IMPORTANT! THIS LIBRARY IS A WORK IN PROGRESS! ANYTHING CAN CHANGE AT ANY MOMENT WITHOUT ANY NOTICE! USE THIS LIBRARY AT YOUR OWN RISK!

Simple graphics library that does not have any dependencies and renders everything into the given memory pixel by pixel. Visit https://tsoding.org/olive.c/ to see some demos.

The name is pronounced as "olivets" which is a Ukrainian word for "pencil" ("олівець").

The truly reusable code is the one that you can simply copy-paste.

The library itself does not require any special building. You can simple copy-paste ./olive.c to your project and #include it. But you may want to build the binary tools for this project that are located in ./build/:

$ ./build.sh

This example uses stb_image_write.h to create the PNG image

// flag_jp.c
#define OLIVEC_IMPLEMENTATION
#include "olive.c"

#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"

#define WIDTH 900
#define HEIGHT 600

uint32_t pixels[WIDTH*HEIGHT];

int main(void)
{
    Olivec_Canvas oc = olivec_canvas(pixels, WIDTH, HEIGHT);
    // Taken from https://upload.wikimedia.org/wikipedia/en/9/9e/Flag_of_Japan.svg
    olivec_fill(oc, 0xFFFFFFFF);
    olivec_circle(oc, WIDTH/2, HEIGHT/2, 180, 0xFF2D00BC);

    const char *file_path = "flag_jp.png";
    if (!stbi_write_png(file_path, WIDTH, HEIGHT, 4, pixels, sizeof(uint32_t)*WIDTH)) {
        fprintf(stderr, "ERROR: could not write %s\n", file_path);
        return 1;
    }
    return 0;
}

$ ./build/test

If the expected behaviour of the library has changed in the way that breaks current test cases, you probably want to update them:

$ ./build/test record