2DGL_DrawJPEG.c

00001 /*********************************************************************
00002 *                SEGGER Microcontroller GmbH                         *
00003 *        Solutions for real time microcontroller applications        *
00004 **********************************************************************
00005 *                                                                    *
00006 *        (c) 1996 - 2018  SEGGER Microcontroller GmbH                *
00007 *                                                                    *
00008 *        Internet: www.segger.com    Support:  support@segger.com    *
00009 *                                                                    *
00010 **********************************************************************
00011 
00012 ** emWin V5.48 - Graphical user interface for embedded applications **
00013 All  Intellectual Property rights  in the Software belongs to  SEGGER.
00014 emWin is protected by  international copyright laws.  Knowledge of the
00015 source code may not be used to write a similar product.  This file may
00016 only be used in accordance with the following terms:
00017 
00018 The software  has been licensed to  Cypress Semiconductor Corporation,
00019 whose registered  office is situated  at 198 Champion Ct. San Jose, CA 
00020 95134 USA  solely for the  purposes of creating  libraries for Cypress
00021 PSoC3 and  PSoC5 processor-based devices,  sublicensed and distributed
00022 under  the  terms  and  conditions  of  the  Cypress  End User License
00023 Agreement.
00024 Full source code is available at: www.segger.com
00025 
00026 We appreciate your understanding and fairness.
00027 ----------------------------------------------------------------------
00028 Licensing information
00029 Licensor:                 SEGGER Microcontroller Systems LLC
00030 Licensed to:              Cypress Semiconductor Corp, 198 Champion Ct., San Jose, CA 95134, USA
00031 Licensed SEGGER software: emWin
00032 License number:           GUI-00319
00033 License model:            Services and License Agreement, signed June 10th, 2009
00034 Licensed platform:        Any Cypress platform (Initial targets are: PSoC3, PSoC5)
00035 ----------------------------------------------------------------------
00036 Support and Update Agreement (SUA)
00037 SUA period:               2009-06-12 - 2022-07-27
00038 Contact to extend SUA:    sales@segger.com
00039 ----------------------------------------------------------------------
00040 File        : 2DGL_DrawJPEG.c
00041 Purpose     : Sample for drawing JPEG files.
00042 Requirements: WindowManager - ( )
00043               MemoryDevices - ( )
00044               AntiAliasing  - ( )
00045               VNC-Server    - ( )
00046               PNG-Library   - ( )
00047               TrueTypeFonts - ( )
00048 
00049               Can be used in a MS Windows environment only!
00050 ----------------------------------------------------------------------
00051 */
00052 
00053 #ifndef SKIP_TEST
00054 
00055 #include <windows.h>
00056 #include <stdio.h>
00057 
00058 #include "GUI.h"
00059 
00060 /*********************************************************************
00061 *
00062 *       Defines
00063 *
00064 **********************************************************************
00065 */
00066 #define NUM_IMAGES_UNTIL_HINT 5
00067 #define TITLE_HEIGHT          40
00068 #define BORDER_SIZE           5
00069 #define YPOS_IMAGE            73
00070 
00071 //
00072 // Recommended memory to run the sample with adequate performance
00073 //
00074 #define RECOMMENDED_MEMORY (1024L * 200)
00075 
00076 /*********************************************************************
00077 *
00078 *       Static functions
00079 *
00080 **********************************************************************
00081 */
00082 /*********************************************************************
00083 *
00084 *       _DrawJPEGs
00085 *
00086 * Function description
00087 *   Draws the given JPEG image.
00088 */
00089 static void _DrawJPEGs(const char * sFileName) {
00090   static int      i;
00091   const char      acError[] = "There is possibly not enough memory to display this JPEG image.\n\nPlease assign more memory to emWin in GUIConf.c.";
00092   GUI_JPEG_INFO   Info;
00093   GUI_RECT        Rect;
00094   HANDLE          hFile;
00095   DWORD           NumBytesRead;
00096   DWORD           FileSize;
00097   char          * pFile;
00098   int             xSize,  ySize;
00099   int             xPos,   yPos;
00100   int             r;
00101 
00102   xSize = LCD_GetXSize();
00103   ySize = LCD_GetYSize();
00104   //
00105   // Display file name.
00106   //
00107   Rect.x0 = BORDER_SIZE;
00108   Rect.y0 = TITLE_HEIGHT;
00109   Rect.x1 = xSize - BORDER_SIZE - 1;
00110   Rect.y1 = YPOS_IMAGE - 1;
00111   GUI_ClearRectEx(&Rect);
00112   GUI_SetTextMode(GUI_TM_NORMAL);
00113   GUI_SetFont(&GUI_Font8x16);
00114   GUI_DispStringInRectWrap(sFileName, &Rect, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_CHAR);
00115   //
00116   // Clear the area in which the JPEG files are displayed.
00117   //
00118   Rect.x0 = BORDER_SIZE;
00119   Rect.y0 = YPOS_IMAGE;
00120   Rect.x1 = xSize - BORDER_SIZE - 1;
00121   Rect.y1 = ySize - BORDER_SIZE - 1;
00122   GUI_ClearRectEx(&Rect);
00123   //
00124   // Load image.
00125   //
00126   hFile    = CreateFile(sFileName, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
00127   FileSize = GetFileSize(hFile, NULL);
00128   pFile    = malloc(FileSize);
00129   ReadFile(hFile, pFile, FileSize, &NumBytesRead, NULL);
00130   CloseHandle(hFile);
00131   //
00132   // Check if the current JPEG image fits on the screen.
