gui_drawpolyline.c

嵌入式操作系统ucosii的gui,即图形用户界面

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              礐/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
* File    : GUI_DrawPolyLine.C
* Purpose : Implementation of GUI_DrawPolyline
*
*
* Version-Date---Author-Explanation
*
* 1.00.00 020517 RS     First release
*
*
* Known problems or limitations with current version
*
*    None.
*
*
* Open issues
*
*    None
*********************************************************************************************************
*/

#include <stddef.h>           /* needed for definition of NULL */
#include "GUI_Protected.H"

/* Draw Poly line, which does not have to be a closed shape */
static void _DrawPolyLine (const GUI_POINT*pPoints, int NumPoints, int x0, int y0) {
  GL_MoveTo(pPoints->x+x0, pPoints->y+y0);
  while (--NumPoints >0) {
    pPoints++;
    GL_DrawLineTo(pPoints->x+x0, pPoints->y+y0);
  }
}

void GUI_DrawPolyLine     (const GUI_POINT* pPoints, int NumPoints, int x0, int y0) {
  GUI_LOCK();
  #if (GUI_WINSUPPORT)
    WM_ADDORG(x0,y0);
    WM_ITERATE_START(NULL); {
  #endif
  _DrawPolyLine (pPoints, NumPoints, x0, y0);
  #if (GUI_WINSUPPORT)
    } WM_ITERATE_END();
  #endif
  GUI_UNLOCK();
}