GT7 IMAGE TO SVG - WINDOWS DESKTOP EDITION
Version 1.0 | 64-bit Windows 10 / Windows 11

QUICK START
1. Extract the downloaded ZIP (right-click > Extract All).
2. Open the GT7_SVG_Converter folder.
3. Double-click GT7SVGConverter.exe.
4. Click Open image, or drag an image onto the app.
5. Choose your colours, detail and background settings.
6. Click Convert, inspect the SVG preview, then click Save SVG.

This is a native Windows executable. No browser, Python, .NET setup,
additional application packages or administrator access are required.
The app is portable: move the EXE to any folder and run it from there.
Remove that file to remove the app. Nothing is installed and no images
are sent over the internet.

Try the included Sample_Logo.png to check a transparent logo conversion.

FEATURES
- PNG, JPG/JPEG, BMP, GIF and TIFF input. GIF/TIFF use the first frame.
- Colour or black-and-white tracing, with 2 to 16 requested colours.
- Simple, Balanced and Fine starting detail.
- Optional removal of white, black or the dominant corner colour.
- Background tolerance, alpha cutoff and noise cleanup controls.
- Side-by-side image and vector previews on checkerboard, white or black.
- Automatic reduction of detail and colours when needed to fit the budget.
- SVG 1.1 with filled vector paths, including transparent holes.
- Exact file-size verification both after conversion and before saving.
- Successful exports have a maximum size of 14,900 bytes.
- Conversion runs in a background worker and can be cancelled.

UPLOAD TO GT7
Sign in at gran-turismo.com with the PSN account you use for GT7.
Use Decal Uploader to upload the saved SVG. In the game, open
Showcase > My Library > My Items to find your uploaded decal.
Official instructions:
https://www.gran-turismo.com/us/gt7/manual/liveryeditor/06

LIMITATIONS AND VALIDATION
Logos, lettering and flat artwork work best. Photos, gradients and fine
lettering may lose considerable detail at the 15 KB size limit. Inspect
the preview before using the file. Background removal affects matching
colours throughout the image, including enclosed areas. Transparency is
converted to an opaque/transparent cutout according to the alpha cutoff.
Save WebP images as PNG before opening them in this desktop edition.
Input images are limited to 25 MB and 50 million pixels.

The native engine was tested with transparent rings, lettering, flat
colours, diagonal islands, gradients, random colours, dense patterns,
tiny images and empty images. Exported SVGs were rendered independently
to check holes, masks, proportions and size. The engine inside this
Windows EXE was also executed through a Windows-ABI test bridge and
matched those checked outputs. Executable headers, DLL imports,
relocations and the application manifest were checked.

The Windows desktop window, image decoder and save dialogs have not
been run on an actual Windows computer in this build environment.
Live upload acceptance in a GT7 account has not been verified.

SOURCE AND LICENCE
The source folder contains the app and build scripts for inspection or
modification. Those files are not needed to run GT7SVGConverter.exe.
The software is provided under the MIT licence in LICENSE.txt.
It is not affiliated with Sony or Polyphony Digital.