)
{
if (!IS_INTRESOURCE(CurIcon->strName.Buffer))
ExFreePoolWithTag(CurIcon->strName.Buffer, TAG_STRING);
if (CurIcon->atomModName)
RtlDeleteAtomFromAtomTable(gAtomTable, CurIcon->atomModName);
CurIcon->strName.Buffer = NULL;
CurIcon->atomModName = 0;
}
/* Finally free the thing */
FreeProcMarkObject(CurIcon);
}
VOID FASTCALL
IntCleanupCurIconCache(PPROCESSINFO Win32Process)
{
PCURICON_OBJECT CurIcon;
/* Run through the list of icon objects */
while (Win32Process->pCursorCache)
{
CurIcon = Win32Process->pCursorCache;
Win32Process->pCursorCache = CurIcon->pcurNext;
UserDereferenceObject(CurIcon);
}
}
/*
* @implemented
*/
_Success_(return != FALSE)
BOOL
NTAPI
NtUserGetIconInfo(
_In_ HANDLE hCurIcon,
_Out_opt_ PICONINFO IconInfo,
_Inout_opt_ PUNICODE_STRING lpModule,
_Inout_opt_ PUNICODE_STRING lpResName,
_Out_opt_ LPDWORD pbpp,
_In_ BOOL bInternal)
{
ICONINFO ii;
PCURICON_OBJECT CurIcon;
NTSTATUS Status = STATUS_SUCCESS;
BOOL Ret = FALSE;
DWORD colorBpp = 0;
TRACE("Enter NtUserGetIconInfo\n");
/* Check if something was actually asked */
if (!IconInfo && !lpModule && !lpResName)
{
WARN("Nothing to fill.\n");
EngSetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
UserEnterExclusive();
if (!(CurIcon = UserGetCurIconObject(hCurIcon)))
{
WARN("UserGetIconObject(0x%p) Failed.\n", hCurIcon);
UserLeave();
return FALSE;
}
/* Give back the icon information */
if (IconInfo)
{
PCURICON_OBJECT FrameCurIcon = CurIcon;
if (CurIcon->CURSORF_flags & CURSORF_ACON)
{
/* Get information from first frame. */
FrameCurIcon = ((PACON)CurIcon)->aspcur[0];
}
/* Fill data */
ii.fIcon = is_icon(FrameCurIcon);
ii.xHotspot = FrameCurIcon->xHotspot;
ii.yHotspot = FrameCurIcon->yHotspot;
/* Copy bitmaps */
ii.hbmMask = BITMAP_CopyBitmap(FrameCurIcon->hbmMask);
GreSetObjectOwner(ii.hbmMask, GDI_OBJ_HMGR_POWNED);
ii.hbmColor = BITMAP_CopyBitmap(FrameCurIcon->hbmColor);
GreSetObjectOwner(ii.hbmColor, GDI_OBJ_HMGR_POWNED);
colorBpp = FrameCurIcon->bpp;
/* Copy fields */
_SEH2_TRY
{
ProbeForWrite(IconInfo, sizeof(ICONINFO), 1);
RtlCopyMemory(IconInfo, &ii, sizeof(ICONINFO));
if (pbpp)
{
ProbeForWrite(pbpp, sizeof(DWORD), 1);
*pbpp = colorBpp;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
if (!NT_SUCCESS(Status))
{
WARN("Status: 0x%08lx\n", Status);
SetLastNtError(Status);
goto leave;
}
}
/* Give back the module name */
if (lpModule)
{
ULONG BufLen = 0;
if (!CurIcon->atomModName)
goto leave;
RtlQueryAtomInAtomTable(gAtomTable, CurIcon->atomModName, NULL, NULL, NULL, &BufLen);
/* Get the module name from the atom table */
_SEH2_TRY
{
BufLen += sizeof(WCHAR);
if (BufLen > (lpModule->MaximumLength))
{
lpModule->Length = 0;
lpModule->MaximumLength = BufLen;
}
else
{
ProbeForWrite(lpModule->Buffer, lpModule->MaximumLength, 1);
BufLen = lpModule->MaximumLength;
RtlQueryAtomInAtomTable(gAtomTable, CurIcon->atomModName, NULL, NULL, lpModule->Buffer, &BufLen);
lpModule->Length = BufLen;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
if (!NT_SUCCESS(Status))
{
SetLastNtError(Status);
goto leave;
}
}
if (lpResName)
{
if (!CurIcon->strName.Buffer)
goto leave;
/* Copy it */
_SEH2_TRY
{
ProbeForWrite(lpResName, sizeof(UNICODE_STRING), 1);
if (IS_INTRESOURCE(CurIcon->strName.Buffer))
{
lpResName->Buffer = CurIcon->strName.Buffer;
lpResName->Length = 0;
lpResName->MaximumLength = 0;
}
else if (lpResName->MaximumLength < CurIcon->strName.MaximumLength)
{
lpResName->Length = 0;
lpResName->MaximumLength = CurIcon->strName.MaximumLength;
}
else
{
ProbeForWrite(lpResName->Buffer, lpResName->MaximumLength, 1);
RtlCopyMemory(lpResName->Buffer, CurIcon->strName.Buffer, CurIcon->strName.Length);
lpResName->Length = CurIcon->strName.Length;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
}
if (!NT_SUCCESS(Status))
{
SetLastNtError(Status);
goto leave;
}
Ret = TRUE;
leave:
UserDereferenceObject(CurIcon);
TRACE("Leave NtUserGetIconInfo, ret=%i\n", Ret);
UserLeave();
return Ret;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserGetIconSize(
HANDLE hCurIcon,
UINT istepIfAniCur,
PLONG plcx, // &size.cx
PLONG plcy) // &size.cy
{
PCURICON_OBJECT CurIcon;
NTSTATUS Status = STATUS_SUCCESS;
BOOL bRet = FALSE;
TRACE("Enter NtUserGetIconSize\n");
UserEnterShared();
if (!(CurIcon = UserGetCurIconObject(hCurIcon)))
{
goto cleanup;
}
if (CurIcon->CURSORF_flags & CURSORF_ACON)
{
/* Use first frame for animated cursors */
PACON AniCurIcon = (PACON)CurIcon;
CurIcon = AniCurIcon->aspcur[0];
UserDereferenceObject(AniCurIcon);
UserReferenceObject(CurIcon);
}
_SEH2_TRY
{
