An Impeller specific header prepended to all pipeline cache information that is persisted on disk. This information is used to perform additional integrity checks that may have been missed by the Vulkan driver. More...

#include <pipeline_cache_data_vk.h>

Public Member Functions
	PipelineCacheHeaderVK ()
	Constructs a new empty instance. More...

	PipelineCacheHeaderVK (const VkPhysicalDeviceProperties &props, uint64_t p_data_size)
	Constructs a new instance that will be compatible with the given physical device properties. More...

bool	IsCompatibleWith (const PipelineCacheHeaderVK &other) const
	Determines whether the specified o is compatible with. More...

Public Attributes
uint32_t	magic = 0xC0DEF00D

uint32_t	driver_version = 0

uint32_t	vendor_id = 0

uint32_t	device_id = 0

uint32_t	abi = sizeof(void*)

uint8_t	uuid [VK_UUID_SIZE] = {}

uint64_t	data_size = 0

Detailed Description

An Impeller specific header prepended to all pipeline cache information that is persisted on disk. This information is used to perform additional integrity checks that may have been missed by the Vulkan driver.

Inspired by https://medium.com/@zeuxcg/creating-a-robust-pipeline-cache-with-vulkan-961d09416cda.

Definition at line 23 of file pipeline_cache_data_vk.h.

Constructor & Destructor Documentation

◆ PipelineCacheHeaderVK() [1/2]

impeller::PipelineCacheHeaderVK::PipelineCacheHeaderVK ( )

default

Constructs a new empty instance.

◆ PipelineCacheHeaderVK() [2/2]

impeller::PipelineCacheHeaderVK::PipelineCacheHeaderVK	(	const VkPhysicalDeviceProperties &	props,
		uint64_t	p_data_size
	)

explicit

Constructs a new instance that will be compatible with the given physical device properties.

Parameters

[in]	props	The properties.
[in]	p_data_size	The data size.

Definition at line 100 of file pipeline_cache_data_vk.cc.

     : driver_version(props.driverVersion),
       vendor_id(props.vendorID),
       device_id(props.deviceID),
       data_size(p_data_size) {
   std::memcpy(uuid, props.pipelineCacheUUID, VK_UUID_SIZE);
 }

References uuid.

Member Function Documentation

◆ IsCompatibleWith()

bool impeller::PipelineCacheHeaderVK::IsCompatibleWith ( const PipelineCacheHeaderVK & other ) const

Determines whether the specified o is compatible with.

        The size of the data following the header may be different and
        is not part of compatibility checks.

Parameters

[in] other The other header.

Returns: True if the specified header is compatible with this one, False otherwise. The size of the data following the header may be different.

Definition at line 110 of file pipeline_cache_data_vk.cc.

                                           {
   // Check for everything but the data size.
   return magic == o.magic &&                    //
          driver_version == o.driver_version &&  //
          vendor_id == o.vendor_id &&            //
          device_id == o.device_id &&            //
          abi == o.abi &&                        //
          std::memcmp(uuid, o.uuid, VK_UUID_SIZE) == 0;
 }