aa_lines.c

ucgui的3.98版本的源代码

/*
*********************************************************************************************************
*                                             uC/GUI V3.98
*                        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"

/*******************************************************************
*
*       static code
*
********************************************************************
*/

/*******************************************************************
*
*       _DemoAntialiasing

  Draws lines with different antialiasing factors
*/
static void _DemoAntialiasing(void) {
  int i, x1, x2, y1, y2;
  const GUI_FONT *font_old;
  y1 = 65;
  y2 = 5;
  /* Set drawing attributes */
  GUI_SetColor(GUI_WHITE);
  GUI_SetBkColor(GUI_BLACK);
  GUI_SetPenShape(GUI_PS_FLAT);
  GUI_Clear();
  /* draw headline */
  font_old = GUI_SetFont(&GUI_Font24_ASCII);
  GUI_SetTextAlign(GUI_TA_HCENTER);
  GUI_DispStringAt("AA_Lines - Sample", 160, 5);
  /* Draw lines without antialiased */
  GUI_Delay(1000);
  GUI_SetFont(&GUI_Font8x16);
  GUI_SetTextAlign(GUI_TA_LEFT);
  GUI_DispStringAtCEOL("draw normal lines using", 5, 40);
  GUI_DispStringAtCEOL("GUI_DrawLine", 5, 55);
  GUI_Delay(2500);
  x1 = 20;
  x2 = 100;
  GUI_SetFont(font_old);
  GUI_DispStringHCenterAt("Normal", (x1 + x2) / 2, 30 + y1);
  for (i = 1; i < 8; i++) {
    GUI_SetPenSize(i);
    GUI_DrawLine(x1, 40 + i * 15 + y1, x2, 40 + i * 15 + y1 + y2);
  }
  /* Draw lines with antialiasing quality factor 2 */
  GUI_Delay(3000);
  GUI_SetFont(&GUI_Font8x16);
  GUI_DispStringAtCEOL("", 5, 40);
  GUI_DispStringAtCEOL("", 5, 55);
  GUI_Delay(200);
  GUI_DispStringAtCEOL("draw antialiased lines using", 5, 40);
  GUI_DispStringAtCEOL("GUI_AA_DrawLine", 5, 55);
  GUI_Delay(3500);
  x1 = 120;
  x2 = 200;
  GUI_AA_SetFactor(2);
  GUI_SetFont(font_old);
  GUI_DispStringHCenterAt("Antialiased\nusing factor 2", (x1 + x2) / 2, 30 + y1);
  for (i = 1; i < 8; i++) {
    GUI_SetPenSize(i);
    GUI_AA_DrawLine(x1, 40 + i * 15 + y1, x2, 40 + i * 15 + y1 + y2);
  }
  /* Draw lines with antialiasing quality factor 6 */
  GUI_Delay(1500);
  x1 = 220;
  x2 = 300;
  GUI_AA_SetFactor(6);
  GUI_SetFont(font_old);
  GUI_DispStringHCenterAt("Antialiased\nusing factor 6", (x1 + x2) / 2, 30 + y1);
  for (i = 1; i < 8; i++) {
    GUI_SetPenSize(i);
    GUI_AA_DrawLine(x1, 40 + i * 15 + y1, x2, 40 + i * 15 + y1 + y2);
  }
  GUI_Delay(7500);
}

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

void MainTask(void) {
  GUI_Init();
  while (1) {
    _DemoAntialiasing();
  }
}