Method DownloadDataAsync

Source/Engine/Graphics/Textures/GPUTexture.cpp:839–883

}

Task* GPUTexture::DownloadDataAsync(TextureData& result)
{
    // Skip for empty ones
    if (MipLevels() == 0)
    {
        LOG(Warning, "Cannot download texture data. It has not ben created yet.");
        return nullptr;
    }
    if (Depth() != 1)
    {
        MISSING_CODE("support volume texture data downloading.");
    }
    PROFILE_CPU();
    PROFILE_MEM(GraphicsTextures);

    // Use faster path for staging resources
    if (IsStaging())
    {
        // Create task to copy downloaded data to TextureData container
        auto getDataTask = ::New<TextureDownloadDataTask>(this, this, result);
        ASSERT(getDataTask->HasReference(this));
        return getDataTask;
    }

    // Create the staging resource
    const auto staging = ToStagingReadback();
    if (staging == nullptr)
    {
        LOG(Error, "Cannot create staging resource from {0}.", ToString());
        return nullptr;
    }

    // Create async resource copy task
    auto copyTask = ::New<GPUCopyResourceTask>(this, staging);
    ASSERT(copyTask->HasReference(this) && copyTask->HasReference(staging));

    // Create task to copy downloaded data to TextureData container
    auto getDataTask = ::New<TextureDownloadDataTask>(this, staging, result);
    ASSERT(getDataTask->HasReference(this) && getDataTask->HasReference(staging));

    // Set continuation
    copyTask->ContinueWith(getDataTask);

    return copyTask;
}

void GPUTexture::SetResidentMipLevels(int32 count)
{