mirror of
https://github.com/reactos/reactos.git
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[WIN32K]
Improve REGION_bMakeFrameRegion and REGION_bMakeSimpleFrameRgn svn path=/trunk/; revision=65734
This commit is contained in:
Timo Kreuzer
parent
fe261bd6e2
commit
542d41ba8b
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@ -1759,80 +1759,92 @@ REGION_SubtractRectFromRgn(
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return REGION_Complexity(prgnDest);
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}
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static
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BOOL
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FASTCALL
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REGION_CreateSimpleFrameRgn(
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PREGION rgn,
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INT x,
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INT y)
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REGION_bMakeSimpleFrameRgn(
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_Inout_ PREGION prgn,
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_In_ PRECTL prclSrc,
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_In_ INT cx,
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_In_ INT cy)
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{
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RECTL rc[4];
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PRECTL prc;
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RECTL arcl[4];
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UINT i;
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if ((x != 0) || (y != 0))
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NT_ASSERT((cx >= 0) && (cy >= 0));
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NT_ASSERT((prclSrc->bottom > prclSrc->top) &&
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(prclSrc->right > prclSrc->left));
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/* Start with an empty region */
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EMPTY_REGION(prgn);
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/* Check for the case where the frame covers the whole rect */
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if (((prclSrc->bottom - prclSrc->top) <= cy * 2) ||
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((prclSrc->right - prclSrc->left) <= cx * 2))
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{
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prc = rc;
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prgn->rdh.rcBound = *prclSrc;
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prgn->Buffer[0] = *prclSrc;
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prgn->rdh.nCount = 1;
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return TRUE;
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}
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if ((rgn->rdh.rcBound.bottom - rgn->rdh.rcBound.top > y * 2) &&
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(rgn->rdh.rcBound.right - rgn->rdh.rcBound.left > x * 2))
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i = 0;
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if (cy != 0)
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{
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/* Top rectangle */
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arcl[i].left = prclSrc->left;
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arcl[i].top = prclSrc->top;
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arcl[i].right = prclSrc->right;
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arcl[i].bottom = prclSrc->top + cy;
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i++;
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}
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if (cx != 0)
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{
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/* Left rectangle */
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arcl[i].left = prclSrc->left;
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arcl[i].top = prclSrc->top + cy;
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arcl[i].right = prclSrc->left + cx;
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arcl[i].bottom = prclSrc->bottom - cy;
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i++;
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/* Right rectangle */
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arcl[i].left = prclSrc->right - cx;
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arcl[i].top = prclSrc->top + cy;
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arcl[i].right = prclSrc->right;
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arcl[i].bottom = prclSrc->bottom - cy;
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i++;
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}
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if (cy != 0)
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{
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/* Bottom rectangle */
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arcl[i].left = prclSrc->left;
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arcl[i].top = prclSrc->bottom - cy;
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arcl[i].right = prclSrc->right;
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arcl[i].bottom = prclSrc->bottom;
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i++;
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}
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if (i != 0)
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{
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/* The frame results in a complex region. rcBounds remains
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the same, though. */
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prgn->rdh.nCount = i;
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NT_ASSERT(prgn->rdh.nCount > 1);
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prgn->rdh.nRgnSize = prgn->rdh.nCount * sizeof(RECT);
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NT_ASSERT(prgn->Buffer == &prgn->rdh.rcBound);
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prgn->Buffer = ExAllocatePoolWithTag(PagedPool,
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prgn->rdh.nRgnSize,
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TAG_REGION);
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if (prgn->Buffer == NULL)
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{
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if (y != 0)
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{
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/* Top rectangle */
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prc->left = rgn->rdh.rcBound.left;
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prc->top = rgn->rdh.rcBound.top;
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prc->right = rgn->rdh.rcBound.right;
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prc->bottom = prc->top + y;
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prc++;
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}
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if (x != 0)
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{
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/* Left rectangle */
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prc->left = rgn->rdh.rcBound.left;
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prc->top = rgn->rdh.rcBound.top + y;
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prc->right = prc->left + x;
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prc->bottom = rgn->rdh.rcBound.bottom - y;
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prc++;
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/* Right rectangle */
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prc->left = rgn->rdh.rcBound.right - x;
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prc->top = rgn->rdh.rcBound.top + y;
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prc->right = rgn->rdh.rcBound.right;
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prc->bottom = rgn->rdh.rcBound.bottom - y;
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prc++;
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}
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if (y != 0)
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{
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/* Bottom rectangle */
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prc->left = rgn->rdh.rcBound.left;
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prc->top = rgn->rdh.rcBound.bottom - y;
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prc->right = rgn->rdh.rcBound.right;
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prc->bottom = rgn->rdh.rcBound.bottom;
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prc++;
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}
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prgn->rdh.nRgnSize = 0;
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return FALSE;
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}
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if (prc != rc)