00133   //
00134   GUI_JPEG_GetInfo(pFile, FileSize, &Info);
00135   xSize -= BORDER_SIZE * 2 + 1;
00136   ySize -= YPOS_IMAGE + BORDER_SIZE + 1;
00137   //
00138   // Display the image centered.
00139   //
00140   xPos = BORDER_SIZE + (xSize - Info.XSize) / 2;
00141   yPos = YPOS_IMAGE  + (ySize - Info.YSize) / 2;
00142   GUI_SetClipRect(&Rect);
00143   r = GUI_JPEG_Draw(pFile, FileSize, xPos, yPos);
00144   GUI_SetClipRect(NULL);
00145   if (r) {
00146     //
00147     // The image could not be displayed successfully. Show an error message.
00148     //
00149     GUI_DispStringInRectWrap(acError, &Rect, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_WORD);
00150   } else {
00151     GUI_Delay(2000);
00152     if ((Info.XSize > xSize) || (Info.YSize > ySize)) {
00153       //
00154       // Inform the user about the possibility of scaling JPEG images.
00155       //
00156       if (i == 0) {
00157         GUI_ClearRectEx(&Rect);
00158         GUI_DispStringInRectWrap("JPEG images can be scaled as it is shown in 2DGL_JPEG_DrawScaled.c.",  &Rect, GUI_TA_BOTTOM | GUI_TA_HCENTER, GUI_WRAPMODE_WORD);
00159         GUI_Delay(3000);
00160       }
00161       i++;
00162       if (i == NUM_IMAGES_UNTIL_HINT) {
00163         i = 0;
00164       }
00165     }
00166   }
00167   free(pFile);
00168 }
00169 
00170 /*********************************************************************
00171 *
00172 *       _GetFirstBitmapDirectory
00173 *
00174 * Function description
00175 *   Returns the first directory which contains one or more JPG files.
00176 */
00177 static int _GetFirstBitmapDirectory(char * pDir, char * pBuffer) {
00178   WIN32_FIND_DATA Context;
00179   HANDLE          hFind;
00180   char            acMask[_MAX_PATH];
00181   char            acPath[_MAX_PATH];
00182 
00183   sprintf(acMask, "%s\\*.jpg", pDir);
00184   hFind = FindFirstFile(acMask, &Context);
00185   if (hFind != INVALID_HANDLE_VALUE) {
00186     sprintf(pBuffer, "%s\\", pDir);
00187     return 1;
00188   }
00189   sprintf(acMask, "%s\\*.", pDir);
00190   hFind = FindFirstFile(acMask, &Context);
00191   if (hFind != INVALID_HANDLE_VALUE) {
00192     do {
00193       if ((strcmp(Context.cFileName, ".") != 0) && (strcmp(Context.cFileName, "..") != 0)) {
00194         if (Context.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
00195           sprintf(acPath, "%s\\%s", pDir, Context.cFileName);
00196           if (_GetFirstBitmapDirectory(acPath, pBuffer)) {
00197             return 1;
00198           }
00199         }
00200       }
00201     } while (FindNextFile(hFind, &Context));
00202   }
00203   return 0;
00204 }
00205 
00206 /*******************************************************************
00207 *
00208 *       _DrawJPEGsFromWindowsDir
00209 *
00210 * Function description
00211 *   Iterates over all JPEG files in a Windows sub folder.
00212 */
00213 static void _DrawJPEGsFromWindowsDir(void) {
00214   WIN32_FIND_DATA Context;
00215   HANDLE          hFind;
00216   char            acPath[_MAX_PATH];
00217   char            acMask[_MAX_PATH];
00218   char            acFile[_MAX_PATH];
00219   char            acBuffer[_MAX_PATH];
00220   int             xSize;
00221 
00222   xSize = LCD_GetXSize();
00223   GUI_SetBkColor(GUI_BLACK);
00224   GUI_Clear();
00225   GUI_SetColor(GUI_WHITE);
00226   GUI_SetFont(&GUI_Font24_ASCII);
00227   GUI_DispStringHCenterAt("Draw JPEG - Sample", xSize / 2, 5);
00228   GetWindowsDirectory(acBuffer, sizeof(acBuffer));
00229   _GetFirstBitmapDirectory(acBuffer, acPath);
00230   sprintf(acMask, "%s*.jp*", acPath);
00231   hFind = FindFirstFile(acMask, &Context);
00232   if (hFind != INVALID_HANDLE_VALUE) {
00233     do {
00234       sprintf(acFile, "%s%s", acPath, Context.cFileName);
00235       _DrawJPEGs(acFile);
00236     } while (FindNextFile(hFind, &Context));
00237   } else {
00238     GUI_DispStringHCenterAt("No JPEG files found!", 160, 60);
00239     GUI_Delay(2000);
00240   }
00241 }
00242 
00243 /*********************************************************************
00244 *
00245 *       Public code
00246 *
00247 **********************************************************************
00248 */
00249 /*********************************************************************
00250 *
00251 *       MainTask
00252 */
00253 void MainTask(void) {
00254   GUI_Init();
00255   //
00256   // Check if recommended memory for the sample is available
00257   //
00258   if (GUI_ALLOC_GetNumFreeBytes() < RECOMMENDED_MEMORY) {
00259     GUI_ErrorOut("Not enough memory available."); 
00260     return;
00261   }
00262   while (1) {
00263     _DrawJPEGsFromWindowsDir();
00264   }
00265 }
00266 
00267 #endif
00268 
00269 /*************************** End of file ****************************/