ProbeForWrite(plcx, sizeof(LONG), 1);
*plcx = CurIcon->cx;
ProbeForWrite(plcy, sizeof(LONG), 1);
*plcy = CurIcon->cy;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
if (NT_SUCCESS(Status))
bRet = TRUE;
else
SetLastNtError(Status); // Maybe not, test this
UserDereferenceObject(CurIcon);
cleanup:
TRACE("Leave NtUserGetIconSize, ret=%i\n", bRet);
UserLeave();
return bRet;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserGetCursorInfo(
PCURSORINFO pci)
{
CURSORINFO SafeCi;
PSYSTEM_CURSORINFO CurInfo;
NTSTATUS Status = STATUS_SUCCESS;
PCURICON_OBJECT CurIcon;
BOOL Ret = FALSE;
TRACE("Enter NtUserGetCursorInfo\n");
UserEnterShared();
CurInfo = IntGetSysCursorInfo();
CurIcon = (PCURICON_OBJECT)CurInfo->CurrentCursorObject;
SafeCi.cbSize = sizeof(CURSORINFO);
SafeCi.flags = ((CurIcon && CurInfo->ShowingCursor >= 0) ? CURSOR_SHOWING : 0);
SafeCi.hCursor = (CurIcon ? UserHMGetHandle(CurIcon) : NULL);
SafeCi.ptScreenPos = gpsi->ptCursor;
_SEH2_TRY
{
if (pci->cbSize == sizeof(CURSORINFO))
{
ProbeForWrite(pci, sizeof(CURSORINFO), 1);
RtlCopyMemory(pci, &SafeCi, sizeof(CURSORINFO));
Ret = TRUE;
}
else
{
EngSetLastError(ERROR_INVALID_PARAMETER);
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
if (!NT_SUCCESS(Status))
{
SetLastNtError(Status);
}
TRACE("Leave NtUserGetCursorInfo, ret=%i\n", Ret);
UserLeave();
return Ret;
}
BOOL
APIENTRY
UserClipCursor(
RECTL *prcl)
{
PSYSTEM_CURSORINFO CurInfo;
PWND DesktopWindow = NULL;
if (!CheckWinstaAttributeAccess(WINSTA_WRITEATTRIBUTES))
{
return FALSE;
}
CurInfo = IntGetSysCursorInfo();
DesktopWindow = UserGetDesktopWindow();
if (prcl != NULL && DesktopWindow != NULL)
{
if (prcl->right < prcl->left || prcl->bottom < prcl->top)
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
CurInfo->bClipped = TRUE;
/* Set nw cliping region. Note: we can't use RECTL_bIntersectRect because
it sets rect to 0 0 0 0 when it's empty. For more info see monitor winetest */
CurInfo->rcClip.left = max(prcl->left, DesktopWindow->rcWindow.left);
CurInfo->rcClip.right = min(prcl->right, DesktopWindow->rcWindow.right);
if (CurInfo->rcClip.right < CurInfo->rcClip.left)
CurInfo->rcClip.right = CurInfo->rcClip.left;
CurInfo->rcClip.top = max(prcl->top, DesktopWindow->rcWindow.top);
CurInfo->rcClip.bottom = min(prcl->bottom, DesktopWindow->rcWindow.bottom);
if (CurInfo->rcClip.bottom < CurInfo->rcClip.top)
CurInfo->rcClip.bottom = CurInfo->rcClip.top;
/* Make sure cursor is in clipping region */
UserSetCursorPos(gpsi->ptCursor.x, gpsi->ptCursor.y, 0, 0, FALSE);
}
else
{
CurInfo->bClipped = FALSE;
}
return TRUE;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserClipCursor(
RECTL *prcl)
{
RECTL rclLocal;
BOOL bResult;
if (prcl)
{
_SEH2_TRY
{
/* Probe and copy rect */
ProbeForRead(prcl, sizeof(RECTL), 1);
rclLocal = *prcl;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
EngSetLastError(ERROR_INVALID_PARAMETER);
_SEH2_YIELD(return FALSE;)
}
_SEH2_END
prcl = &rclLocal;
}
UserEnterExclusive();
/* Call the internal function */
bResult = UserClipCursor(prcl);
UserLeave();
return bResult;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserDestroyCursor(
_In_ HANDLE hCurIcon,
_In_ BOOL bForce)
{
BOOL ret;
PCURICON_OBJECT CurIcon = NULL;
TRACE("Enter NtUserDestroyCursorIcon (%p, %i)\n", hCurIcon, bForce);
UserEnterExclusive();
CurIcon = UserGetCurIconObject(hCurIcon);
if (!CurIcon)
{
ret = FALSE;
goto leave;
}
if (!bForce)
{
/* Can not destroy global objects */
if (CurIcon->head.ppi == NULL)
{
ERR("Trying to delete global cursor!\n");
ret = TRUE;
goto leave;
}
/* Maybe we have good reasons not to destroy this object */
if (CurIcon->head.ppi != PsGetCurrentProcessWin32Process())
{
/* No way, you're not touching my cursor */
ret = FALSE;
goto leave;
}
if (CurIcon->CURSORF_flags & CURSORF_CURRENT)
{
WARN("Trying to delete current cursor!\n");
ret = FALSE;
goto leave;
}
if (CurIcon->CURSORF_flags & CURSORF_LRSHARED)
{
WARN("Trying to delete shared cursor.\n");
/* This one is not an error */
ret = TRUE;
goto leave;
}
}
/* Destroy the handle */
ret = IntDestroyCurIconObject(CurIcon);
leave:
if (CurIcon)
UserDereferenceObject(CurIcon);
TRACE("Leave NtUserDestroyCursorIcon, ret=%i\n", ret);
UserLeave();
return ret;
}
/*
* @implemented
*/
HICON
NTAPI
NtUserFindExistingCursorIcon(
_In_ PUNICODE_STRING pustrModule,
_In_ PUNICODE_STRING pustrRsrc,
_In_ FINDEXISTINGCURICONPARAM* param)
{
PCURICON_OBJECT CurIcon;
HICON Ret = NULL;
UNICODE_STRING ustrModuleSafe, ustrRsrcSafe;
FINDEXISTINGCURICONPARAM paramSafe;
NTSTATUS Status;
