1xBRZ upscaling commandline tool 2=============================== 3 4Copyright (c) 2014 Przemysław Grzywacz <nexather@gmail.com> 5 6This file is part of xbrzscale. 7 8xbrzscale is free software: you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation, either version 3 of the License, or 11(at your option) any later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program. If not, see <http://www.gnu.org/licenses/>. 20 21 22 23Overview 24-------- 25 26This tool allows you to scale your graphics with xBRZ algorithm, see http://en.wikipedia.org/wiki/Image_scaling#xbr_family 27 28This is an example of what xBRZ can do: 29 30 31 32 33External code 34------------- 35 36The following external code is included in this repository: 37 38* https://sourceforge.net/projects/xbrz/files/xBRZ/ - xBRZ implementation 39 40Dependencies 41------------ 42 43The following dependencies are needed to compile xbrzscale: 44 45* libsdl2-dev 46* libsdl2-image-dev 47 48Under OSX they can be installed using macports 49 50* port install libsdl2_image 51* port install libsdl2 52 53Some additional libraries are needed. I'm sure you'll figure it out. 54 55If you need SDL1.2 support, check sdl1.2 git branch. 56 57 58Compiling 59--------- 60 61Just run `make` and you should end up with a binary called `xbrzscale`. 62 63The makefile will probably work only on linux and OSX, but it is simple enough to be ported to other platforms. 64 65 66Usage 67----- 68 69 `xbrztool scale_factor input_image output_image` 70 71* `scale_factor` - Controls how much your image should be scaled. It should be an integer between 2 and 5 (inclusive). 72* `input_image` - Input image is the filename of the image you want to scale. Image format can be anything that SDL_image supports. 73* `output_image` - Filename where the scaled image should be saved. The only supported format is PNG! 74 75Please note I only tested the scaling on 32bit RGBA PNGs, I have no idea if this will work with 8bit indexed images. 76 77 78 79 80
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