Function drmFbGetFromBo

src/SFML/Window/DRM/DRMContext.cpp:150–210

}

DrmFb* drmFbGetFromBo(gbm_bo& bo)
{
    const int drmFd = gbm_device_get_fd(gbm_bo_get_device(&bo));
    auto*     fb    = static_cast<DrmFb*>(gbm_bo_get_user_data(&bo));
    if (fb)
        return fb;

    fb     = new DrmFb();
    fb->bo = &bo;

    const std::uint32_t width  = gbm_bo_get_width(&bo);
    const std::uint32_t height = gbm_bo_get_height(&bo);
    const std::uint32_t format = gbm_bo_get_format(&bo);

    std::array<std::uint32_t, 4> strides{};
    std::array<std::uint32_t, 4> handles{};
    std::array<std::uint32_t, 4> offsets{};
    std::array<std::uint64_t, 4> modifiers{};
    modifiers[0]        = gbm_bo_get_modifier(&bo);
    const int numPlanes = gbm_bo_get_plane_count(&bo);
    for (int i = 0; i < numPlanes; ++i)
    {
        strides[static_cast<std::size_t>(i)]   = gbm_bo_get_stride_for_plane(&bo, i);
        handles[static_cast<std::size_t>(i)]   = gbm_bo_get_handle(&bo).u32;
        offsets[static_cast<std::size_t>(i)]   = gbm_bo_get_offset(&bo, i);
        modifiers[static_cast<std::size_t>(i)] = modifiers[0];
    }

    const std::uint32_t flags  = modifiers[0] ? DRM_MODE_FB_MODIFIERS : 0;
    int                 result = drmModeAddFB2WithModifiers(drmFd,
                                            width,
                                            height,
                                            format,
                                            handles.data(),
                                            strides.data(),
                                            offsets.data(),
                                            modifiers.data(),
                                            &fb->fbId,
                                            flags);

    if (result)
    {
        handles.fill(0);
        handles[0] = gbm_bo_get_handle(&bo).u32;
        strides.fill(0);
        strides[0] = gbm_bo_get_stride(&bo);
        offsets.fill(0);
        result = drmModeAddFB2(drmFd, width, height, format, handles.data(), strides.data(), offsets.data(), &fb->fbId, 0);
    }

    if (result)
    {
        sf::err() << "Failed to create fb: " << std::strerror(errno) << std::endl;
        delete fb;
        return nullptr;
    }

    gbm_bo_set_user_data(&bo, fb, drmFbDestroyCallback);