PPROCESSINFO pProcInfo = PsGetCurrentProcessWin32Process();
RTL_ATOM atomModName;
TRACE("Enter NtUserFindExistingCursorIcon\n");
_SEH2_TRY
{
ProbeForRead(param, sizeof(*param), 1);
RtlCopyMemory(&paramSafe, param, sizeof(paramSafe));
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
/* Capture resource name (it can be an INTRESOURCE == ATOM) */
Status = ProbeAndCaptureUnicodeStringOrAtom(&ustrRsrcSafe, pustrRsrc);
if (!NT_SUCCESS(Status))
return NULL;
Status = ProbeAndCaptureUnicodeString(&ustrModuleSafe, UserMode, pustrModule);
if (!NT_SUCCESS(Status))
goto done;
Status = RtlLookupAtomInAtomTable(gAtomTable, ustrModuleSafe.Buffer, &atomModName);
ReleaseCapturedUnicodeString(&ustrModuleSafe, UserMode);
if (!NT_SUCCESS(Status))
{
/* The module is not in the atom table. No chance to find the cursor */
goto done;
}
UserEnterShared();
CurIcon = pProcInfo->pCursorCache;
while (CurIcon)
{
/* Icon/cursor */
if (paramSafe.bIcon != is_icon(CurIcon))
{
CurIcon = CurIcon->pcurNext;
continue;
}
/* See if module names match */
if (atomModName == CurIcon->atomModName)
{
/* They do. Now see if this is the same resource */
if (IS_INTRESOURCE(CurIcon->strName.Buffer) != IS_INTRESOURCE(ustrRsrcSafe.Buffer))
{
/* One is an INT resource and the other is not -> no match */
CurIcon = CurIcon->pcurNext;
continue;
}
if (IS_INTRESOURCE(CurIcon->strName.Buffer))
{
if (CurIcon->strName.Buffer == ustrRsrcSafe.Buffer)
{
/* INT resources match */
break;
}
}
else if (RtlCompareUnicodeString(&ustrRsrcSafe, &CurIcon->strName, TRUE) == 0)
{
/* Resource name strings match */
break;
}
}
CurIcon = CurIcon->pcurNext;
}
/* Now search Global Cursors or Icons. */
if (CurIcon == NULL)
{
CurIcon = gcurFirst;
while (CurIcon)
{
/* Icon/cursor */
if (paramSafe.bIcon != is_icon(CurIcon))
{
CurIcon = CurIcon->pcurNext;
continue;
}
/* See if module names match */
if (atomModName == CurIcon->atomModName)
{
/* They do. Now see if this is the same resource */
if (IS_INTRESOURCE(CurIcon->strName.Buffer) != IS_INTRESOURCE(ustrRsrcSafe.Buffer))
{
/* One is an INT resource and the other is not -> no match */
CurIcon = CurIcon->pcurNext;
continue;
}
if (IS_INTRESOURCE(CurIcon->strName.Buffer))
{
if (CurIcon->strName.Buffer == ustrRsrcSafe.Buffer)
{
/* INT resources match */
break;
}
}
else if (RtlCompareUnicodeString(&ustrRsrcSafe, &CurIcon->strName, TRUE) == 0)
{
/* Resource name strings match */
break;
}
}
CurIcon = CurIcon->pcurNext;
}
}
if (CurIcon)
Ret = UserHMGetHandle(CurIcon);
UserLeave();
done:
if (!IS_INTRESOURCE(ustrRsrcSafe.Buffer))
ExFreePoolWithTag(ustrRsrcSafe.Buffer, TAG_STRING);
return Ret;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserGetClipCursor(
RECTL *lpRect)
{
PSYSTEM_CURSORINFO CurInfo;
RECTL Rect;
NTSTATUS Status;
BOOL Ret = FALSE;
TRACE("Enter NtUserGetClipCursor\n");
UserEnterShared();
if (!CheckWinstaAttributeAccess(WINSTA_READATTRIBUTES))
{
goto Exit; // Return FALSE
}
if (!lpRect)
goto Exit; // Return FALSE
CurInfo = IntGetSysCursorInfo();
if (CurInfo->bClipped)
{
Rect = CurInfo->rcClip;
}
else
{
Rect.left = 0;
Rect.top = 0;
Rect.right = UserGetSystemMetrics(SM_CXSCREEN);
Rect.bottom = UserGetSystemMetrics(SM_CYSCREEN);
}
Status = MmCopyToCaller(lpRect, &Rect, sizeof(RECT));
if (!NT_SUCCESS(Status))
{
SetLastNtError(Status);
goto Exit; // Return FALSE
}
Ret = TRUE;
Exit:
TRACE("Leave NtUserGetClipCursor, ret=%i\n", Ret);
UserLeave();
return Ret;
}
/*
* @implemented
*/
HCURSOR
APIENTRY
NtUserSetCursor(
HCURSOR hCursor)
{
PCURICON_OBJECT pcurOld, pcurNew;
HCURSOR hOldCursor = NULL;
TRACE("Enter NtUserSetCursor: %p\n", hCursor);
UserEnterExclusive();
if (hCursor)
{
pcurNew = UserGetCurIconObject(hCursor);
if (!pcurNew)
{
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
goto leave;
}
pcurNew->CURSORF_flags |= CURSORF_CURRENT;
}
else
{
pcurNew = NULL;
}
pcurOld = UserSetCursor(pcurNew, FALSE);
// If returning an old cursor than validate it, Justin Case!
if ( pcurOld &&
(pcurOld = UserGetObjectNoErr(gHandleTable, UserHMGetHandle(pcurOld), TYPE_CURSOR)))
{
hOldCursor = UserHMGetHandle(pcurOld);
/*
Problem:
System Global Cursors start out having at least 2 lock counts. If a system
cursor is the default cursor and is returned to the caller twice in its
life, the count will reach zero. Causing an assert to occur in objects.
This fixes a SeaMonkey crash while the mouse crosses a boundary.
*/
if (pcurOld->CURSORF_flags & CURSORF_GLOBAL)
{
TRACE("Returning Global Cursor hcur %p\n",hOldCursor);
/*if (pcurOld->head.cLockObj > 2) // Throttle down to 2.
