grd.c

grd.c - Proportional Grid Layout Engine

grd.c is a minimalist C library and CLI for computing proportional grid splits. It provides a passive layout engine for hierarchical boxes and splits, designed as a composable native primitive for the KaisarCode ecosystem.

CLI

Compute proportional splits for a given root area and set of weights.

Examples

Split a 1920x1080 area into three rows with 1:2:1 proportions:

./bin/x86_64/linux/grd split -w 1920 -H 1080 -k row -W "1 2 1"

Split an 800x600 area into four equal columns with a 4px gap:

./bin/x86_64/linux/grd split -w 800 -H 600 -k col -W "1 1 1 1" -g 4

Parameters

Flag	Description
`-w <n>`	Root width in pixels (required)
`-H <n>`	Root height in pixels (required)
`-k row\	col`	Split direction (default: row)
`-W <weights>`	Space or comma separated weights (required)
`-g <n>`	Gap between children in pixels (default: 0)
`-m <n>`	Minimum child size in pixels (default: 1)
`-h`, `--help`	Show help and usage
`-v`, `--version`	Show version

Output

One line per child box, in the format index x y w h:

0 0 0 1920 270
1 0 270 1920 540
2 0 810 1920 270

Public API

#include "grd.h"

kc_grd_box_t *root = kc_grd_box_new();
kc_grd_split_t *s = kc_grd_split_set(root, KC_GRD_ROW);

kc_grd_split_add(s, kc_grd_box_new(), 1.0f);
kc_grd_split_add(s, kc_grd_box_new(), 2.0f);

kc_grd_box_bounds(root, 0, 0, 1920, 1080);
kc_grd_box_layout(root);

kc_grd_box_free(root);

Lifecycle

kc_grd_box_new() - allocates a new box. The caller owns the box until it is added to a split.
kc_grd_split_set() - attaches a split engine to a box.
kc_grd_split_add() - adds a child box to a split. Ownership of the child transfers to the parent box.
kc_grd_box_free() - recursively releases a box and all its descendants.

Build

Compiled artifacts are generated under bin/{arch}/{platform}/ for the host architecture running the build.

make clean && make

Multiarch Builds

The project is prepared to build artifacts for multiple architectures under bin/{arch}/{platform}/. A plain make builds only the current host architecture, while the targets below build the full matrix or a specific target.

make all
make x86_64/linux
make x86_64/windows
make i686/linux
make i686/windows
make aarch64/linux
make aarch64/android
make armv7/linux
make armv7/android
make armv7hf/linux
make riscv64/linux
make powerpc64le/linux
make mips/linux
make mipsel/linux
make mips64el/linux
make s390x/linux
make loongarch64/linux

Beta Notice

This is a beta project tested only on Debian x86_64. It was created out of a personal need for these libraries, but no guarantees are provided regarding its stability or future support. You are free to test it, use it, and modify it as you please.

If you'd like to reach out, you can send an email to [email protected]. Please note that I do not accept pull requests; the goal is to avoid long-term dependency on platforms like GitHub, and I do not maintain fixed infrastructure to guarantee long-term stability for these projects.

Repo

You can download the repository and read the most up-to-date documentation directly from its official source.

GitHub: kaisarcode/grd.c

License

This project is distributed under the GNU General Public License version 3 (GPLv3).