ReactOS 0.4.15-dev-5666-gc548b97
gditools.c File Reference
#include <windef.h>
#include <winbase.h>
#include <wingdi.h>
#include <winddi.h>
#include <prntfont.h>
#include <ndk/ntndk.h>
#include <ntgdityp.h>
#include <ntgdi.h>
#include <ntgdihdl.h>
Include dependency graph for gditools.c:

Go to the source code of this file.

Macros

#define WIN32_NO_STATUS
 
#define NTOS_MODE_USER
 

Functions

PENTRY GdiQueryTable (VOID)
 
BOOL GdiIsHandleValid (_In_ HGDIOBJ hobj)
 
BOOL GdiIsHandleValidEx (_In_ HGDIOBJ hobj, _In_ GDILOOBJTYPE ObjectType)
 
PVOID GdiGetHandleUserData (_In_ HGDIOBJ hobj)
 

Macro Definition Documentation

◆ NTOS_MODE_USER

#define NTOS_MODE_USER

Definition at line 11 of file gditools.c.

◆ WIN32_NO_STATUS

#define WIN32_NO_STATUS

Definition at line 4 of file gditools.c.

Function Documentation

◆ GdiGetHandleUserData()

PVOID GdiGetHandleUserData ( _In_ HGDIOBJ  hobj)

Definition at line 68 of file gditools.c.

70{
71 PENTRY pentHmgr = GdiQueryTable();
72 USHORT Index = (ULONG_PTR)hobj;
73 PENTRY pentry = &pentHmgr[Index];
74
75 if (!GdiIsHandleValid(hobj))
76 {
77 return NULL;
78 }
79
80 return pentry->pUser;
81}
#define NULL
Definition: types.h:112
#define ULONG_PTR
Definition: config.h:101
PENTRY GdiQueryTable(VOID)
Definition: gditools.c:20
BOOL GdiIsHandleValid(_In_ HGDIOBJ hobj)
Definition: gditools.c:29
unsigned short USHORT
Definition: pedump.c:61
Definition: ntgdihdl.h:218
PVOID pUser
Definition: ntgdihdl.h:238
_In_ WDFCOLLECTION _In_ ULONG Index

Referenced by CancelDC(), CreateCompatibleBitmap(), CreateCompatibleDC(), CreatePen(), GdiDeleteBrushOrPen(), GetBrushOrgEx(), GetColorSpace(), IntCreateDICW(), SetBrushOrgEx(), SetDIBitsToDevice(), START_TEST(), and StretchDIBits().

◆ GdiIsHandleValid()

BOOL GdiIsHandleValid ( _In_ HGDIOBJ  hobj)

Definition at line 29 of file gditools.c.

31{
32 PENTRY pentHmgr = GdiQueryTable();
33 USHORT Index = (ULONG_PTR)hobj & 0xFFFF;
34 PENTRY pentry = &pentHmgr[Index];
35
36 if ((pentry->einfo.pobj == NULL) ||
37 ((LONG_PTR)pentry->einfo.pobj > 0) ||
38 (pentry->FullUnique != (USHORT)((ULONG_PTR)hobj >> 16)))
39 {
40 return FALSE;
41 }
42
43 return TRUE;
44}
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
union _ENTRY::_EINFO einfo
USHORT FullUnique
Definition: ntgdihdl.h:235
#define LONG_PTR
Definition: treelist.c:79
uint32_t ULONG_PTR
Definition: typedefs.h:65
struct _BASEOBJECT * pobj
Definition: ntgdihdl.h:221

Referenced by GdiGetHandleUserData(), and START_TEST().

◆ GdiIsHandleValidEx()

BOOL GdiIsHandleValidEx ( _In_ HGDIOBJ  hobj,
_In_ GDILOOBJTYPE  ObjectType 
)

Definition at line 47 of file gditools.c.

50{
51 PENTRY pentHmgr = GdiQueryTable();
52 USHORT Index = (ULONG_PTR)hobj & 0xFFFF;
53 PENTRY pentry = &pentHmgr[Index];
54
55 if ((pentry->einfo.pobj == NULL) ||
56 ((LONG_PTR)pentry->einfo.pobj > 0) ||
57 (pentry->FullUnique != (USHORT)((ULONG_PTR)hobj >> 16)) ||
58 (pentry->Objt != (UCHAR)(ObjectType >> 16)) ||
59 (pentry->Flags != (UCHAR)(ObjectType >> 24)))
60 {
61 return FALSE;
62 }
63
64 return TRUE;
65}
ObjectType
Definition: metafile.c:81
UCHAR Objt
Definition: ntgdihdl.h:236
UCHAR Flags
Definition: ntgdihdl.h:237
unsigned char UCHAR
Definition: xmlstorage.h:181

◆ GdiQueryTable()

PENTRY GdiQueryTable ( VOID  )

Definition at line 20 of file gditools.c.

22{
23 PTEB pTeb = NtCurrentTeb();
24 PPEB pPeb = pTeb->ProcessEnvironmentBlock;
25 return pPeb->GdiSharedHandleTable;
26}
#define NtCurrentTeb
PVOID GdiSharedHandleTable
Definition: ntddk_ex.h:292
Definition: compat.h:836
PPEB ProcessEnvironmentBlock
Definition: ntddk_ex.h:337

Referenced by GdiGetHandleUserData(), GdiIsHandleValid(), and GdiIsHandleValidEx().