{
UserDereferenceObject(pcurOld);
}
goto leave;*/
}
/* See if it was destroyed in the meantime */
if (UserObjectInDestroy(hOldCursor))
hOldCursor = NULL;
pcurOld->CURSORF_flags &= ~CURSORF_CURRENT;
UserDereferenceObject(pcurOld);
}
leave:
UserLeave();
return hOldCursor;
}
/*
* @unimplemented
*/
BOOL
APIENTRY
NtUserSetCursorContents(
HANDLE hCurIcon,
PICONINFO UnsafeIconInfo)
{
FIXME(" is UNIMPLEMENTED.\n");
return FALSE;
}
static
BOOL
IntSetCursorData(
_Inout_ PCURICON_OBJECT pcur,
_In_opt_ PUNICODE_STRING pustrName,
_In_ ATOM atomModName,
_In_ const CURSORDATA* pcursordata)
{
/* Check if the CURSORF_ACON is also set in the cursor data */
if (pcursordata->CURSORF_flags & CURSORF_ACON)
{
ERR("Mismatch in CURSORF_flags! cursor: 0x%08lx, data: 0x%08lx\n",
pcur->CURSORF_flags, pcursordata->CURSORF_flags);
return FALSE;
}
/* Check if this cursor was already set */
if (pcur->hbmMask != NULL)
{
ERR("Cursor data already set!\n");
return FALSE;
}
/* We need a mask */
if (pcursordata->hbmMask == NULL)
{
ERR("NtUserSetCursorIconData was got no hbmMask.\n");
EngSetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Take ownership of the mask bitmap */
if (!GreSetBitmapOwner(pcursordata->hbmMask, GDI_OBJ_HMGR_PUBLIC))
{
ERR("Failed to set ownership of hbmMask %p.\n", pcursordata->hbmMask);
return FALSE;
}
/* Check if we have a color bitmap */
if (pcursordata->hbmColor)
{
/* Take ownership of the color bitmap */
if (!GreSetBitmapOwner(pcursordata->hbmColor, GDI_OBJ_HMGR_PUBLIC))
{
ERR("Failed to set ownership of hbmColor %p.\n", pcursordata->hbmColor);
GreSetBitmapOwner(pcursordata->hbmMask, GDI_OBJ_HMGR_POWNED);
return FALSE;
}
}
/* Check if we have an alpha bitmap */
if (pcursordata->hbmAlpha)
{
/* Take ownership of the alpha bitmap */
if (!GreSetBitmapOwner(pcursordata->hbmAlpha, GDI_OBJ_HMGR_PUBLIC))
{
ERR("Failed to set ownership of hbmAlpha %p.\n", pcursordata->hbmAlpha);
GreSetBitmapOwner(pcursordata->hbmMask, GDI_OBJ_HMGR_POWNED);
if (pcursordata->hbmColor)
{
GreSetBitmapOwner(pcursordata->hbmColor, GDI_OBJ_HMGR_POWNED);
}
return FALSE;
}
}
/* Free the old name (Must be NULL atm, but later we might allow this) */
NT_ASSERT(pcur->strName.Buffer == NULL);
if (pcur->strName.Buffer != NULL)
{
if (!IS_INTRESOURCE(pcur->strName.Buffer))
{
ExFreePoolWithTag(pcur->strName.Buffer, TAG_STRING);
}
RtlInitEmptyUnicodeString(&pcur->strName, NULL, 0);
}
/* Free the module atom */
if (pcur->atomModName != 0)
{
NT_VERIFY(NT_SUCCESS(RtlDeleteAtomFromAtomTable(gAtomTable, pcur->atomModName)));
}
/* Now set the new cursor data */
pcur->atomModName = atomModName;
pcur->rt = pcursordata->rt;
pcur->CURSORF_flags = pcursordata->CURSORF_flags & CURSORF_USER_MASK;
pcur->xHotspot = pcursordata->xHotspot;
pcur->yHotspot = pcursordata->yHotspot;
pcur->hbmMask = pcursordata->hbmMask;
pcur->hbmColor = pcursordata->hbmColor;
pcur->hbmAlpha = pcursordata->hbmAlpha;
pcur->rcBounds.left = 0;
pcur->rcBounds.top = 0;
pcur->rcBounds.right = pcursordata->cx;
pcur->rcBounds.bottom = pcursordata->cy;
pcur->hbmUserAlpha = pcursordata->hbmUserAlpha;
pcur->bpp = pcursordata->bpp;
pcur->cx = pcursordata->cx;
pcur->cy = pcursordata->cy;
if (pustrName != NULL)
{
pcur->strName = *pustrName;
}
return TRUE;
}
static
BOOL
IntSetAconData(
_Inout_ PACON pacon,
_In_opt_ PUNICODE_STRING pustrName,
_In_ ATOM atomModName,
_In_ const CURSORDATA *pcursordata)
{
PCURICON_OBJECT *aspcur;
DWORD *aicur;
INT *ajifRate;
PCURSORDATA pcdFrame;
HCURSOR hcurFrame;
UINT cjSize, i;
NT_ASSERT((pacon->CURSORF_flags & CURSORF_ACON) != 0);
NT_ASSERT((pacon->CURSORF_flags & CURSORF_ACONFRAME) == 0);
NT_ASSERT((ULONG_PTR)pcursordata->aspcur > MmUserProbeAddress);
NT_ASSERT((ULONG_PTR)pcursordata->aicur > MmUserProbeAddress);
NT_ASSERT((ULONG_PTR)pcursordata->ajifRate > MmUserProbeAddress);
NT_ASSERT((pcursordata->CURSORF_flags & ~CURSORF_USER_MASK) == 0);
NT_ASSERT(pcursordata->cpcur > 0);
NT_ASSERT(pcursordata->cicur > 0);
/* Check if the CURSORF_ACON is also set in the cursor data */
if (!(pcursordata->CURSORF_flags & CURSORF_ACON))
{
ERR("Mismatch in CURSORF_flags! acon: 0x%08lx, data: 0x%08lx\n",
pacon->CURSORF_flags, pcursordata->CURSORF_flags);
return FALSE;
}
/* Check if this acon was already set */
if (pacon->aspcur != NULL)
{
ERR("Acon data already set!\n");
return FALSE;
}
/* Loop all frames indexes */
for (i = 0; i < pcursordata->cicur; i++)
{
/* Check if the index is within the range of the frames */
if (pcursordata->aicur[i] >= pcursordata->cpcur)
{
ERR("aicur[%lu] is out or range. Got %lu, cpcur = %u\n",
i, pcursordata->aicur[i], pcursordata->cpcur);
return FALSE;
}
/* FIXME: check the JIF rates? */
}
/* Calculate size: one cursor object for each frame, and a frame
index and jiffies for each "step" */
cjSize = (pcursordata->cpcur * sizeof(CURICON_OBJECT*)) +
(pcursordata->cicur * sizeof(DWORD)) +
(pcursordata->cicur * sizeof(INT));
/* Allocate a buffer */
aspcur = ExAllocatePoolWithTag(PagedPool, cjSize, USERTAG_CURSOR);
if (aspcur == NULL)
{
ERR("Failed to allocate memory (cpcur = %u, cicur = %u)\n",
pcursordata->cpcur, pcursordata->cicur);
return FALSE;
}
/* Set the pointers */
aicur = (DWORD*)&aspcur[pcursordata->cpcur];
ajifRate = (INT*)&aicur[pcursordata->cicur];
