emwin BMP图片显示问题

SXP_F4 · 发表于 2016-6-25 10:16:19

本帖最后由 SXP_F4 于 2016-6-25 10:40 编辑

如题，最近用原子开发板跑emwin 5.26库，显示SD卡上的BMP图片时，出现图中屏幕下面重复显示问题，并且当图片大于650*390时，就显示不出来，百思不得其解？

无桌面图标

有桌面图标

无背景

GUI内存从800K改为500K

应该是与emwin内存分配有关，内存是使用外部SRAM，内存分配越小，重复越多
/*
创建一个基于emwin的桌面
*/

#include "GUI.h"
#include "WM.h"
#include "ImageSrc.h"
#include "ICONVIEW.h"
#include "ff.h"
#include "stdio.h"
#include "includes.h"
/*********************************************************************
*
*    Types
*
**********************************************************************
*/

typedef struct {
const GUI_BITMAP * pBitmap;
const char    * pText;
const char    * pExplanation;
} BITMAP_ITEM;
/*********************************************************************
*
*    _aBitmapItem
*/
const BITMAP_ITEM _aBitmapItem[] = {
{ IDC_computer, "computer", "computer" },
// { IDC_internet, "Internet", "internet" },
// { IDC_set ,"setting,","device set"},
// { IDC_rubbish, "rubbish", "rubbish" },
// { IDC_calculate,"calculate","calculater"},
// { IDC_music, "music", "music player" },
{ IDC_clock,"clock","clock"},
// { IDC_map,"map","map"},
// { IDC_message,"message","message"},
// { IDC_movie,"movie","movie"},
// { IDC_phone,"phone","phone"},
};

static U8 *_acBuff;
static int _GetData(void * p, const U8 ** ppData, unsigned NumBytesReq, U32 Off) {

  UINT NumBytesRead=0;
OS_CPU_SR cpu_sr=0;
// U8    * pData;

// phFile = (HANDLE *)p;
  //
  // Set file pointer to the required position
  //
// SetFilePointer(*phFile, Off, 0, FILE_BEGIN);
  //
  // Read data into buffer
  //
// ReadFile(*phFile, pData, NumBytesReq, &NumBytesRead, NULL);
if(NumBytesReq >2000)
{
      NumBytesReq = 2000;
}
OS_ENTER_CRITICAL();
printf("移动读取指针%d\r\n",f_lseek((FIL*)p,Off));
printf("读取数据%d\r\n",f_read((FIL*)p,_acBuff,NumBytesReq,&NumBytesRead));
OS_EXIT_CRITICAL();
printf("NumBytesRead=%d\r\n",NumBytesRead);
  //
  // Return number of available bytes
  //
*ppData= _acBuff;
  return NumBytesRead;
}

/*********************************************************************
*
*    _DrawPNG_file
*
* Function description
* Draws a PNG file from a file system
*/
static void _DrawBMP_file(const char * sFilename,int x0,int y0) {
FIL file;
FRESULT res;
GUI_HMEM hmem;

// int xSize;
// int ySize;
// int w;
// int h;
// int xPos;
// int yPos;

printf("打开文件\n");

res = f_open(&file,sFilename,FA_READ|FA_OPEN_EXISTING);
printf("已打开文件:%d\n",res);
if(res == FR_OK)
{
      hmem    = GUI_ALLOC_AllocNoInit(4000);
      _acBuff  = GUI_ALLOC_h2p(hmem);
      puts("打开文件成功");
      GUI_DispDecMin(res);
      puts("开始绘制");
      GUI_BMP_DrawEx(_GetData, &file, x0, y0);
      puts("绘制完成");
      f_close(&file);
      GUI_ALLOC_Free(hmem);
}

}
static void _cbDeskTopCallBack(WM_MESSAGE * pMsg)
{
// USER START (Optionally insert additional variables)
// USER END
int Id;
int NCode;
int Sel;
// int textmodeold;
switch (pMsg->MsgId) {
case WM_INIT_DIALOG:
      //
      // Initialization of 'Window'
      //

      // USER START (Optionally insert additional code for further widget initialization)
      // USER END

      break;
case WM_NOTIFY_PARENT:
      Id = WM_GetId(pMsg->hWinSrc);    // Id of widget
      NCode = pMsg->Data.v;
//       textmodeold=GUI_SetTextMode(GUI_TEXTMODE_TRANS);
      switch (Id)
      {
         case GUI_ID_ICONVIEW0:
            switch (NCode)
            {
            case WM_NOTIFICATION_SEL_CHANGED:
                  Sel = ICONVIEW_GetSel(pMsg->hWinSrc);
                  GUI_DispStringAt(_aBitmapItem[Sel].pExplanation,200,200);
                  break;
            case WM_NOTIFICATION_CLICKED:
                  Sel = ICONVIEW_GetSel(pMsg->hWinSrc);
                  GUI_DispStringAt("YOU clicked icon :",200,250);
                  GUI_DispDecMin(Sel);
                  break;
            case WM_NOTIFICATION_RELEASED:
                  Sel = ICONVIEW_GetSel(pMsg->hWinSrc);
                  GUI_DispStringAt("YOU released icon :", 200, 280);
                  GUI_DispDecMin(Sel);
                  break;
            case WM_NOTIFICATION_MOVED_OUT:
                  Sel = ICONVIEW_GetSel(pMsg->hWinSrc);
                  GUI_DispStringAt("YOU moveout icon :", 200, 300);
                  GUI_DispDecMin(Sel);
                  break;
            default:
                  break;
            }
         default:
            break;
      }
// GUI_SetTextMode(textmodeold);
      break;
case WM_PAINT:
// GUI_DrawBitmap(IDC_BKimage,0,0);
_DrawBMP_file("0:/girl.bmp",0,0);
      break;
      // USER START (Optionally insert additional message handling)
      // USER END
default:
      WM_DefaultProc(pMsg);
      break;
}
}

WM_HWIN ShowDeskTop(void)
{
WM_HWIN hWin;
int i;
WM_SetDesktopColor(GUI_BLACK);
WM_SetCallback(WM_HBKWIN, _cbDeskTopCallBack);

hWin = ICONVIEW_CreateEx(0, 0, 800, 480,
      WM_HBKWIN, WM_CF_SHOW | WM_CF_HASTRANS,
      0, GUI_ID_ICONVIEW0, 85, 85);
ICONVIEW_SetFont(hWin,&GUI_Font16_1);
for (i = 0; i < GUI_COUNTOF(_aBitmapItem); i++) {
      /*
      * Add icons to the widget
      */
      ICONVIEW_AddBitmapItem(hWin, _aBitmapItem.pBitmap, _aBitmapItem.pText);
}
return WM_HBKWIN;
}