Author: jimtabor
Date: Sun Nov 27 12:47:43 2011
New Revision: 54508
URL: http://svn.reactos.org/svn/reactos?rev=54508&view=rev
Log:
[Win32k]
- Create Monitor from rect. This will be used for window placement support.
Modified:
trunk/reactos/subsystems/win32/win32k/include/monitor.h
trunk/reactos/subsystems/win32/win32k/ntuser/monitor.c
Modified: trunk/reactos/subsystems/win32/win32k/include/monitor.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/include/monitor.h?rev=54508&r1=54507&r2=54508&view=diff
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/include/monitor.h [iso-8859-1]
(original)
+++ trunk/reactos/subsystems/win32/win32k/include/monitor.h [iso-8859-1] Sun
Nov 27 12:47:43 2011
@@ -33,5 +33,6 @@
NTSTATUS IntUpdateMonitorSize(IN PDEVOBJ *pGdiDevice);
PMONITOR FASTCALL UserGetMonitorObject(IN HMONITOR);
PMONITOR FASTCALL IntGetPrimaryMonitor(VOID);
+PMONITOR FASTCALL IntMonitorFromRect(PRECTL,DWORD);
/* EOF */
Modified: trunk/reactos/subsystems/win32/win32k/ntuser/monitor.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntuser/monitor.c?rev=54508&r1=54507&r2=54508&view=diff
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/monitor.c [iso-8859-1]
(original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/monitor.c [iso-8859-1] Sun Nov
27 12:47:43 2011
@@ -402,6 +402,83 @@
return cMonitors;
}
+
+PMONITOR
+FASTCALL
+IntMonitorFromRect(
+ PRECTL pRect,
+ DWORD dwFlags)
+{
+ ULONG cMonitors, LargestArea = 0, i;
+ PRECTL prcMonitorList = NULL;
+ HMONITOR *phMonitorList = NULL;
+ HMONITOR hMonitor = NULL;
+
+ /* Check if flags are valid */
+ if (dwFlags != MONITOR_DEFAULTTONULL &&
+ dwFlags != MONITOR_DEFAULTTOPRIMARY &&
+ dwFlags != MONITOR_DEFAULTTONEAREST)
+ {
+ EngSetLastError(ERROR_INVALID_FLAGS);
+ return NULL;
+ }
+
+ /* Find intersecting monitors */
+ cMonitors = IntGetMonitorsFromRect(pRect, &hMonitor, NULL, 1, dwFlags);
+ if (cMonitors <= 1)
+ {
+ /* No or one monitor found. Just return handle. */
+ goto cleanup;
+ }
+
+ /* There is more than one monitor. Find monitor with largest intersection.
+ Temporary reset hMonitor */
+ hMonitor = NULL;
+
+ /* Allocate helper buffers */
+ phMonitorList = ExAllocatePoolWithTag(PagedPool,
+ sizeof(HMONITOR) * cMonitors,
+ USERTAG_MONITORRECTS);
+ if (phMonitorList == NULL)
+ {
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ goto cleanup;
+ }
+
+ prcMonitorList = ExAllocatePoolWithTag(PagedPool,
+ sizeof(RECT) * cMonitors,
+ USERTAG_MONITORRECTS);
+ if (prcMonitorList == NULL)
+ {
+ EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ goto cleanup;
+ }
+
+ /* Get intersecting monitors again but now with rectangle list */
+ cMonitors = IntGetMonitorsFromRect(pRect, phMonitorList, prcMonitorList,
+ cMonitors, 0);
+
+ /* Find largest intersection */
+ for (i = 0; i < cMonitors; i++)
+ {
+ ULONG Area = (prcMonitorList[i].right - prcMonitorList[i].left) *
+ (prcMonitorList[i].bottom - prcMonitorList[i].top);
+ if (Area >= LargestArea)
+ {
+ hMonitor = phMonitorList[i];
+ LargestArea = Area;
+ }
+ }
+
+cleanup:
+ if (phMonitorList)
+ ExFreePoolWithTag(phMonitorList, USERTAG_MONITORRECTS);
+ if (prcMonitorList)
+ ExFreePoolWithTag(prcMonitorList, USERTAG_MONITORRECTS);
+
+ return UserGetMonitorObject(hMonitor);
+}
+
/* PUBLIC FUNCTIONS
***********************************************************/
