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adding NULL pointer check for ppdev, pHalInfo, pdwNumHeaps, pdwNumFourCCCodes

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fill in more info for DDHALINFO it is not complete yet.

svn path=/trunk/; revision=23134
This commit is contained in:
Magnus Olsen 2006-07-18 08:54:32 +00:00
parent 6cf95d5263
commit 380d90d8a1
1 changed files with 27 additions and 10 deletions
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37
reactos/drivers/video/displays/framebuf/ddenable.c
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@ -136,19 +136,41 @@ DrvGetDirectDrawInfo(
{
PPDEV ppdev = (PPDEV)dhpdev;
if (ppdev == NULL)
return FALSE;
/* check so pHalInfo, pdwNumHeaps, pdwNumFourCCCodes is not NULL
pdwFourCC and pvmList can be null
*/
if (pHalInfo == NULL)
return FALSE;
if (pdwNumHeaps == NULL)
return FALSE;
if (pdwNumFourCCCodes == NULL)
return FALSE;
/* rest some data */
*pdwNumFourCCCodes = 0;
*pdwNumHeaps = 0;
/*
check see if pvmList and pdwFourCC are second call
check see if pvmList and pdwFourCC are frist call
or frist. Secon call we fill in pHalInfo info
*/
if(!(pvmList && pdwFourCC))
{
{
RtlZeroMemory(pHalInfo, sizeof(DDHALINFO));
pHalInfo->dwSize = sizeof(DDHALINFO);
pHalInfo->ddCaps.dwCaps = DDCAPS_BLT | DDCAPS_BLTQUEUE | DDCAPS_BLTCOLORFILL | DDCAPS_READSCANLINE |
DDCAPS_BLTSTRETCH | DDCAPS_COLORKEY | DDCAPS_CANBLTSYSMEM;
pHalInfo->ddCaps.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_PRIMARYSURFACE | DDSCAPS_FLIP;
/* Calc how much memmory is left on the video cards memmory */
pHalInfo->ddCaps.dwVidMemTotal = (ppdev->MemHeight - ppdev->ScreenHeight) * ppdev->ScreenDelta;
@ -172,12 +194,7 @@ DrvGetDirectDrawInfo(
if ( ppdev->BitsPerPixel == 8 )
{
pHalInfo->vmiData.ddpfDisplay.dwFlags |= DDPF_PALETTEINDEXED8;
}
}
}
return TRUE;