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Classes
struct	MYPAL

Functions
BOOL	GdiToolsInit (void)

PENTRY	GdiQueryTable (VOID)

BOOL	GdiIsHandleValid (_In_ HGDIOBJ hobj)

BOOL	GdiIsHandleValidEx (_In_ HGDIOBJ hobj, _In_ GDILOOBJTYPE ObjectType)

PVOID	GdiGetHandleUserData (_In_ HGDIOBJ hobj)

BOOL	ChangeScreenBpp (_In_ ULONG cBitsPixel, _Out_ PULONG pcOldBitsPixel)

Variables
HBITMAP	ghbmp1

HBITMAP	ghbmp1_InvCol

HBITMAP	ghbmp1_RB

HBITMAP	ghbmp4

HBITMAP	ghbmp8

HBITMAP	ghbmp16

HBITMAP	ghbmp24

HBITMAP	ghbmp32

HBITMAP	ghbmpDIB1

HBITMAP	ghbmpDIB1_InvCol

HBITMAP	ghbmpDIB1_RB

HBITMAP	ghbmpDIB4

HBITMAP	ghbmpDIB8

HBITMAP	ghbmpDIB16

HBITMAP	ghbmpDIB24

HBITMAP	ghbmpDIB32

HDC	ghdcDIB1

HDC	ghdcDIB1_InvCol

HDC	ghdcDIB1_RB

HDC	ghdcDIB4

HDC	ghdcDIB8

HDC	ghdcDIB16

HDC	ghdcDIB24

HDC	ghdcDIB32

PVOID	gpvDIB1

PVOID	gpvDIB1_InvCol

PVOID	gpvDIB1_RB

PVOID	gpvDIB4

PVOID	gpvDIB8

PVOID	gpvDIB16

PVOID	gpvDIB24

PVOID	gpvDIB32

HDC	ghdcInfo

PULONG	pulDIB4Bits

HPALETTE	ghpal

ULONG(*	gpDIB32 )[8][8]

MYPAL	gpal

Function Documentation

◆ ChangeScreenBpp()

BOOL ChangeScreenBpp	(	_In_ ULONG	cBitsPixel,
		_Out_ PULONG	pcOldBitsPixel
	)

Definition at line 110 of file gditools.c.

{
    DEVMODEW dm = { .dmSize = sizeof(dm) };
 
    if (!EnumDisplaySettingsW(NULL, ENUM_CURRENT_SETTINGS, &dm))
    {
        printf("EnumDisplaySettingsW failed\n");
        return FALSE;
    }
 
    *pcOldBitsPixel = dm.dmBitsPerPel;
 
    if (dm.dmBitsPerPel != cBitsPixel)
    {
        dm.dmBitsPerPel = cBitsPixel;
        if (ChangeDisplaySettingsExW(NULL, &dm, NULL, CDS_UPDATEREGISTRY | CDS_GLOBAL, NULL) != DISP_CHANGE_SUCCESSFUL)
        {
            printf("Failed to change display settings to %lu bpp. Current bpp: %u\n", cBitsPixel, *pcOldBitsPixel);
            return FALSE;
        }
    }
 
    return TRUE;
}

Referenced by START_TEST().

◆ GdiGetHandleUserData()

PVOID GdiGetHandleUserData ( _In_ HGDIOBJ hobj )

Definition at line 94 of file gditools.c.

{
    PENTRY pentHmgr = GdiQueryTable();
    USHORT Index = (ULONG_PTR)hobj;
    PENTRY pentry = &pentHmgr[Index];
 
    if (!GdiIsHandleValid(hobj))
    {
        return NULL;
    }
 
    return pentry->pUser;
}

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 55 of file gditools.c.

{
    PENTRY pentHmgr = GdiQueryTable();
    USHORT Index = (ULONG_PTR)hobj & 0xFFFF;
    PENTRY pentry = &pentHmgr[Index];
 
    if ((pentry->einfo.pobj == NULL) ||
        ((LONG_PTR)pentry->einfo.pobj > 0) ||
        (pentry->FullUnique != (USHORT)((ULONG_PTR)hobj >> 16)))
    {
        return FALSE;
    }
 
    return TRUE;
}

Referenced by GdiGetHandleUserData(), and START_TEST().

◆ GdiIsHandleValidEx()

BOOL GdiIsHandleValidEx	(	_In_ HGDIOBJ	hobj,
		_In_ GDILOOBJTYPE	ObjectType
	)

Definition at line 73 of file gditools.c.

{
    PENTRY pentHmgr = GdiQueryTable();
    USHORT Index = (ULONG_PTR)hobj & 0xFFFF;
    PENTRY pentry = &pentHmgr[Index];
 
    if ((pentry->einfo.pobj == NULL) ||
        ((LONG_PTR)pentry->einfo.pobj > 0) ||
        (pentry->FullUnique != (USHORT)((ULONG_PTR)hobj >> 16)) ||
        (pentry->Objt != (UCHAR)(ObjectType >> 16)) ||
        (pentry->Flags != (UCHAR)(ObjectType >> 24)))
    {
        return FALSE;
    }
 
    return TRUE;
}

◆ GdiQueryTable()

PENTRY GdiQueryTable ( VOID )

Definition at line 46 of file gditools.c.

