aa_lines.c

来自「基于uC的GUI_ADS1.2程序包」· C语言 代码 · 共 61 行

/*
*********************************************************************************************************
*                                                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        : AA_Lines.c
Purpose     : Shows lines with different antialiasing qualities
----------------------------------------------------------------------
*/

#include "GUI.H"

/*******************************************************************
*
*         Show lines with different antialiasing qualities
*
********************************************************************
*/

void DemoAntialiasing(void) {
  int i, x1, x2;
  int y = 2;
  /* Set drawing attributes */
  GUI_SetColor(GUI_BLACK);
  GUI_SetBkColor(GUI_WHITE);
  GUI_SetPenShape(GUI_PS_FLAT);
  GUI_Clear();
  x1 = 10; x2 = 90;
  /* Draw lines without antialiasing */
  GUI_DispStringHCenterAt("\nNormal", (x1 + x2) / 2, 10);
  for (i = 1; i < 12; i++) {
    GUI_SetPenSize(i);
    GUI_DrawLine(x1, 40 + i * 15, x2, 40 + i * 15 +  y);
  }
  x1 = 110; x2 = 190;
  /* Draw lines with antialiasing quality faktor 2 */
  GUI_AA_SetFactor(2);
  GUI_DispStringHCenterAt("Antialiased\n\nusing factor 2", (x1 + x2) / 2, 10);
  for (i = 1; i < 12; i++) {
    GUI_SetPenSize(i);
    GUI_AA_DrawLine(x1, 40 + i * 15, x2, 40 + i * 15 +  y);
  }
  x1 = 210; x2 = 290;
  /* Draw lines with antialiasing quality faktor 6 */
  GUI_AA_SetFactor(6);
  GUI_DispStringHCenterAt("Antialiased\n\nusing factor 6", (x1 + x2) / 2, 10);
  for (i = 1; i < 12; i++) {
    GUI_SetPenSize(i);
    GUI_AA_DrawLine(x1, 40 + i * 15, x2, 40 + i * 15 +  y);
  }
}