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- Improved implementation of REGION_CreateFrameRgn that gives more correct results.

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svn path=/trunk/; revision=9923
This commit is contained in:
Filip Navara
2004-06-29 06:08:54 +00:00
parent e834678a62
commit c2f6de9e7b
1 changed files with 75 additions and 81 deletions
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reactos/subsys/win32k/objects/region.c
+75 -81
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@@ -113,7 +113,7 @@ SOFTWARE.
* the y-x-banding that's so nice to have...
*/
/* $Id: region.c,v 1.58 2004/06/28 21:03:08 navaraf Exp $ */
/* $Id: region.c,v 1.59 2004/06/29 06:08:54 navaraf Exp $ */
#include <w32k.h>
#include <win32k/float.h>
@@ -1736,96 +1736,90 @@ void FASTCALL REGION_UnionRectWithRegion(const RECT *rect, ROSRGNDATA *rgn)
REGION_UnionRegion(rgn, rgn, &region);
}
BOOL FASTCALL REGION_CreateFrameRgn(HRGN hDest, HRGN hSrc, INT x, INT y)
{
PROSRGNDATA srcObj, destObj;
PRECT rc;
INT dx, dy;
ULONG i;
PROSRGNDATA srcObj, destObj;
PRECT rc;
ULONG i;
if(!(srcObj = (PROSRGNDATA)RGNDATA_LockRgn(hSrc)))
{
return FALSE;
}
if(!REGION_NOT_EMPTY(srcObj))
{
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
if(!(destObj = (PROSRGNDATA)RGNDATA_LockRgn(hDest)))
{
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
if (!(srcObj = (PROSRGNDATA)RGNDATA_LockRgn(hSrc)))
{
return FALSE;
}
if (!REGION_NOT_EMPTY(srcObj))
{
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
if (!(destObj = (PROSRGNDATA)RGNDATA_LockRgn(hDest)))
{
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
EMPTY_REGION(destObj);
if(!REGION_CopyRegion(destObj, srcObj))
{
RGNDATA_UnlockRgn(hDest);
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
EMPTY_REGION(destObj);
if (!REGION_CopyRegion(destObj, srcObj))
{
RGNDATA_UnlockRgn(hDest);
RGNDATA_UnlockRgn(hSrc);
return FALSE;
}
/* left-top */
dx = x * 2;
dy = y * 2;
rc = (PRECT)srcObj->Buffer;
for(i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left += x;
rc->top += y;
rc->right += x;
rc->bottom += y;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* Original region moved to right */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left += x;
rc->right += x;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* right-top */
rc = (PRECT)srcObj->Buffer;
for(i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left -= dx;
rc->right -= dx;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* Original region moved to left */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left -= 2 * x;
rc->right -= 2 * x;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* right-bottom */
rc = (PRECT)srcObj->Buffer;
for(i = 0; i < srcObj->rdh.nCount; i++)
{
rc->top -= dy;
rc->bottom -= dy;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* Original region moved down */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left += x;
rc->right += x;
rc->top += y;
rc->bottom += y;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* left-bottom */
rc = (PRECT)srcObj->Buffer;
for(i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left += dx;
rc->right += dx;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* Original region moved up */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
{
rc->top -= 2 * y;
rc->bottom -= 2 * y;
rc++;
}
REGION_IntersectRegion(destObj, destObj, srcObj);
/* Restore the original region */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
{
rc->top += y;
rc->bottom += y;
rc++;
}
REGION_SubtractRegion(destObj, srcObj, destObj);
rc = (PRECT)srcObj->Buffer;
for(i = 0; i < srcObj->rdh.nCount; i++)
{
rc->left -= x;
rc->top += y;
rc->right -= x;
rc->bottom += y;
rc++;
}
REGION_SubtractRegion(destObj, srcObj, destObj);
RGNDATA_UnlockRgn(hDest);
RGNDATA_UnlockRgn(hSrc);
return TRUE;
RGNDATA_UnlockRgn(hDest);
RGNDATA_UnlockRgn(hSrc);
return TRUE;
}