{
    PTEB pTeb = NtCurrentTeb();
    PPEB pPeb = pTeb->ProcessEnvironmentBlock;
    return pPeb->GdiSharedHandleTable;
}

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

◆ GdiToolsInit()

BOOL GdiToolsInit ( void )

Definition at line 229 of file gditools.c.

{
    /* Initialize a logical palette */
    ghpal = CreatePalette((LOGPALETTE*)&gpal);
    if (!ghpal)
    {
        printf("failed to create a palette\n");
        return FALSE;
    }
 
    if (!InitPerBitDepth(1, 9, 9, &ghbmp1, &ghdcDIB1, &ghbmpDIB1, &gpvDIB1, 0) ||
        !InitPerBitDepth(1, 9, 9, NULL, &ghdcDIB1_InvCol, &ghbmpDIB1_InvCol, &gpvDIB1_InvCol, FL_INVERT_COLORS) ||
        !InitPerBitDepth(1, 9, 9, NULL, &ghdcDIB1_RB, &ghbmpDIB1_RB, &gpvDIB1_RB, FL_RED_BLUE) ||
        !InitPerBitDepth(4, 5, 5, &ghbmp4, &ghdcDIB4, &ghbmpDIB4, &gpvDIB4, 0) ||
        !InitPerBitDepth(8, 5, 5, &ghbmp8, &ghdcDIB8, &ghbmpDIB8, &gpvDIB8, 0) ||
        !InitPerBitDepth(16, 8, 8, &ghbmp16, &ghdcDIB16, &ghbmpDIB16, &gpvDIB16, 0) ||
        !InitPerBitDepth(24, 8, 8, &ghbmp24, &ghdcDIB24, &ghbmpDIB24, &gpvDIB24, 0) ||
        !InitPerBitDepth(32, 8, 8, &ghbmp32, &ghdcDIB32, &ghbmpDIB32, &gpvDIB32, 0))
    {
        printf("failed to create objects\n");
        return FALSE;
    }
 
    gpDIB32 = gpvDIB32;
 
    /* Create an Info-DC */
    ghdcInfo = CreateDCW(L"DISPLAY", NULL, NULL, NULL);
    if (!ghdcInfo)
    {
        printf("failed to create info DC\n");
        return FALSE;
    }
 
    return TRUE;
}

Referenced by START_TEST().

Variable Documentation

◆ ghbmp1

HBITMAP ghbmp1

extern

Definition at line 22 of file gditools.c.

Referenced by GdiToolsInit(), and START_TEST().

◆ ghbmp16

HBITMAP ghbmp16

Definition at line 4 of file gditools.h.

◆ ghbmp1_InvCol

HBITMAP ghbmp1_InvCol

Definition at line 4 of file gditools.h.

◆ ghbmp1_RB

HBITMAP ghbmp1_RB

Definition at line 4 of file gditools.h.

◆ ghbmp24

HBITMAP ghbmp24

Definition at line 4 of file gditools.h.

◆ ghbmp32

HBITMAP ghbmp32

Definition at line 4 of file gditools.h.

◆ ghbmp4

HBITMAP ghbmp4

Definition at line 4 of file gditools.h.

◆ ghbmp8

HBITMAP ghbmp8

Definition at line 4 of file gditools.h.

◆ ghbmpDIB1

HBITMAP ghbmpDIB1

extern

Definition at line 23 of file gditools.c.

Referenced by GdiToolsInit().

◆ ghbmpDIB16

HBITMAP ghbmpDIB16

Definition at line 5 of file gditools.h.

◆ ghbmpDIB1_InvCol

HBITMAP ghbmpDIB1_InvCol

Definition at line 5 of file gditools.h.

◆ ghbmpDIB1_RB

HBITMAP ghbmpDIB1_RB

Definition at line 5 of file gditools.h.

◆ ghbmpDIB24

HBITMAP ghbmpDIB24

Definition at line 5 of file gditools.h.

◆ ghbmpDIB32

HBITMAP ghbmpDIB32

Definition at line 5 of file gditools.h.

◆ ghbmpDIB4

HBITMAP ghbmpDIB4

Definition at line 5 of file gditools.h.

◆ ghbmpDIB8

HBITMAP ghbmpDIB8

Definition at line 5 of file gditools.h.

◆ ghdcDIB1

HDC ghdcDIB1

extern

Definition at line 24 of file gditools.c.

Referenced by GdiToolsInit(), START_TEST(), Test_NtGdiBitBlt_1BPP(), Test_NtGdiBitBlt_generic(), Test_NtGdiSetPixel_1Bpp(), and Test_PaintRgn().