Convert this function to load from Resource rather than File

Hello gurus,

You can see following function (I got from codeproject as far I remember), loads from an external file. What I want is have same fucntion load from resources, I pass it resource ID as DWORD and it simply loads from resources not an external file. something like
HBITMAP LoadImageResource(DWORD resID);


I am sure for winapi gurus it is task of a few minutes. Any help is apprecited.

Please, it is urgent:

Code:

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HBITMAP LoadImageFile(char *FileName)  {
  // Use IPicture stuff to use JPG / GIF / BMP files
  IPicture* p;
  IStream* s;
  IPersistStream* ps;
  HGLOBAL hG;
  void* pp;
  FILE* fp;


  // Read file in memory
  fp = fopen(FileName,"rb");
  if (!fp)
          return NULL;
       

  fseek(fp,0,SEEK_END);
 
  int fs = ftell(fp); //get filesize
  fseek(fp,0,SEEK_SET);
  hG = GlobalAlloc(GPTR,fs);
  if (!hG)  {
      fclose(fp);
      return NULL;
  }


     
  pp = (void*)hG;
  fread(pp,1,fs,fp);
  fclose(fp);
       

  // Create an IStream so IPicture can
    CreateStreamOnHGlobal(hG,false,&s);
  if (!s) {
      GlobalFree(hG);
      return NULL;
  }


  OleLoadPicture(s,0,false,IID_IPicture,(void**)&p);

  if (!p) {
      s->Release();
      GlobalFree(hG);
      return NULL;
  }
  s->Release();
  GlobalFree(hG);

  HBITMAP hB = 0;
  p->get_Handle((unsigned int*)&hB);

  // Copy the image. Necessary, because upon p's release,
  // the handle is destroyed.
  HBITMAP hBB = (HBITMAP)CopyImage(hB,IMAGE_BITMAP,0,0,LR_COPYRETURNORG);

  p->Release();
  return hBB;
}

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I do not want to use LoadBitmap or LoadImage in this regard, please. If possible, I want exactly same function but reading resources not external file.

waiting for kind quick reply. :)


regards

Quote:

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Originally Posted by Ali Imran

I do not want to use LoadBitmap or LoadImage in this regard, please.

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I do not quite understand why those won't work for you when they are written for exactly the purpose you have in mind.

Quote:

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I do not quite understand why those won't work for you when they are written for exactly the purpose you have in mind.

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becuase none of these functions load JPEG or GIF.

Anyway ? I can get this function done please :)

regards

Here's mine:
http://www.winapizone.net/tutorials/...omresource.php

1. it reports error as unknown identifier 'hBmp' on following line:

HBITMAP bitmap = (HBITMAP)CopyImage(hBmp, IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);

2. Would this function work if I discard the second argument, and pass RT_RCDATA as resource type?

3. Am I allowed to use it anyway I want ?

regards

Sorry for the late answer.

1) Yes, i just corrected the code.

2) the second argument depends on how you include the file in the .rc file. FindResource requires the data type - after all, even LoadImage (which IMHO uses FindResource) requires the image type (IMAGE_ICON, IMAGE_BITMAP or IMAGE_CURSOR). So, if you use JPEG or GIF or PNG or whatever as type when you declare in the resource, that's what you should use when loading the image. For example:

Code:

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//in the .rc file
ID_JPEG_IMAGE JPEG "image.jpg" //this will require _T("JPEG") as type
ID_JPEG_IMAGE GIF "image.gif" //this will require _T("GIF") as type

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You can still try to use RT_RCDATA. This function was coded long ago, and i don't remember why i asked to pass the resource type..

3) Well, where do you want to use it?

1. thanks

2. tried RT_RCDATA but does not work

3. For free GUI library RAD C++ 1.2.

regards

Quote:

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Originally Posted by Ali Imran

3. For free GUI library RAD C++ 1.2.

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No problem. If you want, put a link to the page in the "credits".