kichikuou
da5ac4a26c
This adds `USE_GLES` compile-time flag. If it's defined, gfx_init() requests an OpenGL ES >=3.0 context. This also makes the following changes to make it work with OpenGL ES: - The USE_GLES flag also switches shader's #version directive, which is now provided separately from the .glsl file. - Implicit conversion between int and float is not supported in GLSL ES. - Use GL_RGB in gfx_copy_main_surface. Because main_surface is in GL_RGB format, using GL_RGBA generates GL_INVALID_OPERATION in OpenGL ES.
xsystem4
xsystem4 is an implementation of AliceSoft's System 4 game engine for unix-like operating systems.
NOTE: This is a work in progress. I am focusing primarily on the Japanese version of Sengoku Rance (and by extension, the English fan translation) which is currently more or less playable. Some other games from the same era may also work, but I have not done any significant testing on them so breakage is likely.
Building
First install the dependencies (corresponding Debian package in parentheses):
- chibi-scheme [optional, for debugger]
- bison (bison)
- cglm (libcglm-dev) [optional, fetched by meson if not available]
- flex (flex)
- meson (meson)
- libffi (libffi-dev)
- libpng (libpng-dev)
- libturbojpeg (libturbojpeg0-dev)
- libwebp (libwebp-dev)
- SDL2 (libsdl2-dev)
- SDL2_mixer (libsdl2-mixer-dev)
- SDL2_ttf (libsdl2-ttf-dev)
- zlib (zlib1g-dev)
Then fetch the git submodules,
git submodule init
git submodule update
(Alternatively, pass --recurse-submodules when cloning this repository)
Then build the xsystem4 executable with meson,
mkdir build
meson build
ninja -C build
Finally install it to your system (optional),
ninja -C build install
Running
You can run a game by passing the path to its game directory to the xsystem4 executable,
build/src/xsystem4 /path/to/game_directory
Alternatively, run xsystem4 from within the game directory,
cd /path/to/game_directory
xsystem4