/*------------------------------------------------------------*/
/* filename -       framelin.cpp                              */
/*                                                            */
/* function(s)                                                */
/*                  TFrame frameLine member function          */
/*------------------------------------------------------------*/

/*------------------------------------------------------------*/
/*                                                            */
/*    Turbo Vision -  Version 1.0                             */
/*    Copyright (c) 1991 by Borland International             */
/*    All Rights Reserved.                                    */
/*                                                            */
/*    This file Copyright (c) 1993 by J”rn Sierwald           */
/*                                                            */
/*                                                            */
/*------------------------------------------------------------*/

#define Uses_TFrame
#define Uses_TDrawBuffer
#define Uses_TWindow
#define Uses_TRect
#define Uses_TPoint
#define Uses_TEvent
#include <tv.h>

/* Erkl„rung der Mask:

       Bit 0
         |
  Bit 3 - - Bit 1
         |
       Bit 2

Wenn z.B. sichergestellt werden soll, dass eine linke obere Ecke im
Muster vorhanden ist, nimmt man :
  mask |= 0x06 .
*/

void TV_CDECL TFrame::frameLine( TDrawBuffer& frameBuf, short y, short n, uchar color )
{
  unsigned char frameMask[maxViewWidth];
  short int i;
  frameMask[0]=initFrame[n];
  for (i=1; i+1<size.x; i++) frameMask[i]=initFrame[n+1];
  frameMask[size.x-1]=initFrame[n+2];

  TView* p;
  p=owner->last;
  while (1) {
    p=p->next;
    if (p==this) break;
    if ((p->options & ofFramed) && (p->state & sfVisible)) {
      unsigned char mask1, mask2;
      if (y+1<p->origin.y) continue;
      else if (y+1==p->origin.y) { mask1=0x0A; mask2=0x06;}
      else if (y==p->origin.y+p->size.y) { mask1=0x0A; mask2=0x03;}
      else if (y<p->origin.y+p->size.y) { mask1=0; mask2=0x05;}
      else continue;
      unsigned short xMin=p->origin.x;
      unsigned short xMax=p->origin.x+p->size.x;
      if (xMin<1) xMin=1;
      if (xMax>size.x-1) xMax=size.x-1;
      if (xMax>xMin) {
        if (mask1==0) {
          frameMask[xMin-1] |= mask2;
          frameMask[xMax]   |= mask2;
        } else {
          frameMask[xMin-1] |= mask2;
          frameMask[xMax]   |= (mask2 ^ mask1);
          for (i=xMin; i< xMax; i++) {
            frameMask[i] |= mask1;
          }
        }
      }
    }
  } // while
//  unsigned char* src=frameMask;
  unsigned short* dest=frameBuf.data;
  i=size.x;
  short int i1=0;
  while (i--) {
    *dest++= ( ((unsigned short)color) << 8 ) + (unsigned char) frameChars[frameMask[i1]];
    i1++;
  } /* endwhile */
}