/* Copy the values */
RtlCopyMemory(aicur, pcursordata->aicur, pcursordata->cicur * sizeof(DWORD));
RtlCopyMemory(ajifRate, pcursordata->ajifRate, pcursordata->cicur * sizeof(INT));
/* Zero out the array, so we can handle cleanup */
RtlZeroMemory(aspcur, pcursordata->cpcur * sizeof(PCURICON_OBJECT));
/* Get a pointer to the cursor data for each frame */
pcdFrame = pcursordata->aspcur;
/* Create the cursors */
for (i = 0; i < pcursordata->cpcur; i++)
{
/* Create a cursor for this frame */
hcurFrame = IntCreateCurIconHandle(FALSE);
if (hcurFrame == NULL)
{
ERR("Failed to create a cursor for frame %u\n", i);
goto Cleanup;
}
/* Get a pointer to the frame cursor */
aspcur[i] = UserGetCurIconObject(hcurFrame);
_PRAGMA_WARNING_SUPPRESS(__WARNING_READ_OVERRUN);
NT_ASSERT(aspcur[i] != NULL);
/* Check if the flags are valid */
if (pcdFrame->CURSORF_flags & ~(CURSORF_USER_MASK|CURSORF_ACONFRAME))
{
ERR("Invalid flags for acon frame %u: 0x%08lx\n",
i, pcdFrame->CURSORF_flags);
goto Cleanup;
}
/* Set the cursor data for this frame */
if (!IntSetCursorData(aspcur[i], NULL, 0, &pcdFrame[i]))
{
ERR("Failed to set cursor data for frame %u\n", i);
goto Cleanup;
}
/* Mark this cursor as an acon frame */
aspcur[i]->CURSORF_flags |= CURSORF_ACONFRAME;
}
/* Free the old name (Must be NULL atm.) */
NT_ASSERT(pacon->strName.Buffer == NULL);
if (pacon->strName.Buffer != NULL)
{
if (!IS_INTRESOURCE(pacon->strName.Buffer))
{
ExFreePoolWithTag(pacon->strName.Buffer, TAG_STRING);
}
RtlInitEmptyUnicodeString(&pacon->strName, NULL, 0);
}
/* Free the module atom */
if (pacon->atomModName != 0)
{
NT_VERIFY(NT_SUCCESS(RtlDeleteAtomFromAtomTable(gAtomTable, pacon->atomModName)));
}
/* Free the previous frames */
if (pacon->aspcur != NULL)
{
for (i = 0; i < pacon->cpcur; i++)
{
UserDereferenceObject(pacon->aspcur[i]);
NT_VERIFY(IntDestroyCurIconObject(pacon->aspcur[i]) == TRUE);
}
ExFreePoolWithTag(pacon->aspcur, USERTAG_CURSOR);
}
/* Finally set the data in the acon */
pacon->atomModName = atomModName;
pacon->rt = pcursordata->rt;
pacon->CURSORF_flags = pcursordata->CURSORF_flags & CURSORF_USER_MASK;
pacon->cpcur = pcursordata->cpcur;
pacon->cicur = pcursordata->cicur;
pacon->aspcur = aspcur;
pacon->aicur = aicur;
pacon->ajifRate = ajifRate;
pacon->iicur = 0;
if (pustrName != NULL)
{
pacon->strName = *pustrName;
}
return TRUE;
Cleanup:
/* Clean up the cursors we created */
for (i = 0; i < pcursordata->cpcur; i++)
{
if (aspcur[i] == NULL)
break;
/* Destroy this cursor */
UserDereferenceObject(aspcur[i]);
NT_VERIFY(IntDestroyCurIconObject(aspcur[i]) == TRUE);
}
/* Delete the allocated structure */
ExFreePoolWithTag(aspcur, USERTAG_CURSOR);
return FALSE;
}
BOOL
APIENTRY
UserSetCursorIconData(
_In_ HCURSOR hcursor,
_In_opt_ PUNICODE_STRING pustrModule,
_In_opt_ PUNICODE_STRING pustrRsrc,
_In_ PCURSORDATA pcursordata)
{
PCURICON_OBJECT pcur;
ATOM atomModName;
NTSTATUS status;
BOOL bResult;
/* Do we have a module name? */
if (pustrModule != NULL)
{
/* Create an atom for the module name */
status = RtlAddAtomToAtomTable(gAtomTable,
pustrModule->Buffer,
&atomModName);
if (!NT_SUCCESS(status))
{
ERR("Failed to create atom from module name '%wZ': 0x%08lx\n",
pustrModule, status);
return FALSE;
}
}
else
{
/* No module name atom */
atomModName = 0;
}
/* Reference the cursor */
pcur = UserGetCurIconObject(hcursor);
if (pcur == NULL)
{
ERR("Failed to reference cursor %p\n", hcursor);
bResult = FALSE;
goto Exit;
}
/* Check if this is an acon */
if (pcur->CURSORF_flags & CURSORF_ACON)
{
bResult = IntSetAconData((PACON)pcur,
pustrRsrc,
atomModName,
pcursordata);
}
else
{
bResult = IntSetCursorData(pcur,
pustrRsrc,
atomModName,
pcursordata);
}
Exit:
/* Check if we had success */
if (bResult != FALSE)
{
/* Check if this is an LRSHARED cursor now */
if (pcur->CURSORF_flags & CURSORF_LRSHARED)
{
/* Insert the cursor into the list. */
IntInsertCursorIntoList(pcur);
}
}
else
{
/* Cleanup on failure */
if (atomModName != 0)
{
NT_VERIFY(NT_SUCCESS(RtlDeleteAtomFromAtomTable(gAtomTable, atomModName)));
}
}
/* Dereference the cursor and return the result */
if (pcur)
UserDereferenceObject(pcur);
return bResult;
}
/*
* @implemented
*/
__kernel_entry
BOOL
APIENTRY
NtUserSetCursorIconData(
_In_ HCURSOR hcursor,
_In_opt_ PUNICODE_STRING pustrModule,
_In_opt_ PUNICODE_STRING pustrRsrc,
_In_ const CURSORDATA* pCursorData)
{
CURSORDATA cursordata;
UNICODE_STRING ustrModule, ustrRsrc;
_SEH2_VOLATILE PVOID pvBuffer;
CURSORDATA* aspcur;
DWORD* aicur;
PINT ajifRate;
UINT cjSize;
NTSTATUS status;
BOOL bResult = FALSE;
TRACE("Enter NtUserSetCursorIconData\n");
/* Initialize buffer, so we can handle cleanup */
ustrRsrc.Buffer = NULL;
ustrModule.Buffer = NULL;
pvBuffer = NULL;
_SEH2_TRY
{
/* Probe and capture the cursor data structure */
ProbeForRead(pCursorData, sizeof(*pCursorData), 1);
cursordata = *pCursorData;
/* Check if this is an animated cursor */
if (cursordata.CURSORF_flags & CURSORF_ACON)
{
/* Check of the range is ok */
if ((cursordata.cpcur == 0) || (cursordata.cicur == 0) ||
(cursordata.cpcur > 1000) || (cursordata.cicur > 1000))
{
ERR("Range error (cpcur = %u, cicur = %u)\n",
cursordata.cpcur, cursordata.cicur);
goto Exit;
}
