FONT_ShowXBF.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        : FONT_ShowXBF.c
00041 Purpose     : Shows how to use (E)xternal (B)inary (F)onts
00042 Requirements: WindowManager - (x)
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 
00057 #include "GUI.h"
00058 #include "EDIT.h"
00059 
00060 //
00061 // Recommended memory to run the sample with adequate performance
00062 //
00063 #define RECOMMENDED_MEMORY (1024L * 5)
00064 
00065 /*********************************************************************
00066 *
00067 *       Static code
00068 *
00069 **********************************************************************
00070 */
00071 /*********************************************************************
00072 *
00073 *       _GetFileName
00074 *
00075 * Function description
00076 *   Returns the file name of the XBF file to be used
00077 */
00078 static void _GetFileName(char * pPath, unsigned MaxSize) {
00079   WM_HWIN hWin;
00080   
00081   //
00082   // Set default value on first call
00083   //
00084   if (!strlen(pPath)) {
00085     strcpy(pPath, "Sample\\Tutorial\\FONT_ShowXBF\\ExtBinFont.xbf");
00086   }
00087   // Display small hint
00088   GUI_SetFont(&GUI_Font10_ASCII);
00089   GUI_DispStringHCenterAt("Please enter the file name of the XBF-file:", 160, 80);
00090   //
00091   // Create edit widget
00092   //
00093   hWin = EDIT_Create(10, 120, 300, 20, 0, MaxSize, WM_CF_SHOW);
00094   EDIT_SetText(hWin, pPath);
00095   WM_SetFocus(hWin);
00096   //
00097   // Wait until GUI_KEY_ENTER has been pressed
00098   //
00099   while (GUI_GetKey() != GUI_KEY_ENTER) {
00100     GUI_Delay(100);
00101   }
00102   //
00103   // Get filename from EDIT widget
00104   //
00105   EDIT_GetText(hWin, pPath, MaxSize);
00106   //
00107   // Create edit widget
00108   //
00109   WM_DeleteWindow(hWin);
00110   //
00111   // Clear screen
00112   //
00113   GUI_ClearRect(0, 40, 319, 239);
00114 }
00115 
00116 /*********************************************************************
00117 *
00118 *       _cbGetData
00119 *
00120 * Function description
00121 *   Callback function for getting font data
00122 *
00123 * Parameters:
00124 *   Off      - Position of XBF file to be read
00125 *   NumBytes - Number of requested bytes
00126 *   pVoid    - Application defined pointer
00127 *   pBuffer  - Pointer to buffer to be filled by the function
00128 *
00129 * Return value:
00130 *   0 on success, 1 on error
00131 */
00132 static int _cbGetData(U32 Off, U16 NumBytes, void * pVoid, void * pBuffer) {
00133   HANDLE hFile;
00134   DWORD  NumBytesRead;
00135 
00136   hFile = *(HANDLE *)pVoid;
00137   //
00138   // Set file pointer to the requested position
00139   //
00140   if (SetFilePointer(hFile, Off, 0, FILE_BEGIN) == 0xFFFFFFFF) {
00141     return 1; // Error
00142   }
00143   //
00144   // Read font data
00145   //
00146   if (!ReadFile(hFile, pBuffer, NumBytes, &NumBytesRead, 0)) {
00147     return 1; // Error
00148   }
00149   if (NumBytesRead != NumBytes) {
00150     return 1; // Error
00151   }
00152   return 0;   // Ok
00153 }
00154 
00155 /*********************************************************************
00156 *
00157 *       _ShowXBF
00158 *
00159 * Function description
00160 *   Small sub routine which creates (and selects) a XBF font,
00161 *   shows 'Hello world!' and waits for a keypress
00162 */
00163 static void _ShowXBF(void * pVoid) {
00164   GUI_XBF_DATA XBF_Data;
00165   GUI_FONT     Font;
00166 
00167   //
00168   // Create XBF font
00169   //
00170   GUI_XBF_CreateFont(&Font,             // Pointer to GUI_FONT structure in RAM
00171                      &XBF_Data,         // Pointer to GUI_XBF_DATA structure in RAM
00172                      GUI_XBF_TYPE_PROP, // Font type to be created
00173                      _cbGetData,        // Pointer to callback function
00174                      pVoid);            // Pointer to be passed to GetData function
00175   //
00176   // Show 'Hello world!'
00177   //
00178   GUI_DispStringHCenterAt("Hello world!", 160, 80);
00179   //
00180   // Display hint
00181   //
00182   GUI_SetFont(&GUI_Font13_ASCII);
00183   GUI_DispStringHCenterAt("Press any key to continue...", 160, 120);
00184   //
00185   // Wait for pressing a key
00186   //
00187   while (!GUI_GetKey()) {
00188     GUI_Delay(100);
00189   }
00190   //
00191   // Delete XBF font and clear display
00192   //
00193   GUI_XBF_DeleteFont(&Font);
00194   GUI_ClearRect(0, 40, 319, 239);
00195 }
00196 
00197 /*********************************************************************
00198 *
00199 *       Public code
00200 *
00201 **********************************************************************
00202 */
00203 /*********************************************************************
00204 *
00205 *       MainTask
00206 */
00207 void MainTask(void) {
00208   HANDLE hFile;
00209   char   acPath[_MAX_PATH] = {0};
00210 
00211   //
00212   // Initialize emWin
00213   //
00214   GUI_Init(); 
00215   //
00216   // Check if recommended memory for the sample is available
00217   //
00218   if (GUI_ALLOC_GetNumFreeBytes() < RECOMMENDED_MEMORY) {
00219     GUI_ErrorOut("Not enough memory available."); 
00220     return;
00221   }
00222   GUI_SetFont(&GUI_Font24_ASCII);
00223   GUI_DispStringHCenterAt("External binary font sample", 160, 5);
00224   while (1) {
00225     //
00226     // Get font file name...
00227     //
00228     _GetFileName(acPath, sizeof(acPath));
00229     //
00230     // ...and open the file
00231     //
00232     hFile = CreateFile(acPath, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
00233     if (hFile != INVALID_HANDLE_VALUE) {
00234       //
00235       // On success call demo routine
00236       //
00237       _ShowXBF(&hFile);
00238       CloseHandle(hFile);
00239     } else {
00240       //
00241       // On error show message box
00242       //
00243       GUI_MessageBox("File not found!", "Error", GUI_MESSAGEBOX_CF_MODAL);
00244       GUI_ClearRect(0, 40, 319, 239);
00245     }
00246   }
00247 }
00248 
00249 #endif
00250 
00251 /*************************** End of file ****************************/
00252