flecs + tigr

#include <flecs.h>
#include <tigr.h>

typedef struct Position {
    float x;
    float y;
} Position;

typedef struct RenderData {
    Tigr *src_buffer;
    Tigr *dest_buffer;
} RenderData;

typedef int32_t Speed;

// Move system
void Move(ecs_rows_t *rows) {
    ECS_COLUMN(rows, Position, p, 1);
    ECS_COLUMN(rows, Speed, s, 2);

    for (int i = 0; i < rows->count; i ++) {
        p[i].x += s[i] * rows->delta_time;
        p[i].y += s[i] * rows->delta_time;
    }
}

void Render(ecs_rows_t *rows) {
    ECS_COLUMN(rows, RenderData, r, 1);
    ECS_COLUMN(rows, Position, p, 2);

    for (int i = 0; i < rows->count; i ++) {
        tigrBlit(r[i].dest_buffer, r[i].src_buffer, p[i].x, p[i].y, 0, 0, 512, 512);
        tigrPrint(r[i].dest_buffer, tfont, 10, 20 + 10 * i, tigrRGB(0xff, 0xff, 0xff), "Entity %i: %f,%f", i, p[i].x, p[i].y);
    }
}

int main(int argc, char *argv[]) {
    Tigr *screen = tigrWindow(1024, 576, "Tony", TIGR_AUTO);
    Tigr *tiger = tigrLoadImage("assets/images/tiger.png");

    ecs_world_t* world = ecs_init_w_args(argc, argv);

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Speed);
    ECS_COMPONENT(world, RenderData);

    //ECS_SYSTEM(world, Move, EcsOnUpdate, Position, Speed);
    ECS_SYSTEM(world, Render, EcsOnUpdate, RenderData, Position);

    ECS_ENTITY(world, MyEntity, Position, RenderData);
    ecs_set(world, MyEntity, Position, {256, 50});
    ecs_set(world, MyEntity, RenderData, {tiger, screen});

    ecs_set_target_fps(world, 60);

    while (!tigrClosed(screen))
    {
        tigrClear(screen, tigrRGB(0x80, 0x90, 0xa0));
        ecs_progress(world, 0);
        tigrPrint(screen, tfont, 10, 10, tigrRGB(0xff, 0xff, 0xff), "FT: %.6f", tigrTime());
        tigrUpdate(screen);
    }

    tigrFree(tiger);
    tigrFree(screen);
    return ecs_fini(world);
}