From e7651266fd36f92d67f0226700553405668cc97e Mon Sep 17 00:00:00 2001
From: James Tabor <james.tabor@reactos.org>
Date: Sun, 24 May 2009 04:07:47 +0000
Subject: [PATCH] - Implement GdiConvertAndCheckDC and Abort callback support
 routine.

svn path=/trunk/; revision=41091
---
 reactos/dll/win32/gdi32/include/gdi32p.h  |  4 ++++
 reactos/dll/win32/gdi32/misc/misc.c       | 17 +++++++++++++++++
 reactos/dll/win32/gdi32/misc/stubs.c      | 19 +++++++++++++++----
 reactos/include/reactos/win32k/ntgdihdl.h |  1 +
 4 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/reactos/dll/win32/gdi32/include/gdi32p.h b/reactos/dll/win32/gdi32/include/gdi32p.h
index 723c5657ba2..4504db66d4a 100644
--- a/reactos/dll/win32/gdi32/include/gdi32p.h
+++ b/reactos/dll/win32/gdi32/include/gdi32p.h
@@ -31,6 +31,8 @@ typedef INT
 #define METAFILE_MEMORY 1
 #define METAFILE_DISK   2
 
+#define SAPCALLBACKDELAY 244
+
 /* MACRO ********************************************************************/
 
 #define ROP_USES_SOURCE(Rop)   (((Rop) << 2 ^ Rop) & 0xCC0000)
@@ -238,4 +240,6 @@ int
 WINAPI
 GdiGetBitmapBitsSize(BITMAPINFO *lpbmi);
 
+VOID GdiSAPCallback(PLDC pldc);
+
 /* EOF */
diff --git a/reactos/dll/win32/gdi32/misc/misc.c b/reactos/dll/win32/gdi32/misc/misc.c
index 3a3a5ef3541..81d0d07cb9c 100644
--- a/reactos/dll/win32/gdi32/misc/misc.c
+++ b/reactos/dll/win32/gdi32/misc/misc.c
@@ -164,6 +164,23 @@ PLDC GdiGetLDC(HDC hDC)
     return Dc_Attr->pvLDC;
 }
 
+VOID GdiSAPCallback(PLDC pldc)
+{
+    DWORD Time, NewTime = GetTickCount();
+
+    Time = NewTime - pldc->CallBackTick;
+
+    if ( Time < SAPCALLBACKDELAY) return;
+
+    pldc->CallBackTick = NewTime;
+
+    if ( pldc->pAbortProc(pldc->hDC, 0) )
+    {
+       CancelDC(pldc->hDC);
+       AbortDoc(pldc->hDC);
+    }
+}
+
 /*
  * @implemented
  */
diff --git a/reactos/dll/win32/gdi32/misc/stubs.c b/reactos/dll/win32/gdi32/misc/stubs.c
index 197a149a92a..8cabaa92367 100644
--- a/reactos/dll/win32/gdi32/misc/stubs.c
+++ b/reactos/dll/win32/gdi32/misc/stubs.c
@@ -1142,15 +1142,26 @@ GdiCleanCacheDC(HDC hdc)
 }
 
 /*
- * @unimplemented
+ * @implemented
  */
 HDC
 WINAPI
 GdiConvertAndCheckDC(HDC hdc)
 {
-	UNIMPLEMENTED;
-	SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
-	return 0;
+   PLDC pldc;
+   ULONG hType = GDI_HANDLE_GET_TYPE(hdc);
+   if (hType == GDILoObjType_LO_DC_TYPE || hType == GDILoObjType_LO_METADC16_TYPE)
+      return hdc;
+   pldc = GdiGetLDC(hdc);
+   if (pldc)
+   {
+      if (pldc->Flags & LDC_SAPCALLBACK) GdiSAPCallback(pldc);
+      if (pldc->Flags & LDC_KILL_DOCUMENT) return NULL;
+      if (pldc->Flags & LDC_STARTPAGE) StartPage(hdc);
+      return hdc;
+   }
+   SetLastError(ERROR_INVALID_HANDLE);
+   return NULL;   
 }
 
 /*
diff --git a/reactos/include/reactos/win32k/ntgdihdl.h b/reactos/include/reactos/win32k/ntgdihdl.h
index 9ca2ed6dbd3..32d9c8ca24c 100644
--- a/reactos/include/reactos/win32k/ntgdihdl.h
+++ b/reactos/include/reactos/win32k/ntgdihdl.h
@@ -178,6 +178,7 @@
 #define LDC_SAPCALLBACK   0x00000020
 #define LDC_INIT_DOCUMENT 0x00000040
 #define LDC_INIT_PAGE     0x00000080
+#define LDC_STARTPAGE     0x00000100
 #define LDC_PLAY_MFDC     0x00000800
 #define LDC_CLOCKWISE     0x00002000
 #define LDC_KILL_DOCUMENT 0x00010000