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xBRZ upscaling commandline tool

Copyright (c) 2020 Przemysław Grzywacz [email protected]

This file is part of xbrzscale.

xbrzscale is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Overview

This tool allows you to scale your graphics with xBRZ algorithm, see https://en.wikipedia.org/wiki/Pixel-art_scaling_algorithms#xBR_family

External code

The following external code is included in this repository:

Dependencies

The following dependencies are needed to compile xbrzscale:

  • libsdl2-dev
  • libsdl2-image-dev

On Windows said dependencies can be installed by doing the following:

Under OSX they can be installed using macports

  • port install libsdl2_image
  • port install libsdl2

Some additional libraries are needed. I'm sure you'll figure it out.

If you need SDL1.2 support, check sdl1.2 git branch.

Compiling

For Mac and Linux:

run make and you should end up with a binary called xbrzscale.

For Windows:

run mingw32-make -f Makefile-win and you should end up with a binary called xbrzscale.exe

Usage

`xbrztool scale_factor input_image output_image`
  • scale_factor - Controls how much your image should be scaled. It should be an integer between 2 and 5 (inclusive).
  • input_image - Input image is the filename of the image you want to scale. Image format can be anything that SDL_image supports.
  • output_image - Filename where the scaled image should be saved. The only supported format is PNG!

Please note I only tested the scaling on 32bit RGBA PNGs, I have no idea if this will work with 8bit indexed images.

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Image upscaling commandline tool using xBRZ algorithm

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