C Programming
 
Forums: » Register « |  User CP |  Games |  Calendar |  Members |  FAQs |  Sitemap |  Support | 
User Name:
Password:
Remember me
Go Back   Dev Shed Forums > Programming Languages > C Programming
Reload this Page

IJG: Jpeg to HBITMAP or JPeg use in general

Discuss IJG: Jpeg to HBITMAP or JPeg use in general in the C Programming forum on Dev Shed.
IJG: Jpeg to HBITMAP or JPeg use in general C programming forum discussing all C derivatives, including C#, C++, Object-C, and even plain old vanilla C. These languages are low level languages, and used on projects such as device drivers, compilers, and even whole computer operating systems.

Reply
Add This Thread To:
  Del.icio.us   Digg   Google   Spurl   Blink   Furl   Simpy   Y! MyWeb 
« Previous Thread | Next Thread »  
Thread Tools Search this Thread Rate Thread Display Modes
 
Unread Dev Shed Forums Sponsor:
  #1  
Old March 13th, 2003, 04:49 PM
grunt grunt is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 6 grunt User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
IJG: Jpeg to HBITMAP or JPeg use in general
Hello. First of all, I have been making use of the excellent tutorials here for some time.. but Im new to this forum. I read the rules thread and did a search on this topic.. so I apologize if I'm missing something obvious.

I am new to the winAPI.. I am working entirely in C.. and have been doing custom shaped windows and skinning them with bmp's for this project I am doing. But I would really like to reduce the size of the exe by using a jpeg resource instead of a bitmap.

I've downloaded and compiled the IGJ library.. and there is code in there I could use.. but Im having difficulties getting the image data into an HBITMAP. I have searched google high and low and am having problems finding any built in library.. and most '3rd party' libraries involve 2D or 3D graphics manipulation.. licensing fee's, demo versions.. ect.

I refuse to believe I am the first individual that has ever loaded a jpg into a windows program , and I feel retarded that I can't figure out how everyone is doing it.

If someone could just point me in the right direction I would greatly appreciate it. Especially if I could stick with plain old C. We are trying to save every byte possible so we can email these programs to customers.

Thanks in advance.
Reply With Quote
  #2  
Old March 13th, 2003, 05:36 PM
Gmorphus Gmorphus is offline
Contributing User
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Sep 2001
Location: ISRAEL
Posts: 35 Gmorphus User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 7
Send a message via ICQ to Gmorphus
ok, you should understand some basics (and please correct me if i'm wrong):
- to load a bitmap to a reasource is as expensive as reading it from a file, or even more. (the size of the exe)
- if you will load the bitmap from a file at run time you decrease the size of the exe but you will have to send the bmp file together with the exe.

if you are not familiar with the API of reading from file i can explain.
basically, to load an image from a file use LoadImage()
(also relevant to pure C)
__________________
"Gravitation can NOT be responsible for people falling in Love"
(one of the most significant characters in the history, can you guess?)

Gmorph.
Reply With Quote
  #3  
Old March 13th, 2003, 05:39 PM
grunt grunt is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 6 grunt User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
Yeah.. I can load the image from a file just fine. I included it in the exe file for ease of distribution. The difficulty I am having is using a jpg file.
Reply With Quote
  #4  
Old March 13th, 2003, 05:50 PM
Gmorphus Gmorphus is offline
Contributing User
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Sep 2001
Location: ISRAEL
Posts: 35 Gmorphus User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 7
Send a message via ICQ to Gmorphus
i think that if the Jpeg is valid it should work well with HBITMAP but refer to MSDN for deeper description.
try:
BITMAP_FILE_HEADER
BITMAP_INFO
...
Reply With Quote
  #5  
Old March 14th, 2003, 12:47 AM
M.Hirsch M.Hirsch is offline
Contributing User
Dev Shed God 1st Plane (5500 - 5999 posts)
  
Join Date: Oct 2000
Location: Back in the real world.
Posts: 5,969 M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level) 
Time spent in forums: 1 Month 1 Day 22 h 39 m 55 sec
Reputation Power: 184
starting with W2K, jpegs are natively supported by the GDI. i.e. you should be able to load them directly via LoadBitmap(), but i never tried...

