ObjReader Community

SDK programming => 64-bit SDK programming => Topic started by: Patrice Terrier on July 23, 2025, 09:52:27 am

Title: APNG Viewer
Post by: Patrice Terrier on July 23, 2025, 09:52:27 am

Reading and Writing APNG (Animated PNG) Made Simple

Handling APNG files — both reading and writing — has always been a challenge.
This clean application provides a streamlined solution for both.

💡 Usage 
Just drag and drop any image onto the window.
The application automatically detects the format and processes it accordingly:

• Native APNG files
  
• GDImage PNG animations
  
• Horizontal stride images (multi-frame strip in a single PNG)
  

The animation is parsed, displayed, and optionally re-encoded using the new internal APNG API.

🛠️ What’s included 
The complete 64-bit Visual Studio 2022 source code is attached to this post.
It demonstrates how to load, display, convert, and rebuild animated PNGs with precision and full control.

Flowchart overview

(http://www.objreader.com/download/images/diagram.jpg)


And a working APNG example

(http://www.objreader.com/download/images/New_APNG.png)

Title: Re: APNG Viewer
Post by: Patrice Terrier on July 24, 2025, 02:22:51 pm

The project has been updated to link with TCLib.lib to reduce the size of the binary EXE down to 13 Kb, including the icon!

The FreeBasic 64-bit version is here. (https://www.freebasic.net/forum/viewtopic.php?t=33253)