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[WIN32SS][NTDDRAW] Get complexity of visible region in DxEngGetDCState (#2604)

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CORE-7733

Get the complexity of visible region in the DxEngGetDCState() function, according to its remarks.
This implementation returns a number of rectangles that make up the region, similarly to as it done in REGION_Complexity() function:
https://git.reactos.org/?p=reactos.git;a=blob;f=win32ss/gdi/ntgdi/region.c;h=38bf3d377fa805e9db8768774c4fc473590252d0;hb=HEAD#l573 
It is required by MS ddraw.dll when calling win32k/dxg functions during launching DirectDraw test or any DirectX 1 - 7 apps/games.
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Oleg Dubinskiy 2020-05-01 16:57:11 +03:00 committed by GitHub
parent 8bd6b9b6c2
commit 855bf46399
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1 changed files with 4 additions and 2 deletions
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6
win32ss/reactx/ntddraw/dxeng.c
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@ -4,6 +4,7 @@
* FILE: win32ss/reactx/ntddraw/dxeng.c
* PURPOSE: Implementation of DxEng functions
* PROGRAMMERS: Magnus Olsen (magnus@greatlord.com)
* Oleg Dubinskiy (oleg.dubinskij2013@yandex.ua)
*/
#include <win32k.h>
@ -442,7 +443,7 @@ DxEngSetHdevData(HDEV hDev,
* Return one of the type values
*
* @remarks.
* We do not have type 2 implemented yet
* none
*
*--*/
DWORD_PTR
@ -463,7 +464,8 @@ DxEngGetDCState(HDC hDC,
retVal = (DWORD_PTR) pDC->fs & DC_FLAG_FULLSCREEN;
break;
case 2:
UNIMPLEMENTED;
/* Return the number of rectangles in the visible region. */
retVal = (DWORD_PTR) pDC->prgnRao ? pDC->prgnRao->rdh.nCount : pDC->prgnVis->rdh.nCount;
break;
case 3:
{