Retrieving data from a pipeline cache

A cache allows us to improve the performance of creating multiple pipeline objects. But for us to be able to use the cache each time we execute our application, we need a way to store the contents of the cache and reuse it any time we want. To do that, we can retrieve the data gathered in a cache.

How to do it...

1. Take the handle of a logical device and use it to initialize a variable of type VkDevice named logical_device.
2. Store the handle of a pipeline cache, from which data should be retrieved, in a variable of type VkPipelineCache named pipeline_cache.

 

3. Prepare a variable of type size_t named data_size.
4. Call vkGetPipelineCacheData( logical_device, pipeline_cache, &data_size, nullptr ) providing the logical_device and pipeline_cache variables, a pointer to the data_size variable, and a nullptr value.
5. If a function call was successful (a VK_SUCCESS value was returned), the size of memory that can hold the cache contents is stored in the data_size variable...