An experimental gif encoder for Windows 10.

Related tags

Image processing giffun
Overview

giffun

An experimental gif encoder for Windows 10.

recording

Resources

Based on "Techniques for GPU-based Color Quantization" (2019) by Matthias Trapp, Sebastian Pasewaldt, and Jürgen Döllner.

Comments
  • Frame diffing

    Frame diffing

    Currently an entire frame is submitted each time, which still results in fairly chunky gifs. One solution could be to use a compute shader to determine a naive single update region.

    enhancement 
    opened by robmikh 2
  • Support window and full-display capture

    Support window and full-display capture

    A couple things have to happen to support this:

    • [x] Ensure image size is even
    • [x] Copy only what's within the content size for each Direct3D11CaptureFrame
    • [x] CLI to specify which window/display to capture
    enhancement 
    opened by robmikh 1
  • Artifacts on window resize

    Artifacts on window resize

    Resizing a window when recording will result in artifacts: recording

    We could fix this with an intermediate texture that is cleared before copying the content size of the Direct3D11CaptureFrame to the texture. Both the quantizer and the differ would run off of this new intermediate texture.

    bug 
    opened by robmikh 0
  • Pauses at the end of gifs don't get recorded

    Pauses at the end of gifs don't get recorded

    Because of the differ, we never end up recording the last frame of a gif if it contains a pause at the end. When the recording ends, we need to submit the last frame again with the last candidate frame's timestamp.

    bug 
    opened by robmikh 0
  • Eliminate wasteful copy

    Eliminate wasteful copy

    Currently we copy the entire frame and then run the differ, and then make another copy of only the changed contents. Theoretically, we could run both the quantizer and the differ and only copy out the parts that have changed.

    enhancement 
    opened by robmikh 0
  • ARM64 encoding issues

    ARM64 encoding issues

    The encoder behaves strangely on ARM64 devices (tested with a first gen Surface Pro X): recording

    Ignoring the strange colors in the initial frame (which would be fixed by a better default palette #4), subsequent frames are encoded as mostly white for some reason. I'm not sure if this is a bug in giffun or in the Qualcomm GPU driver...

    This is where I really wish PIX would be able to resolve the shader symbols ☹️

    bug 
    opened by robmikh 1
  • Better error messages for unsupported hardware or Windows version

    Better error messages for unsupported hardware or Windows version

    This project uses newer D3D11 features, we should detect unsupported hardware and provide an error message. Same for older versions of Windows that don't support all the Windows.Graphics.Capture features required.

    enhancement 
    opened by robmikh 0
Releases(v0.1.0-alpha)
Owner
Robert Mikhayelyan
Developer on the Windows Composition team. Loves all things Rust, C++, DirectX, C#, XAML, and of course, Composition.
Robert Mikhayelyan
GitHub
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