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optimize FrameRgn for simple rectangular regions

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svn path=/trunk/; revision=29938
This commit is contained in:
Thomas Bluemel 2007-10-28 20:07:28 +00:00
parent c65189cc6f
commit 6477a25b3a
1 changed files with 128 additions and 44 deletions
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172
reactos/subsystems/win32/win32k/objects/region.c
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@ -1755,6 +1755,77 @@ void FASTCALL REGION_UnionRectWithRegion(const RECT *rect, ROSRGNDATA *rgn)
REGION_UnionRegion(rgn, rgn, &region);
}
BOOL FASTCALL REGION_CreateSimpleFrameRgn(PROSRGNDATA rgn, INT x, INT y)
{
RECT rc[4];
PRECT prc;
if (x != 0 || y != 0)
{
prc = rc;
if (rgn->rdh.rcBound.bottom - rgn->rdh.rcBound.top > y * 2 &&
rgn->rdh.rcBound.right - rgn->rdh.rcBound.left > x * 2)
{
if (y != 0)
{
/* top rectangle */
prc->left = rgn->rdh.rcBound.left;
prc->top = rgn->rdh.rcBound.top;
prc->right = rgn->rdh.rcBound.right;
prc->bottom = prc->top + y;
prc++;
}
if (x != 0)
{
/* left rectangle */
prc->left = rgn->rdh.rcBound.left;
prc->top = rgn->rdh.rcBound.top + y;
prc->right = prc->left + x;
prc->bottom = rgn->rdh.rcBound.bottom - y;
prc++;
/* right rectangle */
prc->left = rgn->rdh.rcBound.right - x;
prc->top = rgn->rdh.rcBound.top + y;
prc->right = rgn->rdh.rcBound.right;
prc->bottom = rgn->rdh.rcBound.bottom - y;
prc++;
}
if (y != 0)
{
/* bottom rectangle */
prc->left = rgn->rdh.rcBound.left;
prc->top = rgn->rdh.rcBound.bottom - y;
prc->right = rgn->rdh.rcBound.right;
prc->bottom = rgn->rdh.rcBound.bottom;
prc++;
}
}
if (prc != rc)
{
/* The frame results in a complex region. rcBounds remains
the same, though. */
rgn->rdh.nCount = (DWORD)(prc - rc);
ASSERT(rgn->rdh.nCount > 1);
rgn->rdh.nRgnSize = rgn->rdh.nCount * sizeof(RECT);
rgn->Buffer = ExAllocatePoolWithTag( PagedPool, rgn->rdh.nRgnSize, TAG_REGION);
if (!rgn->Buffer)
{
rgn->rdh.nRgnSize = 0;
return FALSE;
}
COPY_RECTS(rgn->Buffer, rc, rgn->rdh.nCount);
}
}
return TRUE;
}
BOOL FASTCALL REGION_CreateFrameRgn(HRGN hDest, HRGN hSrc, INT x, INT y)
{
PROSRGNDATA srcObj, destObj;
@ -1784,57 +1855,70 @@ BOOL FASTCALL REGION_CreateFrameRgn(HRGN hDest, HRGN hSrc, INT x, INT y)
return FALSE;
}
/* Original region moved to right */
rc = (PRECT)srcObj->Buffer;
for (i = 0; i < srcObj->rdh.nCount; i++)
if (srcObj->rdh.iType == SIMPLEREGION)
{
rc->left += x;
rc->right += x;
rc++;
if (!REGION_CreateSimpleFrameRgn(destObj, x, y))
{
EMPTY_REGION(destObj);
RGNDATA_UnlockRgn(destObj);
RGNDATA_UnlockRgn(srcObj);
return FALSE;
}
}
REGION_IntersectRegion(destObj, destObj, srcObj);
else
{
/* 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);
/* 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);
/* 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);
/* 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);
/* 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);
/* 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);
/* 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++;
/* 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);
}
REGION_SubtractRegion(destObj, srcObj, destObj);
RGNDATA_UnlockRgn(destObj);
RGNDATA_UnlockRgn(srcObj);