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527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
/*
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* PROJECT: ReactOS win32 kernel mode subsystem
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: subsystems/win32/win32k/objects/rect.c
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* PURPOSE: Rect functions
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* PROGRAMMER: Timo Kreuzer
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*/
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#include <win32k.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS *****************************************************************/
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BOOL
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FASTCALL
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RECTL_bUnionRect(RECTL *prclDst, const RECTL *prcl1, const RECTL *prcl2)
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{
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if (RECTL_bIsEmptyRect(prcl1))
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{
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if (RECTL_bIsEmptyRect(prcl2))
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{
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RECTL_vSetEmptyRect(prclDst);
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return FALSE;
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}
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else
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{
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*prclDst = *prcl2;
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}
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}
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else
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{
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if (RECTL_bIsEmptyRect(prcl2))
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{
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*prclDst = *prcl1;
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}
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else
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{
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prclDst->left = min(prcl1->left, prcl2->left);
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prclDst->top = min(prcl1->top, prcl2->top);
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prclDst->right = max(prcl1->right, prcl2->right);
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prclDst->bottom = max(prcl1->bottom, prcl2->bottom);
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}
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}
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return TRUE;
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}
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BOOL
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FASTCALL
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RECTL_bIntersectRect(RECTL* prclDst, const RECTL* prcl1, const RECTL* prcl2)
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{
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prclDst->left = max(prcl1->left, prcl2->left);
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prclDst->right = min(prcl1->right, prcl2->right);
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if (prclDst->left < prclDst->right)
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{
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prclDst->top = max(prcl1->top, prcl2->top);
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prclDst->bottom = min(prcl1->bottom, prcl2->bottom);
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if (prclDst->top < prclDst->bottom)
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{
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return TRUE;
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}
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}
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RECTL_vSetEmptyRect(prclDst);
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return FALSE;
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}
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VOID
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FASTCALL
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RECTL_vMakeWellOrdered(RECTL *prcl)
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{
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LONG lTmp;
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if (prcl->left > prcl->right)
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{
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lTmp = prcl->left;
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prcl->left = prcl->right;
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prcl->right = lTmp;
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}
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if (prcl->top > prcl->bottom)
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{
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lTmp = prcl->top;
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prcl->top = prcl->bottom;
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prcl->bottom = lTmp;
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}
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}
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VOID
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FASTCALL
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RECTL_vInflateRect(RECTL *rect, INT dx, INT dy)
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{
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rect->left -= dx;
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rect->top -= dy;
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rect->right += dx;
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rect->bottom += dy;
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}
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/* EOF */
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