/* Calculate size: one cursor data structure for each frame,
and a frame index and jiffies for each "step" */
cjSize = (cursordata.cpcur * sizeof(CURSORDATA)) +
(cursordata.cicur * sizeof(DWORD)) +
(cursordata.cicur * sizeof(INT));
/* Allocate a buffer */
pvBuffer = ExAllocatePoolWithTag(PagedPool, cjSize, USERTAG_CURSOR);
if (pvBuffer == NULL)
{
ERR("Failed to allocate memory (cpcur = %u, cicur = %u)\n",
cursordata.cpcur, cursordata.cicur);
goto Exit;
}
/* Calculate the kernel mode pointers */
aspcur = (CURSORDATA*)pvBuffer;
aicur = (DWORD*)&aspcur[cursordata.cpcur];
ajifRate = (INT*)&aicur[cursordata.cicur];
/* Probe and copy aspcur */
ProbeForRead(cursordata.aspcur, cursordata.cpcur * sizeof(CURSORDATA), 1);
RtlCopyMemory(aspcur,
cursordata.aspcur,
cursordata.cpcur * sizeof(CURSORDATA));
/* Probe and copy aicur */
ProbeForRead(cursordata.aicur, cursordata.cicur * sizeof(DWORD), 1);
RtlCopyMemory(aicur,
cursordata.aicur,
cursordata.cicur * sizeof(DWORD));
/* Probe and copy ajifRate */
ProbeForRead(cursordata.ajifRate, cursordata.cicur * sizeof(INT), 1);
RtlCopyMemory(ajifRate,
cursordata.ajifRate,
cursordata.cicur * sizeof(INT));
/* Set the new pointers */
cursordata.aspcur = aspcur;
cursordata.aicur = aicur;
cursordata.ajifRate = ajifRate;
}
else
{
/* This is a standard cursor, we don't use the pointers */
cursordata.aspcur = NULL;
cursordata.aicur = NULL;
cursordata.ajifRate = NULL;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
SetLastNtError(_SEH2_GetExceptionCode());
goto Exit;
}
_SEH2_END
/* Check if we got a module name */
if (pustrModule != NULL)
{
/* Capture the name */
status = ProbeAndCaptureUnicodeString(&ustrModule, UserMode, pustrModule);
if (!NT_SUCCESS(status))
{
ERR("Failed to copy pustrModule: status 0x%08lx\n", status);
goto Exit;
}
}
/* Check if we got a resource name */
if (pustrRsrc != NULL)
{
/* We use this function, because INTRESOURCEs and ATOMs are the same */
status = ProbeAndCaptureUnicodeStringOrAtom(&ustrRsrc, pustrRsrc);
if (!NT_SUCCESS(status))
{
ERR("Failed to copy pustrRsrc: status 0x%08lx\n", status);
goto Exit;
}
}
/* Make sure the caller doesn't give us invalid flags */
if (cursordata.CURSORF_flags & ~CURSORF_USER_MASK)
{
ERR("Invalid cursor flags: 0x%08lx\n", cursordata.CURSORF_flags);
goto Exit;
}
/* Acquire the global user lock */
UserEnterExclusive();
/* Call the internal function */
bResult = UserSetCursorIconData(hcursor,
pustrModule ? &ustrModule : NULL,
pustrRsrc ? &ustrRsrc : NULL,
&cursordata);
/* Release the global user lock */
UserLeave();
Exit:
/* Free the captured module name */
if ((ustrModule.Buffer != NULL) && !IS_INTRESOURCE(ustrModule.Buffer))
{
ReleaseCapturedUnicodeString(&ustrModule, UserMode);
}
if (pvBuffer != NULL)
{
ExFreePoolWithTag(pvBuffer, USERTAG_CURSOR);
}
/* Additional cleanup on failure */
if (bResult == FALSE)
{
if ((ustrRsrc.Buffer != NULL) &&
!IS_INTRESOURCE(ustrRsrc.Buffer))
{
ExFreePoolWithTag(ustrRsrc.Buffer, TAG_STRING);
}
}
TRACE("Leave NtUserSetCursorIconData, bResult = %i\n", bResult);
return bResult;
}
/* Mostly inspired from wine code.
* We use low level functions because:
* - at this point, the icon bitmap could have a different bit depth than the DC,
* making it thus impossible to use NtCreateCompatibleDC and selecting the bitmap.
* This happens after a mode setting change.
* - it avoids massive GDI objects locking when only the destination surface needs it.
* - It makes (small) performance gains.
*/
BOOL
UserDrawIconEx(
HDC hDc,
INT xLeft,
INT yTop,
PCURICON_OBJECT pIcon,
INT cxWidth,
INT cyHeight,
UINT istepIfAniCur,
HBRUSH hbrFlickerFreeDraw,
UINT diFlags)
{
PSURFACE psurfDest, psurfMask, psurfColor; //, psurfOffScreen = NULL;
PDC pdc = NULL;
BOOL Ret = FALSE;
HBITMAP hbmMask, hbmColor, hbmAlpha;
BOOL bOffScreen;
RECTL rcDest, rcSrc;
CLIPOBJ* pdcClipObj = NULL;
EXLATEOBJ exlo;
/* Stupid case */
if ((diFlags & DI_NORMAL) == 0)
{
ERR("DrawIconEx called without mask or color bitmap to draw.\n");
return FALSE;
}
if (pIcon->CURSORF_flags & CURSORF_ACON)
{
ACON* pAcon = (ACON*)pIcon;
if (istepIfAniCur >= pAcon->cicur)
{
ERR("NtUserDrawIconEx: istepIfAniCur too big!\n");
return FALSE;
}
pIcon = pAcon->aspcur[pAcon->aicur[istepIfAniCur]];
}
hbmMask = pIcon->hbmMask;
hbmColor = pIcon->hbmColor;
hbmAlpha = pIcon->hbmAlpha;
/*
* Get our objects.
* Shared locks are enough, we are only reading those bitmaps
*/
psurfMask = SURFACE_ShareLockSurface(hbmMask);
if (psurfMask == NULL)
{
ERR("Unable to lock the mask surface.\n");
return FALSE;
}
/* Color bitmap is not mandatory */
if (hbmColor == NULL)
{
/* But then the mask bitmap must have the information in it's bottom half */
ASSERT(psurfMask->SurfObj.sizlBitmap.cy == 2*pIcon->cy);
psurfColor = NULL;
}
else if ((psurfColor = SURFACE_ShareLockSurface(hbmColor)) == NULL)
{
ERR("Unable to lock the color bitmap.\n");
SURFACE_ShareUnlockSurface(psurfMask);
return FALSE;
}
pdc = DC_LockDc(hDc);
if (!pdc)
{
ERR("Could not lock the destination DC.\n");
SURFACE_ShareUnlockSurface(psurfMask);
if (psurfColor) SURFACE_ShareUnlockSurface(psurfColor);
return FALSE;
}
/* Fix width parameter, if needed */
if (!cxWidth)
{
if (diFlags & DI_DEFAULTSIZE)
cxWidth = is_icon(pIcon) ?
