Author Topic: Questions or comments about the PNG Animation format  (Read 4450 times)

Patrice Terrier

  • Administrator
  • *****
  • Posts: 1559
    • zapsolution
Questions or comments about the PNG Animation format
« on: October 27, 2016, 12:07:38 pm »
This is the place to post questions or comments about the "PNG Animation" project posted into the "64-bit SDK programming" section.

...
« Last Edit: October 27, 2016, 03:03:10 pm by Patrice Terrier »
Patrice
(Always working with the latest Windows version available...)

Michael Lobko-Lobanovsky

  • Administrator
  • *****
  • Posts: 1380
Re: Questions or comments about the PNG Animation format
« Reply #1 on: October 28, 2016, 02:53:50 pm »
How come the PowerBASIC version of RedHawk.exe doesn't display GDImage.dll's nag screen?
Mike
(3.6GHz Intel Core i5 Quad w/ 16GB RAM, nVidia GTX 1060Ti w/ 6GB VRAM, Windows 7 Ultimate Sp1)

Michael Lobko-Lobanovsky

  • Administrator
  • *****
  • Posts: 1380
Re: Questions or comments about the PNG Animation format
« Reply #2 on: October 28, 2016, 03:04:32 pm »
The drawback of this format, is that if you load it inside of a standard graphic application you will get only the first frame,
and if ever you save it, you will loose the animation, because the "2nd png" section, and the "footer" will be missing.

You can also regard it as an advantage to safeguard the copyright and to promote the dedicated viewer. :)
Mike
(3.6GHz Intel Core i5 Quad w/ 16GB RAM, nVidia GTX 1060Ti w/ 6GB VRAM, Windows 7 Ultimate Sp1)

Patrice Terrier

  • Administrator
  • *****
  • Posts: 1559
    • zapsolution
Re: Questions or comments about the PNG Animation format
« Reply #3 on: October 28, 2016, 06:02:35 pm »
He He, looks like there is a back door ;)

And, YES you are right, this is also an advantage ...

I have written a command line utility to create a PNG animation directly from a GIF animated.
But most of the time i prefer to rework/resize first the resulting PNG into Photoshop, before creating the animation itself.

...




Patrice
(Always working with the latest Windows version available...)

Paul Yuen

  • Newbie
  • *
  • Posts: 1
Re: Questions or comments about the PNG Animation format
« Reply #4 on: November 02, 2016, 09:04:30 pm »
Hi Patrice

How to run GIFtoPNG.exe ?  When I tried running it, it display an error message as shown in the attachment

How do I select a Gif file so that it can produce the png file ?
Thanks

Patrice Terrier

  • Administrator
  • *****
  • Posts: 1559
    • zapsolution
Re: Questions or comments about the PNG Animation format
« Reply #5 on: November 02, 2016, 09:42:27 pm »
Select a GIF animated file with the Windows Explorer, and use drag and drop of the image onto the GIFtoPNG.exe name.

Because this exe is a command line utility only.

...
« Last Edit: November 02, 2016, 09:44:52 pm by Patrice Terrier »
Patrice
(Always working with the latest Windows version available...)

Patrice Terrier

  • Administrator
  • *****
  • Posts: 1559
    • zapsolution
PNGanim utility updated
« Reply #6 on: November 10, 2016, 06:44:59 pm »
I just post a new version of the PNGanim.exe utility to display and adjust the animation speed of ani_PNG FILES.

New feature:
- Frame count display

Fix:
- To avoid unespected resizing when moving the PNGanim.exe window to the edges.
Handling of WM_MOVING message has been added, to keep the window within the bounds of the working area

Code: [Select]
    case WM_GETMINMAXINFO:
         pMM = (MINMAXINFO*) lParam;
         pMM->ptMinTrackSize.x = gP.MinTrackSizeW;
         pMM->ptMinTrackSize.y = gP.MinTrackSizeH;
         return 0;

    case WM_MOVING: // Keep the window into the working area
         hMonitor = MonitorFromWindow(hWnd, MONITOR_DEFAULTTONEAREST);
         lpr = (RECT*) lParam;
         if (lpr->top < 0) { lpr->top = 0; }
         lpr->right = lpr->left + gP.MinTrackSizeW;
         lpr->bottom = lpr->top + gP.MinTrackSizeH;
         tmi.cbSize = sizeof(tmi);
         if (GetMonitorInfo(hMonitor, &tmi)) {
             if (lpr->bottom > tmi.rcWork.bottom) {
                 lpr->bottom = tmi.rcWork.bottom;
                 lpr->top = lpr->bottom - gP.MinTrackSizeH;
             }
         }
         return 1;

You can get the new version there.

If you have questions or comments about it, please post them here.

...
« Last Edit: November 10, 2016, 06:48:03 pm by Patrice Terrier »
Patrice
(Always working with the latest Windows version available...)

Patrice Terrier

  • Administrator
  • *****
  • Posts: 1559
    • zapsolution
Re: Questions or comments about the PNG Animation format
« Reply #7 on: March 16, 2017, 10:34:04 pm »
Quote
you can also use this Link for create Animated Png and more

In my png animation format the first frame is kept unchangend, the real header being stored at the end of the file.

I looked first at the "apng" format, but found it over complicated, this is the reason why i wrote mine to act as a replacement for my .ski format, and to be able to read it directly with the GDIPLUS api.

I have also my own set of tools to create them, inluding the hability to convert directly from a GIF animated file.
For further details see this thread
http://www.objreader.com/index.php?topic=69.0
« Last Edit: March 17, 2017, 11:21:44 am by Patrice Terrier »
Patrice
(Always working with the latest Windows version available...)