clip.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 62 行

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*                            Open Watcom Project
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#include "gdefn.h"


short _WCI86FAR _CGRAPH _setclip( short mode )
/*=======================================

   This routine sets the clipping indicator. */

{
    short               prev;

    prev = _Clipping;
    _Clipping = mode;
    if( _Clipping ) {
        _CurrState->clip.xmin = _CurrState->clip_def.xmin;
        _CurrState->clip.xmax = _CurrState->clip_def.xmax;
        _CurrState->clip.ymin = _CurrState->clip_def.ymin;
        _CurrState->clip.ymax = _CurrState->clip_def.ymax;
    } else {
        _CurrState->clip.xmin = 0;
        _CurrState->clip.xmax = _CurrState->vc.numxpixels - 1;
        _CurrState->clip.ymin = 0;
        _CurrState->clip.ymax = _CurrState->vc.numypixels - 1;
    }
    _resetscalefactor();
    return( prev );
}

Entry( _SETCLIP, _setclip ) // alternate entry-point