Function SetAtlas

engine/gamesys/src/gamesys/scripts/script_resource.cpp:2703–2744

 */

static int SetAtlas(lua_State* L)
{
    DM_LUA_STACK_CHECK(L, 0);

    dmhash_t path_hash = dmScript::CheckHashOrString(L, 1);
    CheckResource(L, g_ResourceModule.m_Factory, path_hash, "texturesetc");

    dmGameSystemDDF::TextureSet texture_set_ddf = {};
    uint32_t num_geometries                     = 0;
    uint32_t num_animations                     = 0;
    uint32_t num_animation_frames               = 0;

    luaL_checktype(L, 2, LUA_TTABLE);
    lua_pushvalue(L, 2);

    dmGraphics::HTexture texture;
    dmhash_t texture_path;
    CheckTextureResource(L, -1, "texture", &texture_path, &texture);

    // Note: We do a separate pass over the lua state to validate the data in the args table,
    //       this is because we need to allocate dynamic memory and can't use luaL_check** functions
    //       since they longjmp away so we can't release the memory..
    CheckAtlasArguments(L, &num_geometries, &num_animations, &num_animation_frames);

    MakeTextureSetFromLua(L, texture_path, texture, num_geometries, num_animations, num_animation_frames, &texture_set_ddf);
    lua_pop(L, 1); // args table

    dmArray<uint8_t> ddf_buffer;
    dmDDF::Result ddf_result = dmDDF::SaveMessageToArray(&texture_set_ddf, dmGameSystemDDF::TextureSet::m_DDFDescriptor, ddf_buffer);
    assert(ddf_result == dmDDF::RESULT_OK);

    dmResource::Result r = dmResource::SetResource(g_ResourceModule.m_Factory, path_hash, ddf_buffer.Begin(), ddf_buffer.Size());

    DestroyTextureSet(texture_set_ddf);

    if(r != dmResource::RESULT_OK)
    {
        return ReportPathError(L, r, path_hash);
    }

    return 0;
}


static void PushGeometry(lua_State* L, int index, dmGameSystemDDF::SpriteGeometry& geom, float tex_width, float tex_height)