[greatlrd] 30399: fix Mesa ICD DrvSetFormatPixel, do not create stack cruption by ignore the 3 param. copy code from fxgl interface and make DrvSetFormatPixel work

Author: greatlrd
Date: Mon Nov 12 21:39:47 2007
New Revision: 30399

URL: http://svn.reactos.org/svn/reactos?rev=30399&view=rev
Log:
fix Mesa ICD DrvSetFormatPixel, do not create stack cruption by ignore the 3 param.
copy code from fxgl interface and make DrvSetFormatPixel work

Modified:
    trunk/reactos/dll/3rdparty/mesa32/src/drivers/windows/icd/icd.c

Modified: trunk/reactos/dll/3rdparty/mesa32/src/drivers/windows/icd/icd.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/3rdparty/mesa32/src/dr…
==============================================================================
--- trunk/reactos/dll/3rdparty/mesa32/src/drivers/windows/icd/icd.c (original)
+++ trunk/reactos/dll/3rdparty/mesa32/src/drivers/windows/icd/icd.c Mon Nov 12 21:39:47
2007
@@ -283,19 +283,23 @@
 WGLAPI int GLAPIENTRY DrvDescribePixelFormat(HDC hdc,int iPixelFormat,UINT nBytes,
                                     LPPIXELFORMATDESCRIPTOR ppfd)
 {
-    int	qt_valid_pix;
-    (void) hdc;
-
-    qt_valid_pix = qt_pix;
+   int qt_valid_pix;
+
+   qt_valid_pix = qt_pix;
+
     if(ppfd == NULL)
-	return(qt_valid_pix);
-    if(iPixelFormat < 1 || iPixelFormat > qt_valid_pix || nBytes !=
sizeof(PIXELFORMATDESCRIPTOR))
-    {
-        SetLastError(0);
-        return(0);
-    }
-    *ppfd = pix[iPixelFormat - 1].pfd;
-    return(qt_valid_pix);
+        return(qt_valid_pix);
+
+   if (iPixelFormat < 1 || iPixelFormat > qt_valid_pix ||
+       ((nBytes != sizeof(PIXELFORMATDESCRIPTOR)) && (nBytes != 0))) {
+      SetLastError(0);
+      return qt_valid_pix;
+   }
+
+   if (nBytes != 0)
+      *ppfd = pix[iPixelFormat - 1].pfd;
+
+   return qt_valid_pix;
 }
 
 /*
@@ -311,19 +315,27 @@
    return(NULL);
 }
 
-WGLAPI BOOL GLAPIENTRY DrvSetPixelFormat(HDC hdc,int iPixelFormat)
-{
-    int qt_valid_pix;
-    (void) hdc;
-
-    qt_valid_pix = qt_pix;
-    if(iPixelFormat < 1 || iPixelFormat > qt_valid_pix)
-    {
-        SetLastError(0);
-        return(FALSE);
-    }
-    curPFD = iPixelFormat;
-    return(TRUE);
+WGLAPI BOOL GLAPIENTRY DrvSetPixelFormat(HDC hdc,int iPixelFormat, const
PIXELFORMATDESCRIPTOR *ppfd)
+{
+   int qt_valid_pix;
+
+   qt_valid_pix = qt_pix;
+
+   if (iPixelFormat < 1 || iPixelFormat > qt_valid_pix) {
+      if (ppfd == NULL) {
+         PIXELFORMATDESCRIPTOR my_pfd;
+         if (!DrvDescribePixelFormat(hdc, iPixelFormat, sizeof(PIXELFORMATDESCRIPTOR),
&my_pfd)) {
+            SetLastError(0);
+            return FALSE;
+         }
+      } else if (ppfd->nSize != sizeof(PIXELFORMATDESCRIPTOR)) {
+         SetLastError(0);
+         return FALSE;
+      }
+   }
+   curPFD = iPixelFormat;
+
+   return TRUE;
 }
 
 WGLAPI BOOL GLAPIENTRY DrvSwapBuffers(HDC hdc)