/*** $Id: clip.c,v 1.10.6.2 2005/02/16 07:46:46 weiym Exp $**** Clipping operations of GDI.**** Copyright (C) 2003 Feynman Software.** Copyright (C) 2000 ~ 2002 Wei Yongming.**** Current maintainer: Wei Yongming.**** Create date: 2000/06/12, derived from original gdi.c*//*** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program is distributed in the hope that it will be useful,** but WITHOUT ANY WARRANTY; without even the implied warranty of** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the** GNU General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*//*** TODO:*/ #include "common.h"#include "minigui.h"#include "gdi.h"#include "window.h"#include "cliprect.h"#include "gal.h"#include "internals.h"#include "ctrlclass.h"#include "dc.h"#include "gdidecl.h"#ifndef _LITE_VERSIONextern BOOL dc_GenerateECRgn (PDC pdc, BOOL fForce);#define LOCK_RGN() \        pthread_mutex_lock (&pdc->pGCRInfo->lock);#define UNLOCK_RGN() \        pthread_mutex_unlock (&pdc->pGCRInfo->lock);#else#define LOCK_RGN()#ifndef _STAND_ALONE#define UNLOCK_RGN() \        if (!mgIsServer) unlock_scr_sem ();#else#define UNLOCK_RGN()#endif#endif/************************* Clipping support **********************************/void GUIAPI ExcludeClipRect(HDC hdc, const RECT* prc){    PDC pdc;    RECT rc = *prc;    pdc = dc_HDC2PDC(hdc);    NormalizeRect(&rc);    if (IsRectEmpty (&rc)) return;    SubtractClipRect (&pdc->lcrgn, &rc);    // Transfer logical to device to screen here.    coor_LP2SP(pdc, &rc.left, &rc.top);    coor_LP2SP(pdc, &rc.right, &rc.bottom);    NormalizeRect(&rc);    SubtractClipRect (&pdc->ecrgn, &rc);}void GUIAPI IncludeClipRect (HDC hdc, const RECT* prc){    PDC pdc;    RECT rc = *prc;    pdc = dc_HDC2PDC(hdc);    NormalizeRect(&rc);    if (IsRectEmpty (&rc)) return;    SubtractClipRect (&pdc->lcrgn, &rc);    AddClipRect (&pdc->lcrgn, &rc);        // Transfer logical to device to screen here.    coor_LP2SP(pdc, &rc.left, &rc.top);    coor_LP2SP(pdc, &rc.right, &rc.bottom);    NormalizeRect(&rc);    if (dc_IsGeneralHDC(hdc)) {        LOCK_RGN();        dc_GenerateECRgn (pdc, TRUE);        UNLOCK_RGN();    }    else {        SubtractClipRect (&pdc->ecrgn, &rc);        IntersectClipRect (&pdc->ecrgn, &rc);    }}void GUIAPI ClipRectIntersect(HDC hdc, const RECT* prc){    PDC pdc;    RECT rc;    pdc = dc_HDC2PDC(hdc);    rc = *prc;    NormalizeRect(&rc);    if (IsRectEmpty (&rc)) return;    IntersectClipRect (&pdc->lcrgn, &rc);    // Transfer logical to device to screen here.    coor_LP2SP(pdc, &rc.left, &rc.top);    coor_LP2SP(pdc, &rc.right, &rc.bottom);    NormalizeRect(&rc);    IntersectClipRect (&pdc->ecrgn, &rc);}void GUIAPI SelectClipRect (HDC hdc, const RECT* prc){    PDC pdc;    RECT rc;    pdc = dc_HDC2PDC(hdc);    if (prc) {        rc = *prc;        NormalizeRect(&rc);        if (IsRectEmpty (&rc)) return;        SetClipRgn (&pdc->lcrgn, &rc);        coor_LP2SP(pdc, &rc.left, &rc.top);        coor_LP2SP(pdc, &rc.right, &rc.bottom);        NormalizeRect(&rc);                if (!IntersectRect (&rc, &rc, &pdc->DevRC))            return;    }    else {        EmptyClipRgn (&pdc->lcrgn);        rc = pdc->DevRC;    }        if (dc_IsGeneralHDC(hdc)) {        LOCK_RGN();        dc_GenerateECRgn (pdc, TRUE);        UNLOCK_RGN();    }    else        SetClipRgn (&pdc->ecrgn, &rc);}void GUIAPI SelectClipRegion (HDC hdc, const CLIPRGN* pRgn){    PDC pdc;    PCLIPRECT pCRect;    PCLIPRGN pLcrgn;    pdc = dc_HDC2PDC(hdc);    pLcrgn = &pdc->lcrgn;    pCRect = pRgn->head;    if (pCRect) {        SetClipRgn (pLcrgn, &pCRect->rc);        pCRect = pCRect->next;        while (pCRect) {            SubtractClipRect (pLcrgn, &pCRect->rc);            AddClipRect (pLcrgn, &pCRect->rc);            pCRect = pCRect->next;        }    }    else        return;    if (dc_IsGeneralHDC(hdc)) {        LOCK_RGN();        dc_GenerateECRgn (pdc, TRUE);        UNLOCK_RGN();    }    else {        // not implemented.    }}void GUIAPI GetBoundsRect (HDC hdc, RECT* pRect){    PDC pdc;    pdc = dc_HDC2PDC(hdc);    *pRect = pdc->lcrgn.rcBound;}BOOL GUIAPI PtVisible (HDC hdc, int x, int y){    PCLIPRECT pClipRect;    PDC pdc;    pdc = dc_HDC2PDC(hdc);    pClipRect = pdc->lcrgn.head;    if (pClipRect == NULL) {        RECT rc = pdc->DevRC;        coor_SP2LP (pdc, &rc.left, &rc.top);        coor_SP2LP (pdc, &rc.right, &rc.bottom);        return PtInRect (&rc, x, y);    }            while (pClipRect) {        if (PtInRect (&(pClipRect->rc), x, y)) return TRUE;        pClipRect = pClipRect->next;    }    return FALSE;}BOOL GUIAPI RectVisible (HDC hdc, const RECT* pRect){    PCLIPRECT pClipRect;    PDC pdc;    pdc = dc_HDC2PDC(hdc);    pClipRect = pdc->lcrgn.head;    if (pClipRect == NULL) {        RECT rc = pdc->DevRC;        coor_SP2LP (pdc, &rc.left, &rc.top);        coor_SP2LP (pdc, &rc.right, &rc.bottom);        return DoesIntersect (&rc, pRect);    }    while (pClipRect) {        if (DoesIntersect (pRect, &(pClipRect->rc)))            return TRUE;        pClipRect = pClipRect->next;    }    return FALSE;}