EMWIN IMAGE 控件使用IMAGE_SetPNGEx()函数无法直接从SD卡中显示PNG图片

a1356409787 · 发表于 2019-9-26 18:15:00

下面是窗口的回调函数，初始化IMAGE控件

static FIL PNGFile;

static void _cbDialog(WM_MESSAGE * pMsg) {
  const void * pData;
  WM_HWIN    hItem;
  U32       FileSize;

char result;

  switch (pMsg->MsgId) {
  case WM_INIT_DIALOG:

hItem = WM_GetDialogItem(pMsg->hWin, ID_IMAGE_0);

result = f_open(&PNGFile,"/icon/setting/model.png",FA_READ); //打开文件

if((result != FR_OK) || (PNGFile.obj.objsize>PNGMEMORYSIZE)) printf("ERROR  %d \r\n",result);//文件打开错误或者文件大于JPEGMEMORYSIZE

IMAGE_SetPNGEx(hItem,PngGetData,&PNGFile);

f_close(&PNGFile); //关闭PNGFile文件

// 下面这种使用代码中图片数组的方式，可以正常使用

// pData = _GetImageById(ID_IMAGE_0_IMAGE_0, &FileSize);
// IMAGE_SetPNG(hItem, pData, FileSize);

break;

  default:
WM_DefaultProc(pMsg);
break;
  }
}

a1356409787 · 发表于 2019-9-26 18:15:01

static FIL PNGFile;

static void _cbDialog(WM_MESSAGE * pMsg) {
  const void * pData;
  WM_HWIN    hItem;
  U32       FileSize;

  switch (pMsg->MsgId) {

case WM_INIT_DIALOG:
      hItem = WM_GetDialogItem(pMsg->hWin, ID_IMAGE_0);
f_open(&PNGFile,"/icon/setting/model.png",FA_READ);       //打开文件
IMAGE_SetPNGEx(hItem,PngGetData,&PNGFile);
break;

case WM_DELETE:
f_close(&PNGFile);             //关闭PNGFile文件
  break;

  default:
WM_DefaultProc(pMsg);
break;
  }
}