For making my programs work with all Windozes, I always use intelīs(? - the one that comes with Borland C++ Builder) jpeg library. There you can load a jpeg from a file and draw() them to any HDC. (i.e. also to a Bitmap or DIB) i donīt have any code around as i am at home, but if you can ask a more specific question, iīll gladly try to help.

M.
__________________
--
Manuel Hirsch - Linux, FreeBSD, programming, administration articles, tutorials and more.
Reply With Quote
  #6  
Old March 14th, 2003, 01:28 AM
M.Hirsch M.Hirsch is offline
Contributing User
Dev Shed God 1st Plane (5500 - 5999 posts)
  
Join Date: Oct 2000
Location: Back in the real world.
Posts: 5,969 M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level) 
Time spent in forums: 1 Month 1 Day 22 h 39 m 55 sec
Reputation Power: 184
UPDATE: I found my sources...
I just found the sources on a backup CD. I am using IJGīs library too.

using jpeg_read_scanlines(), you can decompress the jpeg line by line to a bitmapīs bitmap-data.

the full process is quite complicated and many lines. And as i am using Delphi version and not C, i am not willing to translate all that right now. But i could post the relevant delphi code if you want... just tell me.
Reply With Quote
  #7  
Old March 14th, 2003, 10:39 AM
grunt grunt is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 6 grunt User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
It looks like Intel isn't offering their jpg package anymore. Its now part of thier IPP package you have to purchase.

So IJG it is. If I'm going to work scanline to scanline, don't I need to invert the image? That is.. aren't bmp's stored from bottom to top?
Reply With Quote
  #8  
Old March 14th, 2003, 11:02 AM
3dfxMM 3dfxMM is offline
Contributing User
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Aug 2002
Posts: 266 3dfxMM User rank is Sergeant (500 - 2000 Reputation Level)3dfxMM User rank is Sergeant (500 - 2000 Reputation Level)3dfxMM User rank is Sergeant (500 - 2000 Reputation Level)3dfxMM User rank is Sergeant (500 - 2000 Reputation Level)3dfxMM User rank is Sergeant (500 - 2000 Reputation Level) 
Time spent in forums: 3 Days 19 h 27 m 59 sec
Reputation Power: 13
I think the native support of JPEG images only works with a printer DC.
Reply With Quote
  #9  
Old March 14th, 2003, 01:00 PM
M.Hirsch M.Hirsch is offline
Contributing User
Dev Shed God 1st Plane (5500 - 5999 posts)
  
Join Date: Oct 2000
Location: Back in the real world.
Posts: 5,969 M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level) 
Time spent in forums: 1 Month 1 Day 22 h 39 m 55 sec
Reputation Power: 184
3dfxMM: possible. as said, i never tested it since my software needs to work with older windozes too.

grunt:
Quote:
don't I need to invert the image? That is.. aren't bmp's stored from bottom to top?


so? how hard would it be to read the scanlines top to bottom and write bottom to top?

But i canīt remember this strange behaviour on BMPs, could be that Delphi hides it from the user though...
Reply With Quote
  #10  
Old March 14th, 2003, 01:34 PM
grunt grunt is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 6 grunt User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
Quote:
so? how hard would it be to read the scanlines top to bottom and write bottom to top?


I wasn't commenting on difficulty.. but trying to clarify what would need to be done. I recall some of the IJG code reversing the scanlines for a bmp conversion.. and difficult or not, its somewhat important to get the pixel data correct.

I think I can organize thier code well enough. If there aren't well known libraries or methods.. I guess my question becomes, how would one create/modify an HBITMAP with this data?
Reply With Quote
  #11  
Old March 14th, 2003, 01:49 PM
M.Hirsch M.Hirsch is offline
Contributing User
Dev Shed God 1st Plane (5500 - 5999 posts)
  
Join Date: Oct 2000
Location: Back in the real world.
Posts: 5,969 M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level)M.Hirsch User rank is First Lieutenant (10000 - 20000 Reputation Level) 
Time spent in forums: 1 Month 1 Day 22 h 39 m 55 sec
Reputation Power: 184
Quote:
its somewhat important to get the pixel data correct.

of course it is
Quote:
how would one create/modify an HBITMAP with this data?

