lcd_drawvline.c

来自「uc-gui.rar」· C语言 代码 · 共 65 行

/*********************************************************************
*                SEGGER MICROCONTROLLER SYSTEME GmbH                 *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 2002         SEGGER Microcontroller Systeme GmbH        *
*                                                                    *
*        Internet: www.segger.com    Support:  [e-mail]    *
*                                                                    *
**********************************************************************

**** emWin/GSC Grafical user interface for embedded applications ****
emWin 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 re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File        : LCD_DrawVLine.c
Purpose     : Implementation of optional routines
---------------------------END-OF-HEADER------------------------------
*/


#include "LCD_Private.h"
#include "GUI_Private.h"

/*
        *********************************************************
        *                                                       *
        *       Macros for internal use                         *
        *                                                       *
        *********************************************************
*/

#define RETURN_IF_Y_OUT() \
  if (y < GUI_Context.ClipRect.y0) return;             \
  if (y > GUI_Context.ClipRect.y1) return;

#define RETURN_IF_X_OUT() \
  if (x < GUI_Context.ClipRect.x0) return;             \
  if (x > GUI_Context.ClipRect.x1) return;

#define CLIP_X() \
  if (x0 < GUI_Context.ClipRect.x0) { x0 = GUI_Context.ClipRect.x0; } \
  if (x1 > GUI_Context.ClipRect.x1) { x1 = GUI_Context.ClipRect.x1; }

#define CLIP_Y() \
  if (y0 < GUI_Context.ClipRect.y0) { y0 = GUI_Context.ClipRect.y0; } \
  if (y1 > GUI_Context.ClipRect.y1) { y1 = GUI_Context.ClipRect.y1; }



void LCD_DrawVLine  (int x, int y0,  int y1) {
  /* Perform clipping and check if there is something to do */
  RETURN_IF_X_OUT();
  CLIP_Y();
  if (y1<y0)
    return;
  /* Call driver to draw */
  LCDDEV_L0_DrawVLine(x, y0, y1);
}