UserGetSystemMetrics(SM_CXICON) : UserGetSystemMetrics(SM_CXCURSOR);
else
cxWidth = pIcon->cx;
}
/* Fix height parameter, if needed */
if (!cyHeight)
{
if (diFlags & DI_DEFAULTSIZE)
cyHeight = is_icon(pIcon) ?
UserGetSystemMetrics(SM_CYICON) : UserGetSystemMetrics(SM_CYCURSOR);
else
cyHeight = pIcon->cy;
}
/* Calculate destination rectangle */
RECTL_vSetRect(&rcDest, xLeft, yTop, xLeft + cxWidth, yTop + cyHeight);
IntLPtoDP(pdc, (LPPOINT)&rcDest, 2);
RECTL_vOffsetRect(&rcDest, pdc->ptlDCOrig.x, pdc->ptlDCOrig.y);
/* Prepare the underlying surface */
DC_vPrepareDCsForBlit(pdc, &rcDest, NULL, NULL);
/* We now have our destination surface and rectangle */
psurfDest = pdc->dclevel.pSurface;
if (psurfDest == NULL)
{
/* Empty DC */
DC_vFinishBlit(pdc, NULL);
DC_UnlockDc(pdc);
SURFACE_ShareUnlockSurface(psurfMask);
if (psurfColor) SURFACE_ShareUnlockSurface(psurfColor);
return FALSE;
}
/* Set source rect */
RECTL_vSetRect(&rcSrc, 0, 0, pIcon->cx, pIcon->cy);
/* Should we render off-screen? */
bOffScreen = hbrFlickerFreeDraw &&
(GDI_HANDLE_GET_TYPE(hbrFlickerFreeDraw) == GDI_OBJECT_TYPE_BRUSH);
if (bOffScreen)
{
/* Yes: Allocate and paint the offscreen surface */
EBRUSHOBJ eboFill;
PBRUSH pbrush = BRUSH_ShareLockBrush(hbrFlickerFreeDraw);
TRACE("Performing off-screen rendering.\n");
if (!pbrush)
{
ERR("Failed to get brush object.\n");
goto Cleanup;
}
#if 0 //We lock the hdc surface during the whole function it makes no sense to use an offscreen surface for "flicker free" drawing
psurfOffScreen = SURFACE_AllocSurface(STYPE_BITMAP,
cxWidth, cyHeight, psurfDest->SurfObj.iBitmapFormat,
0, 0, NULL);
if (!psurfOffScreen)
{
ERR("Failed to allocate the off-screen surface.\n");
BRUSH_ShareUnlockBrush(pbrush);
goto Cleanup;
}
/* Paint the brush */
EBRUSHOBJ_vInit(&eboFill, pbrush, psurfOffScreen, 0x00FFFFFF, 0, NULL);
RECTL_vSetRect(&rcDest, 0, 0, cxWidth, cyHeight);
Ret = IntEngBitBlt(&psurfOffScreen->SurfObj,
NULL,
NULL,
NULL,
NULL,
&rcDest,
NULL,
NULL,
&eboFill.BrushObject,
&pbrush->ptOrigin,
ROP4_PATCOPY);
/* Clean up everything */
EBRUSHOBJ_vCleanup(&eboFill);
BRUSH_ShareUnlockBrush(pbrush);
if (!Ret)
{
ERR("Failed to paint the off-screen surface.\n");
goto Cleanup;
}
/* We now have our destination surface */
psurfDest = psurfOffScreen;
#else
pdcClipObj = (CLIPOBJ *)&pdc->co;
/* Paint the brush */
EBRUSHOBJ_vInit(&eboFill, pbrush, psurfDest, 0x00FFFFFF, 0, NULL);
Ret = IntEngBitBlt(&psurfDest->SurfObj,
NULL,
NULL,
pdcClipObj,
NULL,
&rcDest,
NULL,
NULL,
&eboFill.BrushObject,
&pbrush->ptOrigin,
ROP4_PATCOPY);
/* Clean up everything */
EBRUSHOBJ_vCleanup(&eboFill);
BRUSH_ShareUnlockBrush(pbrush);
if (!Ret)
{
ERR("Failed to paint the off-screen surface.\n");
goto Cleanup;
}
#endif
}
else
{
/* We directly draw to the DC */
TRACE("Performing on screen rendering.\n");
pdcClipObj = (CLIPOBJ *)&pdc->co;
// psurfOffScreen = NULL;
}
/* Now do the rendering */
if (hbmAlpha && ((diFlags & DI_NORMAL) == DI_NORMAL))
{
BLENDOBJ blendobj = { {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA } };
PSURFACE psurf = NULL;
psurf = SURFACE_ShareLockSurface(hbmAlpha);
if (!psurf)
{
ERR("SURFACE_LockSurface failed!\n");
goto NoAlpha;
}
/* Initialize color translation object */
EXLATEOBJ_vInitialize(&exlo, psurf->ppal, psurfDest->ppal, 0xFFFFFFFF, 0xFFFFFFFF, 0);
/* Now do it */
Ret = IntEngAlphaBlend(&psurfDest->SurfObj,
&psurf->SurfObj,
pdcClipObj,
&exlo.xlo,
&rcDest,
&rcSrc,
&blendobj);
EXLATEOBJ_vCleanup(&exlo);
SURFACE_ShareUnlockSurface(psurf);
if (Ret) goto done;
ERR("NtGdiAlphaBlend failed!\n");
}
NoAlpha:
if (diFlags & DI_MASK)
{
DWORD rop4 = (diFlags & DI_IMAGE) ? ROP4_SRCAND : ROP4_SRCCOPY;
EXLATEOBJ_vInitSrcMonoXlate(&exlo, psurfDest->ppal, 0x00FFFFFF, 0);
Ret = IntEngStretchBlt(&psurfDest->SurfObj,
&psurfMask->SurfObj,
NULL,
pdcClipObj,
&exlo.xlo,
NULL,
&rcDest,
&rcSrc,
NULL,
NULL,
NULL,
rop4);
EXLATEOBJ_vCleanup(&exlo);
if (!Ret)
{
ERR("Failed to mask the bitmap data.\n");
goto Cleanup;
}
}
if (diFlags & DI_IMAGE)
{
if (psurfColor)
{
DWORD rop4 = (diFlags & DI_MASK) ? ROP4_SRCINVERT : ROP4_SRCCOPY ;
EXLATEOBJ_vInitialize(&exlo, psurfColor->ppal, psurfDest->ppal, 0x00FFFFFF, 0x00FFFFFF, 0);
Ret = IntEngStretchBlt(&psurfDest->SurfObj,
&psurfColor->SurfObj,
NULL,
pdcClipObj,
&exlo.xlo,
NULL,
&rcDest,
&rcSrc,
NULL,
NULL,
NULL,
rop4);
EXLATEOBJ_vCleanup(&exlo);
if (!Ret)
{
ERR("Failed to render the icon bitmap.\n");
goto Cleanup;
}
