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* Update release number to 98.
Public Issues:
* Fix missing markup in flink:vkDestroyPipelineLayout valid usage
statement (pull request 882).
* Add missing contributors for `<<VK_EXT_buffer_device_address>>` (public
pull request 891).
Internal Issues:
* Detect nested bullet points in valid usage blocks and warn about them
during VUID assignment (internal issue 1382).
* Update the style guide to document the process for reserving new bits in
bitmask types (internal issue 1411).
* Clarify for slink:VkApplicationInfo::pname:apiVersion and in the
<<fundamentals-validusage-versions, Valid Usage for Newer Core
Versions>> section when it is valid for an application to use a certain
version of Vulkan API functionality (for an instance and for a
device/physical device); and when the validation layers must generate an
error (internal issue 1412).
* Add optional <<memory-model-availability-visibility, transitive
availability/visibility operations to the memory model, including a new
pname:vulkanMemoryModelAvailabilityVisibilityChains feature for
slink:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR (internal issue
1460).
* Add the code:StorageBuffer storage class to those in the
<<interfaces-resources-descset, Descriptor Set Interface>> (internal
issue 1480).
* Add missing `returnedonly` tags for a number of returned extension
structures that can be passed in pname:pNext chains (internal issue
1515).
* Clean up and rearrange some spec language for
slink:VkRenderPassCreateInfo and slink:VkAttachmentReference.txt
(internal issue 1522).
* Correctly round the code:OpVectorTimesScalar and
code:OpMatrixTimesScalar SPIR-V operations in the <<Precision of core
SPIR-V Instructions>> table (internal merge request 2996).
* Work around cases in flink:vkCmdBeginTransformFeedbackEXT,
flink:vkCmdEndTransformFeedbackEXT, and
slink:VkPipelineCoverageModulationStateCreateInfoNV where an array
parameter is `optional` but the length is not in `vk.xml`. This is an
interim fix using `noautovalidity` + handcoded VU replacing those that
should be autogenerated (internal issue 2944 and
https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/480).
* Remove redundant capability validation of the code:float16 and code:int8
SPIR-V capabilities from the <<spirvenv-capabilities, Capabilities>>
section, since they are already covered in the preceding table.
* Update check_spec_links script, including validation for reference page
open blocks. Fix errors identified by the script.
105 lines
2.7 KiB
Plaintext
105 lines
2.7 KiB
Plaintext
include::meta/VK_AMD_texture_gather_bias_lod.txt[]
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*Last Modified Date*::
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2017-03-21
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*IP Status*::
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No known IP claims.
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*Interactions and External Dependencies*::
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- Requires the
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https://www.khronos.org/registry/spir-v/extensions/AMD/SPV_AMD_texture_gather_bias_lod.html[`SPV_AMD_texture_gather_bias_lod`]
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SPIR-V extension.
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*Contributors*::
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- Dominik Witczak, AMD
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- Daniel Rakos, AMD
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- Graham Sellers, AMD
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- Matthaeus G. Chajdas, AMD
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- Qun Lin, AMD
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- Rex Xu, AMD
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- Timothy Lottes, AMD
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This extension adds two related features.
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Firstly, support for the following SPIR-V extension in Vulkan is added:
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* `SPV_AMD_texture_gather_bias_lod`
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Secondly, the extension allows the application to query which formats can be
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used together with the new function prototypes introduced by the SPIR-V
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extension.
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=== New Object Types
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None.
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=== New Enum Constants
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* Extending elink:VkStructureType:
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** ename:VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD
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=== New Enums
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None.
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=== New SPIR-V Capabilities
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* <<spirvenv-capabilities-table-imagegatherbiaslodamd,code:ImageGatherBiasLodAMD>>
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=== New Structures
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* slink:VkTextureLODGatherFormatPropertiesAMD
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=== New Functions
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None.
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=== Examples
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[source,c++]
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--------------------------------------
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struct VkTextureLODGatherFormatPropertiesAMD
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{
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VkStructureType sType;
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const void* pNext;
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VkBool32 supportsTextureGatherLODBiasAMD;
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};
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// ----------------------------------------------------------------------------------------
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// How to detect if an image format can be used with the new function prototypes.
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VkPhysicalDeviceImageFormatInfo2 formatInfo;
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VkImageFormatProperties2 formatProps;
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VkTextureLODGatherFormatPropertiesAMD textureLODGatherSupport;
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textureLODGatherSupport.sType = VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD;
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textureLODGatherSupport.pNext = nullptr;
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formatInfo.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2;
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formatInfo.pNext = nullptr;
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formatInfo.format = ...;
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formatInfo.type = ...;
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formatInfo.tiling = ...;
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formatInfo.usage = ...;
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formatInfo.flags = ...;
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formatProps.sType = VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2;
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formatProps.pNext = &textureLODGatherSupport;
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vkGetPhysicalDeviceImageFormatProperties2(physical_device, &formatInfo, &formatProps);
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if (textureLODGatherSupport.supportsTextureGatherLODBiasAMD == VK_TRUE)
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{
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// physical device supports SPV_AMD_texture_gather_bias_lod for the specified
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// format configuration.
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}
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else
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{
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// physical device does not support SPV_AMD_texture_gather_bias_lod for the
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// specified format configuration.
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}
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--------------------------------------
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=== Version History
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* Revision 1, 2017-03-21 (Dominik Witczak)
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- Initial draft
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