www.pudn.com > uC-GUI-V3-98.zip > 2DGL_DrawJPEG.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        : 2DGL_DrawJPG.c 
Purpose     : Example for drawing JPG files 
---------------------------------------------------------------------- 
*/ 
 
#include  
#include  
 
#include "GUI.h" 
 
/******************************************************************* 
* 
*       Static functions 
* 
******************************************************************** 
*/ 
 
/******************************************************************* 
* 
*       _ShowJPG 
* 
* Shows the contents of a JPEG file 
*/ 
static void _ShowJPG(const char * sFilename) { 
  int XSize, YSize, XPos, YPos; 
  GUI_JPEG_INFO Info; 
  DWORD NumBytesRead; 
  HANDLE hFile = CreateFile(sFilename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); 
  DWORD FileSize = GetFileSize(hFile, NULL); 
  char * pFile = malloc(FileSize); 
  ReadFile(hFile, pFile, FileSize, &NumBytesRead, NULL); 
  CloseHandle(hFile); 
  GUI_ClearRect(0, 60, 319, 239); 
  GUI_JPEG_GetInfo(pFile, FileSize, &Info); 
  XSize = Info.XSize; 
  YSize = Info.YSize; 
  XPos = (XSize > 320) ?  0 : 160 - (XSize / 2); 
  YPos = (YSize > 180) ? 60 : 150 - (YSize / 2); 
  if (!GUI_JPEG_Draw(pFile, FileSize, XPos, YPos)) { 
    GUI_Delay(2000); 
  } 
  free(pFile); 
} 
 
/******************************************************************* 
* 
*       _DrawWindowsDirectoryBitmaps 
* 
* Iterates over all *.jpg-files of the windows directory 
*/ 
static void _DrawWindowsDirectoryBitmaps(void) { 
  char acPath[_MAX_PATH]; 
  char acMask[_MAX_PATH]; 
  char acFile[_MAX_PATH]; 
  WIN32_FIND_DATA Context; 
  HANDLE hFind; 
 
  GUI_SetBkColor(GUI_BLACK); 
  GUI_Clear(); 
  GUI_SetColor(GUI_WHITE); 
  GUI_SetFont(&GUI_Font24_ASCII); 
  GUI_DispStringHCenterAt("DrawJPG - Sample", 160, 5); 
  GUI_SetFont(&GUI_Font8x16); 
 
  GetWindowsDirectory(acPath, sizeof(acPath)); 
  sprintf(acMask, "%s\\web\\wallpaper\\*.jpg", acPath); 
  hFind = FindFirstFile(acMask, &Context); 
  if (hFind != INVALID_HANDLE_VALUE) { 
    do { 
      sprintf(acFile, "%s\\web\\wallpaper\\%s", acPath, Context.cFileName); 
      GUI_DispStringAtCEOL(acFile, 5, 40); 
      _ShowJPG(acFile); 
    } while (FindNextFile(hFind, &Context)); 
  } 
} 
 
/******************************************************************* 
* 
*       MainTask 
* 
******************************************************************** 
*/ 
 
void MainTask(void) { 
  GUI_Init(); 
  while(1) { 
    _DrawWindowsDirectoryBitmaps(); 
  } 
}