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gdi32: Support NULL prev_value in NtGdiGetAndSetDCDword.

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Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-09-09 14:01:47 +02:00 committed by Alexandre Julliard
parent 03ec246e52
commit bf4cdfad5b
1 changed files with 10 additions and 7 deletions
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17
dlls/gdi32/dc.c
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@ -830,6 +830,7 @@ BOOL WINAPI NtGdiGetAndSetDCDword( HDC hdc, UINT method, DWORD value, DWORD *pre
{
PHYSDEV physdev;
BOOL ret = TRUE;
DWORD prev;
DC *dc;
if (!(dc = get_dc_ptr( hdc ))) return 0;
@ -837,36 +838,36 @@ BOOL WINAPI NtGdiGetAndSetDCDword( HDC hdc, UINT method, DWORD value, DWORD *pre
switch (method)
{
case NtGdiSetMapMode:
*prev_value = dc->attr->map_mode;
prev = dc->attr->map_mode;
ret = set_map_mode( dc, value );
break;
case NtGdiSetBkColor:
*prev_value = dc->attr->background_color;
prev = dc->attr->background_color;
set_bk_color( dc, value );
break;
case NtGdiSetTextColor:
*prev_value = dc->attr->text_color;
prev = dc->attr->text_color;
set_text_color( dc, value );
break;
case NtGdiSetDCBrushColor:
physdev = GET_DC_PHYSDEV( dc, pSetDCBrushColor );
*prev_value = dc->attr->brush_color;
prev = dc->attr->brush_color;
value = physdev->funcs->pSetDCBrushColor( physdev, value );
if (value != CLR_INVALID) dc->attr->brush_color = value;
break;
case NtGdiSetDCPenColor:
physdev = GET_DC_PHYSDEV( dc, pSetDCPenColor );
*prev_value = dc->attr->pen_color;
prev = dc->attr->pen_color;
value = physdev->funcs->pSetDCPenColor( physdev, value );
if (value != CLR_INVALID) dc->attr->pen_color = value;
break;
case NtGdiSetGraphicsMode:
if (prev_value) *prev_value = dc->attr->graphics_mode;
prev = dc->attr->graphics_mode;
ret = set_graphics_mode( dc, value );
break;
@ -877,7 +878,9 @@ BOOL WINAPI NtGdiGetAndSetDCDword( HDC hdc, UINT method, DWORD value, DWORD *pre
}
release_dc_ptr( dc );
return ret;
if (!ret || !prev_value) return FALSE;
*prev_value = prev;
return TRUE;
}