www.pudn.com > uC-GUI-V3-98.zip > MEMDEV_Banding.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        : MEMDEV_Banding.c 
Purpose     : Example demonstrating the use of banding memory devices 
---------------------------------------------------------------------- 
*/ 
 
#include "GUI.h" 
 
/******************************************************************* 
* 
*       defines 
* 
******************************************************************** 
*/ 
 
#define USE_BANDING_MEMDEV (1) /* Set to 0 for drawing without banding memory device */ 
 
#define SIZE_OF_ARRAY(Array) (sizeof(Array) / sizeof(Array[0])) 
 
/******************************************************************* 
* 
*       static variables 
* 
******************************************************************** 
*/ 
 
static const GUI_POINT aPoints[] = { 
  {-50,  0}, 
  {-10, 10}, 
  {  0, 50}, 
  { 10, 10}, 
  { 50,  0}, 
  { 10,-10}, 
  {  0,-50}, 
  {-10,-10} 
}; 
 
typedef struct { 
  int XPos_Poly, YPos_Poly; 
  int XPos_Text, YPos_Text; 
  GUI_POINT aPointsDest[8]; 
} tDrawItContext; 
 
/******************************************************************* 
* 
*       static code 
* 
******************************************************************** 
*/ 
 
/******************************************************************* 
* 
*       _DrawIt 
*/ 
static void _DrawIt(void * pData) { 
  tDrawItContext * pDrawItContext = (tDrawItContext *)pData; 
  GUI_Clear(); 
  GUI_SetFont(&GUI_Font8x8); 
  GUI_SetTextMode(GUI_TM_TRANS); 
  /* draw background */ 
  GUI_SetColor(GUI_GREEN); 
  GUI_FillRect(pDrawItContext->XPos_Text,  
               pDrawItContext->YPos_Text - 25, 
               pDrawItContext->XPos_Text + 100, 
               pDrawItContext->YPos_Text - 5); 
  /* draw polygon */ 
  GUI_SetColor(GUI_BLUE); 
  GUI_FillPolygon(pDrawItContext->aPointsDest, SIZE_OF_ARRAY(aPoints), 160, 120); 
  /* draw foreground */ 
  GUI_SetColor(GUI_RED); 
  GUI_FillRect(220 - pDrawItContext->XPos_Text,  
               pDrawItContext->YPos_Text + 5, 
               220 - pDrawItContext->XPos_Text + 100, 
               pDrawItContext->YPos_Text + 25); 
} 
 
/******************************************************************* 
* 
*       _DemoBandingMemdev 
*/ 
static void _DemoBandingMemdev(void) { 
  tDrawItContext DrawItContext; 
  int i, swap=0; 
  GUI_SetBkColor(GUI_BLACK); 
  GUI_Clear(); 
  GUI_SetColor(GUI_WHITE); 
  GUI_SetFont(&GUI_Font24_ASCII); 
  GUI_DispStringHCenterAt("MEMDEV_Banding - Sample", 160, 5); 
  GUI_SetFont(&GUI_Font8x9); 
  GUI_DispStringHCenterAt("Banding memory device\nwithout flickering", 160, 40); 
  DrawItContext.XPos_Poly = 160; 
  DrawItContext.YPos_Poly = 120; 
  DrawItContext.YPos_Text = 116; 
  while (1) { 
    swap = ~swap; 
    for (i = 0; i < 220; i++) { 
      float angle = i * 3.1415926 / 55; 
      DrawItContext.XPos_Text = (swap) ? i : 220 - i; 
      /* Rotate the polygon */ 
      GUI_RotatePolygon(DrawItContext.aPointsDest, aPoints,  
                        SIZE_OF_ARRAY(aPoints), angle); 
      #if USE_BANDING_MEMDEV 
      { 
        GUI_RECT Rect = {0, 70, 320,170}; 
        /* Use banding memory device for drawing */ 
        GUI_MEMDEV_Draw(&Rect, &_DrawIt, &DrawItContext, 0, 0); 
      } 
      #else 
        /* Simple drawing without using memory devices */ 
        _DrawIt((void *)&DrawItContext); 
      #endif 
      #ifdef WIN32 
        GUI_Delay(20); /* Use a short delay only in the simulation */ 
      #endif 
    } 
  } 
} 
 
/******************************************************************* 
* 
*       MainTask 
* 
*       Demonstrates banding memory devices 
* 
******************************************************************** 
*/ 
 
void MainTask(void) { 
  GUI_Init(); 
  _DemoBandingMemdev(); 
}