www.pudn.com > uC-GUI-V3-98.zip > AA_Lines.c

/* 
********************************************************************************************************* 
*                                             uC/GUI V3.98 
*                        Universal graphic software for embedded applications 
* 
*                       (c) Copyright 2002, Micrium Inc., Weston, FL 
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH 
* 
*              µC/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(); 
  } 
}