Just as you would do with any other bitmap too...
Code:
pseudocode:
ptr=CreateBitmap(width, height)
bmpsize=width*height*bpp // bpp=bytes per pixel
ptr+=sizeof(BITMAP_INFO)+bmpsize;

for (i=0;i<height;i++)
  jpeg_read_scanlines(jc->d, ptr-i*width*bpp, 1);

not syntax-checked nor logic-checked. probably needs several "+/-1" somewhere. probably all wrong and will blow up your whole PC. i take no responsibility for nothing

Anyone got the time for making real code of this?
Reply With Quote
  #12  
Old April 4th, 2003, 03:11 PM
grunt grunt is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 6 grunt User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
well.. I found an easier way than converting the image scanline by scanline:

PHP Code:
 HBITMAP ReadJpegFile( LPSTR pFile )
   {
   HANDLE hFile;
   HBITMAP hBmp;
   DWORD dwSize;
   DWORD dwRead;
   HGLOBAL hMemJpeg;
   LPSTREAM lpStream;
   OLE_HANDLE hJpegBmp;
   HRESULT hr;
   LPPICTURE lpPicture = NULL;
   void *pMemJpeg;

   /* Open the file and get the size. */
   if((hFile = CreateFile(pFile, GENERIC_READ, FILE_SHARE_READ,
     NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
     return NULL;
   if((dwSize = GetFileSize(hFile, NULL)) == 0xFFFFFFFF)
      {
      CloseHandle(hFile);
      return NULL;
      }

   /* Allocate space for file, read it in, and then close the file again. */
   if((hMemJpeg = GlobalAlloc(GMEM_MOVEABLE, dwSize)) == NULL)
      {
      CloseHandle(hFile);
      return NULL;
      }
   if((pMemJpeg = GlobalLock(hMemJpeg)) == NULL)
      {
      CloseHandle(hFile);
      GlobalFree(hMemJpeg);
      return NULL;
      }
   if(!ReadFile(hFile, pMemJpeg, dwSize, &dwRead, NULL))
      {
      CloseHandle(hFile);
      GlobalFree(hMemJpeg);
      return NULL;
      }
   CloseHandle(hFile);
   GlobalUnlock(hMemJpeg);

   /* Create the stream and load the picture. */
   if((hr = CreateStreamOnHGlobal(hMemJpeg, TRUE, &lpStream)) != S_OK)
      {
      GlobalFree(hMemJpeg);
      return NULL;
      }
   if(OleLoadPicture(lpStream, dwSize, FALSE, &IID_IPicture, &lpPicture) != S_OK)
      {
      GlobalFree(hMemJpeg);
      lpStream->lpVtbl->Release(lpStream);
      return NULL;
      }

   /* Get the handle to the image, and then copy it. */
   if((lpPicture->lpVtbl->get_Handle(lpPicture, &hJpegBmp)) != S_OK)
      {
      GlobalFree(hMemJpeg);
      lpStream->lpVtbl->Release(lpStream);
      lpPicture->lpVtbl->Release(lpPicture);
      return NULL;
      }
   if((hBmp = CopyImage((HANDLE *) hJpegBmp, IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG)) == NULL)
      {
      GlobalFree(hMemJpeg);
      lpStream->lpVtbl->Release(lpStream);
      lpPicture->lpVtbl->Release(lpPicture);
      return NULL;
      }

   /* Free the original image and memory. */
   GlobalFree(hMemJpeg);
   lpStream->lpVtbl->Release(lpStream);
   lpPicture->lpVtbl->Release(lpPicture);
   return hBmp;
} /* End of ReadJpegFile(). */ 




But now Im having issues loading the image from my resources instead of an external file. Im really not very good with the winAPI. Any ideas?
Reply With Quote
  #13  
Old April 5th, 2003, 01:08 PM
Doctor - A Doctor - A is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Mar 2003
Posts: 11 Doctor - A User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
MS GDI+ will be very helpful to you.
It works with jpg, png, gif etc.
It is free.

download link:

http://www.microsoft.com/downloads/...&DisplayLang=en
Reply With Quote
  #14  
Old April 14th, 2003, 08:53 AM