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{
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/* The frame results in a complex region. rcBounds remains
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the same, though. */
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rgn->rdh.nCount = (DWORD)(prc - rc);
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ASSERT(rgn->rdh.nCount > 1);
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rgn->rdh.nRgnSize = rgn->rdh.nCount * sizeof(RECT);
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rgn->Buffer = ExAllocatePoolWithTag(PagedPool,
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rgn->rdh.nRgnSize,
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TAG_REGION);
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if (rgn->Buffer == NULL)
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{
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rgn->rdh.nRgnSize = 0;
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return FALSE;
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}
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_PRAGMA_WARNING_SUPPRESS(__WARNING_MAYBE_UNINIT_VAR) // rc is initialized
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COPY_RECTS(rgn->Buffer, rc, rgn->rdh.nCount);
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}
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_PRAGMA_WARNING_SUPPRESS(__WARNING_MAYBE_UNINIT_VAR) // arcl is initialized
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COPY_RECTS(prgn->Buffer, arcl, prgn->rdh.nCount);
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}
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return TRUE;
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@ -1842,60 +1854,83 @@ static
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BOOL
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REGION_bMakeFrameRegion(
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_Inout_ PREGION prgnDest,
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_In_ PREGION prgnSrc,
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_Inout_ PREGION prgnSrc,
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_In_ INT cx,
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_In_ INT cy)
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{
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/* Handle negative cx / cy */
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cx = abs(cx);
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cy = abs(cy);
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/* Check border size (the cast is necessary to catch cx/cy == INT_MIN!) */
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if (((UINT)cx > MAX_COORD) || ((UINT)cy > MAX_COORD))
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{
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return FALSE;
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}
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/* Fail on empty source region */
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if (!REGION_NOT_EMPTY(prgnSrc))
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{
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return FALSE;
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}
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/* Handle trivial case */
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if ((cx == 0) && (cy == 0))
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{
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EMPTY_REGION(prgnDest);
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return TRUE;
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}
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/* Handle simple source region */
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if (REGION_Complexity(prgnSrc) == SIMPLEREGION)
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{
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return REGION_bMakeSimpleFrameRgn(prgnDest, &prgnSrc->rdh.rcBound, cx, cy);
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}
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/* Check if we can move the region to create the frame region */
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if ((prgnSrc->rdh.rcBound.left < (MIN_COORD + cx)) ||
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(prgnSrc->rdh.rcBound.top < (MIN_COORD + cy)) ||
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(prgnSrc->rdh.rcBound.right > (MAX_COORD - cx)) ||
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(prgnSrc->rdh.rcBound.bottom > (MAX_COORD - cy)))
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{
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return FALSE;
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}
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/* Copy the source region */
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if (!REGION_CopyRegion(prgnDest, prgnSrc))
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{
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return FALSE;
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}
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if (REGION_Complexity(prgnSrc) == SIMPLEREGION)
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{
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if (!REGION_CreateSimpleFrameRgn(prgnDest, cx, cy))
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{
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return FALSE;
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}
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}
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else
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{
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/* Move the source region to the bottom-right */
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REGION_bOffsetRgn(prgnSrc, cx, cy);
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/* Move the source region to the bottom-right */
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NT_VERIFY(REGION_bOffsetRgn(prgnSrc, cx, cy));
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/* Intersect with the source region (this crops the top-left frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Intersect with the source region (this crops the top-left frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Move the source region to the bottom-left */
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REGION_bOffsetRgn(prgnSrc, -2 * cx, 0);
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/* Move the source region to the bottom-left */
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NT_VERIFY(REGION_bOffsetRgn(prgnSrc, -2 * cx, 0));
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/* Intersect with the source region (this crops the top-right frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Intersect with the source region (this crops the top-right frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Move the source region to the top-left */
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REGION_bOffsetRgn(prgnSrc, 0, -2 * cy);
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/* Move the source region to the top-left */
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NT_VERIFY(REGION_bOffsetRgn(prgnSrc, 0, -2 * cy));
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/* Intersect with the source region (this crops the bottom-right frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Intersect with the source region (this crops the bottom-right frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Move the source region to the top-right */
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REGION_bOffsetRgn(prgnSrc, 2 * cx, 0);
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/* Move the source region to the top-right */
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NT_VERIFY(REGION_bOffsetRgn(prgnSrc, 2 * cx, 0));
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/* Intersect with the source region (this crops the bottom-left frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Intersect with the source region (this crops the bottom-left frame) */
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REGION_IntersectRegion(prgnDest, prgnDest, prgnSrc);
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/* Move the source region back to the original position */
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REGION_bOffsetRgn(prgnSrc, -cx, cy);
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/* Move the source region back to the original position */
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NT_VERIFY(REGION_bOffsetRgn(prgnSrc, -cx, cy));
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/* Finally subtract the cropped region from the source */
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REGION_SubtractRegion(prgnDest, prgnSrc, prgnDest);
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}
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/* Finally subtract the cropped region from the source */
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REGION_SubtractRegion(prgnDest, prgnSrc, prgnDest);
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return TRUE;
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}
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