}
else
{
/* Mask bitmap holds the information in its bottom half */
DWORD rop4 = (diFlags & DI_MASK) ? ROP4_SRCINVERT : ROP4_SRCCOPY;
RECTL_vOffsetRect(&rcSrc, 0, pIcon->cy);
EXLATEOBJ_vInitSrcMonoXlate(&exlo, psurfDest->ppal, 0x00FFFFFF, 0);
Ret = IntEngStretchBlt(&psurfDest->SurfObj,
&psurfMask->SurfObj,
NULL,
pdcClipObj,
&exlo.xlo,
NULL,
&rcDest,
&rcSrc,
NULL,
NULL,
NULL,
rop4);
EXLATEOBJ_vCleanup(&exlo);
if (!Ret)
{
ERR("Failed to render the icon bitmap.\n");
goto Cleanup;
}
}
}
done:
#if 0
/* We're done. Was it a double buffered draw ? */
if (bOffScreen)
{
/* Yes. Draw it back to our DC */
POINTL ptSrc = {0, 0};
/* Calculate destination rectangle */
RECTL_vSetRect(&rcDest, xLeft, yTop, xLeft + cxWidth, yTop + cyHeight);
IntLPtoDP(pdc, (LPPOINT)&rcDest, 2);
RECTL_vOffsetRect(&rcDest, pdc->ptlDCOrig.x, pdc->ptlDCOrig.y);
/* Get the clip object */
pdcClipObj = pdc->rosdc.CombinedClip;
/* We now have our destination surface and rectangle */
psurfDest = pdc->dclevel.pSurface;
/* Color translation */
EXLATEOBJ_vInitialize(&exlo, psurfOffScreen->ppal, psurfDest->ppal, 0x00FFFFFF, 0x00FFFFFF, 0);
/* Blt it! */
Ret = IntEngBitBlt(&psurfDest->SurfObj,
&psurfOffScreen->SurfObj,
NULL,
pdcClipObj,
&exlo.xlo,
&rcDest,
&ptSrc,
NULL,
NULL,
NULL,
ROP4_SRCCOPY);
EXLATEOBJ_vCleanup(&exlo);
}
#endif
Cleanup:
if (pdc)
{
DC_vFinishBlit(pdc, NULL);
DC_UnlockDc(pdc);
}
#if 0
/* Delete off screen rendering surface */
if (psurfOffScreen)
GDIOBJ_vDeleteObject(&psurfOffScreen->BaseObject);
#endif
/* Unlock other surfaces */
SURFACE_ShareUnlockSurface(psurfMask);
if (psurfColor) SURFACE_ShareUnlockSurface(psurfColor);
return Ret;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserDrawIconEx(
HDC hdc,
int xLeft,
int yTop,
HICON hIcon,
int cxWidth,
int cyHeight,
UINT istepIfAniCur,
HBRUSH hbrFlickerFreeDraw,
UINT diFlags,
BOOL bMetaHDC, // When TRUE, GDI functions need to be handled in User32!
PVOID pDIXData)
{
PCURICON_OBJECT pIcon;
BOOL Ret;
TRACE("Enter NtUserDrawIconEx\n");
UserEnterExclusive();
if (!(pIcon = UserGetCurIconObject(hIcon)))
{
ERR("UserGetCurIconObject(0x%p) failed!\n", hIcon);
UserLeave();
return FALSE;
}
Ret = UserDrawIconEx(hdc,
xLeft,
yTop,
pIcon,
cxWidth,
cyHeight,
istepIfAniCur,
hbrFlickerFreeDraw,
diFlags);
UserDereferenceObject(pIcon);
UserLeave();
return Ret;
}
/*
* @unimplemented
*/
HCURSOR
NTAPI
NtUserGetCursorFrameInfo(
HCURSOR hCursor,
DWORD istep,
INT* rate_jiffies,
DWORD* num_steps)
{
PCURICON_OBJECT CurIcon;
HCURSOR ret;
INT jiffies = 0;
DWORD steps = 1;
NTSTATUS Status = STATUS_SUCCESS;
TRACE("Enter NtUserGetCursorFrameInfo\n");
UserEnterShared();
if (!(CurIcon = UserGetCurIconObject(hCursor)))
{
UserLeave();
return NULL;
}
ret = UserHMGetHandle(CurIcon);
if (CurIcon->CURSORF_flags & CURSORF_ACON)
{
PACON AniCurIcon = (PACON)CurIcon;
if (istep >= AniCurIcon->cicur)
{
UserDereferenceObject(CurIcon);
UserLeave();
return NULL;
}
jiffies = AniCurIcon->ajifRate[istep];
steps = AniCurIcon->cicur;
ret = UserHMGetHandle(AniCurIcon->aspcur[AniCurIcon->aicur[istep]]);
}
_SEH2_TRY
{
ProbeForWrite(rate_jiffies, sizeof(INT), 1);
ProbeForWrite(num_steps, sizeof(DWORD), 1);
*rate_jiffies = jiffies;
*num_steps = steps;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
}
_SEH2_END
if (!NT_SUCCESS(Status))
{
WARN("Status: 0x%08lx\n", Status);
SetLastNtError(Status);
ret = NULL;
}
UserDereferenceObject(CurIcon);
UserLeave();
TRACE("Leaving NtUserGetCursorFrameInfo, ret = 0x%p\n", ret);
return ret;
}
/*
* @implemented
*/
BOOL
APIENTRY
NtUserSetSystemCursor(
HCURSOR hcur,
DWORD id)
{
PCURICON_OBJECT pcur, pcurOrig = NULL;
int i;
PPROCESSINFO ppi;
BOOL Ret = FALSE;
UserEnterExclusive();
if (!CheckWinstaAttributeAccess(WINSTA_WRITEATTRIBUTES))
{
goto Exit;
}
if (hcur)
{
pcur = UserGetCurIconObject(hcur);
if (!pcur)
{
EngSetLastError(ERROR_INVALID_CURSOR_HANDLE);
goto Exit;
}
ppi = PsGetCurrentProcessWin32Process();
for (i = 0 ; i < 16; i++)
{
if (gasyscur[i].type == id)
{
pcurOrig = gasyscur[i].handle;
if (pcurOrig) break;
if (ppi->W32PF_flags & W32PF_CREATEDWINORDC)
{
gasyscur[i].handle = pcur;
pcur->CURSORF_flags |= CURSORF_GLOBAL;
pcur->head.ppi = NULL;
IntInsertCursorIntoList(pcur);
Ret = TRUE;
}
break;
}
}
if (pcurOrig)
{
FIXME("Need to copy cursor data or do something! pcurOrig %p new pcur %p\n",pcurOrig,pcur);
}
}
Exit:
UserLeave();
return Ret;
}
/* EOF */
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